• 专利附录
  • 专利说明
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    • 专利摘要:
    BATTERY SYSTEM This is a battery system that includes: a power detector that detects output power from an external power source; a charging mechanism that charges a main battery by external power; a temperature rise mechanism that raises a main battery temperature to a temperature no lower than a reference temperature; and a controller controlling the charging mechanism and the temperature rise mechanism, wherein, when the detected output power is lower than a reference power, the controller prohibits a temperature rise process with a SOC of the main battery lower than a load setpoint and performs a load process.
    公开号:BR102016026781B1
    申请号:R102016026781-1
    申请日:2016-11-16
    公开日:2021-08-31
    发明作者:Takashi Murata；Yusuke KURUMA
    申请人:Toyota Jidosha Kabushiki Kaisha；
    IPC主号:
    专利说明:

    CROSS REFERENCE ON RELATED REQUEST
    [001] The full disclosure of Patent Application No. JP 2015-225890 filed on November 18, 2015 which includes the descriptive report, claims, drawings and summary is incorporated herein by reference in its entirety. FIELD OF TECHNIQUE
    [002] The present invention relates to a battery system provided with a vehicle-mounted battery that supplies power to a rotating electrical machine to displace and is rechargeable by external power supplied from an external power source. BACKGROUND
    [003] In the related art, electric vehicles such as electric cars or hybrid cars that move with the use of motor power coming from a rotating electric machine are widely known. Electric vehicles are normally equipped with a battery that supplies power to the rotating electric machine. The battery can be charged by external power supplied from an external power source. In order to carry out external charging, the mobility device is put into a plug-in state in which a charging plug provided in the mobility device is connected to the external power source.
    [004] It is known that battery performance is reduced when the temperature is excessively low. Therefore, in the related art, if the temperature of a battery is low at the time of external charging, a battery temperature rise process is carried out in parallel with a battery charging process (For example, see document JP 2015-159633 A ).
    [005] The maximum output power of the external power supply differs depending on the type of installation, country, region, and the like in which the external power supply is installed. For example, the maximum output power supplied from the external power supply is prescribed by a law in each country or by particular standards (eg JEAC, etc.), and there are some countries in which the maximum output power of the external power supply is low. Furthermore, there are many countries and regions in which the power quality is poor, and thus there is often a case where a nominal power fails to be supplied.
    [006] If the charging and temperature rise processes are carried out in the same way as in a case where the output power from the external power supply is high when the output power from the external power supply is low as described above, the charging process and the temperature rise process may fail to be performed properly. For example, when a plug-in connection is established, the battery system normally starts charging the vehicle-mounted battery and, if necessary (if the battery temperature is low), also starts to raise the battery temperature. However, when the charging and temperature rise processes are carried out in parallel in a state where the maximum output power from the external power supply is low, the power that can be used to charge the battery is significantly reduced, and, as such, a significant increase in the time required to complete the charging process can result.
    [007] Document JP 2012-178899 A discloses a technology in which a threshold temperature is defined according to the maximum output power from the external power supply, and if the battery temperature is not lower than the threshold temperature , only the charging process is performed without raising the temperature, and if the battery temperature is lower than the threshold temperature, only the temperature raising process is performed without charging the battery. According to this technology, the charging and temperature rise processes are not carried out at the same time.
    [008] According to document JP 2012-178899 A, when the battery temperature is low, priority is given to the temperature rise process over the charging process. However, once the plug-in connection is established, a user usually starts charging the battery but not raising the temperature. According to the technology revealed in JP 2012-178899 A, when the battery temperature is low, the temperature rise process is given priority over the charging process against the user's intention. Consequently, the battery may fail to charge quickly. SUMMARY
    [009] Consequently, it is an object of the invention to provide a battery system in which a battery is quickly charged by establishing a plug-in connection even when an output power from an external power source is low.
    [0010] A battery system disclosed in the present application is a battery system that includes a vehicle-mounted battery that supplies power to a rotating electrical machine for displacement and is rechargeable by external power supplied from an external power source, being that the battery system includes:
    [0011] a power sensing mechanism that detects output power from the external power source in a plug-in state in which the external power source is connected to the vehicle-mounted battery; a charging mechanism that charges the vehicle-mounted battery by external power; a temperature rise mechanism that raises a vehicle-mounted battery temperature to a temperature no lower than a prescribed reference temperature; and a control unit controlling the charging mechanism and the temperature rise mechanism, wherein in a low power state in which the output power detected by the power sensing mechanism is lower than a prescribed reference power, the control unit prohibits a temperature rise process by the temperature rise mechanism with a vehicle-mounted battery SOC (state of charge) lower than a prescribed load reference value, and causes the charging mechanism to perform a charging process.
    [0012] In this configuration, fast charge to load setpoint is achieved even in the low power state.
    [0013] In the low power state, the control unit can cause the charging mechanism to charge the vehicle-mounted battery until the SOC of the vehicle-mounted battery reaches a charge stop value that is higher than the value. charge reference temperature, and then if the vehicle-mounted battery temperature is lower than the reference temperature, it can cause the temperature rise mechanism to start the temperature rise process.
    [0014] In this configuration, the temperature rise process can be started in a state in which the excess power required for the temperature rise process is guaranteed.
    [0015] In the low power state, if the SOC of the vehicle-mounted battery is lowered to a level below the load reference value during the temperature rise process by the temperature rise mechanism, the control unit may stop the process of temperature rise by the temperature rise mechanism, and can charge the vehicle-mounted battery to the charging stop value by the charging mechanism.
    [0016] In this configuration, the SOC is prevented from dropping to a level below the load setpoint.
    [0017] The control unit can cause the vehicle-mounted battery to be charged by the charging mechanism after completion of the temperature rise process by the temperature rise mechanism until the SOC of the vehicle-mounted battery reaches the value of cargo stop.
    [0018] In this configuration, the control unit can wait in a state of having a power exceeding that required for the temperature rise process.
    [0019] The control unit can carry out the charging process by the charging mechanism and the temperature rise process by the temperature rise mechanism in parallel in a normal power state in which the output power detected by the temperature detection mechanism power is not lower than the reference power.
    [0020] In this configuration, when a power surplus remains in the normal power state, both the temperature rise process and the charging process can be completed quickly.
    [0021] According to the configuration disclosed in that application, the fast charge to the load reference value can be achieved even in the low power state. Consequently, the intent of the user who connected the vehicle via the plug-in connection is achieved even more quickly. BRIEF DESCRIPTION OF THE DRAWINGS
    [0022] The modality(s) of the present disclosure will be described with reference to the following Figures, in which:
    [0023] Figure 1 is a block diagram illustrating a configuration of a battery system;
    [0024] Figure 2 is a drawing illustrating a difference in power consumption ratio depending on a maximum output power;
    [0025] Figure 3 is a flowchart illustrating a process flow of loading and temperature rise when a plug-in connection is established;
    [0026] Figure 4 is a flowchart illustrating a flow of a normal process;
    [0027] Figure 5 is a flowchart illustrating a process flow for low power;
    [0028] Figure 6 is a flowchart illustrating a flow of an external power supply that monitors the process performed in the normal process;
    [0029] Figure 7 is a flowchart illustrating a flow of an external power supply that monitors the process performed in the process by low power;
    [0030] Figure 8 is a drawing illustrating an example of loading and temperature rise processes in a normal power state; and
    [0031] Figure 9 is a drawing that illustrates an example of the processes of loading and temperature rise in a low power state. DESCRIPTION OF MODALITIES
    [0032] Referring now to the drawings, an embodiment will be described below. Figure 1 is a drawing illustrating a schematic configuration of a battery system 10 according to embodiment. The battery system 10 is mounted on an electric vehicle provided with an MG rotating electric machine as a vehicle motor power source. Examples of the electric vehicle include electric cars that run only by one motor power from the MG rotating electric machine, and hybrid cars that run by one motor power from the MG rotating electric machine and a motor mechanism.
    [0033] The battery system 10 includes a main battery 12 that charges and discharges power, a charging mechanism that charges the main battery 12 by external power, a temperature rise mechanism that raises the temperature of the main battery 12, and a controller 20 that controls the activation of these members. Main battery 12 includes a plurality of electrical cells 12a connected in series. Examples of electrical cells 12a that can be used in the present context include secondary batteries such as nickel hybrid batteries and lithium ion batteries. A double-layer electrical capacitor can be used in place of secondary batteries. A configuration of the main battery 12 may include the plurality of electrical cells 12a connected in parallel.
    The main battery 12 is connected to an inverter 16 via a main system relay 14. The main system relay 14 is switched ON and OFF by the controller 20. When the main system relay 14 is ON, the inverter 16 and a DC/DC converter 22 are electrically connected to the main battery 12. The inverter 16 converts a DC power supplied from the main battery 12 into an AC power and sends it to the electric rotary machine MG. The MG rotary electric machine generates kinetic energy to cause the vehicle to move by receiving the AC power emitted from the inverter 16. The MG rotary electric machine converts kinetic energy generated when braking the vehicle and the kinetic energy emitted from a motor mechanism (not illustrated) into electrical energy. The inverter 16 converts an AC power (regenerated power) generated by the rotating electric machine MG into a DC power, and supplies this to the main battery 12. Consequently, the main battery 12 is charged. A DC/DC converter can be provided between the inverter 16 and the main battery 12. The DC/DC converter described above reduces the power voltage coming from the inverter 16 and sends the reduced voltage power to the main battery 12, and raises the voltage of the power from the main battery 12 and sends the high voltage power to the inverter 16.
    [0035] A voltage value and a current value of the main bacteria 12 are detected by a voltage sensor and a current sensor, respectively, (both are not shown) and are inputted into the controller 20. A temperature sensor 18 which detects a temperature (battery temperature Tb) of the main battery 12 and is provided in the vicinity of the main battery 12. The temperature sensor 18 functions as a battery temperature acquisition unit that acquires the temperature of battery Tb. The battery temperature Tb detected by temperature sensor 18 is input into controller 20. One or a plurality of temperature sensors 18 may be provided. The plurality of temperature sensors 18, when provided, can be arranged in different positions.
    [0036] The controller 20 computes a SOC of current from the main battery 12 from the detected voltage value, current value and battery temperature Tb. The SOC indicates a ratio of a current charging capacity to a full charge capacity of the main battery 12. From this point in this document, the current SOC value obtained by computation is referred to as a "charge value of current Cb."
    [0037] The DC/DC converter 22 is also connected to the main battery 12. The DC/DC converter 22 is connected in parallel to the inverter 16. An auxiliary battery 24 and a heater 26 are connected to the DC/DC converter 22. The converter DC/DC 22 reduces the output voltage of the main battery 12, and supplies the reduced voltage power to the auxiliary battery 24 and heater 26. Operation of the DC/DC converter 22 is controlled by the controller 20.
    [0038] The heater 26 is provided in the vicinity of the main battery 12, and constitutes the temperature raising mechanism that raises the temperature of the main battery 12. The heater 26 is activated by the power coming from the main battery 12. The power coming from the battery The main 12 is reduced in voltage by the DC/DC converter 22, and is supplied to the heater 26. A riser relay 28 is provided in a current path between the DC/DC converter 22 and the heater 26. The riser relay temperature 28 is switched ON and OFF upon receipt of a control signal from controller 20. When temperature rise relay 28 is ON, predetermined power is supplied from DC/DC converter 22 to heater 26 , so that heater 26 generates heat. When heater 26 generates heat, the temperature of main battery 12 increases. The actuation of temperature rise relay 28 is controlled by controller 20.
    [0039] The charging mechanism is also connected to the main battery 12. The charging mechanism is a mechanism that charges the main battery 12 by power from an external power source 100 (external power), and includes a charge relay 34, a charger 30 and an input 32. The charge relay 34 is a relay provided between the charger 30 and the main battery 12, and is turned ON or OFF upon receipt of the control signal from the controller 20. When the relay If the charger 34 is ON, power from the external power supply 100 is supplied to the main battery 12 so that the main battery 12 is charged.
    [0040] When external power is AC power, charger 30 converts AC power to DC power. Input 32 is a connector that allows the connection of a 102 load plug provided on external power supply 100 (eg a commercial power supply). Controller 20 monitors a connection state between input 32 and load plug 102; that is, if the vehicle is in a plug-in state in which the charge plug 102 is inserted into input 32 or in a plug-out state in which the charge plug 102 is not inserted into input 32.
    [0041] A power detector 36 is connected between the charger 30 and the charge relay 34. The power detector 36 detects the maximum output power P of the connected external power supply 100 in the plug-in state. The maximum output power P detected is output to controller 20.
    [0042] The controller 20 functions as a control unit that controls the loading mechanism described above, the temperature rise mechanism, and the like. Controller 20 includes a CPU 38 and memory 40. CPU 38 performs various computations. Memory 40 memorizes programs needed for control, various predefined control parameters, values detected by various sensors, and the like.
    [0043] The external charging to be carried out by the battery system 10 will be described below. When charging main battery 12 with external power is desired, a user inserts charging plug 102 from external power supply 100 into input 32 of the vehicle to achieve plug-in state. Once in the plug-in state, controller 20 charges main battery 12 using external power until main battery 12 reaches a predetermined SOC.
    [0044] In order to carry out the external charge of the main battery 12, the controller 20 memorizes two threshold values; that is, a load setpoint C1 and a load stop value C2 in memory 40. The load setpoint C1 is a SOC value that can be recognized as being fully loaded, and is, for example, a value of approximately 80%. The load stop value C2 is a value that includes some excess value α added to the load reference value C1. In other words, the expression C2= C1+ α is established. The excess value α is set in advance according to the capacity of the main battery 12 and the characteristics (eg power consumption) of the heater 26. The excess value α can be set to values that correspond to the power consumed by the heater 26 for raise the temperature of the main battery 12, and the excess value α can be, for example, a high percentage. During external charging, the controller 20 in principle starts a power supply to the main battery 12 if the SOC (current charge value Cb) of the main battery 12 is not higher than the charge reference value C1, and for power supply when the current load value Cb reaches the load stop value C2.
    [0045] Excessively low battery temperature Tb is known to result in problems such as a reduction in an output of the main battery 12 and a reduction in a chargeable capacity. Therefore, controller 20 also drives heater 26 to raise the temperature of main battery 12 when battery temperature Tb is low. To raise the temperature of the main battery 12, the controller 20 memorizes two threshold values; that is, a temperature that raises the reference temperature Ts and a temperature that raises the stop temperature Te, in memory 40. The temperature that raises the reference temperature Ts is a value defined according to the characteristics of the main battery 12 or similar, and can be set to values, for example, about 0°C. The temperature that raises the stopping temperature Te is a value obtained by adding some hysteresis (various °C, for example) to the temperature that raises the reference temperature Ts. Controller 20 starts raising the temperature when the temperature (battery temperature Tb) of the main battery 12 is lower than the temperature that raises the reference temperature Ts, and ends the temperature rise when the temperature of battery Tb reaches the temperature which raises the stopping temperature Te.
    [0046] In the present context, the charging process and the temperature rise process as described above are normally carried out in parallel. However, in the mode, in the low power state in which the maximum output power P of the external power supply 100 is lower than a prescribed reference power A, the temperature rise process is prohibited as long as the current load value Cb is lower than the load reference value C1 and the charging process is preferably carried out. The reason for this is as follows.
    [0047] In general, the maximum output power P of the external power supply 100 differs depending on the type of installation, country, region, and the like in which the external power supply 100 is installed. For example, the maximum output power P supplied from the external power supply 100 is prescribed by a law of each country or particular standards (eg JEAC, etc.), and there are some countries in which the maximum output power P of external power supply 100 is low. Furthermore, there are many countries and regions in which the power quality is low, and thus there is often a case where nominal power is not supplied.
    [0048] Thus, if the charging process and the temperature rise process are carried out in parallel in the case where the maximum output power P of the external power supply 100 is low, the power sufficient for the charging process will not can be guaranteed, and from there, the time required to complete the charging process can be significantly increased. This will be described with reference to Figure 2. Figure 2 is a drawing illustrating a difference in power consumption due to the maximum output power P. In Figure 2, Condition A shows a case in which only the process of load is performed in the low power state (P < A), Condition B shows a case in which the load and temperature rise processes are performed in parallel in the low power state (P < A), and Condition C shows a case in which the load and temperature rise processes are carried out in parallel in a normal power state (P > A). In Figure 2, the blocks with crossed lines indicate the power to be consumed by the charging process, the blocks with gray crossed lines indicate the power to be consumed by the temperature rise process, and the white blocks indicate the power consumed by other parts of the system.
    [0049] When the external load is carried out, the power is supplied from the external power supply 100 to the main battery 12. The power supplied from the external power supply 100 does not change by whether the temperature rise process is carried out or not. However, when the temperature rise process is performed during external charging, a discharge amount of the main battery 12 increases. Therefore, substantial chargeable power is reduced.
    [0050] In the present context, as shown in Condition A, even in the low power state (P < A), when the temperature rise process is not carried out, the power consumed by the temperature rise process is not necessary, and the power consumed by other parts of the system can also be reduced. Consequently, even in the low power state, if the temperature rise process is not carried out, sufficient power for the charging process is guaranteed. In the normal power state (P > A) as shown in Condition C, sufficient power for the charging process is guaranteed even when the temperature rise and charge processes are carried out in parallel.
    [0051] However, as shown in Condition B, when the temperature rise process and the charging process are performed in parallel in the low power state (P < A), the discharged power of the main battery 12 is increased, and the substantial chargeable power is reduced. Consequently, sufficient power cannot be guaranteed for the charging process, which eventually increases the time to complete the charging process.
    [0052] In the present context, when the plug-in connection is established, it is generally assumed that the user wants to change the main battery 12, but not raise the temperature. In mode, when it is determined that the maximum output power P of the external power supply 100 is low and thus it is difficult to carry out the charging process and the temperature rise process in parallel in a plug-in state, the charging process is performed first, and then the temperature rise process is started if the battery temperature is low after the battery SOC is high enough.
    [0053] Referring now to Figure 3 to Figure 5, the load and temperature rise controls will be described. Figure 3 is a flowchart illustrating a flow of load and temperature rise controls in the plug-in state. Figure 4 is a flowchart illustrating a flow of a normal process in Figure 3, and Figure 5 is a flowchart illustrating a flow of a process for low power in Figure 3.
    [0054] The load and temperature rise controls illustrated in Figure 3 begin when the plug-in state at which load plug 102 from external power supply 100 is inserted into input 32 is established. In the plug-in state, the controller 20 compares the maximum output power P of the external power supply 100 detected by the power detector 36 with the reference power A (S10). The reference power A, in the present context, is a preset value according to necessary specifications for the vehicle, the battery capacity, the performances of the heater 26 (the power consumption of the heater 26, and the like), and the like. The reference power A can be set to a value that is capable of completing the charging process within a prescribed time, for example, even when the charging process and the temperature rise process are carried out in parallel. If the maximum output power P is not lower than the reference power A as a result of comparison, the normal process (S12) is performed. In contrast, if the maximum output power P is lower than the reference power A, the low power process (S14) is performed. In parallel to these processes, the controller 20 confirms whether the vehicle is in the plug-in state or not (S16). If it is confirmed that the vehicle is in the plug-out state, which is not the plug-in state (Not in S16), the controller 20 stops the temperature and load rise processes (S18), and terminates all processes .
    [0055] Figure 4 is a flowchart illustrating a normal process flow. Although the normal process is performed, controller 20 performs two processes; that is, the charging process (S24 to S32) for the main battery 12 and the temperature rise process (S34 to S40) for the main battery 12, in parallel.
    [0056] In the charging process, the SOC (current charge value Cb) of the main battery 12 is acquired first, and then the charge current value Cb is compared to the charge stop value C2 memorized in memory 40 (S24). If the current charge value Cb is not lower than the charge stop value C2 as a result of comparison, it can be determined that the main battery 12 is sufficiently charged, and further charging process is not necessary. Therefore, in this case, the controller 20 does not start the load and wait process. In contrast, when the current charge value Cb is lower than the charge stop value C2, the controller 20 starts the charging process of the main battery 12 (S26). In other words, controller 20 turns ON charge relay 34 to cause external power to be supplied to main battery 12. Although the charging process is carried out, controller 20 acquires the SOC (Cb current charge value) from the main battery 12 periodically to compare the Cb current charge value to the C2 charge stop value (S28). If the current load value Cb is lower than the load stop value C2 as a result of comparison, controller 20 continues the load process.
    [0057] In contrast, if the current load value Cb is not lower than the load stop value C2, the controller 20 stops the load process (S30). In other words, the charge relay 34 is turned OFF and the supply of external power to the main battery 12 is stopped. After the charging process is stopped, the controller 20 detects the SOC (Cb current charge value) of the main battery 12 periodically and the Cb current charge value is compared to the C1 charge reference value (S32). If the current load value Cb is not lower than the load reference value C1, the controller 20 waits as it is. In contrast, when a relation Cb < C1 is established, controller 20 returns to Step S26, and restarts the charging process. Repeating the same processes from then on keeps the SOC of main battery 12 at a value no lower than the charge reference value C1.
    [0058] Subsequently, the temperature rise process in the normal process will be described. In the temperature rise process, controller 20 first compares the battery temperature Tb detected by temperature sensor 18 with the temperature that raises the reference temperature Ts (S34). If the battery temperature Tb is not lower than the temperature that raises the reference temperature Ts as a comparison result, the controller 20 determines that the temperature rise process is not necessary, and waits as it is. In contrast, when the temperature of battery Tb is lower than the temperature that raises the reference temperature Ts, the controller 20 turns ON the heater 26 and starts to raise the temperature of the main battery 12 (S36). In other words, controller 20 turns ON system main relay 14 and temperature rise relay 28 to supply power from main battery 12, which has been reduced in voltage by DC/DC converter 22, to heater 26. , the heater 26 generates heat and the temperature of the main battery 12 is high.
    [0059] When the temperature rise process is performed, the controller 20 compares the battery temperature Tb to the temperature that raises the stop temperature Te periodically (S38). If the battery temperature Tb is lower than the temperature that raises the stopping temperature Te as a result of comparison, the controller 20 continues to raise the temperature, and when the battery temperature Tb reaches the temperature that raises the stopping temperature If or higher, controller 20 stops raising the temperature (S40). When the temperature rise process is stopped, the procedure goes back to Step S34, and the same processes are repeated.
    [0060] Referring now to Figure 5, a process flow for low power will be described below. In the low power state in which the maximum output power P of the external power supply 100 is low, the charging process of the main battery 12 is carried out, and after the main battery 12 has been sufficiently charged, the lifting process of temperature starts. Therefore, in this case, the controller 20 detects the SOC (Cb current load value) of the main battery 12 first, and then compares the Cb current load value to the C2 load stop value (S60). If the current load value Cb is not lower than the load stop value C2 as a result of comparison, the controller 20 determines that the additional load process is not necessary. Therefore, the procedure goes to Step S68 to determine whether the temperature rise process is necessary or not.
    [0061] In contrast, when the current charge value Cb is lower than the charge stop value C2, the controller 20 starts the charging process of the main battery 12 (S62). In other words, controller 20 turns ON charge relay 34 to cause external power to be supplied to main battery 12. Although the charging process is carried out, controller 20 detects the SOC (Cb current charge value) of the main battery 12 periodically to compare the Cb current charge value to the C2 charge stop value (S64). If the current load value Cb is lower than the load stop value C2 as a result of comparison, controller 20 continues the load process. In contrast, if the current load value Cb is not lower than the load stop value C2, the controller 20 determines that the additional load process is not necessary, and stops the load process (S66). In other words, controller 20 turns OFF charge relay 34 to stop supplying external power to main battery 12.
    [0062] If the main battery 12 is sufficiently charged, the controller 20 subsequently compares the battery temperature Tb with the temperature that raises a reference temperature Ts (S68). If the battery temperature Tb is lower than the temperature that raises the reference temperature Ts as a result of comparison, the controller 20 turns ON the heater 26 to start raising the temperature of the main battery 12 (S70). In other words, controller 20 turns ON system main relay 14 and temperature rise relay 28 to supply power from main battery 12, which has been reduced in voltage by DC/DC converter 22, to heater 26.
    [0063] When the temperature rise process is performed, the controller 20 compares the battery temperature Tb to the temperature that raises the stop temperature Te periodically (S72). If the battery temperature Tb is lower than the temperature that raises a stop temperature Te as a comparison result, the controller 20 subsequently compares the current load value Cb to the load reference value C1 (S74). If the current load value Cb is not lower than the load reference value C1 as a result of comparison, the procedure goes to Step S70 continue the temperature rise process as it is. In contrast, if the current charge value Cb is lower than the charge reference value C1, it can be determined that the additional charging process of the main battery 12 is necessary. In this case, controller 20 switches heater 26 OFF to stop the temperature rise process (S76), and proceeds to Step S62 to restart the charging process (S62 to S66).
    [0064] The reason why the current load value Cb is monitored even during the temperature rise process in this way is because the accumulated power in the main battery 12 is consumed by carrying out the temperature rise process. If a ratio Cb < C1 is established as a result of consuming the accumulated power in the main battery 12 and a state that cannot be considered to be "fully charged" is recognized, this means that the intention of the user who had made the connection of plugin is not achieved. Consequently, in the mode, the SOC of the main battery 12 is monitored even during the temperature rise process in the low power state, and the temperature rise process is stopped if the current load value Cb is lower than the value. reference load C1. In other words, in mode, the temperature rise process is prohibited in a state in which the current load value Cb is lower than the load reference value C1.
    [0065] Referring again to the flowchart, the description will be continued. If it is determined that the battery temperature Tb is not lower than the temperature that raises the stop temperature Te during the temperature rise process (Not in S72), controller 20 proceeds to Step S78 to stop the rise process of temperature. Subsequently, the load current value Cb is compared to the load reference value C1 to determine whether the charging process is necessary or not (S80). If the current load value Cb is lower than the load reference value C1 as a result of comparison, the procedure goes to Step S62 to restart the load process. In contrast, if the current load value Cb is not lower than the load reference value C1, the procedure goes to Step S68 to determine whether the temperature rise process is necessary or not. From then onwards, the same processes are repeated until the plug-in connection is released.
    [0066] In the normal process and in the low power process, a process to monitor the external power supply 100 (S82 to S84 and S86 to S88) as illustrated in Figure 6 and Figure 7 can be performed in parallel with the charging process and the temperature rise process. Figure 6 is a flowchart illustrating a monitoring process to be performed in parallel with the charging process (S24 to S32) and the temperature rise process (S34 to S40) in the normal process (Figure 4). In the monitoring process, controller 20 always monitors the maximum output power P (S82). If the maximum output power P is lower than the reference power A (Not in S82), the charging process and the temperature rise process are stopped (S84), and the procedure goes to the low power process ( Figure 5). Figure 7 is a flowchart illustrating the monitoring process to be performed in parallel with the load and temperature rise processes (S60 to S80) in the low power process (Figure 5). In the monitoring process, too, controller 20 always monitors the maximum output power P (S86). If the maximum output power P is not lower than the reference power A (Yes in S86), the load and temperature rise processes are stopped (S88), and the procedure goes to the normal process (Figure 4) .
    [0067] In this way, even after the procedure has gone to the normal process or the low power process in Step S10, the load and temperature rise processes can be carried out additionally in an appropriate way by monitoring the maximum output power P periodically. In other words, when the supplied power is not stable in countries or regions that have a low power quality, the power state can change from the normal power state to the low power state or vice versa during the charging process. If the normal process is continued even though the power state is changed from the normal power state to the low power state, sufficient power for the charging process is not guaranteed, and the time required to complete the charging process may be increased. Even though the power state is the low power state at the time of plug-in connection, if the state is restored to the normal power state after that, it is desirable to transition to the normal process to reduce the time needed to complete the charging process or the temperature rise process. Therefore, even after transitioning to the normal process or to the low power process in Step S10, the maximum output power P can be monitored periodically to switch the process to be taken according to the maximum output power P.
    [0068] Referring now to Figure 8 and Figure 9, an example of the loading and temperature rise processes in the plug-in state will be described. Figure 8 is a drawing illustrating an example of the load and temperature rise processes in the normal power state (P > A). In Figure 8, it is assumed that charge plug 102 is inserted into input 32 at time t0. The SOC (current charge value Cb) of the battery at time t0 is assumed to be sufficiently lower than the load stop value C2, and the battery temperature Tb is assumed to be sufficiently lower than the temperature that raises the temperature of reference Thes. In this case, controller 20 starts both the load and temperature rise processes at time t0. When the temperature rise process starts, the battery temperature Tb gradually rises. When the charging process starts, the current charge value Cb also increases gradually. However, at this time, since the temperature rise process is carried out in parallel with the charging process, the rise rate of the current load value Cb is relatively low. Subsequently, if the battery temperature Tb reaches the temperature that raises the stop temperature Te at time t1, the controller 20 stops the temperature rise process. In contrast, since the current load value Cb does not reach the load stop value C2, the controller 20 continues the load process. At that time, since the temperature rise process is stopped, the amount of discharge from the main battery 12 is reduced, so that the rise rate of the current charge value Cb is improved. If the load current value Cb reaches the load stop value C2 at time t2, the charging process is also stopped. Thereafter, the controller 20 monitors the battery temperature Tb and the charge current value Cb, and carries out the charging process if the charge current value Cb is lower than the charge reference value C1 , and restarts the temperature rise process if the battery temperature Tb is lower than the temperature that raises the reference temperature Ts.
    [0069] Referring now to Figure 9, an example of the load and temperature rise processes in the low power state (P < A) will be described below. Also in Figure 9, charge plug 102 is assumed to be inserted into input 32 at time t0 in the same way as in Figure 8. The SOC (Cb Current Charge Value) of the battery at time t0 is assumed to be sufficiently higher lower than the charge stop value C2, and the battery temperature Tb is assumed to be sufficiently lower than the temperature that raises the reference temperature Ts. In the case of the low power state, the controller 20 starts the charging process first. When the charging process is carried out, the current charge value Cb rises gradually. If the main battery 12 is charged, the battery temperature Tb rises slightly by the generation of heat from the electric cells 12a themselves.
    [0070] When the current load value Cb reaches the load stop value C2 at time t1, the controller 20 stops the load process and, on the other hand, starts the temperature rise process. Starting the temperature rise process, the battery temperature Tb rises gradually. Since the power is used for the temperature rise process, the SOC (Cb current charge value) of the main battery 12 is gradually reduced. When the current load value Cb is reduced to a level lower than the load reference value C1 at time t2, the controller 20 stops the temperature rise process and restarts the charging process same as the battery temperature Tb do not reach the temperature that raises the stopping temperature Te. When the current charge value Cb is reduced to a level below the charge reference value C1 in this way, the temperature rise process is stopped and the charging process is restarted regardless of the battery temperature Tb, so that the battery main 12 can be held constant in the fully charged state (Cb > C1). Hence, the intent of the user who made the plug-in connection; that is, the user's need to charge the main battery 12 can always be satisfied.
    [0071] Restarting the charging process, when the current load value Cb reaches the load stop value C2 at time t3, the controller 20 stops the charging process and restarts the temperature rise process. If the battery temperature Tb reaches the temperature that raises the stop temperature Te at time t4 as a result of the temperature rise process, the controller 20 stops the temperature rise process. At this time, since the power is consumed by the temperature rise process, the current load value Cb value is lower than the load stop value C2, but it is higher than the load reference value C1, which can be recognized as being fully charged. Therefore, controller 20 does not perform a recharge, and waits as it is.
    [0072] As is clear from the description so far, in the process for low power, the temperature rise process is prohibited as long as the SOC of the main battery 12 is lower than the load reference value C1, and the process of loading is carried out preferably. In other words, priority is always given to the charging process until the fully charged state (Cb > C1), which the user wants, is reached. Consequently, even in the low power state in which the maximum output power P is low, the user's intention to "fully charge the main battery" is reached at a relatively early stage, and once the intention (fully charged state ) is achieved, the state of conquest of intention can be maintained.
    [0073] In the mode, in the low power state, the performance of the temperature rise process is allowed only after the main battery has charged until the current load value Cb reaches the load stop value C2, which is higher than the C1 load reference value. By charging the main battery in advance to the charge stop value C2 in this way, the excess power required for the temperature rise process can be guaranteed.
    [0074] In the mode, in the low power state, the temperature rise process is stopped and restarts the charging process when the current load value Cb is lowered to a level below the load reference value C1, which can be recognized as fully charged, in association with the performance of the temperature rise process. Consequently, the current load value Cb can be prevented from being reduced to the level of the load reference value C1 or less, which can be recognized as fully loaded.
    [0075] In the mode, in the normal power state, the charging process and the temperature rise process are carried out in parallel. Consequently, in the case of the normal power state, both the process of raising the temperature and charging the main battery 12 can be completed quickly.
    [0076] The configuration described up to this point is just an example, and as long as the charging process is carried out and the temperature rise process is prohibited as long as the Cb < C1 ratio is established in the low power state, other settings can be modified as necessary. For example, in the mode, when the temperature rise process is carried out in the low power state (Steps S70 to S74 in Figure 5), the charging process is stopped. However, as long as the temperature rise process is prohibited while the relation Cb < C1 is established, the temperature and load rise processes can be carried out in parallel while the relation Cb > C1 is established.
    [0077] In the mode, once the main battery is charged to the charge stop value C2, the charging process is not restarted as long as the charge current value is reduced to a level below the charge reference value C1 . However, the main battery can be charged at the stop charge value C2 after the battery temperature Tb has been raised to the temperature that raises the stop temperature Te. In other words, after the temperature rise process has been stopped at Step S78 in Figure 5, the procedure can go to Step S60 instead of Step S80. In this configuration, a state in which the excess power α required for the temperature rise process is guaranteed can be maintained beyond the load setpoint C1 that can be recognized when fully loaded.
    [0078] Although the power is supplied from the main battery 12 to the heater 26 when the temperature rise process is carried out in the mode, the power can be supplied from the external power supply 100 directly (without the intermediary of the main battery 12) to the heater 26.
    权利要求:
    Claims (3)
    [0001]
    1. Battery system (10) which includes a vehicle mounted battery (12) that supplies power to a rotating electric machine for displacement and is rechargeable by external power supplied from an external power source (100), the system of battery (10) comprising: a power sensing mechanism (36) which detects output power from the external power supply (100) in a plug-in state to which the external power supply (100) is connected to the vehicle mounted battery (12); a charging mechanism (30, 32, 34) which charges the vehicle mounted battery (12) by external power; a temperature rise mechanism (26) which is powered by the battery mounted in a vehicle (12) and is configured to raise a temperature of the battery mounted on a vehicle (12) to a temperature no lower than a prescribed reference temperature; and a control unit (20) that controls the loading mechanism (30, 32, 34) and the temperature rise mechanism (26), characterized in that they are in a low power state in which the output power is detected by the mechanism. sensing power (36) is lower than a prescribed reference power, the control unit (20) prohibits a temperature rise process by the temperature rise mechanism (26) when a SOC of the battery mounted on a vehicle (12 ) is lower than a prescribed reference value, and causes the charging mechanism (30, 32, 34) to perform a charging process, in which the reference power value has a value that enables the completion of the charging process. load within a prescribed time when the charging process and the temperature rise process are carried out simultaneously, and when in the low power state, the control unit (20) causes the charging mechanism (30, 32, 34 ) charge the vehicle-mounted battery ( 12) until the SOC of the vehicle-mounted battery (12) reaches a charge stop value that is higher than the charge reference value, and then if the temperature of the vehicle-mounted battery (12) is higher lower than the reference temperature, causes the temperature rise mechanism (26) to start the temperature rise process and in that, in the low power state, when the SOC of the vehicle-mounted battery (12) is reduced to a level below the load reference value during the temperature rise process by the temperature rise mechanism (26), the control unit (20) for the temperature rise process by the temperature rise mechanism (26), and causes the charging mechanism (30, 32, 34) to charge the vehicle mounted battery (12) to the charge stop value.
    [0002]
    2. Battery system (10) according to claim 1, characterized in that the control unit (20) causes the charging mechanism (30, 32, 34) to charge the battery mounted on a vehicle (12 ) after completion of the temperature rise process by the temperature rise mechanism (26) until the SOC of the vehicle-mounted battery (12) reaches the load stop value.
    [0003]
    3. Battery system (10) according to any one of claims 1 to 2, characterized in that the control unit (20) carries out the charging process using the charging mechanism (30, 32, 34 ) and the temperature rise process using the temperature rise mechanism (26) in parallel in a normal power state in which the output power detected by the power detection mechanism (36) is not lower than the power of reference.
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    RU2016144986A3|2018-05-16|
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    法律状态:
    2017-08-01| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2020-02-04| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-06-15| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-31| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 16/11/2016, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2015225890A|JP6225977B2|2015-11-18|2015-11-18|Battery system|
    JP2015-225890|2015-11-18|
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