• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an apparatus (1) for testing an accumulator battery comprising: - an electric charge intended to be connected to the terminals of the battery to be tested, - means (14) for measuring the voltage across the terminals of the battery. battery, and - processing means (11) connected to the measuring means (14) of the voltage and comprising means for determining the state of the battery as a function of the voltage measured at the terminals of the battery. According to the invention, the electrical load comprises a plurality of load resistors (R1, ..., R8) connected in parallel, said processing means (11) being configured to select one or more of said load resistors (R1, ... , R8) so as to adjust the value of the electric charge to a predetermined value.
    公开号:FR3076907A1
    申请号:FR1850363
    申请日:2018-01-17
    公开日:2019-07-19
    发明作者:Morgan Brebant；Jean-Yves PENOUTY
    申请人:E Xteq Europe SAS；
    IPC主号:
    专利说明:

    Test device for a storage battery
    Technical field of the invention
    The present invention relates to the diagnosis of accumulator batteries, and more specifically to an apparatus for evaluating the state of charge of a battery.
    State of the art
    In certain fields, such as for example that of motor vehicles, a battery is conventionally used to supply electrical energy to the engine (in particular during starting) and the electrical equipment of the vehicle.
    To determine the state of charge of the battery, it is known to connect test equipment to the terminals of the battery.
    Among the known equipment, portable devices called battery testers are used which implement an electrical charge, taking the form of an element of fixed impedance or resistance, connected to the terminals of the battery.
    This type of device makes it possible to measure the voltage of the battery in discharge under high intensity. In other words, the battery is used as a power source for the measuring device by making it flow a current of constant intensity).
    To do this, once the device is connected to the battery terminals, the operator presses a button to start the test, and keeps the button pressed for about 15 seconds. During this time, the battery delivers a current of constant intensity in the fixed resistance of the device, the operator being able to observe a voltage drop under charge of the battery on the scale of a display with dial and hand.
    Taking into account the value of CCA of the tested battery which it will have read beforehand on a label of the battery (CCA is characteristic of the capacity of a battery to be able to start an engine - it is the maximum intensity that the battery can be drawn for a period of 30s), the user determines whether the voltage drop is low, in which case the battery is healthy, or if the voltage drop is large, in which case the battery is either insufficiently charged or worn / defective.
    A disadvantage of such a fixed impedance device is that it does not allow to choose among several values of battery discharge current.
    Furthermore, such an approach is insufficiently precise and unreliable.
    Furthermore, in the event of prolonged pressing of the test button, beyond 15 seconds, the temperature of the charging circuit of the measuring device can increase sharply, which can possibly lead to deterioration of the device.
    It is also known to use battery testers implementing a variable impedance element which is constituted by a plurality of carbon disks stacked between two clamping plates, the latter being connected to the battery tested by means of electric cables. .
    Manual tightening of the carbon discs, using a wheel or lever, reduces the resistance between the plates, which increases the charging current.
    During the test, the voltage across the battery is measured using a voltmeter.
    However, the temperature in the carbon disc stack increases rapidly when a strong current flows through it.
    This results in an increase in the resistance of the carbon cell and, consequently, a reduction in the charging current.
    Therefore, the manual clamping must be readjusted permanently in order to maintain the level of charge current at a stable level during the test period.
    There is therefore an alternative need to the battery charge test solutions of the prior art to minimize their complexity of implementation while optimizing their precision and reliability.
    Statement of the invention
    The object of the invention is to propose an improved battery tester which overcomes at least some of the drawbacks of the prior art cited above.
    For this, the invention relates to an apparatus intended for testing a storage battery comprising:
    - an electrical charge intended to be connected to the terminals of the battery to be tested,
    means for measuring the voltage at the terminals of the battery, and
    - processing means connected to the voltage measuring means and comprising means for determining the state of the battery as a function of the voltage measured at the terminals of the battery.
    According to the invention, the electrical load comprises several load resistors connected in parallel, said processing means being configured to select one or more of said load resistors so as to adjust the value of the electrical load to a predetermined value.
    The test device of the invention makes it possible to test the charge of different types of battery.
    To do this, the apparatus comprises a test circuit comprising several load resistors connected in parallel and which can be switched, not manually but by processing means, of the microprocessor type, so as to modify the configuration of the test circuit and the value of the overall electrical charge.
    The solution of the invention allows the automatic selection of a particular charge resistance value adapted to the battery to be tested.
    The invention thus provides a very interesting alternative to the test devices of the prior art, which proves to be more precise, more reliable, and less expensive.
    Testing the battery using the test apparatus of the invention involves discharging the battery with a specified charging current for a given time interval (typically about fifteen seconds), while monitoring the battery output voltage.
    According to a particular aspect of the invention, the processing means are configured to determine the predetermined value of the electric charge as a function of the cold start current of the battery to be tested.
    According to a particular aspect of the invention, the device comprises means for reading and / or means for manual entry of the value of the cold start current of the battery to be tested connected to said processing means.
    According to a particular aspect of the invention, the processing means are configured to calculate a discharge current value of the battery to be tested in the electrical load as a function of the cold start current of the battery to be tested, the predetermined value of the electric charge being a function of the value of the calculated discharge current.
    The device is able to calculate a value of the discharge current through the selected load resistance as a function of the value of the cold start current of the battery to be tested.
    According to a particular aspect of the invention, the value of the calculated discharge current is equal to half the value of the cold start current of the battery to be tested.
    According to a particular aspect of the invention, the values of the load resistors are chosen so that the value of the discharge current of the battery in the electrical load can be adjusted in steps of 50 or 100 amperes (A) by the means of treatment.
    The structure of the charging circuit and the combination of the charging resistors of said circuit make it possible to select values of the discharge current spaced 50 or 100A apart.
    According to a particular aspect of the invention, each of the load resistors is mounted in series with a switch, the processing means being electronically connected to the switches to control the state of said switches.
    According to a particular aspect of the invention, the switches are MOSFET transistors.
    According to a particular aspect of the invention, each of the load resistors is also connected in series with a thermal switch for protecting the device.
    According to a particular aspect of the invention, the device comprises means for displaying the state of the battery.
    The invention also relates to a method for testing a storage battery using an apparatus as described above, comprising:
    - a step of connecting the device to the battery terminals,
    a step for obtaining the cold start current of the battery to be tested,
    a step of calculation by said processing means of a value of discharge current of the battery in the electrical charge of the device as a function of the cold start current of the battery to be tested,
    a step of determining by said processing means a value of the electric charge as a function of the value of the calculated discharge current,
    a step of selection by said means for processing one or more of said load resistors so as to adjust the value of the electric charge to said value determined previously,
    a step of discharging the battery on said electrical charge, the battery delivering a current equal to the value of the calculated discharge current,
    a step of measuring by said means for measuring the voltage across the terminals of the battery,
    a step of determining by said means for processing the state of the battery as a function of the voltage measured across the terminals of the battery.
    List of Figures
    The invention, as well as the various advantages which it presents, will be more easily understood on reading the following description of embodiments thereof, given by way of simple illustrative and nonlimiting examples, and of the accompanying drawings, among which :
    - Figure 1 is a block diagram of the test apparatus according to a first embodiment;
    - Figure 2 is a block diagram of the test apparatus according to a second embodiment;
    - Figure 3 illustrates in detail the main steps of implementing a battery test with an apparatus according to the invention.
    Description of two examples of a test device and method of testing a battery using such a device
    The device 1, called battery tester, is a portable test device intended to be connected to the positive (+) and negative (-) terminals of a rechargeable battery.
    It is used to know precisely the state of discharge of a battery, and makes it possible to estimate the aging of the battery between a new state and an end of life state.
    Figure 1 is a block diagram of the test apparatus 1 according to a first embodiment of the invention.
    It includes a housing 10 and clamps for connecting to the device 1 the terminals of a battery to be tested (not shown).
    The housing 10 of the device 1 comprises:
    processing means, comprising a microprocessor or controller 11, making it possible to control the progress of the test,
    - a storage memory, a USB port and / or wireless communications means for storing and / or transmitting a test history,
    an input interface 13 (such as a keyboard) for entering commands and information, such as the capacity of the battery to be tested in particular,
    means 14 for measuring the voltage at the terminals of the battery (voltmeter) connected to the microprocessor 11,
    an information display device 12 (such as an LCD screen) capable of indicating the value of the voltage measured at the terminals of the battery and / or its state of health or of charge in particular,
    means for supplying the device 1, such as a rechargeable lithium ion battery,
    switching means, taking the form of switches SW1 to SW4, under the control of the microprocessor 11 which can selectively discharge a battery to be tested by means of a load made up of one or more resistors in parallel chosen from the resistors RI to R4.
    The test circuit which is connected to the terminals of the battery comprises a general switch Rt controlled by the microprocessor 11, and four branches A, B, C and D connected in parallel
    Each branch comprises, connected in series, a load resistance of given value, a thermal switch and a switch electronically connected to the microprocessor 11.
    In this example:
    - branch A includes an electrical resistance RI of 240 mQ (milliohm), a thermal switch T ° 1 and a switch SW1 corresponding to a current of 50A,
    - branch B includes an electrical resistance R2 of 120 mQ, a thermal switch T ° 2 and a switch SW2 corresponding to a current of 100A,
    - branch C includes an electrical resistance R3 of 60 mQ, a thermal switch T ° 3 and a switch SW3 corresponding to a current of 200A,
    - branch D includes an electrical resistance R4 of 30 mQ, a thermal switch T ° 4 and a switch SW4 corresponding to a current of 400A.
    The switches SW1 to SW4 can consist of a MOSFET transistor.
    The various electronic components are mounted on an electronic card (or PCB in English for printed circuit board).
    The microprocessor 11 is able to control the opening or closing of each switch SW1 to SW4 so as to select the load resistance or resistors RI to R4 to be connected in parallel to the terminals of the battery.
    The load resistance applied to the battery to be tested is therefore selected by acting on these switches SW1 to SW4.
    Beyond a predetermined temperature value in each of the branches, the corresponding thermal switch opens (it closes at a predetermined temperature, lower than the first).
    The value of the electrical resistors RI to R4 is chosen so that the discharge current I of the battery to be tested in the test circuit is adjustable, the adjustment being carried out in steps of 50A, by selecting the value of the charge.
    The table below details the branches selected by the microprocessor 11 as a function of the value of the cold start current CCA of the battery to be tested, and therefore of the value of the discharge current I determined from this value of the CCA (equal to half the cold start current).
    In this example, the device 1 is able to test batteries whose value of the cold start current CCA is between 100 and 1500A.
    The number of branches in the test circuit can be less than or greater than 4, so that the device is able to test batteries whose value of the cold start current can reach 2000A, for example.
    By way of example, for a value of the cold starting current CCA equal to 200A (amperes), the microprocessor 11 selects a value of discharge current I equal to 100A (ie the value of the current passing through the branch B), in closing the switch SW2 of branch B and opening the other switches, the load resistance being equal to 120 mQ.
    For a value of the cold start current CCA equal to 1500A (cold start amps), the microprocessor 11 selects a value of discharge current I equal to 750A (ie the sum of the currents crossing the branches A to D), in closing the switches of each of the branches A to D.
    Plugged AT B VS D Current in(A) in theplugged 50 100 200 400 CCA value(AT) Value ofdischarge current (A) Selected branch (es) 100 50 AT 200 100 B
    300 150 A + B 400 200 VS 500 250 A + C 600 300 B + C 700 350 A + B + C 800 400 D 900 450 A + D 1000 500 B + D 1100 550 A + B + D 1200 600 C + D 1300 650 A + C + D 1400 700 B + C + D 1500 750 A + B + C + D
    Once this value of test or discharge intensity has been selected, the apparatus 1 maintains the discharge current at this predetermined value and measures the voltage at the terminals of the battery after 15 seconds for example, so as to determine the state of the battery.
    In a particular embodiment of the invention, the device 1 is capable of scanning the label of the battery to be tested. To do this, the device can be equipped with a barcode reader.
    The information read then makes it possible to determine the characteristics of the battery in terms of electrical voltage and capacity, and in particular the value of the cold start current CCA.
    FIG. 2 is a block diagram of the test apparatus 1 according to a second embodiment of the invention.
    The test circuit which is connected to the terminals of the battery here comprises a general switch Rt controlled by a microprocessor 11, and eight branches A to H connected in parallel
    Each branch comprises connected in series a load resistor RI to R8 of given value and a switch SW1 to SW8 electronically connected to the microprocessor 11.
    In this case, branch A comprises a load resistance of 240 mQ, the other branches B to H comprising a load resistance of 120 mQ.
    The discharge current value I can be adjusted between 50A and 750A, in steps of 100A.
    The apparatus 1 illustrated diagrammatically in FIG. 2 is capable of testing batteries whose value of the cold start current can reach 1500A.
    The device 1 comprises two fans intended to create two air flows sweeping the load resistors RI to R8 and the switches SW1 to SW8 respectively, so as to cool the latter.
    A first temperature sensor Tl is arranged upstream of the first load resistor RI and a second temperature sensor T2 is disposed downstream of the last load resistor R8.
    A third temperature sensor T3 is arranged downstream of the last switch SW8.
    The temperature sensors Tl to T3 are connected to the microprocessor 11.
    The apparatus 1 also includes:
    - a storage memory, a USB port and / or wireless communications means for storing and / or transmitting a test history,
    an input interface 13 (such as a keyboard) for entering commands and information, such as the capacity of the battery to be tested in particular,
    - means 14 for measuring the voltage across the battery (voltmeter) connected to the microprocessor 11.
    an information display device 12 (such as an LCD screen) capable of indicating the value of the voltage measured at the terminals of the battery and / or its state of health or of charge in particular,
    means for supplying the device 1, such as a rechargeable lithium ion battery,
    switching means, taking the form of switches SW1 to SW8, under the control of the microprocessor 11 which can selectively discharge a battery to be tested by means of a load consisting of one or more resistors in parallel chosen from the resistors RI to R8.
    The number of branches in the test circuit can be less than or more than 8.
    FIG. 3 illustrates in detail the main steps for implementing a test with an apparatus in accordance with the invention, such as for example that described above in connection with FIG. 1 or FIG. 2.
    The operation of testing a battery using the device 1 is carried out as follows.
    During a first step 101, the operator connects the device 1 to the terminals of the battery to be tested.
    The method then comprises (step 102) a step of obtaining the value of the cold start current CCA of the battery connected to the device.
    1.
    This value of the cold start current CCA can be read on a label carried by the battery using a reader connected to the device 1, or can be entered manually by the operator via the input interface of device 1.
    Note that other information (such as the battery type) can be read or entered at this point.
    During step 103, the operator launches the battery test by pressing a button on the device 1, for example.
    During the following step 104A, the value of the discharge current is determined by the microprocessor (the adjustment of the current to be charged by the battery is automatic, the adjustment being carried out in steps of 50A for the apparatus of FIG. 1 or in steps of 100A for the device of figure 2).
    From this calculated value, the microprocessor determines an overall load resistance value (step 104B), and selects the load resistance (s) of the test circuit (step 104C) by closing or opening the switches (SW1 to SW4 for the device of Figure 1) of the corresponding branches.
    Once the selection has been made, the device 1 draws on the battery for 15 seconds, for example.
    In other words, the battery is discharged on the selected load resistance and delivers a current of constant intensity in this load resistance (step 105).
    The display of the device 1 indicates to the user that the test is in progress.
    The test stops automatically in step 106.
    The microprocessor 11 then acquires the voltage across the terminals of the battery measured by the measurement means 14 at the end of the test (step 107) and determines the state of the battery as a function of this measurement of the voltage (step 108).
    In practice, the device 1 can display a verdict such as battery in good condition, battery to be recharged or battery to be replaced.
    The device 1 can display one or more conditions of the battery tested, such as its state of charge and / or its state of health (in%).
    The device 1 can be equipped with a printer capable of delivering a ticket summarizing the test data.
    The test is automatically stopped when:
    - For the device of FIG. 1, the thermal resistance (s) T ° 1 to T ° 4 of the selected branch (s) opens (s) due to a too high measured temperature;
    - For the device of Figure 2, the temperature measured by at least one of the temperature sensors Tl to T3 is greater than a predetermined value.
    It is possible to restart the test once the temperature has dropped to a suitable level.
    The invention can be easily implemented without using expensive and complex technology.
    The device is particularly, but not exclusively, suitable for vehicle batteries.
    It should be noted that the load resistors of the device 1 may consist of a resistant wire made of nickel-chromium alloy.
    权利要求:
    Claims (11)
    [1" id="c-fr-0001]
    1. Apparatus (1) for testing a storage battery comprising:
    - an electrical charge intended to be connected to the terminals of the battery to be tested,
    means for measuring (14) the voltage across the battery, and
    - processing means (11) connected to the means for measuring (14) the voltage and comprising means for determining the state of the battery as a function of the voltage measured at the terminals of the battery, characterized in that the charge electric comprises several load resistors (R1, ..., R8) connected in parallel, said processing means (11) being configured to select one or more of said load resistors (R1, ..., R8) so as to adjust the value of the electric charge to a predetermined value.
    [2" id="c-fr-0002]
    2. Apparatus (1) according to claim 1, characterized in that the processing means (11) are configured to determine the predetermined value of the electric charge as a function of the cold start current of the battery to be tested.
    [3" id="c-fr-0003]
    3. Apparatus (1) according to claim 2, characterized in that it comprises means for reading and / or means for manual entry (13) of the value of the cold start current of the battery to be tested connected to said means of treatment (11).
    [4" id="c-fr-0004]
    4. Apparatus (1) according to claim 2 or 3, characterized in that the processing means (11) are configured to calculate a discharge current value of the battery to be tested in the electric charge as a function of the cold start current of the battery to be tested, the predetermined value of the electric charge being a function of the value of the calculated discharge current.
    [5" id="c-fr-0005]
    5. Apparatus (1) according to claim 4, characterized in that the value of the calculated discharge current is equal to half the value of the cold start current of the battery to be tested.
    [6" id="c-fr-0006]
    6. Apparatus (1) according to claim 4 or 5, characterized in that the values of the load resistors (R1, ..., R8) are chosen so that the value of the discharge current of the battery in the electrical load can be adjusted in steps of 50 or 100 amps (A) by the processing means (11).
    [7" id="c-fr-0007]
    7. Apparatus (1) according to one of claims 1 to 6, characterized in that each of the load resistors (R1, ..., R8) is connected in series with a switch (SW1, ..., SW8) , the processing means (11) being electronically connected to the switches (SW1, ..., SW8) to control the state of said switches (SW1, ..., SW8).
    [8" id="c-fr-0008]
    8. Apparatus (1) according to claim 7, characterized in that the switches (SW1, ..., SW8) are MOSFET transistors.
    [9" id="c-fr-0009]
    9. Apparatus (1) according to claim 7 or 8, characterized in that each of the load resistors (R1, ..., R4) is also connected in series with a thermal switch (T ° 1, ..., T ° 4) device protection (1).
    [10" id="c-fr-0010]
    10. Apparatus (1) according to one of claims 1 to 9, characterized in that it comprises display means (12) of the state of the battery.
    [11" id="c-fr-0011]
    11. Method for testing a storage battery using an apparatus (1) according to one of claims 1 to 10, characterized in that it comprises:
    a step (101) of connecting the device (1) to the terminals of the battery,
    a step (102) of obtaining the cold start current of the battery to be tested,
    a step (104A) of calculation by said processing means (11) of a value of discharge current of the battery in the electrical charge of the device (1) as a function of the cold start current of the battery to test,
    a step (104B) of determining by said processing means (11) a value of the electric charge as a function of the value of the calculated discharge current,
    a step (104C) of selection by said processing means (11) of one or more of said load resistors (R1, ..., R8) so as to adjust the value of the electric charge to said value determined previously ,
    a step (105) of discharging the battery on said electrical charge, the battery delivering a current equal to the value of the calculated discharge current,
    a step (107) of measuring by said means (14) of the voltage across the terminals of the battery,
    - A step (108) of determination by said processing means (11) of the state of the battery as a function of the voltage measured at the terminals of the battery.
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    同族专利:
    公开号 | 公开日
    FR3076907B1|2020-01-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    US20040222797A1|2003-05-06|2004-11-11|Palanisamy Thirumalai G.|Method and apparatus for determining cold cranking amperes value|
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    US20120182132A1|2004-08-20|2012-07-19|Mcshane Stephen J|System for automatically gathering battery information|
    EP2506024A1|2011-04-01|2012-10-03|DHC Specialty Corp.|Battery tester for cold cranking amperes test|EP3940406A1|2020-07-14|2022-01-19|Hioki E.E. Corporation|Measuring apparatus and testing apparatus|
    RU2753085C1|2020-12-09|2021-08-11|Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский национальный исследовательский технический университет им. А.Н. Туполева - КАИ"|Method for assessing technical condition of electrochemical current source and device that implements it|
    法律状态:
    2019-01-31| PLFP| Fee payment|Year of fee payment: 2 |
    2019-07-19| PLSC| Publication of the preliminary search report|Effective date: 20190719 |
    2020-01-28| PLFP| Fee payment|Year of fee payment: 3 |
    2021-01-26| PLFP| Fee payment|Year of fee payment: 4 |
    2022-01-26| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1850363|2018-01-17|
    FR1850363A|FR3076907B1|2018-01-17|2018-01-17|APPARATUS FOR TESTING A BATTERY|FR1850363A| FR3076907B1|2018-01-17|2018-01-17|APPARATUS FOR TESTING A BATTERY|
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