• 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:
    THERMAL BATTERY MANAGEMENT METHOD AND SYSTEM The present invention provides a system, method and apparatus for battery thermal management. In one or more embodiments, the method described involves sensing, with at least one temperature sensor, a temperature of at least one battery cell, wherein the at least one battery cell is at least partially submerged within a liquid contained within a battery housing. The method additionally involves comparing the temperature of at least one battery cell with a high threshold temperature, and that commanding a cooling unit to be activated when at least one processor determines that the temperature of at least one battery cell battery is above the maximum threshold temperature. Furthermore, the method involves circulating, through at least one pump, the liquid via pipe connection from the battery housing to the cooling unit behind the battery housing.
    公开号:BR112015028393B1
    申请号:R112015028393-4
    申请日:2014-03-18
    公开日:2022-02-01
    发明作者:Matthew J. Krolak
    申请人:The Boeing Company；
    IPC主号:
    专利说明:

    FUNDAMENTALS
    [001] The present description concerns thermal management as well as the prevention of thermal runaway. In particular, it pertains to active thermal management and thermal runaway prevention for high energy density lithium-ion battery packs.
    [002] Li-ion battery cells and battery packs have two main concerns regarding thermal management that must be addressed in order to ensure safety and long life. The first concern is that individual battery cells must be kept within their specified temperature range, and cell-to-cell temperature differences within battery packs must be maintained, in order to ensure long life and to maximize battery life. battery value. The second concern is that faulty, damaged or abused cells can go into thermal runaway (especially at elevated temperatures), thus leading to compromised cells and the battery, by and large, uncontrolled for battery designs.
    [003] Currently, several systems exist for batteries that utilize liquids confined in tubes, pipes, or other channels where some portion of the individual battery cells are in contact with the fluid channel or have a path to reject heat to the cooling channel. , either through contact with a thermally conductive component (eg a heat spreader) or through direct contact with other battery cells. These methods generally have limited area of contact with individual battery cells, have poor thermal conduction across the entire contact area, and may have multiple components through which the battery cell heat must travel to reach the final coolant, resulting so in limited ability to effectively remove heat. These measures introduce significant additional mass and bulk to the battery which reduce the bulk, weight and effectiveness of the battery pack while increasing costs and often without providing significant protection from thermal runaway events.
    [004] Another already existing solution is to embed individual battery elements in a solid material that changes phase at an elevated temperature, thus removing large amounts of heat in the melting method without the corresponding increase in temperature above the melting point. . While potentially beneficial in preventing thermal runaway from an individual cell, these solutions can be passive and can allow excess heat that is removed by convection from the case to build up to the melting point of the phase change material, or require additional tubes and/or tubes to implement a traditional active management solution that adds its weight and volume associated with the weight, volume, cost and of the material itself that changes phase. In either case, the possibility exists that the phase-changing material may already be in its molten state at the onset of the thermal runaway, and therefore may not be able to provide any ability to protect against an undesired thermal event. Furthermore, manufacturing the mass phase change material incorporated into a binder matrix and machining the bulk material that results in a suitable shape for this application increases the overall cost of the system.
    [005] Therefore, an improved system and method is needed for thermal management and prevention of thermal runaway to the battery cells. SUMMARY
    [006] The present description relates to a method, system and apparatus for the avoidance of active (or passive) fugitive temperature and thermal management for high energy density lithium-ion battery packs, in particular (or by batteries of any chemistry that require cooling and thermal safety protection in general). The system described for battery thermal management comprises a battery housing and at least one battery cell. In one or more configurations, at least one battery cell is at least partially submerged in a liquid contained within the battery housing. In at least one embodiment, the system further comprises at least one pump for circulating liquid through the tube from the battery housing to a cooling unit back into the battery housing.
    [007] In one or more configurations, the method described for battery thermal management involves sensing, with at least one temperature sensor, a temperature of at least one battery cell. In one or more configurations, at least one battery cell is at least partially submerged in a liquid contained within a battery housing. The method further involves comparing, with at least one processor, the temperature of at least one battery cell with a maximum threshold temperature. Furthermore, the method involves dominating, by at least one processor, a cooling unit to be activated when at least one processor determines that the temperature of at least one battery cell is above the maximum threshold temperature. Furthermore, the method involves circulating, by at least one pump, the liquid via pipe connection from the battery housing to the cooling unit behind the battery housing.
    [008] In one or more configurations, the method further involves comparing, with at least one processor, the temperature of at least one battery cell with a minimum threshold temperature. Furthermore, the method involves dominating, by at least one processor, the cooling unit to be deactivated when at least one processor determines that the temperature of at least one battery cell is below the minimum threshold temperature.
    [009] In at least one configuration, a pressure relief valve is connected to the battery housing. In some configurations, the pressure relief valve is spring loaded. In at least one configuration, a breather is connected to the pressure relief valve.
    [0010] In one or more configurations, at least one of the battery cells is a lithium-ion battery cell. In at least one configuration, the cooling unit is associated with a fan. In some configurations, the liquid is a phase change material (PCM). In one or more configurations, at least one of the temperature sensors is located in at least one battery cell, located within an interior of the battery housing, and/or located in the battery housing.
    [0011] In at least one configuration, a system for battery thermal management comprises a battery housing and at least one battery cell. In one or more configurations, at least one battery cell is at least partially submerged in a liquid contained within the battery housing. The system further comprises at least one temperature sensor for sensing a temperature of at least one battery cell. Furthermore, the system comprises at least one processor for comparing the temperature of at least one battery cell with a high threshold temperature, and for commanding a cooling unit to activate when at least one processor determines that the at least one battery cell is above the high threshold temperature. The system also comprises at least one pump for circulating the liquid via pipe connection from the battery housing to the cooling unit behind the battery housing.
    [0012] In one or more configurations, at least one processor is still to compare the temperature of at least one battery cell with a minimum threshold temperature, and to command the cooling unit to be deactivated when at least one processor determines that the temperature of at least one battery cell is below the minimum threshold temperature.
    [0013] In at least one configuration, a method for battery thermal management involves sensing, with at least one temperature sensor, a temperature of at least one battery cell. In one or more embodiments, at least one battery cell is at least partially submerged within a first liquid contained within the battery housing. The method further involves comparing, with at least one processor, the temperature of at least one battery cell with a maximum threshold temperature. Furthermore, the method involves dominating, by at least one processor, a cooling unit to be activated when at least one processor determines that the temperature of at least one battery cell is above the maximum threshold temperature. Furthermore, the method involves circulating, by at least one pump, a second liquid through tubes from a heat exchanger located in the battery housing to the cooling unit behind the heat exchanger.
    [0014] In one or more configurations, the first liquid and/or the second liquid is (are) a phase change material (PCM).
    [0015] In at least one configuration, a system for battery thermal management comprises a battery housing and at least one battery cell. In at least one embodiment, the at least one battery cell is at least partially submerged within a first liquid contained within the battery housing. The system further comprises at least one temperature sensor for sensing a temperature of at least one battery cell. Furthermore, the system comprises at least one processor for comparing the temperature of at least one battery cell with a high threshold temperature, and for commanding a cooling unit to activate when at least one processor determines that the at least one battery cell is above the high threshold temperature. Furthermore, the system comprises at least one pump for circulating a second liquid through tubes from a heat exchanger located in the battery housing to the cooling unit behind the heat exchanger.
    [0016] The features, functions and advantages can be achieved independently in various embodiments of the present invention or can be combined in still other embodiments. DRAWINGS
    [0017] These and other features, aspects, and advantages of the present invention will be better understood with reference to the following description, appended claims, and accompanying drawings, where: FIG. 1 is a schematic diagram of the active thermal management and thermal runaway prevention system of high energy density lithium-ion battery packs, where refrigerant is circulated throughout the system, in accordance with at least one embodiment of the present disclosure. .
    [0018] FIG. 2 is a diagram illustrating a plurality of battery cells immersed in a liquid contained in the battery housing of the system of FIG. 1, according to at least one embodiment of the present description.
    [0019] FIG. 3 is a flowchart for the described method for active thermal management and thermal runaway prevention for the high energy density lithium-ion battery packs of the system of FIG. 1, according to at least one embodiment of the present description.
    [0020] FIG. 4 is a schematic diagram of the active thermal management and thermal runaway prevention system for high energy density lithium-ion battery packs where refrigerant is not circulated throughout the system, in accordance with at least one embodiment of the present description.
    [0021] FIG. 5 is a flowchart for the described method for active thermal management and high density thermal runaway prevention for high energy density lithium-ion battery packs for the system of FIG. 4, according to at least one embodiment of the present description. DESCRIPTION
    [0022] The methods and apparatus described here provide an operating system for active thermal management and thermal runaway prevention for high energy density lithium-ion battery packs. Specifically, this system provides battery thermal runaway prevention and fluid immersion active cooling for lithium-ion (or other chemical) battery cells with improved thermal performance and the ability to prevent or extinguish thermal runaway in damaged or abused cells for improved safety and extension. of battery life with small volume and light weight.
    [0023] The system of the present description addresses two main concerns regarding battery thermal management to ensure the safety and long life of a battery. These two main concerns are: (1) maintaining an even temperature range between battery cells, and (2) controlling and isolating damaged or abused battery cells from entering a thermal run-up condition.
    [0024] In particular, the system described employs direct fluid immersion which places nearly the entire surface area of the battery cell in good direct thermal contact with the final cooling medium, without incurring any mass, weight, volume or the cost associated with the heat pipe spreaders, support structures, or phase change material associated with any of the other solutions. Fluids with properly chosen boiling points can perform the function of phase change materials without incurring any additional mass, volume or cost and can safely and completely remove all energy associated with a battery cell that can fail catastrophically. otherwise. Battery cells can be hermetically packed together, reducing overall battery volume without sacrificing thermal conduction from the battery cell to the fluid or the risk of a runaway thermal event propagating from cell to battery cell.
    [0025] This system can operate at atmospheric pressure and thus places no additional mechanical stress on each battery cell, and does not require the additional mass or reinforcement of the battery container that would be required of a pressure vessel. The fluid can be distributed through the battery with minimal effort to ensure even temperature distribution, and cooled with a standard heat exchanger in order to keep the battery well below the boiling point of the liquid. , which extends the battery life.
    [0026] If pump power or other external sensors or actuator power are lost, there is no loss of ability to prevent thermal runaway (ie failsafe). Active fluid circulation may not be necessary in some cases due to good thermal conduction to the battery housing. The above approach describes a single-phase or two-phase (boiling) cooling system; however, it is conceivable that the approach could be extended to implement refrigeration (heat pump) application where battery cells can be spray cooled through expansion of the refrigerant. Depending on the coolant chosen, this could require significant pumping power to allow cooling under all conditions and could eliminate the failsafe feature of the invention. In addition, there is the potential for the battery to cool down too much and damage the cells through low temperature operation.
    [0027] It should be noted that all fluids are commercially available which are designed for heat transfer applications; that have suitable boiling points for this application, have negligible toxicity (biologically inert), have no ozone depleting potential, have low greenhouse gas potential, are non-flammable, and have other favorable mechanical properties for this application. Fully implementing this solution is not dependent on the development or discovery of any material or additional modification to the properties of any material not yet described or not yet widely available.
    [0028] In the following description, numerous details are presented in order to provide a more complete description of the system. It will be apparent, however, to one skilled in the art that the described system can be practiced without these specific details. In other cases, well-known features have not been described in detail so as not to unnecessarily obscure the system.
    [0029] FIG. 1 is a schematic diagram of active thermal management and thermal runaway prevention system 100 for high energy density lithium-ion battery packs, where refrigerant 110 is circulated throughout system 100, in accordance with at least one embodiment of the present description. In this figure, a plurality of battery cells 120 are submerged within a liquid within 1 to 10 contained in a battery housing 130. In one or more embodiments, the battery cells 120 are lithium battery cells. It should be noted that, in other embodiments, the battery cells 120 may be several different types of battery cells than lithium battery cells. In one or more embodiments, the liquid of 110 is a phase change material (PCM), such as a dielectric, non-conductive liquid (e.g., Novec by 3M or Fluorinert by 3M). At least one temperature sensor 140 is located in the battery housing 130. The temperature sensor(s) 140 may be located in at least one of the battery cells 120, located within the interior of the battery housing 130, and/or located in the battery housing itself 130.
    [0030] Temperature sensor(s) 140 senses the temperature of at least one of the battery cells 120. At least one processor (not shown in the figure) compares the temperature of the battery cell(s) 120 , with a maximum threshold temperature (for example, this temperature may be a preset maximum temperature specified by the battery cell manufacturer 120). If the processor(s) determine(s) that the temperature of the battery cell(s) 120 is above the high threshold temperature, the processor(s) command(s) (e.g. , sending a command signal a) a cooling unit 150 must be activated (eg connected). In one or more embodiments, the cooling unit 150 utilizes a radiator-like structure. In some embodiments, the cooling unit 150 also utilizes a fan 160 to aid in the cooling method.
    [0031] A pump 170 is connected to the battery housing 130 and connected to the cooling unit 150 by pipes 180, 185 (e.g. by pipes). The cooling unit 150 is also connected to the battery housing 130 with a tube 187 (e.g. by tubes). Liquids 110 flows along tube 180, 185, 187. The pump circulates liquid 170110 (via tube connection 180, 185, 187) from battery housing 130 to cooling unit 150 and back to the battery housing 130.
    [0032] In addition, at least one processor (not shown) compares the temperature of the battery cell(s) 120 to a minimum threshold temperature (e.g. this temperature may be a pre-set minimum temperature specified by the battery cell manufacturer). battery 120). If the processor(s) determine(s) that the temperature of the battery cell(s) 120 is below the minimum threshold temperature, the processor(s) command(s) (e.g. , sending a command signal to a) a cooling unit 150 to be deactivated (e.g. disconnected).
    [0033] A pressure relief valve 190 is connected to battery housing 130. Pressure relief valve 190 is spring loaded 195 and has a vent 197. During normal operation, pressure relief valve 190 remains closed . However, during an extreme situation (e.g., during a thermal acceleration condition, which is when at least one of the battery cells 120 is experiencing thermal runaway), excess vapor produced in the battery housing 130 will push the valve. pressure relief valve 190, and steam will escape through vent 197 of pressure relief valve 190.
    [0034] FIG. 2 is a diagram illustrating 200 a plurality of battery cells 120 immersed in a liquid contained in the battery housing 130 of the system of FIG. 1, according to at least one embodiment of the present description. This figure illustrates an exemplary configuration of battery cells 120 contained within battery housing 130 that system 100 may employ described. It should be noted that in other embodiments, several different types of battery cell configurations 120 may be employed within the battery housing 130.
    [0035] FIG. 3 is a flowchart for the described method 300 for active thermal management and thermal runaway prevention for high energy density lithium-ion battery packs for the system 100 of FIG. 1, according to at least one embodiment of the present description. At the beginning of the method 310 300, at least one temperature sensor senses a temperature of at least one battery cell 320. The battery cell(s) is at least partially submerged in a liquid contained within a battery housing. At least one processor then compares the temperature of the battery cell(s) to a high threshold temperature of 330. When the processor determines that the temperature of the battery cell(s) is above limit, the processor(s) command a cooling unit to be activated 340. At least one pump circulates the liquid via pipe connection from the battery housing to the cooling unit behind the battery housing 350.
    [0036] Then at least one processor compares the temperature of the battery cell(s) to a minimum threshold temperature of 360. When the processor determines that the temperature of the battery cell(s) is below the lower threshold temperature, the processor(s) commands the cooling unit to shut down 370. Then method 300 ends 380.
    [0037] It should be noted that in other embodiments, more or fewer steps than shown for method 300 of FIG. 3 can be performed. In addition, the steps shown in method 300 of FIG. 3 can be performed in several different orders as shown in FIG. 3.
    [0038] FIG. 4 is a schematic diagram of the active thermal management and thermal runaway prevention system 400 for high energy density lithium-ion battery packs where refrigerant 410 (i.e., a "first liquid") is not circulated throughout. system 400, in accordance with at least one embodiment of the present description. In this figure, a plurality of battery cells 420 are submerged in a liquid 410 (i.e., the "first liquid") contained within a battery housing 430. In one or more embodiments, the battery cells 420 are battery cells. of lithium-ion. It should be noted that, in other embodiments, the battery cells 420 may be several different types of battery cells than lithium battery cells. In one or more embodiments, the liquid 410 is a phase change material (PCM), such as a dielectric, non-conductive liquid (e.g., Novec by 3M or Fluorinert by 3M). At least one temperature sensor 440 is located in the battery housing 430. The temperature sensor(s) 440 may be located in at least one of the battery cells 420, located within the interior of the battery housing 430, and/or located in the battery housing itself 430.
    [0039] Temperature sensor(s) 440 senses the temperature of at least one of the battery cells 420. At least one processor (not shown in the figure) compares the temperature of the battery cell(s) 420 , with a maximum threshold temperature (for example, this temperature may be a preset maximum temperature specified by the manufacturer of the 420 battery cells). If the processor(s) determine(s) that the temperature of the 420 battery cell(s) is (are) above the high threshold temperature, the processor(s) commands (eg sending a command signal to) a 450 cooling unit must be activated (eg connected). In one or more embodiments, the cooling unit 450 employs a radiator-like structure. In some embodiments, the cooling unit 450 also utilizes a fan 460 to aid in the cooling method.
    [0040] A pump 470 is connected to a heat exchanger 445 and connected to the cooling unit 450 by tubes 480, 485 (e.g. by tubes). The heat exchanger 445 is located within the battery housing 430 or in the battery housing itself 430. The cooling unit 450 is also connected to the heat exchanger 445 via a pipe connection 487 (eg, by pipes). A liquid of 415 (i.e., a "second liquid") flows along tube 480, 485, 487. Liquid 415 is a phase change material (PCM), such as a dielectric, non-conducting liquid (for example, Novec by 3M or Fluorinert by 3M). The pump circulates liquid 470 415 (via tube 480, 485, 487) from heat exchanger 445 to cooling unit 450 and back to heat exchanger 445.
    [0041] In addition, at least one processor (not shown) compares the temperature of the 420 battery cell(s) to a minimum threshold temperature (e.g. this temperature may be a pre-set minimum temperature specified by the battery cell manufacturer). battery 420). If the processor(s) determine(s) that the temperature of the battery cell(s) 420 is below the minimum threshold temperature, the processor(s) command(s) (e.g. , sending a command signal to a) a cooling unit 450 to be deactivated (e.g. disconnected).
    [0042] A pressure relief valve 490 is connected to battery housing 430. Pressure relief valve 490 is spring loaded 495 and has a vent 497. During normal operation, pressure relief valve 490 remains closed . However, during an extreme situation (e.g., during a thermal run-up condition, which is when at least one of the battery cells 420 experiences thermal runaway), excess vapor produced in the battery housing 430 will push the pressure valve. pressure relief valve 490, and steam will escape through vent 497 of pressure relief valve 490.
    [0043] FIG. 5 is a flowchart for the method 500 described for active thermal management and prevention of thermal runaway for high energy density lithium-ion battery packs for the system 400 of FIG. 4, according to at least one embodiment of the present description. At start 510 of method 500, at least one temperature sensor senses a temperature of at least one battery cell 520. The battery cell(s) is(are) at least partially submerged within a first liquid contained within a battery housing. At least one processor then compares the temperature of the battery cell(s) to a high threshold temperature of 530. When the processor determines that the temperature of the battery cell(s) is above limit, the processor(s) commands a cooling unit to be activated 540. At least one pump circulates a second liquid through tubes from a heat exchanger to the cooling unit behind the exchanger heat 550.
    [0044] Then at least one processor compares the temperature of the battery cell(s) to a minimum threshold temperature of 560. If the processor determines that the temperature of the battery cell(s) is below the temperature threshold, the processor(s) commands the cooling unit to shut down 570. Then method 500 terminates 580.
    [0045] It should be noted that in other embodiments, more or fewer steps than shown for method 500 of FIG. 5 can be performed. In addition, the steps shown in method 500 of FIG. 5 can be performed in several different orders as shown in FIG. 5.
    [0046] While certain illustrative modalities and methods have been described herein, it may be apparent from the foregoing description to those skilled in the art that variations and modifications of these modalities and methods can be made without departing from the true spirit and scope of the described art. There are many other examples of the described technique, each differing from the others in single detail. Accordingly, it is intended that the described technique should be limited only to the extent required by the appended claims and the rules and principles of applicable law.
    权利要求:
    Claims (16)
    [0001]
    1. Method (300) for battery thermal management, the method (300) characterized in that it comprises: sensing (320), with at least one temperature sensor (140), a temperature of at least one battery cell ( 120), wherein the at least one battery cell (120) is at least partially submerged in a liquid (110) contained within a battery housing (130); compare (330), with at least one processor, the temperature of at least one battery cell (120) with a maximum threshold temperature; to command (340), through the at least one processor, a cooling unit (150) to be activated when the at least one processor determines that the battery temperature at least one battery cell (120) is above the high threshold temperature; and circulating (350), through at least one pump (170), the liquid (110) via pipe connection (180, 185, 187) from the battery housing (130) to the cooling unit (150) back to the battery housing (130); wherein the liquid (110) is a phase change material (PCM); wherein a pressure relief valve (190) is connected to the battery housing (130).
    [0002]
    2. Method (300) according to claim 1, characterized in that the method (300) additionally comprises: comparing (360), with the at least one processor, the temperature of at least one battery cell (120) with a minimum threshold temperature; and, commanding (370), through the at least one processor, the cooling unit (150) to be deactivated when the at least one processor determines that the temperature of at least one battery cell (120) is below the threshold temperature. Minimum.
    [0003]
    3. Method (300) according to claim 1, characterized in that the pressure relief valve (190) is spring loaded.
    [0004]
    4. Method (300) according to claim 1, characterized in that a breather (197) is connected to the pressure relief valve (190).
    [0005]
    5. Method (300) according to claim 1, characterized in that at least one of the at least one battery cell (120) is a lithium-ion battery cell.
    [0006]
    6. Method (300) according to claim 1, characterized in that the cooling unit (150) is associated with a fan (160).
    [0007]
    7. Method (300) according to claim 1, characterized in that at least one of the at least one temperature sensor (140) is at least one of those located in at least one battery cell (120), located within from an interior of the battery housing (130), and located in the battery housing (130).
    [0008]
    8. System (100) for battery thermal management using a method as defined in claim 1, the system (100) characterized in that it comprises: a battery housing (130); at least one battery cell (120), wherein the at least one battery cell (120) is at least partially submerged in a liquid (110) contained within the battery housing (130); at least one temperature sensor (140) for sensing a temperature of at least one battery cell (120); at least one processor to compare the temperature of at least one battery cell (120) with a high threshold temperature, and to command a cooling unit (150) to be activated when the at least one processor determines that the temperature of at least one least one battery cell (120) is above the high threshold temperature; and at least one pump (170) for circulating the liquid (110) via pipe connection (180, 185, 187) from the battery housing (130) to the cooling unit (150) and back to the housing. battery pack (130); wherein the liquid (110) is a phase change material (PCM); and, a pressure relief valve (190) is connected to the battery housing (130).
    [0009]
    9. System (100) according to claim 8, characterized in that the at least one processor additionally compares the temperature of at least one battery cell (120) with a minimum threshold temperature, and to command the cooling (150) to be disabled when the at least one processor determines that the temperature of at least one battery cell (120) is below the low threshold temperature.
    [0010]
    10. System (100) according to claim 8, characterized in that the pressure relief valve (190) is spring loaded.
    [0011]
    11. System (100) according to claim 8, characterized in that a breather (197) is connected to the pressure relief valve (190).
    [0012]
    12. System (100) according to claim 8, characterized in that at least one of the at least one battery cell (120) is a lithium-ion battery cell.
    [0013]
    13. System (100) according to claim 8, characterized in that the cooling unit (150) is associated with a fan (160).
    [0014]
    14. System (100) according to claim 8, characterized in that at least one of the at least one temperature sensor (140) is at least one of those located in at least one battery cell (120), located within from an interior of the battery housing (130), and located in the battery housing (130).
    [0015]
    15. Method (500) for battery thermal management, the method (500) characterized in that it comprises: sensing (520), with at least one temperature sensor (440), a temperature of at least one battery cell ( 420); wherein the at least one battery cell (420) is at least partially submerged within a first liquid (410) contained within a battery housing (430); compare (530), with at least one processor, the temperature of at least one battery cell (420) with a maximum threshold temperature; command (540), through the at least one processor, a cooling unit (450) to be activated; when the at least one processor determines that the temperature of at least one battery cell (420) is above the high threshold temperature; circulating (550), through at least one pump (470), a second liquid (415) via pipe connection (480, 485, 487) from a heat exchanger (445) located in the battery housing (430) to the cooling unit (450) and back to the heat exchanger (445); wherein at least one of the first liquid (410) and the second liquid (415) is a phase change material (PCM); wherein a pressure relief valve (490) is connected to the battery housing (430).
    [0016]
    16. System (400) for battery thermal management using a method as defined in claim 15, the system (400) characterized in that it comprises: a battery housing (430); at least one battery cell (420), wherein the at least one battery cell (420) is at least partially submerged within a first liquid (410) contained within the battery housing (430); at least one temperature sensor (440) for sensing a temperature of at least at least one battery cell (420); at least one processor for comparing the temperature of at least one battery cell (420) with a high threshold temperature, and for commanding a cooling unit (450) to be activated when the at least at least one processor determines that the temperature of at least one battery cell (420) is above the high threshold temperature; and at least one pump (470) for circulating a second liquid (415) via pipe connection (480, 485, 487) from a heat exchanger (445) located in the battery housing (430) to the cooling unit (450) and back to heat exchanger (445); wherein at least one of the first liquid (410) and the second liquid (415) is a phase change material (PCM); and, a pressure relief valve (490) is connected to the battery housing (430).
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    法律状态:
    2018-02-27| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-11-05| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-07-13| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    2021-10-05| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-12-14| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2022-02-01| 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 18/03/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/893,202|US9379419B2|2013-05-13|2013-05-13|Active thermal management and thermal runaway prevention for high energy density lithium ion battery packs|
    US13/893,202|2013-05-13|
    PCT/US2014/031004|WO2014186044A1|2013-05-13|2014-03-18|Active thermal management and thermal runaway prevention for high energy density lithium ion battery packs|
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