WO2022142829A1 - 一种热失控处理方法、装置、系统及存储介质 - Google Patents

一种热失控处理方法、装置、系统及存储介质 Download PDF

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Publication number
WO2022142829A1
WO2022142829A1 PCT/CN2021/131273 CN2021131273W WO2022142829A1 WO 2022142829 A1 WO2022142829 A1 WO 2022142829A1 CN 2021131273 W CN2021131273 W CN 2021131273W WO 2022142829 A1 WO2022142829 A1 WO 2022142829A1
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Prior art keywords
battery module
battery
module
voltage
power
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Ceased
Application number
PCT/CN2021/131273
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English (en)
French (fr)
Inventor
陈小波
柯剑煌
李耀
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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Filing date
Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to KR1020227019065A priority Critical patent/KR102720955B1/ko
Priority to JP2022533077A priority patent/JP7457121B2/ja
Priority to EP21899277.4A priority patent/EP4060791A4/en
Priority to US17/834,928 priority patent/US12294067B2/en
Publication of WO2022142829A1 publication Critical patent/WO2022142829A1/zh
Anticipated expiration legal-status Critical
Priority to US19/097,367 priority patent/US20250260079A1/en
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • H—ELECTRICITY
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    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
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    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H—ELECTRICITY
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    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
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    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • H—ELECTRICITY
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    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H—ELECTRICITY
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    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery heat dissipation, and in particular, to a thermal runaway processing method, device, system and storage medium.
  • thermal runaway of the battery refers to the uncontrollable chain decomposition reaction of the power battery for some reasons, resulting in a sharp increase in the internal temperature, which eventually leads to the failure of the battery cell, and is accompanied by a large amount of gas and heat generation.
  • causes of thermal runaway include but are not limited to mechanical collision, internal short circuit, overcharge, overheating, etc.
  • the present application provides a thermal runaway processing method, device, system, and storage medium, which can use a battery module without thermal runaway to supply power to a cooling system , so that the cooling system cools and dissipates heat for the entire power battery pack, takes away the heat generated by thermal runaway, achieves a better heat dissipation effect, and improves the safety of the power battery pack.
  • an embodiment of the present application provides a thermal runaway processing method, including:
  • the second battery module is used to supply power to a cooling system, and the cooling system is used for cooling the power battery pack.
  • the obtaining a second battery module based on the first battery module includes:
  • the second battery module Based on the rated voltage of the first battery module and the cooling system, the second battery module is obtained, and the output voltage of the second battery module is greater than or equal to the rated voltage of the cooling system.
  • the obtaining a second battery module based on the first battery module includes:
  • VCU vehicle control unit
  • the obtaining a second battery module based on the first battery module includes:
  • VCU Vehicle Control Unit
  • the second battery module is obtained based on the rated voltage of the cooling system and the first battery module.
  • the obtaining a second battery module based on the first battery module includes:
  • the second battery module is acquired.
  • the obtaining a second battery module based on the first battery module includes:
  • VCU vehicle control unit
  • the battery parameters include: the real-time voltage of the battery module;
  • the determining that thermal runaway occurs in the first battery module according to the battery parameters of each battery module of the plurality of battery modules includes:
  • the real-time voltage change rate of the battery module is greater than or equal to the fourth preset threshold; and/or,
  • an embodiment of the present application provides a thermal runaway processing device, and the thermal runaway processing device includes:
  • an acquisition module for acquiring battery parameters of each battery module of a plurality of battery modules, the plurality of battery modules forming a power battery pack;
  • a processing module configured to determine that thermal runaway occurs in the first battery module according to battery parameters of each battery module of the plurality of battery modules;
  • the processing module is further configured to obtain a second battery module based on the first battery module, where the second battery module is at least one battery in the power battery pack except the first battery module module;
  • the processing module is further configured to use the second battery module to supply power to a cooling system, and the cooling system is configured to cool the power battery pack.
  • the processing module is used to:
  • the second battery module Based on the rated voltage of the first battery module and the cooling system, the second battery module is obtained, and the output voltage of the second battery module is greater than or equal to the rated voltage of the cooling system.
  • the processing module is used to:
  • VCU vehicle control unit
  • the processing module is used to:
  • VCU Vehicle Control Unit
  • the second battery module is obtained based on the rated voltage of the cooling system and the first battery module.
  • the processing module is used to:
  • the second battery module is acquired.
  • the processing module is used to:
  • VCU vehicle control unit
  • the battery parameters include: the real-time voltage of the battery module; the processing module is used for:
  • the real-time voltage change rate of the battery module is greater than or equal to the fourth preset threshold; and/or,
  • an embodiment of the present application provides a battery management system, where the battery management system includes:
  • a memory communicatively coupled to the at least one processor
  • the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the thermal runaway handling method as described above.
  • an embodiment of the present application provides a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to execute the above-mentioned Thermal runaway treatment methods.
  • thermal runaway processing system where the thermal runaway processing system includes the battery management system as described above.
  • the thermal runaway processing method in the present application includes first acquiring battery parameters of each battery module of a plurality of battery modules in a power battery pack , and then determine the thermal runaway of the first battery module according to the battery parameters of each battery module of the plurality of battery modules, and then obtain the second battery module based on the first battery module, wherein the second battery module is In the power battery pack, at least one battery module other than the first battery module is used, and finally the second battery module is used to supply power to the cooling system.
  • the thermal runaway processing method can use the second battery module without thermal runaway to supply power to the cooling system, so that the cooling system can work normally and take away the internal factors of the power battery pack.
  • the heat generated by thermal runaway cools and dissipates the power battery pack to achieve a good heat dissipation effect, thereby improving the safety of the power battery pack.
  • FIG. 1 is a schematic structural diagram of a thermal runaway processing system provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a hardware structure of a battery management system provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a thermal runaway processing method provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a thermal runaway processing method provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a power battery pack provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a power battery pack provided by another embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a power battery pack provided by another embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a thermal runaway processing device provided by an embodiment of the present application.
  • thermal runaway processing system 100 battery management system 10; processor 101; memory 102; vehicle controller 20; power battery pack 200; cooling system 300; thermal runaway processing device 800; acquisition module 801;
  • FIG. 1 is a thermal runaway processing system provided by an embodiment of the present application.
  • the thermal runaway processing system 100 includes a battery management system 10 (Battery Management System, BMS for short).
  • BMS Battery Management System
  • the thermal runaway processing system 100 is used for When thermal runaway occurs in the power battery pack 200 , the power battery pack 200 is used to supply power to the cooling system 300 , thereby cooling the power battery pack 200 .
  • the power battery pack 200 includes a plurality of battery modules, and each battery module is connected to the battery management system 10 in communication. The battery modules in the power battery pack 200 can form various power supply circuits.
  • the battery management system 10 can identify the thermal runaway phenomenon according to the battery parameters of the battery module, and then determine the first battery When thermal runaway occurs in the module, the battery module with thermal runaway is shielded, and a second battery module is obtained.
  • the second battery module is at least one battery module other than the first battery module in the power battery pack 200 , and the use does not occur.
  • the thermally runaway battery module that is, the second battery module forms a high-voltage power supply circuit to supply power to the cooling system 300 , and then activate the cooling system 300 to cool the power battery pack 200 and dissipate heat.
  • the cooling system 300 includes a water pump and a battery cooler, wherein the water pump can be powered by a low-voltage system (12V). After the water pump is turned on, the cooling liquid circulates, and the cooling liquid enters the cold plate in the power battery pack 200 to cool it down to achieve A certain heat dissipation effect, and the battery cooler is powered by the high-voltage circuit formed by the battery module without thermal runaway, so as to drive the battery cooler to work normally, and the refrigerant is passed into one side of the battery cooler, and the other side is passed for cooling.
  • a low-voltage system (12V) After the water pump is turned on, the cooling liquid circulates, and the cooling liquid enters the cold plate in the power battery pack 200 to cool it down to achieve A certain heat dissipation effect, and the battery cooler is powered by the high-voltage circuit formed by the battery module without thermal runaway, so as to drive the battery cooler to work normally, and the refrigerant is passed into one side of the battery cooler, and the other side is passed for cooling.
  • the two fully exchange heat in the battery cooler the heat in the cooling liquid is taken away by the refrigerant, and the cooling liquid after the cold water flows out of the battery cooler and then flows into the power battery pack to dissipate heat and form a cycle.
  • the battery cooler can forcibly cool the cooling liquid, greatly improve the cooling efficiency of the cooling liquid, and quickly take away the internal heat of the power battery pack 200.
  • the thermal runaway processing system 100 can Using the battery module without thermal runaway to supply power to the cooling system 300 greatly improves the cooling efficiency of the cooling liquid, improves the cooling effect of the cooling system 300 on the power battery pack 200 , and improves the safety of the power battery pack 200 .
  • the thermal runaway processing system 100 further includes a vehicle controller 20 (Vehicle Control Unit, VCU for short), the VCU 20 is connected to the battery management system 10 in communication, and the battery management system 10 can connect the batteries of each battery module
  • VCU Vehicle Control Unit
  • the parameters are sent to the VCU20 for processing and analysis by the VCU20 to determine the thermally runaway battery module, that is, to determine the first battery module, and to obtain the second battery module based on the thermally runaway battery module and the rated voltage of the cooling system.
  • the pack 200 achieves a good cooling effect and improves the safety of the power battery pack 200 .
  • the battery management system 10 may obtain the rated voltage of the cooling system 300 sent by the VCU 20, and then obtain the second battery module based on the rated voltage of the cooling system 300 and the first battery module, that is, obtain no heat generation
  • the battery management system 10 uses the second battery module to supply power to the cooling system 300 , so that the cooling system 300 cools the power battery pack 200 and dissipates heat.
  • the thermal runaway processing system can use the second battery module without thermal runaway to supply power to the cooling system, so that the cooling system can work normally, take away the heat generated by the thermal runaway in the power battery pack, and cool the power battery pack. And heat dissipation, to achieve a good heat dissipation effect, thereby improving the safety of the power battery pack.
  • the battery management system 10 may be provided with: at least one processor 101 (one processor is used as an example in FIG. 2 ) and a memory 102 that are communicatively connected through a system bus or other means.
  • the processor 101 is configured to provide computing and control capabilities to control the battery management system to complete thermal runaway processing and perform related tasks, for example, to control the battery management system 10 to perform any one of the following embodiments. Thermal runaway treatment methods.
  • the memory 102 can be used to store non-transitory software programs, non-transitory computer-executable programs and modules, such as program instructions/ module.
  • the processor 101 can implement the thermal runaway processing method in any of the following method embodiments by running the non-transitory software programs, instructions and modules stored in the memory 102.
  • the memory 102 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid-state storage device.
  • FIG. 3 is a schematic flowchart of a thermal runaway processing method provided by an embodiment of the present application.
  • the method may be performed by any type of battery management system, such as the battery management system shown in FIG. 1 .
  • the method may include, but is not limited to, the following steps:
  • S31 Obtain battery parameters of each battery module of the plurality of battery modules, where the plurality of battery modules form a power battery pack;
  • the power battery pack includes a plurality of battery modules, and a high-voltage power supply circuit can be formed by a high-voltage wire bundle in series or in parallel between the battery modules.
  • the characteristics of each battery module can be represented by its battery parameters.
  • the battery parameters include: But not limited to the real-time voltage of the battery module, the real-time output current/power of the battery module, the reference voltage of the battery module, and the sampling signal for sampling the battery module, etc., wherein each battery module includes n battery modules.
  • Each cell has cell parameters such as cell reference voltage, cell real-time voltage, etc.
  • the total voltage of n cells constitutes the voltage of the battery module. Therefore, the battery parameters of the battery module can also be passed through the battery model.
  • the cell parameters in the group are represented.
  • S32 Determine the thermal runaway of the first battery module according to the battery parameter of each battery module of the plurality of battery modules;
  • thermal runaway occurs in a certain battery module, its battery parameters deviate from the reference value. According to the deviation, it can be determined that thermal runaway occurs in the battery module. Specifically, if the real-time voltage of the first battery module is the same as The reference voltage difference is greater than or equal to the third preset threshold; and/or, the real-time voltage change rate of the battery module is greater than or equal to the fourth preset threshold; and/or, the real-time voltage sampling of the battery module is abnormal , it is determined that the first battery module has thermal runaway.
  • the reference voltage is the voltage before the thermal runaway of the battery module
  • the abnormal real-time voltage sampling of the battery module may refer to the abnormal communication of the sensor that samples the voltage of the battery module
  • the third preset threshold and the fourth preset threshold can be determined according to set as required.
  • the first battery module with thermal runaway can also be determined according to the parameters of the battery cells in the battery module, and each cell in the battery module is identified accordingly. If there is an abnormality, it is determined that the battery module containing the cell is thermally out of control.
  • the difference between the real-time voltage of the cell and the reference voltage of the cell is greater than or equal to the set threshold, and/or the real-time voltage change rate of the cell Greater than or equal to the set threshold, and/or the communication of the voltage sampling sensor at the corresponding position of the cell is abnormal, and/or the total voltage of the battery module containing the cell and n*V1 (n is the number of cells contained in the battery module, V1 is the reference voltage of the battery cell) if the difference is greater than the set threshold, it is determined that the battery module has thermal runaway.
  • the number of battery modules included in the first battery module is the number of all thermal runaway battery modules. If the No. 1 battery module in the power battery pack has thermal runaway, the first battery module only includes the No. 1 battery module. The battery module, if the No. 1 battery module, the No. 3 battery module and the No. 4 battery module in the power battery pack are all thermally out of control, the first battery module includes the No. 1 battery module, the No. 3 battery module and the 4th battery module.
  • S33 Obtain a second battery module based on the first battery module, where the second battery module is at least one battery module other than the first battery module in the power battery pack;
  • the second battery module is some battery modules or even all battery modules in the battery modules without thermal runaway. Based on a certain selection strategy, the second battery module is selected from the battery modules without thermal runaway in the power battery pack.
  • the battery module and the second battery module can form a high-voltage safety power supply loop to supply power to the cooling system through a series-parallel connection.
  • the selection strategy may include various strategies, for example, based on the rated voltage and/or rated power and/or rated current of the cooling system, etc., or based on the temperature of the cooling liquid in the cooling system, or based on the battery temperature in the power battery pack, etc.
  • Condition to select the second battery module Specifically, in some embodiments, the second battery module is selected according to the rated voltage of the cooling system, then the second battery module is obtained based on the rated voltage of the first battery module and the cooling system, The output voltage of the second battery module is greater than or equal to the rated voltage of the cooling system.
  • the output voltage of the high-voltage circuit formed by the second battery module can ensure the normal operation of the cooling system. For example, the battery modules without thermal runaway are the No.
  • the module is a second battery module.
  • the second battery module is selected according to the rated power of the cooling system, then the second battery module is obtained based on the rated power of the first battery module and the cooling system, and the first battery module is obtained.
  • the output power of the two battery modules is greater than or equal to the rated power of the cooling system.
  • the output power of the high-voltage circuit formed by the second battery module can ensure the normal operation of the cooling system.
  • the battery modules without thermal runaway are the No. 1 battery module, the No. 3 battery module and the No. 4 battery module. If the output power of the series circuit formed by the No. 1 battery module and the No. 4 battery module is greater than the rated power of the cooling system, the No. 1 battery module and the No. 4 battery module can be selected as the second battery module.
  • the second battery module is selected based on the rated voltage of the cooling system and the temperature of the batteries in the power battery pack, or the second battery module is selected based on the rated voltage of the cooling system and the temperature of the cooling liquid, and no heat is generated.
  • the runaway battery module can form multiple high-voltage circuits, and the output voltages of the multiple high-voltage circuits are all greater than the rated voltage of the cooling system, then the second battery module is selected based on the temperature of the battery in the power battery pack or the temperature of the coolant.
  • the battery module with higher output power is selected as the second battery module, and when the battery temperature is lower than the first cooling temperature threshold.
  • the battery modules without thermal runaway are the No. 1 battery module, the No. 3 battery module and the No. 4 battery module. If the output voltage of the power supply circuit formed by the No. 1 battery module and the No.
  • the output power is P1
  • the output voltage of the power supply circuit formed by the No. 1 battery module and the No. 4 battery module is also greater than the rated voltage of the cooling system, the output power is P2, and P1 is greater than P2, then according to The temperature of the battery in the power battery pack or the temperature of the cooling liquid selects the second battery module. If the temperature of the battery in the power battery pack is higher than the first battery temperature threshold or the temperature of the cooling liquid flowing out is higher than the first cooling temperature threshold, select the second battery module.
  • the 1st battery module and the 3rd battery module are the second battery modules, if the battery temperature is lower than the first battery temperature threshold and higher than the second battery temperature threshold or the temperature of the outflow coolant is lower than the first coolant temperature threshold And higher than the second coolant temperature threshold, the No. 1 battery module and the No. 4 battery module are selected as the second battery module.
  • the battery management system and the VCU exchange information with each other, and the battery management system selects the second battery module according to the selection strategy. Specifically, the battery management system receives the cooling system sent by the vehicle control unit (VCU). and then obtain the second battery module based on the rated voltage of the cooling system and the first battery module.
  • VCU vehicle control unit
  • the rated voltage of the cooling system can be stored in the VCU in advance, the VCU sends the rated voltage to the battery management system, the battery management system obtains the rated voltage, and obtains the information of the first battery module, and then according to the rated voltage and the first battery group to obtain the second battery module, and the specific selection strategy is the same as the above-mentioned embodiment.
  • the sensor for detecting the temperature of the cooling liquid may also transmit the detected temperature of the cooling liquid to the VCU, and the VCU transmits the temperature of the cooling liquid together with the rated voltage of the cooling system to the battery management system, The battery management system then selects the second battery module according to the temperature of the cooling liquid and the rated voltage of the cooling system.
  • the senor for detecting the battery temperature of the power battery pack transmits the detected battery temperature to the battery management system
  • the VCU transmits the rated voltage of the cooling system to the battery management system
  • the battery management system transmits the battery temperature according to the battery temperature. and the rated voltage of the cooling system to select the second battery module.
  • S34 Use the second battery module to supply power to a cooling system, where the cooling system is used to cool the power battery pack.
  • a power supply circuit is formed between the second battery modules through a high-voltage wire harness to supply power to the cooling system. Specifically, it can supply power to the battery cooler in the cooling system, so that the cooling liquid can be forced to cool, and the water pump in the cooling system can be driven by other low-voltage electricity. , so that the coolant circulates in the battery pack, the cooling system can work normally in the case of thermal runaway in the power battery pack, cool the power battery pack, take away the heat generated by thermal runaway, and can force the cooling due to absorption
  • the cooling liquid heated by the heat of the battery thermal runaway greatly improves the cooling efficiency of the cooling liquid and improves the heat dissipation effect.
  • the thermal runaway processing method can use the second battery module without thermal runaway to supply power to the cooling system, so that the cooling system can work normally and take away power
  • the heat generated by the thermal runaway in the battery pack cools and dissipates the power battery pack to achieve a good heat dissipation effect, thereby improving the safety of the power battery pack.
  • the second battery module when acquiring the second battery module, it is also necessary to detect whether the power supply path that can be constructed by the second battery module is available, mainly based on the voltage difference or power of the power supply path of the second battery module to the second battery
  • the power supply path of the module is detected, specifically, if the voltage difference between the highest voltage terminal and the lowest voltage terminal of the power supply path of the second battery module is less than or equal to the first preset threshold; and/or, the The power of the power supply path of the second battery module is greater than the second preset threshold, and the second battery module is acquired.
  • the voltage difference of the power supply path of the second battery module when the voltage difference of the power supply path of the second battery module is normal and/or the power of the power supply path is normal, it indicates that the power supply path of the second battery module is available, and then the second battery module is obtained. If a certain high-voltage wiring harness between modules in the second battery module has an abnormality such as an open circuit, or if the second battery modules are connected through a switch unit, when a power supply path is formed, the control signal to the switch unit is abnormal. If the switch unit cannot be normally opened or closed, the voltage difference of the power supply path of the second battery module will be abnormal and/or the power of the power supply path will be abnormal, and the second battery module will be obtained again.
  • the switch unit that cannot be normally activated in the initial state that is, if the initial state of the switch unit is the off state, it will keep the off state all the time, and if the initial state of the switch unit is the closed state state, the closed state is always maintained, and then the second battery module is selected again according to the above selection strategy.
  • the switch units that cannot be normally activated in the initial state, and then shielding some switch units and battery modules that cannot be normally activated can improve the selection efficiency of re-selecting the second battery module.
  • FIG. 4 is a schematic flowchart of a thermal runaway processing method provided by an embodiment of the present application. As shown in FIG. 4 , the thermal runaway processing method includes:
  • the battery management system obtains battery parameters of each battery module of the plurality of battery modules, and the plurality of battery modules form a power battery pack;
  • the battery management system determines that thermal runaway occurs in the first battery module according to battery parameters of each battery module of the plurality of battery modules;
  • the battery management system sends first information to a vehicle control unit (VCU), where the first information includes information of the first battery module;
  • VCU vehicle control unit
  • the VCU generates second information based on the rated voltage of the cooling system and the information of the first battery module;
  • the battery management system acquires the second information sent by the VCU, where the second information includes information of the second battery module.
  • the battery management system uses the second battery module to supply power to a cooling system, and the cooling system is used for cooling the power battery pack.
  • the vehicle controller (VCU).
  • the battery management system and the VCU exchange information to jointly complete the step of obtaining the second battery module.
  • the battery management system sends first information to a vehicle control unit (VCU), where the first information includes information of the first battery module, so that the VCU is based on the rated voltage of the cooling system and all The information of the first battery module is returned, and second information is returned, and the second information includes the information of the second battery module.
  • the rated voltage of the cooling system can be stored in the VCU in advance.
  • the VCU After the VCU obtains the information of the first battery module sent to it by the battery management system, it obtains the second battery module based on the rated voltage of the cooling system and the information of the first battery module.
  • the selection strategy for selecting the second battery module is the same as the selection strategy for selecting the second battery module by the battery management system.
  • the first information may further include the battery temperature of the power battery pack or the temperature of the cooling liquid, so that the VCU selects the first information based on the rated voltage of the cooling system and the temperature of the battery, or based on the rated voltage of the cooling system and the temperature of the cooling liquid Two battery modules.
  • the battery management system and the VCU can exchange information with each other.
  • the VCU selects the second battery module according to the selection strategy, and then the battery management system uses the second battery module to supply power to the cooling system to achieve a good heat dissipation effect. Improve the safety of the power battery pack.
  • the battery management system and the VCU exchange information with each other, and the VCU detects the power supply path of the second battery module to detect whether the power supply path is normal.
  • the battery management system sends the voltage difference between the highest voltage terminal and the lowest voltage terminal of the power supply path of the second battery module to the vehicle control unit (VCU), so that the VCU is based on the second battery
  • VCU vehicle control unit
  • the voltage difference between the highest voltage end and the lowest voltage end of the power supply path of the module returns the information of the second battery module, if the voltage difference between the highest voltage end and the lowest voltage end of the power supply path of the second battery module
  • the pressure difference is less than or equal to the first preset threshold, and the VCU returns the information of the second battery module. If the pressure difference is less than or equal to the first preset threshold, it means that the power supply path of the second battery module is normal, and then the battery management system obtains the information of the second battery module and uses the second battery module to supply power to the cooling system.
  • the information sent by the battery management system to the VCU is the power of the power supply path of the second battery module, and the VCU then returns the power to the second battery module based on the power of the power supply path of the second battery module If the power of the power supply path of the second battery module is greater than the second preset threshold, the VCU returns the information of the second battery module.
  • the power of the power supply path of the second battery module is greater than the second preset threshold, which means that the power supply path of the second battery module is normal, and then the battery management system obtains the information of the second battery module and uses the second battery module.
  • the group supplies power to the cooling system.
  • the battery management system sends the voltage difference of the power supply path of the second battery module or the power of the power supply path of the second battery module to the VCU, and the VCU determines whether the power supply path is normal. Return the information of the second battery module, so that the battery management system uses the second battery module to supply power to the cooling system. If it is abnormal, the VCU returns the abnormal information to the battery management system, and the battery management system or the VCU reselects the second battery module. .
  • the thermal runaway processing method can use the second battery module without thermal runaway to supply power to the cooling system, so that the cooling system can work normally and take away power
  • the heat generated by the thermal runaway in the battery pack cools and dissipates the power battery pack to achieve a good heat dissipation effect, thereby improving the safety of the power battery pack.
  • thermal runaway processing method In order to explain the thermal runaway processing method more clearly and comprehensively, the thermal runaway processing method will be described in detail below with reference to specific embodiments:
  • FIG. 5 is a schematic structural diagram of a power battery pack provided by an embodiment of the present application.
  • the power battery pack 200 includes a module 1 and a module 2 , a series-parallel circuit, and an inter-circuit relay K1 /K2/K3.
  • module 1 and module 2 represent a battery module composed of a single battery or several batteries in series and parallel mode, and there are not only series loops but also parallel loops between module 1 and module 2. This means that when the series circuit is disconnected due to thermal runaway of a battery in module 1, it is possible that the remaining safety batteries in the power battery pack 200 form a high-voltage safety circuit through switching settings between circuits.
  • Figure 5 shows a relatively simple series-parallel setting.
  • a multi-level series-parallel mode can be set according to the actual design requirements and the connection mode inside the module.
  • the series-parallel mode as shown in Figure 5 is set inside the module 1. . In this way, when the thermal runaway of the battery occurs at multiple points at the same time, there are still "alternative routes" to choose from.
  • the relay K2 and the relay K3 between the loops are active/passive circuit breaking/opening devices, which are controlled by the BMS and can be driven by current signal/air pressure/temperature, etc.
  • the first battery module with thermal runaway is determined, and then based on the selection strategy described in the above embodiment, the second battery module is obtained, and finally the relay is switched by switching the relay. Switching between circuits is performed to realize the power supply path of the second battery module, so as to ensure that the power battery pack 200 still has an available high-voltage safety circuit for cooling by the cooler.
  • the relay can be arranged on the connection circuit between modules or sub-modules, and can also be arranged at the output terminal of a single cell or a single module.
  • the power battery pack 200 includes a module 3, a module 4 and relays K4/K5/K6. Both the module 3 and the module 4 can provide 200V voltage.
  • the control relay K4 is closed, and the relay K5 and the relay K6 are disconnected to ensure that the power battery pack 200 can be used normally.
  • the BMS determines the thermal runaway phenomenon through the parameters of the battery module (including voltage/temperature/air pressure/communication signal, etc.), and the BMS determines the first battery module that has thermal runaway.
  • the BMS can output the relay switching strategy to the vehicle controller (VCU), the vehicle control The controller (VCU) controls the relay K6 to close, the relay K4 and the relay K5 to open according to the relay switching strategy, and disconnects the battery module that has thermal runaway, so that the battery module (module 4) that does not have thermal runaway forms a high-voltage safety circuit, BMS
  • the module 4 is used to supply power to the battery cooler in the cooling system 300.
  • the VCU turns on the water pump to circulate the coolant, and the battery cooler of the cooling system 300 forcibly cools the coolant, accelerating the interior of the power battery pack 200, especially when heat is generated. Heat dissipation in high temperature areas near runaway battery modules.
  • the power battery pack 200 includes a module 6 , a module 7 , a module 9 and a module 10 , wherein the module 6 , the module 7 , the module 9 and the module 10 can respectively provide 100V voltage, and the module 6 and module 7 can be connected in series to form module 5, which can provide 200V voltage to the outside, and module 9 and module 10 can be connected in series to form module 8, which can provide 200V voltage to the outside.
  • the power battery pack also includes relays K8/K9/K10/K11/ K12/K13/K14/K15/K16, by controlling the state of each relay, can form multiple high-voltage circuits.
  • relay K8 When the power battery pack 200 needs to be charged/discharged at 400V, relay K8, relay K11, relay K14 are closed, relay K9, relay K10, relay K12, relay K13, relay K15, and relay K16 are off.
  • the module 6, the module 7, the module 9 and the module 10 form a series circuit to ensure that the power battery pack 200 can be used normally and output a voltage of 400V normally.
  • the BMS judges a thermal runaway alarm through the collected signals (including voltage/temperature/air pressure/communication signals), and the BMS pre- Set the logic to capture the position of the thermally runaway battery, determine the first battery module (assuming that module 6 and module 9 are thermally runaway), and then use the pre-stored logic to determine that only the circuits where module 7 and module 10 are located are still in a safe state.
  • the BMS judges a thermal runaway alarm through the collected signals (including voltage/temperature/air pressure/communication signals), and the BMS pre- Set the logic to capture the position of the thermally runaway battery, determine the first battery module (assuming that module 6 and module 9 are thermally runaway), and then use the pre-stored logic to determine that only the circuits where module 7 and module 10 are located are still in a safe state.
  • two high-voltage safety circuits in the circuit namely, a 100V high-voltage safety circuit and a 200V high-voltage safety circuit.
  • the second battery module can be module 7 or module 10 or both module 7 and module 10. If the rated voltage of the cooling system is greater than 100V and less than 200V, the second battery module is module 7 and module 10. Therefore, based on the preset logic, the second battery module and its power supply path are obtained.
  • the BMS can output the relay switching strategy to the vehicle controller (VCU).
  • VCU vehicle controller
  • the relay K13, the relay K14, and the relay K16 are correspondingly disconnected to form a high-voltage safety circuit while disconnecting the high-voltage connection of other battery modules in the power battery pack 200.
  • the BMS outputs the signal to the vehicle controller (VCU), turns on the water pump, circulates the coolant, and at the same time uses the above-mentioned high-voltage safety circuit to supply power to the cooling system 300, turns on the battery cooler in the cooling system 300, and enforces cooling of the coolant to accelerate the battery Heat dissipation inside the package, especially in the high temperature area near the thermal runaway battery module.
  • VCU vehicle controller
  • the BMS judges the thermal runaway alarm through the collected signals (including voltage/temperature/air pressure/communication signals), and the BMS uses the preset logic to perform thermal runaway.
  • the position of the out-of-control battery module is captured to determine that module 7 is thermally out of control (at this time, module 6, module 7 and module 9 are the first battery module), and the pre-stored logic determines that only the circuit where module 10 is located is still in a safe state (at this time
  • the module 10 is the second battery module).
  • there is still the possibility of constructing a high-voltage safety circuit in the circuit that is, a 100V high-voltage safety circuit.
  • BMS outputs relay switching strategy to vehicle controller (VCU), vehicle controller (VCU) controls relay K10, relay K15 to close, relay K8, relay K9, relay K11, relay K12, relay K13, relay K14, relay K16 Corresponding to disconnection, while disconnecting the high-voltage connection of the power battery pack 200, another high-voltage safety circuit is formed.
  • VCU vehicle controller
  • the BMS outputs the signal to the vehicle controller (VCU), turns on the water pump, circulates the coolant, and uses the above-mentioned high-voltage safety circuit to supply power to the battery cooler in the battery cooling system 300, turns on the battery cooler, and forces the coolant to cool down and accelerate the The heat dissipation inside the power battery pack 200, especially in the high temperature area near the thermal runaway battery module.
  • VCU vehicle controller
  • the thermal runaway processing method can use the second battery module without thermal runaway to supply power to the cooling system, so that the cooling system can work normally and take away power
  • the heat generated by the thermal runaway in the battery pack cools and dissipates the power battery pack to achieve a good heat dissipation effect, thereby improving the safety of the power battery pack.
  • the thermal runaway processing device 800 includes an acquisition module 801 for acquiring battery parameters of each battery module of a plurality of battery modules. A plurality of battery modules form a power battery pack; a processing module 802 is used to determine that thermal runaway occurs in the first battery module according to battery parameters of each battery module of the plurality of battery modules; the processing module 802 is further for obtaining a second battery module based on the first battery module, where the second battery module is at least one battery module in the power battery pack except the first battery module; the processing The module 802 is further configured to use the second battery module to supply power to a cooling system, and the cooling system is configured to cool the power battery pack.
  • the thermal runaway processing device when thermal runaway occurs in a battery module in the power battery pack, can use the second battery module without thermal runaway to supply power to the cooling system, so that the cooling system can work normally.
  • the heat generated by thermal runaway in the power battery pack is taken away, and the power battery pack is cooled and dissipated to achieve a good heat dissipation effect, thereby improving the safety of the power battery pack.
  • the processing module 802 is configured to: obtain the second battery module based on the rated voltage of the first battery module and the cooling system, and the output voltage of the second battery module greater than or equal to the rated voltage of the cooling system.
  • the processing module 802 is configured to: send first information to a vehicle control unit (VCU), where the first information includes information of the first battery module, so that the VCU is based on the the rated voltage of the cooling system and the information of the first battery module to generate second information;
  • VCU vehicle control unit
  • the processing module 802 is configured to: obtain the rated voltage of the cooling system sent by a vehicle control unit (VCU); obtain the rated voltage of the cooling system and the first battery module based on the rated voltage of the cooling system and the first battery module the second battery module.
  • VCU vehicle control unit
  • the processing module 802 is configured to: if the voltage difference between the highest voltage terminal and the lowest voltage terminal of the power supply path of the second battery module is less than or equal to a first preset threshold; and/or , the power of the power supply path of the second battery module is greater than the second preset threshold, and the second battery module is obtained.
  • the processing module 802 is used to:
  • the vehicle control unit Sending the voltage difference between the highest voltage terminal and the lowest voltage terminal of the power supply path of the second battery module to the vehicle control unit, so that the vehicle control unit returns to the second battery module based on the pressure difference information of the group, if the pressure difference is less than or equal to the first preset threshold, the vehicle control unit returns the information of the second battery module; obtains the information of the second battery module.
  • the battery parameters include: the real-time voltage of the battery module; the processing module 802 is configured to: if the difference between the real-time voltage of the first battery module and the reference voltage is greater than or equal to a third A preset threshold; and/or, the real-time voltage change rate of the battery module is greater than or equal to a fourth preset threshold; and/or, the real-time voltage sampling of the battery module is abnormal, then determine the first battery module The group experienced thermal runaway.
  • thermal runaway processing device and the thermal runaway processing method in the above-mentioned embodiments are based on the same inventive concept, the corresponding contents in the above-mentioned method embodiments are also applicable to the device embodiments, and details are not repeated here. described.
  • the thermal runaway processing device can use the second battery module without thermal runaway to supply power to the cooling system, so that the cooling system can work normally and take away the internal factors of the power battery pack.
  • the heat generated by thermal runaway cools and dissipates the power battery pack to achieve a good heat dissipation effect, thereby improving the safety of the power battery pack.
  • Embodiments of the present application further provide a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by one or more processors, such as One processor 101 in FIG. 2 can enable the above-mentioned one or more processors to execute the thermal runaway processing method in any of the above-mentioned method embodiments.
  • Embodiments of the present application further provide a computer program product
  • the computer program product includes a computer program stored on a non-transitory computer-readable storage medium
  • the computer program includes program instructions, and when the program instructions are controlled by the control unit When executing, the control unit is made to execute any one of the thermal runaway processing methods.
  • each embodiment can be implemented by means of software plus a general hardware platform, and certainly can also be implemented by hardware.
  • the computer program can be stored in a non-transitory computer readable
  • the computer program includes program instructions, and when the program instructions are executed by the UAV, the UAV can be made to execute the processes of the embodiments of the above methods.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM) or the like.
  • the above product can execute the thermal runaway processing method provided by the embodiments of the present application, and has functional modules and beneficial effects corresponding to executing the thermal runaway processing method.
  • the thermal runaway processing method provided in the embodiment of the present application.

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Abstract

本申请实施例提供一种热失控处理方法、装置、系统及存储介质，该方法首先获取动力电池包内的多个电池模组的每一个电池模组的电池参数，再根据多个电池模组的每一个电池模组的电池参数确定第一电池模组出现热失控，然后基于第一电池模组，获取第二电池模组，其中，第二电池模组为动力电池包中除开第一电池模组的至少一个电池模组，最后利用第二电池模组为冷却系统供电。因此，当动力电池包内有电池模组发生热失控时，该热失控处理方法可以利用未发生热失控的第二电池模组为冷却系统供电，使得冷却系统正常工作，带走动力电池包内因热失控而产生的热量，对动力电池包进行降温和散热，达到很好的散热效果，进而提升动力电池包的安全性。

Description

一种热失控处理方法、装置、系统及存储介质
相关申请的交叉引用
本申请要求享有于2020年12月31日提交的名称为“一种热失控处理方法、装置、系统及存储介质”的中国专利申请202011626769.6的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池散热领域，特别是涉及一种热失控处理方法、装置、系统及存储介质。
背景技术
电池热失控是指动力电池因某些原因出现了不可控的链式分解反应，导致内部温度急剧升高，最终导致电芯失效，同时伴随大量产气及产热的现象。造成热失控的原因包括但不限于机械碰撞、内短路、过充、过热等。
电池发生热失控后，因绝缘受热失效及电池热失控后喷发的可导金属碎屑的影响，电池包内会频繁产生高压打火的情况，进而带来电池包上盖击穿、过流温升、电芯击穿失效等风险，使得电池包内发生剧烈的热蔓延，产生大量的热，电池包温度急剧上升，使得电池包安全性较差。
而当发生热失控时，目前的电池包内的系统高压回路会被动切断，导致冷却系统无法正常工作，无法对电池包进行有效地降温和散热，导致电池包安全性降低。
发明内容
本申请实施例至少在一定程度上解决上述技术问题之一，为此本申请提供一种热失控处理方法、装置、系统及存储介质，其能够利用未发生热失控的电池模组为冷却系统供电，使得冷却系统为整个动力电池包进行降温和散热，带走因热失控而产生 的热量，达到较好的散热效果，提升动力电池包的安全性。
第一方面，本申请实施例提供一种热失控处理方法，包括：
获取多个电池模组的每一个电池模组的电池参数，所述多个电池模组组成动力电池包；
根据所述多个电池模组的每一个电池模组的电池参数确定第一电池模组出现热失控；
基于所述第一电池模组，获取第二电池模组，所述第二电池模组为所述动力电池包中除开所述第一电池模组的至少一个电池模组；
利用所述第二电池模组为冷却系统供电，所述冷却系统用于为所述动力电池包降温。
在一些实施例中，所述基于所述第一电池模组，获取第二电池模组，包括：
基于所述第一电池模组和所述冷却系统的额定电压，获取所述第二电池模组，所述第二电池模组的输出电压大于或等于所述冷却系统的额定电压。
在一些实施例中，所述基于所述第一电池模组，获取第二电池模组，包括：
向整车控制单元(VCU)发送第一信息，所述第一信息包括所述第一电池模组的信息，以使所述VCU基于所述冷却系统的额定电压以及所述第一电池模组的信息，生成第二信息；
获取所述VCU发送的所述第二信息，所述第二信息包括所述第二电池模组的信息。
在一些实施例中，所述基于所述第一电池模组，获取第二电池模组，包括：
获取整车控制单元(VCU)发送的所述冷却系统的额定电压；
基于所述冷却系统的额定电压以及所述第一电池模组，获取所述第二电池模组。
在一些实施例中，所述基于所述第一电池模组，获取第二电池模组，包括：
若所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差小于或等于第一预设阈值；和/或，
所述第二电池模组的供电通路的功率大于第二预设阈值，则获取所述第二电池模组。
在一些实施例中，所述基于所述第一电池模组，获取第二电池模组，包括：
向整车控制单元(VCU)发送所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差，以使所述VCU基于所述压差返回所述第二电池模组的信息，若所述压差小于或等于第一预设阈值，所述VCU返回所述第二电池模组的信息；
获取所述第二电池模组的信息。
在一些实施例中，所述电池参数包括：所述电池模组的实时电压；
所述根据所述多个电池模组的每一个电池模组的电池参数确定第一电池模组出现热失控，包括：
若所述第一电池模组的实时电压与基准电压差值大于或等于第三预设阈值；和/或，
所述电池模组的实时电压变化速率大于或等于第四预设阈值；和/或，
所述电池模组的实时电压采样异常，则确定所述第一电池模组出现热失控。
第二方面，本申请实施例提供一种热失控处理装置，所述热失控处理装置包括：
获取模块，用于获取多个电池模组的每一个电池模组的电池参数，所述多个电池模组组成动力电池包；
处理模块，用于根据所述多个电池模组的每一个电池模组的电池参数确定第一电池模组出现热失控；
所述处理模块，还用于基于所述第一电池模组，获取第二电池模组，所述第二电池模组为所述动力电池包中除开所述第一电池模组的至少一个电池模组；
所述处理模块，还用于利用所述第二电池模组为冷却系统供电，所述冷却系统用于为所述动力电池包降温。
在一些实施例中，所述处理模块用于：
基于所述第一电池模组和所述冷却系统的额定电压，获取所述第二电池模组，所述第二电池模组的输出电压大于或等于所述冷却系统的额定电压。
在一些实施例中，所述处理模块用于：
向整车控制单元(VCU)发送第一信息，所述第一信息包括所述第一电池模组的信息，以使所述VCU基于所述冷却系统的额定电压以及所述第一电池模组的信息，生成第二信息；
获取所述VCU发送的所述第二信息，所述第二信息包括所述第二电池模组的 信息。
在一些实施例中，所述处理模块用于：
获取整车控制单元(VCU)发送的所述冷却系统的额定电压；
基于所述冷却系统的额定电压以及所述第一电池模组，获取所述第二电池模组。
在一些实施例中，所述处理模块用于：
若所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差小于或等于第一预设阈值；和/或，
所述第二电池模组的供电通路的功率大于第二预设阈值，则获取所述第二电池模组。
在一些实施例中，所述处理模块用于：
向整车控制单元(VCU)发送所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差，以使所述VCU基于所述压差返回所述第二电池模组的信息，若所述压差小于或等于第一预设阈值，所述VCU返回所述第二电池模组的信息；
获取所述第二电池模组的信息。
在一些实施例中，所述电池参数包括：所述电池模组的实时电压；所述处理模块用于：
若所述第一电池模组的实时电压与基准电压差值大于或等于第三预设阈值；和/或，
所述电池模组的实时电压变化速率大于或等于第四预设阈值；和/或，
所述电池模组的实时电压采样异常，则确定所述第一电池模组出现热失控。
第三方面，本申请实施例提供一种电池管理系统，所述电池管理系统包括：
至少一个处理器；以及，
与所述至少一个处理器通信连接的存储器；
所述存储器存储有可被所述至少一个处理器执行的指令，所述指令被所述至少一个处理器执行，以使所述至少一个处理器能够执行如上所述的热失控处理方法。
第四方面，本申请实施例提供一种非暂态计算机可读存储介质，所述非暂态计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于执行如上所述的热失控处理方法。
第五方面，本申请实施例提供一种热失控处理系统，所述热失控处理系统包括如上所述的电池管理系统。
本申请与现有技术相比至少具有以下有益效果：本申请中的热失控处理方法，该热失控处理方法包括首先获取动力电池包内的多个电池模组的每一个电池模组的电池参数，再根据多个电池模组的每一个电池模组的电池参数确定第一电池模组出现热失控，然后基于第一电池模组，获取第二电池模组，其中，第二电池模组为动力电池包中除开第一电池模组的至少一个电池模组，最后利用第二电池模组为冷却系统供电。因此，当动力电池包内有电池模组发生热失控时，该热失控处理方法可以利用未发生热失控的第二电池模组为冷却系统供电，使得冷却系统正常工作，带走动力电池包内因热失控而产生的热量，对动力电池包进行降温和散热，达到很好的散热效果，进而提升动力电池包的安全性。
附图说明
一个或多个实施例通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定，附图中具有相同参考数字标号的元件表示为类似的元件，除非有特别申明，附图中的图不构成比例限制。
图1是本申请实施例提供的一种热失控处理系统的结构示意图；
图2是本申请实施例提供的一种电池管理系统硬件结构示意图；
图3是本申请实施例提供的一种热失控处理方法的流程示意图；
图4是本申请实施例提供的一种热失控处理方法的流程示意图；
图5是本申请实施例提供的一种动力电池包的结构示意图；
图6是本申请另一实施例提供的一种动力电池包的结构示意图；
图7是本申请另一实施例提供的一种动力电池包的结构示意图；
图8是本申请实施例提供的一种热失控处理装置的结构示意图；
在附图中，附图并未按照实际的比例绘制。
标记说明：热失控处理系统100；电池管理系统10；处理器101；存储器102；整车控制器20；动力电池包200；冷却系统300；热失控处理装置800；获取模块801；处理模块802。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明的是，如果不冲突，本申请实施例中的各个特征可以相互结合，均在本申请的保护范围之内。另外，虽然在装置示意图中进行了功能模块划分，在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于装置中的模块划分，或流程图中的顺序执行所示出或描述的步骤。再者，本申请所采用的“第一”、“第二”、“第三”等字样并不对数据和执行次序进行限定，仅是对功能和作用基本相同的相同项或相似项进行区分。
请参阅图1，图1是本申请实施例提供的一种热失控处理系统，该热失控处理系统100包括电池管理系统10(Battery Management System，简称BMS)，该热失控处理系统100用于在动力电池包200发生热失控时，通过该动力电池包200为冷却系统300供电，进而对该动力电池包200进行冷却降温。其中，动力电池包200内包括多个电池模组，每一个电池模组均与电池管理系统10通信连接，动力电池包200内的电池模组可形成多种供电回路。
在动力电池包200正常时，多个电池模组之间通过高压线束串联或并联形成动力电池系统，向其他部件提供高压电。当动力电池包200内的单个电池模组或多个电池模组即将发生或者已经发生热失控时，电池管理系统10可根据电池模组的电池参数识别到该热失控现象，进而确定第一电池模组发生热失控，再屏蔽发生热失控的电池模组，获取第二电池模组，第二电池模组为动力电池包200中除开第一电池模组的至少一个电池模组，利用未发生热失控的电池模组，即第二电池模组形成高压供电回路，为冷却系统300进行供电，进而启动冷却系统300为动力电池包200进行降温散热。
冷却系统300包括水泵和电池冷却器(chiller)，其中，水泵可由低压系统(12V)供电，水泵开启以后，循环冷却液，冷却液进入动力电池包200内的冷板后对其进行降温，达到一定的散热效果，而电池冷却器由未发生热失控的电池模组形成的高压回路进行供电，从而驱动电池冷却器正常工作，在电池冷却器内部一侧通入制冷 剂，一侧通入冷却液，两者在电池冷却器内充分换热，冷却液中的热量被制冷剂带走，冷水后的冷却液流出电池冷却器再流入动力电池包内，对其进行散热，形成一个循环。电池冷却器能够对冷却液进行强制冷却，大大提高冷却液的冷却效率，迅速带走动力电池包200的内部热量，相对于没有高压回路对冷却系统300供电的方案，该热失控处理系统100能够利用未发生热失控的电池模组为冷却系统300供电，大大提高冷却液的冷却效率，提高冷却系统300对动力电池包200的散热效果，提升动力电池包200的安全性。
在一些实施例中，该热失控处理系统100还包括整车控制器20(Vehicle Control Unit，简称VCU)，VCU20与电池管理系统10通信连接，电池管理系统10可将每个电池模组的电池参数传送至VCU20，由VCU20进行处理和分析，确定发生热失控的电池模组，即确定第一电池模组，还可基于热失控的电池模组和冷却系统的额定电压，获取第二电池模组，即获取未发生热失控的电池模组，将未发生热失控的电池模组信息传送至电池管理系统10，由电池管理系统10利用第二电池模组为冷却系统300供电，对动力电池包200实现很好的降温散热效果，提升动力电池包200的安全性。
在另一些实施例中，电池管理系统10可获取VCU20发送的冷却系统300的额定电压，再基于冷却系统300的额定电压以及第一电池模组，获取第二电池模组，即获取未发生热失控的电池模组，电池管理系统10再利用第二电池模组为冷却系统300供电，使得冷却系统300对动力电池包200进行降温散热。
综上，该热失控处理系统可以利用未发生热失控的第二电池模组为冷却系统供电，使得冷却系统正常工作，带走动力电池包内因热失控而产生的热量，对动力电池包进行降温和散热，达到很好的散热效果，进而提升动力电池包的安全性。
请参阅图2，电池管理系统10内可以设置有：通过系统总线或者其他方式通信连接的至少一个处理器101(图2中以一个处理器为例)和存储器102。
其中，所述处理器101用于提供计算和控制能力，以控制所述电池管理系统完成热失控处理以及执行相关任务，例如，控制所述电池管理系统10执行下述实施例提供的任意一种热失控处理方法。
所述存储器102作为一种非暂态计算机可读存储介质，可用于存储非暂态软件程序、非暂态性计算机可执行程序以及模块，如下述实施例的热失控处理方法对应的程序指令/模块。所述处理器101通过运行存储在存储器102中的非暂态软件程序、指 令以及模块，可以实现下述任一方法实施例中的热失控处理方法。具体地，所述存储器102可以包括高速随机存取存储器，还可以包括非暂态存储器，例如至少一个磁盘存储器件、闪存器件、或其他非暂态固态存储器件。
请参阅图3，图3是本申请实施例提供的一种热失控处理方法的流程示意图。该方法可以由任意类型的电池管理系统执行，比如，由图1所示的电池管理系统执行。
具体地，请参阅图3，该方法可以包括但不限于如下步骤：
S31：获取多个电池模组的每一个电池模组的电池参数，所述多个电池模组组成动力电池包；
所述动力电池包内包括多个电池模组，电池模组之间可用高压电线束串联或并联构成高压供电回路，每个电池模组的特性可用其电池参数进行表示，具体地，电池参数包括但不限于电池模组的实时电压、电池模组的实时输出电流/功率、电池模组的基准电压以及对电池模组进行采样的采样信号等，其中，每个电池模组均包括n个电芯，每个电芯均具有电芯基准电压、电芯实时电压等电芯参数，n个电芯的总电压构成该电池模组的电压，因此，电池模组的电池参数也可通过电池模组中的电芯参数来表示。
S32：根据所述多个电池模组的每一个电池模组的电池参数确定第一电池模组出现热失控；
当某个电池模组发生热失控时，其电池参数相对于基准值出现偏差，根据该偏差可确定电池模组发生了热失控现象，具体地，若所述第一电池模组的实时电压与基准电压差值大于或等于第三预设阈值；和/或，所述电池模组的实时电压变化速率大于或等于第四预设阈值；和/或，所述电池模组的实时电压采样异常，则确定所述第一电池模组出现热失控。其中，基准电压为电池模组热失控之前的电压，电池模组的实时电压采样异常可指对电池模组进行电压采样的传感器通讯异常，第三预设阈值与第四预设阈值均可根据需要而设置。
在另一些实施例中，还可根据电池模组中的电芯参数确定发生热失控的第一电池模组，对电池模组中的每一个电芯均进行相应的识别，若某一个电芯存在异常，则确定包含该电芯的电池模组发生热失控，具体地，若电芯的实时电压与电芯基准电压差值大于或等于设定阈值，和/或电芯的实时电压变化速率大于或等于设定阈值，和/ 或电芯对应位置的电压采样传感器通信异常，和/或包含该电芯的电池模组总压与n*V1(n为电池模组内包含电芯数量，V1为电芯基准电压)差值大于设定阈值，则确定该电池模组发生热失控。
第一电池模组中包含的电池模组的数量为所有发生热失控的电池模组的数量，若动力电池包内1号电池模组发生热失控，则第一电池模组只包括该1号电池模组，若动力电池包内1号电池模组、3号电池模组以及4号电池模组均发生热失控，则第一电池模组包括1号电池模组、3号电池模组以及4号电池模组。
S33：基于所述第一电池模组，获取第二电池模组，所述第二电池模组为所述动力电池包中除开所述第一电池模组的至少一个电池模组；
第二电池模组为未发生热失控的电池模组中的部分电池模组甚至全部电池模组，基于一定的选取策略，从动力电池包内未发生热失控的电池模组中选取出第二电池模组，第二电池模组可通过串并联方式构成高压安全供电回路为冷却系统供电。
选取策略可包括多种策略，例如，基于冷却系统的额定电压和/或额定功率和/或额定电流等，还可基于冷却系统中冷却液的温度，或是基于动力电池包内的电池温度等条件进行选取第二电池模组。具体地，在一些实施例中，根据冷却系统的额定电压进行选取第二电池模组，则基于所述第一电池模组和所述冷却系统的额定电压，获取所述第二电池模组，所述第二电池模组的输出电压大于或等于所述冷却系统的额定电压。第二电池模组可构成的高压回路的输出电压能够保证冷却系统的正常工作，例如：未发生热失控的电池模组为1号电池模组、3号电池模组以及4号电池模组，而只有1号电池模组、3号电池模组以及4号电池模组构成的串联回路的输出电压大于冷却系统的额定电压，则选取1号电池模组、3号电池模组以及4号电池模组为第二电池模组。
在一些实施例中，根据冷却系统的额定功率进行选取第二电池模组，则基于所述第一电池模组和所述冷却系统的额定功率，获取所述第二电池模组，所述第二电池模组的输出功率大于或等于所述冷却系统的额定功率。第二电池模组可构成的高压回路的输出功率能够保证冷却系统的正常工作，例如：未发生热失控的电池模组为1号电池模组、3号电池模组以及4号电池模组，而1号电池模组以及4号电池模组构成的串联回路的输出功率大于冷却系统的额定功率，则可选取1号电池模组以及4号电池模组为第二电池模组。
在另一些实施例中，基于冷却系统的额定电压和动力电池包内的电池温度选取第二电池模组，或基于冷却系统的额定电压和冷却液的温度选取第二电池模组，未发生热失控的电池模组可构成多条高压回路，且多条高压回路的输出电压均大于冷却系统的额定电压，则再基于动力电池包内的电池温度或冷却液的温度选取第二电池模组，具体地，当电池温度高于第一电池温度阈值或流出的冷却液温度高于第一冷却温度阈值，则选取输出功率较高的电池模组为第二电池模组，当电池温度低于第一电池温度阈值且高于第二电池温度阈值或流出的冷却液温度低于第一冷却液温度阈值且高于第二冷却液温度阈值，则选取输出功率较低的电池模组为第二电池模组。例如：未发生热失控的电池模组为1号电池模组、3号电池模组以及4号电池模组，若1号电池模组和3号电池模组构成的供电回路的输出电压大于冷却系统的额定电压，输出功率为P1，且1号电池模组和4号电池模组构成的供电回路的输出电压同样大于冷却系统的额定电压，输出功率为P2，且P1大于P2，则再根据动力电池包内的电池温度或冷却液的温度选取第二电池模组，若动力电池包内的电池温度高于第一电池温度阈值或流出的冷却液温度高于第一冷却温度阈值，则选取1号电池模组和3号电池模组为第二电池模组，若电池温度低于第一电池温度阈值且高于第二电池温度阈值或流出的冷却液温度低于第一冷却液温度阈值且高于第二冷却液温度阈值，则选取1号电池模组和4号电池模组为第二电池模组。
在一些实施例中，电池管理系统和VCU互相交互信息，再由电池管理系统根据选取策略选择第二电池模组，具体地，电池管理系统接收整车控制单元(VCU)发送的所述冷却系统的额定电压，再基于所述冷却系统的额定电压以及所述第一电池模组，获取所述第二电池模组。
冷却系统的额定电压可预先存储于VCU，VCU向电池管理系统发送该额定电压，电池管理系统获取到该额定电压，且获取第一电池模组的信息，再根据该额定电压和第一电池模组，获取第二电池模组，具体的选取策略同上述实施例。
在一些实施例中，用于检测冷却液的温度的传感器，也可将检测到的冷却液的温度传送至VCU，由VCU将冷却液的温度和冷却系统的额定电压共同传送至电池管理系统，使得电池管理系统再根据冷却液的温度和冷却系统的额定电压选取第二电池模组。
在一些实施例中，用于检测动力电池包的电池温度的传感器，将检测到的电池 温度传送至电池管理系统，VCU将冷却系统的额定电压传送至电池管理系统，由电池管理系统根据电池温度和冷却系统的额定电压选取第二电池模组。
S34：利用所述第二电池模组为冷却系统供电，所述冷却系统用于为所述动力电池包降温。
第二电池模组之间通过高压线束构成供电回路，为冷却系统供电，具体可为冷却系统中的电池冷却器进行供电，使得冷却液能够被强制制冷，冷却系统中的水泵可由其他低压电驱动，使得冷却液在电池包内循环起来，冷却系统在动力电池包内发生热失控的情况下能够正常工作，为动力电池包降温，带走因热失控而产生的热量，且能够强制制冷因吸收电池热失控的热量而升温的冷却液，大大提高冷却液的冷却效率，提高散热效果。
综上所述，当动力电池包内有电池模组发生热失控时，该热失控处理方法可以利用未发生热失控的第二电池模组为冷却系统供电，使得冷却系统正常工作，带走动力电池包内因热失控而产生的热量，对动力电池包进行降温和散热，达到很好的散热效果，进而提升动力电池包的安全性。
在一些实施例中，在获取第二电池模组时，还需检测第二电池模组可构建的供电通路是否可用，主要基于第二电池模组的供电通路的压差或功率对第二电池模组的供电通路进行检测，具体地，若所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差小于或等于第一预设阈值；和/或，所述第二电池模组的供电通路的功率大于第二预设阈值，则获取所述第二电池模组。
即第二电池模组的供电通路压差正常和/或供电通路功率正常时，表征该第二电池模组的供电通路可用，再获取该第二电池模组。若第二电池模组中模组之间的某个高压线束出现断路等异常，或者若第二电池模组之间通过开关单元连接，在构成供电通路时，对开关单元的控制信号发生异常，导致开关单元无法正常断开或闭合，则均会导致第二电池模组的供电通路的压差异常和/或供电通路的功率异常，则再重新获取第二电池模组。
在重新获取第二电池模组之前，将无法正常激活的开关单元保持为初始状态，即，若该开关单元初始状态为断开状态，则一直保持断开状态，若该开关单元初始状态为闭合状态，则一直保持闭合状态，然后再重新根据上述选取策略选取第二电池模组。将无法正常激活的开关单元保持为初始状态，进而屏蔽一些无法正常激活的开关 单元和电池模组，可提高重新选取第二电池模组的选取效率。
若由VCU完成选取第二电池模组的步骤，请参阅图4，图4是本申请实施例提供的一种热失控处理方法的流程示意图，如图4所示，该热失控处理方法包括：
S41：电池管理系统获取多个电池模组的每一个电池模组的电池参数，所述多个电池模组组成动力电池包；
S42：电池管理系统根据所述多个电池模组的每一个电池模组的电池参数确定第一电池模组出现热失控；
S43：电池管理系统向整车控制单元(VCU)发送第一信息，所述第一信息包括所述第一电池模组的信息；
S44：VCU基于所述冷却系统的额定电压以及所述第一电池模组的信息，生成第二信息；
S45：电池管理系统获取VCU发送的所述第二信息，所述第二信息包括所述第二电池模组的信息。
S46：电池管理系统利用所述第二电池模组为冷却系统供电，所述冷却系统用于为所述动力电池包降温。
基于第一电池模组，获取第二电池模组的部分过程由整车控制器(VCU)完成，电池管理系统与VCU进行信息交互，共同完成获取第二电池模组的步骤。具体地，电池管理系统向整车控制单元(VCU)发送第一信息，所述第一信息包括所述第一电池模组的信息，以使所述VCU基于所述冷却系统的额定电压以及所述第一电池模组的信息，返回第二信息，所述第二信息包括所述第二电池模组的信息。冷却系统的额定电压可预先存储于VCU，VCU再获取到电池管理系统向其发送的第一电池模组的信息后，则基于冷却系统的额定电压和第一电池模组的信息，获取第二电池模组，选取第二电池模组的选取策略与电池管理系统选取第二电池模组的选取策略相同。
在一些实施例中，第一信息还可包括动力电池包的电池温度或冷却液的温度，使得VCU基于冷却系统的额定电压和电池温度，或基于冷却系统的额定电压和冷却液的温度选取第二电池模组。
因此，电池管理系统和VCU之间可以互相交互信息，由VCU根据选取策略选取第二电池模组，再由电池管理系统利用第二电池模组为冷却系统供电，以达到很好的散热效果，提升动力电池包的安全性。
在一些实施例中，在对第二电池模组的通电回路进行检测时，电池管理系统和VCU互相交互信息，由VCU对第二电池模组的供电通路进行检测，检测该供电通路是否正常，具体地，电池管理系统向整车控制单元(VCU)发送所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差，以使所述VCU基于所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差返回所述第二电池模组的信息，若所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差小于或等于第一预设阈值，所述VCU返回所述第二电池模组的信息。所述压差小于或等于第一预设阈值，则代表第二电池模组的供电通路正常，然后电池管理系统再获取第二电池模组的信息，利用第二电池模组为冷却系统供电。
在另一些实施例中，电池管理系统向VCU发送的信息为所述第二电池模组的供电通路的功率，VCU再基于所述第二电池模组的供电通路的功率返回第二电池模组的信息，若所述第二电池模组的供电通路的功率大于第二预设阈值，所述VCU返回所述第二电池模组的信息。所述第二电池模组的供电通路的功率大于第二预设阈值，则代表第二电池模组的供电通路正常，然后电池管理系统再获取第二电池模组的信息，利用第二电池模组为冷却系统供电。
因此，电池管理系统将第二电池模组的供电通路的压差或第二电池模组的供电通路的功率发送至VCU，由VCU判断该供电通路是否正常，若正常，VCU则向电池管理系统返回第二电池模组的信息，使得电池管理系统利用第二电池模组为冷却系统供电，若异常，VCU则向电池管理系统返回异常信息，由电池管理系统或者VCU重新选取第二电池模组。
综上所述，当动力电池包内有电池模组发生热失控时，该热失控处理方法可以利用未发生热失控的第二电池模组为冷却系统供电，使得冷却系统正常工作，带走动力电池包内因热失控而产生的热量，对动力电池包进行降温和散热，达到很好的散热效果，进而提升动力电池包的安全性。
为了更加清楚和全面的阐述热失控处理方法，下面结合具体实施例对该热失控处理方法进行详细描述：
请参阅图5，图5是本申请实施例提供的一种动力电池包的结构示意图，如图5所示，动力电池包200内包含有模块1和模块2、串并联回路以及回路间继电器K1/K2/K3。其中，模块1及模块2代表单个电池或几个电池通过串并联方式组成的电 池模组，模块1与模块2之间不仅有串联回路还有并联回路。这意味着当模块1中因某个电池热失控导致串联回路断开时，通过回路间的切换设置，使得动力电池包200中的剩余安全电池组成高压安全回路存在可能性。图5所示为较为简单的串并联设置，实际情况中可以根据实际设计需求及模块内部的连接方式，设置多级的串并联方式，如在模块1内部设置如图5所示的串并联方式。如此可实现当多点同时出现电池热失控情况时，仍有“备选路线”可供选择。
回路间的继电器K2和继电器K3为主动/被动式的回路断开/开启装置，受BMS管控，可通过电流信号/气压/温度等进行驱动。当动力电池包200中识别到某一处出现电池热失控状态，确定发生热失控的第一电池模组，再基于上述实施例所述的选取策略，获取第二电池模组，最后通过切换继电器进行回路间切换，实现第二电池模组的供电通路，保证动力电池包200仍存在可用的高压安全回路用于冷却器冷却。继电器可以设置在模块间或子模块间的连接电路上，也可设置在单体电芯或单体模组的输出端子处。
具体地，若动力电池包200如图6所示，该动力电池包200包括模块3、模块4以及继电器K4/K5/K6，模块3和模块4均可提供200V电压，在正常使用情况下，当动力电池包200需要以400V进行充电/放电时，控制继电器K4闭合，继电器K5和继电器K6断开，保证动力电池包200能够正常使用。
当动力电池包200中出现单体电池热失控时，BMS通过电池模组的参数(包括电压/温度/气压/通讯信号等)判断出现热失控现象，BMS确定发生热失控的第一电池模组，假设第一电池模组为模块3，再通过预存逻辑获取第二电池模组，第二电池模组为模块4，则BMS可输出继电器切换策略到整车控制器(VCU)，整车控制器(VCU)根据继电器切换策略控制继电器K6闭合，继电器K4以及继电器K5断开，断开发生热失控的电池模组，使得未发生热失控的电池模组(模块4)形成高压安全回路，BMS利用模块4为冷却系统300中的电池冷却器进行供电，同时，VCU开启水泵，循环冷却液，冷却系统300的电池冷却器对冷却液进行强制冷却，加速动力电池包200内部，尤其是发生热失控的电池模组附近高温区的散热。
请参阅图7，如图7所示，该动力电池包200内包括模块6、模块7、模块9以及模块10，其中，模块6、模块7、模块9以及模块10分别可提供100V电压，模块6和模块7通过串联可形成模块5，向外提供200V电压，模块9和模块10通过串联可形 成模块8，向外提供200V电压，动力电池包内还包括继电器K8/K9/K10/K11/K12/K13/K14/K15/K16，通过控制各个继电器的状态，可形成多个高压回路。
正常使用情况下，当动力电池包200内需要以400V进行充电/放电时，继电器K8、继电器K11继电器K14处于闭合状态，继电器K9、继电器K10、继电器K12、继电器K13、继电器K15、继电器K16处于断开状态，模块6、模块7、模块9以及模块10形成串联回路，保证动力电池包200能够正常使用，正常输出400V电压。
当动力电池包200内出现单体电池模组或两个电池模组同时发生热失控时，BMS通过采集到的信号(包括电压/温度/气压/通讯信号)判断出现热失控报警，BMS通过预设逻辑进行热失控电池位置捕捉，确定第一电池模组(假设为模块6和模块9发生热失控)，再通过预存逻辑判断出仅限模块7及模块10所在电路仍处于安全状态。此时电路中存在构建两种高压安全回路的可能，即100V高压安全回路及200V高压安全回路。若冷却系统的额定电压小于100V，则第二电池模组可为模块7或模块10或模块7和模块10，若冷却系统的额定电压大于100V，小于200V，则第二电池模组为模块7和模块10。因此，基于预设逻辑，获取第二电池模组以及其供电通路。
若选取200V高压安全回路，BMS可输出继电器切换策略到整车控制器(VCU)，整车控制器(VCU)控制继电器K8、继电器K12、继电器K15对应闭合，继电器K9、继电器K10、继电器K11、继电器K13、继电器K14、继电器K16对应断开，断开动力电池包200内其他电池模组高压连接的同时，形成高压安全回路。
BMS输出信号到整车控制器(VCU)，开启水泵，循环冷却液，同时利用上述高压安全回路为冷却系统300供电，开启冷却系统300中的电池冷却器，对冷却液进行强制冷却，加速电池包内部，尤其是热失控电池模组附近高温区的散热。
若此时又出现某一电池模组发生热失控(假设为模块7)，BMS通过采集到的信号(包括电压/温度/气压/通讯信号)判断出现热失控报警，BMS通过预设逻辑进行热失控电池模组位置捕捉，确定模块7出现热失控(此时模块6、模块7以及模块9为第一电池模组)，通过预存逻辑判断出仅限模块10所在电路仍处于安全状态(此时模块10为第二电池模组)。此时电路中仍存在构建高压安全回路的可能，即100V高压安全回路。BMS输出继电器切换策略到整车控制器(VCU)，整车控制器(VCU)控制继电器K10、继电器K15对应闭合，继电器K8、继电器K9、继电器K11、继电器K12、继 电器K13、继电器K14、继电器K16对应断开，断开动力电池包200高压连接的同时，形成另一高压安全回路。
BMS输出信号到整车控制器(VCU)，开启水泵，循环冷却液，同时利用上述高压安全回路为电池冷却系统300中的电池冷却器供电，开启电池冷却器，对冷却液进行强制冷却，加速动力电池包200内部，尤其是热失控电池模组附近高温区的散热。
综上所述，当动力电池包内有电池模组发生热失控时，该热失控处理方法可以利用未发生热失控的第二电池模组为冷却系统供电，使得冷却系统正常工作，带走动力电池包内因热失控而产生的热量，对动力电池包进行降温和散热，达到很好的散热效果，进而提升动力电池包的安全性。
图8是本申请实施例提供的一种热失控处理装置的结构示意图，该热失控处理装置800包括获取模块801，用于获取多个电池模组的每一个电池模组的电池参数，所述多个电池模组组成动力电池包；处理模块802，用于根据所述多个电池模组的每一个电池模组的电池参数确定第一电池模组出现热失控；所述处理模块802，还用于基于所述第一电池模组，获取第二电池模组，所述第二电池模组为所述动力电池包中除开所述第一电池模组的至少一个电池模组；所述处理模块802，还用于利用所述第二电池模组为冷却系统供电，所述冷却系统用于为所述动力电池包降温。
因此，在本实施例中，当动力电池包内有电池模组发生热失控时，该热失控处理装置可以利用未发生热失控的第二电池模组为冷却系统供电，使得冷却系统正常工作，带走动力电池包内因热失控而产生的热量，对动力电池包进行降温和散热，达到很好的散热效果，进而提升动力电池包的安全性。
在一些实施例中，所述处理模块802用于：基于所述第一电池模组和所述冷却系统的额定电压，获取所述第二电池模组，所述第二电池模组的输出电压大于或等于所述冷却系统的额定电压。
在一些实施例中，所述处理模块802用于：向整车控制单元(VCU)发送第一信息，所述第一信息包括所述第一电池模组的信息，以使所述VCU基于所述冷却系统的额定电压以及所述第一电池模组的信息，生成第二信息；
获取所述整车控制单元发送的所述第二信息，所述第二信息包括所述第二电池模组的信息。
在一些实施例中，所述处理模块802用于：获取整车控制单元(VCU)发送的 所述冷却系统的额定电压；基于所述冷却系统的额定电压以及所述第一电池模组，获取所述第二电池模组。
在一些实施例中，所述处理模块802用于：若所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差小于或等于第一预设阈值；和/或，所述第二电池模组的供电通路的功率大于第二预设阈值，则获取所述第二电池模组。
在一些实施例中，所述处理模块802用于：
向整车控制单元发送所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差，以使所述整车控制单元基于所述压差返回所述第二电池模组的信息，若所述压差小于或等于第一预设阈值，所述整车控制单元返回所述第二电池模组的信息；获取所述第二电池模组的信息。
在一些实施例中，所述电池参数包括：所述电池模组的实时电压；所述处理模块802用于：若所述第一电池模组的实时电压与基准电压差值大于或等于第三预设阈值；和/或，所述电池模组的实时电压变化速率大于或等于第四预设阈值；和/或，所述电池模组的实时电压采样异常，则确定所述第一电池模组出现热失控。
需要说明的是，由于所述热失控处理装置与上述实施例中的热失控处理方法基于相同的发明构思，因此，上述方法实施例中的相应内容同样适用于装置实施例，此处不再详述。
因此，当动力电池包内有电池模组发生热失控时，该热失控处理装置可以利用未发生热失控的第二电池模组为冷却系统供电，使得冷却系统正常工作，带走动力电池包内因热失控而产生的热量，对动力电池包进行降温和散热，达到很好的散热效果，进而提升动力电池包的安全性。
本申请实施例还提供了一种非暂态计算机可读存储介质，所述非暂态计算机可读存储介质存储有计算机可执行指令，该计算机可执行指令被一个或多个处理器执行，例如图2中的一个处理器101，可使得上述一个或多个处理器可执行上述任意方法实施例中的热失控处理方法。
本申请实施例还提供了一种计算机程序产品，所述计算机程序产品包括存储在非暂态计算机可读存储介质上的计算机程序，所述计算机程序包括程序指令，当所述程序指令被控制单元执行时，使所述控制单元执行任一项所述的热失控处理方法。
通过以上的实施方式的描述，本领域普通技术人员可以清楚地了解到各实施方 式可借助软件加通用硬件平台的方式来实现，当然也可以通过硬件。本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程是可以通过计算机程序产品中的计算机程序来指令相关的硬件来完成，所述的计算机程序可存储于非暂态计算机可读取存储介质中，该计算机程序包括程序指令，当所述程序指令被无人机执行时，可使所述无人机执行上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory,ROM)或随机存储记忆体(Random Access Memory,RAM)等。
上述产品可执行本申请实施例所提供的热失控处理方法，具备执行热失控处理方法相应的功能模块和有益效果。未在本实施例中详尽描述的技术细节，可参见本申请实施例所提供的热失控处理方法。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；在本申请的思路下，以上实施例或者不同实施例中的技术特征之间也可以进行组合，步骤可以以任意顺序实现，并存在如上所述的本申请的不同方面的许多其它变化，为了简明，它们没有在细节中提供；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (17)

  1. 一种热失控处理方法，包括：
    获取多个电池模组的每一个电池模组的电池参数，所述多个电池模组组成动力电池包；
    根据所述多个电池模组的每一个电池模组的电池参数确定第一电池模组出现热失控；
    基于所述第一电池模组，获取第二电池模组，所述第二电池模组为所述动力电池包中除开所述第一电池模组的至少一个电池模组；
    利用所述第二电池模组为冷却系统供电，所述冷却系统用于为所述动力电池包降温。
  2. 根据权利要求1所述的方法，其中，所述基于所述第一电池模组，获取第二电池模组，包括：
    基于所述第一电池模组和所述冷却系统的额定电压，获取所述第二电池模组，所述第二电池模组的输出电压大于或等于所述冷却系统的额定电压。
  3. 根据权利要求1所述的方法，其中，所述基于所述第一电池模组，获取第二电池模组，包括：
    向整车控制单元(VCU)发送第一信息，所述第一信息包括所述第一电池模组的信息，以使所述VCU基于所述冷却系统的额定电压以及所述第一电池模组的信息，生成第二信息；
    获取所述VCU发送的所述第二信息，所述第二信息包括所述第二电池模组的信息。
  4. 根据权利要求2所述的方法，其中，所述基于所述第一电池模组，获取第二电池模组，包括：
    获取整车控制单元(VCU)发送的所述冷却系统的额定电压；
    基于所述冷却系统的额定电压以及所述第一电池模组，获取所述第二电池模组。
  5. 根据权利要求1-4任意一项所述的方法，其中，所述基于所述第一电池模组，获取第二电池模组，包括：
    若所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差小于或等 于第一预设阈值；和/或，
    所述第二电池模组的供电通路的功率大于第二预设阈值，则获取所述第二电池模组。
  6. 根据权利要求1-5任意一项所述的方法，其中，所述基于所述第一电池模组，获取第二电池模组，包括：
    向整车控制单元(VCU)发送所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差，以使所述VCU基于所述压差返回所述第二电池模组的信息，若所述压差小于或等于第一预设阈值，所述VCU返回所述第二电池模组的信息；
    获取所述第二电池模组的信息。
  7. 根据权利要求1-6任意一项所述的方法，其中，所述电池参数包括：所述电池模组的实时电压；
    所述根据所述多个电池模组的每一个电池模组的电池参数确定第一电池模组出现热失控，包括：
    若所述第一电池模组的实时电压与基准电压差值大于或等于第三预设阈值；和/或，
    所述电池模组的实时电压变化速率大于或等于第四预设阈值；和/或，
    所述电池模组的实时电压采样异常，则确定所述第一电池模组出现热失控。
  8. 一种热失控处理装置，所述装置包括：
    获取模块，用于获取多个电池模组的每一个电池模组的电池参数，所述多个电池模组组成动力电池包；
    处理模块，用于根据所述多个电池模组的每一个电池模组的电池参数确定第一电池模组出现热失控；
    所述处理模块，还用于基于所述第一电池模组，获取第二电池模组，所述第二电池模组为所述动力电池包中除开所述第一电池模组的至少一个电池模组；
    所述处理模块，还用于利用所述第二电池模组为冷却系统供电，所述冷却系统用于为所述动力电池包降温。
  9. 根据权利要求8所述的装置，其中，所述处理模块用于：
    基于所述第一电池模组和所述冷却系统的额定电压，获取所述第二电池模组，所述第二电池模组的输出电压大于或等于所述冷却系统的额定电压。
  10. 根据权利要求9所述的装置，其中，所述处理模块用于：
    向整车控制单元(VCU)发送第一信息，所述第一信息包括所述第一电池模组的信息，以使所述VCU基于所述冷却系统的额定电压以及所述第一电池模组的信息，生成第二信息；
    获取所述VCU发送的所述第二信息，所述第二信息包括所述第二电池模组的信息。
  11. 根据权利要求9所述的装置，其中，所述处理模块用于：
    获取整车控制单元(VCU)发送的所述冷却系统的额定电压；
    基于所述冷却系统的额定电压以及所述第一电池模组，获取所述第二电池模组。
  12. 根据权利要求8-11任意一项所述的装置，其中，所述处理模块用于：
    若所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差小于或等于第一预设阈值；和/或，
    所述第二电池模组的供电通路的功率大于第二预设阈值，则获取所述第二电池模组。
  13. 根据权利要求8-11任意一项所述的装置，其中，所述处理模块用于：
    向整车控制单元(VCU)发送所述第二电池模组的供电通路的最高电压端与最低电压端之间的压差，以使所述VCU基于所述压差返回所述第二电池模组的信息，若所述压差小于或等于第一预设阈值，所述VCU返回所述第二电池模组的信息；
    获取所述第二电池模组的信息。
  14. 根据权利要求8-13任意一项所述的热失控处理装置，其中，所述电池参数包括：所述电池模组的实时电压；所述处理模块用于：
    若所述第一电池模组的实时电压与基准电压差值大于或等于第三预设阈值；和/或，
    所述电池模组的实时电压变化速率大于或等于第四预设阈值；和/或，
    所述电池模组的实时电压采样异常，则确定所述第一电池模组出现热失控。
  15. 一种电池管理系统，其中，所述电池管理系统包括:
    至少一个处理器；以及，
    与所述至少一个处理器通信连接的存储器；
    所述存储器存储有可被所述至少一个处理器执行的指令，所述指令被所述至少一 个处理器执行，以使所述至少一个处理器能够执行如权利要求1-7任一项所述的热失控处理方法。
  16. 一种非暂态计算机可读存储介质，其中，所述非暂态计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于执行如权利要求1-7任一项所述的热失控处理方法。
  17. 一种热失控处理系统，其中，所述热失控处理系统包括如权利要求15所述的电池管理系统。
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