CN110398699A - Power battery thermal runaway method for early warning combined of multi-sensor information - Google Patents
Power battery thermal runaway method for early warning combined of multi-sensor information Download PDFInfo
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- CN110398699A CN110398699A CN201910559059.7A CN201910559059A CN110398699A CN 110398699 A CN110398699 A CN 110398699A CN 201910559059 A CN201910559059 A CN 201910559059A CN 110398699 A CN110398699 A CN 110398699A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- 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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- 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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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Abstract
The application provides a kind of power battery thermal runaway method for early warning combined of multi-sensor information, pass through the Real-time Monitoring Data of battery cell voltage and battery cell temperature, it calculates minimum battery cell voltage to deviate the exception of average voltage, calculates highest monomer temperature and the exception of mean temperature is deviated.Real-time monitoring combustable gas concentration and gas pressure simultaneously, judge whether combustable gas concentration reaches threshold value, whether gas pressure reaches threshold value.Comprehensively consider above each parameter, carries out thermal runaway early warning.Thermal runaway early warning can be come out before thermal runaway occurs by this method, to largely reduce harm caused by thermal runaway.The application will be helpful to improve the reliability of power battery safety management, reduce the generation of security of lithium-ion-power cell accident.
Description
Technical field
This application involves battery technology fields, more particularly to a kind of power battery thermal runaway combined of multi-sensor information
Method for early warning.
Background technique
To alleviate energy shortage and problem of environmental pollution, new-energy automobile is included in emerging strategic technology and produced by China
Industry.Automobile dynamic system motorized has been increasingly becoming one of the main trend of future automobile technology development.Automobile dynamic system electricity
Even if one of main feature of dynamicization uses electric energy to substitute chemical energy as the main driving energy source of vehicle.Lithium ion power electricity
Chi Yinqi has the characteristics that specific energy is high, self-discharge rate is low and has extended cycle life, and is the pure electric vehicle of current most practical value
Automobile energy source.
However, the large-scale application with lithium ion battery on electric car, dynamic by the lithium ion of representative of thermal runaway
Power battery security accident happens occasionally.Lithium-ion-power cell accident is usually expressed as rapid using thermal runaway as the temperature of core
Rise, smolder, it is on fire in addition explosion phenomena such as.Thermal runaway accident usually releases big energy in a short time, easily causes people
Member's injures and deaths and property loss.Therefore thermal runaway accident can hit the common people and receive the confidence of electric car, and hinder electric car
It is universal.
Lithium-ion-power cell thermal runaway accident (may be overcharged by machinery abuse (extruding, needle thorn, collision etc.), electricity abuse
Electricity, overdischarge, internal short-circuit etc.) and heat abuse initiation.There are certain inner link between these three abuses, machinery abuse causes
The deformation of battery, and the deformation of battery is likely to result in internal short-circuit, that is, leads to electric abuse, and electricity abuse is usually associated with Joule heat
That is chemical reaction heat, the accumulation of heat lead to hot abuse, and final heat abuse causes battery temperature to increase, and cause thermal runaway chain type anti-
It answers.
Correlative study shows the anti-life and thermal runaway that there is no cocksure method to avoid thermal runaway at present in battery system
Sprawling in system, therefore, in order to reduce the harm of thermal runaway, to make thermal runaway early warning extremely necessary before thermal runaway generation.
Traditional thermal runaway method for early warning detection accuracy is low.
Summary of the invention
Based on this, it is necessary to for the low problem of traditional thermal runaway method for early warning detection accuracy, provide one kind and sense more
The power battery thermal runaway method for early warning of device information fusion.
A kind of power battery thermal runaway method for early warning combined of multi-sensor information, comprising:
S10 obtains the thermal runaway parameter of power battery in real time, and the thermal runaway parameter includes every in power battery module
The voltage value and temperature value of one battery cell, the thermal runaway parameter further include the fuel gas of the power battery module
The pressure of concentration and gas；
S20, according to voltage value described in each, each described temperature value, the concentration of the fuel gas and described
The pressure of gas obtains Fisrt fault position, the second fault bit, third fault bit and the 4th fault bit respectively；
S30, according to the Fisrt fault position, second fault bit, the third fault bit and the 4th failure
Position obtains total failare position；
S40, judges whether the total failare position is greater than or equal to preset failure position threshold value, be greater than when the total failare position or
When equal to the preset failure position threshold value, thermal runaway alarm is carried out.
The specific steps for obtaining the Fisrt fault position in one of the embodiments, include:
According to the voltage value of battery cell described in each, monomer voltage average value and monomer voltage minimum value are obtained；
According to the monomer voltage average value and the monomer voltage minimum value, actual battery monomer voltage difference is obtained
Value；
According to the actual battery monomer voltage difference value, the Fisrt fault position is obtained.
It is described according to the actual battery monomer voltage difference value in one of the embodiments, obtain first event
Barrier position specific steps include:
The range of default battery cell voltage difference value is divided into multiple Voltage Reference sections；
Judge Voltage Reference section belonging to the actual battery monomer voltage difference value, and then determines the Fisrt fault
Position.
The specific steps for obtaining second fault bit in one of the embodiments, include:
The S30 obtains monomer temperature average value and monomer temperature most according to the temperature value of battery cell described in each
Big value；
According to the monomer temperature average value and the monomer temperature maximum value, actual battery monomer temperature difference is obtained
Value；
According to the actual battery monomer temperature difference value, second fault bit is obtained.
It is described according to the actual battery monomer temperature difference value in one of the embodiments, obtain second event
Barrier position specific steps include:
The range of default battery cell temperature difference value is divided into multiple temperature reference sections；
Judge temperature reference section belonging to the actual battery monomer temperature difference value, and then determines second failure
Position.
The specific steps for obtaining the third fault bit in one of the embodiments, include:
According to the concentration value of the concentration value of current time fuel gas and initial time fuel gas, the battery mould is obtained
The actual concentrations difference value of group；
According to the actual concentrations difference value, the third fault bit is obtained.
It is described according to the actual concentrations difference value in one of the embodiments, obtain the tool of the third fault bit
Body step includes:
The range of default battery modules concentration difference value is divided into multiple concentration reference intervals；
Judge concentration reference interval belonging to the actual concentrations difference value, and then determines the third fault bit.
The specific steps for obtaining the 4th fault bit in one of the embodiments, include:
According to the pressure value of the pressure value of current time gas and initial time gas, the reality of the battery modules is obtained
Pressure gap value；
According to the actual pressure difference value, the 4th fault bit is obtained.
It is described according to the actual pressure difference value in one of the embodiments, obtain the tool of the 4th fault bit
Body step includes:
The range of default battery modules pressure gap value is divided into multiple pressure reference sections；
Judge pressure reference section belonging to the actual pressure difference value, and then determines the 4th fault bit.
A kind of computer equipment, the meter run on a memory and on a processor including memory, processor and storage
Calculation machine program, the processor realize the heat of power battery described in any one of above-described embodiment when executing the computer program
The step of method for early warning out of control.
Above-mentioned power battery thermal runaway method for early warning combined of multi-sensor information, passes through battery cell voltage and battery list
The Real-time Monitoring Data of temperature calculates minimum battery cell voltage and deviates to the exception of average voltage, calculates highest monomer temperature
It spends and the exception of mean temperature is deviated.Real-time monitoring combustable gas concentration and gas pressure simultaneously, judge that combustable gas concentration is
No to reach threshold value, whether gas pressure reaches threshold value.Comprehensively consider above each parameter, carries out thermal runaway early warning.Pass through this method
Thermal runaway early warning can be come out before thermal runaway occurs, to largely reduce harm caused by thermal runaway.The application
The reliability that will be helpful to improve power battery safety management, reduces the generation of security of lithium-ion-power cell accident.
Detailed description of the invention
Fig. 1 is the power battery thermal runaway method for early warning flow chart that the application one embodiment provides；
Fig. 2 is the calculating for the total failare position that the application one embodiment provides and the decision condition signal of thermal runaway early warning
Figure；
Fig. 3 is the fault bit for each parameter that the application one embodiment provides and the curve graph of total failare position.
Specific embodiment
In order to make the above objects, features, and advantages of the present application more apparent, with reference to the accompanying drawing to the application
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this Shen
Please.But the application can be implemented with being much different from other way described herein, those skilled in the art can be not
Similar improvement is done in the case where violating the application intension, therefore the application is not limited by following public specific implementation.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Referring to Figure 1, it is pre- to provide a kind of power battery thermal runaway combined of multi-sensor information for the application one embodiment
Alarm method.The power battery thermal runaway method for early warning combined of multi-sensor information includes:
S10 obtains the thermal runaway parameter of power battery in real time, and the thermal runaway parameter includes every in power battery module
The voltage value and temperature value of one battery cell, the thermal runaway parameter further include the fuel gas of the power battery module
The pressure of concentration and gas.In step S10, the power battery can be lithium-ion-power cell.The lithium ion power electricity
The rated capacity in pond can be 25Ah.Above-mentioned detection parameters can be obtained in real time by multiple sensors.
S20, according to voltage value described in each, each described temperature value, the concentration of the fuel gas and described
The pressure of gas obtains Fisrt fault position, the second fault bit, third fault bit and the 4th fault bit respectively.Specifically, can be with
According to the voltage value of battery cell described in each, monomer voltage average value and monomer voltage minimum value are obtained, according to the list
Bulk voltage average value and the monomer voltage minimum value obtain Fisrt fault position.Processor electricity described in synchronization can be passed through
The cell voltage value of all battery cells is ranked up in Chi Mo group, and calculates the average voltage at current time.Described first
Fault bit can take 0,1 or 2.The value of the fault bit is bigger, and thermal runaway more possibly occurs.
Specifically, obtaining monomer temperature average value and monomer temperature most according to the temperature value of battery cell described in each
Big value obtains the second fault bit according to the monomer temperature average value and the monomer temperature maximum value.It, can be in step S30
By processor in the battery modules described in synchronization the monomer temperature value of all battery cells be ranked up, and calculate current
The temperature averages at moment.Second fault bit can take 0,1 or 2.The value of the fault bit is bigger, more possibly occurs
Thermal runaway.
Specifically, obtaining third fault bit according to the real-time concentration value of the fuel gas of the power battery module.Step
In S40, before thermal runaway occurs, the concentration value of the fuel gas can be sharply increased, therefore institute can be judged by processor
The size of the difference value of combustable gas concentration is stated, and then determines the value of the third fault bit.The third fault bit can take 0
Or 1.
Specifically, obtaining the 4th fault bit according to the real-time pressure value of the gas of the power battery module.Step S50
In, before thermal runaway occurs, the pressure value of the gas can be sharply increased, therefore the gas pressure can be judged by processor
The size of the difference value of power, and then determine the value of the 4th fault bit.4th fault bit can take 0 or 1.
S30, according to the Fisrt fault position, the second fault bit, third fault bit, the 4th fault bit and the 5th fault bit
Obtain total failare position.In step S30, after the value of each fault bit has been determined respectively by the processor, it can pass through
Adder calculates the value of total failare position, as shown in Figure 2.
S40, judges whether the total failare position is greater than or equal to preset failure position threshold value, be greater than when the total failare position or
When equal to the preset failure position threshold value, thermal runaway alarm is carried out.In step S40, preset failure position threshold value can pass through
Test of many times is set.In one alternate embodiment, preset failure position threshold value can be 5, as shown in Figure 3.
In the present embodiment, by the Real-time Monitoring Data of battery cell voltage and battery cell temperature, minimum battery is calculated
Monomer voltage deviates the exception of average voltage, calculates highest monomer temperature and deviates to the exception of mean temperature.It supervises in real time simultaneously
Combustable gas concentration and gas pressure are surveyed, judges whether combustable gas concentration reaches threshold value, whether gas pressure reaches threshold value.It is comprehensive
It closes and considers above each parameter, carry out thermal runaway early warning.Thermal runaway early warning can be come out before thermal runaway occurs by this method,
To largely reduce harm caused by thermal runaway.The application will be helpful to improve the reliable of power battery safety management
Property, reduce the generation of security of lithium-ion-power cell accident.
In one embodiment, according to the voltage value of battery cell described in each, monomer voltage average value and list are obtained
Bulk voltage minimum value obtains the specific step of Fisrt fault position according to the monomer voltage average value and the monomer voltage minimum value
Suddenly include:
According to the monomer voltage average value and the monomer voltage minimum value, actual battery monomer voltage difference is obtained
Value.The range of default battery cell voltage difference value is divided into multiple Voltage Reference sections, each Voltage Reference section pair
The value of one Fisrt fault position should be set.Judge Voltage Reference section belonging to the actual battery monomer voltage difference value, into
And determine the Fisrt fault position.
The quantity in the Voltage Reference section can be three.First event that first voltage reference interval is correspondingly arranged
The value for hindering position is 0, and the value for the Fisrt fault position that second voltage reference interval is correspondingly arranged is 1, tertiary voltage reference interval
The value for the Fisrt fault position being correspondingly arranged is 2.In one alternate embodiment, the first voltage reference interval be [0V,
0.1V).The second voltage reference interval be [0.1V, 5V).The tertiary voltage reference interval be [5V ,+∞).When the reality
When border battery cell voltage difference value is greater than 0.1V, the Fisrt fault position jumps to 1 from 0.When the actual battery monomer electricity
When difference value being pressed to be greater than 5V, the Fisrt fault position jumps to 2 from 1.
In one embodiment, the temperature value according to battery cell described in each obtains monomer temperature average value
With monomer temperature maximum value, the tool of the second fault bit is obtained according to the monomer temperature average value and the monomer temperature maximum value
Body step includes:
According to the monomer temperature average value and the monomer temperature maximum value, actual battery monomer temperature difference is obtained
Value.The range of default battery cell temperature difference value is divided into multiple temperature reference sections, each temperature reference section pair
The value of one the second fault bit should be set.Judge temperature reference section belonging to the actual battery monomer temperature difference value, into
And determine second fault bit.
The quantity in the temperature reference section can be three, second event that the first temperature reference section is correspondingly arranged
The value for hindering position is 0, and the value for second fault bit that second temperature reference interval is correspondingly arranged is 1, third temperature reference section
The value for second fault bit being correspondingly arranged is 2.In an alternative embodiment, first temperature reference section is [0
DEG C, 5 DEG C).The second temperature reference interval be [5 DEG C, 10 DEG C).Third temperature reference section be [10 DEG C ,+∞).When
When the actual battery monomer temperature difference value is greater than 5 DEG C, second fault bit jumps to 1 from 0.When the actual battery list
When temperature difference value is greater than 10 DEG C, second fault bit jumps to 2 from 1.
In one embodiment, the real-time concentration value of the fuel gas according to the power battery module obtains the
The specific steps of three fault bits include:
According to the concentration value of the concentration value of current time fuel gas and initial time fuel gas, the battery mould is obtained
The actual concentrations difference value of group.The range of default battery modules concentration difference value is divided into multiple concentration reference intervals, it is each
A concentration reference interval is correspondingly arranged the value of a third fault bit.Judge that concentration belonging to the actual concentrations difference value refers to
Section, and then determine the third fault bit.The concentration value of the fuel gas of the initial time can be detection start time
Fuel gas concentration value.The concentration value of the fuel gas of the initial time can also be what the processor was arbitrarily set
The concentration value of a certain fuel gas at the preceding moment.
The quantity of the concentration reference interval can be two, the third event that the first concentration reference interval is correspondingly arranged
The value for hindering position is 0, and the value for the third fault bit that the second concentration reference interval is correspondingly arranged is 1.It is to be herein pointed out
The sensor of detection combustable gas concentration can be gas sensor.The gas sensor can be Semiconductor gas sensors sensing
Device.The working principle of the gas sensor is mainly, and with the increase of gas concentration to be detected, the resistance of semiconductor can change
Become, by this semiconductor and a fixed value resistance series connection, by the voltage for measuring semiconductor both ends, so that it may detect under test gas
Concentration.Therefore the concentration value of the fuel gas can be reacted by the voltage value that the gas sensor detects.One
In a optional embodiment, the first concentration reference interval be [0V, 1V).The second concentration reference interval be [1V ,+
∞).When the actual concentrations difference value is greater than 1V, the third fault bit jumps to 1 from 0.
In one embodiment, the real-time pressure value of the gas according to the power battery module obtains the 4th event
Barrier position specific steps include:
According to the pressure value of the pressure value of current time gas and initial time gas, the reality of the battery modules is obtained
Pressure gap value.The range of default battery modules pressure gap value is divided into multiple pressure reference sections, each pressure ginseng
The value of the 4th fault bit is correspondingly arranged between examination district.Judge pressure reference section belonging to the actual pressure difference value, into
And determine the 4th fault bit.The pressure value of the initial time gas can be the pressure of the gas of detection start time
Value.The pressure value of the gas of the initial time can also be a certain gas at the preceding moment that the processor is arbitrarily set
Pressure value.
The quantity in the pressure reference section is two, the 4th fault bit that first pressure reference interval is correspondingly arranged
Value be 0, the value of the 4th fault bit that second pressure reference interval is correspondingly arranged is 1.In an alternative embodiment,
The first pressure reference interval be [0KPa, 10KPa).The second pressure reference interval be [10KPa ,+∞).When the reality
When border pressure gap value is greater than 10KPa, the 4th fault bit jumps to 1 from 0.Each parameter that the application one embodiment provides
Threshold value and each parametic fault position really fixed condition as shown in following table one.
Table one, each parameter threshold and each parametic fault position fixed condition really
A kind of computer equipment, the meter run on a memory and on a processor including memory, processor and storage
Calculation machine program, the processor realize the heat of power battery described in any one of above-described embodiment when executing the computer program
The step of method for early warning out of control.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to claim therefore cannot be interpreted as.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of power battery thermal runaway method for early warning combined of multi-sensor information characterized by comprising
S10 obtains the thermal runaway parameter of power battery in real time, and the thermal runaway parameter includes each of power battery module
The voltage value and temperature value of battery cell, the thermal runaway parameter further include the concentration of the fuel gas of the power battery module
And the pressure of gas；
S20, according to voltage value described in each, each described temperature value, the concentration of the fuel gas and the gas
Pressure, obtain Fisrt fault position, the second fault bit, third fault bit and the 4th fault bit respectively；
S30 is obtained according to the Fisrt fault position, second fault bit, the third fault bit and the 4th fault bit
Obtain total failare position；
S40, judges whether the total failare position is greater than or equal to preset failure position threshold value, when the total failare position is greater than or equal to
When the preset failure position threshold value, thermal runaway alarm is carried out.
2. power battery thermal runaway method for early warning combined of multi-sensor information according to claim 1, which is characterized in that
The specific steps for obtaining the Fisrt fault position include:
According to the voltage value of battery cell described in each, monomer voltage average value and monomer voltage minimum value are obtained；
According to the monomer voltage average value and the monomer voltage minimum value, actual battery monomer voltage difference value is obtained；
According to the actual battery monomer voltage difference value, the Fisrt fault position is obtained.
3. power battery thermal runaway method for early warning combined of multi-sensor information according to claim 2, which is characterized in that
It is described according to the actual battery monomer voltage difference value, the specific steps for obtaining the Fisrt fault position include:
The range of default battery cell voltage difference value is divided into multiple Voltage Reference sections；
Judge Voltage Reference section belonging to the actual battery monomer voltage difference value, and then determines the Fisrt fault position.
4. power battery thermal runaway method for early warning combined of multi-sensor information according to claim 1, which is characterized in that
The specific steps for obtaining second fault bit include:
The S30 obtains monomer temperature average value and monomer temperature is maximum according to the temperature value of battery cell described in each
Value；
According to the monomer temperature average value and the monomer temperature maximum value, actual battery monomer temperature difference value is obtained；
According to the actual battery monomer temperature difference value, second fault bit is obtained.
5. power battery thermal runaway method for early warning combined of multi-sensor information according to claim 4, which is characterized in that
It is described according to the actual battery monomer temperature difference value, the specific steps for obtaining second fault bit include:
The range of default battery cell temperature difference value is divided into multiple temperature reference sections；
Judge temperature reference section belonging to the actual battery monomer temperature difference value, and then determines second fault bit.
6. power battery thermal runaway method for early warning combined of multi-sensor information according to claim 1, which is characterized in that
The specific steps for obtaining the third fault bit include:
According to the concentration value of the concentration value of current time fuel gas and initial time fuel gas, the battery modules are obtained
Actual concentrations difference value；
According to the actual concentrations difference value, the third fault bit is obtained.
7. power battery thermal runaway method for early warning combined of multi-sensor information according to claim 6, which is characterized in that
It is described according to the actual concentrations difference value, the specific steps for obtaining the third fault bit include:
The range of default battery modules concentration difference value is divided into multiple concentration reference intervals；
Judge concentration reference interval belonging to the actual concentrations difference value, and then determines the third fault bit.
8. power battery thermal runaway method for early warning combined of multi-sensor information according to claim 1, which is characterized in that
The specific steps for obtaining the 4th fault bit include:
According to the pressure value of the pressure value of current time gas and initial time gas, the actual pressure of the battery modules is obtained
Difference value；
According to the actual pressure difference value, the 4th fault bit is obtained.
9. power battery thermal runaway method for early warning combined of multi-sensor information according to claim 8, which is characterized in that
It is described according to the actual pressure difference value, the specific steps for obtaining the 4th fault bit include:
The range of default battery modules pressure gap value is divided into multiple pressure reference sections；
Judge pressure reference section belonging to the actual pressure difference value, and then determines the 4th fault bit.
10. a kind of computer equipment, the calculating run on a memory and on a processor including memory, processor and storage
Machine program, which is characterized in that the processor is realized described in any one of claims 1 to 9 when executing the computer program
Power battery thermal runaway method for early warning combined of multi-sensor information the step of.
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| CN112731169A (en) * | 2020-12-22 | 2021-04-30 | 上汽大众汽车有限公司 | All-weather monitoring system and method for thermal runaway of power battery |
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| CN113711073A (en) * | 2020-03-17 | 2021-11-26 | 株式会社Lg新能源 | Apparatus and method for predicting abnormal condition of battery and battery management system providing the same |
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| CN115516324A (en) * | 2021-04-14 | 2022-12-23 | 日产自动车株式会社 | Thermal diffusion determination method and thermal diffusion detection system for battery pack |
| WO2023011066A1 (en) * | 2021-08-03 | 2023-02-09 | 长城汽车股份有限公司 | Performance test method for battery thermal management system, and related device |
| CN116520171A (en) * | 2023-06-29 | 2023-08-01 | 广汽埃安新能源汽车股份有限公司 | Method and device for determining early warning strategy of thermal runaway of battery |
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