CN113054271A - Method and device for detecting safety state of battery - Google Patents

Method and device for detecting safety state of battery Download PDF

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Publication number
CN113054271A
CN113054271A CN201911376998.4A CN201911376998A CN113054271A CN 113054271 A CN113054271 A CN 113054271A CN 201911376998 A CN201911376998 A CN 201911376998A CN 113054271 A CN113054271 A CN 113054271A
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change slope
battery module
pressure sensor
pressure change
pressure
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沈强
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Beijing CHJ Automobile Technology Co Ltd
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Beijing CHJ Automobile Technology Co Ltd
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Priority to CN201911376998.4A priority Critical patent/CN113054271A/en
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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
    • H01M10/42—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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • 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]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • 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

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

The embodiment of the disclosure discloses a method and a device for detecting the safety state of a battery, relates to the technical field of automobiles, and can solve the problem of low accuracy rate of detecting the safety state of the battery in a battery module in the prior art. The method of the embodiment of the present disclosure includes: acquiring a first pressure change slope of a first pressure sensor and a second pressure change slope of a second pressure sensor in a battery module to be tested; the mounting positions of the first pressure sensor and the second pressure sensor in the battery module to be tested are different; and respectively judging whether the first pressure change slope and the second pressure change slope meet the respective corresponding state ranges, determining the safety state of the battery module to be tested according to the judgment result, and outputting the reminding information corresponding to the safety state. The embodiment of the disclosure is mainly applicable to a scene of thermal runaway detection of an automobile battery.

Description

Method and device for detecting safety state of battery
Technical Field
The embodiment of the disclosure relates to the technical field of automobiles, in particular to a method and a device for detecting the safety state of a battery.
Background
With the rapid development of the new energy automobile industry, the new energy automobile has higher and higher reserve, the reserve of fuel oil automobiles is reduced, and the living environment of people is improved. However, the new energy automobile is not an all-good automobile, and has certain safety problems, especially the battery is easy to generate thermal runaway, so that the automobile is damaged, and even people are injured and killed.
At present, the method for detecting the safety state of the battery mainly comprises the following steps: the pressure sensor is used for detecting the pressure in the battery module, whether the pressure value is larger than a preset pressure threshold value or not is judged in real time, and if the pressure value is larger than the preset pressure threshold value, it is determined that the battery in the battery module has thermal runaway. However, the initial pressure values of the battery modules produced by different merchants or the battery modules produced by the same merchant and having the same architecture are different, so that the pressure values in the same state are also different, and if only the same threshold is used for determining the safety state of the current battery module, a large error exists.
Disclosure of Invention
In view of this, embodiments of the present disclosure provide a method and an apparatus for detecting a battery safety state, which aim to improve an accuracy of detecting the battery safety state in a battery module.
The embodiment of the disclosure mainly provides the following technical scheme:
in a first aspect, an embodiment of the present disclosure provides a method for detecting a security state, where the method includes:
acquiring a first pressure change slope of a first pressure sensor and a second pressure change slope of a second pressure sensor in a battery module to be tested, wherein the first pressure sensor and the second pressure sensor are arranged at different positions in the battery module to be tested;
and respectively judging whether the first pressure change slope and the second pressure change slope meet the respective corresponding state ranges, determining the safety state of the battery module to be tested according to the judgment result, and outputting the reminding information corresponding to the safety state.
In some embodiments, respectively determining whether the first pressure change slope and the second pressure change slope satisfy respective corresponding state ranges, and determining the safety state of the battery module to be tested according to the determination result includes:
respectively judging whether the first pressure change slope and the second pressure change slope meet the corresponding first state ranges; the first state range is determined based on a pressure change slope obtained by a thermal runaway test of the test battery module;
and if the first pressure change slope or the second pressure change slope meets the corresponding first state range, determining that the battery module to be tested is in a state with a thermal runaway risk.
In some embodiments, the first state range for the first pressure sensor is (K)3，K1) (ii) a The first state range corresponding to the second pressure sensor is (K)4，K2)；
Wherein, K1The method comprises the following steps that in the process of carrying out a thermal runaway test on a test battery module, when the test battery module is subjected to thermal runaway, the pressure change slope of a first pressure sensor in the test battery module is obtained;
K2when the test battery module is subjected to thermal runaway test, the pressure change slope of a second pressure sensor in the test battery module is obtained;
K3the maximum pressure change slope of the first pressure sensor is obtained in the normal working process of the test battery module;
K4and the maximum pressure change slope of the second pressure sensor is obtained in the normal working process of the test battery module.
In some embodiments, K3The maximum value of the maximum pressure change slope of the first pressure sensor when the life cycle test is carried out on the test battery module and the maximum pressure change slope of the first pressure sensor when the limit working condition test is carried out on the test battery module;
K4the maximum pressure change slope of the second pressure sensor when the service life cycle test is carried out on the test battery module and the maximum pressure change slope of the second pressure sensor when the limit working condition test is carried out on the test battery moduleThe maximum value among them.
In some embodiments, respectively determining whether the first pressure change slope and the second pressure change slope satisfy respective corresponding state ranges, and determining the safety state of the battery module to be tested according to the determination result includes:
respectively judging whether the first pressure change slope and the second pressure change slope meet respective corresponding second state ranges; the second state range is determined based on a pressure change slope obtained by a thermal runaway test of the test battery module;
and if the first pressure change slope or the second pressure change slope meets a corresponding second state range, determining that the battery module to be tested is in a thermal runaway state.
In some embodiments, the second state range corresponding to the first pressure sensor is [ K ]1, + ∞); the second state range corresponding to the second pressure sensor is [ K ]2，+∞)。
In some embodiments, respectively determining whether the first pressure change slope and the second pressure change slope satisfy respective corresponding state ranges, and determining the safety state of the battery module to be tested according to the determination result includes:
respectively judging whether the first pressure change slope and the second pressure change slope meet respective corresponding third state ranges; the third state range is determined based on a pressure change slope obtained by a normal use test of the test battery module;
and if the first pressure change slope and the second pressure change slope meet a corresponding third state range, determining that the battery module to be tested is in a normal state.
In some embodiments, the third state range corresponding to the first pressure sensor is [0, K ]3](ii) a The third state range corresponding to the second pressure sensor is [0, K ]4]。
In some embodiments, acquiring a first pressure change slope of a first pressure sensor and a second pressure change slope of a second pressure sensor in the battery module under test comprises:
acquiring an initial pressure value of the first pressure sensor and an initial pressure value of the second pressure sensor before the battery module to be tested is used, and acquiring a current pressure value of the first pressure sensor and a current pressure value of the second pressure sensor in the using process of the battery module to be tested;
calculating a first pressure change slope of the first pressure sensor according to the current pressure value of the first pressure sensor and the initial pressure value of the first pressure sensor;
and calculating a second pressure change slope of the second pressure sensor according to the current pressure value of the second pressure sensor and the initial pressure value of the second pressure sensor.
In some embodiments, the first pressure sensor is located between an end plate of the battery module and the battery;
the second pressure sensor is positioned between the batteries of the battery module.
In a second aspect, an embodiment of the present disclosure provides an apparatus for detecting a safe state of a battery, the apparatus including:
the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring a first pressure change slope of a first pressure sensor and a second pressure change slope of a second pressure sensor in a battery module to be tested, and the first pressure sensor and the second pressure sensor are arranged at different installation positions in the battery module to be tested;
the determining unit is used for respectively judging whether the first pressure change slope and the second pressure change slope meet the respective corresponding state ranges, and determining the safety state of the battery module to be tested according to the judgment result;
and the output unit is used for outputting the reminding information corresponding to the safety state.
In some embodiments, the determining unit comprises:
the first judgment module is used for respectively judging whether the first pressure change slope and the second pressure change slope meet the corresponding first state ranges; the first state range is determined based on a pressure change slope obtained by a thermal runaway test of the test battery module;
and the first determining module is used for determining that the battery module to be tested is in a state with a thermal runaway risk when the first pressure change slope or the second pressure change slope meets the corresponding first state range.
In some embodiments, the first state range for the first pressure sensor is (K)3，K1) (ii) a The first state range corresponding to the second pressure sensor is (K)4，K2)；
Wherein, K1The method comprises the following steps that in the process of carrying out a thermal runaway test on a test battery module, when the test battery module is subjected to thermal runaway, the pressure change slope of a first pressure sensor in the test battery module is obtained;
K2when the test battery module is subjected to thermal runaway test, the pressure change slope of a second pressure sensor in the test battery module is obtained;
K3the maximum pressure change slope of the first pressure sensor is obtained in the normal working process of the test battery module;
K4and the maximum pressure change slope of the second pressure sensor is obtained in the normal working process of the test battery module.
In some embodiments, K3The maximum value of the maximum pressure change slope of the first pressure sensor when the life cycle test is carried out on the test battery module and the maximum pressure change slope of the first pressure sensor when the limit working condition test is carried out on the test battery module;
K4the maximum pressure change slope of the second pressure sensor when the test battery module is subjected to a life cycle test and the maximum pressure change slope of the second pressure sensor when the test battery module is subjected to a limit condition test are the maximum values.
In some embodiments, the determining unit comprises:
the second judgment module is used for respectively judging whether the first pressure change slope and the second pressure change slope meet the corresponding second state ranges; the second state range is determined based on a pressure change slope obtained by a thermal runaway test of the test battery module;
and the second determining module is used for determining that the battery module to be tested is in a thermal runaway state when the first pressure change slope or the second pressure change slope meets a corresponding second state range.
In some embodiments, the second state range corresponding to the first pressure sensor is [ K ]1, + ∞); the second state range corresponding to the second pressure sensor is [ K ]2，+∞)。
In some embodiments, the determining unit comprises:
the third judging module is used for respectively judging whether the first pressure change slope and the second pressure change slope meet the respective corresponding third state ranges; the third state range is determined based on a pressure change slope obtained by a normal use test of the test battery module;
and the third determining module is used for determining that the battery module to be tested is in a normal state when the first pressure change slope and the second pressure change slope meet a corresponding third state range.
In some embodiments, the third state range corresponding to the first pressure sensor is [0, K ]3](ii) a The third state range corresponding to the second pressure sensor is [0, K ]4]。
In some embodiments, the obtaining unit comprises:
the acquisition module is used for acquiring an initial pressure value of the first pressure sensor and an initial pressure value of the second pressure sensor before the battery module to be tested is used, and a current pressure value of the first pressure sensor and a current pressure value of the second pressure sensor in the using process of the battery module to be tested;
the calculation module is used for calculating a first pressure change slope of the first pressure sensor according to the current pressure value of the first pressure sensor and the initial pressure value of the first pressure sensor; and calculating a second pressure change slope of the second pressure sensor according to the current pressure value of the second pressure sensor and the initial pressure value of the second pressure sensor.
In some embodiments, the first pressure sensor is located between an end plate of the battery module and the battery;
the second pressure sensor is positioned between the batteries of the battery module.
In a third aspect, an embodiment of the present disclosure provides a storage medium, where the storage medium includes a stored program, and when the program runs, a device in which the storage medium is located is controlled to execute the method for detecting the battery safety state according to the first aspect.
In a fourth aspect, embodiments of the present disclosure provide an apparatus for detecting a safe state of a battery, the apparatus including a storage medium; and one or more processors, the storage medium coupled with the processors, the processors configured to execute program instructions stored in the storage medium; the program instructions when executed perform the method for detecting the battery safety state of the first aspect.
In a fifth aspect, embodiments of the present disclosure provide a vehicle comprising the apparatus of the fourth aspect.
By means of the technical scheme, the method and the device for detecting the safety state of the battery, provided by the embodiment of the disclosure, judge the safety state of the battery module through using the pressure change slope, can eliminate the influence of different initial pressure values, can judge two different pressure values in the battery module through respectively installing the first pressure sensor and the second pressure sensor at different positions of the battery module to be detected, and accordingly realize the all-round detection of the battery module. And then improve the rate of accuracy of detecting the battery safe state in the battery module from two aspects of omnibearing detection and elimination of initial pressure value influence.
The foregoing description is only an overview of the embodiments of the present disclosure, and in order to make the technical means of the embodiments of the present disclosure more clearly understood, the embodiments of the present disclosure may be implemented in accordance with the content of the description, and in order to make the foregoing and other objects, features, and advantages of the embodiments of the present disclosure more clearly understood, the following detailed description of the embodiments of the present disclosure is given.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the embodiments of the present disclosure. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 illustrates a flowchart of a method for detecting a safe state of a battery according to an embodiment of the present disclosure;
fig. 2 illustrates an exemplary diagram of a pressure measurement structure of a battery module provided by an embodiment of the present disclosure;
fig. 3 is a diagram illustrating another example of a pressure measurement structure of a battery module according to an embodiment of the present disclosure;
FIG. 4 shows a flow chart of another method for detecting the safe state of a battery provided by the embodiments of the present disclosure;
fig. 5 is a block diagram illustrating components of an apparatus for detecting a safe state of a battery according to an embodiment of the present disclosure;
fig. 6 shows a block diagram of another apparatus for detecting a safe state of a battery according to an embodiment of the present disclosure.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
An embodiment of the present disclosure provides a method for detecting a safety state of a battery, as shown in fig. 1, the method including:
101. and acquiring a first pressure change slope of a first pressure sensor and a second pressure change slope of a second pressure sensor in the battery module to be tested.
The battery module comprises at least one battery monomer, and when the battery module provides a power source for the electric automobile, the battery module belongs to the power battery module. The first pressure sensor and the second pressure sensor are arranged at different positions in the battery module to be tested. The first pressure sensor can be located between the end plate and the battery on any side of the battery module, and the second pressure sensor can be located between the batteries of any two batteries of the battery module. For example, as shown in fig. 2, a first pressure sensor is located between the left end plate of the battery module and the battery, and the second pressure sensor may be located between the first battery and the second battery. As shown in fig. 3, the first pressure sensor is located between the right end plate of the battery module and the battery, and the second pressure sensor is located between the second battery and the third battery.
During the use of the battery module, the pressure at each position can be changed continuously, and the larger the pressure value is, the more easily thermal runaway is generated. However, the initial pressure values of the battery modules produced by different merchants or the battery modules produced by the same merchant and having the same architecture are different, so that the pressure values in the same state are different, and if only the same threshold is used for judging the safety state of the current battery module, a large error exists.
In order to reduce the error, the safety state of the battery module may be determined in a manner of a change slope of the current pressure value with respect to the initial pressure value. Wherein the safe state comprises a normal state, a state with thermal runaway risk (namely a thermal runaway state) and a thermal runaway state.
102. And respectively judging whether the first pressure change slope and the second pressure change slope meet the respective corresponding state ranges, determining the safety state of the battery module to be tested according to the judgment result, and outputting the reminding information corresponding to the safety state.
When the safety state is a state with a thermal runaway risk, outputting early warning information of the impending thermal runaway of the battery module to be tested; when the safety state is a thermal runaway state, outputting early warning information that the thermal runaway of the battery module to be tested is occurring; when the safety state is the normal state, the prompt message that the battery module to be tested is normal can be output.
The manner of sending out the warning information may be a voice with warning content, a voice without specific warning content, a warning light, or sending the warning information to a designated terminal (for example, a driver's mobile phone) in a short message form, and the like.
The method for detecting the safety state of the battery provided by the embodiment of the disclosure judges the safety state of the battery module through using the pressure change slope, can eliminate the influence of different initial pressure values, and can judge two different pressure values in the battery module through respectively installing the first pressure sensor and the second pressure sensor at different positions of the battery module to be detected, thereby realizing the all-round detection of the battery module. And then improve the rate of accuracy of detecting the battery safe state in the battery module from two aspects of omnibearing detection and elimination of initial pressure value influence.
Further, according to the above method embodiment, another embodiment of the present disclosure further provides a method for detecting a battery safety state, as shown in fig. 4, the method mainly includes:
201. and acquiring a first pressure change slope of a first pressure sensor and a second pressure change slope of a second pressure sensor in the battery module to be tested.
Specifically, an initial pressure value of the first pressure sensor and an initial pressure value of the second pressure sensor before the battery module to be tested is used, and a current pressure value of the first pressure sensor and a current pressure value of the second pressure sensor during the use process of the battery module to be tested are obtained; calculating the pressure change slope of the first pressure sensor according to the current pressure value of the first pressure sensor and the initial pressure value of the first pressure sensor; and calculating the pressure change slope of the second pressure sensor according to the current pressure value of the second pressure sensor and the initial pressure value of the second pressure sensor.
Illustratively, the initial pressure value of the first pressure sensor before the battery module to be tested is used is known as P0The initial pressure value of the second pressure sensor is P0And the current pressure value of the first pressure sensor in the using process of the battery module to be tested is P1The current pressure value of the second pressure sensor is P2Then the first pressure change slope of the first pressure sensor is (P)1-P0)/P0The first pressure change slope of the second pressure sensor is (P)2-P0)/P0. Before the battery module is used, the pressure values of all positions are equal, so that the initial pressure value of the first pressure sensor and the initial pressure value of the second pressure sensor are both P0。
When the current pressure change slope satisfies different ranges, the battery module is in different states, and the following step 202 and step 204 are executed to determine which state the battery module is in:
202. and respectively judging whether the first pressure change slope and the second pressure change slope meet the corresponding first state ranges.
The first state range is determined based on a pressure change slope obtained by a thermal runaway test of the test battery module, and the first state range is used for judging whether the battery module has a thermal runaway risk. That is, the first state range is a range with respect to the slope of the change in pressure. And because the first pressure sensor and the second pressure sensor are installed at different positions of the battery module, the pressure values of the two pressure sensors are different, so that the corresponding first state ranges may also be different, and it is required to respectively judge whether the first pressure change slope satisfies the corresponding first state range, and whether the second pressure change slope satisfies the corresponding first state range.
The first state range corresponding to the first pressure sensor is (K)3，K1) (ii) a The first state range corresponding to the second pressure sensor is (K)4，K2). That is, if the slope of the current pressure change of the first pressure sensor is greater than K3And is less than K1Or the current pressure change slope of the second pressure sensor is larger than K4And is less than K2Thermal runaway of the battery module is imminent.
K1The method comprises the following steps that in the process of carrying out a thermal runaway test on a test battery module, when the test battery module is subjected to thermal runaway, the pressure change slope of a first pressure sensor in the test battery module is obtained; k2The method comprises the following steps that in the process of carrying out a thermal runaway test on the test battery module, when the thermal runaway of the test battery module occurs, the pressure change slope of a second pressure sensor in the test battery module is measured.
For example, in a thermal runaway test process of a test battery module, when the test battery module is in thermal runaway, a pressure value of a first pressure sensor in the test battery module is P1 thermal runawayWhen the test battery module is not used, the initial pressure value of the first pressure sensor is P0 testThen K is1＝(P1 thermal runaway-P0 test)/P0 test. In the same way, K2＝(P2 thermal runaway-P0 test)/P0 test。
In addition, K3The maximum pressure change slope of the first pressure sensor is obtained in the normal working process of the test battery module; k4And the maximum pressure change slope of the second pressure sensor is obtained in the normal working process of the test battery module.
Specifically, K3The maximum value of the maximum pressure change slope of the first pressure sensor when the life cycle test is carried out on the test battery module and the maximum pressure change slope of the first pressure sensor when the limit working condition test is carried out on the test battery module; k4The maximum pressure change slope of the second pressure sensor when the test battery module is subjected to a life cycle test and the maximum pressure change slope of the second pressure sensor when the test battery module is subjected to a limit condition test are the maximum values.
The battery life cycle test is realized by a method of continuous charging and discharging; the limit conditions comprise condition data generated by limit use operations of the vehicle, such as rapid acceleration, rapid deceleration and the like.
For example, it is known that the maximum pressure value of the first pressure sensor when the life cycle test is performed on the test battery module is P1Life span, right maximum pressure value P of the first pressure sensor when the test battery module is subjected to limit condition test1The initial pressure value of the first pressure sensor is P under the limit working condition when the test battery module is not used0Test, then K3＝(max(P1 life time，P1 extreme condition)-P0 test)/P0 test. In the same way, K4＝(max(P2 life time，P2 limit condition)-P0 test)/P0 test。
203. And respectively judging whether the first pressure change slope and the second pressure change slope meet the corresponding second state ranges.
The second state range is determined based on a pressure change slope obtained by a thermal runaway test of the battery module to be tested, and is used for judging whether the battery module is in thermal runaway. The second state range corresponding to the first pressure sensor is [ K ]1, + ∞); the second state range corresponding to the second pressure sensor is [ K ]2, + ∞). That is, if the slope of the current pressure change of the first pressure sensor is greater than K1Or the current pressure change slope of the second pressure sensor is larger than K2The thermal runaway of the battery module is occurring.
204. And respectively judging whether the first pressure change slope and the second pressure change slope meet the respective corresponding third state ranges.
And the third state range is determined based on the pressure change slope obtained by the normal use test (such as a life cycle test and an extreme condition test) of the test battery module. When the first pressure change slope and the second pressure change slope both satisfy the corresponding third state ranges, it can be determined that the battery module is in a normal state, so it is necessary to determine whether the first pressure change slope and the second pressure change slope satisfy the respective corresponding third state ranges.
The third state range corresponding to the first pressure sensor is [0, K ]3](ii) a The third state range corresponding to the second pressure sensor is [0, K ]4]. That is, if the slope of the current pressure change of the first pressure sensor is less than or equal to K3And the current pressure change slope of the second pressure sensor is less than or equal to K4Then the battery module is in a normal state.
205. And if the first pressure change slope or the second pressure change slope meets the corresponding first state range, determining that the battery module to be tested is in a state with a thermal runaway risk, and outputting early warning information of the battery module to be tested with the thermal runaway risk.
If the first pressure change slope or the second pressure change slope meets the corresponding first state range, the battery module will generate a thermal runaway phenomenon, and in order to enable a driver to timely know the problem and timely control the thermal runaway, the battery module to be tested sends out early warning information of the thermal runaway risk (the thermal runaway is about to occur) of the battery module to be tested.
206. And if the first pressure change slope or the second pressure change slope meets a corresponding second state range, determining that the battery module to be tested is in a thermal runaway state, and outputting early warning information that the battery module to be tested is in a thermal runaway state.
207. And if the first pressure change slope and the second pressure change slope meet a corresponding third state range, determining that the battery module to be tested is in a normal state, and outputting normal reminding information of the battery module to be tested.
The reminding modes of step 205-207 during reminding may be the same or different, for example, when the battery module is normally reminded, the warning light may be turned on, and when thermal runaway is about to occur, the warning may be performed by voice, and when thermal runaway is occurring, besides performing voice warning, the warning information short message may also be sent to the designated terminal.
The method for detecting the safety state of the battery can feed back the early warning of the thermal runaway risk (namely the thermal runaway), the early warning of the thermal runaway and the normal state reminding one by one to a driver, so that the driver can timely know the real-time state of the battery module, and timely take protective measures for vehicles and personnel.
Further, according to the above method embodiment, another embodiment of the present disclosure further provides an apparatus for detecting a safety state of a battery, as shown in fig. 5, the apparatus including:
the acquiring unit 31 is configured to acquire a first pressure change slope of a first pressure sensor and a second pressure change slope of a second pressure sensor in a battery module to be tested, where the first pressure sensor and the second pressure sensor are installed at different positions in the battery module to be tested;
the determining unit 32 is configured to respectively determine whether the first pressure change slope and the second pressure change slope meet respective corresponding state ranges, and determine a safety state of the battery module to be tested according to a determination result;
and the output unit 33 is used for outputting the reminding information corresponding to the safety state.
In some embodiments, as shown in fig. 6, the determining unit 32 includes:
a first determining module 321, configured to determine whether the first pressure change slope and the second pressure change slope meet respective corresponding first state ranges; the first state range is determined based on a pressure change slope obtained by a thermal runaway test of the test battery module;
the first determining module 322 is configured to determine that the battery module to be tested is in a state with a risk of thermal runaway when the first pressure change slope or the second pressure change slope meets a corresponding first state range.
In some embodiments, the first state range for the first pressure sensor is (K)3，K1) (ii) a The first state range corresponding to the second pressure sensor is (K)4，K2)；
Wherein, K1The method comprises the following steps that in the process of carrying out a thermal runaway test on a test battery module, when the test battery module is subjected to thermal runaway, the pressure change slope of a first pressure sensor in the test battery module is obtained;
K2when the test battery module is subjected to thermal runaway test, the pressure change slope of a second pressure sensor in the test battery module is obtained;
K3the maximum pressure change slope of the first pressure sensor is obtained in the normal working process of the test battery module;
K4and the maximum pressure change slope of the second pressure sensor is obtained in the normal working process of the test battery module.
In some embodiments, K3The maximum value of the maximum pressure change slope of the first pressure sensor when the life cycle test is carried out on the test battery module and the maximum pressure change slope of the first pressure sensor when the limit working condition test is carried out on the test battery module;
K4the maximum pressure change slope of the second pressure sensor when the test battery module is subjected to a life cycle test and the maximum pressure change slope of the second pressure sensor when the test battery module is subjected to a limit condition test are the maximum values.
In some embodiments, as shown in fig. 6, the determining unit 32 includes:
a second determining module 323, configured to determine whether the first pressure change slope and the second pressure change slope satisfy respective corresponding second state ranges; the second state range is determined based on a pressure change slope obtained by a thermal runaway test of the test battery module;
the second determining module 324 is configured to determine that the battery module to be tested is in a thermal runaway state when the first pressure change slope or the second pressure change slope meets a corresponding second state range.
In some embodiments, the second state range corresponding to the first pressure sensor is [ K ]1, + ∞); the second state range corresponding to the second pressure sensor is [ K ]2，+∞)。
In some embodiments, as shown in fig. 6, the determining unit 32 includes:
a third determining module 325, configured to determine whether the first pressure change slope and the second pressure change slope satisfy respective corresponding third state ranges; the third state range is determined based on a pressure change slope obtained by a normal use test of the test battery module;
the third determining module 326 is configured to determine that the battery module to be tested is in a normal state when the first pressure change slope and the second pressure change slope satisfy a corresponding third state range.
In some embodiments, the third state range corresponding to the first pressure sensor is [0, K ]3](ii) a The third state range corresponding to the second pressure sensor is [0, K ]4]。
In some embodiments, as shown in fig. 6, the obtaining unit 31 includes:
an obtaining module 311, configured to obtain an initial pressure value of the first pressure sensor and an initial pressure value of the second pressure sensor before the battery module to be tested is used, and a current pressure value of the first pressure sensor and a current pressure value of the second pressure sensor in a use process of the battery module to be tested;
a calculating module 312, configured to calculate a first pressure change slope of the first pressure sensor according to a current pressure value of the first pressure sensor and an initial pressure value of the first pressure sensor; and calculating a second pressure change slope of the second pressure sensor according to the current pressure value of the second pressure sensor and the initial pressure value of the second pressure sensor.
In some embodiments, the first pressure sensor is located between an end plate of the battery module and the battery;
the second pressure sensor is positioned between the batteries of the battery module.
The device of detection battery safe state that this disclosed embodiment provided judges the safe state of electricity survey battery module through using the pressure variation slope, can eliminate the different influence of initial pressure value, through installing first pressure sensor and second pressure sensor respectively in the different positions of the battery module that awaits measuring, can judge two kinds of different pressure values in the battery module to the realization is to the all-round detection of battery module. And then improve the rate of accuracy of detecting the battery safe state in the battery module from two aspects of omnibearing detection and elimination of initial pressure value influence.
The device for detecting the safe state of the battery provided by the above embodiment can be used to execute the method for detecting the safe state of the battery provided by the embodiment of fig. 1 or fig. 2, and the related meanings and specific implementations can be referred to the related descriptions in the embodiment of fig. 1 or fig. 2, and will not be described in detail here.
Further, according to the above method embodiment, another embodiment of the present disclosure further provides a storage medium, where the storage medium includes a stored program, where when the program runs, a device in which the storage medium is located is controlled to execute the method for detecting the battery safety state according to the first aspect.
The storage medium may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
The program of storage in the storage medium that this disclosed embodiment provided judges the safe state of electricity survey battery module through using the pressure variation slope, can eliminate the different influence of initial pressure value, through install first pressure sensor and second pressure sensor respectively in the different positions of the battery module that awaits measuring, can judge two kinds of different pressure values in the battery module to the realization is to the all-round detection of battery module. And then improve the rate of accuracy of detecting the battery safe state in the battery module from two aspects of omnibearing detection and elimination of initial pressure value influence.
Further, according to the above method embodiment, another embodiment of the present disclosure also provides an apparatus for detecting a safety state of a battery, the apparatus including a storage medium; and one or more processors, the storage medium coupled with the processors, the processors configured to execute program instructions stored in the storage medium; the program instructions when executed perform the method for detecting the battery safety state of the first aspect.
The device of detection battery safe state that this disclosed embodiment provided judges the safe state of electricity survey battery module through using the pressure variation slope, can eliminate the different influence of initial pressure value, through installing first pressure sensor and second pressure sensor respectively in the different positions of the battery module that awaits measuring, can judge two kinds of different pressure values in the battery module to the realization is to the all-round detection of battery module. And then improve the rate of accuracy of detecting the battery safe state in the battery module from two aspects of omnibearing detection and elimination of initial pressure value influence.
Further, according to the above embodiment, another embodiment of the present disclosure also provides a vehicle including the apparatus as described above.
Embodiments of the present disclosure also provide a computer program product adapted to perform program code for initializing the following method steps when executed on an apparatus for detecting a battery safety state:
acquiring a first pressure change slope of a first pressure sensor and a second pressure change slope of a second pressure sensor in a battery module to be tested, wherein the first pressure sensor and the second pressure sensor are arranged at different positions in the battery module to be tested;
and respectively judging whether the first pressure change slope and the second pressure change slope meet the respective corresponding state ranges, determining the safety state of the battery module to be tested according to the judgment result, and outputting the reminding information corresponding to the safety state.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, embodiments of the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, embodiments of the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (15)

1. A method of detecting a safe state of a battery, the method comprising:
acquiring a first pressure change slope of a first pressure sensor and a second pressure change slope of a second pressure sensor in a battery module to be tested, wherein the first pressure sensor and the second pressure sensor are arranged at different positions in the battery module to be tested;
and respectively judging whether the first pressure change slope and the second pressure change slope meet the respective corresponding state ranges, determining the safety state of the battery module to be tested according to the judgment result, and outputting the reminding information corresponding to the safety state.
2. The method according to claim 1, wherein the step of respectively judging whether the first pressure change slope and the second pressure change slope satisfy the respective corresponding state ranges comprises the following steps of:
respectively judging whether the first pressure change slope and the second pressure change slope meet the corresponding first state ranges; the first state range is determined based on a pressure change slope obtained by a thermal runaway test of the test battery module;
and if the first pressure change slope or the second pressure change slope meets the corresponding first state range, determining that the battery module to be tested is in a state with a thermal runaway risk.
3. The method of claim 2, wherein the first pressure sensor corresponds to a first state range of (K)3，K1) (ii) a The first state range corresponding to the second pressure sensor is (K)4，K2)；
Wherein, K1The method comprises the following steps that in the process of carrying out a thermal runaway test on a test battery module, when the test battery module is subjected to thermal runaway, the pressure change slope of a first pressure sensor in the test battery module is obtained;
K2when the test battery module is subjected to thermal runaway test, the pressure change slope of a second pressure sensor in the test battery module is obtained;
K3the maximum pressure change slope of the first pressure sensor is obtained in the normal working process of the test battery module;
K4and the maximum pressure change slope of the second pressure sensor is obtained in the normal working process of the test battery module.
4. The method of claim 3, wherein K is3The maximum value of the maximum pressure change slope of the first pressure sensor when the life cycle test is carried out on the test battery module and the maximum pressure change slope of the first pressure sensor when the limit working condition test is carried out on the test battery module;
K4the maximum pressure change slope of the second pressure sensor when the test battery module is subjected to a life cycle test and the maximum pressure change slope of the second pressure sensor when the test battery module is subjected to a limit condition test are the maximum values.
5. The method according to claim 3, wherein the step of respectively judging whether the first pressure change slope and the second pressure change slope satisfy the respective corresponding state ranges, and the step of determining the safety state of the battery module to be tested according to the judgment result comprises the steps of:
respectively judging whether the first pressure change slope and the second pressure change slope meet respective corresponding second state ranges; the second state range is determined based on a pressure change slope obtained by a thermal runaway test of the test battery module;
and if the first pressure change slope or the second pressure change slope meets a corresponding second state range, determining that the battery module to be tested is in a thermal runaway state.
6. The method of claim 5, wherein the second state range for the first pressure sensor is [ K [ ]1, + ∞); the second state range corresponding to the second pressure sensor is [ K ]2，+∞)。
7. The method according to claim 3, wherein the step of respectively judging whether the first pressure change slope and the second pressure change slope satisfy the respective corresponding state ranges, and the step of determining the safety state of the battery module to be tested according to the judgment result comprises the steps of:
respectively judging whether the first pressure change slope and the second pressure change slope meet respective corresponding third state ranges; the third state range is determined based on a pressure change slope obtained by a normal use test of the test battery module;
and if the first pressure change slope and the second pressure change slope meet a corresponding third state range, determining that the battery module to be tested is in a normal state.
8. The method of claim 7, wherein the third state range for the first pressure sensor is [0, K ]3](ii) a The third state range corresponding to the second pressure sensor is [0, K ]4]。
9. The method of claim 1, wherein obtaining a first pressure change slope of a first pressure sensor and a second pressure change slope of a second pressure sensor in the battery module under test comprises:
acquiring an initial pressure value of the first pressure sensor and an initial pressure value of the second pressure sensor before the battery module to be tested is used, and acquiring a current pressure value of the first pressure sensor and a current pressure value of the second pressure sensor in the using process of the battery module to be tested;
calculating a first pressure change slope of the first pressure sensor according to the current pressure value of the first pressure sensor and the initial pressure value of the first pressure sensor;
and calculating a second pressure change slope of the second pressure sensor according to the current pressure value of the second pressure sensor and the initial pressure value of the second pressure sensor.
10. The method of any of claims 1-9, wherein the first pressure sensor is located between an end plate of the battery module and the battery;
the second pressure sensor is positioned between the batteries of the battery module.
11. An apparatus for detecting a safe state of a battery, the apparatus comprising:
the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring a first pressure change slope of a first pressure sensor and a second pressure change slope of a second pressure sensor in a battery module to be tested, and the first pressure sensor and the second pressure sensor are arranged at different installation positions in the battery module to be tested;
the determining unit is used for respectively judging whether the first pressure change slope and the second pressure change slope meet the respective corresponding state ranges, and determining the safety state of the battery module to be tested according to the judgment result;
and the output unit is used for outputting the reminding information corresponding to the safety state.
12. The apparatus of claim 11, wherein the determining unit comprises:
the first judgment module is used for respectively judging whether the first pressure change slope and the second pressure change slope meet the corresponding first state ranges; the first state range is determined based on a pressure change slope obtained by a thermal runaway test of the test battery module;
and the first determining module is used for determining that the battery module to be tested is in a state with a thermal runaway risk when the first pressure change slope or the second pressure change slope meets the corresponding first state range.
13. A storage medium comprising a stored program, wherein the program, when executed, controls an apparatus in which the storage medium is located to perform the method for detecting a safe state of a battery according to any one of claims 1 to 10.
14. An apparatus for detecting a safe state of a battery, the apparatus comprising a storage medium; and one or more processors, the storage medium coupled with the processors, the processors configured to execute program instructions stored in the storage medium; the program instructions when executed perform the method of detecting a battery safety state of any of claims 1 to 10.
15. A vehicle, characterized in that it comprises the device of claim 14.
CN201911376998.4A 2019-12-27 2019-12-27 Method and device for detecting safety state of battery Pending CN113054271A (en)

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013092398A (en) * 2011-10-24 2013-05-16 Toyota Motor Corp Secondary battery deterioration determination system and deterioration determination method
JP2014120335A (en) * 2012-12-17 2014-06-30 Mitsubishi Heavy Ind Ltd Battery system, battery monitoring device, and battery monitoring method
CN108134149A (en) * 2018-02-06 2018-06-08 华霆（合肥）动力技术有限公司 Battery modules and battery management system
CN108631015A (en) * 2017-03-20 2018-10-09 华为技术有限公司 Battery pack abnormal detector and battery pack method for detecting abnormality
CN108878698A (en) * 2017-05-09 2018-11-23 华为技术有限公司 Battery pack, battery energy storage system and electric car
CN109211562A (en) * 2018-10-11 2019-01-15 天能电池集团有限公司 It is a kind of for detecting the method and device of lead storage battery safety valve ageing properties
US20190033164A1 (en) * 2017-07-31 2019-01-31 Nio Usa, Inc. Systems and methods for diagnosing seal integrity in a battery
CN109786872A (en) * 2019-03-18 2019-05-21 北京航空航天大学 A kind of lithium ion battery thermal runaway early warning system and method
DE102017220644A1 (en) * 2017-11-17 2019-05-23 Audi Ag Energy storage module and method for operating an energy storage module
CN110261781A (en) * 2019-06-12 2019-09-20 天津市捷威动力工业有限公司 A kind of method for early warning of battery thermal runaway
CN110370984A (en) * 2019-06-26 2019-10-25 清华大学 Power battery thermal runaway method for early warning
CN110596610A (en) * 2018-06-12 2019-12-20 宁德时代新能源科技股份有限公司 Method and device for detecting charging and discharging electric quantity states of battery module and battery

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013092398A (en) * 2011-10-24 2013-05-16 Toyota Motor Corp Secondary battery deterioration determination system and deterioration determination method
JP2014120335A (en) * 2012-12-17 2014-06-30 Mitsubishi Heavy Ind Ltd Battery system, battery monitoring device, and battery monitoring method
CN108631015A (en) * 2017-03-20 2018-10-09 华为技术有限公司 Battery pack abnormal detector and battery pack method for detecting abnormality
CN108878698A (en) * 2017-05-09 2018-11-23 华为技术有限公司 Battery pack, battery energy storage system and electric car
US20190033164A1 (en) * 2017-07-31 2019-01-31 Nio Usa, Inc. Systems and methods for diagnosing seal integrity in a battery
DE102017220644A1 (en) * 2017-11-17 2019-05-23 Audi Ag Energy storage module and method for operating an energy storage module
CN108134149A (en) * 2018-02-06 2018-06-08 华霆（合肥）动力技术有限公司 Battery modules and battery management system
CN110596610A (en) * 2018-06-12 2019-12-20 宁德时代新能源科技股份有限公司 Method and device for detecting charging and discharging electric quantity states of battery module and battery
CN109211562A (en) * 2018-10-11 2019-01-15 天能电池集团有限公司 It is a kind of for detecting the method and device of lead storage battery safety valve ageing properties
CN109786872A (en) * 2019-03-18 2019-05-21 北京航空航天大学 A kind of lithium ion battery thermal runaway early warning system and method
CN110261781A (en) * 2019-06-12 2019-09-20 天津市捷威动力工业有限公司 A kind of method for early warning of battery thermal runaway
CN110370984A (en) * 2019-06-26 2019-10-25 清华大学 Power battery thermal runaway method for early warning

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Application publication date: 20210629