Battery thermal runaway detection method, device, system, vehicle and storage medium

Abstract

The application provides a battery thermal runaway detection method, device, system, vehicle and storage medium. The method comprises: obtaining sampling component state information; determining an effective state parameter of the battery monomer according to the sampling component state information; obtaining parameter data of the effective state parameter of the battery monomer; and determining whether the battery has thermal runaway according to the parameter data of the effective state parameter. In this way, when determining whether the battery has thermal runaway, the effective state parameter is determined in combination with the sampling component state information, so that the parameter used to determine whether the battery has thermal runaway is real and effective, the invalid or incorrect parameter is avoided to affect the determination result, the accuracy of thermal runaway detection is improved, and the false alarm risk is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of batteries, in particular to a battery thermal runaway detection method, device, system, vehicle and storage medium. BACKGROUND

[0002] The power source of a new energy vehicle is a battery pack assembled by power batteries. The battery pack structure is compact, heat is easy to accumulate and difficult to dissipate, local overheating or uneven temperature is easy to occur, which in turn easily causes battery performance degradation, capacity attenuation, and easily causes battery thermal runaway accidents.

[0003] However, the current battery thermal runaway detection method cannot accurately detect thermal runaway, and false positives often occur. SUMMARY

[0004] In view of the above problems, the present application provides a battery thermal runaway detection method, device, system, vehicle and storage medium to improve the reliability of thermal runaway detection and avoid false positives.

[0005] In the first aspect, the present application provides a battery thermal runaway detection method, the battery comprising battery monomers, the method comprising: obtaining sampling component state information; determining the effective state parameters of the battery monomers according to the sampling component state information; obtaining parameter data of the effective state parameters of the battery monomers; determining whether the battery has thermal runaway according to the parameter data of the effective state parameters.

[0006] In the technical solution provided by the present application, by obtaining sampling component state information, and then determining the effective state parameters of the battery monomers according to the sampling component state information, and determining whether the battery has thermal runaway according to the parameter data of the effective state parameters. In this way, when determining whether the battery has thermal runaway, the effective state parameters are determined in combination with the sampling component state information, so that the parameters used to determine whether the battery has thermal runaway are real and effective, avoiding the influence of invalid or false parameters on the determination result, improving the accuracy of thermal runaway detection, and reducing the risk of false positives.

[0007] In some embodiments, the sampling component state information includes: working state information of a sampling chip, working state information of a temperature sampling line and a voltage sampling line connected to the sampling chip.

[0008] In the above implementation process, the working state information of the sampling chip and the working state information of the temperature sampling line and the voltage sampling line connected to the sampling chip are combined to determine whether the battery has thermal runaway, thereby improving the accuracy of thermal runaway detection and reducing the risk of false positives.

[0009] In some embodiments, when the working state information of the sampling chip, the state information of the temperature sampling line, and the state information of the voltage sampling line are all in normal working states, the determining the effective state parameter of the battery cell according to the sampling component state information and the obtaining the parameter data of the effective state parameter of the battery cell include: determining that the effective state parameter of the battery cell is temperature and voltage; and obtaining temperature data and voltage data of the battery cell.

[0010] It should be understood that the temperature sampling line is used to collect temperature data of the battery cell, and the voltage sampling line is used to collect voltage data of the battery cell. The temperature data collected by the temperature sampling line and the voltage data collected by the voltage sampling line are aggregated in the sampling chip. When the working state information of the sampling chip, the state information of the temperature sampling line, and the state information of the voltage sampling line are all in normal working states, it indicates that the temperature data collected by the temperature sampling line and the voltage data collected by the voltage sampling line are all reliable. Therefore, in the above implementation process, when the working state information of the sampling chip, the state information of the temperature sampling line, and the state information of the voltage sampling line are all in normal working states, the battery is comprehensively judged to have thermal runaway based on the temperature data and the voltage data of the battery cell, so that whether thermal runaway occurs can be accurately determined, and the accuracy of thermal runaway detection is improved.

[0011] In some embodiments, the determining whether the battery has thermal runaway according to the parameter data of the effective state parameter includes: if the temperature data of the battery cell satisfies a preset temperature early warning condition, and the voltage data of the battery cell satisfies a preset voltage early warning condition, it is determined that the battery has thermal runaway; and if the temperature data of the battery cell does not satisfy the preset temperature early warning condition, or the voltage data of the battery cell does not satisfy the preset voltage early warning condition, it is determined that the battery does not have thermal runaway.

[0012] In the above implementation scheme, when the temperature data collected by the temperature sampling line and the voltage data collected by the voltage sampling line are all reliable, it is determined that thermal runaway occurs only when the temperature data of the battery cell satisfies a preset temperature early warning condition, and the voltage data of the battery cell satisfies a preset voltage early warning condition, thereby improving the detection reliability of thermal runaway failure.

[0013] In some embodiments, when the working state information of the sampling chip and the state information of the temperature sampling line are in normal working states, and the state information of the voltage sampling line is in an abnormal working state, the determining the effective state parameter of the battery cell according to the sampling component state information and the obtaining the parameter data of the effective state parameter of the battery cell include: determining that the effective state parameter of the battery cell is the temperature of the battery cell; and obtaining temperature data of the battery cell.

[0014] When the working state information of the sampling chip and the state information of the temperature sampling line are in a normal working state, and the state information of the voltage sampling line is in an abnormal working state, at this time, the temperature data is reliable, but the voltage data is unreliable, or the voltage data cannot be currently collected. Therefore, in the implementation scheme, the judgment of whether thermal runaway occurs is based on only the temperature data, which excludes the interference of unreliable voltage data, and improves the judgment reliability.

[0015] In some embodiments, the judgment of whether the battery has thermal runaway according to the parameter data of the effective state parameter of the battery cell includes: if the temperature data of the battery cell meets a preset temperature early warning condition, it is determined that the battery has thermal runaway; if the temperature data of the battery cell does not meet the preset temperature early warning condition, it is determined that the battery does not have thermal runaway.

[0016] In the implementation scheme, when only the temperature data is reliable, if the temperature data of the battery cell meets the preset temperature early warning condition, it is determined that the battery has thermal runaway, so that it can be ensured that the battery will be correctly judged when thermal runaway occurs, and the risk of missing report of thermal runaway will not occur.

[0017] In some embodiments, when the state information of the temperature sampling line is in an abnormal working state, and the working state information of the sampling chip and the state information of the voltage sampling line are in a normal working state, the determination of the effective state parameter of the battery cell according to the state information of the sampling component and the acquisition of the parameter data of the effective state parameter of the battery cell include: determining that the effective state parameter of the battery cell is the voltage of the battery cell; and acquiring the voltage data of the battery cell.

[0018] When the working state information of the sampling chip and the state information of the voltage sampling line are in a normal working state, and the state information of the temperature sampling line is in an abnormal working state, at this time, the voltage data is reliable, but the temperature data is unreliable, or the temperature data cannot be currently collected. Therefore, in the implementation scheme, the judgment of whether thermal runaway occurs is based on only the voltage data, which excludes the interference of unreliable temperature data, and improves the judgment reliability.

[0019] In some embodiments, the judgment of whether the battery has thermal runaway according to the parameter data of the effective state parameter of the battery cell includes: if the voltage data of the battery cell meets a preset voltage early warning condition, it is determined that the battery has thermal runaway; if the voltage data of the battery cell does not meet the preset voltage early warning condition, it is determined that the battery does not have thermal runaway.

[0020] In the implementation scheme, when only the voltage data is reliable, if the voltage data of the battery cell meets the preset voltage early warning condition, it is determined that the battery has thermal runaway, so that it can be ensured that the battery will be correctly judged when thermal runaway occurs, and the risk of missing report of thermal runaway will not occur.

[0021] In some embodiments, the sampling component state information comprises working state information of the sampling chip; when the working state information of the sampling chip is an abnormal working state, the determining the valid state parameter of the battery monomer according to the sampling component state information comprises: determining the valid state parameter of the battery monomer as a battery insulation resistance of a battery to which the battery monomer belongs; and the obtaining the parameter data of the valid state parameter of the battery monomer comprises: obtaining the insulation resistance data of the battery.

[0022] In the above implementation, when the working state information of the sampling chip is an abnormal working state, it indicates that all data from the sampling chip is unreliable, and since the thermal runaway occurs for a period of time, the insulation resistance of the battery will change under the action of thermal energy. Therefore, at this time, the insulation resistance data of the battery can be used to effectively determine whether the thermal runaway has occurred, thereby avoiding more serious consequences caused by the thermal runaway abnormality.

[0023] In some embodiments, the determining whether the battery has thermal runaway according to the parameter data of the valid state parameter comprises: if the insulation resistance data of the battery satisfies a preset insulation resistance warning condition, determining that the battery has thermal runaway; and if the insulation resistance data of the battery does not satisfy the preset insulation resistance warning condition, determining whether the battery has thermal runaway according to temperature data or voltage data of a preset T time period before the sampling chip is in the abnormal working state.

[0024] In the above implementation, if the insulation resistance data of the battery satisfies the preset insulation resistance warning condition, it can be directly determined that the battery has thermal runaway, thereby avoiding more serious consequences caused by the thermal runaway abnormality. However, since the thermal runaway reflected by the insulation resistance data of the battery has a lag (i.e., after a certain time of thermal runaway, the insulation resistance data will change to satisfy the preset insulation resistance warning condition), in order to discover the thermal runaway as early as possible, when the working state information of the sampling chip is an abnormal working state, but the insulation resistance data of the battery does not satisfy the preset insulation resistance warning condition, the battery can also be determined whether to have thermal runaway based on the temperature data or the voltage data of the preset T time period before the sampling chip is in the abnormal working state, thereby discovering the thermal runaway as early as possible, reducing the loss of thermal runaway, and reducing the risk of false negatives when determining the thermal runaway based on the insulation resistance data.

[0025] In some embodiments, the determining whether the battery is in thermal runaway according to the temperature data or the voltage data of the sampling chip in the preset T time period before the abnormal working state of the sampling chip includes: if the temperature data of the sampling chip in the preset T time period before the abnormal working state of the sampling chip meets a preset temperature early warning condition, or the voltage data of the sampling chip in the preset T time period before the abnormal working state of the sampling chip meets a preset voltage early warning condition, it is determined that the battery is in thermal runaway; if the temperature data of the sampling chip in the preset T time period before the abnormal working state of the sampling chip does not meet the preset temperature early warning condition, and the voltage data of the sampling chip in the preset T time period before the abnormal working state of the sampling chip does not meet the preset voltage early warning condition, it is determined that the battery is not in thermal runaway.

[0026] In the above implementation, when any one of the temperature data and the voltage data of the sampling chip in the preset T time period before the abnormal working state of the sampling chip meets the corresponding early warning condition, it is determined that thermal runaway occurs, so that thermal runaway can be found as early as possible, and the loss of thermal runaway is reduced.

[0027] In a second aspect, the present application also provides a battery thermal runaway detection method, the battery comprising a battery monomer, the method comprising: obtaining sampling component state information; determining whether the battery is in thermal runaway according to the sampling component state information.

[0028] In the above implementation, the sampling component state information is used to determine whether the battery is in thermal runaway, compared with the prior art, the influence of the sampling component state information on thermal runaway is considered, the accuracy of thermal runaway detection is improved to some extent, and the false alarm risk is reduced.

[0029] In some embodiments, the sampling component state information includes: working state information of a sampling chip, working state information of a temperature sampling line and a voltage sampling line connected with the sampling chip.

[0030] In the above implementation, the working state information of the sampling chip and the working state information of the temperature sampling line and the voltage sampling line connected with the sampling chip are combined to determine whether the battery is in thermal runaway, so that compared with the current scheme which does not consider the sampling component state information, the accuracy of thermal runaway detection is improved, and the false alarm risk is reduced.

[0031] In some embodiments, the determining whether the battery is in thermal runaway according to the sampling component state information includes: when the working state information of the sampling chip is a normal working state, and the state information of the temperature sampling line and the voltage sampling line is an abnormal working state, it is determined that the battery is in thermal runaway.

[0032] In the implementation solution, when the temperature data collected by the temperature sampling line and the voltage data collected by the voltage sampling line are both untrustworthy, it is directly determined that thermal runaway occurs, so that when thermal runaway really occurs, the thermal runaway is not missed, and the safety of battery management is improved.

[0033] In a second aspect, the application further provides a battery thermal runaway detection device, comprising: a first acquisition module configured to acquire sampling component state information; a determination module configured to determine an effective state parameter of the battery monomer according to the sampling component state information; the first acquisition module is further configured to acquire parameter data of the effective state parameter of the battery monomer; and a first judgment module configured to judge whether the battery has thermal runaway according to the parameter data of the effective state parameter.

[0034] In a third aspect, the application further provides a battery thermal runaway detection device, comprising: a second acquisition module configured to acquire sampling component state information; and a second judgment module configured to judge whether the battery has thermal runaway according to the sampling component state information.

[0035] In a fourth aspect, the application further provides a battery management system, comprising: any one of the battery thermal runaway detection devices.

[0036] In a fifth aspect, the application further provides a vehicle, characterized in that comprising the battery management system.

[0037] In a sixth aspect, the application further provides a computer readable storage medium, which stores a battery thermal runaway detection program, and the battery thermal runaway detection program can be executed by a processor to implement any one of the battery thermal runaway detection methods.

[0038] The above description is only a summary of the technical solutions of the application, in order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following will specifically describe the embodiments of the application. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments of the application, it should be understood that the following drawings only show some embodiments of the application, therefore should not be regarded as a limitation to the scope, for those skilled in the art, without paying creative labor, other related drawings can also be obtained according to these drawings.

[0040] Figure 1 The structure schematic diagram of a battery management system provided by the embodiments of the application;

[0041] Figure 2 A flowchart of a battery thermal runaway detection method provided in an embodiment of the present application is shown in FIG. 1.

[0042] Figure 3 A flowchart of another battery thermal runaway detection method provided in an embodiment of the present application is shown in FIG. 2.

[0043] Figure 4 A structural diagram of a battery thermal runaway detection device provided in an embodiment of the present application is shown in FIG. 3.

[0044] Figure 5 A structural diagram of another battery thermal runaway detection device provided in an embodiment of the present application is shown in FIG. 4. DETAILED DESCRIPTION

[0045] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0047] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0048] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0049] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0050] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0051] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or can be detachable connection, or can be integrated; can be mechanical connection, or can be electrical connection; can be direct connection, or can be indirect connection through an intermediate medium, or can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] At present, from the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing. With the continuous increase of market demand, the quality requirement of power battery is also higher and higher, and the safety management demand of battery is also higher and higher.

[0053] The applicant notices that the various methods for preventing thermal runaway provided on the market at present are mostly based on the voltage and / or temperature of the battery to determine whether a thermal runaway abnormality occurs. However, these methods are not very accurate in judging thermal runaway abnormalities, and false positives and false negatives often occur. The applicant has analyzed the thermal runaway detection methods on the market in detail and found that the thermal runaway detection methods on the market ignore the possibility that the sampling component (i.e. the component that collects data (such as voltage data, temperature data, etc.) used to determine whether a thermal runaway abnormality occurs) itself may be abnormal, thereby causing the thermal runaway detection to be based on incorrect data, and further causing inaccuracies, false positives, etc.

[0054] In order to solve the problem that the existing battery thermal runaway detection technology has low detection reliability and cannot meet the actual needs well, in the present application, the state information of the sampling component is introduced to determine whether the battery has a thermal runaway, thereby improving the problem that the existing technology ignores the possibility that the sampling component itself may be abnormal, and improving the reliability of thermal runaway detection.

[0055] Next, in order to facilitate understanding of the scheme of the present application, a brief introduction to the battery management system is given.

[0056] Reference is made to Figure 1As shown, the battery management system includes a BMU (Battery Management Unit), a sampling chip, a temperature sampling line, and a voltage sampling line. It should be noted that Figure 1 The battery is also shown in the figure, but the battery is shown as a management object of the battery management system, and is not limited to being a component of the battery management system.

[0057] The temperature sampling line and the voltage sampling line are connected between the battery and the sampling chip. The temperature sampling line is used to collect temperature data of each battery cell in the battery and transmit the temperature data to the sampling chip. The voltage sampling line is used to collect voltage data of each battery cell in the battery and transmit the voltage data to the sampling chip.

[0058] There is also a power supply line between the battery and the sampling chip, so that the battery can supply power to the sampling chip to maintain normal operation of the sampling chip.

[0059] The sampling chip is connected to the BMU, and can transmit the collected temperature data, voltage data, state information of the temperature sampling line, and state information of the voltage sampling line to the BMU. At the same time, the BMU can sense whether the working state of the sampling chip is normal.

[0060] It should be noted that the battery can include a plurality of battery cells, and the plurality of battery cells can be connected in series, in parallel, or in a mixed connection. The mixed connection means that there are both series and parallel connections among the plurality of battery cells. The plurality of battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the plurality of battery cells are accommodated in a box or an outer package to form a battery. Of course, the battery can also be in the form of a battery module composed of a plurality of battery cells connected in series, in parallel, or in a mixed connection, and a plurality of battery modules are connected in series, in parallel, or in a mixed connection to form a whole and are accommodated in a box or an outer package. The battery can also include other structures, for example, the battery can also include a busbar component for realizing electrical connection between the plurality of battery cells.

[0061] Each battery cell can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes. The battery cell refers to the smallest unit that constitutes the battery.

[0062] Next, please refer to Figure 2 As shown, Figure 2 A battery thermal runaway detection method provided by the embodiment of the application is shown, which includes the following steps:

[0063] S201: Obtain the state information of the sampling component.

[0064] S202: Determine the effective state parameter of the battery cell according to the state information of the sampling component.

[0065] S203: Obtain parameter data of the effective state parameter of the battery monomer.

[0066] S204: Determine whether the battery has thermal runaway according to the parameter data of the effective state parameter.

[0067] In the embodiments of the present application, by obtaining the sampling component state information, and then determining the effective state parameter of the battery monomer according to the sampling component state information, whether the battery has thermal runaway is determined according to the parameter data of the effective state parameter. In this way, compared with the current scheme that does not consider the sampling component state information, the sampling component state information is combined to determine whether the battery has thermal runaway, so that the parameter used to determine whether the battery has thermal runaway is real and effective, avoiding the influence of invalid or false parameters on the determination result, improving the accuracy of thermal runaway detection, and reducing the risk of false positives.

[0068] It should be noted that in the embodiments of the present application, the battery thermal runaway detection method can be implemented by the BMU in the battery management system.

[0069] It should be further noted that in the embodiments of the present application, the sampling component state information can include: working state information of the sampling chip, working state information of the temperature sampling line and the voltage sampling line connected with the sampling chip. Thus, by combining the working state information of the sampling chip, the temperature sampling line and the voltage sampling line, whether the battery has thermal runaway is determined, compared with the current scheme that does not consider the sampling component state information, the accuracy of thermal runaway detection is further improved, and the risk of false positives is reduced.

[0070] It should be noted that in the embodiments of the present application, the working state information includes two kinds of normal working state and abnormal working state. The sampling chip can determine the working state information of the temperature sampling line and the voltage sampling line according to whether the temperature sampling line and the voltage sampling line can normally upload data. And the BMU can determine the working state information of the sampling chip according to whether the sampling chip can normally upload data.

[0071] In the embodiments of the present application, when the working state information of the sampling chip, the state information of the temperature sampling line, and the state information of the voltage sampling line are all in the normal working state, it indicates that the temperature data collected by the temperature sampling line and the voltage data collected by the voltage sampling line are all reliable, at this time, the effective state parameter of the battery monomer can be determined as temperature and voltage, so as to obtain the temperature data and the voltage data of the battery monomer.

[0072] At this time, in an implementation of the embodiment of the present application, if the temperature data of the battery monomer satisfies the preset temperature early warning condition, and the voltage data of the battery monomer satisfies the preset voltage early warning condition, it can be determined that the battery has thermal runaway. On the contrary, if the temperature data of the battery monomer does not satisfy the preset temperature early warning condition, or the voltage data of the battery monomer does not satisfy the preset voltage early warning condition, it can be determined that the battery does not have thermal runaway.

[0073] In the above manner, when the temperature data collected by the temperature sampling line and the voltage data collected by the voltage sampling line are both reliable, the thermal runaway is determined only when the temperature data of the battery monomer satisfies the preset temperature early warning condition, and the voltage data of the battery monomer also satisfies the preset voltage early warning condition, which improves the detection reliability of the thermal runaway fault and reduces the risk of false positives.

[0074] It should be noted that in the embodiment of the present application, the preset temperature early warning condition can be but is not limited to at least one of the following:

[0075] The temperature difference between any battery monomer in the battery and other battery monomers in the battery is greater than a preset temperature difference threshold;

[0076] The temperature value of any battery monomer in the battery is higher than a preset temperature warning value;

[0077] The temperature rise rate (i.e. the temperature growth value per unit time) of any battery monomer in the battery is higher than a preset temperature rise rate warning value.

[0078] The specific values of the preset temperature difference threshold, the preset temperature warning value, and the preset temperature rise rate warning value can be set by engineers according to actual needs or after a large number of experiments, and are not limited in the embodiment of the present application.

[0079] It should also be noted that in the embodiment of the present application, the preset voltage early warning condition can be but is not limited to at least one of the following:

[0080] The voltage change rate (i.e. the voltage change value per unit time) of any battery monomer in the battery is higher than a preset voltage change rate warning value;

[0081] The voltage change extreme value (i.e. the minimum voltage value appearing in the process of voltage extreme change) of any battery monomer in the battery is lower than a preset voltage warning value.

[0082] The specific values of the preset voltage change rate warning value and the preset voltage warning value can also be set by engineers according to actual needs or after a large number of experiments, and are not limited in the embodiment of the present application.

[0083] In the embodiment of the present application, when the working state information of the sampling chip and the state information of the temperature sampling line are normal working states, and the state information of the voltage sampling line is an abnormal working state, it indicates that the temperature data collected by the current temperature sampling line is reliable, but the voltage data collected by the voltage sampling line is unreliable. At this time, the effective state parameter of the battery monomer can be determined as temperature, so as to obtain the temperature data of the battery monomer. At this time, whether thermal runaway occurs can be determined according to the temperature data only, so as to exclude the interference of unreliable voltage data and improve the determination reliability.

[0084] At this time, in a feasible implementation manner of the embodiment of the present application, if the temperature data of the battery monomer satisfies the preset temperature early warning condition, it can be determined that the battery has thermal runaway. On the contrary, if the temperature data of the battery monomer does not satisfy the preset temperature early warning condition, it can be determined that the battery has no thermal runaway.

[0085] In this way, when the voltage data collected by the voltage sampling line is unreliable, if the temperature data of the battery monomer satisfies the preset temperature early warning condition, it is determined that the battery has thermal runaway, so that it can be ensured that the thermal runaway will be correctly determined when it occurs, and there is no risk of missing report of thermal runaway.

[0086] In the embodiment of the present application, when the working state information of the sampling chip and the state information of the voltage sampling line are normal working states, and the state information of the temperature sampling line is an abnormal working state, it indicates that the voltage data collected by the current voltage sampling line is reliable, but the temperature data collected by the temperature sampling line is unreliable. At this time, the effective state parameter of the battery monomer can be determined as voltage, so as to obtain the voltage data of the battery monomer. At this time, whether thermal runaway occurs can be determined according to the voltage data only, so as to exclude the interference of unreliable temperature data and improve the determination reliability.

[0087] At this time, in a feasible implementation manner of the embodiment of the present application, if the voltage data of the battery monomer satisfies the preset voltage early warning condition, it can be determined that the battery has thermal runaway. On the contrary, if the voltage data of the battery monomer does not satisfy the preset voltage early warning condition, it can be determined that the battery has no thermal runaway.

[0088] In this way, when the temperature data collected by the temperature sampling line is unreliable, if the voltage data of the battery monomer satisfies the preset voltage early warning condition, it is determined that the battery has thermal runaway, so that it can be ensured that the thermal runaway will be correctly determined when it occurs, and there is no risk of missing report of thermal runaway.

[0089] In the embodiment of the present application, if the working state information of the sampling chip is the abnormal working state, at this time, due to the abnormality of the sampling chip, the temperature sampling line and the voltage sampling line are abnormal or not, the sampling chip cannot transmit data or the transmitted data is considered to be not reliable. In this case, the effective state parameter of the battery monomer can be determined as the battery insulation resistance of the battery to which the battery monomer belongs, so as to obtain the insulation resistance data of the battery, and the thermal runaway of the battery is judged based on the insulation resistance data.

[0090] It should be noted that in the embodiment of the present application, the BMU of the battery management system can also be connected with the external insulator part of the battery, so as to detect the insulation resistance data of the battery.

[0091] In an optional implementation of the embodiment of the present application, it can be judged whether the insulation resistance data of the battery meets the preset insulation resistance warning condition. If it meets, it can be determined that the battery has thermal runaway; otherwise, it can be determined that the battery has no thermal runaway.

[0092] It should be noted that since the thermal runaway reflected by the insulation resistance data of the battery has hysteresis (i.e. after a certain time of thermal runaway, the insulation resistance data will change to meet the preset insulation resistance warning condition). Then, in order to discover the thermal runaway as early as possible, in another optional implementation of the embodiment of the present application, it can be judged whether the insulation resistance data of the battery meets the preset insulation resistance warning condition. If it meets, it can be determined that the battery has thermal runaway; if it does not meet, it can be judged whether the battery has thermal runaway according to the temperature data or voltage data in the preset T time period before the sampling chip is in the abnormal working state, so as to discover the occurrence of thermal runaway as early as possible, reduce the loss of thermal runaway, and can reduce the risk of false negatives when judging thermal runaway based on insulation resistance data.

[0093] For example, when the temperature data in the preset T time period before the sampling chip is in the abnormal working state meets the preset temperature warning condition, or the voltage data in the preset T time period before the sampling chip is in the abnormal working state meets the preset voltage warning condition, it is determined that the battery has thermal runaway.

[0094] If the temperature data in the preset T time period before the sampling chip is in the abnormal working state does not meet the preset temperature warning condition, and the voltage data in the preset T time period before the sampling chip is in the abnormal working state also does not meet the preset voltage warning condition, it is determined that the battery has no thermal runaway.

[0095] In this way, when any one of the temperature data and the voltage data in the preset T time period before the sampling chip is in the abnormal working state meets the corresponding warning condition, it is determined that thermal runaway occurs, so as to discover thermal runaway as early as possible and reduce the loss of thermal runaway.

[0096] It should be noted that in the embodiments of the present application, the insulation resistance early warning condition can be but is not limited to at least one of the following:

[0097] The current insulation resistance value is lower than the preset insulation resistance warning value;

[0098] The insulation resistance value suddenly becomes smaller, and the rate of the decrease is greater than the preset insulation resistance change rate warning value.

[0099] The specific values of the insulation resistance warning value and the insulation resistance change rate warning value can be set by engineers according to actual needs or after a large number of experiments, and are not limited in the embodiments of the present application.

[0100] It should also be noted that in the embodiments of the present application, the specific value of the preset T time period can be set by engineers according to actual needs, for example, it can be set to within 1 hour before the sampling chip is in an abnormal working state.

[0101] It should be understood that in the embodiments of the present application, in addition to determining the effective state parameter of the battery monomer based on the sampling component state information, and then determining whether the battery is in thermal runaway based on the parameter data of the effective state parameter, the battery can also be directly determined to be in thermal runaway based on the sampling component state information. Please refer to Figure 3 , which shows another battery thermal runaway detection method provided by the embodiments of the present application, comprising: Figure 3 , which shows another battery thermal runaway detection method provided by the embodiments of the present application, comprising:

[0102] S301: Obtain sampling component state information.

[0103] S302: Determine whether the battery is in thermal runaway according to the sampling component state information.

[0104] Similarly, the above-mentioned battery thermal runaway detection method can also be implemented by the BMU in the battery management system.

[0105] Similarly, the sampling component state information can include working state information of the sampling chip, working state information of the temperature sampling line and the voltage sampling line connected with the sampling chip.

[0106] At this time, if the working state information of the sampling chip is in a normal working state, and the state information of the temperature sampling line and the voltage sampling line is in an abnormal working state, it is determined that the battery is in thermal runaway. In this way, when the temperature data collected by the temperature sampling line and the voltage data collected by the voltage sampling line are both unreliable, it is directly determined that thermal runaway occurs, so that when thermal runaway really occurs, the missed report of thermal runaway can be avoided, and the safety of battery management is improved.

[0107] It should be noted that the two battery thermal runaway detection methods described above can be applied to the battery management system at the same time, so as to achieve a more complete thermal runaway detection effect.

[0108] The battery thermal runaway detection method provided by the embodiment of the application, compared with the prior art scheme which does not consider the state information of the sampling component, combines the state information of the sampling component when judging whether the battery has thermal runaway, so that the parameters used to judge whether the battery has thermal runaway are real and effective, avoiding the influence of invalid or false parameters on the judgment result, improving the accuracy of thermal runaway detection, and reducing the risk of false positives.

[0109] Next, taking a more specific implementation process as an example, the technical solutions of the application are further illustrated.

[0110] The whole battery thermal runaway detection process includes:

[0111] S1, the BMU judges whether the working state of the sampling chip is normal; if normal, step S2 is executed; if abnormal, step S7 is executed.

[0112] S2, if the working state of the sampling chip is normal, it is judged whether the working states of the temperature sampling line and the voltage sampling line are normal. If the working states of the temperature sampling line and the voltage sampling line are normal, step S3 is executed; if the temperature sampling line is normal and the voltage sampling line is abnormal, step S4 is executed; if the voltage sampling line is normal and the temperature sampling line is abnormal, step S5 is executed; if the voltage sampling line and the temperature sampling line are both abnormal, step S6 is executed.

[0113] S3, it is judged whether the voltage data collected by the voltage sampling line meets any one of the following preset voltage early warning conditions:

[0114] The voltage change rate of any battery monomer in the battery is higher than a preset voltage change rate warning value;

[0115] The voltage change extreme value of any battery monomer in the battery is lower than a preset voltage warning value.

[0116] At the same time, it is judged whether the temperature data collected by the temperature sampling line meets any one of the following preset temperature early warning conditions:

[0117] The temperature difference between any battery monomer in the battery and other battery monomers in the battery is greater than a preset temperature difference threshold;

[0118] The temperature value of any battery monomer in the battery is higher than a preset temperature warning value;

[0119] The temperature rise rate of any battery monomer in the battery is higher than a preset temperature rise rate warning value.

[0120] If the voltage data collected by the voltage sampling line meets any of the above-mentioned preset voltage early warning conditions, and the temperature data collected by the temperature sampling line meets any of the above-mentioned preset temperature early warning conditions, it is determined that thermal runaway occurs, and the reporting of the thermal runaway anomaly is performed.

[0121] If the voltage data collected by the voltage sampling line does not meet any of the above-mentioned preset voltage early warning conditions, or the temperature data collected by the temperature sampling line does not meet any of the above-mentioned preset temperature early warning conditions, it is determined that thermal runaway does not occur.

[0122] S4, if the sampling chip working state is normal, the temperature sampling line is normal, and the voltage sampling line is abnormal, it is determined whether the temperature data collected by the temperature sampling line meets any of the above-mentioned preset temperature early warning conditions.

[0123] If yes, it is determined that thermal runaway occurs, and the reporting of the thermal runaway anomaly is performed. If none of the preset temperature early warning conditions is met, it is determined that thermal runaway does not occur.

[0124] S5, if the sampling chip working state is normal, the voltage sampling line is normal, and the temperature sampling line is abnormal, it is determined whether the voltage data collected by the voltage sampling line meets any of the above-mentioned preset voltage early warning conditions.

[0125] If yes, it is determined that thermal runaway occurs, and the reporting of the thermal runaway anomaly is performed. If none of the preset voltage early warning conditions is met, it is determined that thermal runaway does not occur.

[0126] S6, if the sampling chip working state is normal, and both the voltage sampling line and the temperature sampling line are abnormal, it is determined that thermal runaway occurs, and the reporting of the thermal runaway anomaly is performed.

[0127] S7, if the sampling chip working state is abnormal, the latest insulation resistance data of the battery is obtained.

[0128] S8, it is determined whether the insulation resistance data meets any of the following preset insulation resistance early warning conditions:

[0129] The current insulation resistance value is lower than the preset insulation resistance warning value;

[0130] The insulation resistance value suddenly becomes smaller, and the rate of the decrease is greater than the preset insulation resistance change rate warning value.

[0131] If yes, step S9 is performed. If none of the insulation resistance early warning conditions is met, step S10 is performed.

[0132] S9, it is determined that thermal runaway occurs, and the reporting of the thermal runaway anomaly is performed.

[0133] S10. Determine whether the temperature data within the preset T time period before the sampling chip becomes abnormal meets any of the above-mentioned preset temperature warning conditions, and simultaneously determine whether the voltage data within the preset T time period before the sampling chip becomes abnormal meets any of the above-mentioned preset voltage warning conditions.

[0134] If the temperature data within the preset T time period before the sampling chip is abnormal meets any of the above preset temperature warning conditions, thermal runaway is determined to have occurred and the thermal runaway abnormality is reported.

[0135] If the voltage data in the preset T time period before the sampling chip is abnormal meets any of the above preset voltage warning conditions, thermal runaway is determined to have occurred and the thermal runaway abnormality is reported.

[0136] If the temperature data within the preset T time period before the sampling chip becomes abnormal does not meet any of the above preset temperature warning conditions, and the voltage data within the preset T time period before the sampling chip becomes abnormal does not meet any of the above preset voltage warning conditions, it is determined that thermal runaway has not occurred.

[0137] Based on the same inventive concept, the present application also provides two battery thermal runaway detection devices 400 and 500. Figure 4 and Figure 5 As shown, Figure 4 Shows the use of Figure 2 The battery thermal runaway detection device 400 of the method shown, Figure 5 Shows the use of Figure 3 The battery thermal runaway detection device 500 of the method shown is shown. It should be understood that the specific functions of the devices 400 and 500 can be found in the description above. To avoid repetition, detailed descriptions are omitted here. The devices 400 and 500 include at least one software function module that can be stored in a memory in the form of software or firmware or fixed in the operating system of the devices 400 and 500. Specifically:

[0138] See also Figure 4 As shown, the apparatus 400 includes: a first acquisition module 401, a determination module 402 and a first judgment module 403.

[0139] A first acquisition module 401 is used to acquire sampling component status information;

[0140] A determination module 402 is configured to determine effective state parameters of the battery cell according to the sampling component state information;

[0141] The first acquisition module 401 is further configured to acquire parameter data of effective state parameters of the battery cell;

[0142] The first judgment module 403 is configured to judge whether thermal runaway occurs in the battery according to the parameter data of the effective state parameter.

[0143] In the embodiment of the present application, the sampling component state information includes: working state information of the sampling chip, working state information of a temperature sampling line and a voltage sampling line connected with the sampling chip.

[0144] In the first possible implementation manner in the embodiment of the present application, when the working state information of the sampling chip, the state information of the temperature sampling line and the state information of the voltage sampling line are all in normal working states, the determining module 402 is specifically configured to determine that the effective state parameter of the battery monomer is temperature and voltage; and the first obtaining module 401 is specifically configured to obtain temperature data and voltage data of the battery monomer.

[0145] In the first possible implementation manner, the first judging module 403 is specifically configured to: if the temperature data of the battery monomer satisfies a preset temperature early warning condition, and the voltage data of the battery monomer satisfies a preset voltage early warning condition, it is determined that the battery is in thermal runaway; if the temperature data of the battery monomer does not satisfy the preset temperature early warning condition, or the voltage data of the battery monomer does not satisfy the preset voltage early warning condition, it is determined that the battery is not in thermal runaway.

[0146] In the second possible implementation manner in the embodiment of the present application, when the working state information of the sampling chip and the state information of the temperature sampling line are in normal working states, and the state information of the voltage sampling line is in abnormal working state, the determining module 402 is specifically configured to determine that the effective state parameter of the battery monomer is the temperature of the battery monomer; and the first obtaining module 401 is specifically configured to obtain temperature data of the battery monomer.

[0147] In the second possible implementation manner, the first judging module 403 is specifically configured to: if the temperature data of the battery monomer satisfies a preset temperature early warning condition, it is determined that the battery is in thermal runaway; if the temperature data of the battery monomer does not satisfy the preset temperature early warning condition, it is determined that the battery is not in thermal runaway.

[0148] In the third possible implementation manner in the embodiment of the present application, when the state information of the temperature sampling line is in abnormal working state, and the working state information of the sampling chip and the state information of the voltage sampling line are in normal working states, the determining module 402 is specifically configured to determine that the effective state parameter of the battery monomer is the voltage of the battery monomer; and the first obtaining module 401 is specifically configured to obtain voltage data of the battery monomer.

[0149] In the third implementation manner, the first determining module 403 is specifically configured to determine that the battery is in thermal runaway if the voltage data of the battery cell satisfies a preset voltage early warning condition; and determine that the battery is not in thermal runaway if the voltage data of the battery cell does not satisfy the preset voltage early warning condition.

[0150] In the fourth implementation manner, the sampling component state information includes working state information of a sampling chip; and when the working state information of the sampling chip is an abnormal working state, the determining module 402 is specifically configured to determine that the effective state parameter of the battery cell is a battery insulation resistance of a battery to which the battery cell belongs; and the first obtaining module 401 is specifically configured to obtain the insulation resistance data of the battery.

[0151] In an optional example of the fourth implementation manner, the first determining module 403 is specifically configured to determine that the battery is in thermal runaway if the insulation resistance data of the battery satisfies a preset insulation resistance early warning condition; and determine whether the battery is in thermal runaway according to temperature data or voltage data of the sampling chip within a preset T time period before the abnormal working state of the sampling chip if the insulation resistance data of the battery does not satisfy the preset insulation resistance early warning condition.

[0152] In the optional example, the first determining module 403 is specifically configured to determine that the battery is in thermal runaway if the temperature data of the sampling chip within the preset T time period before the abnormal working state satisfies a preset temperature early warning condition, or the voltage data of the sampling chip within the preset T time period before the abnormal working state satisfies a preset voltage early warning condition; and determine that the battery is not in thermal runaway if the temperature data of the sampling chip within the preset T time period before the abnormal working state does not satisfy the preset temperature early warning condition, and the voltage data of the sampling chip within the preset T time period before the abnormal working state does not satisfy the preset voltage early warning condition.

[0153] Referring to Figure 5 As shown in the figure, the apparatus 500 includes a second obtaining module 501 and a second determining module 502. Wherein:

[0154] The second obtaining module 501 is configured to obtain sampling component state information.

[0155] The second determining module 502 is configured to determine whether the battery is in thermal runaway according to the sampling component state information.

[0156] In the embodiments, the sampling component state information includes working state information of a sampling chip, working state information of a temperature sampling line and a voltage sampling line connected with the sampling chip.

[0157] In the embodiment of the present application, the second determining module 502 is specifically configured to determine that the battery is in thermal runaway when the working state information of the sampling chip is a normal working state and the state information of the temperature sampling line and the voltage sampling line is an abnormal working state.

[0158] It should be understood that, for the sake of brevity of description, some of the content described in the first embodiment is not repeated in the embodiments of the present application.

[0159] In the embodiments of the present application, a battery management system is also provided, which includes the battery thermal runaway detection device 400 and / or the battery thermal runaway detection device 500.

[0160] It should be understood that the specific structure of the battery management system can be as shown in Figure 1 The functional modules in the battery thermal runaway detection device 400 and / or the battery thermal runaway detection device 500 can be arranged in the BMU to implement the battery thermal runaway detection method.

[0161] It should be understood that the structure shown in Figure 1 is only schematic, and the battery management system can further include more or less components than those shown in Figure 1 , or have a different configuration from that shown in Figure 1 .

[0162] In the embodiments of the present application, a vehicle is also provided, which includes the battery management system.

[0163] It should be understood that the vehicle shown in the embodiments of the present application can be various types of vehicles using a power battery as an energy source.

[0164] In the embodiments of the present application, a computer readable storage medium, such as a floppy disk, an optical disk, a hard disk, a flash memory, a U disk, an SD (Secure Digital Memory Card) card, an MMC (Multimedia Card) card, etc., is also provided, and a battery thermal runaway detection program is stored in the computer readable storage medium. The battery thermal runaway detection program can be executed by one or more processors to implement the battery thermal runaway detection method. Details are not repeated here.

[0165] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. In particular, as long as there is no conflict in structure or execution sequence, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for detecting thermal runaway of a battery, wherein the battery comprises a battery cell, characterized in that: The method comprises: Acquire sampling component status information; wherein the sampling component status information includes: working status information of the sampling chip, working status information of the temperature sampling line and the voltage sampling line connected to the sampling chip; When the working state information of the sampling chip, the state information of the temperature sampling line, and the state information of the voltage sampling line are all in normal working states, determining that the effective state parameters of the battery cell are temperature and voltage; acquiring temperature data and voltage data of the battery cell; When the working state information of the sampling chip and the state information of the temperature sampling line are in a normal working state, and the state information of the voltage sampling line is in an abnormal working state, determining that the effective state parameter of the battery cell is the temperature of the battery cell; and acquiring the temperature data of the battery cell; When the state information of the temperature sampling line indicates an abnormal working state, and the working state information of the sampling chip and the state information of the voltage sampling line indicate a normal working state, determining that the effective state parameter of the battery cell is the voltage of the battery cell; and obtaining the voltage data of the battery cell; When the working state information of the sampling chip is an abnormal working state, determining that the effective state parameter of the battery cell is the battery insulation resistance of the battery to which the battery cell belongs; and obtaining insulation resistance data of the battery; Determine whether thermal runaway occurs in the battery according to parameter data of the effective state parameter.

2. The method according to claim 1, characterized in that Determining whether thermal runaway occurs in the battery according to parameter data of the effective state parameter includes: If the temperature data of the battery cell meets the preset temperature warning condition, and the voltage data of the battery cell meets the preset voltage warning condition, it is determined that the battery has thermal runaway; If the temperature data of the battery cell does not meet the preset temperature warning condition, or the voltage data of the battery cell does not meet the preset voltage warning condition, it is determined that the battery does not experience thermal runaway.

3. The method according to claim 1, characterized in that Determining whether thermal runaway occurs in the battery according to parameter data of the effective state parameter includes: If the temperature data of the battery cell meets the preset temperature warning condition, it is determined that the battery has thermal runaway; If the temperature data of the battery cell does not meet the preset temperature warning condition, it is determined that the battery does not experience thermal runaway.

4. The method according to claim 1, wherein Determining whether thermal runaway occurs in the battery according to parameter data of the effective state parameter includes: If the voltage data of the battery cell meets the preset voltage warning condition, it is determined that the battery has thermal runaway; If the voltage data of the battery cell does not meet the preset voltage warning condition, it is determined that the battery does not experience thermal runaway.

5. The method according to claim 1, wherein Determining whether thermal runaway occurs in the battery according to parameter data of the effective state parameter includes: If the insulation resistance data of the battery meets a preset insulation resistance warning condition, determining that the battery has thermal runaway; If the insulation resistance data of the battery does not meet the preset insulation resistance warning condition, it is determined whether the battery is thermally controlled according to the temperature data or voltage data within a preset T time period before the sampling chip is in the abnormal working state.

6. The method according to claim 5, characterized in that The determining whether thermal control occurs in the battery based on temperature data or voltage data within a preset T time period before the sampling chip is in an abnormal working state includes: If the temperature data within the preset T time period before the sampling chip is in the abnormal working state meets the preset temperature warning condition, or the voltage data within the preset T time period before the sampling chip is in the abnormal working state meets the preset voltage warning condition, it is determined that the battery has thermal runaway; If the temperature data within the preset T time period before the sampling chip is in the abnormal working state does not meet the preset temperature warning condition, and the voltage data within the preset T time period before the sampling chip is in the abnormal working state does not meet the preset voltage warning condition, it is determined that the battery does not have thermal runaway.

7. A method for detecting thermal runaway of a battery, wherein the battery comprises a battery cell, characterized in that: The method comprises: Acquiring sampling component status information, wherein the sampling component status information includes: working status information of the sampling chip, and working status information of the temperature sampling line and the voltage sampling line connected to the sampling chip; Determining whether thermal runaway occurs in the battery according to the sampling component status information includes: determining that thermal runaway occurs in the battery when the working status information of the sampling chip indicates a normal working state and the status information of the temperature sampling line and the voltage sampling line indicates an abnormal working state.

8. A battery thermal runaway detection device, characterized in that: include: A first acquisition module is configured to acquire sampling component status information, wherein the sampling component status information includes: working status information of the sampling chip, and working status information of the temperature sampling line and the voltage sampling line connected to the sampling chip; a determination module, configured to determine effective state parameters of the battery cell according to the sampling component state information; The first acquisition module is further configured to acquire parameter data of effective state parameters of the battery cell; a first judgment module, configured to judge whether thermal runaway occurs in the battery according to parameter data of the effective state parameter; Wherein, when the working state information of the sampling chip, the state information of the temperature sampling line, and the state information of the voltage sampling line are all in normal working state, the determining module is specifically used to determine that the effective state parameters of the battery cell are temperature and voltage; the first acquiring module is specifically used to acquire the temperature data and voltage data of the battery cell; When the working state information of the sampling chip and the state information of the temperature sampling line are in a normal working state, and the state information of the voltage sampling line is in an abnormal working state, the determining module is specifically used to determine that the effective state parameter of the battery cell is the temperature of the battery cell; and the first acquiring module is specifically used to acquire the temperature data of the battery cell; When the status information of the temperature sampling line indicates an abnormal working state, and the working state information of the sampling chip and the status information of the voltage sampling line indicate a normal working state, the determining module is specifically configured to determine that the effective state parameter of the battery cell is the voltage of the battery cell; and the first acquiring module is specifically configured to acquire the voltage data of the battery cell; The sampling component status information includes the working status information of the sampling chip; when the working status information of the sampling chip is an abnormal working state, the determination module is specifically used to determine that the effective state parameter of the battery cell is the battery insulation resistance of the battery to which the battery cell belongs; the first acquisition module is specifically used to obtain the insulation resistance data of the battery.

9. A battery thermal runaway detection device, characterized in that: include: A second acquisition module is configured to acquire sampling component status information, wherein the sampling component status information includes: working status information of the sampling chip, and working status information of the temperature sampling line and the voltage sampling line connected to the sampling chip; a second judgment module, configured to judge whether thermal runaway occurs in the battery according to the state information of the sampling component; The second judgment module is further configured to determine that thermal runaway occurs in the battery when the working status information of the sampling chip indicates a normal working status and the status information of the temperature sampling line and the voltage sampling line indicates an abnormal working status.

10. A battery management system, characterized in that: include: The battery thermal runaway detection device according to claim 8 or 9.

11. A vehicle, characterized in that: include: The battery management system as claimed in claim 10.

12. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a battery thermal runaway detection program, and the battery thermal runaway detection program can be executed by a processor to implement the battery thermal runaway detection method according to any one of claims 1 to 7.

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