Battery pack, power consumption device, battery pack detection method, and computer storage medium

Abstract

The present application provides a battery pack, a power consumption device, a detection method for a battery pack, and a computer storage medium, wherein the battery pack includes a battery core module including at least one battery core; a first collection module including at least one first collection unit, the first collection unit being installed in the battery core, the first collection unit being used to collect first operating data of the battery core; a data processing module connected to the first collection unit and used to perform thermal runaway detection on the battery core based on the first operating data and obtain a first detection result; and a second collection module installed outside the battery core module, which is activated when the first detection result indicates that there is a thermal runaway risk in any battery core, and after being activated, is used to collect second operating data of the battery core, the data processing module being further connected to the second collection module and further used to perform a second detection of whether there is a thermal runaway risk in the battery core based on the second operating data and obtain a second detection result.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202211292957.9, filed on October 21, 2022, entitled "Battery Pack, Power Consumption Device, Battery Pack Detection Method and Computer Storage Medium," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of new energy technology, and in particular to a battery pack, a power consumption device, a battery pack detection method, and a computer storage medium. [Background technology]

[0003] With the development of new energy technologies, the applications of batteries are becoming more and more widespread. However, due to various factors, batteries may experience thermal runaway, which may result in the release of large amounts of heat and harmful gases, leading to battery fire and even explosion. Summary of the Invention

[0004] The embodiments of the present application provide a battery pack, a power consumption device, a battery pack detection method, and a computer storage medium, the purpose of which is to provide a thermal runaway detection solution, which helps improve the safety of power consumption devices and personnel, and at the same time alleviates the problems of the related art, such as the relatively high thermal runaway detection error and the relatively short service life of temperature sensors.

[0005] On the one hand, the present application provides a battery pack, the battery pack comprising: a battery core module that may include at least one battery core; a first collection module, which may include at least one first collection unit, the first collection unit being installed in the battery core, the first collection unit being used to collect first operating data of the battery core; a data processing module connected to the first collecting unit, for performing thermal runaway detection on the battery core based on the first operating data, and obtaining a first detection result; a second collection module that is installed outside the battery core module, that is activated when the first detection result indicates that there is a risk of thermal runaway in any of the battery cores, and that is used to collect second operating data of the battery cores after being activated; The data processing module is further connected to the second collection module and is used to perform a second detection of whether there is a thermal runaway risk in the battery core based on the second operating data, and obtain a second detection result.

[0006] In these embodiments, by providing a battery core module, a first collection module, a second collection module, and a data processing module, the first collection module may include at least one first collection unit, the data processing module is connected to the first collection unit, and is used to perform thermal runaway detection on the battery cores based on the first operating data to obtain a first detection result, the second collection module is connected to the data processing module, and is activated when the first detection result indicates that a thermal runaway risk exists in any of the battery cores, and can collect second operating data of the battery cores after activation, and the data processing module can further perform a second detection of whether a thermal runaway risk exists in the battery cores based on the second operating data to obtain a second detection result. The first collection unit is installed inside the battery core, which enables direct collection of operating data inside the battery core and more realistically reflects the operating conditions inside the battery core. After determining that a thermal runaway risk exists based on the operating data inside the battery core, the second collection module outside the battery core module is activated, and a secondary detection is performed based on the second operating data collected by the second collection module. This two-stage detection, combining internal and external detection, improves the accuracy of thermal runaway early warning detection. In addition, the second collection module is activated only when the first detection result indicates that a thermal runaway risk exists, and the second collection module intermittently collects second operating data, thereby extending the service life of the second collection module.

[0007] Optionally, the battery pack The battery may further include a thermal management module connected to the data processing module for balancing the temperature of the battery cores when the first detection result indicates that a thermal runaway risk exists in any of the battery cores.

[0008] In these embodiments, by balancing the battery core temperature after the thermal management module generates a first early warning (i.e., the first detection result indicates that there is a risk of thermal runaway in one of the battery cores), the operation to reduce the battery core temperature can be performed earlier than in related art, which helps to reduce the risk of thermal runaway in the battery core and improve the safety of use of the battery core.

[0009] Optionally, the first collection unit comprises: a first temperature collection unit used to collect first temperature data of the battery core, wherein the first operating data may include the first temperature data; It may also include a data processing module that performs thermal runaway detection on the battery core using first temperature data, and if the first temperature data meets a thermal runaway condition, indicates the first detection result as indicating that there is a thermal runaway risk in the battery core.

[0010] These embodiments provide a selective thermal runaway early warning method for the first temperature collection unit built into the battery core, which helps to provide a thermal runaway detection method with high accuracy and sensitivity, helps to realize early thermal runaway management of the battery, improves the accuracy of thermal runaway early warning, and buys more time for subsequent thermal management and thermal runaway early warning notification, thereby improving the technical problem of serious delays in thermal runaway early warning in related technologies.

[0011] Optionally, the first collection unit may further include a primary collection unit; a primary collection unit used to collect third operating data other than the first temperature data of the battery core, wherein the first operating data may include the third operating data; The data processing module is used to perform thermal runaway detection on the battery core according to the first temperature data when the third operating data meets a corresponding type of data detection condition.

[0012] In these embodiments, before detecting thermal runaway of the battery core based on the first temperature data, a data detection condition judgment of the third operating data is added to eliminate possible abnormalities in the first temperature collection unit, improve the accuracy of detecting thermal runaway of the battery core, and at the same time provide a reference basis for finding the root cause of thermal runaway of the battery core.

[0013] Optionally, the battery core may include a case and plates housed in the case, and the primary collection unit may include: a pressure collecting unit may be included, the pressure collecting unit corresponds to the first temperature collecting unit, the pressure collecting unit is attached to the inner surface of the case and / or the electrode plate, the pressure collecting unit is used to collect pressure data of the battery core, and the third operating data may include the pressure data; Here, if the pressure data is greater than the pressure threshold, the third operating data meets the corresponding type of data detection condition.

[0014] In these embodiments, taking into account the situation where the internal pressure of the battery core is too high, causing the internal temperature of the battery core to rise and further increasing the risk of thermal runaway, the combination of the built-in pressure collection unit and the first temperature collection unit can realize a first early warning of local thermal runaway, and in assessing the risk of thermal runaway, can find the root cause of thermal runaway inside the battery core and provide reference for subsequent analysis and detection of thermal runaway.

[0015] Optionally, the data processing module is further used to indicate the first detection result as a power receiving abnormality of the battery core when the pressure data is greater than a pressure threshold and the first temperature data does not meet a temperature runaway condition.

[0016] In these embodiments, the data processing module analyzes the situation where the pressure in the battery core is too high, and determines whether it is thermal runaway caused by a local force abnormality or a local force abnormality, thereby achieving accurate abnormality analysis of the internal pressure of the battery core being too high.

[0017] Optionally, the battery core may include a bare cell, a case, and a top cover, the bare cell being accommodated in an accommodating space formed by being surrounded by the case and the top cover, and the primary collecting unit being: and a built-in air pressure and gas collection unit disposed between the top cover and the bare cell, the built-in air pressure and gas collection unit being used to collect air pressure data and at least one type of gas concentration within the case; Here, if the atmospheric pressure data is greater than the atmospheric pressure threshold and the concentration of any type of gas is greater than the concentration threshold of the corresponding type, the third operating data meets the data detection condition of the corresponding type.

[0018] In these embodiments, by incorporating an internal pressure and gas collection unit inside the battery core, it is possible to better detect whether a large amount of gas generation has occurred inside the battery core, and by combining this with changes in the first temperature data, it is possible to accurately determine whether the battery core has thermal runaway due to abnormal gas generation.

[0019] Optionally, the data processing module is further used to indicate the first detection result as a gas generation abnormality in the battery core when the air pressure data is greater than the air pressure threshold, the first temperature data does not meet the temperature runaway condition, and the concentration of any type of gas is greater than the concentration threshold of the corresponding type.

[0020] In these embodiments, thermal runaway or gas generation abnormality due to gas generation can be identified, and accurate abnormal analysis of gas generation inside the battery core can be realized, thereby discovering the cause of thermal runaway and providing advantageous reference basis for subsequent detection and analysis of thermal runaway in the battery core.

[0021] Optionally, the battery pack The battery may further include a third collecting module for collecting electrical data corresponding to the battery core, and the electrical data may include at least one of a voltage value, a current value of a circuit in which the battery core is located, and an insulation resistance value of the battery core; Here, if the insulation resistance value is smaller than the resistance threshold, the current value is greater than the current threshold, or the rate of decrease in the voltage value is greater than the rate threshold, the third operating data meets the corresponding type of data detection condition.

[0022] These examples consider the risk of thermal runaway caused by electrical factors in the battery core, explore the root causes of thermal runaway occurrence within the battery core, and provide reference for subsequent thermal runaway analysis and detection.

[0023] Optionally, the data processing module is further used to indicate the first detection result as a short circuit abnormality of the battery core when it determines based on the electrical data that the third operating data meets the corresponding type of data detection condition and the first temperature data does not meet the temperature runaway condition.

[0024] In these embodiments, after the electrical data is evaluated, it is determined whether the first temperature data meets the temperature runaway condition, and whether there is a risk of thermal runaway in the battery core due to a short circuit abnormality in the battery core, thereby realizing accurate abnormality analysis of the battery core short circuit. The electrical data is combined with gas generation and the internal pressure of the battery core to form a primary signal collection system, which triggers the determination of whether the first temperature data meets the temperature runaway condition, and from the various root causes of thermal runaway occurrence, it is possible to realize early warning of the risk of thermal runaway, and at the same time, to comprehensively discover the triggers of thermal runaway occurrence.

[0025] Optionally, the second collection module: The battery may further include a second temperature collection unit that is activated when the first detection result indicates that a thermal runaway risk exists in any of the battery cores and that collects second temperature data of the battery cores after the activation, and the second operating data may include the second temperature data; The data processing module is further used for indicating the second detection result that there is a secondary thermal runaway risk in the battery core when the second temperature data is greater than an external temperature threshold value.

[0026] In these embodiments, the installation of the second temperature collecting unit provides an optional implementation method for the data processing module to implement secondary detection of thermal runaway risk based on the second operating data. On the one hand, it can capture thermal runaway risk signals emanating from within the battery cores, thereby timely determining the degree of thermal runaway risk emanating from within the battery cores. On the other hand, it can reflect changes in external signals due to changes in external conditions, such as external high temperatures, thereby realizing early warning of thermal runaway risk caused by external factors. Furthermore, the second temperature collecting unit is only activated when the first detection result indicates that a thermal runaway risk exists in any of the battery cores, thereby avoiding the discontinuous operation of the second temperature collecting unit and significantly improving the actual operating life of the second temperature collecting unit.

[0027] Optionally, the second collection module: The battery may further include an external air pressure and gas collection unit that is activated when the first detection result indicates that there is a risk of thermal runaway in any of the battery cores, and that collects external air pressure data of the battery core module and the concentration of at least one type of gas outside after the activation; The data processing module is further used to indicate the second detection result as a secondary early warning of abnormal gas generation when the external air pressure data is greater than the external air pressure threshold, the concentration of at least one type of external gas is greater than the concentration threshold of the corresponding type, and the second temperature data is less than or equal to the external temperature threshold.

[0028] In these embodiments, the cause of the abnormality and the degree of danger of the battery pack can be identified in a timely manner, and appropriate measures can be taken. In addition, by combining the internal and external gas and pressure collection units and the temperature collection unit, the accuracy of identifying thermal runaway and gas generation abnormalities in the battery pack can be improved, and erroneous diagnosis can be prevented.

[0029] Optionally, the second collection module: The battery core module may further include a smoke density collection unit that is activated when the first detection result indicates that there is a risk of thermal runaway in any of the battery cores, and that collects smoke density outside the battery core module after activation, and the second operating data may include smoke density; Here, if the smoke density is greater than the smoke density early warning value, the second detection result indicates that there is a secondary thermal runaway risk in the battery core.

[0030] In this embodiment, the installation of a smoke concentration collection unit provides an optional implementation method for the data processing module to implement secondary detection of thermal runaway risk based on secondary operating data. On the one hand, it can capture thermal runaway risk signals emanating from the battery core, and timely grasp the degree of thermal runaway risk emanating from the battery core. On the other hand, it can reflect changes in external signals due to changes in external conditions such as external high temperature and high pressure, and realize early warning of thermal runaway risk caused by external factors. Furthermore, it can detect the phenomenon of smoke generation in the battery pack and alert nearby people to take timely action.

[0031] In addition, this smoke density collection unit may be installed together with a second temperature collection unit, and the existence of a secondary thermal runaway risk in the battery core can be confirmed based on the data collected by either unit, thereby improving the accuracy of external thermal runaway risk detection. Furthermore, the smoke density collection unit is activated only when the first detection result indicates the existence of a thermal runaway risk in any battery core, so that the non-continuous operation state of the smoke density collection unit can be avoided, and the actual operating life of the smoke density collection unit can be greatly improved.

[0032] On the other hand, the present application provides a power consuming device that may include a battery pack of the above aspect.

[0033] In another aspect, the present application provides a detection method for a battery pack, which is applied to a data processing module, and the battery pack may include a battery core module, a first collection module, and a second collection module installed outside the battery core module, wherein the battery core module may include at least one battery core, and the first collection module may include at least one first collection unit, and the first collection unit is installed in the battery core, and the method includes: Obtaining first operating data of the battery core collected by a first collection module; performing thermal runaway detection on the battery core based on the first operating data to obtain a first detection result; When the first detection result indicates that there is a risk of thermal runaway in any of the battery cores, control to activate a second collection module, and acquire second operating data outside the battery cores collected by the second collection module; The method may further include performing a second detection of whether or not there is a risk of thermal runaway in the battery core based on the second operating data, and obtaining a second detection result.

[0034] In yet another aspect, the present application further provides a computer storage medium having a program or instructions stored therein, the program or instructions implementing the steps of the battery pack detection method of the above aspect when executed by a processor.

[0035] In yet another aspect, the present application further provides a computer storage medium, which, when executed by a processor, performs the steps of the battery pack detection method of the above aspect.

[0036] In yet another aspect, the present application further provides a computer program product, which can be executed by a processor to implement the steps of the battery pack detection method of the above aspect.

[0037] The above description is only a summary of the technical solution of the present application, which can be implemented according to the contents of the specification in order to more clearly understand the technical means of the present application, and in order to make the above and other objectives, features and advantages of the present application clearer and easier to understand, the following particularly cites specific embodiments of the present application to describe them. [Brief explanation of the drawings]

[0038] In order to more clearly explain the technical solutions of the embodiments of the present application, the following briefly introduces the drawings that need to be used in the embodiments of the present application. It is obvious that the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on the drawings without exerting any creative efforts. [Figure 1] 1 is a schematic diagram of a module structure of an embodiment of a battery pack according to the present application; [Figure 2] FIG. 2 is a schematic diagram of a module structure of another embodiment of the battery pack of the present application; [Figure 3] FIG. 10 is a schematic diagram of a module structure of yet another embodiment of a battery pack according to an embodiment of the present application. [Figure 4] FIG. 2 is a schematic diagram of one location of a temperature collection unit associated with a battery pack in an embodiment of the present application. [Figure 5] 10 is a schematic diagram of another location of the temperature collection unit associated with the battery pack of an embodiment of the present application. FIG. [Figure 6] FIG. 10 is a schematic diagram of a module structure of yet another embodiment of a battery pack according to an embodiment of the present application. [Figure 7] FIG. 10 is a schematic diagram of a module structure of yet another embodiment of a battery pack according to an embodiment of the present application. [Figure 8] FIG. 10 is a schematic diagram of a module structure of yet another embodiment of a battery pack according to an embodiment of the present application. [Figure 9] FIG. 10 is a schematic diagram of a module structure of yet another embodiment of a battery pack according to an embodiment of the present application. [Figure 10] 1 is an optional flowchart of a battery pack detection method according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0039] The following detailed description will be given of the embodiments of the technical solution of the present application in conjunction with the drawings. The following embodiments are merely for the purpose of more clearly illustrating the technical solution of the present application, and are for illustrative purposes only and should not be construed as limiting the scope of protection of the present application.

[0040] 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 of this application, and the terms used herein are only for describing specific embodiments and are not intended to limit this application. The terms "comprises" and "having" and any variations thereof in the specification and claims of this application and the description of the drawings above are intended to cover a non-exclusive "comprise."

[0041] In the description of the embodiments of the present application, the technical terms "first," "second," etc. are merely used to distinguish between different objects, and should not be understood as indicating or suggesting the relative importance or implicitly specifying the number, specific order, or hierarchical relationship of the indicated technical features. In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0042] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. Appearances of this phrase in various locations throughout the specification do not necessarily all refer to the same embodiment, nor are they mutually exclusive, independent, or alternative embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0043] In the description of the embodiments of this application, the term "and / or" is merely a relation that describes related objects and indicates that three relations may exist. For example, A and / or B may represent three cases: A alone, a combination of A and B, and B alone. In addition, the character " / " in this specification generally indicates that the related objects before and after are in an "or" relationship.

[0044] In describing the embodiments of the present application, the term "plurality" refers to two or more (including two); similarly, "sets" refers to two or more (including two sets); and "plurality" refers to two or more (including two).

[0045] In describing the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are orientations or positional relationships shown in the drawings, and are intended merely to facilitate and simplify the description of the embodiments of the present application. They do not indicate or imply that the devices or elements referred to have a specific orientation or must be configured and operated in a specific orientation, and therefore should not be understood as limitations on the embodiments of the present application.

[0046] In the new energy field, power batteries can be the main power source of power-consuming devices (e.g., vehicles, ships, or spacecraft), while energy storage batteries can be the charging source for power-consuming devices, and the importance of both goes without saying. For example and without limitation, in some application scenarios, the power battery can be the battery in the power-consuming device, and the energy storage battery can be the battery in the charging device. For convenience of description, hereinafter, both the power battery and the energy storage battery can be collectively referred to as batteries.

[0047] With the development of new energy technologies, the demand for power batteries and the energy density inside the power batteries will increase in parallel. In the long term, as the energy density of batteries continues to improve, the risk of thermal runaway will also show an increasing trend.

[0048] When performing early warning of battery thermal runaway, related technologies generally use temperature sensors installed in battery packs to measure early characteristic parameters of thermal runaway, and then combine the measured characteristic parameters with an evidence theory model to perform early warning of battery thermal runaway. However, this method has a relatively high thermal runaway detection error, and because the temperature sensor continues to measure the parameters, the service life of the temperature sensor is also shortened.

[0049] To solve the above technical problems, the present application provides a battery pack, a power consumption device, a battery pack detection method and a computer storage medium, and the following first introduces a battery pack according to an embodiment of the present application.

[0050] 1, which shows a schematic diagram of a module structure of one alternative embodiment of a battery pack 100 of the present application. In this embodiment, the battery pack 100 may include a battery core module 110, a first acquisition module 120, a data processing module 130, and a second acquisition module 140.

[0051] The battery core module 110 may include at least one battery core 111 .

[0052] The first collection module 120 may include at least one first collection unit 121, which may be installed within the battery core 111, and the first collection unit 121 may be used to collect first operating data of the battery core 111.

[0053] The data processing module 130 is connected to the first collecting unit 121, and the data processing module 130 is used to perform thermal runaway detection on the battery core 111 based on the first operating data and obtain a first detection result.

[0054] The second collection module 140 may be installed outside the battery core module 110. The second collection module 140 may be activated when the first detection result indicates that there is a thermal runaway risk in any of the battery cores 111, and may be used to collect second operating data of the battery cores 111 after activation.

[0055] The data processing module 130 may further be connected to a second collection module 140, and the data processing module 130 may further be used to perform a second detection of whether there is a thermal runaway risk in the battery core 111 based on the second operating data, and to obtain a second detection result.

[0056] The embodiment of the present application provides a battery core module 110, a first collection module 120, a second collection module 140, and a data processing module 130, where the first collection module 120 may include at least one first collection unit 121, and the data processing module 130 may be connected to the first collection unit 121 and is used to perform thermal runaway detection on the battery cores 111 included in the battery core module 110 based on the first operating data to obtain a first detection result. The second collection module 140 is connected to the data processing module 130 and is activated when the first detection result indicates that any of the battery cores 111 has a thermal runaway risk. After activation, the second collection module 140 can collect second operating data of the battery cores 111, and the data processing module 130 can further perform a second detection of whether the battery cores 111 have a thermal runaway risk based on the second operating data to obtain a second detection result. Because the first collection unit 121 is installed inside the battery core 111, it can directly collect operating data from within the battery core 111, more accurately reflecting the operating conditions inside the battery core 111. After determining that a thermal runaway risk exists based on the operating data inside the battery core 111, the second collection module 140 outside the battery core module 110 is activated, and a secondary detection is then performed based on the second operating data collected by the second collection module 140. This combines internal and external detection through two-stage detection to improve the accuracy of thermal runaway early warning detection. Furthermore, the second collection module 140 is only activated and in an intermittent collection state when the first detection result indicates that a thermal runaway risk exists, thereby improving the service life of the second collection module 140.

[0057] The battery pack 100 may include at least one battery core 111 and at least one first collecting unit 121, and the first collecting unit 121 may correspond to the battery core 111, and the first collecting unit 121 may be installed in the corresponding battery core 111. Here, the battery core 111 may be a hard case battery core, a pouch battery core, a laminated type or a cylindrical battery core.

[0058] Each first collecting unit 121 may include one or more collecting elements, all of which are provided within the battery core 111. The collecting elements may be sensors or other collecting elements for acquiring first operating data. Illustratively, the first collecting units 121 may include at least a temperature collecting unit, and in other examples, may further include a pressure collecting unit, a gas collecting unit, and an air pressure collecting unit, etc. These collecting elements have relatively strong corrosion resistance, making them suitable for stable installation within the battery core 111.

[0059] The data processing module 130 may be a BMS (Battery Management System) or a chip dedicated to thermal runaway risk early warning. The data processing module 130 and the first collecting unit 121 may be electrically connected via conductors. For example, after the first collecting unit 121 realizes signal collection, the first collecting unit 121 extracts the collected signals through independent conductors, and then the current first operating data collected by the first collecting unit 121 inside the battery core 111 can be obtained by signal decoupling.

[0060] The first operating data is related to the type of the first collecting unit 121. For example, if the first collecting unit 121 includes a first temperature collecting unit 310, the first operating data may include first temperature data collected by the first temperature collecting unit 310. If the first collecting unit 121 includes a gas collecting unit, the first operating data may include gas concentrations collected by the gas collecting unit.

[0061] When performing a thermal runaway early warning, the data processing module 130 can determine whether any battery cores 111 in the battery pack 100 meet the thermal runaway detection condition based on the first operating data in combination with the operating conditions of different first operating data. If any battery cores 111 meet the thermal runaway detection condition, the first detection result can indicate that there is a thermal runaway risk in the battery pack 100 and / or the battery cores 111 in the battery pack 100 that meet the thermal runaway detection condition. At this time, the data processing module 130 can issue a thermal runaway first early warning and personnel can evacuate in a timely manner. Conversely, if none of the battery cores 111 meet the thermal runaway detection condition, the first detection result indicates that neither the battery pack 100 nor any of the battery cores 111 meet the thermal runaway detection condition. At this time, the data processing module 130 can trigger the first collection module 120 to continue signal collection.

[0062] Here, the battery pack 100 may further include a second collection module 140, which may be installed outside the battery core module 110, i.e., the second collection module 140 can collect operating data (i.e., second operating data) outside the battery core module 110 in the battery pack 100. The second collection module 140 can be activated when the first detection result indicates that there is a thermal runaway risk in the battery core 111 or the battery pack 100, and can collect the second operating data outside the battery core 111 after activation.

[0063] The second operating data is mainly environmental data within the battery pack 100 of the battery core 111. The second operating data may be at least partially the same type as the first operating data. For example, the second operating data and the first operating data may both include temperature data. In addition, the second operating data may further include smoke density, gas pressure, and gas concentration within the battery pack 100.

[0064] After the second collection module 140 collects the second operating data of the battery core 111 in the battery pack 100, it can transmit this second operating data to the data processing module 130 electrically connected thereto, and the data processing module 130 can perform a second detection of whether there is a thermal runaway risk in the battery core 111 / battery pack 100 based on the second operating data, and obtain a second detection result.

[0065] Here, if the data processing module 130 undergoes secondary detection and determines based on the second detection result that there is a risk of thermal runaway in the battery core 111 / battery pack 100, it can trigger a secondary thermal runaway early warning at this time.

[0066] It should be noted that the primary signal collection mechanism inside the battery core 111 and the corresponding thermal runaway early warning scheme can timely reflect problems inside the battery core 111, first respond to the thermal runaway risk of the battery core 111, and perform secondary verification by the second collection module 140, which can on the one hand capture the thermal runaway risk signals overflowing from inside the battery core 111, and on the other hand reflect changes in external signals due to changes in external conditions such as external mechanical pressure, high temperature, etc., thereby realizing early warning of the thermal runaway risk caused by external factors.

[0067] In these embodiments, the primary signal collection mechanism established by the first collection module 120 installed inside the battery core 111, combined with the secondary verification by the second collection module 140, can mutually complement and verify the first and second operating data collected inside and outside the battery core 111, thereby improving the accuracy of detection and status determination inside and outside the battery core 111 and the battery pack 100, and eliminating erroneous determinations caused by a single signal collection module making early warning judgments. In addition, the second collection module 140 is only activated when the first detection result indicates that there is a risk of thermal runaway in the battery core 111 / battery pack 100, which can avoid invalid operation due to such discontinuous operating states and significantly improve the actual operating life of the second collection module 140.

[0068] In some embodiments, when the second operating data is used to perform secondary detection of the risk of thermal runaway, if the detection result is normal, the secondary detection can be continued until the primary thermal runaway early warning is deactivated. It should be noted that when the primary early warning is activated, it indicates that a risk of thermal runaway exists within the battery core 111, but the risk may not have spilled out of the battery core 111. In this case, the risk of thermal runaway can be eliminated by temperature reduction measures such as thermal management until the first operating data of each item within the battery core 111 returns to normal, at which point the primary early warning can be deactivated and the secondary detection can be stopped. This allows for continuous detection of whether the risk of thermal runaway exists within the battery core 111, ensuring the safety of the environment in which the battery pack 100 is located.

[0069] 2 , based on the above embodiment, another embodiment of the present application is provided, in which the battery pack 100 may further include a thermal management module 210, which may be connected to the data processing module 130. The thermal management module 210 may balance the temperature of the battery cores 111 when the first detection result indicates that there is a thermal runaway risk in any of the battery cores 111.

[0070] When the first detection result indicates that there is a risk of thermal runaway in any of the battery cores 111, the thermal management module 210 can be adjusted to further achieve temperature management and reduce the temperature inside the battery cores 111. At the same time, the first collection module 120 inside the battery cores 111 can continue to collect the first operating data, so as to determine whether the primary early warning can be cancelled according to the temperature reduction plan of the thermal management module 210.

[0071] The measures by which the thermal management module 210 balances the temperature of the battery core 111 can be designed according to actual needs in conjunction with the relevant art prior to the filing date of this application, and will not be further described here. The embodiments of this application mainly emphasize the timing by which the thermal management module 210 balances the temperature of the battery core 111.

[0072] In these embodiments, by balancing the battery core 111 temperature after the thermal management module 210 generates a first early warning (i.e., the first detection result indicates that there is a risk of thermal runaway in one of the battery cores 111), the operation to reduce the battery core 111 temperature can be performed earlier than in the related art, which helps to reduce the risk of thermal runaway in the battery core 111 and improve the safety of using the battery core 111.

[0073] Referring to FIG. 3, based on the above embodiment, another embodiment of the present application is provided, in which the first collecting unit 121 may include a first temperature collecting unit 310.

[0074] The first temperature collecting unit 310 is used to collect first temperature data of the battery core 111, and the first operating data may include the first temperature data.

[0075] The data processing module 130 can obtain the first temperature data collected by the first temperature collecting unit 310 through the electrically connected conductor. Then, the data processing module 130 can perform thermal runaway detection on the battery core 111 according to the first temperature data. If the first temperature data meets the thermal runaway condition, the data processing module 130 can indicate that the first detection result indicates that there is a thermal runaway risk in the battery core 111, and at this time, activate a thermal runaway primary early warning.

[0076] The first temperature collecting unit 310 may be a temperature sensor or other temperature collecting device used for temperature collection. The type of the temperature sensor may be one or more of an optical fiber sensor, a bimetal thermometer, a glass-liquid thermometer, a pressure thermometer, a resistance thermometer, a thermistor, a differential thermocouple, etc. The first temperature collecting unit 310 may be attached to the electrode plate in an array, and the attachment position may be set according to actual needs.

[0077] It should be noted that the battery core 111 described above may include a bare cell, which is further accommodated in an accommodating space defined by the top cover and the case. The bare cell may be formed by winding a separator and an electrode plate. For example, referring to FIGS. 3 to 5 together, FIGS. 4 and 5 show schematic diagrams of selective distribution positions of the first temperature collection unit 310 when the electrode plate in the battery core 111 has a wound structure (i.e., positions indicated by circled numbers 1 to 4 in the figures). The electrode plate may be a positive electrode plate, which may be wound around a winding axis to form a wound structure. The electrode plate may include a plurality of flat portions 410 and a plurality of folded portions 420. The plurality of flat portions 410 may be stacked and arranged along a first direction X. The folded portions 420 are at least partially bent in an arc and connected to two adjacent flat portions 410, and the first direction X is perpendicular to the winding axis. The first temperature collecting unit 310 may be attached to the flat portion 410 and / or the folded portion 420 .

[0078] The first temperature collecting unit 310 may be attached to the folded portion 420 of the outermost / innermost electrode plate inside the battery core 111, or may be attached to the flat portion 410 of the outermost / innermost electrode plate inside the battery core 111. Of course, the first temperature collecting unit 310 may also be attached to an intermediate electrode plate.

[0079] The first temperature data meeting the temperature runaway condition may be the first temperature data exceeding the temperature threshold, i.e., if the first temperature data exceeds the temperature threshold, the first detection result indicates that there is a thermal runaway risk in the battery core 111; conversely, if the first temperature data does not exceed the temperature threshold, the first detection result indicates that there is temporarily no thermal runaway risk in the battery core 111.

[0080] It should be further mentioned that when the first temperature collecting unit 310 is installed at multiple positions, the temperature thresholds of the corresponding positions may be different, thereby taking into account the temperature differences of each position inside the battery core 111.

[0081] These embodiments provide a selective thermal runaway early warning method for the first temperature collection unit 310 built into the battery core 111, which helps to provide a thermal runaway detection method with high accuracy and sensitivity, helps to realize early thermal runaway management of the battery, improves the accuracy of thermal runaway early warning, and buys more time for subsequent thermal management and thermal runaway early warning notification, thereby improving the technical problem of serious delays in thermal runaway early warning in related technologies.

[0082] Referring to FIG. 6 , based on the above embodiment, yet another embodiment of the present application is provided, in which the first collecting unit 121, in addition to including the first temperature collecting unit 310, may further include a primary collecting unit 610.

[0083] The primary collection unit 610 is used to collect third operating data other than the first temperature data of the battery core 111, and the first operating data may further include the third operating data.

[0084] After the primary collection unit 610 collects and obtains the third operating data of the battery core 111, the data processing module 130 can obtain the third operating data collected by the primary collection unit 610 through the conductor, and if the third operating data meets the corresponding type of data detection condition, perform thermal runaway detection on the battery core 111 based on the first temperature data.

[0085] The main difference between this embodiment and the previous embodiment is the addition of a primary collection unit 610 and data detection conditions corresponding to different data types, and this added primary collection unit 610 may be installed based on the triggers or principles of different thermal runaway phenomena occurring inside the battery core 111.

[0086] For example, if the risk of thermal runaway may be due to excessively high gas concentration generated inside the battery core 111, the primary collection unit 610 can detect gas and air pressure concentrations, and further obtain third operating data, and the data processing module 130 can determine whether the third operating data meets the data detection conditions of the gas and air pressure concentration type.

[0087] This data detection condition is that the third operating data reaches the detection condition for an abnormal phenomenon related to thermal runaway, and when the third operating data meets the corresponding type of data detection condition, thermal runaway detection of the battery core 111 can be realized by the first temperature data collected by the first temperature collection unit 310.

[0088] In these embodiments, before detecting thermal runaway of the battery core 111 based on the first temperature data, a data detection condition judgment of the third operating data is added to eliminate possible abnormalities that may occur in the first temperature collection unit 310, improve the accuracy of detecting thermal runaway of the battery core 111, and at the same time provide a reference basis for finding the root cause of the thermal runaway of the battery core 111.

[0089] Referring to FIG. 7 and also referring to FIGS. 4 and 5, based on the above embodiment, yet another embodiment of the battery pack 100 of the present application is provided, in which the primary collection unit 610 may include a pressure collection unit 710.

[0090] The pressure collecting unit 710 may correspond to the first temperature collecting unit 310, and may be attached to the flat portion 410 and / or the folded portion 420 shown in FIGS. 4 and 5, or may be attached to the inner surface of the case. The pressure collecting unit 710 may collect pressure data of the battery core 111, and the third operating data includes the pressure data. Here, if the pressure data is greater than the pressure threshold, the third operating data meets the data detection condition of the corresponding pressure type.

[0091] The pressure collection unit 710 may be a pressure sensor or other collection device for obtaining pressure data, where the pressure sensor type may include at least one of strain gauge, piezoresistive, electromagnetic, capacitor, piezoelectric, capacitive, and vibrating string.

[0092] The thickness of the pressure collection unit 710 is generally less than 10 μm, and these pressure collection units 710 may be sealed and fixed to the electrode plate by a sealing adhesive. In some embodiments, when the pressure collection unit 710 is attached to the flat portion 410, its effective area may be within 1 cm*1 cm, and when the pressure collection unit 710 is attached to the folded portion 420, its effective area may be within 0.5 cm*0.5 cm.

[0093] In some examples, this pressure collection unit 710 may be installed next to the first temperature collection unit 310. Before shipping the battery core 111, the first temperature collection unit 310 and the pressure collection unit 710 may be packaged together with a battery adhesive to form a temperature and pressure collection array, which may be thin-film type and have good flexibility, making it suitable for installation at different positions inside the battery core 111.

[0094] 7, and also referring to FIG. 4, the pressure collecting unit 710 may be installed on the flat portion 410 and / or the folded portion 420 of the innermost / outermost electrode plate of the battery core 111, and may also be installed at several positions on the inner surface of the case of the battery core 111. In another example, the pressure collecting unit 710 may be installed on the middle electrode plate.

[0095] It is described that pressure collection units 710 are installed on the flat portion 410 of the innermost electrode plate of the battery core 111, the folded portion 420 of the outermost electrode plate of the battery core 111, and the inner surface of the case of the battery core 111. Here, the pressure data measured on the flat portion 410 of the innermost electrode plate of the battery core 111 is the first pressure data P1, the pressure data measured on the folded portion 420 of the outermost electrode plate of the battery core 111 is the second pressure data P2, and the pressure data measured on the inner surface of the case of the battery core 111 is the third pressure data P3.

[0096] If any of the pressure data from the first pressure data P1 to the third pressure data P3 is greater than the corresponding pressure threshold, the third operating data is considered to meet the data detection condition for the corresponding pressure data type, and it can be determined whether the first temperature data meets the temperature runaway condition.

[0097] If all of the pressure data from the first pressure data P1 to the third pressure data P3 are equal to or less than the corresponding pressure threshold value, the pressure collecting unit 710 can continue detection.

[0098] In these embodiments, taking into account the situation where the internal pressure of the battery core 111 is too high, causing the internal temperature of the battery core 111 to rise and further increasing the risk of thermal runaway, the combination of the built-in pressure collection unit 710 and the first temperature collection unit 310 can realize a first early warning of local thermal runaway, and in assessing the risk of thermal runaway, can find the root cause of thermal runaway inside the battery core 111 and provide reference for subsequent analysis and detection of thermal runaway.

[0099] Continuing to refer to FIG. 7, based on the above embodiment, another embodiment of the battery pack 100 of the present application is provided, in which the data processing module 130 is further used to indicate the first detection result as a force receiving abnormality of the battery core 111 when the pressure data is greater than the pressure threshold and the first temperature data does not meet the temperature runaway condition.

[0100] It should be noted that if the pressure data at a certain position inside the battery core 111 is greater than the pressure threshold value at the corresponding position, it indicates that a local force receiving abnormality has occurred inside the battery core 111. However, this force receiving abnormality phenomenon will not cause a temperature rise inside the battery core 111, and therefore there is no risk of thermal runaway. The data processing module 130 may recognize the first detection result as a local force receiving abnormality of the battery core 111, and may issue a first warning of the local force receiving abnormality.

[0101] In these embodiments, the data processing module 130 analyzes the situation where the pressure in the battery core 111 is too high, and determines whether it is thermal runaway caused by a local force receiving abnormality or a local force receiving abnormality, thereby achieving accurate abnormality analysis of the internal pressure of the battery core 111 being too high.

[0102] Referring to FIG. 8, based on the above embodiment, yet another embodiment of the battery pack 100 of the present application is provided, in which the primary collection unit 610 may include a built-in air pressure and gas collection unit 810.

[0103] The built-in air pressure and gas collecting unit 810 may be installed between the top cover and the bare cell, and may collect air pressure data and at least one type of gas concentration within the case, where if the air pressure data is greater than the air pressure threshold and the concentration of any type of gas is greater than the corresponding type's concentration threshold, it is determined that the third operating data meets the corresponding type's data detection condition.

[0104] It should be noted that when the temperature inside the battery core 111 rises, the electrolyte and the active material will rapidly undergo side reactions, producing large amounts of explosive gases (e.g., hydrogen gas, carbon monoxide), volatile organic compounds (VOCs), and carbon dioxide. At this time, the gas pressure will also rise quickly, which is likely to cause thermal runaway. By installing a built-in air pressure and gas collection unit 810 inside the battery core 111, it is possible to better detect whether a large amount of gas has been generated inside the battery core 111, and by combining this with changes in the first temperature data, it is possible to accurately determine whether thermal runaway of the battery core 111 is caused by abnormal gas generation.

[0105] The built-in air pressure and gas collection unit 810 can be divided into a gas collection unit and an air pressure collection unit. Here, the gas collection unit may include semiconductor gas sensors sensitive to various gases, or the gas collection unit may be a gas sensor array manufactured by integrating semiconductor gas sensors. The air pressure collection unit may be an air pressure sensor or other type, and the type of air pressure sensor may include one or more of strain gauge, piezoresistive type, electromagnetic type, capacitor type, piezoelectric type, capacitive type, and vibrating string type.

[0106] The gas sensor may include multiple types, and after being integrated into a gas sensor array, it can detect different component contents of multiple types, while saving space. The gas sensor may be used to detect gases that cause the gas generation of the battery core 111 to expire, such as hydrogen gas, carbon monoxide, and carbon dioxide, and may also be used to detect organic compounds that are affected by temperature and have relatively high volatility. For example, the volatile organic compounds may include methane, ethylene, etc.

[0107] For example, the gas collecting unit can detect the gas concentrations of hydrogen gas, carbon monoxide, carbon dioxide and VOCs inside the battery core 111, and at the same time, the air pressure collecting unit can collect the gas pressure inside the battery core 111. If the total gas pressure inside the battery core 111 is not greater than the air pressure threshold or the concentrations of all types of gases are equal to or less than the corresponding gas concentration thresholds, then gas generation inside the battery core 111 is normal, and the detection of gas pressure and gas concentration can continue.

[0108] If the total gas pressure inside the battery core 111 is greater than the atmospheric pressure threshold and the concentration of any type of gas is greater than the corresponding type of gas concentration threshold, it is determined that there is abnormal gas generation inside the battery core 111. Furthermore, it can check whether the first temperature data is greater than the temperature threshold, and if the first temperature data is greater than the temperature threshold, it is determined that there is a risk of thermal runaway inside the battery core 111 due to abnormal gas generation; otherwise, it is determined that there is abnormal gas generation inside the battery core 111, and a primary alarm for abnormal gas generation inside the battery core 111 can be issued.

[0109] It should be further explained that the gas concentration thresholds for each type can be set based on the actual effect of the gas concentration on thermal runaway, and the gas concentration thresholds for each type may be the same or different.

[0110] In some other embodiments, the pressure P of each gas is determined by the gas concentration and the total gas pressure. i =P * y i where P is the gas pressure inside the battery core 111, y is the concentration of i-type gas, and is combined with the pressure threshold corresponding to each gas to determine whether the gas generation inside the battery core 111 is abnormal.

[0111] Continuing to refer to FIG. 8, based on the above embodiment, yet another embodiment of the battery pack 100 of the present application is provided, in which the data processing module 130 is further used to indicate the first detection result as a gas generation abnormality in the battery core 111 when the air pressure data is greater than the air pressure threshold, the first temperature data does not meet the temperature runaway condition, and the concentration of any type of gas is greater than the concentration threshold of the corresponding type.

[0112] If the first temperature data does not meet the temperature runaway condition, it indicates that the inside of the battery core 111 has not yet reached the condition for early warning of the risk of thermal runaway due to abnormal gas generation, but abnormal gas generation has occurred. Therefore, thermal runaway due to gas generation or abnormal gas generation can be confirmed, and an accurate abnormal gas generation analysis can be performed inside the battery core 111, thereby discovering the cause of the thermal runaway and providing a favorable reference basis for subsequent detection and analysis of thermal runaway in the battery core 111.

[0113] It should be noted that the related art includes a flammable gas detection method for detecting gas that has overflowed into the battery pack 100. This gas actually accumulates in the battery core 111 until it reaches a certain level, and then bursts through the explosion-proof valve when the air pressure reaches a critical level. Therefore, the related art has a delay in detection and early warning, which risks reducing the evacuation time. Furthermore, the flammable gas detection method mainly detects VOC gases. Compared to the related art, these embodiments include a built-in air pressure and gas collection unit 810 installed inside the battery core 111, which can detect the concentrations of various types of gases, such as carbon monoxide, carbon dioxide, and methane. This improves the reliability of the thermal runaway early warning method, improves the range of thermal runaway risk early warning, and reduces errors.

[0114] Referring to FIG. 9, based on the above embodiment, yet another embodiment of the battery pack 100 of the present application is provided, in which the battery pack 100 may further include a third collection module 910.

[0115] This third collection module 910 may be connected to the data processing module 130, and the third collection module 910 may be used to collect electrical data of the battery core 111, where the electrical data includes at least one of the voltage value, current value of the circuit in which the battery core 111 is located and the insulation resistance value of the battery core 111.

[0116] The above electrical data is also included in the third operating data, and it can be determined whether the electrical type data detection condition is met based on at least one of the electrical data. The electrical type data detection condition may include that the insulation resistance value is smaller than a resistance threshold, that the current value of the circuit in which the battery core 111 is located is greater than a current threshold, or that the voltage value decrease rate of the circuit in which the battery core 111 is located is greater than a speed threshold. That is, if at least one of the insulation resistance value, the voltage value decrease rate, and the current value meets the condition, the third operating data meets the electrical type data detection condition.

[0117] It should be noted that if the above electrical type data detection conditions are met, it indicates that the circuit in which the battery core 111 is located may have a short circuit or serious self-discharge, which is likely to cause a thermal runaway risk. Whether the first temperature data meets the thermal runaway condition needs to be further correlated to determine whether the battery core 111 has a short circuit abnormality or there is a thermal runaway risk due to a short circuit.

[0118] These embodiments consider the risk of thermal runaway caused by electrical factors in the battery core 111, explore the root cause of thermal runaway occurrence within the battery core 111, and provide reference for subsequent thermal runaway analysis and detection.

[0119] Continuing to refer to FIG. 9, based on the above embodiment, yet another embodiment of the battery pack 100 of the present application is provided, in which the data processing module 130 may further be used to indicate the first detection result as a short circuit abnormality of the battery core 111 if it determines based on the electrical data that the third operating data meets the corresponding type of data detection condition and the first temperature data does not meet the temperature runaway condition.

[0120] In this embodiment, after the electrical data is judged, it is determined whether the first temperature data meets the temperature runaway condition, and it can be determined whether there is a risk of thermal runaway in the battery core 111 due to a short circuit abnormality in the battery core 111, thereby realizing accurate abnormality analysis of the short circuit in the battery core 111.

[0121] In these embodiments, a primary signal collection system is formed by combining electrical data, gas generation, and internal pressure of the battery core 111, which triggers a determination of whether the first temperature data meets the thermal runaway conditions, thereby realizing early warning of the risk of thermal runaway from each root cause of the thermal runaway occurrence, and at the same time, discovering the triggers of the thermal runaway occurrence from all angles.

[0122] Based on the above embodiment, yet another embodiment of the battery pack 100 of the present application is provided, in which the second collection module 140 may include a second temperature collection unit 141. This second temperature collection unit 141 may be activated when the first detection result indicates that there is a thermal runaway risk in any of the battery cores 111, and may be used to collect second temperature data of the battery cores 111 after activation, where the second operating data may include the second temperature data.

[0123] The data processing module 130 may further be used to indicate the second detection result that there is a secondary thermal runaway risk in the battery core 111 when the second temperature data is greater than the external temperature threshold.

[0124] Thus, when the data processing module 130 determines based on the first operating data that there is a risk of thermal runaway in the battery core 111, it can trigger the second temperature collection unit 141 to start up and obtain second temperature data from the second temperature collection unit 141. When the second temperature data is greater than the external temperature threshold, it indicates that there is also a temperature abnormality outside the battery core module 110 in the battery pack 100, and at this time there is a secondary thermal runaway risk in the battery core 111.

[0125] The second temperature collecting unit 141 may be distributed around the battery core module 110 or around other components of the battery pack 100 other than the battery core module 110. The second temperature collecting unit 141 can detect the module temperature and the temperature inside the battery pack 100, respectively. If any of the temperatures exceeds the temperature early warning value, it indicates that there is a secondary thermal runaway risk in the battery core 111, and the data processing module 130 can issue a thermal runaway secondary early warning signal, thereby improving the thermal runaway risk level. Conversely, if none of the temperatures collected by the second temperature collecting unit 141 exceeds the temperature early warning value, it indicates that there is still a thermal runaway risk in the battery core 111, but that there is no risk of overflow.

[0126] This method can, on the one hand, capture the thermal runaway risk signal overflowing from inside the battery core 111 and timely grasp the degree of thermal runaway risk overflowing from inside the battery core 111, and, on the other hand, reflect changes in external signals due to changes in external conditions such as external high temperatures, thereby realizing early warning of thermal runaway risks caused by external factors.

[0127] In this embodiment, the installation of the second temperature collecting unit 141 provides an optional implementation manner for the data processing module 130 to implement secondary detection of thermal runaway risk based on the second operating data. The second temperature collecting unit 141 is activated only when the first detection result indicates that there is a thermal runaway risk in any of the battery cores 111. Therefore, the non-continuous operation state of the second temperature collecting unit 141 can avoid invalid operation, and the actual operating life of the second temperature collecting unit 141 is greatly improved.

[0128] Referring to FIG. 9, based on the above embodiment, another embodiment of the battery pack 100 of the present application is provided, in which the second collection module 140, in addition to including a second temperature collection unit 141, may further include an external air pressure and gas collection unit 142.

[0129] The external air pressure and gas collection unit 142 is activated when the first detection result indicates that there is a risk of thermal runaway in any battery core 111, and after activation, it can collect external air pressure data of the battery core module 110 and the concentration of at least one type of external gas.

[0130] The data processing module 130 may further be used to indicate the second detection result as a secondary early warning of abnormal gas generation when the external air pressure data is greater than the external air pressure threshold, the concentration of at least one type of external gas is greater than the concentration threshold of the corresponding type, and the second temperature data is less than or equal to the external temperature threshold.

[0131] Here, the specific type and abnormality judgment logic of the external air pressure and gas collecting unit 142 can be set with reference to the built-in air pressure and gas collecting unit 810 in the battery core 111, and will not be further described here.

[0132] When an external gas generation abnormality is detected by the external pressure and gas collection unit 142, the data processing module 130 can obtain the second temperature data collected by the second temperature collection unit 141, and if the second temperature data is greater than the corresponding temperature threshold, a secondary gas generation thermal runaway alarm can be issued to improve the risk level of thermal runaway, or conversely, a secondary gas generation abnormality alarm can be issued to improve the risk level of gas generation abnormality.

[0133] It should be noted that if the external pressure and gas collecting unit 142 detects an external gas generation abnormality, it means that the gas generation abnormality has already caused the gas to break the explosion-proof valve of the battery core module 110 and leak out of the battery core 111, creating a relatively dangerous situation. By displaying the risk levels for different situations, the cause of the abnormality and the degree of danger of the battery pack 100 can be identified in a timely manner, and appropriate measures can be taken. In addition, the combined installation of the internal and external gas and pressure collecting units and the temperature collecting unit can improve the accuracy of identifying thermal runaway and gas generation abnormalities in the battery pack 100 and prevent erroneous diagnosis.

[0134] Continuing to refer to FIG. 9, based on the above embodiment, yet another embodiment of the battery pack 100 of the present application is provided, in which the second collection module 140 may include a smoke density collection unit 143.

[0135] The smoke density collection unit 143 is activated when the first detection result indicates that there is a thermal runaway risk in any of the battery cores 111, and is used to collect the smoke density outside the battery core module 110 after activation, and the second operating data includes the smoke density. Here, if the smoke density is greater than the smoke density early warning value, the second detection result indicates that there is a secondary thermal runaway risk in the battery core 111.

[0136] The smoke density collection unit 143 may be distributed around the battery core module 110 and at other locations in the battery pack 100 besides the battery core module 110, and can detect the smoke density in the module and the battery pack 100, and compare each smoke density with the corresponding smoke density early warning value. If any smoke density exceeds the corresponding smoke density early warning value, it indicates a secondary thermal runaway risk in the battery core 111, and the data processing module 130 can issue a secondary thermal runaway smoke early warning signal for the battery core 111, thereby improving the thermal runaway risk level and notifying nearby people of risks such as smoke inhalation. Conversely, if none of the smoke densities collected by the smoke density collection unit 143 exceed the smoke density early warning value, it indicates that the battery core 111 still has a thermal runaway risk, but no temporary overflow risk has occurred.

[0137] This solution can, on the one hand, capture the thermal runaway risk signal emanating from inside the battery core 111 and timely grasp the degree of thermal runaway risk emanating from inside the battery core 111, and, on the other hand, reflect changes in external signals due to changes in external conditions such as external high temperature and high pressure, thereby realizing early warning of thermal runaway risk caused by external factors. Furthermore, it can also detect the phenomenon of smoke being emitted from the battery pack 100 and alert people nearby to take timely action.

[0138] In this embodiment, the installation of the smoke density collection unit 143 provides an optional implementation manner for the data processing module 130 to implement secondary detection of thermal runaway risk based on second operating data. This smoke density collection unit 143 may be installed together with the second temperature collection unit 141, and the existence of a secondary thermal runaway risk in the battery cores 111 can be determined based on data collected by either unit, thereby improving the accuracy of external thermal runaway risk detection. Furthermore, since the smoke density collection unit 143 is only activated when the first detection result indicates the existence of a thermal runaway risk in any of the battery cores 111, the discontinuous operation state of the smoke density collection unit 143 can be avoided, and the actual operating life of the smoke density collection unit 143 can be greatly improved.

[0139] 1 to 9, the battery pack of the embodiment of the present application is described in detail. Based on this, the embodiment of the present application further protects a power consumption device, which includes the battery pack according to the above embodiment, so that the power consumption device has all the beneficial effects of the battery pack.

[0140] Referring to FIG. 10, based on the battery pack of the above embodiment, the embodiment of the present application further provides a detection method for a battery pack, which is applied to a data processing module, and the battery pack may include a battery core module, a first collecting module and a second collecting module installed outside the battery core module, the battery core module may include at least one battery core, the first collecting module may include at least one first collecting unit, and the first collecting unit is installed in the battery core, and the method includes: In S101, a first collection module acquires first operating data of a battery core; In S102, a thermal runaway detection is performed on the battery core based on the first operating data to obtain a first detection result; In S103, when the first detection indicates that there is a risk of thermal runaway in any battery core, control to start a second collection module, and obtain second operating data outside the battery core collected by the second collection module; In S104, a second detection is performed based on the second operating data to determine whether or not there is a risk of thermal runaway in the battery core, and a second detection result is obtained.

[0141] In the embodiment of the present application, the first collection unit is installed in the battery core, thereby directly collecting operating data within the battery core and more accurately reflecting the operating conditions within the battery core. After determining that there is a risk of thermal runaway based on the operating data within the battery core, the second collection module outside the battery core module is activated, and then a secondary detection is performed based on the second operating data collected by the second collection module. This combines internal and external two-stage detection to improve the accuracy of thermal runaway early warning detection. Furthermore, when the first detection result indicates there is a risk of thermal runaway, the second collection module is activated and enters an intermittent collection state, thereby improving the service life of the second collection module.

[0142] Still referring to FIG. 10, based on the above embodiment, another embodiment of the battery pack detection method of the present application is provided, in this embodiment, after S102, the method includes: In S105, if the first detection result indicates that there is a risk of thermal runaway in any of the battery cores, the method further includes controlling the thermal management module to balance the temperatures of the battery cores.

[0143] In these embodiments, by balancing the battery core temperature after the thermal management module generates a first early warning (i.e., the first detection result indicates that there is a risk of thermal runaway in one of the battery cores), the operation to reduce the battery core temperature can be performed earlier than in related art, which helps to reduce the risk of thermal runaway in the battery core and improve the safety of use of the battery core.

[0144] Based on the above embodiment, another embodiment of the detection method for a battery pack of the present application is provided, in which the first collecting unit includes a first temperature collecting unit and a primary collecting unit.

[0145] Here, performing thermal runaway detection on the battery core based on the first operating data and obtaining a first detection result may include acquiring third operating data collected by the primary collection unit and first temperature data collected by the first temperature collection unit, wherein the first operating data includes the third operating data and the first temperature data, and when the third operating data meets a corresponding type of data detection condition, performing thermal runaway detection on the battery core using the first temperature data.

[0146] The third operating data can be set with reference to the above, and in these embodiments, the third operating data similar to electrical data, gas generation, and battery core internal pressure can be combined to form a primary signal collection system, which triggers a judgment of whether the first temperature data meets the thermal runaway conditions, and realizes early warning of the thermal runaway risk from each root cause of the thermal runaway occurrence, while at the same time discovering the triggers of the thermal runaway occurrence in a comprehensive manner.

[0147] In addition, in combination with the battery pack detection method in the above embodiments, the embodiments of the present application can be realized by providing a computer storage medium having computer program instructions stored therein, which, when executed by a processor, realizes any of the battery pack detection methods in the above embodiments.

[0148] Moreover, the embodiments of the present application further provide a computer program product, which includes a computer program, which can implement the steps and corresponding contents of the method embodiments when executed by a processor.

[0149] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and equivalents may be substituted for the components therein without departing from the scope of the present application. In particular, unless there is a structural conflict, the technical features recited in each embodiment may be combined in any manner. The present application is not limited to the specific embodiments disclosed in the specification, but includes all technical solutions falling within the scope of the claims. [Explanation of symbols]

[0150] 100: Battery pack, 110: battery core module, 120: first collection module, 130: data processing module, 140: second collection module, 111: battery core; 121: first collecting unit; 141: second temperature collecting unit; 142: external air pressure and gas collecting unit; 143: smoke density collecting unit; 210: Thermal management module; 310: temperature collection unit; 410: Flat portion, 420: Bent portion, X: First direction, 610: Primary collection unit, 710: Pressure collection unit; 810: Built-in air pressure and gas collection unit; 910: Third collection module.

Claims

1. A battery pack, a battery core module including at least one battery core; a first collection module including at least one first collection unit, the first collection unit being installed in the battery core, the first collection unit being used to collect first operating data of the battery core; a data processing module connected to the first collection unit and used to perform thermal runaway detection on the battery core based on the first operating data to obtain a first detection result; a second collection module, which is installed outside the battery core module, is activated when the first detection result indicates that there is a risk of thermal runaway in any of the battery cores, and is used to collect second operating data of the battery cores after being activated; The data processing module is further connected to the second collection module, and is further used to perform a second detection of whether there is a thermal runaway risk in the battery core based on the second operating data, and obtain a second detection result; the first collection unit includes a first temperature collection unit; the first temperature collecting unit is used to collect first temperature data of the battery core, and the first operating data includes the first temperature data; the data processing module is used to perform thermal runaway detection on the battery core according to the first temperature data, and when the first temperature data meets a thermal runaway condition, to indicate the first detection result as indicating that there is a thermal runaway risk in the battery core; the first collection unit further comprises a primary collection unit; the primary collection unit is used to collect third operating data other than the first temperature data of the battery core, and the first operating data includes the third operating data; the data processing module is used to perform thermal runaway detection on the battery core according to the first temperature data when the third operating data meets a corresponding type of data detection condition; Battery pack.

2. The battery pack 2. The battery pack of claim 1, further comprising a thermal management module connected to the data processing module for balancing temperatures of the battery cores when the first detection result indicates that a thermal runaway risk exists in any of the battery cores.

3. The battery core includes a case and a plate housed in the case, and the primary collection unit includes: a pressure collecting unit corresponding to the first temperature collecting unit, the pressure collecting unit being attached to the inner surface of the case and / or the electrode plate, the pressure collecting unit being used to collect pressure data of the battery core, and the third operating data including the pressure data; The battery pack according to claim 1 , wherein, if the pressure data is greater than a pressure threshold, the third operating data meets a corresponding type of data detection condition.

4. 4. The battery pack according to claim 3, wherein the data processing module is further used to indicate the first detection result as a battery core force receiving abnormality when the pressure data is greater than a pressure threshold and the first temperature data does not comply with a temperature runaway condition.

5. The battery core includes a bare cell, a case, and a top cover, the bare cell is accommodated in an accommodating space formed by being surrounded by the case and the top cover, and the primary collection unit includes: a built-in air pressure and gas collection unit disposed between the top cover and the bare cell, the built-in air pressure and gas collection unit being used to collect air pressure data and at least one type of gas concentration within the case; 2. The battery pack of claim 1, wherein if the atmospheric pressure data is greater than an atmospheric pressure threshold and the gas concentration of any type is greater than a concentration threshold of the corresponding type, the third operating data meets the data detection condition of the corresponding type.

6. 6. The battery pack according to claim 5, wherein the data processing module is further used to indicate the first detection result as a gas generation abnormality in the battery core when the air pressure data is greater than an air pressure threshold, the first temperature data does not meet a temperature runaway condition, and the gas concentration of any type is greater than a concentration threshold of the corresponding type.

7. The battery pack Further, a third collecting module is provided for collecting electrical data corresponding to the battery core, the electrical data including at least one of a voltage value, a current value of a circuit in which the battery core is located, and an insulation resistance value of the battery core; 2. The battery pack according to claim 1, wherein, when the insulation resistance value is smaller than a resistance threshold, the current value is greater than a current threshold, or a rate of decrease in the voltage value is greater than a rate threshold, the third operating data meets a corresponding type of data detection condition.

8. 8. The battery pack according to claim 7, wherein the data processing module is further used to indicate the first detection result as a short-circuit abnormality of a battery core when it determines, based on the electrical data, that the third operating data meets a corresponding type of data detection condition and that the first temperature data does not meet a temperature runaway condition.

9. The second acquisition module a second temperature collection unit that is activated when the first detection result indicates that a thermal runaway risk exists in any of the battery cores and that collects second temperature data of the battery cores after activation, wherein the second operating data includes the second temperature data; 2. The battery pack of claim 1, wherein the data processing module is further used to indicate the second detection result that a secondary thermal runaway risk exists in the battery core when the second temperature data is greater than an external temperature threshold.

10. The second acquisition module Further, an external air pressure and gas collection unit is activated when the first detection result indicates that there is a risk of thermal runaway in any of the battery cores, and after activation, is configured to collect external air pressure data of the battery core module and the concentration of at least one type of gas outside; 10. The battery pack of claim 9, wherein the data processing module is further used to indicate the second detection result as a secondary early warning of abnormal gas generation when the external air pressure data is greater than an external air pressure threshold, the concentration of at least one type of external gas is greater than a corresponding type concentration threshold, and the second temperature data is equal to or less than an external temperature threshold.

11. The second acquisition module a smoke density collecting unit that is activated when the first detection result indicates that there is a risk of thermal runaway in any of the battery cores, and that collects smoke density outside the battery core module after activation, and the second operating data includes the smoke density; 2. The battery pack of claim 1, wherein if the smoke density is greater than an early warning value of the smoke density, the second detection result indicates that there is a secondary thermal runaway risk in the battery core.

12. A power consuming device comprising a battery pack according to any one of claims 1 to 11.

13. A detection method for a battery pack, which is applied to a data processing module, the battery pack includes a battery core module, a first collecting module, and a second collecting module installed outside the battery core module, the battery core module includes at least one battery core, the first collecting module includes at least one first collecting unit, and the first collecting unit is installed in the battery core, the method includes: Obtaining first operating data of the battery core collected by a first collection module; performing thermal runaway detection on the battery core based on the first operating data to obtain a first detection result; When the first detection result indicates that there is a risk of thermal runaway in any of the battery cores, control to activate a second collection module, and acquire second operating data outside the battery cores collected by the second collection module; performing a second detection of whether or not there is a risk of thermal runaway in the battery core based on the second operating data, and obtaining a second detection result; the first collection unit includes a first temperature collection unit and a primary collection unit; The method further comprises: The first temperature collecting unit collects first temperature data of the battery core, and the first operating data includes the first temperature data; The data processing module performs thermal runaway detection on the battery core according to the first temperature data, and when the first temperature data meets a thermal runaway condition, indicates the first detection result as indicating that there is a thermal runaway risk in the battery core; The primary collection unit collects third operating data other than the first temperature data of the battery core, and the first operating data includes the third operating data; the data processing module performs thermal runaway detection on the battery core based on the first temperature data when the third operating data meets a corresponding type of data detection condition; How to detect a battery pack.

14. A computer storage medium that, when executed by a processor, performs the battery pack detection method of claim 13.

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