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 technology, the application of batteries in various aspects is becoming more and more widespread. However, due to various triggers, the battery may experience thermal runaway, which may cause the battery to release a large amount of heat and harmful gases, resulting in the battery catching fire or even exploding. Summary of the Invention

[0004] The embodiments of the present application provide a battery pack, a power consumption device, a detection method for a battery pack, and a computer storage medium, the purpose of which is to provide a thermal runaway detection scheme, thereby helping to improve the safety of power consumption devices and personnel, and at the same time alleviating the problems of the related art in that the thermal runaway detection error is relatively high and the service life of the temperature sensor is relatively short.

[0005] On the one hand, the present application provides a battery pack, the battery pack comprising: A battery core module may include at least one battery core; A first collection module may include at least one first collection unit, the first collection unit is installed in the battery core, the first collection unit is used to collect first operation 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; and a second collection module, the second collection module being installed outside the battery core module, activated when the first detection result indicates that there is a thermal runaway risk in any of the battery cores, and used to collect second operating data of the battery cores after activation; 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.

[0006] In these embodiments, by providing a battery core module, a first collection module, a second collection module and a data processing module, wherein 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 there is a thermal runaway risk in any battery core, and can collect second operating data of the battery cores after being activated, and the data processing module can further perform a second detection of whether there is a thermal runaway risk in the battery cores based on the second operating data to obtain a second detection result. The first collecting unit is installed in the battery core, which realizes the direct collection of the operating data inside the battery core, and reflects the operating situation inside the battery core more realistically; after confirming the existence of the risk of thermal runaway based on the operating data inside the battery core, the second collecting module outside the battery core module is started, and the second collecting module performs the second detection based on the second operating data collected by the second collecting module, so that the accuracy of the early warning detection of thermal runaway can be improved by the two-stage detection combined with the inside and outside. In addition, the second collecting module is started only when the first detection result indicates the existence of the risk of thermal runaway, and the second collecting module collects the second operating data intermittently, so that the service life of the second collecting module is also extended.

[0007] Optionally, the battery pack comprises: It 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 a thermal runaway risk exists in one of the battery cores), the operation of reducing the battery core temperature can be performed earlier than in the 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 collecting unit comprises: a first temperature collection unit, the first temperature collection unit being used to collect first temperature data of the battery core, the first operating data may include the first temperature data; It may also include a data processing module for performing thermal runaway detection on the battery core using first temperature data, and if the first temperature data meets a thermal runaway condition, indicating the first detection result as indicating that a thermal runaway risk exists 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 the related art.

[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, the first operating data may include the third operating data; The data processing module is used for performing 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, so as 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 the 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: The battery may further include a pressure collection unit, the pressure collection unit corresponds to the first temperature collection unit, the pressure collection unit is attached to the inner surface of the case and / or the electrode plate, the pressure collection unit is used to collect pressure data of the battery core, and the third operating data may include 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 consideration the situation where the internal pressure of the battery core is too large, causing the internal temperature of the battery core to rise and further causing the risk of thermal runaway, the combination of the built-in pressure collection unit and the first temperature collection unit can realize the first early warning of local power-assisted thermal runaway, and in assessing the risk of thermal runaway, the root cause of the occurrence of thermal runaway inside the battery core can be found, providing reference for subsequent analysis and detection of thermal runaway.

[0015] Optionally, the data processing module is further used for indicating 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 local force receiving abnormality or local force receiving abnormality, thereby achieving accurate abnormality analysis of the pressure inside 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 collection unit may include: 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 air pressure data is greater than the air pressure threshold and the gas concentration of any type 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 a built-in air pressure and gas collection unit inside the battery core, it is possible to better detect whether a large amount of gas generation phenomenon occurs inside the battery core, and by further combining with the change in the first temperature data, it is possible to accurately determine thermal runaway of the battery core caused by 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 caused by gas generation can be identified, and accurate abnormality analysis of gas generation inside the battery core can be realized, thereby discovering the cause of thermal runaway and providing a favorable reference basis for subsequent detection and analysis of thermal runaway of the battery core.

[0021] Optionally, the battery pack comprises: The battery core may further include a third collection 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, and an insulation resistance value of the battery core of a circuit in which the battery core is located; 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 embodiments consider the risk of thermal runaway caused by electrical reasons in the battery core, explore the root cause of thermal runaway occurrence inside 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 a corresponding type of data detection condition and the first temperature data does not meet a temperature runaway condition.

[0024] In these embodiments, after the electrical data is judged, 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 the short circuit anomaly of the battery core is determined, so as to realize accurate abnormality analysis of the short circuit of the battery core. And the electrical data is combined with the gas generation and the internal pressure of the battery core to form a primary signal collection system, which triggers the judgment of whether the first temperature data meets the temperature runaway condition, and realizes early warning of the risk of thermal runaway from each root cause of the occurrence of thermal runaway, while at the same time discovering the trigger of the occurrence of thermal runaway in an all-round manner.

[0025] Optionally, the second collection module comprises: and 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 is for collecting 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 a secondary thermal runaway risk exists 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 realization manner for the data processing module to realize the second detection of the risk of thermal runaway based on the second operating data. On the one hand, it can capture the thermal runaway risk signal overflowing from the inside of the battery core, and timely grasp the degree of the thermal runaway risk overflowing from the inside of the battery core; on the other hand, it can reflect the change of the external signal due to the change of the external condition such as the external high temperature, and realize the early warning of the thermal runaway risk caused by the external factor. And the second temperature collecting unit is only activated when the first detection result indicates that there is a risk of thermal runaway in any of the battery cores, so that the non-continuous operation state of the second temperature collecting unit can be avoided from the invalid operation, and the actual operating life of the second temperature collecting unit is greatly improved.

[0027] Optionally, the second collection module comprises: The battery core module may further include an external air pressure and gas collection unit, which is activated when the first detection result indicates that there is a thermal runaway risk in any battery core, and is for collecting external air pressure data of the battery core module and at least one type of gas concentration outside after the activation; The data processing module is further used to indicate the second detection result as a secondary early warning of gas generation abnormality when the external air pressure data is greater than the external air pressure threshold, the external concentration of at least one type of gas is greater than the corresponding type concentration threshold, 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 promptly identified and appropriate measures can be taken. In addition, by combining the internal and external gas and air pressure collecting units and the temperature collecting units, the accuracy of identifying the thermal runaway and gas generation abnormality of the battery pack can be improved and erroneous judgment can be prevented.

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

[0030] This embodiment provides an optional realization manner for the data processing module to realize the secondary detection of thermal runaway risk based on the second operation data by installing the smoke concentration collection unit. On the one hand, it can capture the thermal runaway risk signal overflowing from the inside of the battery core, and timely grasp the degree of thermal runaway risk overflowing from the inside of the battery core; on the other hand, it can reflect the change of the external signal due to the change of external conditions such as external high temperature and high pressure, and realize the early warning of the thermal runaway risk caused by external factors. Furthermore, it can also find the phenomenon of smoke generation in the battery pack and alert the surrounding people to deal with it in a timely manner.

[0031] In addition, the smoke density collecting unit may be installed together with a second temperature collecting unit, and it may be possible to determine whether a secondary thermal runaway risk exists in the battery core based on the data collected by either of the units, thereby improving the accuracy of detecting the external thermal runaway risk, and the smoke density collecting unit is only activated when the first detection result indicates that a thermal runaway risk exists in any of the battery cores, so that the non-continuous operation state of the smoke density collecting unit can be avoided from being ineffective, and the actual operating life of the smoke density collecting unit is 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, the battery core module may include at least one battery core, 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 a thermal runaway risk exists in any of the battery cores, control a second collection module to be activated, and obtain second operating data outside the battery cores collected by the second collection module; The method may also 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 thereon, 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 when executed by a processor, can implement the steps of the battery pack detection method of the above aspect.

[0037] The above description is only an outline 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 more clear and understandable, the following particularly cites specific embodiments of the present application to describe them. [Brief description of the drawings]

[0038] In order to more clearly explain the technical solutions of the embodiments of the present application, the following briefly introduces 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 also obtain other drawings based on the drawings without exerting creative efforts. [Figure 1] FIG. 2 is a schematic diagram of a module structure of an embodiment of a battery pack according to the present application. [Diagram 2] FIG. 2 is a schematic diagram of a module structure of another embodiment of a battery pack according to an embodiment of the present application. [Diagram 3] FIG. 2 is a schematic diagram of a module structure of another embodiment of a battery pack according to 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. [Diagram 5] FIG. 13 is a schematic diagram of another location of the temperature collection unit relative to the battery pack of an embodiment of the present application. [Figure 6] FIG. 13 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. 13 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. 13 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. 13 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] 4 is an optional flowchart of a battery pack detection method according to an embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0039] The following detailed description is given in conjunction with the drawings of the embodiments of the technical solution of the present application. The following embodiments are merely for the purpose of more clearly illustrating the technical solution of the present application, and are merely examples, 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 the present application, and the terms used herein are merely for describing specific embodiments and are not intended to limit the present application, and the terms "including" 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 the non-exclusive "including".

[0041] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are merely for distinguishing 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 technical features indicated. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0042] An "embodiment" referred to in this specification 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. The appearance of this phrase in various places in the specification does not necessarily refer to all the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiments described in this specification can be combined with other embodiments.

[0043] In the description of the embodiments of the present 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, "multiple sets" refers to two or more (including two sets); and "multiple sheets" refers to two or more (including two sheets).

[0045] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc. are orientations or positional relationships shown based on the drawings, and are intended only to facilitate and simplify the description of the embodiments of the present application, and do not indicate or imply that the devices or elements referred to have a specific orientation and 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, the power battery can be the main power source of the power consumption device (such as a vehicle, ship, or spacecraft), while the energy storage battery can be the charging source of the power consumption device, and the importance of both goes without saying. For example and not for limitation, in some application scenarios, the power battery can be the battery in the power consumption device, and the energy storage battery can be the battery in the charging device. For convenience of description, in the following, the power battery and the energy storage battery can both be collectively referred to as batteries.

[0047] With the development of new energy technology, 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 increases day by day, the risk of thermal runaway will also show an increasing trend.

[0048] When providing early warning of battery thermal runaway, related technologies generally use a temperature sensor installed in the battery pack to measure early characteristic parameters of thermal runaway, and then combine the measured characteristic parameters with an evidence theory model to provide 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] In order to solve the above technical problems, the present application provides a battery pack, a power consumption device, a detection method for a battery pack, 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 module structure schematic diagram of one optional 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 collection module 120, a data processing module 130 and a second collection 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 collection unit 121, and the data processing module 130 is used for performing thermal runaway detection on the battery core 111 based on the first operating data, and obtaining 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 or not 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 core 111 included in the battery core module 110 based on the first operation data, and obtain a first detection result. The second collection module 140 is connected to the data processing module 130, and can be activated when the first detection result indicates that there is a thermal runaway risk in any of the battery cores 111, and can collect second operation data of the battery cores 111 after being activated, and the data processing module 130 can further perform a second detection of whether there is a thermal runaway risk in the battery cores 111 based on the second operation data, and obtain a second detection result. Since the first collection unit 121 is installed in the battery core 111, it can directly collect the operating data inside the battery core 111, and can more realistically reflect the operating conditions inside the battery core 111. After determining that there is a risk of thermal runaway based on the operating data inside the battery core 111, the second collection module 140 outside the battery core module 110 is started, and then a second detection is performed based on the second operating data collected by the second collection module 140, so as to improve the accuracy of the thermal runaway early warning detection through two-stage detection combined with the inside and outside. In addition, the second collection module 140 is only started when the first detection result indicates that there is a risk of thermal runaway, and is in an intermittent collection state, 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, 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 or cylindrical battery core.

[0058] Each first collecting unit 121 may include a single or multiple collecting elements, all of which are provided in the battery core 111. The collecting elements may be sensors or other collecting elements for acquiring first operating data. Exemplarily, the first collecting unit 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, which makes them suitable for stable installation inside the battery core 111.

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

[0060] The first operating data is related to a type of the first collecting unit 121, and illustratively, 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 a gas concentration collected by the gas collecting unit.

[0061] When performing thermal runaway early warning, the data processing module 130 can check whether any battery core 111 in the battery pack 100 meets the thermal runaway detection condition based on the first operating data in combination with the operating conditions of different first operating data, and when any battery core 111 meets 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 core 111 in the battery pack 100 that meets 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, when none of the battery cores 111 meet the thermal runaway detection condition, the first detection result indicates that none of the battery pack 100 and all 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, that is, 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 being activated.

[0063] The second operating data is mainly environmental data in the battery pack 100 of the battery core 111, and 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, gas concentration, etc. in 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, the second operating data can be transmitted 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 thermal runaway risk in the battery core 111 / battery pack 100, it can trigger a secondary thermal runaway early warning at this time.

[0066] It should be explained that the primary signal collection mechanism inside the battery core 111 and the corresponding thermal runaway early warning method 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. On the one hand, it can capture the thermal runaway risk signals overflowing from inside the battery core 111, and on the other hand, it can also reflect the changes in external signals due to changes in external conditions such as external mechanical pressure, high temperature, etc., so as to realize 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 can be combined with the secondary verification by the second collection module 140 to mutually complement and verify the first and second operating data collected inside and outside, thereby improving the accuracy of detection and state judgment of the inside and outside of the battery core 111 and the battery pack 100, and overcoming the erroneous judgment caused by a single signal collection module making an early warning judgment. 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, and such a non-continuous operating state can avoid invalid operation, and the actual operating life of the second collection module 140 is greatly improved.

[0068] In some embodiments, when the second operation data is used to perform the second detection of the risk of thermal runaway, if the detection result is normal, the second detection can be continued until the first early warning of thermal runaway is released. It should be noted that when the first early warning is generated, it indicates that there is already a risk of thermal runaway inside the battery core 111, but it may not overflow to the outside of the battery core 111. At this time, until the first operation data of each item inside the battery core 111 is restored to normal, the risk of thermal runaway can be eliminated by cooling measures such as thermal management, the first early warning can be released, and the second detection can be stopped, so that it can be continuously detected whether the risk of thermal runaway inside the battery core 111 overflows, and the safety of the environment in which the battery pack 100 is located can be ensured.

[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 can 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 is obtained, indicating 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 realize 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 scheme of the thermal management module 210.

[0071] The above-mentioned measure of the thermal management module 210 to balance the temperature of the battery core 111 can be designed according to actual needs in combination with the related art before the filing date of this application, and will not be described further here. The embodiment of this application mainly emphasizes the timing of the thermal management module 210 to balance 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 thermal runaway risk in one of the battery cores 111), the operation of reducing the battery core 111 temperature can be performed earlier than in the related art, which helps reduce the risk of thermal runaway of 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 temperature runaway condition, the data processing module 130 can indicate that the first detection result is that there is a thermal runaway risk in the battery core 111, and at this time, trigger a thermal runaway primary early warning.

[0076] The first temperature collecting unit 310 may be a temperature sensor or other temperature collecting equipment used for temperature collection. The type of the temperature sensor may be one or more of optical fiber sensor, bimetal thermometer, glass liquid thermometer, pressure thermometer, resistance thermometer, thermistor, and temperature difference couple, 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 explained that the battery core 111 mentioned above may include a bare cell, which is further accommodated in an accommodating space formed by a top cover and a case. The bare cell may be formed by winding a separator and a plate. For example, referring to Fig. 3 to Fig. 5 together, Fig. 4 and Fig. 5 show schematic diagrams of selective distribution positions of the first temperature collecting unit 310 when the plate in the battery core 111 is a wound structure (i.e., positions shown in circle numbers 1 to 4 in the figures). The plate may be a positive plate, and the plate may be wound around a winding axis to form a wound structure, and the plate may include a plurality of flat parts 410 and a plurality of folded parts 420, and the plurality of flat parts 410 may be stacked and installed along a first direction X, and the plurality of folded parts 420 are at least partially folded in an arc and connected to two adjacent flat parts 410, and the first direction X is perpendicular to the winding axis. The first temperature collection 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 plate inside the battery core 111, and may also be attached to the flat portion 410 of the outermost / innermost plate inside the battery core 111. Of course, the first temperature collecting unit 310 may also be attached to an intermediate plate.

[0079] The first temperature data complying with the temperature runaway condition may be that the first temperature data exceeds a 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, and 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 explained that when the first temperature collecting units 310 are 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] In these embodiments, a selective thermal runaway early warning method is provided by 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 the related art.

[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 a 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, performs 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 the occurrence of different thermal runaway phenomena inside the battery core 111.

[0086] For example, if the risk of thermal runaway may be due to a 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, so as to eliminate possible abnormalities 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 FIG. 4 to FIG. 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] This pressure collecting unit 710 may correspond to the first temperature collecting unit 310, and the pressure collecting unit 710 may be attached to the flat portion 410 and / or the folded portion 420 shown in Figures 4 and 5, and may further be attached to the inner surface of the case. The pressure collecting unit 710 can 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 above pressure collection units 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, and 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, the 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 battery adhesive to form a temperature and pressure collection array, which may be of thin film type and has good flexibility, making it suitable for installation at different positions inside the battery core 111.

[0094] 7, and in combination with 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 plate of the battery core 111, and may also be installed at some 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 plate.

[0095] It is described that pressure collection units 710 are installed on the flat portion 410 of the innermost plate of the battery core 111, the folded portion 420 of the outermost 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 plate of the battery core 111 is the first pressure data P1, the pressure data measured on the folded portion 420 of the outermost 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 among 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 the pressure data in the first pressure data P1 to the third pressure data P3 are equal to or less than the corresponding pressure threshold value, the pressure collection unit 710 can continue detection.

[0098] In these embodiments, taking into consideration the situation where the internal pressure of the battery core 111 is too large, causing the internal temperature of the battery core 111 to rise, and further causing 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 power-assisted thermal runaway, and in assessing the risk of thermal runaway, the root cause of the thermal runaway inside the battery core 111 can be found out, and reference can be provided for subsequent analysis and detection of thermal runaway.

[0099] Continuing to refer to FIG. 7, 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 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, when 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 at this time. However, this force receiving abnormality phenomenon does 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 alarm 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 local force receiving abnormality or local force receiving abnormality, thereby achieving accurate abnormality analysis that the internal pressure of the battery core 111 is 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 above 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 the built-in air pressure and gas collecting unit 810 may collect air pressure data and at least one type of gas concentration inside the case, where if the air pressure data is greater than the air pressure threshold and any type of gas concentration is greater than the corresponding type concentration threshold, confirm that the third operating data meets the corresponding type of 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 react with each other to produce a large amount of explosive gases (e.g., hydrogen gas, carbon monoxide), volatile organic compounds (VOCs) and carbon dioxide, and the gas pressure will also rise rapidly at this time, which is likely to cause thermal runaway. By installing the built-in air pressure and gas collection unit 810 inside the battery core 111, it can be better detected whether a large amount of gas generation occurs inside the battery core 111, and further combine with the change of the first temperature data to accurately determine the thermal runaway of the battery core 111 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, where the gas collection unit can include a semiconductor gas sensor sensitive to various gases, or the gas collection unit can be a gas sensor array fabricated by integrating semiconductor gas sensors. The air pressure collection unit can be an air pressure sensor or other, and the type of the air pressure sensor can include one or more of strain gauge, piezo-resistance type, electromagnetic type, capacitor type, piezoelectric type, capacitive type, and vibrating string type.

[0106] The above gas sensor type may include multiple types, and can realize the detection of multiple different component contents after being integrated into a gas sensor array, while saving space. The gas sensor is 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 can also be used to detect organic compounds that are affected by temperature and have relatively large volatility, for example, the above 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 gas are equal to or less than the corresponding types of gas concentration thresholds, then the gas generation inside the battery core 111 is normal, and the detection of the gas pressure and gas concentration can be continued.

[0108] When 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 recognized that gas generation inside the battery core 111 is abnormal. Furthermore, it can check whether the first temperature data is greater than the temperature threshold, and when the first temperature data is greater than the temperature threshold, it is recognized that there is a risk of thermal runaway inside the battery core 111 due to abnormal gas generation, and conversely, it is recognized that abnormal gas generation has occurred 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 of each type can be set based on the effect of the actual gas concentration on thermal runaway, and the gas concentration thresholds of each type can 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 gas concentration of type i, and is combined with a pressure threshold value 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 above 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] Here, if the first temperature data does not meet the temperature runaway condition, it indicates that the inside of the battery core 111 does not reach 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 or abnormal gas generation due to gas generation can be confirmed, and an accurate abnormal analysis of gas generation inside the battery core 111 can be realized, so that the cause of thermal runaway can be found, and a favorable reference basis can be provided for the subsequent detection and analysis of thermal runaway of the battery core 111.

[0113] It should be noted that the related art has a combustible gas detection method, and the target of the combustible gas detection is the gas that has overflowed into the battery pack 100. In fact, the gas in the battery core 111 accumulates to a certain amount, and when the air pressure reaches a limit, it breaks through the explosion-proof valve and overflows. Therefore, the related art has a delay in detection and early warning, and there is a risk of reducing the evacuation time of personnel. And the combustible gas detection mainly detects VOC gas. Therefore, compared with the related art, in these embodiments, the built-in air pressure and gas collection unit 810 is installed inside the battery core 111, and can detect the concentration of various types of gases such as carbon monoxide, carbon dioxide, and methane, so that the thermal runaway early warning method has a higher reliability, which is helpful in improving the range of thermal runaway risk early warning and reducing the error.

[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 a voltage value, a current value of the circuit in which the battery core 111 is located, and an insulation resistance value of the battery core 111.

[0116] The above-mentioned 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, at least one of the insulation resistance value, the voltage value decrease rate, and the current value meets the condition, and the third operating data meets the electrical type data detection condition.

[0117] It should be noted that if the above electrical type data detection condition is met, it indicates that the circuit in which the battery core 111 is located may have a short circuit or has serious self-discharge, which is likely to cause a thermal runaway risk. It is necessary to further combine the first temperature data with whether it meets the temperature runaway condition, thereby determining whether the battery core 111 has a short circuit abnormality or there is a thermal runaway risk caused by the short circuit.

[0118] In these embodiments, the risk of thermal runaway caused by electrical reasons in the battery core 111 is taken into consideration, and the root cause of the occurrence of thermal runaway within the battery core 111 is explored, providing reference for the analysis and detection of subsequent thermal runaway.

[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 when determining based on the electrical data that the third operating data meets a corresponding type of data detection condition and the first temperature data does not meet a 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 of the battery core 111, thereby realizing accurate abnormality analysis of the short circuit of the battery core 111.

[0121] In these embodiments, a primary signal collection system is formed in combination with electrical data, gas generation, and internal pressure of the battery core 111, which triggers a judgment as to whether the first temperature data meets the temperature runaway condition, thereby realizing an early warning of the risk of thermal runaway 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.

[0122] Based on the above embodiment, yet another embodiment of the battery pack 100 of the present application is provided, in which the above second collection module 140 may include a second temperature collection unit 141. The 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 value.

[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 collecting unit 141 to start up and obtain second temperature data from the second temperature collecting 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 may be distributed around other components of the battery pack 100 other than the battery core module 110. The second temperature collecting unit 141 can detect the temperature of the module and the temperature inside the battery pack 100, and 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 at this time, but no overflow risk has occurred.

[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; on the other hand, it can reflect changes in external signals due to changes in external conditions such as external high temperature, and realize early warning of thermal runaway risks caused by external factors.

[0127] This embodiment provides an optional realization manner for the data processing module 130 to realize the second detection of the risk of thermal runaway based on the second operating data by installing the second temperature collecting unit 141. And the second temperature collecting unit 141 is activated only when the first detection result indicates that there is a risk of thermal runaway in any of the battery cores 111, so that the non-continuous operation state of the second temperature collecting unit 141 can be avoided from being ineffective, 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 above-mentioned external air pressure and gas collection unit 142 is activated when the first detection result indicates that there is a thermal runaway risk in any battery core 111, and after activation, it can collect external air pressure data of the battery core module 110 and at least one type of external gas concentration.

[0130] The data processing module 130 may further be used to indicate the second detection result as a secondary early warning of gas generation anomaly 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 corresponding type concentration threshold, and the second temperature data is equal to or less than 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 described further here.

[0132] When an external gas generation abnormality is found by the external air 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 when the second temperature data is greater than the corresponding temperature threshold, a secondary alarm for gas generation thermal runaway can be issued to improve the risk level of thermal runaway; conversely, a secondary alarm for gas generation abnormality can be issued to improve the risk level of gas generation abnormality.

[0133] It should be noted that when the external pressure and gas collecting unit 142 detects an abnormality in external gas generation, it means that the abnormality in gas generation has caused the gas to break the explosion-proof valve of the battery core module 110 and overflow outside the battery core 111, which means that the situation is relatively dangerous. By presenting the risk level in different situations, the cause of the abnormality and the degree of danger of the battery pack 100 can be grasped in a timely manner, and corresponding measures can be taken. In addition, by combining the internal and external gas and pressure collecting units and the temperature collecting units, the accuracy of identifying the thermal runaway and gas generation abnormality of the battery pack 100 can be improved and erroneous judgment can be prevented.

[0134] Still 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 second collecting module 140 may include a smoke density collecting unit 143 .

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

[0136] The smoke density collecting unit 143 may be distributed around the battery core module 110 and at other positions of the battery pack 100 other than the battery core module 110, and can respectively detect the smoke density in the module and the battery pack 100, and further compare each smoke density with each smoke density early warning value, and when any smoke density exceeds the corresponding smoke density early warning value, it indicates that there is a secondary thermal runaway risk in the battery core 111, and can issue a secondary early warning signal of the thermal runaway smoke of the battery core 111 through the data processing module 130, so as to improve the thermal runaway risk level and at the same time inform the surrounding people of the risk of smoke inhalation, etc. Conversely, when all the smoke densities collected by the smoke density collecting unit 143 do not exceed the smoke density early warning value, it indicates that there is still a thermal runaway risk in the battery core 111 at this time, but there is no temporary overflow risk.

[0137] This solution 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 the change in the external signal due to the change in the external conditions such as external high temperature and high pressure, and realize the early warning of the thermal runaway risk caused by external factors. Furthermore, it can also detect the phenomenon of smoke generation in the battery pack 100 and alert the surrounding people to deal with it in a timely manner.

[0138] In this embodiment, the smoke density collecting unit 143 is installed to provide an optional implementation manner for the data processing module 130 to realize the secondary detection of the thermal runaway risk according to the second operation data. The smoke density collecting unit 143 may be installed together with the second temperature collecting unit 141, and the existence of the secondary thermal runaway risk in the battery core 111 can be confirmed according to the data collected by either unit, so as to improve the accuracy of the external thermal runaway risk detection. And the smoke density collecting unit 143 is only activated when the first detection result indicates that the thermal runaway risk exists in any battery core 111, so that the non-continuous operation state of the smoke density collecting unit 143 can be avoided from being invalid, and the actual operation life of the smoke density collecting unit 143 is greatly improved.

[0139] Above, in combination with Figures 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, the method being applied to a data processing module, the battery pack may include a battery core module, a first collection module and a second collection module installed outside the battery core module, the battery core module may include at least one battery core, the first collection module may include at least one first collection unit, the first collection 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 a second collection module to be started, 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 realizing the direct collection of the operating data inside the battery core, which can more realistically reflect the operating situation inside the battery core, and after confirming the existence of the risk of thermal runaway based on the operating data inside the battery core, the second collection module outside the battery core module is activated, and then the second collection module performs secondary detection based on the second operating data collected by the second collection module, thereby improving the accuracy of the thermal runaway early warning detection through two-stage detection combined with the inside and outside. Also, when the first detection result indicates the existence of the risk of thermal runaway, it is activated and is in an intermittent collection state, which improves 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 which after S102, the method includes: In S105, when the first detection result indicates that there is a thermal runaway risk in any of the battery cores, the method further includes controlling the thermal management module to balance the temperature 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 a thermal runaway risk exists in one of the battery cores), the operation of reducing the battery core temperature can be performed earlier than in the 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, where 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 above-mentioned third operating data can be set with reference to the above. In these embodiments, a primary signal collection system can be formed in conjunction with the third operating data similar to electrical data, gas generation, and battery core internal pressure, thereby triggering a judgment of whether the first temperature data meets the temperature runaway condition, and realizing an early warning of the risk of thermal runaway from each root cause of the occurrence of thermal runaway, while at the same time discovering the triggers of the occurrence of thermal runaway 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, including a computer program, which, when executed by a processor, can realize the steps and corresponding contents of the embodiments of the method.

[0149] Although the present application has been described with reference to the 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, each technical feature mentioned 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 collection unit; 141: second temperature collection unit; 142: external air pressure and gas collection unit; 143: smoke concentration collection 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 comprising: 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, the data processing module being used to perform thermal runaway detection on the battery core based on the first operating data and 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 thermal runaway risk 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 used to perform a second detection of whether or not there is a thermal runaway risk in the battery core using the second operating data, and to obtain a second detection result.

2. The battery pack includes:

2. The battery pack of claim 1, further comprising 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.

3. 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; 2. The battery pack of claim 1, wherein the data processing module is used to perform thermal runaway detection on the battery core using the first temperature data, and when the first temperature data meets a temperature runaway condition, to indicate that the first detection result indicates that a thermal runaway risk exists in the battery core.

4. 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, the first operating data including the third operating data; 4. The battery pack according to claim 3, wherein the data processing module is used to perform thermal runaway detection on the battery core by the first temperature data when the third operating data meets a corresponding type of data detection condition.

5. The battery core includes a case and a plate housed in the case, and the primary collection unit includes: a pressure collecting unit, the 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 of claim 4 , wherein, if the pressure data is greater than a pressure threshold, the third operating data meets a corresponding type of data detection condition.

6. 6. The battery pack of claim 5, wherein the data processing module is further used to indicate the first detection result as a power receiving abnormality of a battery core when the pressure data is greater than a pressure threshold and the first temperature data does not comply with a temperature runaway condition.

7. The battery core includes a bare cell, a case, and a top cover, the bare cell is accommodated in an accommodating space defined 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 for collecting air pressure data and at least one type of gas concentration within the case; 5. The battery pack of claim 4, wherein when the air pressure data is greater than an air pressure threshold and the gas concentration of any type is greater than a concentration threshold of the corresponding type, the third operating data meets a data detection condition of the corresponding type.

8. 8. The battery pack of claim 7, wherein the data processing module is further used to indicate the first detection result as a gas generation abnormality in a 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 a corresponding type.

9. The battery pack includes: Further comprising a third collecting module 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; 5. The battery pack of claim 4, 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.

10. 10. The battery pack of claim 9, wherein the data processing module is further used to indicate the first detection result as a short circuit abnormality of a battery core when the data processing module determines based on the electrical data that the third operating data meets a corresponding type of data detection condition and the first temperature data does not meet a temperature runaway condition.

11. The second collection module includes: 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, the second operating data including the second temperature data; 2. The battery pack of claim 1, wherein the data processing module is further used to indicate that a secondary thermal runaway risk exists in a battery core when the second temperature data is greater than an external temperature threshold.

12. The second collection module includes: Further comprising an external air pressure and gas collection unit, which is activated when the first detection result indicates that there is a thermal runaway risk in any of the battery cores, and which is for collecting external air pressure data of the battery core module and at least one type of gas concentration outside after being activated; The battery pack of claim 11, wherein the data processing module is further used to indicate the second detection result as a secondary early warning of gas generation abnormality 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.

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

14. A power consuming device comprising a battery pack according to any one of claims 1 to 13.

15. 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 collection module and a second collection module installed outside the battery core module, the battery core module includes at least one battery core, the first collection module includes at least one first collection unit, and the first collection 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 a second collection module to be activated, and obtain second operating data outside the battery cores collected by the second collection module; A battery pack detection method including: secondly detecting 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.

16. 20. A computer storage medium which, when executed by a processor, performs the method of detecting a battery pack of claim 15.

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