Battery cell thermal runaway testing device and battery cell testing system

Abstract

The utility model provides a battery cell thermal runaway test device and a battery cell test system, and relates to the technical field of battery detection. The battery cell thermal runaway testing device comprises an explosion-proof box, an explosion-proof valve assembly, a battery fixing clamp, a heating mechanism, a sensor assembly and an integrated interface, the battery fixing clamp is installed in the explosion-proof box, the battery fixing clamp comprises a first clamp end and a second clamp end, a battery assembly is arranged between the first clamp end and the second clamp end, and the battery assembly comprises at least one battery cell to be tested; the anti-explosion valve assembly comprises at least one anti-explosion valve, and the anti-explosion valve is arranged at one end of the anti-explosion box; the heating mechanism is arranged between the first clamp end and the battery assembly, and the heating mechanism is connected with the integrated interface; one end of the sensor assembly is connected to the battery assembly, the other end of the sensor assembly is connected to the integrated interface, and the integrated interface is arranged at the other end of the explosion-proof box. The battery cell thermal runaway testing device can achieve the technical effect of improving the accuracy of battery cell thermal runaway detection.

Description

Technical Field

[0001] The present application relates to the field of battery detection technology, and in particular to a battery cell thermal runaway test device and a battery cell test system. Background Art

[0002] At present, the testing and collection equipment for thermal runaway of battery cells are relatively scattered, and the lack of records of some test processes leads to incomplete analysis. In addition, the test data are not synchronized and inaccurate, resulting in differences in analysis.

[0003] In the prior art, conventional battery cell thermal runaway tests are conducted in an environment exposed to air, which cannot simulate the actual state of the battery cell in the battery pack, resulting in low accuracy in battery cell thermal runaway detection. Utility Model Content

[0004] The purpose of the present application is to provide a battery cell thermal runaway testing device and a battery cell testing system, which can achieve the technical effect of improving the accuracy of battery cell thermal runaway detection.

[0005] In a first aspect, an embodiment of the present application provides a battery cell thermal runaway test device, including an explosion-proof box, an explosion-proof valve assembly, a battery fixing fixture, a heating mechanism, a sensor assembly, and an integrated interface;

[0006] The battery fixing fixture is installed inside the explosion-proof box, the battery fixing fixture includes a first fixture end and a second fixture end, a battery assembly is arranged between the first fixture end and the second fixture end, and the battery assembly includes at least one battery cell to be tested;

[0007] The explosion-proof valve assembly includes at least one explosion-proof valve, and the explosion-proof valve is arranged at one end of the explosion-proof box;

[0008] The heating mechanism is disposed between the first fixture end and the battery assembly, and the heating mechanism is connected to the integrated interface;

[0009] One end of the sensor assembly is connected to the battery assembly, the other end of the sensor assembly is connected to an integrated interface, and the integrated interface is arranged at the other end of the explosion-proof box.

[0010] In the above implementation process, the battery cell thermal runaway test device sets up an explosion-proof box, sets the battery fixing fixture, heating mechanism, and sensor assembly inside the explosion-proof box, and monitors the thermal runaway state of the battery assembly through various sensors in the sensor assembly. The heating mechanism can freely adjust the heating power to heat the battery assembly to trigger thermal runaway; the explosion-proof valve has an explosion-proof pressure relief function to reduce the danger of battery thermal runaway detection; the battery assembly to be tested is fixed and clamped by the battery fixing fixture, which can simulate the actual clamping condition of the battery cell to be tested in the battery pack, and the internal environment of the explosion-proof box can better simulate the actual battery pack installation space to avoid the battery cell thermal runaway test being exposed to the air. The battery cell thermal runaway test device can achieve the technical effect of improving the accuracy of battery cell thermal runaway detection.

[0011] Furthermore, the sensor assembly includes a temperature sampling sensor, which is disposed inside the explosion-proof box and is mounted in a matching manner with the battery assembly.

[0012] In the above implementation process, the temperature sampling sensor is arranged inside the explosion-proof box. The temperature of the battery cell to be tested and the internal ambient temperature of the explosion-proof box can be collected by the temperature sampling sensor, and whether the battery assembly is in a thermal runaway state can be determined by the temperature.

[0013] Furthermore, the sensor assembly also includes a voltage sampling sensor, which is disposed inside the explosion-proof box and is electrically connected to the battery assembly.

[0014] In the above implementation process, the voltage sampling sensor is arranged inside the explosion-proof box. The voltage of the battery cell to be tested can be collected by the voltage sampling sensor, and the voltage can be used to determine whether the battery assembly is in a thermal runaway state.

[0015] Furthermore, the sensor assembly also includes an air pressure sampling sensor, and the air pressure sampling sensor is arranged inside the explosion-proof box.

[0016] In the above implementation process, the air pressure sampling sensor is arranged inside the explosion-proof box. The air pressure in the explosion-proof box can be collected by the air pressure sampling sensor, and the air pressure can be used to determine whether the battery assembly is in a thermal runaway state.

[0017] Furthermore, the sensor assembly also includes a smoke sampling sensor, and the smoke sampling sensor is arranged inside the explosion-proof box.

[0018] In the above implementation process, the smoke sampling sensor is arranged inside the explosion-proof box. The smoke state inside the explosion-proof box can be collected by the smoke sampling sensor, and whether the battery assembly is in a thermal runaway state can be determined according to the smoke state.

[0019] Furthermore, the battery cell thermal runaway test device also includes an explosion-proof infrared monitoring mechanism, which is installed inside the explosion-proof box and is arranged opposite to the battery assembly.

[0020] In the above implementation process, the explosion-proof infrared monitoring mechanism is arranged inside the explosion-proof box, and the test process video of the battery assembly can be captured by the explosion-proof infrared monitoring mechanism, so that the video can be captured without light source.

[0021] Furthermore, the battery cell thermal runaway testing device further includes a collection control mechanism, and the collection control mechanism is connected to the integrated interface.

[0022] In the above implementation process, the heating mechanism, temperature sampling sensor, voltage sampling sensor, air pressure sampling sensor, smoke sampling sensor and explosion-proof infrared monitoring mechanism are connected to the acquisition control mechanism through an integrated interface, and the acquisition control lines of the heating mechanism, temperature sampling sensor, voltage sampling sensor, air pressure sampling sensor, smoke sampling sensor and explosion-proof infrared monitoring mechanism are uniformly connected to the acquisition control mechanism.

[0023] Furthermore, the battery cell thermal runaway testing device also includes a sealing gasket, and the sealing gasket is installed in a matching manner with the explosion-proof box.

[0024] In the above implementation process, the explosion-proof box is sealed by a sealing gasket, simulating the sealed state in the battery pack when testing the battery cell, and has an explosion-proof function.

[0025] Furthermore, the battery assembly includes a plurality of cells to be tested, and the plurality of cells to be tested are arranged side by side, or may be arranged according to actual needs.

[0026] In a second aspect, the present application provides a battery cell testing system, comprising a battery cell thermal runaway testing device as described in any one of the first aspects.

[0027] Other features and advantages disclosed in the present application will be described in the following description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology disclosed in the present application.

[0028] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic structural diagram of a battery cell thermal runaway testing device provided in an embodiment of the present application.

[0031] Figure numerals: explosion-proof box 1; explosion-proof valve assembly 2; battery fixing fixture 3; heating mechanism 4; battery assembly 5; voltage sampling sensor 6; air pressure sampling sensor 7; smoke sampling sensor 8; explosion-proof infrared monitoring mechanism 9; temperature sampling sensor 10; integrated interface 11; acquisition control mechanism 12. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0033] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0034] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0035] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0037] The embodiments of the present application provide a battery cell thermal runaway test device and a battery cell test system, which can be used in the battery cell thermal runaway detection process; the battery cell thermal runaway test device is provided with an explosion-proof box, and a battery fixing fixture, a heating mechanism, and a sensor assembly are arranged inside the explosion-proof box, and the thermal runaway state of the battery assembly is monitored by various sensors in the sensor assembly. The heating mechanism can freely adjust the heating power to heat the battery assembly to trigger thermal runaway, and the explosion-proof valve has an explosion-proof pressure relief function to reduce the danger of battery thermal runaway detection; thus, the battery assembly to be tested is fixed and clamped by the battery fixing fixture, which can simulate the actual clamping condition of the battery cell to be tested in the battery pack, and the internal environment of the explosion-proof box can better simulate the actual battery pack installation space, avoiding the battery cell thermal runaway test being exposed to the air, and the battery cell thermal runaway test device can achieve the technical effect of improving the accuracy of battery cell thermal runaway detection.

[0038] See also Figure 1 , Figure 1 A schematic structural diagram of a battery cell thermal runaway test device provided in an embodiment of the present application, the battery cell thermal runaway test device comprises an explosion-proof box 1, an explosion-proof valve assembly 2, a battery fixing fixture 3, a heating mechanism 4, a sensor assembly and an integrated interface 11;

[0039] Exemplarily, the battery fixing fixture 3 is installed inside the explosion-proof box 1, the battery fixing fixture 3 includes a first fixture end and a second fixture end, a battery assembly 5 is arranged between the first fixture end and the second fixture end, and the battery assembly 5 includes at least one battery cell to be tested;

[0040] Exemplarily, the first clamp end and the second clamp end of the battery fixing clamp 3 clamp the battery assembly 5 from both ends respectively, thereby applying pressure to the battery assembly 5, so that the battery cell to be tested in the battery assembly 5 can simulate the actual clamping condition in the battery pack, thereby ensuring the accuracy of the thermal runaway detection of the battery cell.

[0041] Exemplarily, the explosion-proof valve assembly 2 includes at least one explosion-proof valve, which is disposed at one end of the explosion-proof box 1;

[0042] Exemplarily, the heating mechanism 4 is disposed between the first fixture end and the battery assembly 5 , and the heating mechanism 4 is connected to the integrated interface 11 ;

[0043] In some embodiments, the explosion-proof valve assembly 2 is installed on the side of the explosion-proof box 1, wherein the explosion-proof valve has an explosion-proof pressure relief function, thereby ensuring the safety of thermal runaway detection of the battery cell.

[0044] Exemplarily, by providing a heating mechanism 4 , the heating power can be freely adjusted by the heating mechanism 4 , thereby heating the battery assembly 5 and triggering a thermal runaway state of the battery assembly 5 .

[0045] Exemplarily, one end of the sensor assembly is connected to the battery assembly 5 , the other end of the sensor assembly 5 is connected to the integrated interface 11 , and the integrated interface 11 is provided at the other end of the explosion-proof box 1 .

[0046] In some embodiments, the battery cell thermal runaway test device is provided with an explosion-proof box 1, and a battery fixing fixture 3, a heating mechanism 4, and a sensor assembly are arranged inside the explosion-proof box 1. The thermal runaway state of the battery assembly 5 is monitored by various sensors in the sensor assembly. The heating mechanism 4 can freely adjust the heating power to heat the battery assembly 5 to trigger thermal runaway. The explosion-proof valve has an explosion-proof pressure relief function to reduce the danger of battery thermal runaway detection. Therefore, the battery assembly 5 to be tested is fixed and clamped by the battery fixing fixture 3, which can simulate the actual clamping condition of the battery cell to be tested in the battery pack, and the internal environment of the explosion-proof box 1 can better simulate the actual battery pack installation space to avoid the battery cell thermal runaway test being exposed to the air. The battery cell thermal runaway test device can achieve the technical effect of improving the accuracy of battery cell thermal runaway detection.

[0047] Exemplarily, the sensor assembly includes a temperature sampling sensor 10 , which is disposed inside the explosion-proof box 1 , and the temperature sampling sensor 10 is installed in matching with the battery assembly 5 .

[0048] Exemplarily, the temperature sampling sensor 10 is disposed inside the explosion-proof box 1. The temperature of the battery cell to be tested and the internal ambient temperature of the explosion-proof box 1 can be collected by the temperature sampling sensor 10, and whether the battery assembly 5 is in a thermal runaway state can be determined by the temperature.

[0049] Exemplarily, the sensor assembly further includes a voltage sampling sensor 6 , which is disposed inside the explosion-proof box 1 , and is electrically connected to the battery assembly 5 .

[0050] Exemplarily, the voltage sampling sensor 6 is disposed inside the explosion-proof box 1 , and the voltage of the battery cell to be tested can be collected by the voltage sampling sensor 6 , and whether the battery assembly 5 is in a thermal runaway state can be determined by the voltage.

[0051] Exemplarily, the sensor assembly further includes an air pressure sampling sensor 7 , and the air pressure sampling sensor 7 is disposed inside the explosion-proof box 1 .

[0052] Exemplarily, the air pressure sampling sensor 7 is disposed inside the explosion-proof box 1 , and the air pressure inside the explosion-proof box 1 can be collected by the air pressure sampling sensor 7 , and whether the battery assembly 5 is in a thermal runaway state can be determined by the air pressure.

[0053] Exemplarily, the sensor assembly further includes a smoke sampling sensor 8 , which is disposed inside the explosion-proof box 1 .

[0054] Exemplarily, the smoke sampling sensor 8 is disposed inside the explosion-proof box 1 , and the smoke state in the explosion-proof box 1 can be collected by the smoke sampling sensor 8 , and whether the battery assembly 5 is in a thermal runaway state can be determined based on the smoke state.

[0055] Exemplarily, the battery cell thermal runaway test device further includes an explosion-proof infrared monitoring mechanism 9 , which is installed inside the explosion-proof box 1 , and the explosion-proof infrared monitoring mechanism 9 is arranged opposite to the battery assembly 5 .

[0056] Exemplarily, the explosion-proof infrared monitoring mechanism 9 is disposed inside the explosion-proof box 1 , and the test process video of the battery assembly 5 can be captured by the explosion-proof infrared monitoring mechanism 9 , so that the video can be captured without light source.

[0057] Exemplarily, the battery cell thermal runaway test device further includes a collection control mechanism 12 , and the collection control mechanism 12 is connected to the integrated interface 11 .

[0058] Exemplarily, the integrated interface 11 is connected to the acquisition control mechanism 12, and the acquisition control lines of the heating mechanism 4, the temperature sampling sensor 10, the voltage sampling sensor 6, the air pressure sampling sensor 7, the smoke sampling sensor 8 and the explosion-proof infrared monitoring mechanism 9 are uniformly connected to the acquisition control mechanism 12.

[0059] Exemplarily, the battery cell thermal runaway test device further includes a sealing gasket, which is installed in a matching manner with the explosion-proof box.

[0060] Exemplarily, the explosion-proof box 1 achieves a sealed state through a sealing gasket, simulates a sealed state in a battery pack when testing a battery cell, and has an explosion-proof function.

[0061] Exemplarily, the battery assembly 5 includes a plurality of cells to be tested, and the plurality of cells to be tested are arranged side by side.

[0062] Illustratively, the present application embodiment provides a battery cell testing system, including: Figure 1 The battery cell thermal runaway test device is shown.

[0063] In some embodiments, the battery cell thermal runaway test device and battery cell test system provided in the embodiments of the present application can overcome the shortcomings of the prior art and provide comprehensive, accurate, efficient and real thermal runaway test data; Figure 1The battery cell thermal runaway test device provided in the embodiment of the present application has the functions of collecting temperature, voltage, air pressure, smoke, etc., and comprehensively and synchronously records the test data. The function examples of each device are as follows:

[0064] The explosion-proof box 1 is sealed by means of sealing gaskets and other measures, simulating the sealed state of the battery cell to be tested in the battery pack, and has an explosion-proof function;

[0065] Two explosion-proof valves 2 are installed on the side of the explosion-proof box 1 and have explosion-proof pressure relief function;

[0066] The battery assembly 5 includes three cells to be tested, which are arranged side by side to simulate their actual arrangement in the battery pack;

[0067] The battery fixing fixture 3 is inside the explosion-proof box 1 and is used to fix and clamp the battery cell to be tested, simulating the actual clamping condition of the battery cell to be tested in the battery pack;

[0068] The heating mechanism 4 is inside the explosion-proof box 1 and can freely adjust the heating power to heat the battery cell to be tested to trigger thermal runaway;

[0069] The temperature sampling sensor 10 is inside the explosion-proof box 1 and is used to collect the temperature of the battery cell to be tested and the internal ambient temperature of the explosion-proof box;

[0070] The voltage sampling sensor 6 is inside the explosion-proof box 1 and is used to collect the voltage of the battery cell to be tested;

[0071] The air pressure sampling sensor 7 is inside the explosion-proof box 1 and is used to collect the air pressure inside the explosion-proof box;

[0072] The smoke sampling sensor 8 is inside the explosion-proof box 1 and is used to collect the smoke status inside the explosion-proof box;

[0073] The explosion-proof infrared monitoring mechanism 9 is inside the explosion-proof box 1 and is used to shoot the test process video of the battery cell to be tested, and can be shot without light source;

[0074] The integrated interface 11 is installed on the side of the explosion-proof box 1, integrating the heating mechanism 4, the temperature sampling sensor 10, the voltage sampling sensor 6, the air pressure sampling sensor 7, the smoke sampling sensor 8 and the collection control lines of the explosion-proof infrared monitoring mechanism 9, which are uniformly connected to the collection control mechanism 12.

[0075] The acquisition control mechanism 12 integrates the following functions: controlling the power of the heating mechanism 4, reading the data of the temperature sampling sensor 10, reading the data of the voltage sampling sensor 6, reading the data of the air pressure sampling sensor 7, reading the data of the smoke sampling sensor 8, reading the data of the explosion-proof infrared monitoring mechanism 9, and being able to synchronize, store, and generate curve graphs for all collected data.

[0076] Illustratively, the above-mentioned battery cell thermal runaway test device simulates the actual sealing and clamping state of the battery cell in the battery pack through an explosion-proof box, an explosion-proof valve, and a battery fixing fixture; by collecting temperature, voltage, air pressure, smoke, video and other data, and synchronizing the data, it can more comprehensively analyze the battery cell thermal runaway test state and results.

[0077] In all the embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms are not elaborated in the embodiments of the present application.

[0078] It should be understood that the "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0079] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0080] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery cell thermal runaway test device, characterized in that: It includes an explosion-proof box, an explosion-proof valve assembly, a battery fixing fixture, a heating mechanism, a sensor assembly and an integrated interface; The battery fixing fixture is installed inside the explosion-proof box, the battery fixing fixture includes a first fixture end and a second fixture end, a battery assembly is arranged between the first fixture end and the second fixture end, and the battery assembly includes at least one battery cell to be tested; The explosion-proof valve assembly includes at least one explosion-proof valve, and the explosion-proof valve is arranged at one end of the explosion-proof box; The heating mechanism is disposed between the first fixture end and the battery assembly, and the heating mechanism is connected to the integrated interface; One end of the sensor assembly is connected to the battery assembly, the other end of the sensor assembly is connected to an integrated interface, and the integrated interface is arranged at the other end of the explosion-proof box.

2. The battery cell thermal runaway test device according to claim 1, characterized in that: The sensor assembly includes a temperature sampling sensor, which is arranged inside the explosion-proof box and is installed in a matching manner with the battery assembly.

3. The battery cell thermal runaway test device according to claim 2, characterized in that: The sensor assembly further includes a voltage sampling sensor, which is disposed inside the explosion-proof box and is electrically connected to the battery assembly.

4. The battery cell thermal runaway test device according to claim 2 or 3, characterized in that: The sensor assembly also includes an air pressure sampling sensor, and the air pressure sampling sensor is arranged inside the explosion-proof box.

5. The battery cell thermal runaway test device according to claim 2 or 3, characterized in that: The sensor assembly further comprises a smoke sampling sensor, and the smoke sampling sensor is arranged inside the explosion-proof box.

6. The battery cell thermal runaway test device according to claim 1, characterized in that: The battery cell thermal runaway test device further comprises an explosion-proof infrared monitoring mechanism, which is installed inside the explosion-proof box and is arranged opposite to the battery assembly.

7. The battery cell thermal runaway test device according to claim 1, characterized in that: The battery cell thermal runaway testing device further includes a collection control mechanism, and the collection control mechanism is connected to the integrated interface.

8. The battery cell thermal runaway test device according to claim 1, characterized in that: The battery cell thermal runaway testing device further comprises a sealing gasket, which is installed in a matching manner with the explosion-proof box.

9. The battery cell thermal runaway test device according to claim 1, characterized in that: The battery assembly includes a plurality of cells to be tested, and the plurality of cells to be tested are arranged side by side.

10. A battery cell testing system, characterized in that: It comprises a battery cell thermal runaway testing device as described in any one of claims 1 to 9.

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