Battery thermal runaway exhaust testing device

Abstract

The utility model discloses a battery thermal runaway exhaust testing device which comprises a shell, a thermal runaway triggering piece and an exhaust amount measuring assembly, the shell is provided with a cavity and an exhaust port, the cavity is used for containing a battery cell, the thermal runaway triggering piece is arranged in the cavity and used for triggering the battery cell to generate thermal runaway, and the exhaust amount measuring assembly is arranged in the cavity. The gas displacement measuring assembly comprises an exhaust pipe and a mass measuring piece, one end of the exhaust pipe is connected with the exhaust port, and the mass measuring piece is arranged on a pipeline of the exhaust pipe so as to measure the gas displacement when the battery cell is subjected to thermal runaway. The testing device can improve the accuracy of battery thermal runaway gas displacement measurement.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of battery thermal runaway testing, and in particular to a battery thermal runaway exhaust testing device. Background Art

[0002] With the development of new energy vehicles, the safety of lithium batteries, as the power source of these vehicles, has attracted close attention. Misuse of lithium batteries or collisions can cause them to overheat, leading to thermal runaway, a serious threat to life and property. Therefore, thermal runaway testing of batteries and battery packs is extremely important.

[0003] The existing technology uses the mass loss method, which places the battery on an electronic scale for testing, and obtains the gas production of the battery at different times by recording the change pattern of battery mass over time when thermal runaway occurs.

[0004] However, during battery thermal runaway, exhaust will generate eruption pressure, which will act on the electronic scale and affect the weighing of the electronic scale. At the same time, the thermal runaway process will not only produce gas but also particulate matter. If the particulate matter is ejected from the electronic scale, it will also affect the weighing of the electronic scale. Therefore, the exhaust volume measurement accuracy is low. Utility Model Content

[0005] In view of the above-mentioned defects or deficiencies in the relevant technology, it is desired to provide a battery thermal runaway exhaust test device that can improve the accuracy of battery thermal runaway exhaust volume measurement and provide more accurate parameters for lithium battery thermal safety research.

[0006] The present application provides a battery thermal runaway exhaust test device, which is characterized by comprising:

[0007] A housing having a cavity and an exhaust port, wherein the cavity is used to accommodate the battery cell;

[0008] a thermal runaway triggering component, which is disposed in the cavity and is used to trigger thermal runaway of the battery cell;

[0009] An exhaust volume measurement component includes an exhaust pipe and a mass measuring component. One end of the exhaust pipe is connected to the exhaust port. The mass measuring component is arranged on the pipeline of the exhaust pipe to measure the exhaust volume when the battery cell has thermal runaway.

[0010] In an optional embodiment, the testing device further comprises a clamping assembly, wherein one side of a clamping member of the clamping assembly elastically presses against the inner side of the shell, the other side of the clamping member elastically presses against the battery cell, and the tightening assembly avoids the exhaust port.

[0011] In an optional embodiment, the clamping assembly further includes a driving member connected to the clamping member, the clamping member is compressible along a first direction, the first direction being the direction from the cavity to the shell, and the driving member is used to drive the tightening member to be compressed along the first direction to press the clamping member against the inner side of the shell.

[0012] In an optional embodiment, the clamping member and the shell are respectively provided with a matching first mounting hole and a second mounting hole, and the driving member is sequentially passed through the second mounting hole and the first mounting hole and connected to the clamping member.

[0013] In an optional embodiment, the clamping member includes a clamping body and an elastic member, and the elastic member is connected to a side of the clamping body facing the housing.

[0014] In an optional embodiment, the clamping body is a compressible part, a pressing plate is provided in the clamping part, along the first direction, the projection of the elastic part on the shell is located within the projection of the pressing plate on the shell, and the driving part is connected to the pressing plate.

[0015] In an optional embodiment, the thermal runaway triggering component is a heating plate, and the heating plate is in contact with a side of the clamping component facing the cavity.

[0016] In an optional embodiment, the housing has a first side surface and a second side surface, and an area of ​​the first side surface is larger than an area of ​​the second side surface;

[0017] One side of the clamping member elastically presses against the first side surface.

[0018] In an optional embodiment, the shell is provided with a limit groove, the limit groove is used to insert a limit plate, when the elastic member is at the maximum compression amount, the clamping member avoids the limit groove, and the limit plate is inserted in the limit groove to limit the clamping member.

[0019] In an optional embodiment, the exhaust pipe includes a large inner diameter section at both ends and a small inner diameter section in the middle, and the mass measuring member is provided in the small inner diameter section.

[0020] The present application provides a battery thermal runaway exhaust test device. Taking into account the eruption pressure generated by the exhaust in the process of measuring the exhaust volume of the battery thermal runaway by the mass loss method in the prior art, and the influence of the particulate matter generated by the exhaust on the weighing of the electronic scale, the accuracy of the battery thermal runaway exhaust measurement is low. The battery thermal runaway exhaust test device provided by the present application includes a shell, a thermal runaway trigger and an exhaust volume measurement assembly. When it is necessary to measure the exhaust volume of the battery thermal runaway, the battery cell is placed in the cavity of the shell, and the thermal runaway trigger provided in the cavity triggers the battery cell to undergo thermal runaway and exhaust. The gas enters the exhaust pipe connected to the exhaust port through the exhaust port of the shell, and then the mass measuring part provided on the exhaust pipe line measures the amount of gas passing through the exhaust pipe. The measuring device provided by the present application will not be affected by the eruption pressure generated by the exhaust and the particulate matter generated by the exhaust during the measurement process. All the gas generated by the battery thermal runaway enters the exhaust pipe through the exhaust port and is measured by the mass measuring part on the exhaust pipe line, so the measurement accuracy is high.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 An exploded view of a battery thermal runaway exhaust test device according to an embodiment of the present application;

[0024] Figure 2 Another exploded view of the battery thermal runaway exhaust test device according to an embodiment of the present application;

[0025] Figure 3 An exploded view of a clamping assembly in a test device provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of the structure of the shell body of the test device provided in an embodiment of the present application;

[0027] Figure 5 This is a schematic structural diagram of the upper cover in the testing device provided in an embodiment of the present application.

[0028] Reference numerals:

[0029] 1. Test device;

[0030] 10. Housing; 20. Thermal runaway trigger; 30. Exhaust volume measurement assembly; 40. Clamping assembly; 50. Thermal insulation; 60. Limiting plate;

[0031] 10a, cavity; 10b, exhaust port; 10c, second mounting hole; 10d, limit groove; 10e, positioning groove; 11, shell body; 12, upper cover;

[0032] 111. First side surface; 112. Second side surface; 113. Bottom surface; 121. Positioning block;

[0033] 31. Exhaust pipe; 32. Mass measuring parts;

[0034] 311. Large inner diameter section; 312. Small inner diameter section;

[0035] 41. Clamping member; 42. Driving member;

[0036] 41a, first mounting hole; 41b, groove; 411, clamping body; 4111, elastic mounting hole; 412, elastic member; 413, pressing piece; 4131, pressing piece mounting hole. DETAILED DESCRIPTION

[0037] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0038] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0039] New energy vehicles have developed rapidly in recent years. As the power source of these vehicles, the safety of lithium batteries has attracted close attention. Misuse of lithium batteries or collisions can cause them to overheat, leading to thermal runaway and posing a serious threat to life and property. Therefore, thermal runaway testing of batteries and battery packs is extremely important. When testing single-cell batteries for thermal runaway, the exhaust volume and temperature at the time of thermal runaway are key test parameters that need to be acquired. Collecting the exhaust gas also allows for further analysis of its composition, enabling the development of new thermal runaway prevention and control solutions to improve lithium battery safety.

[0040] The mass loss method is currently used to measure gas emissions during thermal runaway. Specifically, the battery is placed on an electronic scale for testing and the change in battery mass over time during thermal runaway is recorded to determine the gas production at different times. However, this method ignores the effect of the ejection pressure on the weight during the exhaust process. Furthermore, thermal runaway generates not only gas but also particulate matter. If these particles are ejected from the electronic scale, they will affect the weight. Therefore, the gas emissions measured by this method are biased upwards.

[0041] To address the above issues, this application provides a battery thermal runaway exhaust test device that can improve the accuracy of battery thermal runaway exhaust volume measurement and provide more accurate parameters for lithium battery thermal safety research. The structure of the battery thermal runaway exhaust test device 1 provided in this application is described below.

[0042] like Figure 1 As shown, Figure 1 This is an exploded diagram of a battery thermal runaway exhaust test device 1 provided in this application, consisting of Figure 1 It can be seen that the testing device 1 includes a housing 10 , a thermal runaway trigger 20 and an exhaust gas volume measurement assembly 30 .

[0043] Among them, Figure 1 As shown, the housing 10 has a cavity 10a and an exhaust port 10b.

[0044] The cavity 10a can be used to accommodate the battery cell, the thermal runaway trigger 20, etc. The cavity 10a can be a sealed cavity. The exhaust port 10b can be connected to the cavity 10a so that the gas in the cavity 10a can be discharged through the exhaust port 10b. There can be one or more exhaust ports 10b. The exhaust port 10b can be located at any position on the housing 10, as long as it can communicate with the cavity 10a.

[0045] The thermal runaway trigger 20 can be fixedly disposed within the cavity 10a or movably disposed within the cavity 10a. The thermal runaway trigger 20 can be spaced apart from the battery cell or positioned in close proximity. The thermal runaway trigger 20 can trigger thermal runaway in the battery cell by heating, overcharging, or puncture.

[0046] The exhaust volume measurement assembly 30 includes an exhaust pipe 31 and a mass measurement member 32. One end of the exhaust pipe 31 is connected to the exhaust port 10b so that gas exhausted through the exhaust port 10b can enter the exhaust pipe 31. The exhaust pipe 31 and the exhaust port 10b can be sealed together. For example, a sealing ring is provided between the exhaust pipe 31 and the exhaust port 10b.

[0047] The mass measuring part 32 is arranged on the pipeline of the exhaust pipe 31, and can measure the exhaust volume when the battery cell has thermal runaway. The mass measuring part 32 can measure the mass of the gas, and the measured gas mass will not be affected by the pressure and particulate matter generated by the exhaust during thermal runaway, and has high accuracy.

[0048] The mass measuring part 32 can be a mass flow meter, which can be an indirect measurement type. For example, the mass flow meter is an orifice flow meter, a laminar mass flow meter, a turbine flow meter, a vortex flow meter, an electromagnetic flow meter, a rotor flow meter, an ultrasonic flow meter and an elliptical gear flow meter, etc.; it can also be a direct measurement type. For example, the mass flow meter is a calorimetric type, an angular momentum type, a gyroscopic type and a double impeller type, etc.

[0049] In an optional embodiment, if Figure 1 and Figure 2 As shown, the testing device 1 further includes a clamping assembly 40 .

[0050] One side of the clamping member 41 of the clamping assembly 40 elastically presses against the inner side of the housing 10 , and the other side of the clamping member 41 elastically presses against the battery cell, and the clamping assembly 40 avoids the exhaust port 10 b.

[0051] The clamping assembly 40 may be one or more than two. For example, the clamping assembly 40 may be one, two, three, four, six, nine, etc. When there are two or more clamping assemblies 40, the clamping members 41 of the clamping assembly 40 may be spaced apart around the battery cell. Preferably, two or more clamping members 41 may clamp the battery cell. Furthermore, the two or more clamping members 41 may be evenly distributed around the battery cell.

[0052] The clamping member 41 elastically presses between the housing 10 and the battery cell, thereby improving the stability of the battery cell and making it less likely for the battery cell to collide with the housing 10 when thermal runaway occurs, thereby preventing the battery cell from being damaged by collision or squeezed.

[0053] The clamping assembly 40 is arranged to avoid the exhaust port 10b, so that the gas can be discharged smoothly from the exhaust port 10b without being blocked.

[0054] In an optional embodiment, if Figure 1-Figure 3 As shown, to accommodate battery cells of varying sizes and thus expand the application range of the test device 1, the clamping member 41 is compressible along a first direction, which is the direction from the cavity 10a to the housing 10. Thus, the compression of the clamping member 41 can be adjusted according to the size of the battery cell to accommodate battery cells of varying sizes. The clamping member 41 can include a structural member having inherent elasticity, or a retractable member disposed between the structural member and the housing 10. For example, the retractable member can be an elastic member or a plurality of members that are movably connected to achieve extension and contraction.

[0055] In order to facilitate the compression of the clamping member 41 along the first direction, the clamping assembly 40 of the present application may further include a driving member 42 connected to the clamping member 41, and the driving member 42 is used to drive the clamping member 41 to compress along the first direction so as to press the clamping member 41 against the housing 10. The driving member 42 may be manually driven or electrically driven.

[0056] In an optional embodiment, if Figure 1-Figure 3As shown, in order to facilitate the compression of the clamping member 41 against the housing 10 along the first direction by the driving member 42, the clamping member 41 and the housing 10 can be respectively provided with a matching first mounting hole 41a and a second mounting hole 10c. For example, the first mounting hole 41a and the second mounting hole 10c are coaxially arranged, and the driving member 42 is sequentially passed through the second mounting hole 10c and the first mounting hole 41a and connected to the clamping member 41. In this way, by pulling the driving member 42 in a direction away from the cavity 10a, the clamping member 41 can be pressed against the housing 10.

[0057] It is understood that there can be one or more first mounting holes 41a and second mounting holes 10c, and the number of driving members 42 is the same as the number of first mounting holes 41a and second mounting holes 10c. Preferably, there is one first mounting hole 41a, one second mounting hole 10c, and one driving member 42, and the first mounting hole 41a is located at the geometric center of the clamping member 41 to facilitate the driving member 42 to pull the clamping member 41.

[0058] Exemplarily, the driving member 42 and the clamping member 41 can be fixedly connected, for example, by welding, threading, snap-fitting, or connecting via a connector. Preferably, the driving member 42 and the clamping member 41 are detachably connected. The driving member 42 and the clamping member 41 can also abut against each other. For example, a stopper is provided on one end of the driving member 42 facing the cavity 10a, and the stopper abuts against the clamping member 41 so that pulling the driving member 42 can drive the clamping member 41 to move.

[0059] In another embodiment, Figure 2 and Figure 3 As shown, in order to enable the clamping member 41 to be compressed along the first direction, the clamping member 41 in the present application may include a clamping body 411 and an elastic member 412, and the elastic member 412 is connected to the side of the clamping body 411 facing the housing 10. In this way, the compression of the clamping member 41 can be achieved by compressing the elastic member 412.

[0060] For example, the elastic member 412 may be a spring. There may be one spring or more than two springs. When there are two or more springs, they may be spaced apart on one side of the clamping body 411. Preferably, there are four springs, which are symmetrically arranged on opposite sides of the first mounting hole 41a.

[0061] The elastic member 412 may be connected to the clamping body 411, may be connected to the housing 10, or may be connected to both the clamping body 411 and the housing 10. Preferably, the elastic member 412 is connected to the clamping body 411. Specifically, the clamping body 411 is provided with an elastic mounting hole 4111 on a side facing the housing 10, and the elastic member 412 is mounted in the elastic mounting hole 4111. The elastic member 412 may be fixedly connected to the elastic mounting hole 4111. For example, the elastic member 412 may be welded, snap-fitted, or connected to the elastic mounting hole 4111 via a connector.

[0062] In another optional embodiment, in order to further increase the compressible length of the clamping member 41, the clamping body 411 in the present application is a compressible member. The compressibility of the clamping body 411 itself can increase the compressed length of the clamping member 41, further increasing the application range of the device. A pressing plate mounting hole 4131 is provided in the clamping body 411, and the driving member 42 is connected to the pressing plate mounting hole 4131. By pulling the pressing plate 413, the clamping body 411 and the elastic member 412 can be compressed. Along the first direction, the projection of the elastic member 412 on the housing 10 is located within the projection of the pressing plate 413 on the housing 10. In this way, the pressing plate 413 can provide a force to squeeze the elastic member 412, thereby facilitating the compression of the elastic member 412.

[0063] It is understood that, to facilitate compression of the elastic member 412, the pressing plate 413 is located on the side of the elastic member 412 facing the cavity 10a. Furthermore, to enable compression of the clamping body 411 by the pressing plate 413, the pressing plate 413 is located within the clamping body 411, near the side of the cavity 10a. To compress the clamping body 411 as a whole, the projection of the pressing plate 413 on the housing 10 can be located within, or overlap with, the projection of the clamping body 411 on the housing 10.

[0064] It should be noted that, in order to play a compression role, the pressing sheet 413 should be made of a hard material. For example, the pressing sheet 413 can be a metal sheet such as an iron sheet or a steel sheet.

[0065] Exemplarily, the driving member 42 and the pressing plate 413 can be fixedly connected, for example, the driving member 42 and the pressing plate 413 can be welded, threaded, snap-fitted, or connected via a connector. Preferably, the driving member 42 and the pressing plate 413 are threadedly connected. The driving member 42 and the pressing plate 413 can also abut against each other. For example, a limiting portion is provided on the end of the driving member 42 facing the cavity 10a, and the limiting portion abuts against the pressing plate 413 so that pulling the driving member 42 can drive the pressing plate 413 to move.

[0066] In an optional embodiment, if Figure 1 and Figure 2As shown, in order to facilitate triggering thermal runaway of the battery cell, the thermal runaway trigger 20 in this application is a heating plate, which has a simple structure and is easy to set up. The heating plate is attached to the side of the clamping member 41 facing the cavity 10a to improve the thermal runaway triggering efficiency.

[0067] Exemplarily, there may be two or more heating plates to improve the efficiency of triggering thermal runaway. Preferably, two heating plates are provided, one on each side of the battery cell. This allows for a uniform temperature distribution within the battery cell, prolongs the thermal runaway time, increases the amount of exhaust gas generated during thermal runaway, and thus reduces measurement errors.

[0068] It is understandable that the heating plate can be completely or partially in contact with the surface of the battery cell, and can be adjusted according to actual needs.

[0069] In another optional embodiment, Figure 2 As shown, in order to improve the stability of the heating plate, a groove 41b is provided on the side of the clamping member 41 facing the cavity 10a in the present application, and the heating plate is provided in the groove 41b.

[0070] For example, the shape of the groove 41b can match that of the heating plate so that the heating plate can be stably installed in the groove 41b. A movable limiting portion can also be provided in the groove 41b to facilitate the placement of the heating plate and to limit the position of the heating plate.

[0071] In an optional embodiment, if Figure 1 and Figure 2 As shown, in order to improve the thermal runaway triggering efficiency, under the premise of a certain number of heating plates, the contact area between the heating plates and the battery core is increased. The housing 10 of the present application has a first side surface 111 and a second side surface 112 (see Figure 4 ), the area of ​​the first side surface 111 is larger than the area of ​​the second side surface 112; one side of the clamping member 41 elastically presses against the first side surface 111. Since the heating plate is provided on the clamping member 41, the area of ​​the heating plate is conveniently increased.

[0072] For example, the housing 10 may be a cuboid, a cube, or a cylinder, etc. In the present application, the housing 10 is a cuboid, wherein the lengths of the first side 111 are respectively the length and height of the cuboid, and the lengths of the second side 112 are respectively the width and height of the cuboid.

[0073] In an optional embodiment, if Figure 1 and Figure 2As shown, in order to facilitate the placement of the battery cell into the housing 10, the housing 10 is provided with a limiting groove 10d in the present application. The limiting groove 10d is used to insert a limiting plate 60. When the clamping member 41 is at its maximum compression, the clamping member 41 avoids the limiting groove 10d so that the limiting plate 60 can be inserted into the limiting groove 10d. The limiting plate 60 limits the clamping member 41 so that the clamping member 41 can be kept in the maximum compression state. After the battery cell is placed in the housing 10, the limiting plate 60 can be pulled out. In this way, the clamping member 41 extends and presses against the battery cell. This facilitates the placement of the battery cell into the housing 10, especially when there are two or more clamping members 41. It can be operated by one person without the need for multiple people to cooperate.

[0074] Exemplarily, the limiting groove 10d can be provided on the second side 112, and corresponding limiting grooves 10d are provided on the two opposite sides. The limiting plate 60 can be inserted into the limiting groove 10d of one second side 112, and then inserted into the limiting groove 10d of the other second side 112 through the cavity 10a.

[0075] In another optional embodiment, Figure 1 and Figure 2 As shown, in order to facilitate the triggering of thermal runaway and prolong the thermal runaway time, thereby increasing the exhaust volume and improving the measurement accuracy, the test device 1 of the present application also includes at least one thermal insulation member 50, which is provided between the battery cell and the housing 10. In this way, the heat provided by the heating element can be concentrated in the cavity 10a to trigger the thermal runaway, while the heat is not easily dissipated, thereby improving the heating efficiency of the heating element and prolonging the thermal runaway time.

[0076] For example, there may be one or more thermal insulation members 50 , which can be positioned around the battery cell while avoiding the exhaust port 10b . In this embodiment, the clamping body 411 is constructed of insulating foam, which allows for expansion and contraction while also providing insulation. The second side 112 of the housing 10 is provided with side insulating foam, while the bottom 113 is provided with bottom insulating foam. The exhaust port 10b is located on the upper cover 12 .

[0077] In another optional embodiment, Figure 4 and Figure 5 As shown, in order to facilitate the placement of the battery cell, the housing 10 in this application includes a housing body 11 and an upper cover 12, and the housing body 11 is detachably connected to the upper cover 12. In this way, by disassembling the upper cover 12 from the housing body 11, it is convenient to place the battery cell into the cavity 10a.

[0078] For example, the shell body 11 and the upper cover 12 can be connected by snap fastening, connecting via a connector, etc. In the present application, the upper cover 12 is a flexible member. The shell body 11 is provided with a positioning groove 10e near the upper cover 12, and the upper cover 12 is provided with a positioning block 121. The positioning block 121 cooperates with the positioning groove 10e to connect the shell body 11 and the upper cover 12. The number of positioning grooves 10e and positioning blocks 121 is the same. In the present application, there are four positioning grooves 10e and positioning blocks 121, two of which are provided on one first side surface 111 of the shell body 11, and the other two are provided on the other first side surface 111 of the shell body 11.

[0079] In an optional embodiment, to further improve the accuracy of the measurement results, the exhaust pipe 31 in this application includes large inner diameter sections 311 at both ends and a small inner diameter section 312 in the middle, and the mass measuring member 32 is located in the small inner diameter section 312. By placing the mass measuring member 32 in the small inner diameter section 312, the accuracy of the exhaust volume measurement is improved.

[0080] For example, the exhaust pipe 31 gradually transitions from the large inner diameter section 311 to the small inner diameter section 312, and also gradually transitions from the small inner diameter section 312 to the large inner diameter section 311. The mass measuring member 32 is located at the position with the smallest inner diameter.

[0081] In yet another optional embodiment, to detect and analyze the gas components of battery thermal runaway, the testing device 1 further includes a gas collection assembly connected to the other end of the exhaust pipe 31. In this way, the gas generated by battery thermal runaway can be collected in the gas collection assembly, and the components of the gas in the gas collection assembly can be detected to obtain more information about the battery thermal runaway gas.

[0082] It is understandable that the gas collection assembly can be directly connected to the other end of the exhaust pipe 31 or connected through a pipeline.

[0083] The present application provides a battery thermal runaway exhaust test device 1. Considering the impact of the eruption pressure generated by the exhaust and the particulate matter generated by the exhaust on the weighing of the electronic scale in the process of measuring the exhaust volume of the battery thermal runaway by the mass loss method in the prior art, the accuracy of the battery thermal runaway exhaust volume measurement is low. The battery thermal runaway exhaust test device 1 provided in the present application includes a shell 10, a thermal runaway trigger 20 and an exhaust volume measurement assembly 30. When it is necessary to measure the exhaust volume of the battery thermal runaway, the battery cell is placed in the cavity 10a of the shell 10, and the thermal runaway trigger 20 provided in the cavity 10a triggers the battery cell to undergo thermal runaway and exhaust gas. The gas enters the exhaust port 10b of the shell 10 and is connected to the exhaust port 10b. Then, the mass measuring component 32 provided on the exhaust pipe 31 measures the amount of gas passing through the exhaust pipe 31. The measuring device provided in the present application will not be affected by the eruption pressure and particulate matter generated by the exhaust during the measurement process. The gas generated by the thermal runaway of the battery all enters the exhaust pipe 31 through the exhaust port 10b and is measured by the mass measuring part 32 on the exhaust pipe 31, and the measurement accuracy is high.

[0084] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this application is not limited to technical solutions formed by a specific combination of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the aforementioned disclosed concepts. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A battery thermal runaway exhaust test device, characterized in that: include: A housing having a cavity and an exhaust port, wherein the cavity is used to accommodate the battery cell; a thermal runaway triggering component, which is disposed in the cavity and is used to trigger thermal runaway of the battery cell; An exhaust volume measurement component includes an exhaust pipe and a mass measuring component. One end of the exhaust pipe is connected to the exhaust port. The mass measuring component is arranged on the pipeline of the exhaust pipe to measure the exhaust volume when the battery cell has thermal runaway.

2. The battery thermal runaway exhaust test device according to claim 1, characterized in that: It also includes a clamping assembly, wherein one side of the clamping member of the clamping assembly elastically presses against the inner side of the shell, and the other side of the clamping member elastically presses against the battery core, and the clamping assembly avoids the exhaust port.

3. The battery thermal runaway exhaust test device according to claim 2, characterized in that: The clamping assembly also includes a driving member connected to the clamping member, and the clamping member is compressible along a first direction, which is the direction from the cavity to the shell. The driving member is used to drive the clamping member to be compressed along the first direction to press the clamping member against the inner side of the shell.

4. The battery thermal runaway exhaust test device according to claim 3, characterized in that: The clamping member and the housing are respectively provided with a first mounting hole and a second mounting hole that match each other. The driving member is sequentially passed through the second mounting hole and the first mounting hole and is connected to the clamping member.

5. The battery thermal runaway exhaust test device according to claim 3, characterized in that: The clamping member includes a clamping body and an elastic member, and the elastic member is connected to a side of the clamping body facing the housing.

6. The battery thermal runaway exhaust test device according to claim 5, characterized in that: The clamping body is a compressible part. A pressing plate is provided in the clamping body. Along the first direction, the projection of the elastic part on the shell is located within the projection of the pressing plate on the shell. The driving part is connected to the pressing plate.

7. The battery thermal runaway exhaust test device according to claim 3, characterized in that: The thermal runaway triggering component is a heating plate, and the heating plate is in contact with a side of the clamping component facing the cavity.

8. The battery thermal runaway exhaust test device according to claim 3, characterized in that: The housing has a first side surface and a second side surface, wherein the area of ​​the first side surface is greater than the area of ​​the second side surface; One side of the clamping member elastically presses against the first side surface.

9. The battery thermal runaway exhaust test device according to claim 3, characterized in that: The shell is provided with a limiting groove, and the limiting groove is used to insert a limiting plate. When the clamping member is at the maximum compression amount, the clamping member avoids the limiting groove, and the limiting plate is inserted in the limiting groove to limit the clamping member.

10. The battery thermal runaway exhaust test device according to any one of claims 1 to 9, characterized in that: The exhaust pipe includes a large inner diameter section at both ends and a small inner diameter section in the middle, and the mass measuring component is arranged in the small inner diameter section.

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