Fixing device and testing system

Abstract

The embodiment of the utility model relates to the field of battery testing, and discloses a fixing device and a testing system.The fixing device is used for an extrusion test of a battery monomer, the battery monomer comprises a first wall and a second wall which are oppositely arranged, the fixing device comprises a fixing plate and a clamping mechanism, and the clamping mechanism is connected to the fixing plate; one side, facing the battery monomer, of the fixing plate is attached to the first wall, the clamping mechanism clamps the battery monomer, and at least part of the second wall is not covered by the fixing device, so that the test efficiency of the battery monomer can be improved.

Description

Technical Field

[0001] This application relates to the field of battery testing, and more specifically, to a fixture and testing system. Background Technology

[0002] Conventional battery cell compression testing methods place the battery cells on a compression platform and use compression components to perform the compression test. During the test, it is difficult to transfer the battery cells and difficult to clean up the waste battery cells.

[0003] Therefore, how to improve the testing efficiency of individual battery cells has become an urgent problem to be solved. Utility Model Content

[0004] This application provides a fixing device and a testing system that can improve the testing efficiency of individual battery cells.

[0005] In a first aspect, a fixing device is provided for a compression test of a battery cell. The battery cell includes a first wall and a second wall disposed opposite to each other. The fixing device includes a fixing plate and a clamping mechanism. The clamping mechanism is connected to the fixing plate. The fixing plate is attached to the first wall on the side facing the battery cell. The clamping mechanism clamps the battery cell. At least a portion of the second wall is not covered by the fixing device.

[0006] In the technical solution provided in this application embodiment, the clamping mechanism of the fixing device clamps the battery cell, the first wall of the battery cell is attached to the fixing plate, and the second wall is at least partially exposed so that the extruder can extrude the battery cell. After the extrusion test, the battery cell remains are still fixed by the fixing device, thereby enabling the battery cell or battery cell remains to be transferred together by transferring the fixing device during the test process. This reduces the time for the operating device to move and clamp the battery cell and the time for cleaning the battery cell remains, thus improving the test efficiency.

[0007] In some embodiments, the second wall is the wall with the largest surface area of ​​the battery cell, and the clamping mechanism includes: a clamping plate that fits against the second wall; and a connecting portion that connects the clamping plate and the fixing plate so that the clamping plate and the fixing plate cooperate to clamp the battery cell.

[0008] In the technical solution provided in this application embodiment, the fixing device clamps the wall with the largest surface area of ​​the battery cell, thereby enabling a compression test on the wall with the largest surface area of ​​the battery cell. This clamping method has high clamping stability and good anti-drop performance.

[0009] In some embodiments, the clamping plate includes a first clamping part and a second clamping part, the first clamping part and the second clamping part being spaced apart along a first direction such that at least a portion of the second wall is not covered by the fixing device, wherein the first direction is perpendicular to the thickness direction of the clamping plate.

[0010] In the technical solution provided in this application embodiment, the clamping plate provides an exposed area through a first clamping sub-part and a second clamping sub-part that are spaced apart, so that the extruded part can be subjected to extrusion testing through the exposed area.

[0011] In some embodiments, the connecting portion includes a first adjusting portion, which is configured to adjust the distance between the fixing plate and the clamping plate.

[0012] In the technical solution provided in this application embodiment, by adjusting the battery cell of different thicknesses, it is possible to clamp various types of battery cells, thereby improving the clamping strength and further improving the testing efficiency.

[0013] In some embodiments, the connecting part includes a connecting post, one end of which is fixedly connected to the fixing plate; the adjusting part includes a threaded hole and a bolt; the clamping plate includes a first through hole, the threaded hole is disposed at the other end of the connecting post and the opening of the threaded hole is opposite to the first through hole; wherein, the bolt passes through the first through hole to cooperate with the threaded hole to adjust the distance between the fixing plate and the clamping plate.

[0014] In some embodiments, the fixing plate is provided with a first notch on each of its two sides along the first direction, and the pressing plate is provided with a second notch on each of its two sides along the first direction, wherein the first direction is perpendicular to the thickness direction of the pressing plate, and the first notch and the second notch are arranged opposite to each other along the thickness direction of the pressing plate.

[0015] In the technical solution provided in this application embodiment, the fixing plate is provided with a first notch on both sides of the first direction, and the pressing plate is provided with a second notch on both sides of the first direction. The first notch and the second notch are arranged opposite to each other along the thickness direction of the pressing plate. When the operating device moves the fixing device, it can bear the weight through the oppositely arranged first notch and second notch, which improves the anti-fall performance during handling and improves the testing efficiency.

[0016] In some embodiments, the fixing plate further includes a first protrusion structure that protrudes toward the pressing plate and is disposed on one side of the first notch along a second direction, wherein the second direction is perpendicular to the first direction and the thickness direction of the fixing plate; the pressing plate further includes a second protrusion structure that protrudes toward the fixing plate and is disposed on one side of the second notch along a second direction.

[0017] In the technical solution provided in this application embodiment, the fixing plate is further provided with a first protrusion structure, and the pressing plate is provided with a second protrusion structure. The first protrusion structure and the second protrusion structure are arranged opposite to each other along the thickness direction of the pressing plate, thereby increasing the load-bearing area, reducing the pressure caused by the weight of the fixing device on the fixing plate or the pressing plate, and improving the service life of the fixing device.

[0018] In some embodiments, the battery cell includes two third walls disposed opposite to each other, the two third walls being the walls with the largest surface area of ​​the battery cell, and the surface area of ​​the second wall being smaller than that of the third wall. The clamping mechanism includes: a connecting plate, the connecting plate being fixedly connected to a fixed plate; a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate being fixedly connected to the connecting plate, the first clamping plate and the second clamping plate being disposed opposite to each other and respectively abutting against the two third walls.

[0019] In the technical solution provided in this application embodiment, the clamping mechanism of the fixing device clamps the battery cell, the first wall of the battery cell is attached to the fixing plate, and the second wall is not provided with a shielding component so that the extruder can extrude the battery cell. After the extrusion test, the battery cell remains are still fixed by the fixing device, thereby realizing that the battery cell or battery cell remains can be transferred together by transferring the fixing device during the test process, reducing the time for the operating device to move and clamp the battery cell and the time for cleaning the battery cell remains, thus improving the test efficiency.

[0020] In some embodiments, the connecting plate includes two connecting sub-plates, at least one of which is provided with a second adjustment portion, wherein at least one connecting sub-plate is fixedly connected to the fixing plate through the second adjustment portion to adjust the distance between the two connecting sub-plates.

[0021] In the technical solution provided in this application embodiment, the second adjustment part is adapted to battery cells of different thicknesses, which can clamp various types of battery cells, improve the clamping strength, and further improve the testing efficiency.

[0022] In some embodiments, the second adjustment part includes a fixing mechanism and a second through hole disposed on the connecting plate. The fixing mechanism passes through the second through hole to fix the connecting plate to the fixing plate. The second through hole extends along a third direction, which is perpendicular to the third wall.

[0023] In some embodiments, a first rib is provided between the connecting plate and the first clamping plate, and a second rib is provided between the connecting plate and the second clamping plate. The first rib connects the side of the connecting plate away from the fixing plate and the side of the first clamping plate away from the battery cell, and the second rib connects the side of the connecting plate away from the fixing plate and the side of the second clamping plate away from the battery cell.

[0024] In the technical solution provided in this application embodiment, a first rib is provided between the connecting plate and the first clamping plate, and a second rib is provided between the connecting plate and the second clamping plate, thereby improving the stability of the two clamping plates clamping the battery cell and improving the anti-drop performance during the handling and fixing process.

[0025] In some embodiments, the first clamping plate is provided with a first groove, and the second clamping plate is provided with a second groove, wherein the first groove and the second groove are disposed opposite to each other along the thickness direction of the first clamping plate.

[0026] In the technical solution provided in this application embodiment, when handling the fixing device, the operating device can bear part of the weight of the fixing device through the first groove and the second groove, making it more stable during handling and improving the anti-fall performance during handling.

[0027] In some embodiments, the fixing device further includes: a data acquisition module electrically connected to a battery cell; a housing having a receiving cavity in which the data acquisition module is housed; wherein, a fixing plate is fixedly connected to the housing.

[0028] In the technical solution provided in this application embodiment, a data acquisition module is set in the fixing device. The data acquisition module is electrically connected to the battery cell, thereby enabling the acquisition of changes in parameters such as temperature and voltage of the battery cell throughout the extrusion test. This reduces the complexity of setting up additional detection mechanisms and the time spent connecting the battery cell during the test, thus improving the efficiency of the extrusion test.

[0029] In some embodiments, the housing includes a first wall with a third through hole, wherein the acquisition module is electrically connected to the battery cell via an acquisition line that passes through the third through hole.

[0030] In the technical solution provided in this application embodiment, by providing a third through hole in the first wall of the housing, the acquisition module can be electrically connected to the battery cell. At the same time, the through hole reduces the exposure of the acquisition module and can protect the acquisition module.

[0031] In some embodiments, the fixing device further includes: a heat insulation layer covering the side of the first wall facing the acquisition module and the side of the fixing plate facing the acquisition module.

[0032] In the technical solution provided in this application embodiment, a heat insulation layer is covered on the side of the first wall facing the acquisition module and the side of the fixing plate facing the acquisition module. During the extrusion test, the temperature of the battery cell rises, and the heat insulation layer can effectively reduce the heat transfer from the battery cell to the acquisition module, thus protecting the acquisition module.

[0033] Secondly, a testing system is provided for extrusion testing of a battery cell. The battery cell includes a first wall and a second wall disposed opposite to each other. The testing system includes a fixing plate and a clamping mechanism. The fixing plate is attached to the first wall on the side facing the battery cell. The clamping mechanism clamps the battery cell and is detachably connected to the fixing plate so that the fixing plate is detachably connected to one of two different clamping mechanisms. The two different clamping mechanisms are used for extrusion testing of the wall with the largest surface area of ​​the battery cell and extrusion testing of the walls other than the wall with the largest surface area of ​​the battery cell, respectively. At least a portion of the second wall is not covered by the clamping mechanism.

[0034] In the technical solution provided in this application embodiment, the two sets of clamping mechanisms of the testing system are detachably connected to the fixing plate, thereby adapting to different battery cell types and compression testing methods, and improving testing efficiency.

[0035] In some embodiments, the second wall is the wall with the largest surface area of ​​the battery cell, and the clamping mechanism includes: a clamping plate that fits against the second wall; and a connecting portion that connects the clamping plate and the fixing plate so that the clamping plate and the fixing plate cooperate to clamp the battery cell.

[0036] In some embodiments, the surface area of ​​the second wall is smaller than the two walls with the largest surface areas of the battery cell. The second clamping mechanism includes: a connecting plate, which is fixedly connected to a fixed plate; a first clamping plate and a second clamping plate, which are fixedly connected to the connecting plate. The first clamping plate and the second clamping plate are arranged opposite to each other and respectively fit against the two walls with the largest surface areas of the battery cell.

[0037] In the technical solution provided in this application embodiment, the two clamping mechanisms of the test system correspond to the clamping mechanisms with the front of the battery cell as the test surface and the side of the battery cell as the test surface, respectively. In this way, the test efficiency is improved by adapting to different battery cell test methods through detachable connection with the fixing plate. Attached Figure Description

[0038] Figure 1 A perspective view of a battery cell according to an embodiment of this application is shown;

[0039] Figure 2 A perspective view of a fixing device provided in a certain embodiment of this application is shown;

[0040] Figure 3 An exploded view of a fixing device provided in one embodiment of this application is shown;

[0041] Figure 4 This paper shows a possible front view of the fixing plate in a fixing device provided in one embodiment of the present application;

[0042] Figure 5 This application shows another possible front view of the fixing plate in a fixing device provided in one embodiment;

[0043] Figure 6 This paper shows a possible front view of the clamping plate in a fixing device provided in one embodiment of the present application;

[0044] Figure 7 This application shows another possible front view of the clamping plate in a fixing device according to a certain embodiment;

[0045] Figure 8 A perspective view of a fixing device provided in a certain embodiment of this application is shown;

[0046] Figure 9 An exploded view of a fixing device provided in one embodiment of this application is shown;

[0047] Figure 10 A perspective view of a fixing device provided in a certain embodiment of this application is shown;

[0048] Figure 11 An exploded view of a fixing device provided in one embodiment of this application is shown;

[0049] Figure 12 A schematic diagram of a possible connecting plate in the fixing device provided in an embodiment of this application is shown;

[0050] Figure 13 A schematic diagram of the first clamping plate in a fixing device provided in a certain embodiment of this application is shown;

[0051] Figure 14 A schematic diagram showing the transfer of a fixing device provided in a certain embodiment of this application by an operating device is shown;

[0052] Figure label:

[0053] 1-Fixing device; 11-Fixing plate; 12-Clamping mechanism; 13-Housing shell; 14-Connecting plate; 20-Battery cell; 21-First wall; 22-Second wall; 23-Third wall; 31-Operating device; 111-First notch; 112-First protruding structure; 115-Connecting hole; 121-Pressure plate; 122-Connecting part; 123-First adjusting part; 213-Pressure relief mechanism; 214-Electrode terminal; 214a-First electrode terminal; 214b-Second electrode terminal Extreme part; 215-Injection hole; 131-Third through hole; 132-Collection module; 141-Second adjustment part; 151-First clamping plate; 152-Second clamping plate; 161-First rib; 162-Second rib; 1211-First clamping part; 1212-Second clamping part; 1213-Second notch; 1214-Second protrusion structure; 1215-First through hole; 1411-Second through hole; 1511-First groove; 1521-Second groove;

[0054] The accompanying drawings are not drawn to scale. Detailed Implementation

[0055] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0056] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0058] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0061] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0062] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0063] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0064] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0065] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0066] The battery cells in this application embodiment can be used in electrical devices, energy storage devices, etc., and this application embodiment does not limit them.

[0067] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0068] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0069] Safety tests are typically performed on the produced battery cells, such as crush tests and puncture tests.

[0070] Conventional battery cell compression testing methods place the battery cells on a compression platform and use compression components to perform the compression test. During the test, it is difficult to transfer the battery cells and difficult to clean up the waste battery cells.

[0071] Therefore, how to improve the testing efficiency of individual battery cells has become an urgent problem to be solved.

[0072] This application provides a fixing device for a compression test of a battery cell. The battery cell includes a first wall and a second wall disposed opposite to each other. The fixing device includes a fixing plate and a clamping mechanism. The clamping mechanism is connected to the fixing plate. The fixing plate is attached to the first wall on the side facing the battery cell. The clamping mechanism clamps the battery cell. At least a portion of the second wall is not covered by the fixing device.

[0073] In the technical solution provided in this application embodiment, the clamping mechanism of the fixing device clamps the battery cell, the first wall of the battery cell is attached to the fixing plate, and the second wall is at least partially exposed so that the extruder can extrude the battery cell. After the extrusion test, the battery cell remains are still fixed by the fixing device, thereby enabling the battery cell or battery cell remains to be transferred together by transferring the fixing device during the test process. This reduces the time for the operating device to move and clamp the battery cell and the time for cleaning the battery cell remains, thus improving the test efficiency.

[0074] Combination Figure 1 Examples of battery cells 20 that may be applicable to the fixing device 1 provided in the embodiments of this application are given, but this application is not limited thereto.

[0075] Figure 1 A perspective view of a battery cell 20 according to an embodiment of this application is shown.

[0076] like Figure 1 As shown, a battery cell 20 according to some embodiments of this application may include a first wall 21 and a second wall 22 disposed opposite to each other.

[0077] The first wall 21 and the second wall 22 can be the wall with the largest surface area of ​​the battery cell 20, or they can be other walls, such as side walls.

[0078] In addition to the first wall 21 and the second wall 22, the battery cell 20 may include other walls, which are not limited in this embodiment.

[0079] The battery cell 20 can be in various shapes, such as a cube or a cuboid.

[0080] The battery cell 20 may also include other components, such as electrode terminals 214, pressure relief mechanism 213, liquid injection hole 215, etc.

[0081] The electrode terminals 214 can output electrical energy. Each battery cell 20 can have at least two electrode terminals 214, each including at least one first electrode terminal 214a and at least one second electrode terminal 214b, wherein the first electrode terminal 214a and the second electrode terminal 214b have opposite polarities. For example, the first electrode terminal 214a can be a positive electrode terminal 214, and the second electrode terminal 214b can be a negative electrode terminal 214; or, the first electrode terminal 214a can be a negative electrode terminal 214, and the second electrode terminal 214b can be a positive electrode terminal 214.

[0082] The pressure relief mechanism 213 can release the pressure inside the battery cell 20. As an example, it is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold.

[0083] Electrolyte can be injected into the battery cell 20 through the injection hole 215, and then the battery cell 20 can be sealed by the sealing element.

[0084] The battery cell 20 may also include fewer or more components, and this application embodiment does not limit this.

[0085] The following is combined Figure 2 and Figure 3 This application describes a fixing device 1 provided in one embodiment.

[0086] See also Figure 2 and Figure 3 ,in, Figure 2 A perspective view of a fixing device 1 provided in a certain embodiment of this application is shown; Figure 3 An exploded view of a fixing device 1 provided in a certain embodiment of this application is shown.

[0087] In some possible embodiments, the fixing device 1 may include a fixing plate 11 and a clamping mechanism 12 connected to the fixing plate 11. The fixing plate 11 is attached to the first wall 21 on the side facing the battery cell 20, and the clamping mechanism 12 clamps the battery cell 20. At least a portion of the second wall 22 is not covered by the fixing device 1.

[0088] The battery cell 20 can be fixed in the fixing device 1 before the extrusion test. The operating device 31 can move the battery cell 20 to the test platform by moving the fixing device 1 for testing.

[0089] The fixing plate 11 is attached to the first wall 21 on the side facing the battery cell 20, and the second wall 22 is exposed to the fixing device 1. Therefore, when performing a compression test, the extruder can compress the battery cell 20 by compressing the exposed area of ​​the second wall 22.

[0090] By clamping the battery cell 20, a large-area contact with the battery cell 20 can be achieved. Even if the battery cell 20 is damaged during testing, the clamping mechanism 12 still has a high probability of holding and fixing the battery cell 20. After the test, the operating device 31 can directly transfer the fixing device 1 without having to clean up the debris of the battery cell 20 before subsequent testing. The operating device 31 can be a robotic arm, an automated handling robot, etc., and this embodiment of the application does not limit it to this.

[0091] Figure 2 and Figure 3 An example is given in the example of clamping mechanism 12 cooperating with fixed plate 11 to clamp battery cell 20, but this application is not limited thereto, and clamping mechanism 12 can also clamp battery cell 20 independently.

[0092] The figure exemplarily shows that notches and protrusions are provided on the side edge of the fixing plate 11 to facilitate the handling of the operating device 31. However, the side edge of the fixing plate 11 may not be provided with notches or protrusions. The operating device 31 can support the regularly shaped part of the fixing device 1 or the area that is easier to bear weight in order to carry out the handling of the fixing device 1 and the battery cell 20.

[0093] The figure exemplifies that the first wall 21 and the second wall 22 are the walls with the largest surface area of ​​the battery cell 20, but the first wall 21 can also be other walls of the battery cell 20, such as side walls, and the embodiments of this application are not limited thereto.

[0094] In the technical solution provided in this application embodiment, the clamping mechanism 12 of the fixing device 1 clamps the battery cell 20. The first wall 21 of the battery cell 20 is attached to the fixing plate 11, and the second wall 22 is at least partially exposed so that the extruder can extrude the battery cell 20. After the extrusion test, the remains of the battery cell 20 are still fixed by the fixing device 1. Thus, the battery cell 20 or the remains of the battery cell 20 can be transferred together by transferring the fixing device 1 during the test process. This reduces the time for the operating device 31 to move and clamp the battery cell 20 and the time to clean the remains of the battery cell 20, thereby improving the test efficiency.

[0095] In some possible embodiments, the second wall 22 is the wall with the largest surface area of ​​the battery cell 20, and the clamping mechanism 12 includes a clamping plate 121 that fits against the second wall 22; and a connecting part 122 that connects the clamping plate 121 and the fixing plate 11 so that the clamping plate 121 and the fixing plate 11 cooperate to clamp the battery cell 20.

[0096] The figure shows the connecting part 122 as a cylinder, but this embodiment is not limited to this. The connecting part 122 can also be other shapes, such as a cube, a hexagonal prism, etc.

[0097] The figure exemplarily shows that the connecting part 122 and the pressing plate 121 are connected by threads to press the battery cell 20. However, the embodiments of this application are not limited thereto. The connecting part 122 and the pressing plate 121 can be connected in other ways, such as slot connection, snap-on connection, etc.

[0098] The fixing plate 11 may be provided with a connection hole 115, which is used to connect to the connecting part 122. The connection hole 115 may also be connected to other components, such as the housing of the acquisition module.

[0099] The fixing plate 11 is attached to the first wall 21, and the clamping plate 121 is attached to the second wall 22. With the first wall 21 and the second wall 22 being the walls with the largest surface area of ​​the battery cell 20, the clamping stability is high and the anti-drop performance is good. At the same time, with this clamping method, the wall with the largest surface area is not covered by the fixing device 1, so that the front of the battery cell 20, that is, the surface with the largest surface area, can be subjected to compression testing.

[0100] In the technical solution provided in this application embodiment, the fixing device 1 clamps the wall with the largest surface area of ​​the battery cell 20, thereby enabling a compression test on the wall with the largest surface area of ​​the battery cell 20. This clamping method has high clamping stability and good anti-drop performance.

[0101] The number of connecting parts 122 and the connection positions of the connecting parts 122 with the fixing plate 11 and the clamping plate 121 in this application embodiment can be implemented in various ways, for example, Figure 4 and Figure 5 As shown, Figure 4 This paper shows a possible front view of the fixing plate 11 in the fixing device 1 provided in a certain embodiment of the present application. Figure 4 The number of connecting parts 122 can be eight, and the connecting parts 122 can be distributed within the range of the four corners of the fixing plate 11. Figure 5 This paper shows another possible front view of the fixing plate 11 in the fixing device 1 provided in a certain embodiment of the present application. Figure 5 The number of connecting parts 122 can be 10, and the connecting parts 122 can be distributed on the edge of the fixing plate 11. The number of connecting parts 122 and the connection positions of the connecting parts 122 with the fixing plate 11 and the clamping plate 121 can also be implemented in other ways, and the embodiments of this application are not limited thereto.

[0102] The figure exemplarily shows that the clamping plate 121 is composed of multiple sub-plates, but the clamping plate 121 can also be implemented in other ways, for example, such as Figure 6 and Figure 7 As shown, Figure 6 This paper shows a possible front view of the clamping plate 121 in the fixing device 1 provided in a certain embodiment of the present application. Figure 6 In the middle, the clamping plate 121 is a whole, and an opening area is provided in the middle of the clamping plate 121 to expose the second wall 22 under the clamping plate 121 for compression testing.

[0103] Figure 7 This application shows another possible front view of the clamping plate 121 in a fixing device 1 according to a certain embodiment of the present application. In some possible embodiments, such as... Figure 7 As shown, the clamping plate 121 includes a first clamping sub-part 1211 and a second clamping sub-part 1212. The first clamping sub-part 1211 and the second clamping sub-part 1212 are spaced apart along a first direction so that at least a portion of the second wall 22 is not covered by the fixing device 1, wherein the first direction is perpendicular to the thickness direction of the clamping plate 121.

[0104] In this embodiment of the application, the number of the first pressing part 1211 is one and the number of the second pressing part 1212 is two. However, the number of the first pressing part 1211 and the second pressing part 1212 can also be other values, and this embodiment of the application does not limit this.

[0105] The first clamping sub-parts 1211 and the second clamping sub-parts 1212 can also be spaced apart, and the embodiments of this application are not limited thereto.

[0106] In the technical solution provided in this application embodiment, the clamping plate 121 provides an exposed area through the first clamping sub-part 1211 and the second clamping sub-part 1212 which are spaced apart, so that the extruded part can be subjected to extrusion test through the exposed area.

[0107] In some possible embodiments, the connecting portion 122 includes a first adjusting portion 123, which is configured to adjust the distance between the fixing plate 11 and the pressing plate 121.

[0108] The first adjustment part 123 can be implemented in various ways. For example, in some possible embodiments, the connecting part 122 includes a connecting post, one end of which is fixedly connected to the fixing plate 11; the first adjustment part 123 includes a threaded hole and a bolt, and the clamping plate 121 includes a first through hole 1215. The threaded hole is disposed at the other end of the connecting post and the opening of the threaded hole is opposite to the first through hole 1215; wherein, the bolt passes through the first through hole 1215 to cooperate with the threaded hole to adjust the distance between the fixing plate 11 and the clamping plate 121.

[0109] By using the threaded hole and bolt, when installing the battery cell 20, tightening or loosening the bolt allows the bolt length to be adapted to battery cells 20 of different thicknesses, enabling clamping of various models of battery cells 20, improving clamping strength, facilitating operation, and further improving testing efficiency.

[0110] The first adjustment part 123 can be implemented in other ways. For example, the first adjustment part 123 may include a snap-fit ​​component and a plurality of slots disposed on the connecting part 122 along the thickness direction of the pressing plate 121. The distance between the fixing plate 11 and the pressing plate 121 can be adjusted by the cooperation of the snap-fit ​​component and the plurality of slots. The embodiments of this application are not limited thereto.

[0111] In the technical solution provided in this application embodiment, by adjusting the battery cell 20 of different thicknesses, it is possible to clamp various types of battery cells 20, thereby improving the clamping strength and further improving the testing efficiency.

[0112] In some possible embodiments, the fixing plate 11 is provided with two first notches 111 opposite each other along a first direction, and the two first notches 111 are respectively provided on both sides of the fixing plate 11 along the first direction. The pressing plate 121 is provided with two second notches 1213 opposite each other along the first direction, and the two second notches 1213 are respectively provided on both sides of the pressing plate 121 along the first direction. The first direction is perpendicular to the thickness direction of the pressing plate 121, and the first notches 111 and the second notches 1213 are provided opposite each other along the thickness direction of the pressing plate 121.

[0113] In the technical solution provided in this application embodiment, the fixing plate 11 is provided with a first notch 111 on both sides of the first direction, and the pressing plate 121 is provided with a second notch 1213 on both sides of the first direction. The first notch 111 and the second notch 1213 are arranged opposite to each other along the thickness direction of the pressing plate 121. When the operating device 31 is transporting the fixing device 1, it can bear the weight through the oppositely arranged first notch 111 and second notch 1213, which improves the anti-fall performance during transport and improves the testing efficiency.

[0114] In some possible embodiments, the fixing plate 11 further includes a first protrusion structure 112 protruding toward the pressing plate 121. The first protrusion structure 112 is disposed on one side of the first notch 111 along a second direction, wherein the second direction is perpendicular to the first direction and the thickness direction of the fixing plate 11; the connecting plate 14 further includes a second protrusion structure 1214 protruding toward the fixing plate 11. The second protrusion structure 1214 is disposed on one side of the second notch 1213 along a second direction.

[0115] In the technical solution provided in this application embodiment, the fixing plate 11 is further provided with a first protrusion structure 112, and the pressing plate 121 is provided with a second protrusion structure 1214. The first protrusion structure 112 and the second protrusion structure are arranged opposite to each other along the thickness direction of the pressing plate 121, thereby increasing the load-bearing area, reducing the pressure caused by the weight of the fixing device 1 on the fixing plate 11 or the pressing plate 121, and improving the service life of the fixing device 1.

[0116] The following is combined Figure 8 and Figure 9 This application describes a fixing device 1 provided in one embodiment.

[0117] in, Figure 8 A perspective view of a fixing device 1 provided in a certain embodiment of this application is shown; Figure 9 An exploded view of a fixing device 1 provided in a certain embodiment of this application is shown.

[0118] See also Figure 8 and Figure 9 In some possible embodiments, the fixing device 1 further includes a data acquisition module 132, which is electrically connected to the battery cell 20; a housing 13, which has a receiving cavity in which the data acquisition module 132 is received; wherein, the fixing plate 11 is fixedly connected to the housing 13.

[0119] The acquisition module 132 may include a processor, which may be coupled to a memory for storing computer programs or instructions and / or data. The processor is used to execute the computer programs or instructions stored in the memory, or to read the data stored in the memory, in order to acquire data during the extrusion test of the battery cell 20, such as temperature and voltage data.

[0120] It should be understood that the processor mentioned in the embodiments of this application can be a central processing unit, or it can be other general-purpose processors, digital signal processors, application-specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0121] In the technical solution provided in this application embodiment, a data acquisition module 132 is provided in the fixing device 1. The data acquisition module 132 is electrically connected to the battery cell 20, so that the changes in parameters such as temperature and voltage of the battery cell 20 can be acquired throughout the extrusion test. This reduces the complexity of setting up additional detection mechanisms and reduces the time spent connecting the battery cell 20 during the test, thereby improving the efficiency of the extrusion test.

[0122] In some possible embodiments, the housing 13 includes a first wall 21, the first wall 21 being provided with a third through hole 131, wherein the acquisition module 132 is electrically connected to the battery cell 20 via an acquisition line, the acquisition line passing through the third through hole 131.

[0123] The shape of the third through hole 131 can be implemented in various ways, such as a round hole or an elliptical hole, and the embodiments of this application do not limit this.

[0124] In the technical solution provided in this application embodiment, by providing a third through hole 131 in the first wall 21 of the housing 13, the acquisition module 132 can be electrically connected to the battery cell 20. At the same time, the through hole reduces the exposure of the acquisition module 132 and can protect the acquisition module 132.

[0125] In some possible embodiments, the fixing device 1 further includes a heat insulation layer covering the side of the first wall 21 facing the acquisition module 132 and the side of the fixing plate 11 facing the acquisition module 132.

[0126] The heat insulation layer can reduce the risk of damage to the acquisition module 132 caused by the thermal reaction of the battery cell 20 during the test.

[0127] For example, the insulation layer can withstand a high temperature of 1260°C, but this application does not limit it.

[0128] For example, the insulation layer may be aluminum silicate ceramic fiber paper, but this application is not limited to this, and the insulation layer may be other insulation materials.

[0129] In the technical solution provided in this application embodiment, a heat insulation layer is covered on the side of the first wall 21 facing the acquisition module 132 and the side of the fixing plate 11 facing the acquisition module 132. During the extrusion test, the temperature of the battery cell 20 rises, and the heat insulation layer can effectively reduce the heat transfer from the battery cell 20 to the acquisition module 132, thus protecting the acquisition module 132.

[0130] The following is combined Figure 10 and Figure 11 This application describes a fixing device 1 provided in one embodiment.

[0131] See also Figure 10 and Figure 11 ,in, Figure 10 A perspective view of a fixing device 1 provided in a certain embodiment of this application is shown; Figure 11 An exploded view of a fixing device 1 provided in a certain embodiment of this application is shown.

[0132] In some possible embodiments, the battery cell 20 includes two third walls 23 disposed opposite to each other, the two third walls 23 being the walls with the largest surface area of ​​the battery cell 20, the surface area of ​​the second wall 22 being smaller than that of the third wall 23, the clamping mechanism 12 including a connecting plate 14, the connecting plate 14 being fixedly connected to the fixing plate 11; a first clamping plate 151 and a second clamping plate 152, the first clamping plate 151 and the second clamping plate 152 being fixedly connected to the connecting plate 14, the first clamping plate 151 and the second clamping plate 152 being disposed opposite to each other and respectively abutting against the two third walls 23.

[0133] The first wall 21 and the second wall 22 are the walls of the battery cell 20 other than the wall with the largest surface area. The battery cell 20 can be fixed in the fixing device 1 before the extrusion test. The operating device 31 can transport the battery cell 20 to the test platform by transporting the fixing device 1 so as to carry out the extrusion test of the other walls.

[0134] The fixing plate 11 is attached to the first wall 21 on the side facing the battery cell 20, and the second wall 22 is not shielded, so the exposed area of ​​the second wall 22 is the largest. Therefore, when the extrusion test is carried out, the extruder can effectively extrude the battery cell 20 by extruding the second wall 22.

[0135] By clamping the battery cell 20 to hold the wall with the largest surface area, the clamping mechanism 12 can achieve the largest possible contact area with the battery cell 20. Even if the battery cell 20 is damaged during testing, the clamping mechanism 12 still has a high probability of holding and fixing the battery cell 20. After the test, the operating device 31 can directly transfer the fixing device 1 without having to clean up the debris of the battery cell 20 before conducting subsequent tests.

[0136] The figure shows an example of a connecting plate 14 consisting of two sub-plates, but the embodiments of this application are not limited thereto, and the connecting plate 14 may also be a single plate.

[0137] The figure exemplifies an example in which grooves are provided in the first clamping plate 151 and the second clamping plate 152 to facilitate the handling by the operating device 31. However, the embodiments of this application are not limited thereto. The first clamping plate 151 and the second clamping plate 152 may not be provided with grooves. The operating device 31 can weigh the fixing device 1 through other parts of the fixing device 1, thereby handling the fixing device 1 and the battery cell 20 for compression testing.

[0138] The figure exemplarily shows the first wall 21 and the second wall 22 as side walls of the battery cell 20, but the first wall 21 can also be other walls of the battery cell 20, such as the top wall and the bottom wall, and the embodiments of this application are not limited thereto.

[0139] In the technical solution provided in this application embodiment, the clamping mechanism 12 of the fixing device 1 clamps the battery cell 20. The first wall 21 of the battery cell 20 is attached to the fixing plate 11, and the second wall 22 is not provided with a shielding component so that the extruder can extrude the battery cell 20. After the extrusion test, the remains of the battery cell 20 are still fixed by the fixing device 1. Thus, the battery cell 20 or the remains of the battery cell 20 can be transferred together by transferring the fixing device 1 during the test process. This reduces the time for the operating device 31 to move and clamp the battery cell 20 and the time to clean the remains of the battery cell 20, thereby improving the test efficiency.

[0140] In some possible embodiments, the connecting plate 14 includes two connecting sub-plates, and the connecting plate 14 is provided with a second adjustment part 141, wherein the connecting plate 14 is fixedly connected to the fixing plate 11 through the second adjustment part 141 to adjust the distance between the two connecting sub-plates.

[0141] The second adjustment unit 141 can be implemented in various ways, for example, Figure 12 A schematic diagram of a possible connecting plate 14 in the fixing device 1 provided in an embodiment of this application is shown. Figure 12 As shown, in some possible embodiments, the second adjustment part 141 includes a fixing mechanism and a second through hole 1411 disposed on the connecting plate 14. The fixing mechanism passes through the second through hole 1411 to fix the connecting plate 14 to the fixing plate 11. The second through hole 1411 extends along a third direction, which is perpendicular to the third wall 23.

[0142] By cooperating with the fixing mechanism through the through hole extending along the third direction, the fixing mechanism can be adjusted along the direction of the second through hole 1411 when installing the battery cell 20, thereby adapting to battery cells 20 of different thicknesses, enabling clamping of various models of battery cells 20, improving clamping strength, facilitating operation, and further improving testing efficiency.

[0143] The fixing mechanism can be bolts, clips, etc., and the embodiments of this application are not limited to this.

[0144] The second adjustment part 141 can be implemented in other ways. For example, the second adjustment part 141 may include a snap-fit ​​component and a plurality of slots disposed on the connecting plate 14 along a third direction. The spacing between the two connecting sub-plates can be adjusted by the cooperation of the snap-fit ​​component and the plurality of slots. This application embodiment is not limited thereto.

[0145] In the technical solution provided in this application embodiment, the second adjustment part 141 is adapted to battery cells 20 of different thicknesses, which can clamp various types of battery cells 20, improve the clamping strength, and further improve the testing efficiency.

[0146] In some possible embodiments, a first rib 161 is provided between the connecting plate 14 and the first clamping plate 151, and a second rib 162 is provided between the connecting plate 14 and the second clamping plate 152. The first rib 161 connects the side of the connecting plate 14 away from the fixing plate 11 and the side of the first clamping plate 151 away from the battery cell 20, and the second rib 162 connects the side of the connecting plate 14 away from the fixing plate 11 and the side of the second clamping plate 152 away from the battery cell 20.

[0147] The ribs in this application embodiment can have various shapes. For example, the ribs in the figure are triangular, but this application embodiment is not limited to this. The ribs can also be square, rectangular, rhomboid, etc.

[0148] In the technical solution provided in this application embodiment, a first rib 161 is provided between the connecting plate 14 and the first clamping plate 151, and a second rib 162 is provided between the connecting plate 14 and the second clamping plate 152, thereby improving the stability of the two clamping plates clamping the battery cell 20 and improving the anti-fall performance during the handling and fixing device 1 process.

[0149] See Figure 10 and Figure 11 And further reading Figure 13 and Figure 14 ,in, Figure 13 A schematic diagram of the first clamping plate 151 in the fixing device 1 provided in a certain embodiment of this application is shown; Figure 14 This diagram illustrates a fixed device 1 provided in one embodiment of the present application being moved by an operating device 31.

[0150] In some possible embodiments, the first clamping plate 151 is provided with a first groove 1511, and the second clamping plate 152 is provided with a second groove 1521, wherein the first groove 1511 and the second groove 1521 are disposed opposite to each other along the thickness direction of the first clamping plate 151.

[0151] In the technical solution provided in this application embodiment, when moving the fixing device 1, the operating device 31 can bear part of the weight of the fixing device 1 through the first groove 1511 and the second groove 1521, making it more stable during the moving process and improving the anti-fall performance during the moving process.

[0152] According to certain embodiments of this application, a testing system is also provided for compressive testing of a battery cell 20. The testing system includes a fixing plate 11 and a clamping mechanism 12. The clamping mechanism 12 is detachably connected to the fixing plate 11 so that the fixing plate 11 is detachably connected to one of two different clamping mechanisms 12. The two different clamping mechanisms 12 are respectively used for compressive testing of the wall with the largest surface area of ​​the battery cell 20 and for compressive testing of the walls other than the wall with the largest surface area of ​​the battery cell 20. One clamping mechanism includes a pressing plate 121 that fits against a second wall 22; and a connecting part 122 that connects the pressing plate 121 and the fixing plate 11 so that the pressing plate 121 and the fixing plate 11 cooperate to clamp the battery cell 20. The pressing plate 121 fits against the wall with the largest surface area of ​​the battery cell 20 and has an avoidance area. The wall with the largest surface area of ​​the battery cell 20 in the avoidance area is not covered by the fixing device 1, so that the compressive test can be performed from the front of the battery cell 20. Another clamping mechanism includes a connecting plate 14, which is fixedly connected to a fixing plate 11; a first clamping plate 151 and a second clamping plate 152, which are fixedly connected to the connecting plate 14. The first clamping plate 151 and the second clamping plate 152 are arranged opposite to each other and respectively abut against the wall with the largest surface area of ​​the battery cell 20. The fixing plate 11 abuts against one of the opposite side walls, and the other side wall is not covered by the fixing device 1, so that the battery cell 20 can be squeezed from the side. The battery cell 20 is fixed by two clamping mechanisms 12 that are detachably connected to the fixing plate 11. The fixing device 1 can accommodate both front and side squeezing tests of the battery cell 20, improving the testing efficiency.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A fixture, characterized in that The fixing device is used for extrusion test of a battery monomer (20), the battery monomer (20) comprises a first wall (21) and a second wall (22) arranged oppositely, and the fixing device comprises: a fixing plate (11) and a clamping mechanism (12) connected to the fixing plate (11), one side of the fixing plate (11) is attached to the first wall (21) of the battery monomer (20), and the clamping mechanism (12) clamps the battery monomer (20), wherein at least part of the second wall (22) is not covered by the fixing device.

2. The fixture of claim 1, wherein The second wall (22) is the wall with the largest surface area of the battery monomer (20), and the clamping mechanism (12) comprises: a pressing plate (121) attached to the second wall (22); a connecting part (122) connecting the pressing plate (121) and the fixing plate (11) so that the pressing plate (121) and the fixing plate (11) cooperate to clamp the battery monomer (20).

3. The fixture of claim 2, wherein The pressing plate (121) comprises a first pressing sub-part (1211) and a second pressing sub-part (1212), the first pressing sub-part (1211) and the second pressing sub-part (1212) are arranged in a first direction to make at least part of the second wall (22) not covered by the fixing device, wherein the first direction is perpendicular to the thickness direction of the pressing plate (121).

4. The fixture of claim 2, wherein The connecting part (122) comprises: a first adjusting part (123) configured to adjust the distance between the fixing plate (11) and the pressing plate (121).

5. The fixture of claim 4, wherein The connecting part (122) comprises a connecting column, one end of the connecting column is fixedly connected to the fixing plate (11); The first adjusting part (123) comprises a threaded hole and a bolt, the pressing plate (121) comprises a first through hole (1215), the threaded hole is arranged at the other end of the connecting column, and the opening of the threaded hole is arranged opposite to the first through hole (1215); wherein the bolt passes through the first through hole (1215) to cooperate with the threaded hole to adjust the distance between the fixing plate (11) and the pressing plate (121).

6. The fixture of claim 5, wherein The fixing plate (11) is respectively provided with a first notch (111) on both sides along a first direction, and the pressing plate (121) is respectively provided with a second notch (1213) on both sides along the first direction, wherein the first direction is perpendicular to the thickness direction of the pressing plate (121), and the first notch (111) and the second notch (1213) are arranged opposite along the thickness direction of the pressing plate (121).

7. The fixture of claim 6, wherein The fixing plate (11) further comprises a first protruding structure (112) protruding towards the pressing plate (121), and the first protruding structure (112) is arranged on one side of the first notch (111) along a second direction, wherein the second direction is perpendicular to the first direction and the thickness direction of the fixing plate (11). The pressing plate (121) further comprises a second protruding structure (1214) protruding towards the fixed plate (11), and the second protruding structure (1214) is arranged on one side of the second notch (1213) along the second direction.

8. The fixture of claim 1, wherein The battery monomer (20) comprises two third walls (23) arranged oppositely, the two third walls (23) are the walls with the largest surface area of the battery monomer (20), the surface area of the second wall (22) is smaller than that of the third wall (23), and the clamping mechanism (12) comprises: A connecting plate (14) fixedly connected to the fixed plate (11); A first clamping plate (151) and a second clamping plate (152) fixedly connected to the connecting plate (14), the first clamping plate (151) and the second clamping plate (152) are arranged oppositely and respectively abut the two third walls (23).

9. The fixture of claim 8, wherein, The connecting plate (14) comprises: Two connecting sub-plates, at least one of the connecting sub-plates is provided with a second adjusting part (141), Wherein, the at least one connecting sub-plate is fixedly connected to the fixed plate (11) through the second adjusting part (141) to adjust the distance between the two connecting sub-plates.

10. The fixture of claim 9, wherein, The second adjusting part (141) comprises a fixing mechanism and a second through hole (1411) provided on the connecting plate (14), and the fixing mechanism passes through the second through hole (1411) to fix the connecting plate (14) to the fixed plate (11); Wherein, the second through hole (1411) extends along a third direction, and the third direction is perpendicular to the third wall (23).

11. The fixture of claim 10, wherein, A first rib plate (161) is arranged between the connecting plate (14) and the first clamping plate (151), and a second rib plate (162) is arranged between the connecting plate (14) and the second clamping plate (152), Wherein, the first rib plate (161) connects one side of the connecting plate (14) away from the fixed plate (11) and one side of the first clamping plate (151) away from the battery monomer (20), and the second rib plate (162) connects one side of the connecting plate (14) away from the fixed plate (11) and one side of the second clamping plate (152) away from the battery monomer (20).

12. The fixture of claim 8, wherein, The first clamping plate (151) is provided with a first groove (1511), and the second clamping plate (152) is provided with a second groove (1521), Wherein, the first groove (1511) and the second groove (1521) are arranged oppositely along the thickness direction of the first clamping plate (151).

13. The fixture of any one of claims 1 to 12, wherein, The fixing device further comprises: A shell (13) having a containing cavity; A collection module (132) contained in the containing cavity, the collection module (132) is electrically connected with the battery monomer (20); Wherein, the fixed plate (11) is fixedly connected to the shell (13).

14. The fixture of claim 13, wherein, The shell (13) comprises a first wall (21) provided with a third through hole (131), The acquisition module (132) is electrically connected to the battery monomer (20) through an acquisition circuit, and the acquisition circuit passes through the third through hole (131).

15. The fixture of claim 14, wherein, The fixing device further comprises: A heat insulation layer covering one side of the first wall (21) facing the acquisition module (132) and one side of the fixing plate (11) facing the acquisition module (132).

16. A test system, characterized by The test system is used for extrusion test of the battery monomer (20), the battery monomer (20) comprises a first wall (21) and a second wall (22) arranged oppositely, and the test system comprises: A fixing plate (11) and a clamping mechanism (12), one side of the fixing plate (11) facing the battery monomer (20) is attached to the first wall (21), The clamping mechanism (12) clamps the battery monomer (20), the clamping mechanism (12) is detachably connected to the fixing plate (11) so that the fixing plate (11) is detachably connected to one of two different clamping mechanisms (12), the two different clamping mechanisms (12) are respectively used for extrusion test of the wall with the largest surface area of the battery monomer (20) and extrusion test of the wall other than the wall with the largest surface area of the battery monomer (20), and at least part of the second wall (22) is not covered by the clamping mechanism (12).

17. The test system of claim 16, wherein, The second wall (22) is the wall with the largest surface area of the battery monomer (20), and the clamping mechanism (12) comprises: A compression plate (121) attached to the second wall (22); A connecting part (122) connecting the compression plate (121) and the fixing plate (11) so that the compression plate (121) and the fixing plate (11) cooperate to clamp the battery monomer (20).

18. The test system of claim 16 or 17, wherein, The second wall (22) has a surface area smaller than that of the two walls with the largest surface area of the battery monomer (20), and the clamping mechanism (12) comprises: A connecting plate (14) fixedly connected to the fixing plate (11); A first clamping plate (151) and a second clamping plate (152) fixedly connected to the connecting plate (14), the first clamping plate (151) and the second clamping plate (152) are arranged oppositely and respectively attached to the two walls with the largest surface area of the battery monomer (20).

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