Battery cell extrusion test tool and test equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cell extrusion test tool and test device.The battery cell extrusion test tool comprises a bottom plate, a vertical plate and a limiting assembly, and the bottom plate is used for placing a to-be-tested battery cell; the vertical plate is arranged on the bottom plate and used for abutting against the side face, provided with an anti-explosion valve, of a to-be-tested cell, and an airflow channel is formed in the vertical plate. And the limiting assembly is arranged on the bottom plate and is used for limiting the to-be-tested battery cell, so that an anti-explosion valve of the to-be-tested battery cell is arranged opposite to the airflow channel. According to the application, the airflow channel is formed in the vertical plate, the airflow channel can provide a gas circulation space for the explosion-proof valve, and when the battery cell is subjected to thermal runaway in the extrusion test process, airflow sprayed out from the explosion-proof valve can be sprayed out from the airflow channel, so that the risk caused by the thermal runaway of the battery cell is reduced, and the safety of the extrusion test of the battery cell is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery cell extrusion testing tooling and testing equipment. Background Art

[0002] With the rapid development of the new energy vehicle industry, the quality and performance of battery cells in the field of battery manufacturing technology directly affect the overall performance of the battery. Therefore, rigorous testing of battery cells is very necessary. Among them, the battery cell extrusion test is a common test method used to evaluate the pressure resistance and safety of battery cells.

[0003] At present, when conducting back-extrusion tests on battery cell explosion-proof valves, the battery cell explosion-proof valves are usually blocked by the back plate of the tooling. Once the battery cell loses control during the extrusion test, a safety accident may occur. Utility Model Content

[0004] The present application provides a battery cell extrusion test tool and test equipment to solve the problem in the prior art that when performing a battery cell extrusion test, the battery cell explosion-proof valve is usually blocked by the tool back plate, which may cause a safety accident if the battery cell loses control during the extrusion test.

[0005] In one aspect, the present application provides a battery cell extrusion test fixture, comprising:

[0006] Bottom plate, used to place the battery cell to be tested;

[0007] A vertical plate is provided on the bottom plate and is used to abut against a side of the battery cell to be tested having an explosion-proof valve, and an air flow channel is formed on the vertical plate;

[0008] The limiting component is arranged on the bottom plate and is used to limit the battery cell to be tested so that the explosion-proof valve of the battery cell to be tested is arranged relative to the air flow channel.

[0009] In a possible design, through holes and / or grooves are provided on the vertical plate, and the through holes and / or grooves form air flow channels.

[0010] In one possible design, the tooling also includes a first pad, which is arranged on the vertical plate and is used to abut against the side of the battery cell to be tested having an explosion-proof valve. An avoidance groove is provided on the first pad, and an avoidance hole is provided at the bottom of the avoidance groove. The avoidance hole is arranged opposite to the airflow channel.

[0011] In one possible design, the tooling further includes a second pad, which is disposed on the vertical plate and is used to abut against a side of the battery cell to be tested having an explosion-proof valve, and the orthographic projection of the second pad on the vertical plate is located on the side of the air flow channel close to the bottom plate.

[0012] In a possible design, the tooling further includes a support pad, which is arranged on a side of the vertical plate facing away from the battery cell to be tested.

[0013] In one possible design, the limiting assembly includes a first limiting plate and a second limiting plate that are relatively arranged. The first limiting plate and the second limiting plate are respectively detachably connected to the bottom plate, and the first limiting plate and the second limiting plate are respectively used to abut against the opposite side surfaces of the battery cell to be tested.

[0014] In one possible design, a first adjustment hole is formed on the bottom plate, and a first threaded hole is formed on the side of the first limiting plate and the second limiting plate close to the bottom plate, respectively. The first bolt passes through the first adjustment hole and the first threaded hole in sequence to connect the bottom plate to the first limiting plate and the second limiting plate, respectively.

[0015] A second adjustment hole is provided on the vertical plate, and a second threaded hole is provided on the side of the first limit plate and the second limit plate close to the vertical plate respectively. The second bolt passes through the second adjustment hole and the second threaded hole in sequence to connect the vertical plate to the first limit plate and the second limit plate respectively.

[0016] In a possible design, the first adjustment hole and the second adjustment hole are respectively rectangular holes, and the length directions of the rectangular holes are perpendicular to the first limiting plate and the second limiting plate.

[0017] In a possible design, locking holes are respectively provided on the first limiting plate and the second limiting plate, and the tooling further includes a locking bolt, which passes through the locking hole to connect the first limiting plate and the second limiting plate to each other.

[0018] On the other hand, the present application also provides a battery cell extrusion test device, including the battery cell extrusion test tooling as described above.

[0019] The beneficial effects of this application are as follows:

[0020] The battery cell extrusion test tooling of the present application has an air flow channel formed on the vertical plate, and the battery cell to be tested is limited by a limiting component so that the explosion-proof valve of the battery cell to be tested is arranged relative to the air flow channel. The vertical plate can abut against the side of the battery cell to be tested with the explosion-proof valve, and the air flow channel can provide space for gas circulation in the explosion-proof valve. When the battery cell suffers from thermal runaway during the extrusion test, the air flow ejected from the explosion-proof valve can be ejected from the air flow channel, thereby reducing the risk brought about by thermal runaway of the battery cell and improving the safety of the battery cell extrusion test.

[0021] The battery cell extrusion test equipment provided in the present application includes the battery cell extrusion test tooling in the present application, and therefore also includes all the above-mentioned advantages of the battery cell extrusion test tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 A schematic diagram of the structure of a battery cell extrusion test tool provided in one embodiment of the present application;

[0024] Figure 2 A schematic structural diagram of a battery cell extrusion test fixture provided in another embodiment of the present application;

[0025] Figure 3 A schematic structural diagram of a battery cell extrusion test fixture provided in yet another embodiment of the present application;

[0026] Figure 4 A schematic structural diagram of a first pad of a battery cell extrusion test fixture provided in one embodiment of the present application;

[0027] Figure 5 A schematic structural diagram of a second pad of a battery cell extrusion test fixture provided in one embodiment of the present application;

[0028] Figure 6 A schematic structural diagram of a support pad of a battery cell extrusion test fixture provided in one embodiment of the present application;

[0029] Figure 7 A schematic diagram of the usage status of the battery cell extrusion test tool provided in one embodiment of the present application.

[0030] Reference numerals:

[0031] 100, bottom plate; 200, vertical plate; 210, air flow channel; 300, limit assembly; 310, first limit plate; 320, second limit plate; 400, first pad; 410, avoidance groove; 420, avoidance hole; 500, second pad; 600, support pad; 710, first adjustment hole; 720, first bolt; 810, second adjustment hole; 820, second bolt; 900, locking bolt. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions of this application in conjunction with the embodiments. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] The following combination Figure 1-Figure 7 , describing the battery cell extrusion test tooling provided in the embodiments of the present application.

[0034] Reference Figure 1 As shown, the battery cell extrusion test tool provided in the embodiment of the present application includes a base plate 100, a vertical plate 200 and a limiting assembly 300. The base plate 100 is used to place the battery cell to be tested; the vertical plate 200 is arranged on the base plate 100, and is used to abut against the side of the battery cell to be tested having an explosion-proof valve, and an air flow channel 210 is formed on the vertical plate 200; the limiting assembly 300 is arranged on the base plate 100, and the limiting assembly 300 is used to limit the battery cell to be tested so that the explosion-proof valve of the battery cell to be tested is arranged relative to the air flow channel 210. Specifically, the bottom plate 100 is perpendicular to the vertical plate 200, and the bottom plate 100 and the vertical plate 200 are fixedly connected by bolts or screws; the battery cell to be tested has six outer side surfaces, including a front large surface, a rear large surface, a left side surface, a right side surface, a bottom surface and a top surface, wherein the bottom surface of the battery cell to be tested is placed on the bottom plate 100, and the left side of the battery cell to be tested is a side surface with an explosion-proof valve. The limit assembly 300 contacts the front large surface and the rear large surface of the battery cell to be tested to prevent the battery cell to be tested from shifting during the test; the extrusion head squeezes the top surface of the battery cell to be tested so that the bottom surface of the battery cell to be tested abuts against the bottom plate 100, and the extrusion head squeezes the right side of the battery cell to be tested so that the left side of the battery cell to be tested abuts against the vertical plate 200, thereby completing the extrusion test of the battery cell to be tested.

[0035] In some specific embodiments, a through hole is provided on the vertical plate 200, and the through hole is arranged opposite to the explosion-proof valve of the battery cell to be tested. The through hole serves as an air flow channel 210. When the battery cell to be tested has thermal runaway during the extrusion test, the air flow ejected from the explosion-proof valve can be ejected from the through hole; in other specific embodiments, a groove is provided on the vertical plate 200, and the groove can extend along the length and width directions of the vertical plate 200 to the edge of the vertical plate 200, so that the groove forms an air flow channel 210. When the battery cell to be tested has thermal runaway, the air flow ejected from the explosion-proof valve can flow along the groove to the edge of the vertical plate 200 and then be ejected; in some other specific embodiments, a through hole and a groove are provided on the vertical plate 200 at the same time. When the battery cell to be tested has thermal runaway, part of the air flow ejected from the explosion-proof valve is ejected from the vent, and part of the air flow flows along the groove to the edge of the vertical plate 200 and is ejected.

[0036] By utilizing the technical solution in the above embodiment, an air flow channel 210 is formed on the vertical plate 200, and the battery cell to be tested is limited by the limiting component 300, so that the explosion-proof valve of the battery cell to be tested is arranged opposite to the air flow channel 210. The vertical plate 200 can abut against the side of the battery cell to be tested having the explosion-proof valve, and the air flow channel 210 can provide space for gas circulation for the explosion-proof valve. When the battery cell to be tested has thermal runaway during the extrusion test, the air flow ejected from the explosion-proof valve can be ejected from the air flow channel 210, thereby reducing the risk brought about by thermal runaway of the battery cell and improving the safety of the battery cell extrusion test.

[0037] Reference Figure 2 、 Figure 4 As shown, in some embodiments provided herein, the tooling further includes a first pad 400, which is disposed on the vertical plate 200 and is used to abut the side of the cell to be tested that has the explosion-proof valve. The first pad 400 is provided with an escape groove 410, and the bottom of the escape groove 410 is provided with an escape hole 420, which is arranged opposite to the airflow channel 210. Specifically, the depth of the escape groove 410 is greater than the safe distance for the airflow to be ejected from the explosion-proof valve, thereby leaving sufficient space for the ejected airflow, allowing the airflow in the explosion-proof valve to safely pass through the escape hole 420 and be ejected from the airflow channel 210, thereby reducing the risk of the cell to be tested from losing control during the extrusion process. It should be noted that when the extrusion head is extruding the right side of the cell to be tested, the left side of the cell to be tested, except for the position of the explosion-proof valve, should all abut against the first pad 400. Therefore, the height of the first pad 400 should be greater than or equal to the height of the cell to be tested.

[0038] It should be noted that when the extrusion head is extruding the top surface of the battery cell to be tested, if the first pad 400 is used, since the height of the first pad 400 is greater than or equal to the height of the battery cell to be tested, the extrusion head and the first pad 400 will interfere with each other. In view of this, in some other embodiments provided in the present application, the tooling further includes a second pad 500, referring to Figure 3 、 Figure 5As shown, the second pad 500 is disposed on the vertical plate 200 and is configured to abut the side of the cell under test having the explosion-proof valve. The orthographic projection of the second pad 500 on the vertical plate 200 is located on the side of the airflow channel 210 that is closest to the base plate 100. It should be noted that when the extrusion head compresses the top surface of the cell under test, the entire left side of the cell under test, except for the location of the explosion-proof valve, does not need to abut the second pad 500. Therefore, the height of the second pad 500 can be relatively low, for example, lower than the lowest point of the airflow channel 210. This allows the second pad 500 to successfully avoid the airflow channel 210. Furthermore, the second pad 500 can separate the airflow channel 210 from the explosion-proof valve, creating a certain distance between them. This leaves sufficient space for the jet airflow, allowing the airflow within the explosion-proof valve to safely escape from the airflow channel 210, thereby reducing the risk of the cell under test losing control during the extrusion process.

[0039] In reference Figure 6 As shown, in some embodiments provided herein, the tooling further includes a support block 600, which is disposed on the side of the vertical plate 200 facing away from the cell to be tested. In some specific embodiments, the support block 600 includes two blocks, each symmetrically disposed on the side of the vertical plate 200 facing away from the cell to be tested, with the airflow channel 210 located in the area between the two blocks 600. By disposing the support block 600 so that one side of the support block 600 abuts against the fixed wall, a certain distance can be created between the vertical plate 200 and the fixed wall, leaving sufficient space for the jet airflow and reducing the risk of the cell to be tested losing control during the extrusion process.

[0040] In reference Figure 7As shown, in some embodiments provided in the present application, the limiting assembly 300 includes a first limiting plate 310 and a second limiting plate 320 arranged relatively to each other, and the first limiting plate 310 and the second limiting plate 320 are respectively detachably connected to the base plate 100, and the first limiting plate 310 and the second limiting plate 320 are respectively used to abut against the opposite side surfaces of the battery cell to be tested. Specifically, the first limiting plate 310 abuts against the front large surface of the battery cell to be tested, and the second limiting plate 320 abuts against the rear large surface of the battery cell to be tested, thereby limiting the battery cell to be tested on the base plate 100. In some specific embodiments, a first adjustment hole 710 is defined in the bottom plate 100, and a first threaded hole is defined in each of the first and second limiting plates 310, 320 on a side proximal to the bottom plate 100. A first bolt 720 passes through the first adjustment hole 710 and the first threaded hole, respectively, to connect the bottom plate 100 to the first and second limiting plates 310, 320. A second adjustment hole 810 is defined in the vertical plate 200, and a second threaded hole is defined in each of the first and second limiting plates 310, 320 on a side proximal to the vertical plate 200. A second bolt 820 passes through the second adjustment hole 810 and the second threaded hole, respectively, to connect the vertical plate 200 to the first and second limiting plates 310, 320. In some specific embodiments, the first and second adjustment holes 710, 810 are rectangular holes, the lengths of which are perpendicular to the first and second limiting plates 310, 320. In this way, by adjusting the position of the first bolt 720 in the first adjustment hole 710 and adjusting the position of the second bolt 820 in the second adjustment hole 810, the positions of the first limiting plate 310 and the second limiting plate 320 are adjusted together, so that the first limiting plate 310 and the second limiting plate 320 can press the front large surface and the rear large surface of the battery cell to be tested together, which is conducive to the tooling of this application to perform extrusion tests on battery cells to be tested of different sizes.

[0041] Reference Figure 7 As shown, locking holes are respectively formed in the first and second limiting plates 310, 320. The tooling also includes locking bolts 900, which pass through the locking holes to connect the first and second limiting plates 310, 320. The locking bolts 900 further reinforce the first and second limiting plates 310, 320, thereby improving the stability of the tooling.

[0042] The workflow of the battery cell extrusion test fixture of this application is as follows:

[0043] Install the support block 600 and the first block 400 on the vertical plate 200, and install the first limit plate 310 and the second limit plate 320 on the bottom plate 100. Adjust the first limit plate 310 and the second limit plate 320 so that the front and rear surfaces of the battery cell to be tested are respectively against the first limit plate 310 and the second limit plate 320, and the left side of the battery cell to be tested is against the first block 400; and the extrusion head performs a single extrusion on the right side of the battery cell to be tested.

[0044] After one extrusion is completed, the first pad 400 is removed from the vertical plate 200 and replaced with the second pad 500. The first limiting plate 310 and the second limiting plate 320 are adjusted so that the front large surface and the rear large surface of the battery cell to be tested are respectively against the first limiting plate 310 and the second limiting plate 320, and the left side of the battery cell to be tested is against the second pad 500. The extrusion head performs a second extrusion on the top surface of the battery cell to be tested to complete the test.

[0045] If the battery cell to be tested goes out of control during the test, the airflow ejected from the explosion-proof valve will be ejected from the airflow channel 210 .

[0046] An embodiment of the present application also provides a battery cell extrusion test device, including the battery cell extrusion test tooling in the above embodiment.

[0047] It should be noted that the battery cell extrusion test equipment includes the battery cell extrusion test tooling, which also includes all the advantages of the battery cell extrusion test tooling mentioned above, which will not be repeated here.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0050] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0051] In this application, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0052] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery cell extrusion test tool, characterized in that: include: Bottom plate, used to place the battery cell to be tested; A vertical plate is provided on the bottom plate and is used to abut against a side of the battery cell to be tested having an explosion-proof valve, and an air flow channel is formed on the vertical plate; A limiting component is arranged on the bottom plate, and is used to limit the battery cell to be tested so that the explosion-proof valve of the battery cell to be tested is arranged relative to the air flow channel.

2. The battery cell extrusion test fixture according to claim 1, characterized in that: The vertical plate is provided with through holes and / or grooves, and the through holes and / or the grooves form the air flow channels.

3. The battery cell extrusion test fixture according to claim 1, characterized in that: It also includes a first pad, which is arranged on the vertical plate and is used to abut against the side of the battery cell to be tested having an explosion-proof valve. The first pad is provided with an avoidance groove, and the bottom of the avoidance groove is provided with an avoidance hole, and the avoidance hole is arranged opposite to the airflow channel.

4. The battery cell extrusion test fixture according to claim 1, characterized in that: It also includes a second pad, which is arranged on the vertical plate and is used to abut against the side of the battery cell to be tested having an explosion-proof valve. The orthographic projection of the second pad on the vertical plate is located on the side of the air flow channel close to the bottom plate.

5. The battery cell extrusion test fixture according to any one of claims 1 to 4, characterized in that: It also includes a support pad, which is arranged on a side of the vertical plate away from the battery cell to be tested.

6. The battery cell extrusion test fixture according to claim 5, characterized in that: The limiting assembly includes a first limiting plate and a second limiting plate arranged opposite to each other. The first limiting plate and the second limiting plate are respectively detachably connected to the bottom plate. The first limiting plate and the second limiting plate are respectively used to abut against two opposite side surfaces of the battery cell to be tested.

7. The battery cell extrusion test fixture according to claim 6, characterized in that: The bottom plate is provided with a first adjustment hole, and the first limiting plate and the second limiting plate are respectively provided with a first threaded hole on one side close to the bottom plate, and a first bolt passes through the first adjustment hole and the first threaded hole in sequence to connect the bottom plate to the first limiting plate and the second limiting plate respectively; A second adjustment hole is provided on the vertical plate, and a second threaded hole is provided on the side of the first limiting plate and the second limiting plate close to the vertical plate respectively. The second bolt passes through the second adjustment hole and the second threaded hole in sequence to connect the vertical plate to the first limiting plate and the second limiting plate respectively.

8. The battery cell extrusion test fixture according to claim 7, characterized in that: The first adjustment hole and the second adjustment hole are rectangular holes respectively, and the length directions of the rectangular holes are perpendicular to the first limiting plate and the second limiting plate.

9. The battery cell extrusion test fixture according to claim 8, characterized in that: The first limiting plate and the second limiting plate are respectively provided with locking holes, and the tooling further includes a locking bolt, which passes through the locking holes to connect the first limiting plate and the second limiting plate to each other.

10. A battery cell extrusion test device, characterized by: The invention comprises the battery cell extrusion test tool as described in any one of claims 1 to 9.

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