Battery assembly jig

Abstract

The application relates to the technical field of solid-state battery manufacturing, and provides a battery assembling clamp. The battery assembling clamp is used for assembling a positive electrode sheet, an electrolyte layer and a negative electrode sheet into an electric core stack, and the clamp comprises a base, a stacking frame body and a cover plate. The stacking frame body is arranged on the base, the stacking frame body is provided with a first through hole and a second through hole, the first through hole and the second through hole are communicated, and the first through hole and the second through hole and the base define a first accommodating groove and a second accommodating groove. The first accommodating groove is used for accommodating a main body part of the electric core stack, and the second accommodating groove is used for accommodating a tab part of the electric core stack. The cover plate is arranged on the stacking frame body, and the cover plate is provided with a pressing part. The pressing part can be inserted into the first accommodating groove, so that the main body part can be pressed. The battery assembling clamp provided by the application not only can avoid damage of a traditional external clamp to an electric core, but also can improve the assembling efficiency and the preparation yield of the electric core stack.

Description

Technical Field

[0001] This application relates to the field of solid-state battery manufacturing technology, and in particular to a battery assembly fixture. Background Technology

[0002] In terms of structure, a solid-state battery cell typically includes positive and negative electrode plates stacked along the thickness direction, and an electrolyte layer sandwiched between the positive and negative electrode plates. In other words, positive electrode plates, electrolyte layer, negative electrode plates, electrolyte layer, positive electrode plates... are stacked to form a cell stack.

[0003] Traditional solid-state battery cell assembly typically employs a manual stacking method, alternatingly stacking the positive electrode, electrolyte layer, and negative electrode in a specific order. However, this method is not only inefficient, but also prone to misalignment of the electrodes and electrolyte layers during stacking, leading to short circuits and battery burnout. Furthermore, after the electrodes and electrolyte layers are stacked, clamps and tape are needed to secure the cell stack. The clamps used can easily damage the cells and cause material loss, resulting in low cell yield. Utility Model Content

[0004] In view of this, this application aims to provide a battery assembly fixture to improve the cell assembly efficiency and cell preparation yield of solid-state batteries.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: A battery assembly fixture for assembling a positive electrode, an electrolyte layer and a negative electrode into a cell stack, comprising a base, a stacking frame and a cover plate; The stacking frame is disposed on the base, and the stacking frame has a first through hole and a second through hole that are connected through each other. The first through hole and the second through hole are connected to each other, and a first receiving groove and a second receiving groove are defined between the first through hole and the second through hole and the base. The first receiving groove is used to receive the main body part of the battery cell stack, and the second receiving groove is used to receive the electrode part of the battery cell stack. The cover plate is disposed on the stacked frame, and the cover plate is provided with a pressing part, which can be inserted into the first receiving groove to apply pressure to the main body.

[0006] Furthermore, the base is provided with a support portion protruding upwards; the support portion can be inserted into the first through hole, and the support portion is used to support the main body portion.

[0007] Furthermore, the fitting clearance between the support portion and the first through hole is between 0mm and 0.04mm.

[0008] Furthermore, the height of the support portion is between 0.3cm and 1cm.

[0009] Furthermore, the cover plate includes a cover body connected to the pressing part; the pressing part is located on the side of the cover body facing the stacking frame.

[0010] Furthermore, the fitting gap between the pressing part and the first receiving groove is between 0mm and 0.04mm.

[0011] Furthermore, the height H1 of the pressing part is 0.3cm-0.5cm greater than the depth H2 of the first through hole.

[0012] Furthermore, the cover plate is provided with an operating part, which is used to operate the disassembly and assembly of the cover plate.

[0013] Furthermore, the base, the stacking frame, and the cover plate are all made of stainless steel.

[0014] Compared with related technologies, this application has the following advantages: (1) The battery assembly fixture described in this application, by setting a base, a stacking frame and a cover plate, defines a first receiving groove and a second receiving groove respectively by setting a first through hole and a second through hole on the base and the stacking frame. This allows the main body and the tabs of the battery cell stack to be received in the first receiving groove and the second receiving groove respectively. That is, the main body of the positive and negative electrode sheets and the electrolyte layer are received in the first receiving groove, and the tabs of the positive and negative electrode sheets are received in the second receiving groove. Then, the pressing part on the cover plate applies pressure to the stacked battery cell stack, so that the battery cell stack is formed as a whole. Then, the separation of the cover plate, the stacking frame and the base facilitates the removal of the battery cell stack. Moreover, this assembly fixture eliminates the need to use external clamps to hold the battery cell stack, thus avoiding damage to the battery cells by external clamps. At the same time, the second receiving groove can also play a positioning role, which helps to ensure the stacking position accuracy of the electrode sheets and electrolyte layer, thereby improving the assembly efficiency and preparation yield of the battery cell stack.

[0015] (2) The support part provided on the base can provide good support for the main body of the cell stack, and the cooperation between the support part and the pressing part can better apply pressure to the main body, so that the electrodes are attached and fixed together to form an integral cell stack.

[0016] (3) Limiting the fit gap between the support part and the first through hole is beneficial to the separation of the stacked frame and the base, and facilitates the removal of the battery cell stack. On the other hand, it can improve the support accuracy of the main body and avoid large displacement of the electrode or electrolyte layer during the assembly process due to excessive gap, which would affect the assembly quality of the battery cell stack.

[0017] (4) Limiting the height of the support part can not only guide the installation of the stacked frame on the base, but also avoid occupying too much space in the first receiving slot due to excessive height, and also facilitate the assembly of battery cell stacks of different thicknesses.

[0018] (5) The cover plate includes a connected cover body and a pressing part, such that the pressing part is located on the side of the body facing the stacked frame. This structure not only facilitates the preparation and processing of the cover plate, but also, by utilizing the cooperation between the cover body and the stacked frame, it is also beneficial for the pressing part to accurately apply pressure to the main body of the cell stack, ensuring stability and reliability during the pressure application process.

[0019] (6) Limiting the gap between the pressing part and the first receiving groove can improve the overall pressure effect on the main body and facilitate the separation of the pressing part from the first receiving groove, making it easier to remove the battery cell stack.

[0020] (7) The height of the pressing part is 0.3cm-0.5cm greater than the depth of the first through hole. On the one hand, this ensures that the pressing part applies sufficient pressure to the main body. On the other hand, it avoids the cover plate from being too large in volume and weight due to excessive height.

[0021] (8) The operation section is provided to facilitate the insertion of the cover plate, and also to facilitate the installation and removal of the cover plate on the stacked frame.

[0022] (9) The base, stacking frame and cover are all made of stainless steel. The good strength, hardness and corrosion resistance of stainless steel can be used to ensure the structural stability and accuracy of the fixture during use, which helps to ensure the quality and consistency of battery assembly. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the battery assembly fixture described in the embodiments of this application; Figure 2 This is a front view of the base described in an embodiment of this application; Figure 3 This is a top view of the base described in the embodiment of this application; Figure 4 This is a right view of the base described in the embodiment of this application; Figure 5 This is a front view of the stacked frame described in the embodiments of this application; Figure 6 This is a top view of the stacked frame described in the embodiment of this application; Figure 7 This is a front view of the cover plate described in the embodiment of this application; Figure 8 This is a top view of the cover plate described in the embodiment of this application; Figure 9 This is a right view of the cover plate described in the embodiment of this application; Figure 10 This is a schematic diagram of another structure of the cover plate described in the embodiments of this application; Figure 11 This is a structural diagram showing the application state of the battery assembly fixture described in the embodiments of this application; Explanation of reference numerals in the attached figures: 1. Base; 2. Stacking frame; 3. Cover plate; 101. Support part; 201. First through hole; 202. Second through hole; 301. Cover body; 302. Pressing part; 303. Operating part; 10. Cell stack body. Detailed Implementation

[0024] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0026] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0028] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0030] An embodiment of the first aspect of this application provides a battery assembly fixture for assembling a positive electrode, an electrolyte layer, and a negative electrode into a cell stack. By optimizing the fixture structure, it is beneficial to improve the cell assembly efficiency and cell preparation yield of solid-state batteries.

[0031] In related technologies, the structure of a solid-state battery cell typically includes positive and negative electrode sheets stacked along the thickness direction, and an electrolyte layer sandwiched between the positive and negative electrode sheets. In other words, positive electrode sheets, electrolyte layer, negative electrode sheets, electrolyte layer, positive electrode sheets... are stacked to form a cell stack.

[0032] Traditional solid-state battery cell assembly typically employs a manual stacking method, alternatingly layering the positive electrode, electrolyte layer, and negative electrode in a specific order. However, this method is not only inefficient, but also prone to misalignment of the electrodes and electrolyte layers during stacking, leading to short circuits and battery burnout. Furthermore, after the electrodes and electrolyte layers are stacked, clamps and tape are needed to secure the cell stack. The clamps used can easily damage the cells and cause material loss, resulting in low cell yield.

[0033] In view of this, in order to overcome the shortcomings of the related technology, the battery assembly fixture in this embodiment combines... Figures 1 to 11 As shown, the overall design includes a base 1, a stacking frame 2, and a cover plate 3.

[0034] The stacking frame 2 is mounted on the base 1 and has a first through hole 201 and a second through hole 202 that are connected to each other. The first through hole 201 and the second through hole 202 define a first receiving groove and a second receiving groove between the first through hole 201 and the second through hole 202 and the base 1. The first receiving groove is used to receive the main body of the battery cell stack 10, and the second receiving groove is used to receive the tab portion of the battery cell stack 10. The cover plate 3 is mounted on the stacking frame 2 and has a pressing part 302. The pressing part 302 can be inserted into the first receiving groove to apply pressure to the main body.

[0035] Therefore, by setting the base 1, the stacking frame 2 and the cover plate 3, the first through hole 201 and the second through hole 202 on the base 1 and the stacking frame 2 respectively define the first receiving groove and the second receiving groove. This allows the main body and the tab part of the battery cell stack 10 to be received in the first receiving groove and the second receiving groove respectively. In other words, the main body of the positive and negative electrode plates and the electrolyte layer are received in the first receiving groove, and the tabs of the positive and negative electrode plates are received in the second receiving groove.

[0036] Next, the stacked battery cell stack 10 is pressed by the pressing part 302 on the cover plate 3, so that the battery cell stack 10 forms a whole. Then, the separation of the cover plate 3, the stacking frame 2 and the base 1 facilitates the removal of the battery cell stack 10. Moreover, this assembly fixture eliminates the need for external clamps to hold the battery cell stack 10, thus avoiding damage to the battery cells. At the same time, the second receiving groove can also play a positioning role, which helps to ensure the stacking accuracy of the electrode and electrolyte layers, thereby improving the assembly efficiency and manufacturing yield of the battery cell stack 10.

[0037] Based on the above overview, for more details, please refer to... Figures 1 to 11 As shown, the battery assembly fixture of this embodiment includes a base 1, a stacking frame 2 disposed on the base 1, and a cover plate 3 disposed on the stacking frame 2. The stacking frame 2 and the base 1, as well as the cover plate 3 and the stacking frame 2, are detachable.

[0038] The first through hole 201 and the second through hole 202 on the stacked frame 2 both penetrate the stacked frame 2 along its height. Furthermore, two second through holes 202 are spaced apart corresponding to the tab portions of the cell stack 10; that is, two second through holes 202 are respectively provided for the positive tab portion and the negative tab portion of the cell stack 10. The positions of the two second through holes 202 can be, for example, as shown in the image. Figure 6 As shown, the two second through holes 202 are arranged on the same side of the first through hole 201. Of course, it is understood that the two second through holes 202 may also be arranged on opposite sides of the first through hole 201 depending on the structure of the different cell stack 10.

[0039] Combination Figures 1 to 4 ,as well as Figure 11 As shown, in some exemplary embodiments, for example, a support portion 101 protruding upwards from the base 1 is provided on the base 1. The support portion 101 can be inserted into the first through hole 201. The support portion 101 and the first through hole 201 define a first receiving groove, and the support portion 101 is used to support the main body. The provision of the support portion 101 here can provide better support for the main body of the cell stack 10, and the cooperation between the support portion 101 and the pressing portion 302 can better apply pressure to the main body, so that the electrode sheets are attached and fixed together to form an integral cell stack 10.

[0040] In a specific implementation, the aforementioned support portion 101 may include, for example, a boss protruding upward toward the base 1. This boss can be inserted into the first through hole 201 to provide better support for the main body of the positive electrode plate, the negative electrode plate, and the electrolyte layer placed in the first receiving groove.

[0041] It is worth noting that, in addition to the above-mentioned structural form, the support part 101 can also be the upper end face of the base 1. In this case, in order to ensure the positioning connection between the frame body and the base 1, for example, several insertion holes can be provided on the upper end face of the base 1, and several insertion holes can be provided on the lower end face of the frame body. Through the insertion of the insertion post and the insertion hole, the positioning connection between the frame body and the base 1 can be achieved, and it is also convenient for the frame body to be disassembled from the base 1.

[0042] In some exemplary embodiments, the fitting clearance between the support portion 101 and the first through hole 201 is between 0 mm and 0.04 mm. In specific implementations, the fitting clearance between the support portion 101 and the hole wall of the first through hole 201 is set to, for example, 0 mm, 0.01 mm, 0.02 mm, 0.03 mm, or 0.04 mm.

[0043] At this time, by limiting the fit gap between the support part 101 and the first through hole 201, it is not only conducive to the separation of the stacked frame 2 and the base 1, and easy to remove the battery cell stack 10, but also to improve the support accuracy of the main body, and avoid large displacement of the electrode or electrolyte layer during the assembly process due to excessive gap, which would affect the assembly quality of the battery cell stack 10.

[0044] In some exemplary embodiments, the height of the support portion 101 is, for example, set between 0.3cm and 1cm. In specific implementations, the height of the support portion 101, that is, the dimension extending into the first through hole, can be set to, for example, 0.3cm, 0.4cm, 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, or 1cm.

[0045] In the above, limiting the height of the support part 101 can guide the installation of the stacked frame 2 on the base 1 by using the insertion and cooperation of the support part 101 and the first through hole 201 when the frame body is installed on the base 1. It can also avoid occupying too much space in the first receiving slot due to excessive height, and it is also conducive to the assembly of battery cell stacks 10 with different thicknesses.

[0046] Combination Figure 1 ,as well as Figures 8 to 11 As shown, in some exemplary embodiments, in this embodiment, the cover plate 3 includes, for example, a cover body 301 connected to a pressing part 302, which is located on the side of the cover body 301 facing the stacked frame 2. This structure not only facilitates the fabrication and processing of the cover plate 3, but also, by utilizing the cooperation between the cover body 301 and the stacked frame 2, allows the pressing part 302 to accurately apply pressure to the main body of the cell stack 10, ensuring stability and reliability during the pressure application process.

[0047] Specifically, the outer contour of the cover body 301 is consistent with the outer contour of the frame body, and the pressing part 302 includes a boss formed on one side of the cover body 301. The outer contour of the boss is consistent with the contour of the first receiving groove, and the boss can be inserted into the first receiving groove, so that the boss is used to apply pressure to the main body of the battery cell stack 10.

[0048] It is worth noting that, in addition to adopting the structure of a connected cover body 301 and a pressing part 302, the cover plate 3 in this embodiment may also be provided with only the pressing part 302 that cooperates with the first receiving groove. This is also possible.

[0049] Based on the provision of the pressing part 302, in some exemplary embodiments, the fitting gap between the pressing part 302 and the first receiving groove is, for example, between 0 mm and 0.04 mm. In specific implementations, the fitting gap between the pressing part 302 and the wall of the first receiving groove can be set to, for example, 0 mm, 0.01 mm, 0.02 mm, 0.03 mm, or 0.04 mm.

[0050] Here, by limiting the gap between the pressing part 302 and the first receiving groove, the overall pressure effect on the main body can be improved, and the pressing part 302 can be separated from the first receiving groove, which facilitates the removal of the battery cell stack 10.

[0051] Reference Figure 1As shown, in some exemplary embodiments, the height H1 of the pressing part 302 is, for example, 0.3cm-0.5cm greater than the depth H2 of the first through hole 201. In specific implementations, this difference may be 0.3cm, 0.35cm, 0.4cm, 0.45cm, or 0.5cm. This arrangement ensures that the pressing part 302 applies sufficient pressure to the main body while avoiding an excessively large volume and weight for the cover plate 3 due to excessive height.

[0052] Additionally, refer to Figure 10 As shown, in some exemplary embodiments, an operating part 303 is provided on the cover plate 3 for operating the installation and removal of the cover plate 3. The operating part 303 facilitates the insertion and removal of the cover plate 3, that is, facilitates the installation and removal of the cover plate 3 on the stacking frame 2.

[0053] In specific implementation, the aforementioned operating part 303 includes, for example, a handle provided on the side of the cover plate 3. By operating the handle, the cover plate 3 can be easily installed onto the stacking body, and the cover plate 3 can be easily removed from the stacking frame 2.

[0054] Furthermore, in some exemplary embodiments, in this example, the base 1, stacking frame 2, and cover plate 3 are all made of stainless steel. This utilizes the excellent strength, hardness, and corrosion resistance of stainless steel to ensure structural stability and precision during the use of the fixture, contributing to the quality and consistency of battery assembly.

[0055] In practice, as a preferred embodiment, the base 1, stacking frame 2, and cover plate 3 are all made of high-strength stainless steel to further improve the structural strength of the battery assembly fixture and further enhance the structural stability and service life of the fixture.

[0056] In this embodiment of the battery assembly fixture, when in use, the stacking frame 2 is installed onto the base 1 by the insertion and engagement of the support part 101 with the first through hole 201. Then, the positive electrode, electrolyte layer and negative electrode are stacked into the stacking frame 2 in a certain order, so that the main body of the positive electrode and negative electrode and the electrolyte layer are located in the first receiving groove, and the tabs of the positive electrode and negative electrode are fixed in the corresponding second receiving groove.

[0057] After stacking, the cover plate 3 is installed on the stacking frame 2, so that the pressing part 302 is also inserted into the second through hole 202. Then, the clamp is hot-pressed under specific pressure, stability and time (e.g., hot-pressing temperature range between 50-120℃, hot-pressing pressure between 500-5000 kgf, hot-pressing time between 5-30 min) so that the stacked positive electrode, electrolyte layer and negative electrode form an integrated cell stack 10. After hot pressing is completed, the cell stack 10 can be removed by disassembling the cover plate 3 and the stacking frame 2.

[0058] It is worth noting that, regarding the battery assembly fixture of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still made by... Figures 1 to 11 As shown, it may include, for example, a base 1, a stacking frame 2 disposed on the base 1, and a cover plate 3 disposed on the stacking frame 2.

[0059] The stacking frame 2 has a first through hole 201 and a second through hole 202, which are connected. The first through hole 201 and the second through hole 202 define a first receiving groove and a second receiving groove between the first through hole 201 and the second through hole 202 and the base 1. The first receiving groove is used to receive the main body of the battery cell stack 10, and the second receiving groove is used to receive the tab portion of the battery cell stack 10. A cover plate 3 is provided on the stacking frame 2, and the cover plate 3 is provided with a pressing part 302. The pressing part 302 can be inserted into the first receiving groove to apply pressure to the main body.

[0060] The base 1 is provided with a support part 101 protruding upwards; the support part 101 can be inserted into the first through hole 201, and the support part 101 is used to support the main body.

[0061] The fitting clearance between the support portion 101 and the first through hole 201 is between 0 mm and 0.04 mm. Furthermore, the height of the support portion 101 is between 0.3 cm and 1 cm.

[0062] The cover plate 3 includes a cover body 301, and a pressing part 302 is formed on the side of the cover body facing the stacking frame 2. The fitting gap between the pressing part 302 and the first receiving groove is between 0mm and 0.04mm. The height of the pressing part 302 is 0.3cm-0.5cm greater than the depth of the first receiving groove.

[0063] The cover plate 3 is provided with an operating part 303, which is used to operate the disassembly and assembly of the cover plate 3.

[0064] The base 1, stacking frame 2, and cover plate 3 are all made of stainless steel.

[0065] In the preferred embodiments described above, the specific settings and arrangements of the base 1, stacking frame 2, cover plate 3, and the mating structures between the base 1 and the stacking body, and between the stacking body and the cover plate 3, can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the base 1, stacking frame 2, cover plate 3, and the mating structures between the base 1 and the stacking body, and between the stacking body and the cover plate 3, can also be referred to the descriptions in the above exemplary embodiments.

[0066] The battery assembly fixture in this embodiment, by adopting the above design, can not only avoid damage to the battery cells caused by traditional external fixtures, but also improve the assembly efficiency and yield of battery cell stacks.

[0067] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A battery assembly fixture for assembling a positive electrode, an electrolyte layer, and a negative electrode into a battery cell stack, characterized in that: Includes base, stacking frame, and cover plate; The stacking frame is disposed on the base, and the stacking frame has a first through hole and a second through hole that are connected through each other. The first through hole and the second through hole are connected to each other, and a first receiving groove and a second receiving groove are defined between the first through hole and the second through hole and the base. The first receiving groove is used to receive the main body part of the battery cell stack, and the second receiving groove is used to receive the electrode part of the battery cell stack. The cover plate is disposed on the stacked frame, and the cover plate is provided with a pressing part, which can be inserted into the first receiving groove to apply pressure to the main body.

2. The battery assembly fixture according to claim 1, characterized in that: The base is provided with a support portion that protrudes upward toward the base; The support portion can be inserted into the first through hole, and the support portion is used to support the main body portion.

3. The battery assembly fixture according to claim 2, characterized in that: The clearance between the support and the first through hole is between 0 mm and 0.04 mm.

4. The battery assembly fixture according to claim 2, characterized in that: The height of the support is between 0.3cm and 1cm.

5. The battery assembly fixture according to claim 1, characterized in that: The cover plate includes a cover body connected to the pressing part; The pressure-retaining part is located on the side of the cover body facing the stacked frame.

6. The battery assembly fixture according to claim 5, characterized in that: The fitting gap between the pressing part and the first receiving groove is between 0mm and 0.04mm.

7. The battery assembly fixture according to claim 5, characterized in that: The height H1 of the pressing part is 0.3cm-0.5cm greater than the depth of the first through hole H2.

8. The battery assembly fixture according to claim 1, characterized in that: The cover plate is provided with an operating part, which is used to operate the disassembly and assembly of the cover plate.

9. The battery assembly fixture according to any one of claims 1 to 8, characterized in that: The base, the stacking frame, and the cover plate are all made of stainless steel.

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