Auxiliary tool for battery

Abstract

The utility model relates to an auxiliary tool of a battery, and relates to the field of new energy batteries. The utility model provides an auxiliary tool for a battery. The auxiliary tool comprises a tool body, a bottom cover and a positioning piece, the tool body is provided with a mounting cavity and a welding opening which communicate with each other. The bottom cover is arranged at the other end of the tool body, the first end of the bottom cover faces the tool body, and a first limiting groove is formed in the second end of the bottom cover; the first end of the positioning piece is used for sequentially penetrating through the first limiting groove and the mounting cavity, so that the positioning piece penetrates through the roll core of the battery and abuts against the first collector plate, and the second end of the positioning piece is in limiting connection with the first limiting groove. By arranging the tool body and the bottom cover, the cylindrical battery is subjected to external restraint; by arranging the ejector pin, the welding part of the cylindrical battery is subjected to internal restraint; therefore, the probability of poor matching is reduced, on one hand, the production yield is improved, the consistency of the welding appearance is ensured, and on the other hand, the concentricity of the roll core and the shell after the roll core enters the shell can be ensured.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, and in particular to an auxiliary tooling for a battery. Background Art

[0002] According to the inventor's analysis based on previous process debugging, in the cylindrical battery assembly process, the positive electrode penetration welding consistency is poor, and poor welding occurs randomly. The main reason for this poor phenomenon is that the winding core after the first collector plate is welded is not well fitted with the positive electrode column inside the shell, resulting in random poor welding results. Poor welding of cylindrical batteries may have a certain degree of impact on subsequent battery performance, and may lead to poor performance of subsequent winding cores, which will result in a high defect rate during production, a large number of scrapped materials, affecting production efficiency, and wasting production resources. Utility Model Content

[0003] The utility model aims to provide an auxiliary tooling for a battery, which can reduce the probability of poor matching, improve the production yield, ensure the consistency of welding appearance, and ensure the concentricity of the winding core and the shell after the shell is inserted.

[0004] The embodiment of the utility model is achieved as follows:

[0005] The utility model proposes an auxiliary tooling of a battery, comprising a tooling body, a bottom cover and a positioning piece; the tooling body is provided with a connected installation cavity and a welding port, the installation cavity is used to accommodate the battery, the welding port is arranged at one end of the tooling body and is used to pass the pole of the battery; the bottom cover is arranged at the other end of the tooling body, the first end of the bottom cover faces the tooling body, and the second end of the bottom cover is provided with a first limiting groove; the first end of the positioning piece is used to sequentially penetrate the first limiting groove and the installation cavity, so that the positioning piece penetrates the winding core of the battery and abuts against the first collecting disk, and the second end of the positioning piece is limitedly connected to the first limiting groove.

[0006] Optionally, the positioning member includes a positioning body and a positioning column connected to each other, the positioning body is connected to the first limiting groove in a limiting manner, and the positioning column is used to pass through the first limiting groove and the installation cavity in sequence.

[0007] Optionally, the first limiting groove, the mounting cavity and the welding port are coaxially arranged.

[0008] Optionally, the tool body comprises a top cover and a limiting member, wherein the top cover is arranged at one end of the limiting member, and the bottom cover is arranged at the other end;

[0009] The limiting member is provided with a through cavity, and the through cavity forms the installation cavity;

[0010] The top cover is provided with the welding port, and the bottom surface of the top cover abuts against the top surface of the battery.

[0011] Optionally, the top cover, the limiting member and the bottom cover are fixed by screws.

[0012] Optionally, the limiting member is an integrally formed structure; or

[0013] The limiting member includes a first restraining member and a second restraining member, the first restraining member is provided with a first restraining cavity, the second restraining member is provided with a second restraining cavity, the first restraining cavity and the second restraining cavity form the through cavity and are used to cooperatively clamp the battery.

[0014] Optionally, the first restraint member is provided with a first window communicating with the first restraint cavity;

[0015] The second restraint member is provided with a second window communicating with the second restraint cavity.

[0016] Optionally, the first end of the bottom cover is provided with a second limiting groove coaxially arranged with the installation cavity.

[0017] Optionally, a boss is provided at the first end of the bottom cover, and a top wall of the boss is used to abut against a second current collecting plate provided at the bottom of the battery;

[0018] The side wall of the boss is used to abut against the inner wall of the battery shell, and the inner wall of the mounting cavity is used to abut against the outer wall of the battery shell.

[0019] Optionally, an annular groove is provided on the top surface of the boss, and the annular groove is used for being matched and connected with the second current collecting plate of the battery.

[0020] The beneficial effects of the embodiments of the utility model are:

[0021] The utility model proposes an auxiliary tooling for a battery, which externally restrains a cylindrical battery by arranging a tooling body and a bottom cover; and internally restrains a welding part of the cylindrical battery by arranging a ejector pin; such an arrangement reduces the probability of poor matching, which on the one hand improves the production yield and ensures the consistency of the welding appearance, and on the other hand ensures the concentricity of the winding core and the shell after being put into the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the auxiliary tooling of the embodiment of the utility model;

[0024] Figure 2 A cross-sectional view of a cylindrical battery to be assembled according to an embodiment of the utility model;

[0025] Figure 3 A cross-sectional view of the auxiliary tooling of the embodiment of the utility model;

[0026] Figure 4 A cross-sectional view of a cylindrical battery according to an embodiment of the utility model being loaded into an auxiliary tooling;

[0027] Figure 5 for Figure 4 A partial schematic diagram of the middle part;

[0028] Figure 6 for Figure 4 A partial schematic diagram of B in the middle;

[0029] Figure 7 This is an exploded view of a cylindrical battery and auxiliary tooling according to an embodiment of the utility model.

[0030] Icons: 010-auxiliary tooling; 100-positioning piece; 110-positioning body; 120-positioning column; 200-bottom cover; 210-first limiting groove; 220-second limiting groove; 230-boss; 231-annular groove; 300-tooling body; 310-installation cavity; 320-welding port; 330-top cover; 340-positioning piece; 341-first restraining piece; 3411-first restraining cavity; 3412-first window; 342-second restraining piece; 3421-second restraining cavity; 3422-second window; 400-bolt; 500-nut; 020-cylindrical battery; 021-housing; 022-pole; 023-winding core; 0231-through hole; 024-first current collecting plate; 025-second current collecting plate; DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] According to the analysis of the previous process debugging, the inventor found that the consistency of the positive electrode penetration welding is poor, and welding defects occur randomly. The main reason for this defect is that the winding core 023 after welding the first current collecting disk 024 and the positive electrode column 022 inside the shell 021 are not well fitted, resulting in random poor welding results.

[0038] At present, in the assembly process of cylindrical battery 020, the existing positive pole 022 + positive collector plate penetration welding tooling mainly constrains welding from the outside of the core 023, but not from the inside. Because the collector plate material is too soft and there is a tolerance in the JR height, it may cause: ① The positive pole 022 and the collector plate are over-matched, resulting in a depression in the center of the collector plate and a large bulge in the welding appearance; ② There is a matching gap between the positive pole 022 and the collector plate, resulting in a cold weld and falling off after welding. Therefore, in the case of positive electrode penetration welding without internal constraints, there is a problem that the internal collector plate and the positive pole 022 of the shell 021 do not match well, resulting in cold welds and welding penetration, and the inside cannot be observed, which may lead to poor performance of the subsequent core 023 and a high production defect rate in the process.

[0039] At the same time, poor welding of cylindrical battery 020 may have a certain degree of impact on the subsequent battery performance, and may cause poor performance of subsequent winding core 023, which will result in a high defect rate during production and a large amount of scrapped materials, affecting production efficiency and wasting production resources.

[0040] Therefore, the utility model proposes a battery auxiliary tooling 010 for assisting in welding cylindrical batteries 020, performing external restraint on the cylindrical batteries 020, and increasing the internal restraint on the winding core 023; on the one hand, it can improve the production yield and ensure the consistency of the welding appearance; on the other hand, it can ensure the concentricity of the winding core 023 and the shell 021 after the winding core 023 is inserted into the shell.

[0041] Of course, in an optional embodiment, the auxiliary tooling 010 can also be used for welding square batteries.

[0042] In this embodiment, please refer to Figure 2 The cylindrical battery 020 that needs to be penetrated and welded includes a shell 021, a pole 022, a winding core 023, a first current collecting disc 024 and a second current collecting disc 025; the shell 021 is provided with a cavity for accommodating other components, and the pole 022 is inserted into the top of the shell 021; the first current collecting disc 024 is installed and fits with the inner top wall of the shell 021; the winding core 023 is installed in the shell 021 and the positive pole ear is directed toward the first current collecting disc 024; the second current collecting disc 025 is installed in the shell 021 and fits with the negative pole ear of the winding core 023.

[0043] The winding core 023 is formed by winding the positive electrode foil, the separator and the negative electrode foil in sequence, so the winding core 023 has a through hole 0231 inside.

[0044] Among them, the first current collecting disc 024 is a positive electrode current collecting disc, and the second current collecting disc 025 is a negative electrode current collecting disc.

[0045] It can be understood that after the cylindrical battery 020 to be assembled is loaded into the auxiliary tooling 010 for penetration welding, it is taken out and the bottom shell is welded on the bottom of the shell 021, and then the cylindrical battery 020 is assembled.

[0046] Please refer to Figure 1 The utility model proposes an auxiliary tooling 010 of a battery, comprising a tooling body 300, a bottom cover 200 and a positioning member 100; the tooling body 300 is provided with a connecting mounting cavity 310 and a welding port 320, the mounting cavity 310 is used to accommodate the battery, the welding port 320 is arranged at one end of the tooling body 300 and is used to pass the pole 022 of the battery; the bottom cover 200 is arranged at the other end of the tooling body 300, the first end of the bottom cover 200 faces the tooling body 300, and the second end of the bottom cover 200 is provided with a first limiting groove 210; the first end of the positioning member 100 is used to sequentially penetrate the first limiting groove 210 and the mounting cavity 310, so that the positioning member 100 penetrates the winding core 023 of the battery and abuts against the first collecting plate 024, and the second end of the positioning member 100 is limitedly connected with the first limiting groove 210.

[0047] Among them, the cylindrical battery 020 to be assembled is loaded into the installation cavity 310 of the tooling body 300 so that the welding port 320 is exposed at the end of the pole 022 of the cylindrical battery 020, and the bottom cover 200 is connected to the tooling body 300 to externally restrain the cylindrical battery 020; finally, the positioning member 100 is passed through the first limiting groove 210 and the installation cavity 310 in sequence, and the positioning member 100 passes through the through hole 0231 of the winding core 023 and abuts against the bottom wall of the first collecting plate 024, so as to internally restrain the welding part inside the cylindrical battery 020.

[0048] It can be understood that by providing the tooling body 300 and the bottom cover 200, the cylindrical battery 020 is externally restrained; by providing the ejector pin, the welding part of the cylindrical battery 020 is internally restrained; this arrangement reduces the probability of poor matching, on the one hand, improves the production yield and ensures the consistency of the welding appearance, and on the other hand, it can ensure the concentricity of the core 023 and the shell 021 after being inserted into the shell.

[0049] Please refer to Figure 1 and Figure 3 In this embodiment, the auxiliary tooling 010 includes a positioning member 100 .

[0050] In this embodiment, the positioning member 100 includes a positioning body 110 and a positioning column 120 connected to each other; Figure 3 and Figure 4 , the positioning body 110 and the first limiting groove 210 are matched in shape, and the positioning body 110 and the first limiting groove 210 are limitedly connected; please refer to Figure 3-Figure 5One end of the positioning column 120 is connected to the positioning body 110, and the other end is used to pass through the first limiting groove 210 and the installation cavity 310 in sequence, so that the positioning column 120 can pass through the battery winding core 023 and make the end face of the positioning column 120 abut against the first collecting plate 024.

[0051] It can be understood that the positioning column 120 passes through the through hole 0231 of the winding core 023 to ensure the concentricity between the winding core 023 and the shell 021 after the winding core 023 is inserted into the shell; please refer to Figure 3-Figure 5 The end surface of the positioning column 120 abuts against the first current collecting disk 024 to make the first current collecting disk 024 and the pole 022 completely fit together, thereby increasing the fit between the two, avoiding the center of the first current collecting disk 024 from being concave, and avoiding the situation of cold welding and desoldering due to the existence of a matching gap between the pole 022 and the first current collecting disk 024; the positioning piece 100 set in this way can internally restrain the cylindrical battery 020 to avoid abnormal welding caused by heat influence during welding or poor assembly.

[0052] Please refer to Figure 7 In this embodiment, the auxiliary tooling 010 includes a bottom cover 200 .

[0053] In this embodiment, please refer to Figure 3 The bottom cover 200 is disposed at the other end of the tooling body 300 , the first end of the bottom cover 200 faces the tooling body 300 , and the second end of the bottom cover 200 is provided with a first limiting groove 210 .

[0054] Optionally, the bottom cover 200 is a disc structure, please refer to Figure 3 and Figure 7 The first end of the bottom cover 200 is provided with a boss 230, and the top wall of the boss 230 is used to abut against the second current collecting plate 025 disposed at the bottom of the battery; please refer to Figure 6 The side wall of the boss 230 is used to abut against the inner wall of the battery shell 021, and the inner wall of the mounting cavity 310 is used to abut against the outer wall of the battery shell 021.

[0055] It can be understood that the bottom cover 200 with the boss 230 can further cooperate with the first restraining member 341 and the second restraining member 342 of the tooling body 300 to externally restrain and position the cylindrical battery 020 .

[0056] Please refer to Figure 3 and Figure 4 The top surface of the boss 230 is provided with an annular groove 231, which is used to cooperate with the second current collecting plate 025 of the battery. Since the bottom of the second current collecting plate 025 is raised, the annular groove 231 avoids the bottom raised of the second current collecting plate 025.

[0057] Optionally, see Figure 3 and Figure 4The first end of the bottom cover 200 is provided with a second limiting groove 220 coaxially arranged with the mounting cavity 310. The second limiting groove 220 is arranged on the boss 230. When the auxiliary tool 010 welds the second current collecting plate 025, the second limiting groove 220 is used to avoid the pole 022 part.

[0058] Please refer to Figure 3 The boss 230, the first limiting groove 210 and the second limiting groove 220 are all coaxially arranged with the center point of the bottom cover 200 as the axis.

[0059] In this embodiment, the auxiliary tooling 010 includes a tooling body 300 .

[0060] In this embodiment, the tool body 300 is provided with a connecting installation cavity 310 and a welding port 320 . The installation cavity 310 is used to accommodate the battery. The welding port 320 is provided at one end of the tool body 300 and is used to pass the battery pole 022 .

[0061] In this embodiment, please refer to Figure 1 The tool body 300 includes a split top cover 330 and a stopper 340. Of course, in other embodiments, the tool body 300 may also be an integrally formed structural member.

[0062] In this embodiment, a top cover 330 is provided at one end of the limiting member 340, and a bottom cover 200 is provided at the other end; the limiting member 340 is provided with a through cavity, and the through cavity forms an installation cavity 310; the top cover 330 is provided with a welding port 320, and the bottom surface of the top cover 330 abuts against the top surface of the battery.

[0063] Please refer to Figure 3 and Figure 4 The diameter of the welding opening 320 gradually decreases from the top surface to the bottom surface of the top cover 330 to form an inverted trapezoidal vertical section. The diameter of the welding opening 320 is selected according to the welding area of ​​the pole 022 of the cylindrical battery 020. The first limiting groove 210, the installation cavity 310 and the welding opening 320 are coaxially arranged with the center of the installation cavity 310 as the axis.

[0064] It can be understood that, after the cylindrical battery 020 is installed into the fixed top cover 330 and the limiter 340, the pole 022 extends out of the welding port 320, the top surface of the shell 021 of the cylindrical battery 020 abuts against the bottom surface of the top cover 330, and the outer wall of the shell 021 fits against the installation cavity 310, thereby cooperating with the bottom cover 200 to externally constrain the cylindrical battery 020.

[0065] Optionally, see Figure 3-Figure 4 and Figure 7The limiting member 340 includes a first restraining member 341 and a second restraining member 342. The first restraining member 341 is provided with a first restraining cavity 3411, and the second restraining member 342 is provided with a second restraining cavity 3421. The first restraining cavity 3411 and the second restraining cavity 3421 form a through cavity and are used to cooperate in clamping the battery.

[0066] Please refer to Figure 7 A first restraint cavity 3411 is provided on one side wall of the first restraint member 341. The cross section of the first restraint cavity 3411 is an arc structure and matches with the outer wall of the shell 021 of the cylindrical battery 020. A first window 3412 communicating with the first restraint cavity 3411 is provided on the other side wall of the first restraint member 341. Similarly, a second restraint cavity 3421 is provided on one side wall of the second restraint member 342. The cross section of the second restraint cavity 3421 is an arc structure and matches with the outer wall of the shell 021 of the cylindrical battery 020. A second window 3422 communicating with the second restraint cavity 3421 is provided on the other side wall of the second restraint member 342.

[0067] It can be understood that the first restraint member 341 and the second restraint member 342 cooperate to clamp the cylindrical battery 020, so that it can be used to clamp cylindrical batteries 020 of different diameters, with better adaptability and a wider range of applications.

[0068] Of course, in other embodiments, the limiting member 340 may be an integrally formed structural member.

[0069] In this embodiment, the top cover 330, the limiting member 340 and the bottom cover 200 are fixed by screws.

[0070] In this embodiment, please refer to Figure 7 The threaded parts include bolts 400 and nuts 500. A plurality of mounting holes penetrating the bodies of the top cover 330, the bottom cover 200, the first restraint 341 and the second restraint 342 can be adaptively prepared. The top cover 330 and the first restraint 341 and the second restraint 342 are fixed by bolts 400, and the bottom cover 200 and the first restraint 341 and the second restraint 342 are fixed by nuts 500.

[0071] Of course, in other embodiments, fixed connection can also be achieved by means of snap connection or the like.

[0072] The welding working principle of the auxiliary tooling 010 of the battery proposed in this embodiment is:

[0073] S1: Assemble the shell 021, the pole 022, the winding core 023, the first current collecting plate 024 and the second current collecting plate 025 into a cylindrical battery 020 to be assembled.

[0074] S2: Fix the first restraint member 341 and the second restraint member 342 on the bottom cover 200 ; after fixation, a gap is reserved between the inner wall of the first restraint member 341 and the inner wall of the second restraint member 342 and the side wall of the boss 230 on the bottom cover 200 , and the gap is used to position the shell 021 .

[0075] S3: Install the cylindrical battery 020 to be assembled, so that the inner wall of the shell 021 abuts against the side wall of the boss 230, the outer wall of the shell 021 abuts against the inner wall of the first restraint 341 and the inner wall of the second restraint 342, and the second collecting plate 025 is installed and abutted against the lower wall of the boss 230.

[0076] S4: Place the top cover 330, fix the top cover 330 to the first restraint 341 and the second restraint 342 by bolts 400, and fix the bottom cover 200 to the first restraint 341 and the second restraint 342 by nuts 500; thereby achieving external restraint of the cylindrical battery 020.

[0077] S5: Insert the positioning column 120 of the positioning member 100 into the positioning body 110 from the bottom cover 200 end, and the positioning column 120 pushes into the winding core 023 through the through hole 0231 inside the winding core 023 and abuts against the bottom end of the first collecting plate 024; the positioning column 120 is completely assembled into the winding core 023, and the positioning body 110 cooperates with the first limiting groove 210 to limit; thereby realizing the internal restraint of the cylindrical battery 020.

[0078] S6: placing the auxiliary tool 010 on the laser workbench to perform laser welding on the pole 022 and the first current collecting plate 024 from the welding opening 320 .

[0079] S7: After welding is completed, remove the auxiliary tooling 010 in reverse order of assembly to take out the cylindrical battery 020.

[0080] In summary, the utility model proposes an auxiliary tooling 010 for a battery, which externally restrains the cylindrical battery 020 by setting a tooling body 300 and a bottom cover 200; and internally restrains the welding part of the cylindrical battery 020 by setting a ejector pin; this arrangement reduces the probability of poor fitting, and on the one hand improves the production yield and ensures the consistency of the welding appearance, and on the other hand ensures the concentricity of the winding core 023 and the shell 021 after being inserted into the shell.

[0081] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery auxiliary tooling, characterized in that: include: A tool body, wherein the tool body is provided with a connecting mounting cavity and a welding port, wherein the mounting cavity is used to accommodate a battery, and the welding port is provided at one end of the tool body and is used to pass a pole of the battery; A bottom cover, the bottom cover is arranged at the other end of the tool body, the first end of the bottom cover faces the tool body, and the second end of the bottom cover is provided with a first limiting groove; A positioning member, wherein the first end of the positioning member is used to sequentially penetrate the first limiting groove and the mounting cavity, so that the positioning member penetrates the winding core of the battery and abuts against the first collecting disk, and the second end of the positioning member is limitedly connected to the first limiting groove.

2. The auxiliary tooling for the battery according to claim 1, characterized in that: The positioning member includes a positioning body and a positioning column connected to each other. The positioning body is connected to the first limiting groove in a limiting manner. The positioning column is used to pass through the first limiting groove and the installation cavity in sequence.

3. The auxiliary tooling for the battery according to claim 1, characterized in that: The first limiting groove, the mounting cavity and the welding port are coaxially arranged.

4. The auxiliary tooling for the battery according to claim 1, characterized in that: The tool body comprises a top cover and a limiting member, wherein the top cover is arranged at one end of the limiting member and the bottom cover is arranged at the other end; The limiting member is provided with a through cavity, and the through cavity forms the installation cavity; The top cover is provided with the welding port, and the bottom surface of the top cover abuts against the top surface of the battery.

5. The auxiliary tooling for the battery according to claim 4, characterized in that: The top cover, the limiting member and the bottom cover are fixed by screw members.

6. The auxiliary tooling for the battery according to claim 4, characterized in that: The limiting member is an integrally formed structure; or The limiting member includes a first restraining member and a second restraining member, the first restraining member is provided with a first restraining cavity, the second restraining member is provided with a second restraining cavity, the first restraining cavity and the second restraining cavity form the through cavity and are used to cooperatively clamp the battery.

7. The auxiliary tooling for the battery according to claim 6, characterized in that: The first restraint member is provided with a first window communicating with the first restraint cavity; The second restraint member is provided with a second window communicating with the second restraint cavity.

8. The auxiliary tooling for the battery according to claim 1, characterized in that: The first end of the bottom cover is provided with a second limiting groove coaxially arranged with the installation cavity.

9. The auxiliary tooling for the battery according to claim 1, characterized in that: A boss is provided at the first end of the bottom cover, and a top wall of the boss is used to abut against a second current collecting plate provided at the bottom of the battery; The side wall of the boss is used to abut against the inner wall of the battery shell, and the inner wall of the mounting cavity is used to abut against the outer wall of the battery shell.

10. The auxiliary tooling for the battery according to claim 9, characterized in that: The top surface of the boss is provided with an annular groove, and the annular groove is used for matching and connecting with the second current collecting plate of the battery.

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