Battery pack welding tool

Abstract

The utility model relates to the technical field of welding tools, in particular to a battery pack welding tool which comprises a tool base, a welding fixing plate and a plurality of guide connecting columns, a sleeving opening consistent with an external battery shell in shape is formed in the tool base, and the tool base can be connected to the periphery of the battery shell in a sleeving mode through the sleeving opening. A plurality of mounting grooves are formed in the middle of the welding fixing plate, limiting inclined blocks protruding inwards are arranged on the side walls of the mounting grooves, elastic reset pieces are arranged in the middles of the guide connecting columns, and the corners of the welding fixing plate are movably connected with the middles of the guide connecting columns through the elastic reset pieces. The welding fixing plate above the tool base can enable the mounting grooves with the connecting pieces to accurately abut against the top of the battery pole, the accuracy of the welding positions of the connecting pieces and the battery pole is improved, and meanwhile the tool base can press the multiple connecting pieces on the top of the battery pole through the limiting inclined blocks in the mounting grooves. By adopting the battery pack welding tool, the welding efficiency of the connecting piece is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding tooling, in particular to a battery pack welding tooling. Background Art

[0002] A battery module is a battery combination in which battery cells are connected in series, parallel or series-parallel, and there is only a pair of positive and negative output terminals. It preferably further includes components such as a housing, a management and protection device, etc. Connecting multiple batteries in series, connecting the single cells in series forms a battery stack. The voltage of the battery stack is the sum of the voltages of multiple batteries. The traditional metal-air battery stack adopts a bipolar plate stacking structure. The battery stack module is various devices that make up the battery stack to ensure the normal working supply voltage of the battery stack.

[0003] According to the Chinese utility model patent with the existing publication number CN214848824U, a battery module is described. The battery module includes a battery module main body, two end plates and a plurality of fixing straps; the end plates are arranged at both ends in the length direction of the battery module main body; the fixing straps are sleeved outside the two end plates, and the two end plates clamp the battery module main body; and a plurality of the fixing straps pass above and below the battery module main body.

[0004] A connecting piece is further included in a conventional battery module. The connecting piece is used to connect the positive and negative electrodes of adjacent battery cells to each other. In the conventional connection method between the connecting piece and the battery terminal post, it is fixed by welding. Therefore, in view of these current situations, it is urgent to develop a battery pack welding tooling to meet the actual use needs. Summary of the Invention

[0005] The purpose of the utility model is to provide a battery pack welding tooling, which is used to solve the technical problems that when welding the connecting piece, the positions of the connecting piece and the battery terminal post cannot be kept at the same horizontal position, and the welding method that requires manual fixing of the connecting piece on the battery terminal post cannot realize the simultaneous welding of multiple connecting pieces and battery terminal posts.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The battery pack welding tooling includes a tooling base, a welding fixing plate, and several guiding connecting columns. An inner socket opening with a shape consistent with that of the external battery housing is provided inside the tooling base. The tooling base can be socketed around the battery housing through the socket opening. Several installation slots are provided in the middle of the welding fixing plate, and the installation slots penetrate through the top and bottom end faces of the welding fixing plate. The side wall of the installation slot is provided with a limiting inclined block that can expand and contract towards the inner wall of the installation slot. The several guiding connecting columns are respectively vertically arranged at the corners of the tooling base, and an elastic resetting member is provided in the middle of the guiding connecting column. The corners of the welding fixing plate are movably connected to the middle of the guiding connecting column through the elastic resetting member. The installation slots are arranged above the socket opening, and the welding fixing plate abuts against the top end face of the tooling base through the elastic resetting member.

[0008] In the above description, as a further solution, a limiting sleeve is provided at the top of the guiding connecting column. The limiting sleeve is a cylindrical hollow structure, and the limiting sleeve passes through the bottom end of the guiding connecting column and is socketed and fixed at the top end of the guiding connecting column.

[0009] In the above description, as a further solution, a threaded fixing pin is provided at the top of the guiding connecting column. The top of the threaded fixing pin is a threaded hole, and the bottom of the threaded fixing pin is a threaded part. The bottom end of the guiding connecting column passes through the welding fixing plate and is threadedly connected to the threaded hole, and the threaded fixing pin is threadedly connected to the corner of the tooling base through the threaded part.

[0010] In the above description, as a further solution, the elastic resetting member is composed of a reset spring. The reset spring is socketed in the middle of the guiding connecting column, and one end of the reset spring abuts against the bottom end of the limiting sleeve, and the other end of the reset spring abuts against the top end face of the welding fixing plate.

[0011] In the above description, as a further solution, a horizontally arranged embedded groove is provided on the inner wall of the installation slot. A spring pin is provided at the top of the limiting inclined block. The limiting inclined block is movably connected inside the embedded groove through the spring pin. The limiting inclined block can swing around the spring pin as the axis, and the limiting inclined block can extend to the inner wall of the installation slot through the spring pin.

[0012] In the above description, as a further solution, the end face of the limiting inclined block close to the installation slot is an inclined surface that slopes downward.

[0013] In the above description, as a further solution, a pole piece fixing plate is provided on the top end face of the welding fixing plate. The installation slots are provided in the middle of the pole piece fixing plate, and the pole piece fixing plate and the welding fixing plate are of a split structure. Both ends of the pole piece fixing plate are fixedly connected to the top end face of the welding fixing plate through bolts.

[0014] The beneficial effects produced by the present utility model are as follows:

[0015] The battery pack welding tooling of the present application is provided with a number of socket openings inside the tooling base, through which the tooling base can be socketed on the surface of the battery housing through the socket openings to position the battery housing. At the same time, the welding fixing plate located above the tooling base can accurately abut the mounting groove with the connecting piece against the top of the battery pole column, improving the accuracy of the welding position between the connecting piece and the battery pole column. At the same time, the tooling base can press multiple connecting pieces against the top of the battery pole column through the limiting inclined block inside the mounting groove. The use of the battery pack welding tooling improves the welding efficiency of the connecting piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the battery pack welding tooling described in the present utility model;

[0017] Figure 2 is a structural schematic diagram of the battery pack welding tooling described in the present utility model from a top view angle;

[0018] Figure 3 is Figure 2 a cross-sectional structural schematic diagram along the A-A direction in

[0019] Figure 4 is Figure 2 a cross-sectional structural schematic diagram along the B-B direction in

[0020] Figure 5 is Figure 4 a partial enlarged structural schematic diagram of C in

[0021] Figure 6 is a structural schematic diagram of the battery pack welding tooling described in the present utility model in a working state. In the figure: 1 - tooling base, 11 - socket opening, 2 - welding fixing plate, 3 - guiding connection column, 31 - limiting sleeve, 32 - threaded fixing pin, 321 - threaded hole, 322 - threaded part, 33 - return spring, 4 - pole piece fixing plate, 41 - mounting groove, 42 - limiting inclined block, 421 - inclined surface, 422 - spring pin, 43 - embedded groove, 5 - bolt, 6 - connecting piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] For the convenience of understanding by those skilled in the art, the present utility model will be further described below in conjunction with the embodiments and the drawings. The content mentioned in the embodiments does not limit the present utility model. The present utility model will be described in detail below in conjunction with the drawings.

[0023] Please refer to Figures 1-6, the battery pack welding tooling for its specific implementation includes a tooling base 1, a welding fixing plate 2 and several guiding connection columns 3. An inner socket opening 11 with a shape consistent with that of the external battery housing is provided inside the tooling base 1. The tooling base 1 can be socketed around the battery housing through the socket opening 11. Several mounting grooves 41 are provided in the middle of the welding fixing plate 2. The mounting grooves 41 penetrate through the top and bottom end faces of the welding fixing plate 2. The side wall of the mounting groove 41 is provided with an inwardly protruding limiting inclined block 42. The limiting inclined block 42 can expand and contract towards the inner wall of the mounting groove 41. Several guiding connection columns 3 are respectively vertically arranged at the corners of the tooling base 1. An elastic reset member is provided in the middle of the guiding connection column 3. The corners of the welding fixing plate 2 are movably connected to the middle of the guiding connection column 3 through the elastic reset member. The mounting groove 41 is arranged above the socket opening 11. The welding fixing plate 2 abuts against the top end face of the tooling base 1 through the elastic reset member.

[0024] Since several socket openings 11 are provided inside the tooling base 1, the tooling base 1 can be socketed on the surface of the battery housing through the socket openings 11 to position the battery housing. At the same time, the welding fixing plate 2 located above the tooling base 1 can accurately abut the mounting groove 41 with the connecting piece 6 against the top of the battery pole. This improves the accuracy of the welding position between the connecting piece 6 and the battery pole. At the same time, the tooling base 1 can press multiple connecting pieces 6 against the top of the battery pole through the limiting inclined block 42 inside the mounting groove 41. The use of the battery pack welding tooling improves the welding efficiency of the connecting piece 6.

[0025] Among them, the specific structure of the guiding connection column 3 is as Figure 3 shown. A limiting sleeve 31 is provided at the top of the guiding connection column 3. The limiting sleeve 31 is a cylindrical hollow structure. The limiting sleeve 31 passes through the bottom end of the guiding connection column 3 and is socketed and fixed at the top end of the guiding connection column 3. A threaded fixing pin 32 is provided at the top of the guiding connection column 3. The top of the threaded fixing pin 32 is a threaded hole 321, and the bottom of the threaded fixing pin 32 is a threaded part 322. The bottom end of the guiding connection column 3 passes through the welding fixing plate 2 and is threadedly connected to the threaded hole 321. The threaded fixing pin 32 is threadedly connected to the corner of the tooling base 1 through the threaded part 322. The elastic reset member is composed of a reset spring 33. The reset spring 33 is sleeved in the middle of the guiding connection column 3, and one end of the reset spring 33 abuts against the bottom end of the limiting sleeve 31, and the other end of the reset spring 33 abuts against the top end face of the welding fixing plate 2.

[0026] When the tooling base 1 is sleeved onto the top of the battery, the tooling base 1 can be sleeved along the side wall of the battery shell through the sleeve opening 11. The sleeve opening 11 is tightly fitted with the battery shell to ensure that the battery pole can be located directly below the mounting groove 41. At the same time, when the top of the battery shell contacts the bottom end surface of the welding fixing plate 2, the tooling base 1 can be pressed downward to continue moving. Since the reset spring 33 is squeezed between the limiting sleeve 31 and the welding fixing plate 2, the reset spring 33 provides a continuous downward thrust to the welding fixing plate 2, and the welding fixing plate 2 can firmly fix the connecting piece 6 located at the bottom of the limiting inclined block 42 on the top end surface of the battery pole.

[0027] The structure between the limiting inclined block 42 and the mounting groove 41 is as follows: Figures 4-5 As shown, the inner wall of the mounting groove 41 is provided with a horizontally arranged embedded groove 43, and the top of the limiting bevel block 42 is provided with a spring pin 422. The limiting bevel block 42 is movably connected to the inside of the embedded groove 43 through the spring pin 422. The limiting bevel block 42 can swing along the spring pin 422 as the axis. The limiting bevel block 42 can extend to the inner wall of the mounting groove 41 through the spring pin 422, and the end face of the limiting bevel block 42 close to the mounting groove 41 is a downwardly inclined inclined surface 421.

[0028] When the tooling base 1 is sleeved on the top of the battery housing and the position of the mounting groove 41 is consistent with the position of the battery pole, the connecting piece 6 can be placed inside the mounting groove 41, and by pressing the connecting piece 6, the connecting piece 6 shrinks the limiting inclined block 42 toward the inside of the embedded groove 43 along the inclined surface 421, as shown in FIG. Figure 6 As shown, after the connecting piece 6 abuts against the top end surface of the battery pole, the limiting bevel 42 can be extended and reset to the inside of the mounting groove 41 through the spring pin 422, and the connecting piece 6 can be located between the battery pole and the bottom end surface of the limiting bevel 42 to form an upper and lower limiting structure.

[0029] In a further solution, a pole piece fixing plate 4 is provided on the top surface of the welding fixing plate 2, a mounting groove 41 is provided in the middle of the pole piece fixing plate 4, and the pole piece fixing plate 4 and the welding fixing plate 2 are in a split structure, and both ends of the pole piece fixing plate 4 are fixedly connected to the top surface of the welding fixing plate 2 by bolts 5. By loosening the bolts 5, the pole piece fixing plate 4 with the mounting groove 41 of different sizes can be unloaded and replaced, so that the battery pack welding tooling can be adapted to lithium batteries of different sizes and different pole positions.

[0030] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model is disclosed above in the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art, without departing from the scope of the technical solution of the present utility model, when making some changes or modifications using the above-disclosed technical content to equivalent embodiments of equivalent changes, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical means of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. Battery pack welding tooling, characterized in that: include: A tooling base, wherein the tooling base has a sleeve opening in the same shape as the external battery shell, and the tooling base can be sleeved on the periphery of the battery shell through the sleeve opening; A welding fixing plate, wherein a plurality of mounting grooves are provided in the middle of the welding fixing plate, the mounting grooves penetrate the top end surface and the bottom end surface of the welding fixing plate, and the side walls of the mounting grooves are provided with inwardly protruding limiting inclined blocks, which can be extended and retracted toward the inner wall of the mounting groove; A plurality of guide connection columns are respectively vertically arranged at the corners of the tooling base, an elastic reset piece is provided in the middle of the guide connection column, the corners of the welding fixing plate are movably connected with the middle of the guide connection column through the elastic reset piece, the mounting groove is arranged above the sleeve opening, and the welding fixing plate abuts against the top surface of the tooling base through the elastic reset piece.

2. The battery pack welding tool according to claim 1, characterized in that: A limiting sleeve is arranged on the top of the guide connecting column. The limiting sleeve is a cylindrical hollow structure. The limiting sleeve passes through the bottom end of the guide connecting column and is sleeved and fixed on the top end of the guide connecting column.

3. The battery pack welding tool according to claim 2, characterized in that: A threaded fixing pin is provided at the top of the guide connecting column, the top of the threaded fixing pin is a threaded hole, the bottom of the threaded fixing pin is a threaded portion, the bottom end of the guide connecting column passes through the welding fixing plate and is threadedly connected to the threaded hole, and the threaded fixing pin is threadedly connected to the corner of the tooling base through the threaded portion.

4. The battery pack welding tool according to claim 3, characterized in that: The elastic reset member is composed of a reset spring, which is sleeved on the middle part of the guide connecting column, and one end of the reset spring contacts the bottom end of the limiting sleeve, and the other end of the reset spring contacts the top end surface of the welding fixing plate.

5. The battery pack welding tool according to claim 1, characterized in that: The inner wall of the installation groove is provided with a horizontally arranged embedded groove, and a spring pin is provided on the top of the limiting bevel block. The limiting bevel block is movably connected to the inside of the embedded groove through the spring pin. The limiting bevel block can swing along the spring pin as the axis, and the limiting bevel block can extend to the inner wall of the installation groove through the spring pin.

6. The battery pack welding tool according to claim 5, characterized in that: The end surface of the limiting inclined block close to the installation groove is a downwardly inclined surface.

7. The battery pack welding tool according to any one of claims 1 to 6, characterized in that: The top surface of the welding fixing plate is provided with a pole piece fixing plate, the mounting groove is opened in the middle of the pole piece fixing plate, and the pole piece fixing plate and the welding fixing plate are a split structure, and the two ends of the pole piece fixing plate are fixedly connected to the top surface of the welding fixing plate by bolts.

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