A welding tool for busbar

Abstract

The utility model discloses a welding tool for a busbar, comprising a mounting seat and a cover plate, wherein the upper end of the mounting seat is provided with a mounting groove and positioning grooves located at the front and rear sides of the mounting groove, two soft-pack battery cells are stacked and placed in the mounting groove, the pole ears of the soft-pack battery cells extend into the positioning grooves located on the same side, a D-shaped busbar is placed in the positioning groove, the D-shaped busbar is located between the two pole ears in the same positioning groove, the cover plate covers the notch of the mounting groove and the notch of the positioning groove, a first through hole connected to the positioning groove is provided on the cover plate, and a second through hole connected to the positioning groove is provided at the lower end of the mounting seat; the advantage is that the D-shaped busbar and the soft-pack battery cell can be positioned, so as to facilitate welding operations.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery module processing, in particular to a welding tool for a busbar. Background Art

[0002] Soft-pack battery modules have been widely used in various fields such as new energy vehicles and electronic equipment due to their advantages of high energy density, high safety and long life. The existing soft-pack battery module includes multiple soft-pack battery cells, plastic brackets, busbars, end plates, etc. Multiple soft-pack battery cells are stacked into groups, the plastic brackets are distributed on the front and back sides of the battery group, the busbars are fixed on the plastic brackets, the pole ears of the soft-pack battery cells pass through the plastic brackets and are welded and fixed to the busbars, and the end plates are distributed on the left and right sides of the battery group.

[0003] Conventional busbars are in sheet form. When welding the tabs, the tabs of the soft-pack battery cell need to be passed through the plastic bracket first, and then bend and flatten them and stick them to the end face of the busbar away from the soft-pack battery cell. Then, the tabs and the busbar are welded and fixed by laser. This processing technology involves multiple steps and has high requirements for the accuracy of bending and flattening, which makes the processing technology more complicated and not conducive to automatic processing. For this reason, the applicant has previously proposed a D-shaped busbar with application number CN2024213278565. Figure 1 As shown, it includes a front side plate, a rear side plate, a left side plate and a right side plate. The left side of the front side plate is fixedly connected to the left side of the rear side plate through the left side plate, and the right side of the front side plate is fixedly connected to the right side of the rear side plate through the right side plate. The left side surface of the left side plate and the right side surface of the right side plate are respectively flat and used to connect with the pole lugs. There is no need to bend and flatten the pole lugs during welding, which can simplify the processing technology and help reduce the complexity of processing. However, the improved busbar does not match the conventional plastic bracket, and there is a lack of a welding tool that is compatible with the D-shaped busbar. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a welding tool for a busbar, which can position a D-shaped busbar and a soft-pack battery cell to facilitate welding operations.

[0005] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a welding tool for a bus, comprising a mounting seat and a cover plate, the upper end of the mounting seat is provided with a mounting groove and positioning grooves located on the front and rear sides of the mounting groove, two soft-pack battery cells are stacked and placed in the mounting groove, the pole ears of the soft-pack battery cells extend into the positioning grooves located on the same side, a D-shaped bus is placed in the positioning groove, and the D-shaped bus is located between the two pole ears in the same positioning groove, the cover plate covers the notch of the mounting groove and the notch of the positioning groove, a first through hole connected to the positioning groove is provided on the cover plate, and a second through hole connected to the positioning groove is provided at the lower end of the mounting seat.

[0006] Preferably, a pressure plate and two pressure heads are fixedly provided at the lower end of the cover plate, the pressure plate extends into the installation groove and presses onto the surface of the soft-pack battery cell, the two pressure heads correspond one-to-one to the two positioning grooves, the pressure heads extend into the corresponding positioning grooves, and the D-shaped bus cooperates with the pressure head to clamp one of the pole ears in the same positioning groove.

[0007] Preferably, the pressure head includes two pressure strips distributed along the front-to-back direction, the pressure strips extend along the left-to-right direction, a channel is formed between the two pressure strips, and the channel is connected to the first through hole.

[0008] Preferably, grooves are respectively provided on the front and rear side surfaces of the mounting seat, and a plurality of third through holes communicating with the positioning grooves on the same side are formed at the bottom of the grooves.

[0009] Preferably, the side of the D-shaped bus away from the installation groove abuts against the side of the positioning groove and covers the third through hole, a vacuum generator is installed in the groove, and the suction end of the vacuum generator is connected to one or more of the third through holes.

[0010] Preferably, two connecting holes are provided on the left side or the right side of the mounting seat, and the two connecting holes correspond one-to-one to and are connected with the two positioning grooves. A push rod capable of sliding left and right is provided in the connecting hole, and one end of the push rod extends into the positioning groove and abuts against the D-shaped bus.

[0011] Preferably, the other end of the push rod extends out of the connecting hole and is fixedly provided with a connecting seat, and the connecting seat is connected to the side surface of the mounting seat through a tension spring.

[0012] Compared with the prior art, the advantages of the utility model are:

[0013] 1. When the cover plate is covered on the notch of the installation groove and the notch of the positioning groove, the cover plate cooperates with the groove bottom of the installation groove to clamp the two soft-pack batteries, and the cover plate cooperates with the groove bottom of the positioning groove to clamp the pole ear and the D-shaped busbar to position the D-shaped busbar and the soft-pack battery cell. The welding mechanism welds and fixes the pole ear on the corresponding side to the D-shaped busbar through the first through hole and the second through hole, and the welding operation is simple;

[0014] 2. After adopting this welding tool, there is no need to match the plastic bracket, which helps to reduce production costs. In addition, the elimination of the plastic bracket is conducive to the development of high energy density battery modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a D-shaped busbar;

[0016] Figure 2 It is a structural schematic diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the explosion structure of the utility model;

[0018] Figure 4 The local structure of the mounting seat in the utility model is shown in FIG. Figure 1 ;

[0019] Figure 5 This is a structural schematic diagram of the cover plate of the utility model;

[0020] Figure 6 The local structure of the mounting seat in the utility model is shown in FIG. Figure 2 ;

[0021] Figure 7 It is a schematic diagram of the partial explosion structure of the mounting seat in the utility model.

[0022] In the figure: 1. mounting seat; 11. mounting groove; 12. positioning groove; 13. second through hole; 14. groove; 15. third through hole; 16. connecting hole; 2. cover plate; 21. first through hole; 22. pressure plate; 23. pressure head; 231. pressure strip; 232. channel; 3. soft-pack battery cell; 31. pole ear; 4. D-shaped busbar; 41. front side plate; 42. rear side plate; 43. left side plate; 44. right side plate; 5. vacuum generator; 6. push rod; 61. connecting seat; 7. tension spring. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] The present patent application proposes a busbar welding tool, which is suitable for Figure 1 The bus shown includes a front side plate 41, a rear side plate 42, a left side plate 43 and a right side plate 44. The left side of the front side plate 41 is fixedly connected to the left side of the rear side plate 42 via the left side plate 43, and the right side of the front side plate 41 is fixedly connected to the right side of the rear side plate 42 via the right side plate 44. The left side surface of the left side plate 43 and the right side surface of the right side plate 44 are respectively planar.

[0026] Embodiment 1: Figures 1 to 4 As shown, a welding tool for a busbar comprises a mounting seat 1 and a cover plate 2, wherein a mounting groove 11 and positioning grooves 12 located at the front and rear sides of the mounting groove 11 are provided at the upper end of the mounting seat 1, two soft-pack battery cells 3 are stacked and placed in the mounting groove 11, and the pole ears 31 of the soft-pack battery cells 3 extend into the positioning groove 12 located on the same side, a D-shaped busbar 4 is placed in the positioning groove 12, and the D-shaped busbar 4 is located between the two pole ears 31 in the same positioning groove 12, the cover plate 2 covers the notch of the mounting groove 11 and the notch of the positioning groove 12, a first through hole 21 connected to the positioning groove 12 is provided on the cover plate 2, and a second through hole 13 connected to the positioning groove 12 is provided at the lower end of the mounting seat 1.

[0027] When the cover plate 2 covers the notch of the mounting groove 11 and the notch of the positioning groove 12, the cover plate 2 cooperates with the bottom of the mounting groove 11 to clamp the two soft-pack battery cells 3, and the cover plate 2 cooperates with the bottom of the positioning groove 12 to clamp the pole ear 31 and the D-shaped bus 4 to position the D-shaped bus 4 and the soft-pack battery cell 3, and the welding mechanism welds the pole ear 31 on the corresponding side to the D-shaped bus 4 through the first through hole 21 and the second through hole 13.

[0028] Embodiment 2: Figures 2 to 5 As shown, the rest of the parts are the same as those in the first embodiment, except that a pressing plate 22 and two pressing heads 23 are fixedly provided at the lower end of the cover plate 2, the pressing plate 22 extends into the mounting groove 11 and presses onto the surface of the soft-pack battery cell 3, the two pressing heads 23 correspond one to one with the two positioning grooves 12, the pressing heads 23 extend into the corresponding positioning grooves 12, and the D-shaped bus 4 cooperates with the pressing heads 23 to clamp a pole ear 31 in the same positioning groove 12.

[0029] In this embodiment, the pressure head 23 includes two pressure strips 231 distributed along the front-to-back direction, the pressure strips 231 extend along the left-to-right direction, and a channel 232 is formed between the two pressure strips 231. The channel 232 is connected to the first through hole 21. The two pressure strips 231 are pressed on the front and rear sides of the pole ear 31, which can ensure the flatness between the pole ear 31 and the D-shaped bus 4, thereby ensuring the welding quality.

[0030] In this embodiment, grooves 14 are respectively provided on the front and rear sides of the mounting seat 1. The bottom of the groove 14 is provided with a plurality of third through holes 15 connected to the positioning groove 12 on the same side. The heat generated during laser welding can be dissipated outwards through the third through holes.

[0031] Embodiment 3: Figures 2 to 5 As shown, the rest of the parts are the same as those of the second embodiment, except that the side of the D-shaped busbar 4 away from the installation groove 11 abuts against the side of the positioning groove 12 and covers the third through hole 15, and a vacuum generator 5 is installed in the groove 14, and the suction end of the vacuum generator 5 is connected to one or more third through holes 15. When the vacuum generator 5 is started, the D-shaped busbar 4 can be adsorbed and matched with the side of the positioning groove 12 to prevent the D-shaped busbar 4 from being displaced during the welding process, which helps to ensure the welding quality.

[0032] Embodiment 4: Figure 6 and Figure 7 As shown, the rest of the parts are the same as those of the first embodiment, except that two connecting holes 16 are provided on the left side or the right side of the mounting base 1, and the two connecting holes 16 correspond to and communicate with the two positioning grooves 12 one by one, and a push rod 6 capable of sliding left and right is provided in the connecting hole 16, and one end of the push rod 6 extends into the positioning groove 12 and is connected to the D-shaped bus 4 (see Figure 1 ) are abutted. Further, the other end of the push rod 6 extends out of the connection hole 16 and is fixedly provided with a connection seat 61, and the connection seat 61 is connected to the side of the mounting seat 1 through a tension spring 7, and the tension spring 7 is used to drive the push rod 6 to extend into the positioning groove 12. By providing the push rod 6, the D-shaped busbar 4 is prevented from being displaced left and right during the welding process, which helps to ensure the welding quality.

[0033] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A welding tool for busbars, characterized in that The invention comprises a mounting seat (1) and a cover plate (2); the upper end of the mounting seat (1) is provided with a mounting groove (11) and positioning grooves (12) located at the front and rear sides of the mounting groove (11); two soft-packed battery cells (3) are stacked and placed in the mounting groove (11); the pole ears (31) of the soft-packed battery cells (3) extend into the positioning groove (12) located on the same side; a D-shaped bus bar (4) is placed in the positioning groove (12); the D-shaped bus bar (4) is located between the two pole ears (31) in the same positioning groove (12); the cover plate (2) covers the notch of the mounting groove (11) and the notch of the positioning groove (12); the cover plate (2) is provided with a first through hole (21) connected to the positioning groove (12); and the lower end of the mounting seat (1) is provided with a second through hole (13) connected to the positioning groove (12).

2. A welding tool for busbar according to claim 1, characterized in that A pressing plate (22) and two pressing heads (23) are fixedly provided at the lower end of the cover plate (2); the pressing plate (22) extends into the installation groove (11) and presses onto the surface of the soft-pack battery cell (3); the two pressing heads (23) correspond to the two positioning grooves (12) one by one; the pressing heads (23) extend into the corresponding positioning grooves (12); the D-shaped busbar (4) cooperates with the pressing heads (23) to clamp one of the pole ears (31) in the same positioning groove (12).

3. A welding tool for busbar according to claim 2, characterized in that The pressure head (23) comprises two pressure strips (231) distributed along the front-to-back direction, the pressure strips (231) extending along the left-to-right direction, a channel (232) formed between the two pressure strips (231), and the channel (232) communicating with the first through hole (21).

4. A welding tool for busbar according to claim 1, characterized in that The front and rear sides of the mounting seat (1) are respectively provided with grooves (14), and the bottom of the groove (14) is provided with a plurality of third through holes (15) which are connected with the positioning groove (12) on the same side.

5. A welding tool for busbar according to claim 4, characterized in that The side of the D-shaped busbar (4) away from the installation groove (11) abuts against the side of the positioning groove (12) and covers the third through hole (15); a vacuum generator (5) is installed in the groove (14); and the suction end of the vacuum generator (5) is connected to one or more of the third through holes (15).

6. A welding tool for busbar according to claim 1, characterized in that Two connection holes (16) are arranged on the left side or the right side of the mounting seat (1), the two connection holes (16) correspond to and are connected to the two positioning grooves (12) one by one, a push rod (6) capable of sliding left and right is arranged in the connection hole (16), one end of the push rod (6) extends into the positioning groove (12) and abuts against the D-shaped bus bar (4).

7. A welding tool for busbar according to claim 6, characterized in that The other end of the push rod (6) extends out of the connection hole (16) and is fixedly provided with a connection seat (61); the connection seat (61) is connected to the side surface of the mounting seat (1) via a tension spring (7).

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