Auxiliary device for tab welding

Abstract

The utility model discloses an auxiliary device for pole lug welding, which comprises a workbench, the workbench is provided with a lower mounting seat and an upper mounting seat located right above the lower mounting seat, the lower end face of the upper mounting seat is provided with a plurality of square supporting rods, the upper end face of the lower mounting seat is provided with a plurality of inserting holes, and the inserting holes are communicated with the lower mounting seat. A plurality of inserting holes are formed in the upper mounting seat and the lower mounting seat, the plurality of inserting holes correspond to the plurality of supporting rods in a one-to-one manner, the lower ends of the supporting rods are inserted into the corresponding inserting holes, strip-shaped avoiding holes are formed in the side surfaces of the supporting rods, and the avoiding holes are located in the area between the lower mounting seat and the upper mounting seat; the method has the advantages that the production cost is reduced, and the development of a high-energy-density battery module is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery modules, and in particular relates to an auxiliary device for tab welding. 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 laser welded to the busbars after being bent and flattened, and the end plates are distributed on the left and right sides of the battery group.

[0003] In the definition of the product itself, the plastic bracket and the busbar are redundant. Their original intention is to allow the tabs between the cells to be supported during the welding process, so as to realize the series and parallel connection between the tabs, but the plastic bracket and the busbar increase the module cost, module volume and module weight. For this reason, as disclosed in the application number CN2017105455990, a battery module tab welding auxiliary device and a battery module tab welding method are provided. When assembling, the device body of the battery module tab welding auxiliary device is first inserted into the tab from the side position of the tab of the battery module, and each slit on the device body is inserted into a tab. Then, the current collector is set onto the tab from the position above the tab of the battery module, and each notch of the current collector is set on a tab. After each tab is installed in the corresponding notch, each tab is welded to the current collector. After welding is completed, the device body is pulled out from the side position of the tab of the battery module to complete the welding of the battery module tab. In this technical solution, the current collector is a bus. Although the plastic bracket is eliminated and a welding auxiliary device is used to support the bus, the bus is not eliminated and the production cost is still very high, which is not conducive to the development of high energy density battery modules. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an auxiliary device for pole ear welding, which helps to reduce production costs and contributes to the development of high energy density battery modules.

[0005] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: an auxiliary device for pole ear welding, including a workbench, a lower mounting seat and an upper mounting seat located directly above the lower mounting seat are arranged on the workbench, a plurality of square support rods are arranged on the lower end surface of the upper mounting seat, a plurality of insertion holes are arranged on the upper end surface of the lower mounting seat, the plurality of insertion holes correspond one-to-one to the plurality of support rods, the lower ends of the support rods are inserted into the corresponding insertion holes, and strip-shaped avoidance holes are arranged on the side surfaces of the support rods, and the avoidance holes are located in the area between the lower mounting seat and the upper mounting seat.

[0006] Preferably, the plurality of support rods are distributed at equal intervals in the left-right direction, and the avoidance holes penetrate the front and rear sides of the support rods.

[0007] Preferably, a first positioning groove is provided on the left side of the support rod, and the first positioning groove passes through the front and rear side surfaces of the support rod; a second positioning groove is provided on the right side of the support rod, and the second positioning groove passes through the front and rear side surfaces of the support rod; the first positioning groove, the avoidance hole and the second positioning groove are distributed in the left and right directions.

[0008] Preferably, the lower end surface of the upper mounting seat is provided with a plurality of mounting holes distributed at equal intervals in the left-right direction, the plurality of mounting holes correspond one-to-one to the plurality of support rods, and the upper ends of the support rods are inserted into the corresponding mounting holes.

[0009] Preferably, a through hole connected to the front side or rear side of the upper mounting seat is provided on the side of the mounting hole, and a screw hole connected to the through hole is provided on the side of the support rod, and a bolt is threadedly connected to the screw hole after passing through the through hole.

[0010] Preferably, an upper positioning block is fixedly provided on the side surface of the support rod, the upper positioning block is located above the avoidance hole, and the upper end surface of the upper positioning block abuts against the lower end surface of the upper mounting seat.

[0011] Preferably, a protrusion is fixedly provided on the upper end surface of the upper positioning block, and a plurality of grooves are provided on the lower end surface of the upper mounting seat. The plurality of grooves correspond to the plurality of protrusions one by one, and the protrusions extend into the grooves.

[0012] Preferably, a through hole connected to the front side or rear side of the lower mounting seat is provided on the side surface of the socket, and a slider and an elastic member are provided in the through hole. The slider is slidably matched with the through hole, one end of the slider extends into the socket, and one end of the slider is provided with an inclined guide surface. The elastic member is used to drive the slider to slide in the direction of the socket. When the support rod is inserted into the socket, the support rod pushes the slider to slide outward through the guide surface, so that the other end of the slider extends out of the through hole.

[0013] Preferably, the lower end surface of the support rod is provided with an inclined guide surface which is inclined from inside to outside and upward.

[0014] Preferably, a driving motor is provided on the workbench, and the driving motor is used to drive the upper mounting seat to move up and down, so that the supporting rod is inserted into the socket or separated from the socket.

[0015] Compared with the prior art, the advantages of the utility model are: when performing welding operations, the support rod is first inserted between adjacent pole ears, and the two pole ears are bent and flattened to cover the avoidance holes and are stacked front to back, and then the parts of the two pole ears covering the avoidance holes are welded by welding tools. The setting of the avoidance holes can avoid adhesion between the pole ears and the support rods. After welding is completed, the support rod is pulled out upward. It can be seen that when using this auxiliary device to weld the pole ears, there is no need to match plastic brackets and bus bars, which helps to reduce production costs. In addition, the elimination of plastic brackets and bus bars contributes to the development of high energy density battery modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the partial structure of the utility model when it is equipped with a soft-pack battery module;

[0017] Figure 2 It is a schematic diagram of the local structure of the utility model Figure 1 ;

[0018] Figure 3 It is a schematic diagram of the partial explosion structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the support rod in the utility model;

[0020] Figure 5 It is a structural schematic diagram of the upper mounting seat in the utility model;

[0021] Figure 6 It is a schematic diagram of the local structure of the utility model Figure 2 ;

[0022] Figure 7 It is a schematic diagram of the cross-sectional structure of the lower mounting seat in the utility model.

[0023] In the figure: 1. workbench; 2. lower mounting seat; 21. socket; 22. through hole; 23. slider; 231. guide surface; 24. elastic member; 3. upper mounting seat; 31. mounting hole; 32. through hole; 33. groove; 4. support rod; 41. avoidance hole; 42. first positioning groove; 43. second positioning groove; 44. screw hole; 45. upper positioning block; 46. protrusion; 47. inclined guide surface; 5. drive motor. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] 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.

[0026] Embodiment 1: Figures 1 to 3 As shown, an auxiliary device for electrode tab welding includes a workbench 1, on which a lower mounting seat 2 and an upper mounting seat 3 located directly above the lower mounting seat 2 are arranged, a plurality of square support rods 4 are arranged on the lower end surface of the upper mounting seat 3, a plurality of insertion holes 21 are arranged on the upper end surface of the lower mounting seat 2, the plurality of insertion holes 21 correspond one to one with the plurality of support rods 4, the lower ends of the support rods 4 are inserted into the corresponding insertion holes 21, and strip-shaped avoidance holes 41 are arranged on the side surfaces of the support rods 4, the avoidance holes 41 are located in the area between the lower mounting seat 2 and the upper mounting seat 3, and the electrode tabs of the soft-pack battery core pass through between two adjacent support rods 4, and are covered on the avoidance holes 41 after being bent and flattened.

[0027] In this embodiment, the plurality of support rods 4 are distributed at equal intervals along the left-right direction, and the avoidance holes 41 penetrate the front and rear side surfaces of the support rods 4 .

[0028] In this embodiment, a driving motor 5 is provided on the workbench 1, and the driving motor 5 is used to drive the upper mounting seat 3 to move up and down, so that the support rod 4 is inserted into the socket 21 or separated from the socket 21, wherein the driving motor 5 generally adopts a cylinder or an oil cylinder.

[0029] When performing welding operations, first insert the support rod 4 between adjacent pole ears. After the two pole ears are bent and flattened, they cover the avoidance holes 41 and are stacked front to back. Then, the parts of the two pole ears covering the avoidance holes 41 are welded by welding tools. The setting of the avoidance holes 41 can avoid welding between the pole ears and the support rod 4. After welding is completed, the support rod 4 is pulled out upward.

[0030] In this embodiment, the support rod 4 is made of high-strength metal, not limited to copper, aluminum, steel and other alloys. The support strength is much greater than that of a conventional plastic bracket, which can effectively avoid the fitting gap between the pole ears and ensure the welding quality.

[0031] Embodiment 2: Figure 4 and Figure 5As shown, the rest of the parts are the same as those in Example 1, with the difference being that a first positioning groove 42 is provided on the left side of the support rod 4, and the first positioning groove 42 passes through the front and rear side surfaces of the support rod 4, and a second positioning groove 43 is provided on the right side of the support rod 4, and the second positioning groove 43 passes through the front and rear side surfaces of the support rod 4. The first positioning groove 42, the avoidance hole 41 and the second positioning groove 43 are distributed along the left and right directions. When the support rod 4 is inserted between adjacent pole ears, the pole ear on the left side of the support rod 4 is located in the first positioning groove 42, and the pole ear on the right side of the support rod 4 is located in the second positioning groove 43. The two correspond one to one, which is convenient for the staff to confirm whether the pole ear and the support rod 4 are accurately aligned.

[0032] In this embodiment, the lower end surface of the upper mounting seat 3 is provided with a plurality of mounting holes 31 distributed at equal intervals along the left-right direction, and the plurality of mounting holes 31 correspond one-to-one to the plurality of support rods 4 , and the upper ends of the support rods 4 are inserted into the corresponding mounting holes 31 .

[0033] In this embodiment, a through hole 32 communicating with the front side or rear side of the upper mounting seat 3 is provided on the side of the mounting hole 31, a screw hole 44 communicating with the through hole 32 is provided on the side of the support rod 4, and a bolt passes through the through hole 32 and is threadedly connected with the screw hole 44. Preferably, two through holes 32 are provided on the side of each mounting hole 31, and two screw holes 44 are provided on the side of the support rod 4 to improve the stability of the connection between the two.

[0034] Embodiment 3: Figure 4 and Figure 5 As shown, the rest of the parts are the same as those in the second embodiment, except that an upper positioning block 45 is fixedly provided on the side of the support rod 4, and the upper positioning block 45 is located above the avoidance hole 41. The upper end surface of the upper positioning block 45 abuts against the lower end surface of the upper mounting seat 3. The upper positioning block 45 plays a positioning role, which facilitates the rapid assembly of the support rod 4 and the upper mounting seat 3.

[0035] In this embodiment, a protrusion 46 is fixedly provided on the upper end surface of the upper positioning block 45, and a plurality of grooves 33 are provided on the lower end surface of the upper mounting seat 3. The plurality of grooves 33 correspond one to one with the plurality of protrusions 46. The protrusions 46 extend into the grooves 33, and the protrusions 46 cooperate with the grooves 33 so that the support rod 4 can only be inserted into the mounting hole 31 at a specified angle to connect and cooperate with the upper mounting seat 3, which has an anti-foolproof function.

[0036] Embodiment 4: Figure 4 , Figure 6 and Figure 7As shown, the rest of the parts are the same as those in the first embodiment, except that a through hole 22 connected to the front side or rear side of the lower mounting seat 2 is provided on the side of the insertion hole 21, a slider 23 and an elastic member 24 are provided in the through hole 22, the slider 23 is slidably matched with the through hole 22, one end of the slider 23 extends into the insertion hole 21, one end of the slider 23 is provided with an inclined guide surface 231, and the elastic member 24 is used to drive the slider 23 to slide in the direction of the insertion hole 21. When the support rod 4 is inserted into the insertion hole 21, the support rod 4 pushes the slider 23 to slide outward through the guide surface 231, so that the other end of the slider 23 extends out of the through hole 22, which is convenient for the staff to confirm whether the support rod 4 has been moved to the specified position.

[0037] In this embodiment, the through hole 22 is in a step shape, and the elastic member 24 is a compression spring, which is arranged on the step surface of the through hole 22. When the slider 23 slides outward, the compression spring stretches and generates a rebound force. When the support rod 4 is separated from the socket 21, the compression spring drives the slider 23 to slide inward and return to its initial state.

[0038] In this embodiment, the lower end surface of the support rod 4 is provided with an inclined guide surface 47 which is inclined from the inside to the outside and upward.

[0039] 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. An auxiliary device for tab welding, comprising a workbench (1), characterized in that The workbench (1) is provided with a lower mounting seat (2) and an upper mounting seat (3) located directly above the lower mounting seat (2); the lower end surface of the upper mounting seat (3) is provided with a plurality of square support rods (4); the upper end surface of the lower mounting seat (2) is provided with a plurality of insertion holes (21); the plurality of insertion holes (21) correspond to the plurality of support rods (4) one by one; the lower ends of the support rods (4) are inserted into the corresponding insertion holes (21); the side surfaces of the support rods (4) are provided with strip-shaped avoidance holes (41); the avoidance holes (41) are located in the area between the lower mounting seat (2) and the upper mounting seat (3).

2. The auxiliary device for tab welding according to claim 1, characterized in that The plurality of support rods (4) are distributed at equal intervals in the left-right direction, and the avoidance holes (41) penetrate the front and rear side surfaces of the support rods (4).

3. The auxiliary device for tab welding according to claim 2, characterized in that The left side of the support rod (4) is provided with a first positioning groove (42), the first positioning groove (42) runs through the front and rear sides of the support rod (4), the right side of the support rod (4) is provided with a second positioning groove (43), the second positioning groove (43) runs through the front and rear sides of the support rod (4), and the first positioning groove (42), the avoidance hole (41) and the second positioning groove (43) are distributed in the left and right directions.

4. The auxiliary device for tab welding according to claim 2, characterized in that The lower end surface of the upper mounting seat (3) is provided with a plurality of mounting holes (31) distributed at equal intervals in the left-right direction, the plurality of mounting holes (31) correspond one-to-one to the plurality of support rods (4), and the upper ends of the support rods (4) are inserted into the corresponding mounting holes (31).

5. The auxiliary device for tab welding according to claim 4, characterized in that The side of the mounting hole (31) is provided with a through hole (32) connected to the front side or the rear side of the upper mounting seat (3), and the side of the support rod (4) is provided with a screw hole (44) connected to the through hole (32), and a bolt passes through the through hole (32) and is threadedly connected to the screw hole (44).

6. The auxiliary device for tab welding according to claim 4, characterized in that An upper positioning block (45) is fixedly provided on the side of the support rod (4), the upper positioning block (45) is located above the avoidance hole (41), and the upper end surface of the upper positioning block (45) abuts against the lower end surface of the upper mounting seat (3).

7. The auxiliary device for tab welding according to claim 6, characterized in that A protrusion (46) is fixedly provided on the upper end surface of the upper positioning block (45), and a plurality of grooves (33) are provided on the lower end surface of the upper mounting seat (3). The plurality of grooves (33) correspond to the plurality of protrusions (46) one by one, and the protrusions (46) extend into the grooves (33).

8. The auxiliary device for tab welding according to claim 4, characterized in that A through hole (22) is provided on the side of the insertion hole (21) and is connected to the front side or the rear side of the lower mounting seat (2). A slider (23) and an elastic member (24) are provided in the through hole (22). The slider (23) is slidably matched with the through hole (22). One end of the slider (23) extends into the insertion hole (21). An inclined guide surface (231) is provided at one end of the slider (23). The elastic member (24) is used to drive the slider (23) to slide in the direction of the insertion hole (21). When the support rod (4) is inserted into the insertion hole (21), the support rod (4) pushes the slider (23) to slide outward through the guide surface (231), so that the other end of the slider (23) extends out of the through hole (22).

9. The auxiliary device for tab welding according to claim 1, characterized in that The lower end surface of the support rod (4) is provided with an inclined guide surface (47) which is inclined from inside to outside and upward.

10. The auxiliary device for tab welding according to claim 1, characterized in that The workbench (1) is provided with a driving motor (5), and the driving motor (5) is used to drive the upper mounting seat (3) to move up and down, so that the supporting rod (4) is inserted into the insertion hole (21) or separated from the insertion hole (21).

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