Auxiliary die device for connecting battery piece and welding strip

Abstract

An auxiliary mold device for connection of a battery piece and a welding strip comprises a base plate. The base plate is of a rectangular plate surface structure, two sets of welding wire clamping groove plates are horizontally laid on the plane of the top of the base plate, bus bar clamping grooves are horizontally formed in the base plate along the inner sides of the welding wire clamping groove plates, the bus bar clamping grooves are filled with bus bars, right-angle clamping grooves are fixedly formed in the inner sides of the bus bars, and to-be-machined battery pieces are placed on the right-angle clamping grooves. The utility model relates to a die device for assisting in connection of a battery piece and a welding strip. The die device mainly comprises a base and a movable clamping groove, battery piece positioning clamping grooves are formed in the base, located in the four corners of a battery piece, designed according to the sizes of different battery pieces and used for fixing the battery piece so that the battery piece can not deviate. The structure is simple and operation is convenient; for different grid lines of the battery with the same size, the use requirement can be met only by replacing the grid line clamping groove; manual errors are eliminated, the welding consistency of the battery piece and the welding strip is improved, and data fluctuation is reduced; and the manufacturing and maintenance cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field, and in particular relates to an auxiliary mold device for connecting a battery sheet with a welding strip. Background Art

[0002] In recent years, with the rapid development of battery technology, there are more and more types of battery technology development, including battery type, battery structure, battery size, battery appearance, etc., among which the changes in battery main grid lines are particularly prominent.

[0003] The surface of photovoltaic cells is covered with fine grids and main grids in the horizontal direction. The fine grids are used to efficiently collect electrons and merge them into the main grid and welding strips. The main grids are mainly used to weld welding strips and string single cells into battery strings. As we all know, the more sunlight a photovoltaic cell absorbs, the greater its power generation. In order to increase the light-receiving area of ​​the cell, the appropriate aspect ratio of the main grid line of the cell has been explored in the industry. The main direction is to reduce the width of the main grid and increase the light-receiving area of ​​the cell. Its development process has gone through a wider two-grid, gradually narrowing three-grid, four-grid, five-grid, and now multiple-grid, or even no grid. The size of the welding strip has also changed as the width of the main grid of the cell narrows, from the original flat welding strip with a width of 1.2mm to the current round wire welding strip with a minimum diameter of about 0.25mm. Changes in the main grid lines of the battery cells, the shape and size of the welding strips increase the difficulty of welding the battery cells and the welding strips. The main manifestation is that the welding strips and the main grid lines cannot be perfectly fitted manually, which easily leads to welding strip bending, welding strip cold welding, welding strip desoldering, or the gap between the main grid-free battery and the welding strip is too large, and the welding strip is loose and bent, resulting in large fluctuations in the power generation detected by the battery. In this way, the experimental results will be affected during the experiment.

[0004] In order to overcome the welding problems caused by thinning of the main grid line and welding strip of the battery cell and effectively improve the welding effect, the utility model provides an auxiliary device for connecting the battery cell with the welding strip, which assists the positioning of the welding strip and the battery cell during welding and meets all welding requirements. Summary of the invention

[0005] In order to achieve the above object, the technical solution of the utility model is as follows:

[0006] An auxiliary mold device for connecting a battery cell to a welding strip comprises a substrate; the substrate is a rectangular plate structure, two sets of welding wire slot plates are horizontally laid on the top plane of the substrate, bus bar slots are horizontally opened along the inner side of the welding wire slot plates, the bus bar slots are filled with bus bars, right-angle slots are fixedly installed on the inner side of the bus bars, and battery cells to be processed are placed on the right-angle slots.

[0007] Furthermore, the base plate is provided with an insertion hole along the position of the welding wire slot plate, the insertion hole is a transverse through structure, and a cylindrical insertion handle at the root of the welding wire slot plate is inserted into the insertion hole.

[0008] Furthermore, the spacing between the welding wire slot plate and the right-angle slot is 6.5 mm.

[0009] Furthermore, a plurality of groups of welding wire slots are evenly arranged on the welding wire slot plate, and the lowest points of the slot bottoms of the welding wire slots are flush with the upper plane of the base plate.

[0010] Furthermore, the length of the outer side of the right-angle slot ranges from 10 mm to 14 mm.

[0011] Furthermore, the depth interval between the lowest plane of the right-angle groove at the center of the substrate and the upper plane of the substrate is 150 μm to 160 μm.

[0012] The beneficial effects of the utility model are:

[0013] Compared with the prior art, the utility model adopts a mold device that plays an auxiliary role in connecting the battery cell and the welding strip, which is mainly composed of a base and an active slot. There are battery cell positioning slots on the base, located at the four corners of the battery cell, designed according to different battery cell sizes, and used to fix the battery cell without offset. The active slot is slotted according to the required number of welding strips, and is used to fix the welding strip to the position where the battery cell needs to be connected without offset. It can be used for welding batteries with main grids or dispensing welding strips on batteries without main grids, ensuring that the welding strip fits tightly with the battery after completion and is bent and offset.

[0014] Technical effects and advantages of the utility model:

[0015] (1) Simple structure and easy operation;

[0016] (2) For different grid lines of the same size battery, you only need to replace the grid line slot to meet the usage requirements;

[0017] (3) Eliminate human errors, improve the consistency of battery cell and ribbon welding, and reduce data fluctuations;

[0018] (4) Low production and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a top view of an auxiliary mold device for connecting a battery cell and a welding ribbon according to the utility model.

[0020] Figure 2 This is a front view of an auxiliary mold device for connecting a battery cell and a welding ribbon according to the utility model.

[0021] List of Figure Symbols:

[0022] 1 is a base plate, 2 is a welding wire slot plate, 3 is a welding wire slot, 4 is a right-angle slot, 5 is a busbar slot, and 6 is a battery storage slot. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. It should be understood that the following specific implementations are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0024] like Figure 1 and Figure 2 As shown, an auxiliary mold device for connecting a battery cell with a welding strip includes a substrate; the substrate 1 is a rectangular plate structure, and two groups of welding wire slot plates 2 are horizontally laid on the top plane of the substrate 1. The substrate 1 is provided with a bus bar slot 5 horizontally along the inner side of the welding wire slot plate 2, and the bus bar slot 5 is filled with a bus bar, and a right-angle slot 4 is fixedly installed inside the bus bar, and the battery cell to be processed is placed on the right-angle slot 4. The device has a substrate for fixing the battery in the middle position, and the slots for fixing the welding strips on both sides, and a platform for placing the bus bar inside the welding strip slot.

[0025] like Figure 1 and Figure 2 As shown, the substrate 1 is provided with a socket along the position of the welding wire slot plate 2, and the socket is a horizontal through structure, and a cylindrical handle at the root of the welding wire slot plate 2 is inserted into the socket. Among them, circular sockets are opened at both ends of the fixed battery cell substrate for placing the welding ribbon slots at both ends. The circular design is mainly for the convenience of inserting the slots, and other shapes can be designed. The appearance shape of the welding ribbon slot is a rectangular structure on the top and a cylindrical structure on the bottom. The shape of the bottom is not limited to a cylindrical structure, and can be other structures, such as a rectangular parallelepiped or a polygonal cylinder, but the cylinder is the most convenient for insertion. The number and spacing of the welding ribbon grooves on the slot are determined by the main grid and spacing of the battery cell. For batteries without main grids, it is determined according to actual needs.

[0026] like Figure 1 and Figure 2 As shown, the spacing between the welding wire slot plate 2 and the right-angle slot 4 is 6.5mm. The busbar placement platform is located between the welding strip slot and the four corners of the battery cell. The width is 6.5mm. The conventional busbar is generally 6mm, and the narrow busbar is 3mm, ensuring that the busbar can be easily put in and taken out.

[0027] like Figure 1 and Figure 2 As shown, the welding wire slot plate 2 is evenly provided with a plurality of welding wire slots 3, and the lowest point of the slot bottom of the welding wire slot 3 is flush with the upper plane of the substrate 1. The bottom of the welding ribbon slot welding ribbon hole is in the same plane with the substrate after being inserted into the substrate.

[0028] like Figure 1 and Figure 2 As shown, the length of the outer side of the right-angle slot 4 ranges from 10 mm to 14 mm.

[0029] like Figure 1 and Figure 2 As shown, the depth interval between the lowest plane of the right-angle slot 4 in the center of the substrate 1 and the upper plane of the substrate 1 is 150μm to 160μm. Among them, the substrate for fixing the battery cell is made of an aluminum plate with a thickness of ≥24mm and a pit of the size of the battery cell is milled at the center by a lathe. The length and width dimensions are increased by 0.5mm according to the size of 166, 182, 183, and 210 batteries, and the depth is 150~160μm, in order to facilitate the placement of batteries to be operated and the removal of batteries that have been operated, without causing fragmentation and hidden cracks of the battery cell, resulting in waste.

[0030] It should be noted that the above content only illustrates the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model. These improvements and modifications all fall within the protection scope of the claims of the utility model.

Claims

1. An auxiliary mold device for connecting a battery cell to a welding ribbon, comprising a substrate; wherein: The substrate (1) is in a rectangular plate structure, two groups of welding wire slot plates (2) are horizontally laid on the top plane of the substrate (1), bus bar slots (5) are horizontally opened along the inner sides of the welding wire slot plates (2) on the substrate (1), bus bars are filled in the bus bar slots (5), right angle slots (4) are fixedly installed on the inner sides of the bus bars, and battery cells to be processed are placed on the right angle slots (4).

2. The auxiliary mold device for connecting a battery cell to a welding ribbon according to claim 1, characterized in that: The base plate (1) is provided with an insertion hole along the position of the welding wire slot plate (2), the insertion hole being a transverse through structure, and a cylindrical insertion handle at the root of the welding wire slot plate (2) is inserted into the insertion hole.

3. The auxiliary mold device for connecting a battery cell to a welding ribbon according to claim 1, characterized in that: The distance between the welding wire slot plate (2) and the right-angle slot (4) is 6.5 mm.

4. The auxiliary mold device for connecting a battery cell to a welding ribbon according to claim 1, characterized in that: A plurality of groups of welding wire slots (3) are evenly arranged on the welding wire slot plate (2), and the lowest points of the slot bottoms of the welding wire slots (3) are flush with the upper plane of the base plate (1).

5. The auxiliary mold device for connecting a battery cell to a welding ribbon according to claim 1, characterized in that: The length of the outer side of the right-angle slot (4) ranges from 10 mm to 14 mm.

6. The auxiliary mold device for connecting a battery cell to a welding ribbon according to claim 1, characterized in that: The depth interval between the lowest plane of the right-angle slot (4) at the center of the substrate (1) and the upper plane of the substrate (1) is 150 μm to 160 μm.

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