Large-current-carrying battery pack connecting piece easy to weld

Abstract

The utility model relates to the technical field of battery pack connecting pieces, in particular to a large-current-carrying battery pack connecting piece easy to weld. The nickel sheet comprises a nickel sheet layer and a copper sheet layer, wherein the copper sheet layer is arranged on the surface of the nickel sheet layer. And the nickel sheet layer is formed by bending a nickel sheet to respectively form a battery pack connecting surface and a welding surface. A plurality of H-shaped grooves are uniformly formed in the battery pack connecting surface, and a U-shaped groove is formed in the welding surface; a connecting part is arranged on the side end face, in the direction of the U-shaped groove, of the welding face. According to the utility model, the U-shaped groove is arranged on the welding surface of the nickel sheet layer, so that the contact area between the lead and the welding surface is increased, and the lead can be limited, so that the welding process is more convenient, the welding effect is better, and the structure is firmer; in addition, the copper sheet layer is added, so that the current-carrying capacity of the nickel sheet layer can be greatly improved, heat generation is reduced, and the heat dissipation performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack connector technology, specifically to a high-current battery pack connector that is easy to weld. Background Technology

[0002] Currently, power batteries are widely used in the market, such as electric vehicles, electric bicycles, and balance bikes. In order to meet the requirements of long-term range in actual use, the battery pack capacity and operating current are getting larger and larger. In the battery production process, multiple cells need to be connected in series and parallel through nickel sheets to meet the user's needs.

[0003] Currently, most nickel sheets on the market have a flat surface. To meet the requirements of high operating current, the wires are usually made relatively thick. During the soldering process, the wires tend to slide on the surface of the nickel sheet, making soldering difficult. In addition, due to the limited current carrying capacity of nickel sheets, high heat is generated after a long period of high current flow, resulting in poor heat dissipation and affecting battery performance. Utility Model Content

[0004] The purpose of this utility model is to provide a high-current-carrying battery pack connector that is easy to weld. By setting a U-shaped groove on the nickel sheet layer, it has a positioning function, which prevents the wires from sliding on the welding surface and facilitates the welding operation. At the same time, the copper sheet layer can increase the current-carrying capacity and heat dissipation capacity of the nickel sheet.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an easy-to-weld high-current battery pack connecting piece, comprising a nickel sheet layer and a copper sheet layer;

[0006] The nickel sheet layer is formed by bending nickel sheets to form the battery pack connection surface and the welding surface, respectively.

[0007] The battery pack connection surface is uniformly provided with multiple H-shaped grooves, and the welding surface is provided with U-shaped grooves; the side end face of the welding surface along the direction of the U-shaped groove is provided with a connecting part; the copper sheet layer is disposed on the surface of the nickel sheet layer.

[0008] Furthermore, the shape of the copper sheet layer is adapted to the shape of the nickel sheet layer, and the copper sheet layer completely covers the surface of the nickel sheet layer except for the connecting part.

[0009] Furthermore, the copper sheet layer has a first through hole uniformly provided on the surface inside the U-shaped groove and on the surface of the outer end of the U-shaped groove.

[0010] Furthermore, a second through hole adapted to the H-shaped groove is provided at the position on the surface of the copper sheet layer corresponding to the H-shaped groove.

[0011] Furthermore, a third through hole is provided on the surface of the copper sheet layer between two adjacent second through holes.

[0012] Furthermore, the surface of the connecting part is provided with a connecting hole.

[0013] Furthermore, the thickness of the nickel layer is greater than that of the copper layer.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. A U-shaped groove is set on the welding surface of the nickel sheet, which has a positioning function. During welding, the wire is placed directly inside the U-shaped groove, eliminating the need for additional wire fixing devices, making the welding process more convenient. In addition, the U-shaped groove increases the contact area between the wire and the welding surface, reducing the amount of solder used and the welding time, resulting in better welding effect and more reliable structure.

[0016] 2. A copper layer was added to the surface of the nickel layer; since copper has better conductivity than nickel, the current carrying capacity of the nickel layer can be increased. By increasing the current carrying capacity, heat generation is reduced, thereby improving heat dissipation.

[0017] 3. The H-shaped groove is a current-diverting groove. The function of the current-diverting groove is that when the battery cell is welded to the nickel sheet, the current of the spot welding machine passes through the nickel sheet on one side of the current-diverting groove and flows to the other side through the battery welding electrode, making the spot welding effect more firm. After the current of the spot welding machine is diverted through the current-diverting groove, the current at the welding position between the spot welding needle and the surface of the nickel sheet is reduced, thereby reducing the occurrence of blackening of the weld, pin pulling, cold welding, and poor nickel sheet wrinkling. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the nickel sheet layer of this utility model.

[0020] Figure 3 This is a schematic diagram of the copper sheet layer of this utility model.

[0021] Figure 4 This is a schematic diagram of the connection structure when the present invention is welded to a wire.

[0022] Label Explanation:

[0023] 1. Nickel sheet layer; 11. Battery pack connection surface; 111. H-groove; 12. Welding surface;

[0024] 121. U-shaped groove; 13. Connecting part; 131. Connecting hole; 2. Copper sheet layer; 21. First through hole; 22. Second through hole; 23. Third through hole; 3. Wire. Detailed Implementation

[0025] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0026] Please refer to Figures 1-4 As shown, the technical solution adopted by this utility model is: an easy-to-weld high-current battery pack connecting piece, comprising a nickel sheet layer 1 and a copper sheet layer 2;

[0027] The nickel sheet layer 1 is formed by bending nickel sheets to form the battery pack connection surface 11 and the welding surface 12, respectively.

[0028] The battery pack connection surface 11 is uniformly provided with a plurality of H-shaped grooves 111, and the welding surface 12 is provided with a U-shaped groove 121; the welding surface 12 is provided with a connecting part 13 on the side end face along the direction of the U-shaped groove 121; the copper sheet layer 2 is disposed on the surface of the nickel sheet layer 1.

[0029] As can be seen from the above description, when the operator needs to weld the wire 3 to the battery pack connecting piece, the wire 3 can be directly placed in the U-shaped groove 121. The U-shaped groove 121 effectively restricts the displacement of the wire 3 on the welding surface and increases the contact area with the wire 3, reducing the amount of solder used and making the welding process faster and more convenient. The H-shaped groove 111 is a current distribution groove, which reduces the current at the welding position between the welding needle of the spot welding machine and the surface of the nickel sheet, thereby reducing the blackening of the solder joint, pin pulling, cold solder joint, and poor nickel sheet wrinkling. In addition, adding a copper sheet layer 2 to the outer surface of the nickel sheet layer 1 can improve the current carrying capacity of the nickel sheet layer 1, thereby reducing heat generation and improving heat dissipation performance.

[0030] Preferably, the shape of the copper sheet layer 2 is adapted to the shape of the nickel sheet layer 1, and the copper sheet layer 2 completely covers the surface of the nickel sheet layer 1 except for the connecting portion 13.

[0031] As can be seen from the above description, by covering the outer surface of the nickel layer 1 with a large area of ​​copper layer 2, the current carrying capacity of the nickel layer 1 can be greatly improved. By improving the current carrying capacity, the heat generation is reduced, thereby improving the heat dissipation capacity.

[0032] Preferably, the copper sheet layer 2 has a first through hole 21 uniformly provided on the surface inside the U-shaped groove 121 and on the surface of the outer end of the U-shaped groove 121.

[0033] As can be seen from the above description, by setting the first through hole 21, the surface area of ​​the copper sheet layer 2 can be increased, thereby enhancing the heat dissipation and conduction effect of the wire 3 and the U-shaped groove 121, and improving the heat dissipation performance.

[0034] Preferably, a second through hole 22 adapted to the H-shaped groove 111 is provided at the position on the surface of the copper sheet layer 2 corresponding to the position of the H-shaped groove 111.

[0035] As can be seen from the above description, by setting the second through hole 22, the positioning of the battery cell is facilitated, making the connection between the battery cell and the nickel sheet layer 1 more stable; at the same time, the surface area of ​​the copper sheet layer 2 is increased, thereby improving the heat dissipation and conduction effect at the corresponding position of the H-shaped groove 111 and improving the heat dissipation performance.

[0036] Preferably, a third through hole 23 is provided on the surface of the copper sheet layer 2 between two adjacent second through holes 22.

[0037] As can be seen from the above description, by setting the third through hole 23, the surface area of ​​the copper sheet layer 2 is increased, thereby increasing its heat dissipation and conduction effect and improving its heat dissipation performance.

[0038] Preferably, the surface of the connecting part 13 is provided with a connecting hole 131.

[0039] As can be seen from the above description, the above settings facilitate welding of the connecting part 13 to another wire. During welding, the operator can insert the wire into the connecting hole 131 for spot welding.

[0040] Preferably, the thickness of the nickel layer 1 is greater than the thickness of the copper layer 2.

[0041] As can be seen from the above description, the thicker nickel layer 1 can improve the load-bearing capacity and thermal stability of the solder joint, prevent the solder joint from melting and opening, and especially in high-temperature environments, it can better ensure the connection and smooth operation of the circuit.

[0042] The working principle of this utility model is as follows: When the battery pack connecting piece is welded to the wire 3, the operator places the welding end of the wire 3 in the U-shaped groove 121 on the nickel sheet layer 1. The U-shaped groove 121 is adapted to the size of the wire 3, and the wire 3 will not shift in the radial direction of the welding surface 12. The position of the wire 3 on the axis can be controlled by the operator. In addition, the contact area between the wire 3 and the U-shaped groove 121 is increased, so the welding process is faster and more convenient. The operator welds the wire 3 into the U-shaped groove 121 by spot welding. The front end of another wire to be welded is passed through the connecting hole 131, and after the wire is bent appropriately, spot welding can be performed to connect the other wire to the connecting part 13. When welding the battery cell, the battery cell is passed through the second through hole 22 and attached to the nickel sheet layer 1 before spot welding. This battery pack connecting piece needs to be used in conjunction with another type of battery pack connecting piece to realize the series connection of multiple battery packs.

[0043] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A readily solderable, high current battery pack tab, characterized by, It includes nickel and copper layers; The nickel sheet layer is formed by bending nickel sheets to form the battery pack connection surface and the welding surface, respectively. The battery pack connection surface is uniformly provided with multiple H-shaped grooves, and the welding surface is provided with U-shaped grooves; the side end face of the welding surface along the direction of the U-shaped grooves is provided with a connecting part; the copper sheet layer is disposed on the surface of the nickel sheet layer; The shape of the copper sheet layer is adapted to the shape of the nickel sheet layer, and the copper sheet layer completely covers the surface of the nickel sheet layer except for the connecting part; The copper sheet layer has a first through hole uniformly provided on the surface inside the U-shaped groove and on the surface at the outer end of the U-shaped groove; The surface of the copper sheet is provided with a second through hole that is adapted to the H-shaped groove at the position corresponding to the H-shaped groove. A third through hole is provided on the surface of the copper sheet layer between two adjacent second through holes; The surface of the connecting part is provided with connecting holes; the thickness of the nickel sheet layer is greater than the thickness of the copper sheet layer.

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