Direct acquisition type integrated busbar convenient to repair

Abstract

The utility model relates to a direct-sampling type integrated busbar convenient to repair. The direct-sampling type integrated busbar comprises a bracket, a flexible printed circuit board arranged on the bracket, a plurality of confluence pieces and a plurality of screws, the flexible printed circuit board comprises a base material, a positive insulation protective film and a back insulation protective film, the base material comprises a base material main body and a plurality of acquisition branches which are integrally formed, the free end of each acquisition branch is an acquisition end, a first through hole is formed in each acquisition end, a threaded hole is formed in each confluence piece, and a second through hole is formed in each confluence piece. One screw penetrates through one first through hole until the screw is in threaded connection with one corresponding threaded hole, the screw head of the screw abuts against the collection end, and the base material is coated with the positive insulation protection film and the back insulation protection film. Compared with the prior art, the integrated busbar provided by the utility model locks and fixes the acquisition end and the confluence piece through the screws, can ensure the electric connection effect of the acquisition end and the confluence piece, and can improve the product yield. Meanwhile, the connecting structure is simple, the process difficulty is low, assembling is convenient, when maintenance is needed, only the screws need to be unscrewed, and repairing is convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to integrated busbar technology, concretely relates to a direct sampling type integrated busbar convenient for repair. BACKGROUND

[0002] In the field of new energy power and energy storage battery technology, voltage and temperature collection of battery module is a key link to ensure battery safety and performance, so an integrated busbar is arranged on the battery module to detect data and ensure safe use.

[0003] The integrated busbar mainly comprises a support, an FPC arranged on the support and a current collecting piece, a nickel sheet is arranged on the collection branch of the FPC, the nickel sheet is connected with the current collecting piece, the current collecting piece is connected with the battery cell, and thus the collection function of the integrated busbar is realized. However, since the existing FPC needs to be provided with a nickel sheet on the collection branch, the nickel sheet needs to be welded and fixed to the collection branch of the FPC, which increases the complexity of the production process, and in the welding process, the problem of poor welding may occur, which directly affects the reliability and production efficiency of the battery module.

[0004] Therefore, in the existing integrated busbar, the main structure of the FPC and the nickel sheet are arranged in an integral forming structure, so as to reduce the welding process between the main structure of the FPC and the nickel sheet. However, the collection end of the integral forming FPC needs to be fixed on the current collecting piece by welding, which still has the problems of poor welding and low welding efficiency. SUMMARY

[0005] The utility model aims at overcoming the defects in the prior art and provides a direct sampling type integrated busbar convenient for repair.

[0006] To achieve the above purpose, the utility model discloses a direct sampling type integrated busbar convenient for repair, which comprises a support, a flexible printed circuit board arranged on the support, a plurality of current collecting pieces and a plurality of screws.

[0007] The flexible printed circuit board comprises a base material, a positive insulation protective film and a back insulation protective film, the base material comprises an integral forming base material main body and a plurality of collection branches, the free end of each collection branch is a collection end, a first through hole is arranged on the collection end, a threaded hole is arranged on each current collecting piece, one screw passes through one first through hole and is screwed into the corresponding threaded hole, and the screw head of the screw abuts against the collection end, and the positive insulation protective film and the back insulation protective film cover the base material.

[0008] Preferably, the ratio of the cross-sectional area of the first through hole to the cross-sectional area of the collection end is 0.8-0.9.

[0009] Preferably, a gasket is sleeved on the screw and located above the collecting end, a second through hole is arranged at the middle position of the gasket for the screw to pass through, and the sectional area of the gasket is larger than that of the screw head.

[0010] Preferably, the gasket is made of insulating material.

[0011] Preferably, the positive insulating protective film completely covers the top surface of the substrate, and the negative insulating protective film covers the bottom surface of the substrate and exposes the bottom surface of the collecting end.

[0012] Preferably, a plurality of mounting grooves are arranged on the bracket, a buckle is arranged on the inner side wall of each mounting groove, and one busbar is arranged in one mounting groove and fixed by the buckle.

[0013] Preferably, third through holes are arranged on both sides of the bracket at the root position of the buckle.

[0014] Preferably, a plurality of positioning columns are arranged on the bracket, and a plurality of fourth through holes are arranged on the flexible printed circuit board and limitedly matched with the plurality of positioning columns.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The substrate main body and the collecting branch are an integrated flexible printed circuit board substrate, a first through hole is arranged at the collecting end, a threaded hole is arranged on each busbar, one screw passes through one first through hole and is screwed to the corresponding threaded hole, so that the flexible printed circuit board can be fixed on the busbar. After the screw is locked, the screw head of the screw abuts against the collecting end, and the collecting end can be tightly attached to the busbar, which ensures the electrical connection effect of the two and improves the product yield. The flexible printed circuit board and the busbar are fixed by the screw, the structure is simple, the process difficulty is low, and the assembly is convenient. When maintenance is needed, only the screw needs to be unscrewed, so that the repair is convenient, and the problem that the repair is difficult or even impossible due to the welding method in the prior art is avoided.

[0017] The substrate is an integrated substrate main body and a plurality of collecting branches, and the free end of each collecting branch is a collecting end connected with the busbar, so that the collecting end can be welded with the busbar, and the traditional nickel sheet is cancelled. Compared with the traditional nickel sheet collecting structure, the process of connecting the nickel sheet with the flexible printed circuit board is reduced, the process difficulty is reduced, the problem of poor welding in the welding process is avoided, and the reliability and production efficiency of the battery module are improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic view of the direct collection type integrated busbar for the embodiment convenient for repair;

[0019] Figure 2 It is Figure 1A schematic diagram of a three-dimensional exploded structure of a direct-sampling type integrated busbar convenient for repair;

[0020] Support 100; mounting groove 110; buckle 120; positioning column 130; third through hole 140;

[0021] Flexible printed circuit board 200; base material 210; base material body 220; collection branch 230; collection end 240; first through hole 250; fourth through hole 260;

[0022] Busbar 300; threaded hole 310;

[0023] Screw 400. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the utility model will be further described in detail below by combining with the drawings and specific embodiments.

[0025] A direct-sampling type integrated busbar convenient for repair, see Figures 1-2 , comprising a support 100, a flexible printed circuit board 200 arranged on the support 100, a plurality of busbars 300 and a plurality of screws 400. Among them, the flexible printed circuit board 200 comprises a base material 210, a positive insulating protective film and a back insulating protective film, the base material 210 comprises an integrally formed base material body 220 and a plurality of collection branches 230, the free end of each collection branch 230 is a collection end 240, the collection end 240 is provided with a first through hole 250, each busbar 300 is provided with a threaded hole 310, one screw 400 passes through one first through hole 250 and is screwed to the corresponding threaded hole 310, so that the flexible printed circuit board 200 can be fixed to the busbar 300. After the screw 400 is locked, the head of the screw 400 abuts against the collection end 240, and the collection end 240 can be tightly attached to the busbar 300, which ensures the electrical connection effect of the two and improves the product yield. By fixing the flexible printed circuit board 200 and the busbar 300 through the screw 400, the structure is simple, the process difficulty is low, and the assembly is convenient. At the same time, when maintenance is needed, only the screw 400 needs to be unscrewed, which is convenient for repair and avoids the problem that the repair is difficult or even impossible due to the use of welding in the prior art. The base material 210 is an integrally formed base material body 220 and a plurality of collection branches 230, and the free end of each collection branch 230 is a collection end 240 connected with the busbar 300. In this way, only the collection end 240 needs to be welded with the busbar 300, and the traditional nickel sheet is cancelled. Compared with the traditional nickel sheet collection structure, the process of connecting the nickel sheet with the flexible printed circuit board 200 is reduced, the process difficulty is reduced, the problem of poor welding that may occur in the welding process is avoided, and the reliability and production efficiency of the battery module are improved.

[0026] The positive and negative insulation protective films (not shown in the figure) are wrapped around the substrate 210, and are wrapped around the positive side of the substrate 210 by using the existing film wrapping process. This is the prior art, and will not be described here.

[0027] In this embodiment, the ratio of the cross-sectional area of the first through hole 250 to the cross-sectional area of the collection end 240 is 0.8-0.9, so that the strength of the collection end 240 can be ensured, and the collection end 240 also has the best collection effect.

[0028] In this embodiment, a gasket (not shown in the figure) is sleeved on the screw 400 above the collection end 240. The gasket is provided with a second through hole in the middle position for the screw 400 to pass through. The cross-sectional area of the gasket is greater than the cross-sectional area of the head of the screw 400. During assembly, the gasket is first sleeved on the screw 400, and then the screw 400 passes through the first through hole 250 until it is screwed with the threaded hole 310. After assembly is completed, the collection end 240 is pressed by the gasket. The cross-sectional area of the gasket is configured to be greater than the cross-sectional area of the head of the screw 400, so that the gasket can completely press the collection end 240, and the collection end 240 can fully contact the busbar 300, which can improve the electrical connection effect between the collection end 240 and the busbar 300.

[0029] Preferably, the material of the gasket is an insulating material, such as hard plastic, so that the top of the collection end 240 can be insulated and protected, which improves the safety of use and also provides dust protection.

[0030] In this embodiment, the positive insulation protective film completely wraps the top surface of the substrate 210, which can further insulate and protect the top surface of the collection end 240, further improving the safety of use. The negative insulation protective film wraps the bottom surface of the substrate 210 and exposes the bottom surface of the collection end 240, so that it can contact the busbar 300 to achieve electrical connection.

[0031] In this embodiment, the bracket 100 is provided with a plurality of mounting grooves 110. The inner side wall of each mounting groove 110 is provided with a buckle 120. One busbar 300 is installed in one mounting groove 110 and is fixed by the buckle 120. The busbar 300 is fixed by the buckle 120. When maintenance is needed, the busbar 300 can be removed from the mounting groove 110. Compared with the connection mode of fixing the busbar 300 by the hot riveting process in the prior art, the maintenance is more convenient.

[0032] The bracket 100 is provided with a third through hole 140 at both sides of the root position of the buckle 120, which can improve the elastic deformation ability of the buckle 120, and is more convenient for assembly and disassembly of the busbar 300.

[0033] In the embodiment, the support 100 is provided with a plurality of positioning columns 130, and the flexible printed circuit board 200 is provided with a plurality of fourth through holes 260 in position limiting cooperation with the plurality of positioning columns 130, so that the flexible printed circuit board 200 can be positioned on the support 100 through the plurality of positioning columns 130.

[0034] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A direct sampling integrated busbar facilitating repair, characterized in that: The bracket, the flexible printed circuit board, the plurality of busbars and the plurality of screws are included. The flexible printed circuit board includes a substrate, a front insulating protective film and a back insulating protective film, the substrate includes a substrate main body and a plurality of collection branches, a free end of each collection branch is a collection end, a first through hole is arranged on the collection end, a threaded hole is arranged on each busbar, one screw passes through one first through hole and is screwed into a corresponding threaded hole, and a screw head of the screw abuts against the collection end, and the front insulating protective film and the back insulating protective film wrap the substrate.

2. The direct-plating integrated busbar convenient for repair according to claim 1, characterized in that: A ratio of a cross-sectional area of the first through hole to a cross-sectional area of the collection end is 0.8-0.

9.

3. The direct-plating integrated busbar convenient for repair according to claim 1, characterized in that: A gasket is arranged on the screw above the collection end, a second through hole is arranged at a middle position of the gasket for the screw to pass through, and a cross-sectional area of the gasket is greater than that of the screw head.

4. The direct-plating integrated busbar convenient for repair according to claim 3, characterized in that: The gasket is made of an insulating material.

5. The direct-plating integrated busbar convenient for repair according to claim 1, characterized in that: The front insulating protective film completely wraps a top surface of the substrate, and the back insulating protective film wraps a bottom surface of the substrate and exposes a bottom surface of the collection end.

6. The direct-plating integrated busbar convenient for repair according to claim 1, characterized in that: A plurality of mounting grooves are arranged on the bracket, an inner side wall of each mounting groove is provided with a buckle, one busbar is mounted in one mounting groove and is fixed by the buckle.

7. The direct-plating integrated busbar convenient for repair according to claim 6, characterized in that: Third through holes are arranged on both sides of the bracket at a root position of the buckle.

8. The direct-plating integrated busbar convenient for repair according to claim 1, characterized in that: A plurality of positioning columns are arranged on the bracket, and a plurality of fourth through holes are arranged on the flexible printed circuit board and limit the plurality of positioning columns.

Images