Cylindrical battery pole terminal structure with split shell

Abstract

The utility model relates to the technical field of cylindrical batteries, in particular to a cylindrical battery pole end structure with a split shell. Comprising a pole, a wafer is riveted and fixed to the outer side of the pole, a sealing gasket is arranged between the pole and the wafer, the bottom of the pole is welded and fixed to the center of a current collecting disc, an insulating sheet is buckled on the current collecting disc, the inner side of the insulating sheet extends to the position between the wafer and the current collecting disc, and a plurality of hollow holes are formed in the outer side of the insulating sheet. The collector plate and the tab of the roll core are welded and fixed at the hollow hole position, the round sheet, the insulating sheet, the pole, the collector plate and the roll core are buckled into the shell, the pole upwards penetrates through the through hole and extends to the outer side of the top of the shell, and laser welding is performed between the shell and the round sheet. The whole process is visual in operation, the operation difficulty is reduced, positioning is easy, the machining efficiency and the qualified rate are improved, and the machining consistency and the sealing performance are easy to guarantee; and the pole and the collector plate are subjected to laser welding before entering the shell, so that metal scraps generated by welding in the battery are avoided, and the stable and reliable electrical performance in the battery is ensured.

Description

Technical field:

[0001] The utility model relates to the technical field of cylindrical batteries, in particular to a cylindrical battery pole terminal structure with a split shell. Background technology:

[0002] At present, the pole end structure of cylindrical batteries generally includes a pole and a shell. The inner and outer sides of the pole are fixed to the shell by rivets, and a sealing gasket is provided between the pole and the shell for sealing and insulation. The pole also needs to be welded and fixed to the collector plate. The shell is now an integral structure. When the pole is riveted to the shell, the tooling needs to extend into the shell, which is difficult to operate, requires more precise positioning, has low processing efficiency and pass rate, and is difficult to ensure processing consistency and sealing. In addition, when welding between the pole and the collector plate, more metal debris will be generated, which will affect the internal electrical performance of the battery and cause the problem of unstable internal resistance of the battery.

[0003] In summary, the above-mentioned problems with the cylindrical battery terminal structure have become technical challenges that urgently need to be solved in the industry. Utility model content:

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a cylindrical battery pole end structure with a split shell, which solves the problems of difficult operation, difficulty in ensuring processing consistency and sealing when riveting the pole and the shell in the past, and solves the problem of metal debris generated inside the battery when welding the pole and the collecting plate in the past.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A cylindrical battery pole end structure with a split shell comprises a pole, a disc is riveted and fixed on the outer side of the pole, a sealing gasket is arranged between the pole and the disc, the bottom of the pole is welded and fixed to the center of a current collecting disk, an insulating sheet is buckled on the current collecting disk, the inner side of the insulating sheet extends between the disc and the current collecting disk, a plurality of holes are arranged on the outer side of the insulating sheet, the current collecting disk and the pole ears of a winding core are welded and fixed at the hole positions, the outer shell buckles the disc, the insulating sheet, the pole, the current collecting disk and the winding core therein, a through hole is arranged in the center of the outer shell that matches the pole, the pole passes through the through hole upward and extends to the outer side of the top of the outer shell, and laser welding is performed between the outer shell and the disc.

[0007] The disc is made of the same material as the shell.

[0008] The sealing gasket is a split structure, comprising an upper sealing gasket and a lower sealing gasket.

[0009] A sealing ring is arranged between the upper sealing gasket and the lower sealing gasket.

[0010] The upper sealing gasket and the lower sealing gasket are used to isolate the short circuit mode between the pole and the wafer.

[0011] The insulating sheet is used to isolate the current collecting disc from the short circuit mode between the housing and the disc.

[0012] The overlapping parts of the shell and the disc are subjected to laser penetration welding.

[0013] A slot matching the shape of the current collecting plate is provided at the bottom of the insulating sheet.

[0014] The utility model adopts the above scheme and has the following advantages:

[0015] By riveting the pole and the disc, and finally laser welding the disc to the shell, the whole process is visualized, the processing is flexible, the operation difficulty is reduced, the positioning is easy, the processing efficiency and the qualified rate are improved, and the processing consistency and sealing are easy to ensure; the pole and the collecting plate are laser welded before entering the shell, which avoids the generation of metal debris during welding inside the battery and ensures that the internal electrical performance of the battery is stable and reliable. Description of the drawings:

[0016] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the pole and the disc before riveting.

[0018] Figure 3 It is a structural schematic diagram of the insulating sheet of the utility model.

[0019] In the figure, 1, pole, 2, disc, 3, collecting plate, 4, insulating sheet, 5, perforation, 6, winding core, 7, shell, 8, upper sealing gasket, 9, lower sealing gasket, 10, sealing ring. Specific implementation method:

[0020] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0021] like Figure 1-3 As shown, a cylindrical battery pole end structure with a split shell includes a pole 1, a disc 2 is riveted and fixed on the outer side of the pole 1, a sealing gasket is provided between the pole 1 and the disc 2, the bottom of the pole 1 is welded and fixed to the center of the current collecting plate 3, an insulating sheet 4 is buckled on the current collecting plate 3, the inner side of the insulating sheet 4 extends between the disc 2 and the current collecting plate 3, a plurality of holes 5 are provided on the outer side of the insulating sheet 4, the current collecting plate 3 and the pole ears of the winding core 6 are welded and fixed at the positions of the holes 5, the outer shell 7 buckles the disc 2, the insulating sheet 4, the pole 1, the current collecting plate 3 and the winding core 6 therein, a through hole is provided in the center of the outer shell 7 to match the pole 1, the pole 1 passes through the through hole upward to the outer side of the top of the outer shell 7, and the outer shell 7 and the round piece 2 are laser welded.

[0022] The disc 2 and the housing 7 are made of the same material.

[0023] The sealing gasket is a split structure, including an upper sealing gasket 8 and a lower sealing gasket 9, so as to facilitate the installation of the wafer 2.

[0024] A sealing ring 10 is provided between the upper sealing gasket 8 and the lower sealing gasket 9 to play a role in sealing and leak-proofing.

[0025] The upper sealing gasket 8 and the lower sealing gasket 9 are used to isolate the short circuit mode between the pole 1 and the wafer 2 .

[0026] The insulating sheet 4 is used to isolate the current collecting plate 3 from the short circuit mode between the housing 7 and the disc 2 .

[0027] The overlapping portion of the shell 7 and the disc 2 is laser-penetrated and welded, and the inner side of the insulating sheet 4 can play an isolating role during welding.

[0028] The bottom of the insulating sheet 4 is provided with a slot that matches the shape of the current collecting plate 3 and is used to install and position the current collecting plate 3.

[0029] Working principle:

[0030] During assembly, the top rivet piece of the pole 1 is initially in a horizontal state, and the bottom rivet piece of the pole 1 is initially in a vertical state. First, the upper sealing gasket 8 is put on the outside of the pole 1, and then the disc 2 is put on the outside of the upper sealing gasket 8, and then the lower sealing gasket 9 and the sealing ring 10 are put on the outside of the pole 1 and pressed against the disc 2. Finally, the bottom rivet piece of the pole 1 is turned horizontally by tooling pressure riveting, and the upper sealing gasket 8, the disc 2, the lower sealing gasket 9 and the sealing ring 10 are riveted and fixed together with the top rivet piece. At this time, the assembly of the pole 1 and the disc 2 is completed; then the collecting plate 3 is installed on the insulator The collector plate 3 and the bottom of the pole 1 are laser welded in the slot at the bottom of the edge sheet 4 to form a composite pole, and then the composite pole is placed on the winding core 6, and the laser is passed through the hollow position of the insulating sheet 4 under compression to perform laser welding of the collector plate 3 and the winding core 6; finally, the outer shell 7 is buckled on the pole 1 from top to bottom, and the pole 1 automatically passes upward from the through hole in the middle of the outer shell 7, and the disc 2 is just stuck in the through hole of the outer shell 7 and adheres tightly, and then the overlapping part of the outer shell 7 and the disc 2 is penetrated and welded to complete the assembly of the entire cylindrical battery pole end.

[0031] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

[0032] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A cylindrical battery pole terminal structure with a split housing, characterized in that: It includes a pole, a disc is riveted and fixed on the outer side of the pole, a sealing gasket is provided between the pole and the disc, the bottom of the pole is welded and fixed to the center of the current collecting disk, an insulating sheet is buckled on the current collecting disk, the inner side of the insulating sheet extends between the disc and the current collecting disk, a plurality of holes are provided on the outer side of the insulating sheet, the current collecting disk and the pole ears of the winding core are welded and fixed at the hole positions, the outer shell buckles the disc, the insulating sheet, the pole, the current collecting disk and the winding core, a through hole matching the pole is provided in the center of the outer shell, the pole passes through the through hole upward and extends to the outer side of the top of the outer shell, and laser welding is performed between the outer shell and the disc.

2. The cylindrical battery pole terminal structure with a split housing according to claim 1, characterized in that: The disc is made of the same material as the shell.

3. The cylindrical battery pole terminal structure with a split housing according to claim 1, characterized in that: The sealing gasket is a split structure, comprising an upper sealing gasket and a lower sealing gasket.

4. The cylindrical battery pole terminal structure with a split housing according to claim 3, characterized in that: A sealing ring is arranged between the upper sealing gasket and the lower sealing gasket.

5. The cylindrical battery pole terminal structure with a split housing according to claim 3, characterized in that: The upper sealing gasket and the lower sealing gasket are used to isolate the short circuit mode between the pole and the wafer.

6. The cylindrical battery pole terminal structure with a split housing according to claim 1, characterized in that: The insulating sheet is used to isolate the current collecting disc from the short circuit mode between the housing and the disc.

7. The cylindrical battery pole terminal structure with a split housing according to claim 1, characterized in that: The overlapping parts of the shell and the disc are subjected to laser penetration welding.

8. The cylindrical battery pole terminal structure with a split housing according to claim 1, characterized in that: A slot matching the shape of the current collecting plate is provided at the bottom of the insulating sheet.

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