CN-224232884-U - Battery tab structure

Abstract

The utility model discloses a battery tab structure, which comprises a pole piece, wherein a dressing area is arranged on the pole piece, a tab connection area which is arranged along the length direction of the pole piece is arranged on one side of the dressing area, a tab area is arranged on one side of the tab connection area which is far away from the dressing area, the tab area comprises a plurality of mountain-shaped tabs which are sequentially connected along the length direction of the pole piece, a tab head blank area is arranged between the head end of the tab area and the head end of the pole piece at intervals, and a tab tail blank area is arranged between the tail end of the tab area and the tail end of the pole piece at intervals. The utility model has the beneficial effects that the flat tab is cut into the peak-shaped tab, and the tab head blank area and the tab tail blank area are arranged at the two ends of the pole piece, so that the overlapping thickness of the two ends of the battery core after being kneaded is reduced, the whole volume and the weight of the battery are reduced, the problem of gas expansion possibly generated when the battery is out of control due to heat is effectively reduced, the risk of the battery caused by overheating is reduced, and the safety of the battery is improved.

Inventors

• CUI HONGYUE
• LIN TING
• XU SHAOHUI

Assignees

• 烟台力华电源科技有限公司

Dates

Publication Date

20260512

Application Date

20250519

Claims (6)

1. 1. The battery tab structure is characterized by comprising a pole piece, wherein a dressing area is arranged on the pole piece, a tab connection area which is arranged along the length direction of the pole piece is arranged on one side of the dressing area, a tab area is arranged on one side of the tab connection area which is far away from the dressing area, the tab area comprises a plurality of mountain-shaped tabs which are sequentially connected along the length direction of the pole piece, a tab head blank area is arranged between the head end of the tab area and the head end of the pole piece at intervals, and a tab tail blank area is arranged between the tail end of the tab area and the tail end of the pole piece at intervals.
2. 2. The battery tab structure of claim 1 wherein the peak height of the peak-shaped tab is 5-10mm and the width between the highest points of two adjacent peak-shaped tabs is 15-60mm.
3. 3. The battery tab structure of claim 1 wherein the tab connection region has a height of 1-8mm.
4. 4. The battery tab structure of claim 1 wherein the tab head blank has a length of 200-500mm.
5. 5. The battery tab structure of claim 1 wherein the tab tail void area has a length of 300-500mm.
6. 6. The battery tab structure of claim 1 wherein the auxiliary material region, tab connection region and tab region are integrally formed on the pole piece.

Description

Battery tab structure Technical Field The utility model relates to the technical field of batteries, in particular to a battery tab structure. Background With the wide application of lithium batteries, large cylindrical lithium batteries are rapidly developing by virtue of the advantages of high energy density, good quick charge performance, long cycle life and the like. At present, the traditional large cylindrical lithium battery is usually in a straight shape in the design of the electrode lugs, and the main manufacturing process of the full electrode lugs is to knead the two ends of the manufactured coil core, then weld the electrode flow disc and the sealing piece, and finally fill liquid and form the finished battery. However, when the tabs with straight shapes are flattened, the stacked layers of foils can cause the overlapping thickness of the two ends of the battery core to be larger, so that the overall volume and weight of the battery are increased, and the safety performance of the battery can be influenced. Disclosure of utility model The utility model aims to overcome the defects of the prior art, and provides a battery tab structure, wherein straight tabs are cut into mountain-shaped tabs, and a tab head blank area and a tab tail blank area are arranged at two ends of a pole piece, so that the overlapping thickness of two ends of a battery core after being kneaded is reduced, the whole volume and the weight of a battery are reduced, the problem of gas expansion possibly generated when the battery is out of control due to heat is effectively reduced, the risk of the battery caused by overheating is reduced, and the safety of the battery is improved. The utility model aims at achieving the technical measures that the battery tab structure comprises a pole piece, wherein a dressing area is arranged on the pole piece, a tab connection area which is arranged along the length direction of the pole piece is arranged on one side of the dressing area, a tab area is arranged on one side of the tab connection area which is far away from the dressing area, the tab area comprises a plurality of peak-shaped tabs which are sequentially connected along the length direction of the pole piece, a tab head blank area is arranged between the head end of the tab area and the head end of the pole piece at intervals, and a tab tail blank area is arranged between the tail end of the tab area and the tail end of the pole piece at intervals. In some embodiments, the peak height of the peak-shaped tab is 5-10mm and the width between the highest points of two adjacent peak-shaped tabs is 15-60mm. In some embodiments, the tab connection region has a height of 1-8mm. In some embodiments, the tab head blank has a length of 200-500mm. In some embodiments, the tab tail void area has a length of 300-500mm. In some embodiments, the auxiliary material area, the tab connection area and the tab area on the pole piece are integrally formed. Compared with the prior art, the utility model has the beneficial effects that the straight tab is cut into the peak-shaped tab, and the tab head blank area and the tab tail blank area are arranged at the two ends of the pole piece, so that the overlapping thickness of the two ends of the battery core after being kneaded is reduced, the whole volume and the weight of the battery are reduced, the problem of gas expansion possibly generated when the battery is out of control due to heat is effectively reduced, the risk of the battery caused by overheating is reduced, and the safety of the battery is improved. The utility model is described in detail below with reference to the drawings and the detailed description. Drawings Fig. 1 is a schematic structural view of the present utility model. Wherein, 1, dressing district, 2, utmost point ear connecting region, 3, mountain form utmost point ear, 4, utmost point ear head blank district, 5, utmost point ear afterbody blank district. Detailed Description As shown in fig. 1, a battery tab structure comprises a pole piece, be equipped with dressing district 1 on the pole piece, dressing district 1 is used for coating positive electrode active material/negative electrode active material, and one side of dressing district 1 is equipped with the tab connection district 2 of arranging along pole piece length direction, and one side that dressing district 1 was kept away from to tab connection district 2 is equipped with the tab district, the tab district includes a plurality of peak form tabs 3 that connect gradually along pole piece length direction, and is preferred, and the bottom of two adjacent peak form tabs 3 is connected each other, further, the preferred triangle-shaped tab of peak form tab 3. The pole lug head blank zone 4 is arranged between the head end of the pole lug zone and the head end of the pole piece, the pole lug tail blank zone 5 is arranged between the tail end of the pole lug zone and the tail end of the pole piece, specifically, in t