sealed battery

Abstract

The sealed battery disclosed in the present invention is composed of a battery casing, a battery cover, and a battery electrode group accommodated in the battery casing and the battery cover. There is an insulator between the positive pole piece and the negative pole piece. Both the positive pole piece and the negative pole piece are composed of a base body, a tab and a current guide strip for conducting electricity. The tabs and the current guide strip of the positive pole piece and the negative pole piece are respectively located On both sides of the battery pole group, one end of the base body is connected to one end of the tab, and a positioning hole is respectively opened on both sides of the other end of the tab. between the holes. The invention has the characteristics of small size, good conduction effect and large battery capacity.

Description

technical field [0001] The present invention relates to a sealed battery. Background technique [0002] For example, a square battery disclosed in Chinese invention patent 201310058048.3 belongs to a typical sealed battery, including a battery case, a battery cover, and a battery electrode group contained in the battery case and battery cover. Figure 8-1 As shown in 6, the pole group is formed by overlapping the positive pole piece and the negative pole piece, and a diaphragm or separator is arranged between the positive pole piece and the negative pole piece for insulation. The positive pole piece and the negative pole piece have the same structure, both Including base body, tabs and guide strips for conduction, the base body is coated with active material, one side of the base body is welded to one side of the tabs, and the other side of the tabs is welded to the guide plate. This sealed battery integrates The electrode group formed by overlapping the multi-layer positive...

AI Technical Summary

Problems solved by technology

[0003] In the current sealed battery market, the technology is developing rapidly, the volume of the battery is continuously reduced, and the carrying capacity is continuously increased. However, under the existing basic structural system of the sealed battery, the volume of the battery is close to the limit. Therefore, how to re- Further reducing the battery volume while ensuring the conductive effect, or further improving the battery output capacity under the same volume is the main technology research and development competition point of major manufacturers, so look for a breakthrough point inside the battery to reduce the battery volume or improve the battery's power carrying capacity Become the key to improving production efficiency

[0004] The above-mentioned sealed batteries generally increase the battery capacity by increasing the electrode group and expanding the battery volume. Due to the corresponding increase in the production cost due to the volume expansion, it is obvious that we need another breakthrough.

Images