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Secondary battery

A secondary battery and bare cell technology, applied in the field of secondary batteries, can solve problems affecting battery performance, damage, etc., and achieve the effect of improving performance and prolonging service life

Active Publication Date: 2016-05-18
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a secondary battery, which overcomes the problem that the parts connected to the tabs in the battery are connected by welding, and the resulting welding marks are easy to cause certain damage to the bare cell or the tab during assembly or shaking of the bare cell. damage, which in turn affects the performance of the battery

Method used

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Embodiment

[0055] figure 1 It is a schematic diagram of the overall structure of an embodiment of the secondary battery of the present invention, figure 2 It is a cross-sectional view of an embodiment of the secondary battery of the present invention, such as figure 1 and figure 2 As shown, the secondary battery of this embodiment may include: a top cover sheet 11, an explosion-proof valve 12, a first pole, a second pole, a tab backing plate 13, a bare cell 14, a first tab 17 and a second pole. dipole ear 18.

[0056] There are two poles for outputting electric energy to the outside in the secondary battery, one is the positive pole and the other is the negative pole. The secondary battery in this embodiment has two poles, which are respectively the first pole and the second pole, both of which are arranged on the top cover sheet 11. The first pole can be a positive pole or a negative pole. ground, and the second pole is a negative pole or a positive pole.

[0057] Since the secon...

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PUM

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Abstract

The invention provides a secondary battery. The secondary battery comprises a top cap piece, a first polar column, a second polar column, a tab substrate, a naked battery cell, a first tab and a second tab. Both the first polar column and the second polar column are arranged on the top cap piece. A tab bracket is of a long-strip-shaped plate structure. The tab substrate is located between the top cap piece and the naked battery cell. The first tab comprises a connecting portion, a folding portion and a welding portion. The connecting portion is located on the upper side of the tab substrate. The welding portion is located on the lower side of the tab substrate. The connecting portion and the naked battery cell are connected. The welding portion and the first polar column are connected. The folding portion is wound around the tab substrate to connect the connecting portion with the welding portion. The second polar column is connected with the naked battery cell through the second tab. According to the secondary battery, physical isolation between the naked battery cell and the connecting portion of the tab and welding marks generated when the secondary battery and the tab are welded is achieved, the performance of the battery is improved, and then the effect that the service life of the battery is prolonged is achieved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a secondary battery. Background technique [0002] With the development of modern society and the enhancement of people's awareness of environmental protection, more and more new energy sources have been developed and utilized, such as wind energy and solar energy. After converting energy such as wind energy and solar energy into electrical energy, it is stored in batteries and used in various fields of life. For example, electric vehicles that use electric energy as power, energy storage power stations that store electric energy, etc., generally require the use of large-capacity power batteries as power sources. [0003] A secondary battery generally includes a battery cell, a metal case for containing the battery cell, and a battery top cover. The top of the battery cell is provided with a positive pole tab, a negative pole tab, and a pole. When assembling, firstly weld the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/20H01M2/26H01M50/103H01M50/15H01M50/176H01M50/50H01M50/502H01M50/533H01M50/536H01M50/55H01M50/553H01M50/566
CPCH01M50/50H01M50/553H01M50/15H01M50/55H01M50/176H01M50/536H01M50/103H01M50/566H01M50/533H01M10/0431Y02E60/10Y02P70/50H01M50/383H01M2220/20
Inventor 郭剑李全坤邓平华王鹏朱凌波迟庆魁
Owner CONTEMPORARY AMPEREX TECH CO