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Electrode tab structure for lithium ion power battery

A power battery and lithium-ion technology, which is applied in the field of lithium-ion battery tab structure, can solve problems such as increased labor costs and material costs, loss of circuit protection for batteries, and increased battery safety hazards, and achieves good fuse protection and structure Reasonable and low-cost effect

Inactive Publication Date: 2015-11-04
WUXI BAISHIJIE METAL PROD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the external protection circuit component of the battery encounters component connection damage, open circuit or poor heat transfer, the electronic component does not sense in time, and the battery core loses circuit protection, which increases the safety hazard of the battery.
China's patents CN204257738 and CN201320239618 both proposed a method of welding an overcurrent fuse on the lug. Although this method has played a role in safety protection, it is troublesome in actual production and requires increased labor and material costs. Under the 0.1mm thick rubber block, there is also a risk of being pierced during hot pressing

Method used

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  • Electrode tab structure for lithium ion power battery
  • Electrode tab structure for lithium ion power battery
  • Electrode tab structure for lithium ion power battery

Examples

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Effect test

Embodiment 1

[0021] The invention provides a tab structure for a power lithium-ion power battery such as figure 1 As shown, the specific structure is:

[0022] It includes a metal conductor strip 3 and a tab rubber block 2. The tab tab rubber block 2 is two upper and lower pieces, which are wrapped around the metal conductor strip 3. The metal conductor strip is an aluminum strip, and the conductor strip is provided with a fuse 1, which is located on the The part where the metal conductor strip 3 is in contact with the lug rubber block 2; the fuse part 1 has a Z-shaped structure, the lug rubber block 2 completely covers the fuse part, and the edge of the special-shaped fuse part 1 structure reaches the edge of the lug rubber block 2 The distance is greater than 1mm to protect the battery when the current is too large.

Embodiment 2

[0024] The invention provides a tab structure for a power lithium-ion power battery such as figure 2 As shown, the specific structure is:

[0025] It includes a metal conductor strip 3 and a tab rubber block 2. The tab tab 2 is two upper and lower pieces, which are wrapped around the metal conductor strip 3. The metal conductor strip 3 is an aluminum strip, and the conductor strip 3 is provided with a fuse part 1. It is located at the part where the metal conductor strip 3 is in contact with the tab rubber block 2; the fuse part 1 is an O-shaped structure, the tab rubber block 2 completely covers the fuse part 1, and the edge of the special-shaped fuse part 1 structure reaches the tab rubber block 2 The distance between the edges is greater than 1mm to protect the battery when the current is too large.

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Abstract

The invention relates to an electrode tab structure for a lithium ion power battery. The electrode tab structure comprises a metal conductor belt and an electrode tab rubber block, wherein the metal conductor belt is wrapped by the electrode tab rubber block in an encircling manner; a fusing part is arranged on the metal conductor belt and is positioned at the part, where the metal conductor belt is contacted with the electrode tab rubber block; the fusing part is a specially-shaped structure; the fusing part is completely wrapped by the electrode tab rubber block so that the battery can be protected when current is too high; and the fusing part is a Z-shaped or O-shaped structure processed from the metal conductor belt. The electrode tab structure is simple and easy to process; additional materials are unnecessary to add; sparks cannot be generated while fusing; and the electrode tab structure disclosed by the invention is an electrode tab having an overload self-fusing function.

Description

technical field [0001] The invention relates to a tab structure of a lithium ion battery, in particular to a tab structure for a power lithium ion power battery. Background technique [0002] With the extensive use of lithium-ion batteries in electric vehicles, the energy density of the battery is very high, and the safety of the battery is also required to be higher, especially if the battery capacity is greater than 8AH. If the battery is short-circuited due to improper use, the internal humidity of the battery A sharp rise will cause the battery to bulge, the aluminum-plastic film to burst, the electrolyte to leak, and even the battery to catch fire when it is put away. If the power supply can be cut off in time when a short circuit occurs, the battery will not bulge and rupture, and secondary hazards will not occur. In order to protect the safety of the battery, a protective circuit board is generally installed outside the battery cell. When the battery is short-circui...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01M2/34H01M50/533H01M50/534H01M50/583
CPCH01M10/0525H01M50/531H01M50/572Y02E60/10
Inventor 庞兴兵殷泉海曾萍
Owner WUXI BAISHIJIE METAL PROD TECH
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