Tab for battery, lithium ion battery and preparation method of lithium ion battery

A technology of lithium-ion batteries and tabs, which is applied in the manufacture of electrolyte batteries, secondary batteries, battery pack components, etc., can solve problems such as short circuit, fire and explosion, achieve less metal content, reduce the probability of fire and explosion, and directly contact Likelihood-Reducing Effects

Pending Publication Date: 2019-09-10
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The copper foil and aluminum foil of the prior art, that is, the foil material, not only produces a large amount of metal dust during the welding process, but also uses the foil material in the puncture test, such as Figure 5 As shown, the foil is bent under force, resulting in direct contact between the positive and negative electrodes and short circuit, causing fire and explosion events.

Method used

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  • Tab for battery, lithium ion battery and preparation method of lithium ion battery
  • Tab for battery, lithium ion battery and preparation method of lithium ion battery
  • Tab for battery, lithium ion battery and preparation method of lithium ion battery

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Embodiment Construction

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

[0047] Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0048] Such as figure 1 As shown, the present embodiment provides a tab for a battery, including a PET layer 12 and a metal foil layer 11 , and the metal foil layers 11 are respectively arranged on opposite sides o...

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Abstract

The invention relates to the technical field of lithium ion batteries, in particular to a tab for a battery, the lithium ion battery and a preparation method of the lithium ion battery. The tab for the battery comprises a PET layer and metal foil layers, wherein the metal foil layers are arranged on the two opposite sides of the PET layer respectively. The tab composed of the metal foil layers andthe PET layer has the advantages of being high in bending strength, light in weight and low in metal content. During piercing experiments, the possibility of direct contact between a positive electrode and a negative electrode is reduced, so that the probability of fire explosion is reduced; during welding, generated metal dust is little, so that the environment of a production workshop is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a tab used for batteries, a lithium ion battery and a preparation method for the lithium ion battery. Background technique [0002] Lithium-ion battery technology is one of the key technologies for the development of electric vehicles. In the main structure of most lithium batteries currently on the market, ultra-thin electrolytic metal foils are used as positive and negative electrode conductors. The active material in the battery is in full contact, and the ultra-thin electrolytic metal foil is usually made of copper foil and aluminum foil with low internal resistance and good ductility. Among them, the positive electrode adopts ultra-thin electrolytic aluminum foil, and the negative electrode adopts ultra-thin electrolytic copper foil. The foil structure of the lead-out part of the positive and negative cells is called a tab. [0003] The copper foil and alumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M10/0525H01M10/058
CPCH01M10/0525H01M10/058H01M50/531Y02E60/10Y02P70/50
Inventor 郑赫赵凯金正贤滕立杰徐春龙
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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