Positive electrode terminal lead-out structure of lithium ion battery and preparation method for positive electrode terminal lead-out structure

Abstract

The invention discloses a positive electrode terminal lead-out structure of a lithium ion battery and a preparation method for the positive electrode terminal lead-out structure. The positive electrode terminal lead-out structure comprises a battery shell and a negative electrode terminal. According to the positive electrode terminal lead-out structure, the battery shell is combined with the negative electrode terminal; through experiment optimization, the problem of seepage of the lithium ion battery can be effectively solved; and the structure is reasonable, a process is simple, the production cost and the machining difficulty can be lowered, and the popularization and application in production are facilitated. In a conventional negative electrode lead-out structure, accessories are generally the battery shell, studs, sealing gaskets, pressing sheets, nuts and the like, various accessories are required, and the cost is relatively high. In the positive electrode terminal lead-out structure, only two accessories, namely, the negative electrode terminal and the battery shell, are required. Convex points are stamped at the bottom of a steel shell, and the negative electrode terminal is welded at the bottom of the steel shell by using an energy storage butt-weld machine, so that the negative electrode lead-out terminal of the lithium ion battery is quickly and simply assembled. The bottom of the steel shell is seamless and holeless, and the negative electrode terminal is butt-welded at the bottom of the steel shell, so that an electrolyte solution of the battery impossibly seeps out of the negative electrode terminal.

Description

【Technical field】 [0001] The invention relates to the technical field of lithium-ion batteries, in particular to the technical field of a lithium-ion battery negative terminal lead-out structure and a preparation method thereof. 【Background technique】 [0002] Lithium-ion battery is a new type of rechargeable battery developed in the past ten years. It has high specific energy, no memory effect, green environmental protection, and its discharge voltage is three times that of nickel-cadmium and nickel-metal hydride batteries. A new generation of batteries with high versatility. Possessing the three major advantages of the current battery industry development, it is called "the most promising chemical power source" by people, so it has been widely noticed by people once it came out, and its development is very rapid. At present, the industrialization in Japan and the United States is doing very well. my country is the earliest developing country in the industrialization and ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems in the prior art, and propose a lithium-ion battery negative terminal lead-out structure and its preparation method, which can effectively solve the problem of lithium-ion battery seepage, has a reasonable structure, simple process, and can reduce production costs and Difficulty in processing, conducive to popularization and application in production

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