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Lithium ion battery structure

A lithium-ion battery and current collector technology, which is applied in the field of power supply, can solve problems such as constraints and increase the risk of battery breakage, and achieve the effects of improved infiltration efficiency, less peeling off, and reduced weight

Inactive Publication Date: 2019-07-30
SHENZHEN XINYUREN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the current collector is too thin, it will increase the risk of interruption in the manufacturing process of the battery cell. Therefore, this technical route for increasing energy density will be greatly restricted in the future.

Method used

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Embodiment Construction

[0022] It should be understood that the specific embodiments described here are only for illustration and are not intended to limit the present invention. The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] see figure 1 , the present invention proposes a lithium-ion battery structure, including porous aluminum foil 2 and porous copper foil 4 as positive and negative current collectors respectively covering the surfaces of both sides of the porous diaphragm 3 to form a current collector-diaphragm composite 10, the current collector-diaphragm The overall pores of the complex are connected. One end of the positive tab and the negative tab are respectively connected to the aluminum foil 2 and the copper foil 4 on both sides of the current collector-diaphragm composite. The current collector-diaphragm composite separates the positive electrode active material coating 1 and the negative electrode active material c...

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Abstract

In a lithium ion battery structure, a porous aluminum foil and a porous copper foil which are used as a positive current collector and a negative current collector respectively cover surfaces of two sides of a porous diaphragm to form a current collector-diaphragm composite body, an integral hole passage of the current collector-diaphragm composite body has communication, one end of a positive taband one end of a negative tab are connected with the aluminum foil and the copper foil of the current collector-diaphragm composite body, a positive active material coating layer and a negative active material coating layer at two sides are spaced by the current collector-diaphragm composite body, adjacent surfaces are closely contacted to form a periodic lamination structure of the positive active material coating layer, the composite body, the negative active material coating layer, the composite body and the positive active material coating layer. By the lithium ion battery structure, theperformance and the manufacturing quality of a current commercial lithium ion battery can be improved.

Description

technical field [0001] The invention belongs to the technical field of power supplies, and in particular relates to a lithium-ion battery structure. Background technique [0002] Lithium-ion batteries are widely used in consumer electronics and new energy fields due to their advantages of high energy density, high power performance, no memory and low self-discharge rate. The energy density and power performance of lithium-ion batteries not only depend on the internal electrodes and electrolyte materials, but also are closely related to the structure of the electrochemical system. In terms of battery safety, the battery structure also has a decisive impact. For example, the explosion of the Samsung mobile phone Note 7 was caused by an internal short circuit caused by excessive compression during the design of the battery structure, which caused thermal runaway. [0003] At present, there are three main overall configurations of lithium-ion batteries that are relatively matur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/80H01M4/66H01M2/26H01M10/0585H01M10/0525H01M50/531
CPCH01M4/808H01M4/661H01M10/0585H01M10/0525H01M50/531Y02E60/10Y02P70/50
Inventor 杨志明周华民陶波黄志高周军张云
Owner SHENZHEN XINYUREN TECH
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