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Lithium ion battery negative pole piece lithium supplementing device and lithium supplementing method thereof

A technology for lithium-ion batteries and negative pole pieces, which is applied in battery electrodes, negative electrodes, and electrode manufacturing. Wetness is not good and other problems, to achieve the effect of good consistency, product quality and production efficiency, simple process structure

Pending Publication Date: 2021-03-09
惠州赣锋锂电科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to address the above problems and provide a lithium-ion battery negative pole piece lithium replenishment device and a lithium replenishment method thereof. Wetness is not good, resulting in the agglomeration of molten lithium on the coating roller or substrate, resulting in uneven lithium supplement coating and affecting the performance of lithium-ion batteries

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  • Lithium ion battery negative pole piece lithium supplementing device and lithium supplementing method thereof

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Embodiment Construction

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as...

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Abstract

The invention provides a lithium ion battery negative pole piece lithium supplementing device. The lithium ion battery negative pole piece lithium supplementing device comprises an inert atmosphere chamber, a cooling chamber and a containing chamber used for containing a metal liquefaction pool are arranged in the inert atmosphere chamber in a spaced mode, the metal liquefaction pool is arranged in the containing chamber, and an inner cavity of the metal liquefaction pool is a containing cavity used for containing molten metal lithium. A micro-concave roller and a scraper are arranged above the containing cavity, the scraper is arranged on the side portion of the micro-concave roller, the angle between the scraper and the micro-concave roller ranges from 80 degrees to 100 degrees, and tworotating rollers are arranged on the two sides of the micro-concave roller. The lithium supplementing device is simple in structure, can solve the problem that the performance of the lithium ion battery is influenced due to non-uniform lithium supplementing coating caused by agglomeration of molten lithium on a coating roller or a base material due to poor surface wettability of the molten lithium, the base material and a micro concave roller, and is good in lithium supplementing consistency, and the product yield and the production efficiency are greatly improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a lithium-replenishing device for a negative pole piece of a lithium-ion battery and a lithium-replenishing method thereof. Background technique [0002] Due to the advantages of high operating voltage, high energy density, long cycle life, and no memory effect, lithium-ion batteries are widely used in notebook computers, digital products, and mobile communications. [0003] At present, there is a phenomenon in lithium-ion batteries: that is, during the first charge-discharge cycle of lithium-ion batteries, the electrode material and electrolyte react at the solid-liquid phase interface to form a passivation layer covering the surface of the electrode material. It is called "Solid Electrolyte Interface", or SEI film for short. The formation of the SEI film consumes a large amount of lithium ions, which leads to an increase in the irreversible capacity of the firs...

Claims

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Application Information

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IPC IPC(8): H01M4/1395H01M4/04H01M4/38H01M10/0525
CPCH01M4/1395H01M4/0409H01M4/382H01M10/0525H01M2004/027Y02E60/10
Inventor 刘海戈志敏王乾韦向红黎莉危璐雅
Owner 惠州赣锋锂电科技有限公司
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