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Formation technology of lithium ion batteries

A lithium-ion battery and battery technology, applied in the direction of non-aqueous electrolyte battery, electrolyte battery manufacturing, sustainable manufacturing/processing, etc., can solve the problems of low production efficiency of lithium batteries, affecting battery performance, low equipment utilization rate, etc., and achieve improvement The effect of battery rate performance, reduction of production process, and reduction of production cycle

Active Publication Date: 2016-11-02
HUBEI JINQUAN NEW MATERIALS CO LTD
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Problems solved by technology

[0004] At present, the actual process is as follows: after the battery is filled with liquid, let it stand at room temperature for 24 hours, and then stand at 45°C for 24 hours, then form it at room temperature, and then leave it at 45°C for 24 hours, then replenish the liquid again, and finally divide the volume. The current formation process has a long production cycle and equipment Low utilization rate, low production efficiency of lithium batteries, gas production during the formation process, battery swelling, poor reaction interface, affecting battery performance

Method used

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  • Formation technology of lithium ion batteries

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Embodiment Construction

[0024] 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, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] 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. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of ill...

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Abstract

The invention discloses formation technology of lithium ion batteries. The technology comprises the following steps: first liquid injection is carried out for 80-90% of a semi-finished product battery, and a first pretreated battery is obtained; the first pretreated battery is permitted to stand for 10-14 hours at room temperature, and a second pretreated battery is obtained; the second pretreated battery is transferred to a baking oven at 45 DEG C for 4-8 hours, and a third pretreated battery is obtained; formation is carried out for the third pretreated battery in a condition with a negative pressure at 45 DEG C, wherein the negative pressure is 80-90kpa, formation time is 3 hours, and a fourth pretreated battery is obtained; a forth pretreated battery is transferred to a baking oven at 45 DEG C for 10-14 hours, and a fifth pretreated battery is obtained; secondary liquid injection is carried out for 10-20% of a fifth pretreated battery, and a sixth pretreated battery is obtained; a capacity grading test is carried out for a six pretreated battery, and a battery is obtained. The formation technology of lithium ion batteries solves the problem that gas is generated in the prior formation technology of lithium ion batteries; swelling of batteries is controlled, reaction interfaces are optimized, and performance of batteries is improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium-ion battery formation process. Background technique [0002] Due to the high specific energy and high specific power characteristics of lithium-ion batteries, whether it is a hybrid electric vehicle that requires a high specific power battery, a plug-in hybrid electric vehicle that requires a battery with both energy and power, or a pure battery that requires a high specific energy battery Electric vehicles are the most ideal choice at present. Therefore, power lithium-ion batteries have become the key technology and core industry in the implementation of new energy vehicle plans, and more and more car manufacturers choose to use lithium-ion batteries as power batteries for electric vehicles. [0003] Formation is an important process in the production process of lithium batteries. During formation, a passivation layer is formed on the surface of the negative electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCH01M10/058Y02E60/10Y02P70/50
Inventor 李明邹友生黄斯吕正中刘金成
Owner HUBEI JINQUAN NEW MATERIALS CO LTD
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