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Method for preparing lithium ion cell

A lithium ion and cell technology, which is applied in the field of the preparation of stepped lithium ion cells, can solve the problems of low efficiency, difficulty in mass production or continuous high-efficiency production in cell manufacturing processes, and complex cell manufacturing processes. Guarantee the effect of production

Active Publication Date: 2013-10-09
DONGGUAN AMPEREX TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in practice, it is found that the special shape of the above-mentioned batteries makes the cell manufacturing process complex and inefficient, and it is difficult to achieve mass production or continuous high-efficiency production using the existing cell manufacturing process

Method used

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  • Method for preparing lithium ion cell
  • Method for preparing lithium ion cell
  • Method for preparing lithium ion cell

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Embodiment Construction

[0036] In order to make the purpose of the invention, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0037] The batteries that can be prepared by the method for preparing lithium-ion batteries of the present invention are stepped. see Figure 1 to Figure 3 , a kind of stepped cell that can be prepared in the present invention is formed by stacking several groups of pole piece groups 6 of different sizes, wherein each pole piece group 6 includes positive pole pieces 5, negative pole pieces 4 and The separator 3 is spaced between the positive and negative plates 5 and 4 . Two adjacent pole piece groups 6 form steps 8 d...

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Abstract

The invention discloses a method for preparing a lithium ion cell. The method comprises the following steps: 1) coating: coating along the unwinding direction of a current collector coil stock, wherein the number of coating areas is one or multiple, and two side edges of each coating area have uncoated areas as tab forming parts; 2) compacting; 3) pole piece cutting and forming; 4) preparing single cells and half cells; 5) step-like naked cell stacking; and 6) hot-press forming. Compared with the prior art, the method for preparing the lithium ion cell realizes the continuous forming of fillets and tabs and ensures fluency of production and high efficiency through the reasonable arrangement of the coating areas and the uncoated areas, and the production efficiency cannot be greatly reduced due to the special shape of the cell, so that the method is especially suitable for producing various lithium ion battery cells matched with irregular space shapes.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, and more specifically, the invention relates to a preparation method of a stepped lithium ion battery cell. Background technique [0002] Since the arrangement of many electronic components in mobile electronic devices often presents a ladder shape or other irregular shapes, the space left for the battery is not always a regular cuboid. Existing lithium-ion batteries are generally in the shape of a regular cuboid, and when used in mobile electronic devices, part of the internal space is usually wasted. For this reason, the industry proposes to design the battery into a stepped shape to improve the space utilization of the battery part in the mobile electronic device, so that the mobile electronic device with the same size can obtain greater volume and energy performance. [0003] However, it has been found in practice that because of the special shape of the above-mentioned batteries, the ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCH01M10/0525H01M10/0585H01M2220/30Y02E60/10Y10T29/49108Y02P70/50
Inventor 何平方宏新张柏清李满森陈大伟
Owner DONGGUAN AMPEREX TECH
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