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Cell and its preparation method

A battery cell and pole piece technology, which is applied in the field of battery cells and their preparation, can solve the problems of low lamination efficiency and increased lamination error, and achieve the effect of reducing the number of laminations, making it difficult to dislocate, and reducing the risk of winding core short circuit

Active Publication Date: 2021-06-22
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the current Z-shaped stacking method, only one pole piece unit can be stacked at a time, the stacking efficiency is low and it is difficult to break through the technical bottleneck
In addition, when the number of consecutive stacking is large, the probability of lamination errors will increase significantly

Method used

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  • Cell and its preparation method
  • Cell and its preparation method

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Embodiment Construction

[0054] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present application.

[0055] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may 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. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar exp...

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Abstract

The invention discloses an electric core and a preparation method thereof. The preparation method comprises arranging 2N first pole pieces on the diaphragm in an array along the width direction and the length direction of the diaphragm; turning the diaphragm 180° to cover the first pole piece ;Arrange 2N pieces of the second pole piece along the width direction and the length direction on the diaphragm after the first turn; then turn the diaphragm 180° to cover the second pole piece; Place N pieces of the first pole piece along the length direction; perform a 180° core-folding along the center line of the diaphragm width direction to form a semi-finished battery cell; Compatible pole pieces are folded 180° to form a battery core. The invention can reduce the times of stacking, reduce the error of stacking, and improve the electrochemical performance of the battery.

Description

technical field [0001] The invention relates to the technical field of electric core production, in particular to an electric core and a preparation method thereof. Background technique [0002] Lithium-ion batteries have attracted much attention in the field of mobile power because of their environmental friendliness. Lithium-ion batteries are generally composed of cells, electrolytes, and packaging bags for containing cells and electrolytes. Among them, the battery cell of the lithium-ion battery is mainly composed of a positive pole piece, a negative pole piece, and a diaphragm separating the positive pole piece and the negative pole piece. [0003] At present, the process of preparing batteries mainly includes lamination process and winding process. Compared with the winding lithium-ion battery prepared by the winding process, the stacked lithium-ion battery prepared by the stacking process has the advantages of high energy density, high voltage platform, and small int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0583H01M10/0525
CPCH01M10/0525H01M10/0583Y02E60/10Y02P70/50
Inventor 高冲程辉
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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