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Battery cell and preparation method thereof

A cell and pole piece technology, applied in the field of cell and its preparation, can solve the problems of increased lamination error, low lamination efficiency, etc., and achieves the effects of not easy to dislocate, reducing the number of laminations, and beneficial to electrochemical performance.

Active Publication Date: 2020-12-04
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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  • Battery cell and preparation method thereof
  • Battery cell and preparation method thereof
  • Battery cell and preparation method thereof

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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 a battery cell and a preparation method thereof. The preparation method comprises the following steps of arranging 2N first pole pieces on a diaphragm along the width directionand the length direction of the diaphragm in an array manner, turning over the diaphragm by 180 degrees to cover the first pole piece, arranging the 2N second pole pieces on the diaphragm subjected to primary folding in an array manner in the width direction and the length direction, turning over the diaphragm by 180 degrees to cover the second pole piece, arranging N first pole pieces on the diaphragm subjected to secondary folding in the length direction, carrying out 180-degree cell combination folding once along the center line of the diaphragm in the width direction to form a semi-finished battery cell, and placing a pole piece matched with the polarity of the pole piece at the corresponding position in the semi-finished battery cell on the surface of the semi-finished battery cell,and carrying out 180-degree cell combination folding to form the battery cell. The lamination frequency can be reduced, the lamination error is reduced, and the electrochemical performance of the battery is improved.

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 Applications(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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