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Manufacturing method of cell

A manufacturing method and cell technology, which is applied in secondary battery manufacturing, final product manufacturing, sustainable manufacturing/processing, etc., can solve problems such as pole piece misalignment in the battery core, so as to improve flatness and prevent pole piece misalignment Layers, the effect of improving the safety of use

Active Publication Date: 2019-10-25
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention aims to propose a method for manufacturing an electric core to solve the problem that the pole pieces in the electric core are prone to misalignment

Method used

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  • Manufacturing method of cell
  • Manufacturing method of cell

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Embodiment Construction

[0030] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0031] When using the existing manufacturing method to produce batteries, the electrode group will be hot-pressed and shaped, and the electrode group will be preheated for 15-30 minutes before hot pressing to increase the internal and external temperature of the electrode group to soften the organic adhesive polymer coating Particles are then hot-pressed under a high pressure of 2-3T, so that the separator and the pole piece are fully bonded, but because the organic binder polymer coating particles have been cured, even under hot-pressing conditions, they cannot achieve a high degree of bonding. Good bonding effect, there is still the occurrence of dislocation between the separator and the pole piece. In this case, the adhesion between the coating and the pole piece is weakened, and the coating force that inh...

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Abstract

The invention provides a manufacturing method of a cell. The manufacturing method of the cell comprises the steps of sequentially laminating a positive pole piece, an isolating film and a negative pole piece into a pole set; attaching an insulating layer to the outer surface of the pole set; connecting a plurality of pole sets into a pole set assembly; attaching binding pieces to the outer surfaceof the pole set assembly; and installing the pole set assembly in a shell of the cell. The cell produced according to the manufacturing method of the invention can prevent the pole pieces from beingseparated or being staggered, and can avoid the short circuit of the cell, thereby being capable of improving the use safety of the cell, and being also capable of improving the smoothness of the cell. In addition, the welding dust can be prevented from getting into the internal part of the pole set after attaching the insulating layer to the outer surface of the pole set.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a method for manufacturing a battery cell. Background technique [0002] In the related technology, after the positive pole piece, the negative pole piece and the separator are laminated into the pole group, a binding piece is pasted on the outer surface of the pole group, and the pole piece cannot be avoided during the heat-pressing shaping process of the pole group, and the heat-pressing effect is not good. For a good pole group, the pole pieces are easy to be mis-layered, resulting in a short circuit of the battery cell. Moreover, after the binding piece is pasted on the outer surface of the pole group, the tightening point of the binding piece is subjected to a large force, resulting in uneven force on the entire pole group. After the pole group is hot-pressed and shaped, the diaphragm of the binding piece attachment will be wrinkled. At the same time, after the existing bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M6/00H01M2/34
CPCH01M6/005H01M10/0404H01M50/572Y02P70/50
Inventor 王学飞孙晓辉杨树涛
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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