Manufacturing method of winding type battery cell, winding type battery cell and lithium battery

A production method and winding technology, which are applied in the directions of non-aqueous electrolyte batteries, electrodes of primary batteries, electrodes of non-aqueous electrolyte batteries, etc., can solve the problems of metal chips and hidden dangers of battery operation, and achieve the effect of avoiding hidden dangers.

Inactive Publication Date: 2020-12-22
HUBEI JINQUAN NEW MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal chips will be generated during cutting, and the metal chips left in the battery will pose a safety hazard to the operation of the battery

Method used

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  • Manufacturing method of winding type battery cell, winding type battery cell and lithium battery
  • Manufacturing method of winding type battery cell, winding type battery cell and lithium battery
  • Manufacturing method of winding type battery cell, winding type battery cell and lithium battery

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Embodiment Construction

[0030] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0031] Such as Figure 1 to Figure 6 As shown, the manufacturing method of a winding battery provided by the present invention provides a positive electrode sheet 11, a negative electrode sheet 12 and a separator 13, and one side of the positive electrode sheet 11 is extended to form a positive electrode empty foil area 110, and a positive electrode empty foil area 110 Along the first direction, there are a plurality of positive electrode empty foil area segments, one side of the negative electrode sheet 12 is extended to form a negative electrode empty foil area, and the negative electrode empty foil area has a plurality of negative electrode empty foil...

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Abstract

The invention relates to a manufacturing method of a wound battery cell, the wound battery cell and a lithium battery. The method comprises the steps: providing a positive plate, a negative plate anda diaphragm, and enabling one side of the positive plate and one side of the negative plate to extend to form a positive empty foil area and a negative empty foil area, wherein the positive empty foilarea and the negative empty foil area are provided with a plurality of positive empty foil area sections and negative empty foil area sections in the first direction; enabling the lengths of the anode empty foil region sections and the cathode empty foil region sections to be different; stacking and winding the positive plate, the diaphragm and the negative plate according to a set sequence to form a battery cell, wherein the positive empty foil area and the negative empty foil area are respectively positioned at two ends of the battery cell; respectively shaping the positive empty foil areaand the negative empty foil area to enable the positive empty foil area sections and the negative empty foil area sections to be respectively stacked together, enabling the ends, far away from the centers of the positive pole piece and the negative pole piece, of the positive empty foil area sections and the negative empty foil area sections to be flush, and respectively welding all the positive empty foil area sections and the negative empty foil area sections to form positive tabs and negative tabs. The method has the characteristics of simplifying the process flow and improving the batteryproduction quality.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a manufacturing method of a wound battery cell, a wound battery cell made by the manufacturing method, and a lithium battery including the wound battery cell. Background technique [0002] In the current production of lithium batteries, especially the production of tabs for wound batteries, foils are usually drawn from the pole pieces, and multiple foils are shaped together and welded to form tabs after winding. Since the battery core formed after winding has a certain thickness, the ends of the foils are stepped after being shaped together. After the welding is completed, the ends of the lugs need to be trimmed to make them flat. However, metal chips will be generated during cutting, and the metal chips left in the battery will pose a safety hazard to the operation of the battery. Contents of the invention [0003] The object of the present invention is to provide a manufa...

Claims

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Application Information

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IPC IPC(8): H01M10/0587H01M4/13H01M4/06H01M6/14
CPCH01M4/06H01M4/13H01M6/14H01M10/0587Y02E60/10Y02P70/50
Inventor 陈利权高灿李倩伟何巍
Owner HUBEI JINQUAN NEW MATERIALS CO LTD
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