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Lithium battery cell active pre-rolling method and apparatus

A lithium battery, active technology, applied in secondary batteries, non-aqueous electrolyte batteries, circuits, etc., can solve problems such as poor cell performance, low cell quality rate, cell deformation, etc., to improve market competitiveness, The effect of improving the good rate and eliminating tension

Pending Publication Date: 2018-02-23
深圳市万德自动化科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies of the prior art, the present invention provides a method and device for active pre-rolling of lithium battery cells, which solves the problems of easy deformation of the existing cells during the pre-rolling process, low quality rate of cells, and poor performance of cells and other technical defects

Method used

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  • Lithium battery cell active pre-rolling method and apparatus
  • Lithium battery cell active pre-rolling method and apparatus
  • Lithium battery cell active pre-rolling method and apparatus

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Embodiment 1

[0043] Embodiment 1: In this embodiment, the data collected in step 1 is the rotation angular velocity of the negative electrode sheet feeding driving roller 213 and the positive electrode sheet feeding driving roller 313, and then establish the relationship between angular velocity and time, and further pass in step 3 The negative electrode sheet feeding drive motor 211 and the positive electrode sheet feeding drive motor 311 provide driving force to the negative electrode sheet feeding drive roller 213 and the positive electrode sheet feeding drive 313 respectively, and the negative electrode sheet feeding driving roller 213 and the positive electrode sheet feeding drive The drive 313 actively rotates according to the associated angular velocity, so that the rotational angular velocity of the negative electrode sheet feeding drive roller 213 and the positive electrode sheet feeding drive 313 are consistent with the collected data, thereby avoiding the deformation of the lower ...

Embodiment 2

[0044] Embodiment 2: In this embodiment, the data collected in step 1 is the tension of the upper diaphragm 41 and the lower diaphragm 42, and then the relationship between the tension and time is established, and further in step 3, the motor is driven by feeding through the negative electrode sheet 211 and the positive electrode sheet feeding drive motor 311 provide driving force to the negative electrode sheet feeding drive roller 213 and the positive electrode sheet feeding drive 313 respectively, and the negative electrode sheet feeding driving roller 213 and the positive electrode sheet feeding drive 313 are based on the associated tension. Actively provide an active torque that can offset the tension, thereby avoiding the deformation of the lower diaphragm 41 and the upper diaphragm 42, and helping to improve the quality of pre-rolling and the production quality of the battery cell.

[0045] Based on the above-mentioned active pre-rolling method for lithium battery cells,...

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Abstract

The invention discloses a lithium battery cell active pre-rolling method and apparatus. The method comprises the following steps: step one, collecting data, wherein the data comprises rotation angularvelocities of a negative pole feeding driving roller and a positive pole feeding driving roller during the pole piece pre-rolling process, or tension forces on a lower diaphragm and an upper diaphragm during the pole piece pre-rolling process; step two, establishing data association, and associating the data collected in the step one with the pre-rolling process; step three, according to the dataassociation established in the step two, driving the negative pole feeding driving roller and the positive pole feeding driving roller to rotate by a negative pole piece feeding driving roller and apositive pole piece feeding driving roller, and driving a negative pole piece and a positive pole piece to carry out pre-rolling. The apparatus comprises a middle pre-rolling module, a left pre-rolling module, and a right pre-rolling module. The provided method and apparatus has the advantages that the pre-rolling quality is good, the cell deformation in pre-rolling is avoided, and the cell quality is improved.

Description

technical field [0001] The invention relates to a technical solution in the field of lithium battery processing, in particular to a method and device for actively prerolling lithium battery cells. Background technique [0002] The current consumer lithium battery is developing towards thinner, smaller and shaped. Under the condition of ensuring the battery capacity, the bare battery cell should be made as thin or small as possible; [0003] At the same time, with the development of lithium battery fast-charging technology, a type of battery cell with wider width and lower height has been widely used. Because of the particularity of its winding, this type of battery cell is deformed in the inner pre-rolled part, resulting in the entire The degree of deformation of the pouch cell is intensified, which seriously affects its electrical performance and efficiency. [0004] During pre-rolling, it is necessary to press the pole piece and the diaphragm together, and the pole piece ...

Claims

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Application Information

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IPC IPC(8): H01M10/0587H01M6/14
CPCH01M6/14H01M10/0587Y02E60/10Y02P70/50
Inventor 孙振东王从凤冯纬宇周素兰
Owner 深圳市万德自动化科技有限公司
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