Battery pole piece rolling device and method

A battery pole piece and roll pressing technology, which is applied in battery electrodes, electrode rolling/calendering, electrode manufacturing, etc., can solve problems such as broken tape and foil wrinkling, so as to solve the problem of wrinkling and broken tape and improve production efficiency , The effect of reducing the cost of reworked materials

Inactive Publication Date: 2020-01-10
东莞汇洋动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the objectives of the present invention is to provide a battery pole sheet rolling device, which can solve the problems of wrinkling and broken tapes when the zebra-coated foil is rolled

Method used

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  • Battery pole piece rolling device and method
  • Battery pole piece rolling device and method
  • Battery pole piece rolling device and method

Examples

Experimental program
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Embodiment 1

[0029] like Figure 1~2 As shown, this embodiment provides a battery pole piece rolling device, which includes an unwinding assembly 1, a cutting assembly 2, a rolling assembly 3, a rolling assembly 4 and a winding assembly 5, which are sequentially connected by transmission. Comprising a slitting knife shaft and several slitting knives arranged on the slitting knife shaft, the rolling assembly 3 includes an upper pressing roller 31 and a lower pressing roller 32 arranged below the upper pressing roller 31 .

[0030] In an embodiment of the battery pole sheet rolling device according to the present invention, the unwinding assembly 1 includes an unwinding roller and an unwinding regulating roller arranged in sequence. The unwinding adjustment roller can swing left and right relative to the center line, and its position can be adjusted to ensure the accurate unwinding position of the coated pole piece.

[0031] In one embodiment of the battery pole piece rolling device accordi...

Embodiment 2

[0036] like image 3 As shown, the present embodiment provides a rolling method, comprising the following steps:

[0037] Step 1: Apply the slurry on the surface of the foil by zebra coating and dry to obtain a single sheet of foil 6 with several dressing areas 61;

[0038] Step 2, cutting the individual foil material 6 to obtain several individual foil materials 7;

[0039] Step 3, rolling the single foil 7 to obtain the rolled single foil 7;

[0040] Step 4, winding up the single strip of foil material 7 after rolling, and the rolling is completed.

[0041] In an embodiment of the rolling method according to the present invention, in step one, empty foil areas 62 are connected to both sides of the dressing area 61 .

[0042] In an embodiment of the rolling method according to the present invention, in step 2, cutting the single foil 6 is specifically cutting along the empty foil region 62 between any two dressing regions 61 .

[0043] In an embodiment of the rolling meth...

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PUM

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Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a battery pole piece rolling device. The battery pole piece rolling device comprises an unwinding assembly, a slitting assembly, a rolling assembly, a roller passing assembly and a winding assembly which are in transmission connection in sequence. The slitting assembly comprises a slitting cutter shaft and a plurality of slitting cutters arranged on the slitting cutter shaft. The rolling assembly comprises an upper pressing roller and a lower pressing roller arranged below the upper pressing roller. The invention also relates to a battery pole piece rolling method, which comprises the following steps: coating the surface of a foil with slurry in a zebra coating manner and drying the foil to obtain a single foil with a plurality of dressing areas; slitting the single foil to obtain a plurality of single foil strips; rolling the single foil strips to obtain rolled single foil strips; and winding the rolled single foil strips to complete rolling. According to the rolling method provided by the invention, a pole piece releases stress before rolling, so that the problems of wrinkling and strip breakage of the foil after zebra coating are solved, the production efficiency is improved, and the rework material cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a battery pole piece rolling device and method. Background technique [0002] Lithium-ion batteries are one of the energy sources of new energy vehicles. The performance requirements of new energy vehicles for lithium-ion batteries are very different from those of consumer batteries. Power batteries are generally used in new energy vehicles. Existing power batteries are usually The lithium-ion battery with multi-tab and all-tab structure not only has the performance characteristics of laminated sheets, but also has the advantages of high-efficiency winding. [0003] The production process of traditional lithium-ion battery pole pieces generally goes through processes such as coating, rolling, and slitting. In the production process of power batteries, in order to improve production efficiency, Zebra coating will be used in the coating process. Zebra co...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/139
CPCH01M4/0404H01M4/0409H01M4/0435H01M4/139Y02E60/10
Inventor 肖凯王易玮许瑞胡坤
Owner 东莞汇洋动力科技有限公司
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