Manufacturing method for electrode sheet cutting, electrode sheet using the same, and secondary battery using the same

A manufacturing method and pole piece technology, applied in secondary batteries, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve problems such as battery performance impact, improve performance and life, and prevent puncture or puncture.

Inactive Publication Date: 2012-04-25
SUZHOU GOLDEN CROWN NEW ENERGY +1
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Problems solved by technology

However, the position of the lower knife during cutting is also the position where the knife is retracted, which is likely to cause tearing marks such as burrs. Although the probability of this phenomenon can be

Method used

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  • Manufacturing method for electrode sheet cutting, electrode sheet using the same, and secondary battery using the same
  • Manufacturing method for electrode sheet cutting, electrode sheet using the same, and secondary battery using the same
  • Manufacturing method for electrode sheet cutting, electrode sheet using the same, and secondary battery using the same

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[0026] The present invention will be described in detail below in conjunction with various embodiments shown in the drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to these embodiments are included in the protection scope of the present invention.

[0027] like figure 1 As shown in , the prior art pole piece cutting method is as follows: the pole piece substrate 1 "is cut, and the pole piece substrate 1 " includes a material coating area 12 ". During cutting, at least one cutter is used to start from one Start cutting at the starting position 3" of the side 2" of the material coating area 12" of the pole piece, and cut along the cutting line 4" to the start of the side 2" of the material coating area 12" of the other pole piece Position 3", cut the starting position 3" of the next pole piece material coating area 12" side 2" in turn, so, after cutting a plural...

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Abstract

The present invention provides a manufacturing method for electrode sheet cutting, an electrode sheet using the manufacturing method, and a secondary battery using the manufacturing method. The manufacturing method comprises the following steps that: (1) one end of an electrode sheet substrate is provided with an electrode lug reservation position for cutting to form a plurality of electrode lugs, the other end of the electrode sheet substrate is provided with a material coating area, the electrode lug reservation position is provided with a starting position, a cutting tool is adopted to carry out cutting from the starting position; (2) the cutting tool cuts along the cutting line, and finally returns to the starting position to form the electrode sheet with the electrode lugs; (3) the cut electrode sheet is separated. The method of present invention has the following advantages that: the cutting treatment is started from the electrode lug reservation position, such that the burr generating or the tearing mark generating on the edge of the material coating area is avoided so as to prevent the isolation membrane from perforation or puncture, therefore, the use performance and the service life of the battery are enhanced.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a manufacturing method for pole piece cutting and pole pieces and secondary batteries using the manufacturing method. Background technique [0002] Secondary batteries, especially the pole pieces of lithium-ion batteries, are generally made by mixing electrochemically active substances, conductive agents, adhesives, diluents and other materials into a slurry, and then ink-jet, extrusion, printing transfer, etc. Coating the slurry on the electrode substrate material (such as aluminum foil, copper foil), after the baking step to solidify the coated slurry, and then through the rolling step to compact the coated slurry material, and finally the electrode The sheet is cut according to the size of the electrode sheet required for making the battery. [0003] Lithium-ion batteries with a laminated structure are stacked in the form of positive pole pieces, separators, and negative pole pieces....

Claims

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Application Information

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IPC IPC(8): H01M4/139H01M4/13H01M10/0525B21D28/02
CPCY02E60/122Y02E60/10
Inventor 黄仁治曾裕
Owner SUZHOU GOLDEN CROWN NEW ENERGY
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