Preparation method of battery pole piece

A battery pole piece, pole piece technology, applied in electrode manufacturing, battery electrodes, circuits, etc., can solve the problem of large pole piece impedance, and achieve the effect of low impedance, effective use, and fast efficiency

Pending Publication Date: 2021-04-16
HIGHPOWER TECH HUIZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a battery pole piece preparation method for the problem of high impedance of the pole piece prepared by the existing pole piece preparation process

Method used

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  • Preparation method of battery pole piece
  • Preparation method of battery pole piece
  • Preparation method of battery pole piece

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Embodiment Construction

[0043] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0044] The battery pole piece preparation method provided by the embodiment of the present invention includes the following steps:

[0045] S10: Presetting a first tab position on the first surface of the current collector 1 .

[0046] S20: if image 3 As shown, the first pressure relief layer 2 is pasted on the first tab position, wherein, when a certain pressure is applied to the first pressure relief layer 2, the first pressure relief layer 2 can be removed from the current collector 1 fall off.

[0047] S30: if Figure 3-4 As shown, the active material layer 3 is...

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Abstract

The invention relates to a preparation method of a battery pole piece. The preparation method comprises the steps of presetting a first tab position on a first surface of a current collector; pasting a first pressure removing layer on the first tab position; coating an active material layer on the first surface of the current collector and the first pressure removing layer; and applying pressure to the first pressure removing layer coated with the active material layer to enable the first pressure removing layer to fall off from the current collector, thereby forming a first hollowed-out area which is used for welding the tab and is not covered by the active material layer on the first surface of the current collector. According to the preparation method of the battery pole piece, the tab can be positioned in the middle of the active material layer or close to the middle of the active material layer, the prepared pole piece is higher in energy density and smaller in impedance, the requirements of quick charging and quick discharging can be met, the pole piece is not easy to heat during charging, the danger coefficient is reduced, the preparation process is simple, and the method is easy to operate, low in cost, suitable for rapid production and capable of effectively utilizing the current collector.

Description

technical field [0001] The invention belongs to the technical field of batteries, in particular to a method for preparing battery pole pieces. Background technique [0002] As lithium-ion batteries are widely used in electronic devices such as mobile phones and notebook computers, their market demand is increasing, and the performance requirements for lithium-ion batteries are also getting higher and higher. Therefore, high energy density, fast charge and fast discharge, The battery pole piece preparation process with low impedance and fast manufacturing speed is the biggest and most urgent demand in the current market. like figure 1 and figure 2 As shown, the traditional pole piece process is usually to coat a plurality of active material regions at intervals on the current collector 1, and the tabs 4 are welded at the intervals 1' of the active material regions (that is, by cutting it into pole pieces. The rear tab of the body is an empty foil area welded near the end ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/139
CPCY02E60/10
Inventor 吴如荣鲁海旭张仔伟于立娟周燕胡大林韩晓辉廖兴群
Owner HIGHPOWER TECH HUIZHOU
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