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Processing method for forming positive electrode end surface of circular lithium battery

A processing method and technology of lithium batteries, which are applied in battery assembly machines, secondary battery manufacturing, battery pack components, etc., can solve the problem that the top of the battery is not flat enough, and cannot meet the technical requirements of round lithium-ion batteries, etc. problem, to improve safety and solve the effect of leakage

Inactive Publication Date: 2019-12-27
力神电池(苏州)有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

figure 1 Among them, the battery forming jig includes a mold main body 1, and the inner side of the bottom of the mold main body 1 has a shell mouth edging pressure groove 2, and the surrounding edges of the shell mouth edging pressure groove 2 are arc transitions. , the top edge of the top shell of the battery finally obtained is not flat enough to meet the technological requirements of the aluminum wire ultrasonic welding method of the round lithium-ion battery

Method used

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  • Processing method for forming positive electrode end surface of circular lithium battery
  • Processing method for forming positive electrode end surface of circular lithium battery
  • Processing method for forming positive electrode end surface of circular lithium battery

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Embodiment Construction

[0044] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0045] see Figure 3 to Figure 14 , the invention provides a processing method for forming the positive end surface of a circular lithium battery, comprising the following steps:

[0046] The first step is to perform the first pre-forming of the battery case that needs to be edge-wrapped: for the round lithium battery case that needs to be edge-wrapped at the top shell mouth, the first-time forming fixture is used, driven by the external pressure mechanism Next, apply vertical downward pressure on the top shell opening of the round lithium battery case to obtain the round lithium battery case after the first molding of the top shell opening;

[0047] In the first step, for specific implementation, see Figure 4 , Figure 5As shown, the fi...

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Abstract

The invention discloses a processing method for forming a positive electrode end surface of a circular lithium battery. The method comprises the following steps that: step 1, for a circular lithium battery shell needing to be subjected to top shell opening edge covering processing, a first-time molding jig is adopted to vertically and downwards apply pressure to the top shell opening of the circular lithium battery shell under the driving of an external pressure mechanism, so that a circular lithium battery shell of which the top shell opening has been subjected to first-time molding is obtained; 2, for the circular lithium battery shell of which the top shell opening which has been subjected to the first-time molding, a second-time molding jig is adopted to vertically and downwards applypressure to the top shell opening of the circular lithium battery shell under the driving of the external pressure mechanism, so that a circular lithium battery shell of which the top shell opening has been subjected to second-time molding is obtained, and the top shell opening of the circular lithium battery shell is provided with a flat region. According to the processing method for forming thepositive electrode end surface of the circular lithium battery, the top shell opening of the circular lithium battery shell can be molded twice, so that the covered edge of the top shell opening of the shell is provided with the top flat region, and the requirement of an aluminum wire ultrasonic welding process can be met.

Description

technical field [0001] The invention relates to the technical field of battery manufacturing, in particular to a processing method for forming the positive end surface of a circular lithium battery. Background technique [0002] At present, lithium-ion batteries have the advantages of high specific energy, many cycle times, and long storage time. They are not only widely used in portable electronic devices such as mobile phones, digital cameras, and laptop computers, but also widely used in electric vehicles and electric bicycles. As well as large and medium-sized electric equipment such as electric tools, the performance requirements of lithium-ion batteries are getting higher and higher. [0003] For circular lithium-ion batteries, the current forming process of circular lithium-ion batteries is realized by compressing the steel case and battery cover through a pressure mechanism. First, the pressure mechanism applies pressure to the battery forming fixture to plastically ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/04H01M10/04H01M50/166
CPCH01M10/0404H01M50/166Y02E60/10Y02P70/50
Inventor 孙立亮薛雷顾翔朱勇邱青凤
Owner 力神电池(苏州)有限公司
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