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Method and device for sealing and welding battery case cover

A welding method and welding device technology, applied in the field of battery case cover sealing welding method and device, can solve problems such as poor welding quality, achieve significant control, ensure sealing welding quality, and reduce the effect of overall temperature rise

Active Publication Date: 2022-04-01
WUHAN YIFI LASER EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a battery case cover sealing welding method and device, which are used to solve the problem of poor welding quality in the current sealing welding of lithium-ion batteries

Method used

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  • Method and device for sealing and welding battery case cover
  • Method and device for sealing and welding battery case cover
  • Method and device for sealing and welding battery case cover

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Embodiment Construction

[0027] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] Combine below Figure 1-Figure 4 A sealing welding method and device for a battery case cover of the present invention are described.

[0029] Such as figure 1 As shown, this embodiment provides a battery case cover sealing welding method, and the executing body of the method may be a server or a control module of a battery case cover sealing welding device.

[0030] The method incl...

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Abstract

The invention provides a battery case cover sealing welding method and device, the method comprising: obtaining the geometric parameters of the lithium ion battery and the welding parameters of the laser welding device; The battery performs a cover operation and a rotation operation in sequence; according to the welding parameters, the laser head of the laser welding device is controlled to extend to the weld between the lithium-ion battery casing and the shell cover, and the output of the laser head is controlled. A single wavelength oscillating laser is used to laser weld the seam. The present invention can better control the shape of the metallographic molten pool of the weld when performing battery cover sealing welding. On the basis of ensuring the effective penetration depth and fusion width required by the process, the control of the heat-affected zone of the weld, the external The welding spatter and the control of the internal pores of the welding parts have achieved remarkable results, reducing the overall temperature rise during welding, thereby ensuring the sealing welding quality of lithium-ion batteries.

Description

technical field [0001] The invention relates to the technical field of battery processing, in particular to a method and device for sealing and welding battery case covers. Background technique [0002] In recent years, with the country's policy support for new energy, the lithium-ion battery industry has developed rapidly. In the production process of lithium-ion batteries, the current collecting plate must be welded to both ends of the battery cell first, then the shell cover and the shell are combined together, and finally the shell and the shell cover are sealed and welded. [0003] At present, the sealing welding method for the battery case cover is to perform sealing laser welding on the welding seam between the case cover and the casing while driving the lithium-ion battery to rotate after clamping and positioning the lithium-ion battery. However, the existing laser welding method is usually a fixed-focus welding mode, the welding power density is high, the maximum p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/28B23K26/08B23K26/14B23K26/142B23K26/70B23K37/04
CPCB23K26/28B23K26/0823B23K26/0876B23K26/702B23K26/142B23K26/14B23K37/0426B23K2101/36
Inventor 吴轩冉昌林雷波张辉
Owner WUHAN YIFI LASER EQUIP CO LTD
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