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Welding method of power battery and its sealing nail

A welding method and power battery technology, applied in welding equipment, laser welding equipment, metal processing equipment, etc., can solve problems such as inclusions or explosion points

Active Publication Date: 2019-05-10
HANS LASER TECH IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a welding method for a power battery and its sealing nails for the problems of inclusions or explosion points when the sealing nails are welded to the cover plate

Method used

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  • Welding method of power battery and its sealing nail
  • Welding method of power battery and its sealing nail
  • Welding method of power battery and its sealing nail

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Embodiment Construction

[0036] In order to facilitate the understanding of the present invention, a more comprehensive description will be given below of the power battery and its sealing nail welding method with reference to the relevant drawings. The preferred embodiment of the welding method of the power battery and its sealing nail is given in the accompanying drawings. However, the welding method of the power battery and its sealing nails can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the power battery and its sealing nail welding method more thorough and comprehensive.

[0037] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to ...

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Abstract

The invention relates to a power battery and a welding method of a sealing nail of the power battery. The welding method of the sealing nail mentioned above is used for welding the sealing nail on a cover plate of the power battery. The welding method of the sealing nail comprises that impurities in a containing groove of the cover plate are cleaned through a first laser, and meanwhile, a first protective gas is blown to the action part of the first laser along a first preset angle between the plane where the first protective gas is located and the plane where the cover plate is located, wherein the focal point of the first laser is located in the containing groove, and the distance from the focal point of the first laser to the bottom of the containing groove is S1; the sealing nail is placed in the containing groove, so that an uneven annular gap exists between the sealing nail and the containing groove; the sealing nail is positioned and fixed in the containing groove in a spot welding mode through a second laser, and meanwhile, a second protective gas is blown to the action part of the second laser; and the sealing nail and the cover plate are welded through the second laser along the annular gap. According to the power battery and the welding method of the sealing nail of the power battery mentioned above, the problem that impurities or explosion points occur when the sealing nail is welded to the cover plate.

Description

technical field [0001] The invention relates to the technical field of automobile battery manufacturing, in particular to a welding method for a power battery and a sealing nail thereof. Background technique [0002] In response to the country's call for energy conservation and emission reduction, the new energy vehicle industry has developed rapidly, driving the development of power batteries for new energy vehicles. As the core component of new energy vehicles, power batteries play a decisive role in the performance of the vehicle. There are many parts that need to be welded during the manufacture of power batteries, including the welding of sealing nails. As the last process of power battery welding, the welding of sealing nails is very important. Once there are welding defects, the power battery will be scrapped. [0003] After the casing of the power battery is welded, the electrolyte is injected through the liquid injection port of the cover plate, and then the rubbe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/21B23K26/00B23K26/36
CPCB23K26/00B23K26/21B23K26/36
Inventor 朱宝华丁凯强李小婷王瑾高云峰
Owner HANS LASER TECH IND GRP CO LTD
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