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Battery module laser welding quality evaluation method and device

A technology of laser welding quality and battery module, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of automatic evaluation, no battery module laser welding quality, etc., and achieve the effect of accurate evaluation

Inactive Publication Date: 2019-01-11
CH AUTO TECH CORP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] At present, there is no automatic evaluation scheme for the quality of laser welding of battery modules

Method used

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  • Battery module laser welding quality evaluation method and device
  • Battery module laser welding quality evaluation method and device
  • Battery module laser welding quality evaluation method and device

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Experimental program
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Effect test

Embodiment Construction

[0048] In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific implementation of the invention will now be described with reference to the accompanying drawings.

[0049] image 3 It is a flowchart of a battery module laser welding quality assessment method provided by an embodiment of the present invention, and its specific steps are as follows:

[0050] Step 301: In the process of laser welding the battery module, use the voltage transformer and the current sensor to sample the electrical signals generated by the welding seam laser on the positive and negative tabs during the welding process, and obtain the electrical signals for the positive and negative electrodes respectively Multiple sets of sampled voltage and current values ​​of the welding seam laser on the ear.

[0051] Step 302: According to each set of sampled voltage and current values ​​of the welding seam laser on the positive and negative tabs, re...

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Abstract

The invention provides a battery module laser welding quality evaluation method and device. The battery module laser welding quality evaluation method comprises the steps that during the laser weldingof a battery module, electrical signals generated by welding seam laser on the positive and negative electrode tabs in the welding process are sampled, a plurality of groups of sampling voltage and current values separately aiming at the welding seam laser on the positive and negative electrode tabs are obtained, and actual output power of the corresponding welding seam laser on the positive andnegative electrode tabs is separately calculated; it is determined whether the situations that each actual output power of the welding seam laser on the positive electrode tab is located in a preset qualified output power range of the welding seam laser on the positive electrode tab, and each actual output power of the welding seam laser on the negative electrode tab is located in a preset qualified output power range of the welding seam laser on the negative electrode tab are satisfied or not, if the situations are satisfied, the welding quality is determined to be qualified; and if not, thewelding quality is determined to be unqualified. The battery module laser welding quality evaluation method and device realize the evaluation of the battery module laser welding quality.

Description

technical field [0001] The invention relates to the technical field of battery module welding, in particular to a method and device for evaluating the quality of battery module laser welding. Background technique [0002] Laser welding is a high-efficiency and precise welding method in which focused laser beams are used as energy to bombard weldments with heat generated by welding. Laser welding does not require a vacuum environment and can be carried out under a protective atmosphere or without a protective atmosphere, thus simplifying the process and reducing costs. [0003] Soft-pack lithium-ion batteries are composed of battery modules through different series and parallel methods. The welding joints of the battery tabs are two or more layers of laminated welding, and the laser penetrates and melts the laminated base materials to form a welded joint. [0004] figure 1 It is a structural schematic diagram of a battery module, wherein, 11 is a soft-packed lithium-ion pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/70
CPCB23K26/70B23K26/702B23K31/125
Inventor 王克坚曹瑜琦
Owner CH AUTO TECH CORP CO LTD
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