Laser welding effect testing method and fixture for lithium ion battery

A technology of lithium-ion batteries and test fixtures, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., which can solve the error of test results and cannot accurately evaluate the positive ear 2' and the cap 1' Laser welding effect and other issues to achieve the effect of preventing secondary damage and improving accuracy

Pending Publication Date: 2019-11-08
EVE ENERGY CO LTD
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the cylindrical battery is formed, the positive tab 2' is not welded vertically on the cap 1', and in the prior art, the tensile testing machine stretches the positive tab 2' in a direction

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Laser welding effect testing method and fixture for lithium ion battery
  • Laser welding effect testing method and fixture for lithium ion battery
  • Laser welding effect testing method and fixture for lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only the present invention. Some examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Angleaaaaaaaaaa
Login to view more

Abstract

The invention discloses a laser welding effect testing method and testing fixture for a lithium ion battery. According to the testing method, a tensile testing machine, the testing fixture and the to-be-tested battery are provided. The battery comprises a positive electrode tab and a cover cap connected with the positive electrode tab; the positive electrode tab comprises a first positive electrode tab segment and a second positive electrode tab segment, wherein the first positive electrode tab segment is welded to the cover cap through a laser, the second positive electrode tab segment and the first positive electrode tab segment are disposed at an included angle, and the first positive electrode tab segment and the cover cap are disposed at an acute angle. The method includes the following steps that S10, the position of the first positive electrode tab segment is maintained unchanged with respect to the cover cap, and the second positive electrode tab segment is pressed to be straight in the direction of the first positive electrode tab segment, so that the first positive electrode tab segment and the second positive electrode tab segment are located on the same straight line; S20, the cover cap is placed on the testing fixture, and the tensile testing machine is used for stretching the second positive electrode tab segment in the length direction of the first positive electrode tab segment. The testing method can be used for more realistically evaluating the welding effect between the positive electrode tab and the cover cap.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for testing the laser welding effect of a lithium-ion battery and a test fixture thereof. Background technique [0002] The laser welding capping process is a key process in the manufacturing process of cylindrical lithium-ion batteries, such as figure 1 As shown, after the positive electrode ear 2' is welded to the cap 1', it is necessary to bend part of the positive electrode ear 2' relative to the cap 1' to a certain extent (that is, the positive electrode ear 2' is not welded vertically on the cap 1'), and then Buckle the cap 1' on the mouth of the steel case. The welding effect of laser welding is generally detected by a tensile testing machine to quantify and judge the welding effect of laser welding. [0003] The general laser welding effect test method is to remove the cap 1' together with the positive tab 2' from the battery and then use a tensile testing ma...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N3/08G01N3/04
CPCG01N3/08G01N3/04G01N2203/0017G01N2203/0296G01N2203/0423
Inventor 田松姚繁章勇杨俊刘金成
Owner EVE ENERGY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap