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Positive tab connection structure of battery and welding method

A battery positive electrode and tab technology, applied in structural parts, welding equipment, laser welding equipment, etc., can solve the problems of ineffective control of product quality, poor reliability of aluminum tab transfer, inconvenient transfer operation, etc. It is not easy to achieve Unstable welding, good transfer reliability, and convenient transfer operation

Active Publication Date: 2016-01-20
ZHEJIANG CHAOWEI CHUANGYUAN INDUSTRAIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes that the positive tab of the existing soft-packed lithium battery is an aluminum tab, and it is difficult to connect and assemble the aluminum tab with the tin pad and the nickel pad during the assembly process. Welding and resistance welding are prone to unstable welding, false welding, and false welding. The quality of the product cannot be effectively controlled, and the reliability of the transfer of the aluminum tab is poor, and the transfer operation is inconvenient. A battery positive electrode is provided. Ear transfer structure and welding method, the positive tab of the soft-packed lithium battery is easy to connect and assemble with the tin pad and nickel pad during the assembly process, and the tab uses tin welding and resistance welding during the assembly process, which is not easy to cause welding instability, False welding, virtual welding and other bad phenomena, the product quality can be effectively controlled, the reliability of the aluminum tab transfer is good, and the transfer operation is convenient

Method used

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  • Positive tab connection structure of battery and welding method
  • Positive tab connection structure of battery and welding method
  • Positive tab connection structure of battery and welding method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1: A battery positive tab transfer structure (see attached figure 1 , attached figure 2 ), including the battery body 1, the battery body is provided with a positive pole lug 2, a negative pole lug 3, the positive pole lug is an aluminum lug, a nickel current carrier 4 is welded on the positive pole lug, the nickel current carrier and the positive pole A metal conductive clip 5 is detachably connected between the ears. The nickel current carrier has a Z-shaped stepped structure. The nickel current carrier includes an output terminal part 6, a transition part 7, and a welding part 8. A positioning groove 9 is arranged on the upper surface of the welding part, and the positive pole lug is inserted into the positioning groove. The end of the tab of the positive electrode abuts on the transition part. An elastic clip 10 is provided at the connection position between the output terminal part and the transition part, and the positive electrode tab is arranged betwe...

Embodiment 2

[0028] Example 2: A battery positive tab transfer structure (see attached image 3 ), its structure is similar to Embodiment 1, the main difference is that in this embodiment, both sides of the positioning groove on the upper surface of the welding part are provided with inwardly turned flanges 11, and the opening width between the upper ends of the two flanges is smaller than that of the positive electrode. The width of the lug, the two sides of the positive pole lug are clamped between the flange and the welding part. Elastic stamping heads 12 punched inward are provided on both flanges, and clamping grooves 13 are provided on both sides of the positive electrode lug, and the elastic stamping heads are snapped into the clamping grooves. Other structures are the same as in Embodiment 1. The nickel current carrier is clamped on the positive pole lug by flanging to realize reliable connection between the nickel current carrier and the positive pole lug, and the insertion and p...

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Abstract

The invention discloses a positive tab connection structure of a battery and a welding method, and aims at solving the problems that bad phenomena of welding instability, cold soldering, faulty soldering and the like are easily generated when tin soldering and electric resistance welding are utilized by an aluminum tab in an assembly process, the product quality cannot be effectively controlled, the aluminum tab is poor in connection reliability and a connection operation is inconvenient due to the fact that the positive tab of an existing soft package lithium battery is the aluminum tab and the aluminum tab is not easily connected and assembled with a tin bonding pad and a nickel bonding pad in the assembly process. The positive tab connection structure of the battery comprises a battery body, wherein the battery body is provided with the positive tab and the negative tab; a nickel current-carrying plate is welded on the positive tab; and a metal conductive clamp is detachably connected between the nickel current-carrying plate and the positive tab.

Description

technical field [0001] The invention relates to a lithium-ion battery, more specifically, it relates to a battery positive tab transfer structure and a welding method with reliable connection. Background technique [0002] Lithium-ion power batteries are widely used in various fields due to their excellent functions and characteristics. The soft-pack-shaped lithium-ion battery is composed of single cells and assembled into a large-capacity battery pack, which is gradually used in electric bicycles, electric vehicles, UPS and other fields. The pouch battery is assembled into a battery pack with a rectangular structure by connecting a single cell in series or in parallel; the positive output tab of each single cell in the battery pack is an aluminum current-carrying sheet, and the protective plate pad of the battery Generally, it is a tin pad or a nickel pad, and the melting point of aluminum is much lower than that of nickel, so that it is difficult to connect and assemble t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M2/30B23K26/21H01M50/531H01M50/543
CPCB23K26/20H01M50/531H01M50/543Y02E60/10
Inventor 李爱明任宁孙延先冯凯佘一红
Owner ZHEJIANG CHAOWEI CHUANGYUAN INDUSTRAIAL
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