Welding method of sealed storage battery, sealed storage battery, and cap body

A welding method and battery technology, which can be applied to small-sized cells/battery packs, battery covers/end covers, welding equipment, etc., and can solve problems such as easy cracking

Active Publication Date: 2014-02-19
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, when intermittent welding is performed, laser radiation and non-radiation are repeated, at the end of welding, the part where the laser is applied is cooled rapidly, and thus there is a problem that cracks may easily occur

Method used

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  • Welding method of sealed storage battery, sealed storage battery, and cap body
  • Welding method of sealed storage battery, sealed storage battery, and cap body
  • Welding method of sealed storage battery, sealed storage battery, and cap body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] figure 1 is a perspective view showing the integration of the cover body 50 into the sealed secondary battery according to one embodiment. image 3 It is an explanatory diagram showing a terminal welding method for forming the cover body 50 . Figure 4 is an explanatory diagram showing the incident angle of the welding locus to the boundary line P and the crack length derived from the welding amplitude obtained from the experimental results.

[0018] The sealed type secondary battery is provided with a case having an opening portion on its upper portion and configured to enclose an electrolytic solution and a pair of electrodes therein; a cover body 50 configured to cover the case and a pair of terminals 60 and 61 connected to the pair of electrodes.

[0019] Such as figure 2 As shown, the cover body 50 is provided with a cover body 51 and terminals 60 , 61 made of an aluminum alloy material different from the material of the cover body 51 in terms of thermal diffus...

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Abstract

Provided is a welding method of a sealed storage battery, which is provided with a casing configured to encase therein electrodes and an electrolyte, a cap body configured to cover the casing, and two terminals inserted into holes provided in the cap body, connected to a pair of electrodes, and formed of a material including a composition different from a material of the lead. The welding method includes crushing and spreading the distal end side of each of two terminals along a cap body, and carrying out continuous welding along a boundary line between a circumference of the distal end side of the terminal, and the cap body, and alternately and repetitively by way of a position on the terminal side of the boundary line regarded as a reference line, and a position on the cap body side of the boundary line.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims priority from previous Japanese Patent Application No. 2012-179292 filed on Aug. 13, 2012, the entire contents of which are hereby incorporated by reference. technical field [0003] Embodiments of the present invention relate to a welding method of a sealed secondary battery having parts welded together of different kinds of metallic materials, and a sealed secondary battery and a cover formed using the welding method. Background technique [0004] A sealed type secondary battery is provided with a case configured to enclose electrodes and an electrolytic solution therein; a cover configured to cover the case; terminals and lead wires provided on the cover. [0005] After the terminals are inserted into holes provided in the cover, the terminals are pressed from the back side of the cover by means of a press. At this time, there is an insulator between the terminal and the cove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M2/04H01M2/30H01M50/15H01M50/159H01M50/176H01M50/55H01M50/553H01M50/562H01M50/566
CPCH01M10/04H01M2/30H01M2/0473H01M2/043H01M2/06H01M2/0486H01M2/0404B23K2103/08B23K26/28B23K26/32H01M50/553H01M50/15H01M50/55H01M50/176H01M50/566H01M50/562H01M50/159Y10T29/49108Y02E60/10Y02P70/50
Inventor 坂井哲男
Owner KK TOSHIBA
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