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Sealing cell

A technology for sealing batteries and sealing bodies, which is applied in the direction of batteries, secondary batteries, battery pack parts, etc., and can solve problems such as reduced welding strength and poor welding

Active Publication Date: 2010-04-21
MAXELL HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, similar to the above, welding defects such as gaps occur in the bead, and there is a problem that the welding strength decreases.

Method used

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Experimental program
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Embodiment Construction

[0030] Such as figure 1 and figure 2 As shown, the sealed battery of the present invention includes: a battery can 1 with a bottomed square tube shape with left and right horizontal openings on the top; electrode body 2 and non-aqueous electrolyte contained in the battery can 1; plugging the battery can 1 A cover 3 with a wide left and right width for sealing the upper opening of the cover 3; and a plastic insulator 5 arranged inside the cover 3 . The left and right width of the battery can 1 is 34 mm, the vertical height is 46 mm, and the front and rear thickness is 4 mm. A battery case 6 is formed by the battery can 1 and the cover 3 .

[0031] Such as figure 1 As shown, the electrode body 2 is produced by being wound in a spiral shape with a strip-shaped separator inserted between a strip-shaped positive electrode and a strip-shaped negative electrode. The electrode body 2 is in the winding state figure 2 The flat shape shown. The positive electrode is formed with...

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Abstract

The present invention relates to a sealed battery, which reduces jointing badness and can seal sealed body to battery case. After injecting electrolyte into battery case (6) through injecting hole (16), to seal the injecting hole (16) through plugging up the injecting hole (16) using sealed pin (17) and joint the sealed pin (17) around the injecting hole (16). The sealed body (17) is made from metal envelope material of aluminum layer (25) and nickel layer (26), the aluminum layer (25) sets on the side of the battery case (6), and the margin part (25a) of the aluminum layer (25)is more extruding towards the external lateral of the sealed body (17) than the one of the nickel layer (26), and is jointed on the border of the injecting hole (16) using laser.

Description

technical field [0001] The present invention relates to sealed batteries such as lithium ion batteries. Background technique [0002] Patent Documents 1 to 3 disclose a sealed battery in which an electrode body, an electrolytic solution, and the like are accommodated in a battery can, and the upper surface opening of the battery can is closed with a cover to form a battery case. In this sealed battery, the electrolyte solution is injected into the battery can through a liquid injection hole provided on the cover, and then the liquid injection hole is blocked with a sealing body composed of a sealing plug or a plate, and then the liquid is sealed with a laser or the like. The sealing body is welded to the upper surface of the cap which is the peripheral portion of the liquid injection hole, so that the liquid injection hole is sealed with the sealing body. [0003] The sealed battery can be used as a power source to be mounted on external equipment such as a mobile phone or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/02H01M2/04H01M2/08H01M2/36H01M10/40
CPCY02E60/12Y02E60/10Y02P70/50H01M2220/30H01M50/183H01M50/169H01M50/308H01M10/0525
Inventor 渡边修杣友良树
Owner MAXELL HLDG LTD
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