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Battery

A technology for batteries and battery boxes, which is applied to battery pack parts, secondary battery manufacturing, airtight storage batteries, etc., to achieve excellent installability and suppress expansion

Inactive Publication Date: 2004-09-01
HITACHI MAXELL ENERGY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The present invention provides a battery with a new structure capable of simultaneously solving the above-mentioned problems in all aspects such as shape, mountability, strength, and productivity when the battery is thinned.

Method used

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Embodiment Construction

[0055] Figure 1 to Figure 6 This is an example showing the application of the present invention to a prismatic lithium ion secondary battery (hereinafter referred to as battery). Such as figure 1 and figure 2 As shown, the battery 1 has rounded corners, top view ( figure 2 state) is a rectangular battery box 2. Such as Figure 1 to Figure 4 As shown, the battery case 2 is composed of a case body 3 having a recess 31 and a metal cover 4 that seals the opening end of the recess 31 of the case body 3 .

[0056] The box body 3 is formed into a dish shape by shallow drawing a sheet metal (metal thin plate), and a flat flange portion 32 is formed on the periphery of the opening end over the entire circumference. The flange portion 32, at figure 2 In the shown state, the width (flange width) L1 of the flange portion (first flange portion) 32a of the first short side portion 3a on the upper end side of the box body 3 is shorter than that of the second flange portion on the l...

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Abstract

The present invention relates to a battery suitable for use as a power source of small electronic equipment such as portable electronic equipment, and in particular, to a configuration of a thin battery. A battery can (2) is composed of a can main body (3) formed with a recess (31) for receiving electrode bodies (5), and a metal cover (4) sealing the open end of the recess (31) in this can main body (3). The can main body (3) is dish-shaped by shallow-drawing a metal sheet. The peripheral edge of the open end of this can main body (3) is provided with a flange (32) capable of maintaining the interior of the recess (31) gas tight and liquid tight by being integrally joined to the metal cover (4). This makes it possible to provide a battery of novel construction that, in achieving the thinning the battery, is capable of solving the problems liable to occur in all aspects including shape, attachability, strength, and productivity, all at once.

Description

technical field [0001] The present invention relates to a battery suitable for use as a power source of small electronic equipment such as a portable electronic equipment, and particularly relates to a structure of a thin battery. Background technique [0002] There are, for example, cylindrical and square batteries used as power sources for electronic equipment and the like. Cylindrical batteries are processed into cylindrical metal boxes by deep drawing (deep drawing of cylindrical parts), and rectangular batteries are processed into rectangular metal boxes by deep drawing (deep drawing of square parts). [0003] On the other hand, relatively thin batteries are used in small portable electronic devices such as portable information terminals that require thinness, and such thin batteries include the following types. [0004] ① Use the aforementioned deep-drawn metal box (deep-drawn box), and then fit a metal cover in its opening and weld the structure (for example, refer t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/04H01M2/10H01M2/12H01M2/30H01M10/04H01M2/02H01M10/34H01M10/42
CPCY02E60/12H01M10/0436H01M10/425H01M2/0217H01M2/0426H01M2/1061H01M10/34Y02E60/10H01M50/103H01M50/169Y02P70/50
Inventor 杣友良树渡边修田中正智
Owner HITACHI MAXELL ENERGY LTD
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