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Battery and method of producing the same

A manufacturing method and battery technology, which can be applied to battery pack parts, final product manufacturing, battery case/housing, etc., which can solve the problems of gasket wall thickness becoming thinner and insufficient sealing performance, etc.

Inactive Publication Date: 2006-04-05
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, even in this case, since a molding surface having an arc is used for both the linear caulking portion 34 and the arcuate caulking portion 35, the linear caulking portion 34 having different caulking sealability cannot be sufficiently ensured. As for the sealing performance of the arc-shaped riveting part 35, as the capacity and thickness of the battery increase, the wall thickness of the battery case becomes thinner, and the wall thickness of the gasket also becomes thinner. This problem is becoming more and more serious.

Method used

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  • Battery and method of producing the same
  • Battery and method of producing the same

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Embodiment Construction

[0020] Referring to Figure 1A- Figure 4C The battery and its manufacturing method in one embodiment of the present invention will be described using a lithium-ion rechargeable battery. However, as long as the cross-sectional shape is oblong and flat, the present invention is not particularly limited, and is also applicable to nickel-cadmium batteries or nickel-hydrogen batteries. Batteries and other batteries.

[0021] In FIGS. 1A to 1B , 1 is a lithium-ion rechargeable battery, which has a flat cross-sectional shape of an elongated oval shape, a thickness dimension of t, and a width dimension W of about 4t to 8t. battery 1 as figure 2 , image 3 As shown, it is composed of a battery case 2 with a bottomed flat battery case 2 with an open upper end, in which an electrode plate group in which a positive electrode plate and a negative electrode plate are opposed to each other and a power generating element 3 composed of an electrolyte solution are housed. The material of 2 ...

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Abstract

A battery manufacturing method including a step of accommodating elements for electromotive force (3) in a battery case (2) having an oval cross section, a step of placing a sealing member (5) on an open end of the battery case (2) with a gasket interposed therebetween, and a step of sealing the battery by inwardly crimping the open end of the battery case (2). In the sealing step, long side edges (2a) of the battery case (2) are crimped by a forming surface (17) having a rounded cross section, and arc-shaped edges (2b) connecting both long side edges are crimped by a flat forming surface (18). A battery having excellent safety properties with no risk of liquid leakage due to its uniform, airtight, and highly reliable seal around the entire circumference of the open end of the battery case (2) is thus provided.

Description

technical field [0001] The present invention relates to a battery suitable for a battery power source of small portable electronic devices and the like and a method of manufacturing the same. Background technique [0002] In recent years, the performance of portable electronic devices such as mobile phones and portable information terminals largely depends not only on the mounted semiconductor elements and electronic circuits, but also on the performance of sealed rechargeable batteries that can be charged and discharged. It achieves light weight and compact structure while maintaining the capacity of the installed sealed rechargeable battery. As a sealed rechargeable battery that meets these requirements, a nickel-metal hydride storage battery with an energy density about twice that of a nickel-cadmium storage battery was developed, and a lithium-ion battery with higher performance was developed, and these batteries are used according to the application of the equipment use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M50/107H01M50/167H01M50/186
CPCY02E60/12H01M2/0207H01M2/08H01M2/0413Y10T29/4911Y02E60/10H01M50/171Y02P70/50H01M50/186H01M50/167H01M50/107
Inventor 井上广树鹤谷伸二
Owner PANASONIC CORP
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