Secondary battery and manufacturing method therefor

A technology for secondary batteries and battery casings, which is applied in secondary battery manufacturing, secondary batteries, lithium batteries, etc., can solve the problems of high battery assembly costs and high battery manufacturing costs, achieve compactness inside the battery casing, and reduce internal resistance. , the effect of shortening the current path

Inactive Publication Date: 2011-09-21
HITACHI VEHICLE ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem of (6) resulting in high battery assembly cost and thus high battery manufacturing cost

Method used

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  • Secondary battery and manufacturing method therefor
  • Secondary battery and manufacturing method therefor
  • Secondary battery and manufacturing method therefor

Examples

Experimental program
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Embodiment Construction

[0031] Hereinafter, an embodiment of a lithium ion secondary battery to which the present invention is applied will be described with reference to the drawings.

[0032] Such as figure 1 As shown in (A), the lithium ion secondary battery 30 according to the embodiment of the present invention includes a battery case 1 having an opening portion open on the entire surface; and a battery cover 3 that seals the opening portion of the battery case 1. In the space defined by the battery case 1 and the battery cover 3, the power generating element group formed by winding the positive and negative plates is arranged so as to be immersed in the electrolyte.

[0033] Regarding the battery case 1, the length of the other side orthogonal to the two sides is formed to be shorter than the length of any one of the four sides constituting the outer periphery of the opening. That is, the battery case 1 is formed in a shallow, bottomed rectangular parallelepiped shape in which the length of one side...

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PUM

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Abstract

Disclosed is a lithium ion secondary battery provided with a battery can (1) and a battery lid (3) for sealing an opening of the battery can (1). A power generating element group (6) comprising wound positive and negative electrode plates is arranged in a space defined by the battery can (1) and the battery lid (3). The battery can (1) is formed into a rectangular parallelepiped shape with a bottom having a shallow form in which the length of one of the two perpendicular sides of the four sides forming the outer periphery of the opening is shorter than the other side. In the power generating element group (6), uncoated members (6A, 6B) of an active material mixture of the positive and negative electrode plates are exposed on mutually opposite sides. The power generating element group (6) is arranged so that the uncoated members (6A, 6B) are positioned directly above a through-hole (1B). Connecting members (9A, 9B) are connected to the uncoated members (6A, 6B) and conduct electricity to outside of the battery through the through-hole (1B).

Description

Technical field [0001] The present invention relates to a secondary battery and a method of manufacturing the same, and in particular to a secondary battery having a structure including a rectangular parallelepiped-shaped battery case with an opening formed therein, and a battery sealing the opening of the battery case The cover and the power generating element group including positive and negative plates are arranged in the space delimited by the battery case and the battery cover. Background technique [0002] Affected by the social trend of protecting the global environment, the practical and popularization of secondary batteries for driving vehicles such as hybrid vehicles and electric vehicles has become a top priority, and its research and development projects have been widely launched. As the structure of the secondary battery for driving vehicles, the following structure is known: the thin plates (positive and negative plates) of both the positive and negative electrodes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/26H01M10/04H01M2/06H01M2/12H01M2/04H01M50/103H01M50/531
CPCH01M4/70Y02E60/122H01M2/0207H01M2/0217Y02T10/7011H01M2/26H01M10/052H01M10/0587Y10T29/49108Y02E60/10H01M50/103H01M50/531Y02P70/50Y02T10/70
Inventor 河野竜治佐藤丰纲木拓郎平野不二夫小关满
Owner HITACHI VEHICLE ENERGY
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