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Electric storage device

Inactive Publication Date: 2012-07-26
GS YUASA INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]An object of the present invention is to provide an electric storage device having a structure that can reliably produce the sealing effect between a case and a sealing member.

Problems solved by technology

This results in reducing the degree of contact between the surface of the cover plate (metal plate 3) and the surface of the insulating sealing member (insulating member 4), and therefore impairing sealing performance in this region.
Furthermore, if the insulating sealing member (insulating member 4) is harder than the cover plate (metal plate 3), creep occurs in the insulating sealing member (insulating member 4), which also results in reducing the degree of contact between the surface of the cover plate (metal plate 3) and the surface of the insulating sealing member (insulating member 4), and therefore impairing sealing performance in this region.
This problem occurs not only in battery cells but also in capacitors (e.g., a double layer capacitor and the like) as well.

Method used

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Examples

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Embodiment Construction

[0067]A battery cell which is an embodiment of an electric storage device according to the present invention is described below with reference to the drawings. A battery cell according to the present embodiment is a non-aqueous electrolyte secondary battery cell and, more particularly, a lithium ion secondary battery cell. As shown in FIGS. 1 to 4, the battery cell according to the present embodiment includes a case 1 which is composed of a case body 2 and a cover plate 3 which covers an opening of the case body 2 to seal the case 1. The cover plate 3 includes terminal structures 9 which are electrically connected to an electrode assembly 4 housed in the case 1.

[0068]The case body 2 and cover plate 3 of the case 1 are metal members comprising an aluminum-based material such as aluminum and an aluminum alloy. The case body 2 is a rectangular box that is flat in the width direction so as to house a wound electrode assembly 4 that has been formed into an elliptic cylinder. The cover pl...

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Abstract

An electric storage device is provided having a structure that can reliably produce the sealing effect between a case and a sealing member. The electric storage device of the present invention includes an electrode assembly; a case that includes a defining wall and houses the electrode assembly; a sealing member that is arranged on the defining wall; and a conductive member that is electrically connected to the electrode assembly, the conductive member being supported by the sealing member, wherein at least a portion of the defining wall where the sealing member is arranged is made of an aluminum-based metallic material; and the sealing member is made of a material that is softer than the material for the at least a portion of the defining wall where the sealing member is arranged.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority from Japanese Patent Applications Nos. 2011-009921 and 2011-009919, the disclosures of which are incorporated herein by reference in their entireties.FIELD OF THE INVENTION[0002]The present invention relates to an electric storage device including an external terminal.BACKGROUND ART[0003]In recent years, rechargeable and dischargeable electric storage devices such as battery cells (e.g., a lithium ion battery cell and a nickel-metal hydride battery cell) and capacitors (e.g., an electric double layer capacitor) have been adopted as the power sources of vehicles (e.g., an automobile and a motorcycle) and various devices (e.g., a portable terminal and a laptop computer). For example, a battery cell includes an electrode assembly and a case composed of a case body which houses the electrode assembly and a cover plate which covers an opening of the case body. An external terminal is arranged at an outer surface...

Claims

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Application Information

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IPC IPC(8): H01M2/08H01M10/04H01M2/30H01M50/103H01M50/119H01M50/159H01M50/176H01M50/188H01M50/193H01M50/198H01M50/55H01M50/553H01M50/562H01M50/567
CPCH01G9/016H01G9/10H01G11/74H01M2/02H01M2/0217Y10T29/4911H01M2/08H01M10/052H01M10/345Y02E60/13H01M2/0285Y02E60/10H01M50/103Y02P70/50H01M50/562H01M50/193H01M50/198H01M50/159H01M50/567H01M50/55H01M50/553H01M50/176H01M50/188H01M50/119H01M50/531H01M50/15H01G11/70H01G11/82H01G11/84H01M10/0525
Inventor TSUTSUMI, MASAKAZUKAWAMOTO, HAJIMEOKAMOTO, KATSUHIKOYOSHITAKE, SHINSUKETONARI, TAKUMANAKAMURA, JUNKOUNO, KENJI
Owner GS YUASA INT LTD
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