Closed cell

An airtight, battery technology that is used in secondary batteries, battery pack components, battery boxes/jackets, etc., and can solve problems such as electrolyte leakage, insufficient sealing properties of electrode lead-out pins, and performance degradation.

Inactive Publication Date: 2003-04-16
NEC ENERGY DEVICES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in such a sealed battery, there is a problem that the sealing property at the electrode lead-out pin portion is not good enough, causing performance degradation over time.
[0011] In addition, as shown in FIG. 3(C), a gap 13 is generated between the outer insulating plate 4A and the inner insulating plate 4B between the electrode lead-out pin 6 and the metal plate 3 of the battery end plate, and there is an electrolyte solution through the gap. danger of leakage

Method used

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Embodiment Construction

[0024] The sealed battery of the present invention can provide a battery end plate integrated with the electrode lead-out plate by riveting the electrode lead-out pin after inserting the electrode lead-out pin through the insulating material arranged on both surfaces of the metal plate, By making the contact surfaces of the two insulating members into a stepped shape, etc., not on one surface, so that even if a gap or the like is generated in a part between the two insulating members, one of the two contact surfaces is used to maintain the air. Tightness, a sealed battery that can ensure the airtightness between two insulating members.

[0025] At the same time, by making the contact surface of the insulating member into a step shape or providing unevenness, the airtightness of the contact surface between the two insulating members can be reliably maintained.

[0026] Hereinafter, the present invention will be described with reference to the drawings.

[0027] Fig. 1 is a cross-se...

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Abstract

The invention provides a closed type battery having no electrolyte leakage, etc. and improved airtightness, which comprises a battery header in which an electrode-drawing sheet of polarity opposite to that of a battery can is fixed by caulking to an insulating member fitted into a through-hole in a metal sheet while an electrode-leading pin remains inserted into the through-hole. An internal insulating sheet mounted on the surface of the metal sheet of the battery header located inside the battery can comes into contact at two or more surfaces with an external insulating sheet mounted on a surface of the metal sheet of the battery header located outside the battery can.

Description

Technical field [0001] The present invention relates to a sealed battery, and in particular, to a sealed battery with excellent airtightness for mounting a battery end plate, wherein the battery end plate is provided with battery terminals whose polarity is different from that of a battery sealing case through an insulating member Leading electrode terminal. Background technique [0002] As the power source for small electronic devices, various batteries are used. As the power source for mobile phones, notebook computers, camcorders, etc., small and large-capacity sealed batteries are used, and high-capacity lithium batteries and lithium ion secondary batteries are used. A sealed battery that uses a non-aqueous electrolyte. [0003] Corresponding to the downsizing of equipment, in addition to cylindrical batteries, rectangular sealed batteries that can effectively use small spaces are also used. In the prismatic battery, an electrode terminal separated from a battery sealing case...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/176
CPCH01M2/08Y02E60/122H01M2/06H01M2/0217H01M10/0525Y02E60/10H01M50/103H01M50/176
Inventor 水野弘行塚胁和幸佐藤广行
Owner NEC ENERGY DEVICES LTD
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