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Sealing body and cell pack using the same

A sealing body and battery pack technology, which is applied to battery pack components, batteries, secondary batteries, etc., and can solve the problems of larger volume and large battery pack volume

Inactive Publication Date: 2008-05-07
TYCO ELECTRONICS RAYCHEM BVBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this battery pack, since a recess is formed on the bottom surface of the can, and the PTC component is arranged in the recess, as a result, the volume of the entire can required as a battery increases corresponding to the recess.
Therefore, in the case of a battery pack in which the PTC component is arranged at the bottom of the can, the volume of the battery pack becomes larger in the same manner as in the case of disposing the PTC component on the side surface of the can.

Method used

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  • Sealing body and cell pack using the same
  • Sealing body and cell pack using the same

Examples

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Embodiment Construction

[0028] In the present invention, the PTC part is a general polymer PTC part having a PTC element and an electrode, and the PTC element is formed of a conductive polymer (such as polyethylene) dispersed with carbon black as a conductive filler (preferably a layer shaped PTC element), the electrodes are arranged on both sides of the PTC element (preferably a layered electrode of metal material, more preferably a foil electrode).

[0029] However, a particularly preferable PTC component contains nickel powder or nickel or cobalt alloy powder as a conductive filler as a filler. In addition, such an alloy may constitute only the surface portion of the particles constituting the powder as the conductive filler, and the inner portion may be composed of nickel. Such cobalt-containing nickel powder is disclosed, for example, in WO2005-023461, and it is particularly preferable to use a polymer PTC component containing the nickel powder disclosed above as a filler in the present inventio...

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PUM

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Abstract

A cell pack includes a secondary cell having a can-shaped body (100) and a sealing body (102) for sealing an opening of the can-shaped body (100) and a PTC element (120). The cell pack may be made compact by the sealing body having the PTC element mounted thereon.

Description

technical field [0001] The present invention relates to a sealing body (or a sealing plate) and a battery pack having the sealing body. Background technique [0002] Various rechargeable batteries are used in portable electric or electronic devices. In such a device, various studies have been conducted in order to minimize the volume occupied by components constituting it, such as a secondary battery pack. [0003] Even if the size is to be minimized, the original function and the subsidiary function of the device must not be hindered. The rechargeable battery used in the portable device is equipped with a PTC part to prevent the flow of excess current in advance when the battery is charged and discharged, or Prevent devices or components from becoming abnormally high in advance. [0004] As such a PTC component, a so-called polymer PTC component (or PPTC component) in which electrodes are arranged so as to sandwich electrical polymer elements in which carbon black is disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/04H01M50/147
CPCY02E60/12H01M2/0404H01M2/348H01M10/486H01M2200/106Y02E60/10H01M50/147H01M50/581Y02P70/50H01M50/183
Inventor 莲沼贵司田中新小山洋幸
Owner TYCO ELECTRONICS RAYCHEM BVBA