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Secondary battery assembly

A technology for secondary batteries and components, applied in the direction of secondary batteries, battery pack parts, secondary battery manufacturing, etc., can solve the problems of secondary battery deterioration and deterioration, and achieve the effect of inhibiting deterioration and uniform surface pressure

Active Publication Date: 2012-05-02
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If this is the case, especially the deterioration of the secondary battery will be further worsened, so it is not preferable

Method used

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Embodiment Construction

[0047] Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. This aspect is an aspect in which the present invention is applied to a battery pack in which a plurality of lithium ion secondary batteries are stacked and connected to each other.

[0048] The battery pack 1 of this mode, such as figure 1As shown, there are a plurality of single cells 11 , a plurality of contact members 12 and two constraining members 13 . The single cells 11 and the contact members 12 are alternately stacked, and the constraining members 13 are arranged on both sides of the whole. The constraining members 13 on both sides are constrained to each other by respectively fixing both ends of the constraining band 14 . Thus, the restraint member 13 presses the plurality of cells 11 and the like located therebetween from both sides. In this embodiment, the battery pack 1 corresponds to a secondary battery pack.

[0049] Each cell...

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Abstract

The disclosed secondary battery assembly has: a secondary battery formed by enclosing a coiled electrode in a flat, square case; a contact member that is partially in contact with the surface that has the largest surface area (hereafter, the compressed surface) among the exterior surfaces of the secondary battery; and a restraining member that restrains the secondary battery and the contact member. In the secondary battery assembly, due to restraint by the restraining member, the contact member partially compresses the compressed surface. The contact member has multiple contact units, which are provided separately and are in contact with the compressed surface, and multiple connection units, which connect the multiple contact units to each other. The contact units are formed and positioned in such a manner that the contact units: are formed extending from the connection units towards the compressed surface; more strongly compress the compressed surface at offset regions on both sides, which correspond to points removed from the centre of the coiled electrode in the coil axis direction; and more weakly compress the compressed surface at central regions between the offset regions on both sides, which correspond to points more central to the coil axis direction of the coiled electrode.

Description

technical field [0001] The present invention relates to a secondary battery module including a secondary battery in which a wound electrode body is enclosed in a flat and square case. More specifically, it relates to a secondary battery module that constrains the secondary battery in a state where the side surface with the largest area (hereinafter referred to as the pressed surface (pressure receiving surface)) is partially pressed on the outer surfaces of each secondary battery. Background technique [0002] There is a secondary battery in which positive and negative electrode plates are wound or laminated with a separator interposed therebetween, and are enclosed in an outer case together with an electrolytic solution. In such a secondary battery, it is known that gas is generated inside by repeated charge and discharge, which may cause changes in internal pressure, deformation of the outer case, and the like. This is not preferable since the deterioration of the seconda...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M50/209H01M50/291H01M50/466
CPCH01M10/36Y02E60/12H01M10/0587H01M10/0413H01M2/18H01M10/0468H01M2/0217H01M10/0525H01M10/0431H01M2/1061H01M2/1077Y02E60/10H01M50/103H01M50/209Y02P70/50H01M50/466H01M50/291
Inventor 小幡裕之
Owner TOYOTA JIDOSHA KK
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