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Battery module

A technology for battery modules and battery packs, which is applied in the direction of secondary batteries, battery temperature control, battery cover/end cover, etc., and can solve problems such as deformation, difficult battery pack exerting surface pressure, and rigidity reduction

Active Publication Date: 2008-03-05
ENVISION AESC JAPAN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when the module case is formed of a thinner sheet-like material in order to reduce weight and / or to make the module case easier to form into a desired shape, the rigidity of the inwardly protruding portion is reduced, and the inwardly protruding portion tends to follow the shape of the battery. deformed by the contour of the surface
Thus, it is difficult to apply proper surface pressure to the battery pack

Method used

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Embodiment Construction

[0019] Preferred embodiments of the present invention are explained below with reference to the accompanying drawings. Those skilled in the art can understand from this disclosure that the following descriptions of the embodiments of the present invention are provided for illustration only, not for the purpose of limiting the present invention, and the present invention is defined by the appended claims and their equivalents.

[0020] Referring first to FIG. 1 , there is shown a battery module according to a first embodiment of the present invention. As shown in FIG. 1 , the battery module in this embodiment has a module case 1 and a battery pack 2 contained therein. The module housing 1 comprises a housing body 3 having an opening 4 in its upper part and a cover element 20 which acts to close the opening 4 . The housing body 3 and the cover element 20 are connected by seam folding (folding the edges together) to form the module housing 1 . The battery pack 2 includes a plur...

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Abstract

A battery module is provided with a battery cell stack and a module case. The battery cell stack includes a plurality of stacked flat secondary battery cells. The module case includes an inwardly protruding section, a low rigidity section and a high rigidity section. The inwardly protruding section is disposed on at least one of two oppositely facing sides of the module case that faces in a battery cell stacking direction and protruding toward the interior area of the module case to apply pressure to an end surface of the battery cell stack. The low rigidity section elastically supports a periphery of the inwardly protruding section due the low rigidity section having a lower rigidity than the inwardly protruding section. The high rigidity section supports a periphery of the low rigidity section with the high rigidity section having a higher rigidity than low rigidity section.

Description

[0001] This application claims priority from Japanese Patent Application No. 2006-236576 filed on August 31, 2006, the entire disclosure of which is incorporated herein by reference. technical field [0002] The present invention generally relates to a battery module having a battery cellstack consisting of a plurality of flat cells stacked one above the other and enclosed in a case. Background technique [0003] In recent years, a proposal to use a battery module as a power source of an electric vehicle or a hybrid vehicle is being considered (for example, Japanese Patent Application Laid-Open No. 2005-108693). The battery module includes a plurality of flat battery cells stacked in a thickness direction to form a battery pack and enclosed inside a case (hereinafter referred to as a module case). Each flat battery cell of the battery pack includes a power supply element sealed with a liquid electrolyte on the inside of a laminated film or other sheet-like outer material. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/10H01M10/60H01M10/613H01M10/625H01M10/647H01M10/6556H01M10/6561H01M50/211H01M50/224H01M50/271
CPCY02E60/12B60L1/003H01M10/0481B60L11/1879H01M10/5004B60L11/1874Y02T10/705H01M2/1061H01M10/5067Y02T10/7005H01M2/1077H01M10/5073H01M10/6563H01M10/6566H01M10/613B60L58/26B60L50/64Y02T10/70Y02E60/10H01M50/224H01M50/271H01M50/211H01M10/647H01M50/242H01M2220/20
Inventor 高松俊文田附知则
Owner ENVISION AESC JAPAN LTD