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Battery module

A technology for combining batteries and flat batteries, which is applied to battery components, circuits, electrical components, etc., and can solve problems such as stress concentration

Inactive Publication Date: 2007-12-12
ENVISION AESC JAPAN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When vibration is applied to be borne by the assembled battery, it may cause stress concentration on the part used to connect the electrode terminals to each other

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0081] The direction of the X-axis shown in FIG. 1 will be referred to as the longer direction of the assembled battery 50, the battery unit 60, the case 70, etc., and the direction of the Y-axis will be referred to as the shorter direction thereof. Therefore, the surface located on the front side in the longer direction in FIG. 1 is referred to as the front surface, and the surface located on the rear side in the longer direction is referred to as the rear surface. In the following description, the flat battery is simply abbreviated as "battery".

[0082] Referring to FIGS. 1 and 2 , assembled battery 50 contains within housing 70 a battery cell 60 containing a plurality (eight in the example) of batteries 100 (generally 101-108). The assembled battery 50 is mounted on a vehicle such as, for example, an automobile or an electric train that generates vibration transmitted to the battery unit 60 . Although not shown, an on-vehicle battery pack conforming to required current, v...

no. 2 example

[0171] The second embodiment differs from the first embodiment in that the structure of the spacer 230 and the way of interconnecting the electrode tabs 222 and 224 are changed.

[0172]Similar to the first embodiment, the assembled battery 210 of the second embodiment has a plurality of stacked batteries 220 and the electrode terminals 222 and 224 of each battery 220 are electrically connected to each other. The plate-like electrode tabs 222 and 224 are formed by drawing out from the package. The assembled battery 210 is also provided with a plate-shaped electrically insulating spacer 230 adapted to hold the electrode tabs from opposite surface sides of the electrode tabs 222 and 224 along the battery stacking direction (vertical direction in FIG. 40 ). The plurality of batteries 220 are housed in the case 240 in such a manner that the electricity generating elements are compacted.

[0173] The battery 220 is a flat-shaped battery as shown in FIG. 41 . A stacked type electr...

no. 3 example

[0206] Similar to the first embodiment, the positioning function of the spacer during stacking of the batteries 220 can be added to the function of the spacer 230 in the second embodiment.

[0207] Next, a third embodiment will be described for a spacer having a positioning function.

[0208] As shown in FIGS. 48 and 49 , spacer 270 in the third embodiment is formed in a three-layer structure including insulating layer 274 having insulating properties sandwiched by heat dissipation layers 272 having heat radiation properties. Here, the heat dissipation layer 272 forming the uppermost layer is provided with a raised portion 271 (corresponding to a convex portion). Then, the heat dissipation layer 272 forming the lowermost layer is provided with a concave portion 273 . The convex portion 271 and the concave portion 273 have approximately the same diameter and depth, and are provided at corresponding positions on the front and rear surfaces of the heat dissipation layer 272 .

...

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PUM

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Abstract

A battery module has stacked therein a plurality of flat cells each formed by sealing a power generating element with a package member and deriving to the exterior electrode tabs from the package member and has the electrode tabs of the flat cells connected electrically. The battery module includes electrically insulated spacers adapted to nip the electrode tab from the opposite surface sides of the electrode tab along the stacking direction of the plurality of flat cells. The paired spacers nipping the electrode tab include an engaging member adapted to fasten the electrode tab by being passed through the electrode tab along the stacking direction.

Description

technical field [0001] The invention relates to an assembled battery. Background technique [0002] There is known a flat thin battery (hereinafter referred to as "flat battery") formed by encapsulating an electricity generating element with a package such as a laminated film and drawing out plate-like electrode terminals from the package (hereinafter referred to as "flat battery"), wherein the electricity generating element The element is formed by laminating positive and negative electrode plates. In recent years, it has become fashionable to produce a high-output and high-capacity assembled battery by stacking a plurality of such flat batteries while electrically connecting the individual flat batteries in series and / or parallel (refer to Unexamined Japanese Patent Publication JP -A-200-195480 and JP-A-2001-256934). [0003] For example, in order to mount the assembled battery thus formed on a vehicle, efforts have been made to minimize the distance between adjacent fla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/10H01M2/20H01M50/242H01M50/244H01M50/249H01M50/262H01M50/291H01M50/509H01M50/553H01M50/566H01M50/569H01M50/593
CPCY02E60/12B60L2200/26
Inventor 太田正保雨谷竜一矶永泰介大上悦夫
Owner ENVISION AESC JAPAN LTD
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