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Electrochemical device

An electrochemical and electrode technology, applied in the field of electrochemical devices, can solve the problem of insufficient suppression of shaking of power generation components, and achieve the effect of high vibration resistance and high impact resistance

Active Publication Date: 2013-04-10
GS YUASA INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the protection by such a sheet, when a strong vibration or shock is received, it may not be possible to sufficiently suppress the shaking of the power generating element in the outer casing, resulting in deformation of the current collector or penetration of the current collector into the power generating element. , resulting in an internal short circuit

Method used

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  • Electrochemical device
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Experimental program
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Effect test

Embodiment approach 1

[0056] Below, refer to Figure 1 to Figure 6 Embodiment 1 will be described in detail.

[0057] The electrochemical device according to the present embodiment is a large lithium ion battery (hereinafter referred to as a cell B1 ), which is a type of non-aqueous electrolyte secondary battery mounted on a vehicle such as an electric car or a hybrid car. This unit cell B1 is a square battery in which a flat power generating element 10 is housed in a square exterior body 20 , and the interior of the exterior body 20 is filled with an electrolytic solution. Hereinafter, in each figure, the direction of the symbol U indicates the upper side of the battery B1, the direction of the symbol F indicates the front side of the battery B1, and the direction of the symbol R indicates the right side of the battery B1.

[0058]The power generating element 10 is formed by winding a stacked body between a positive electrode plate and a negative electrode plate with a separator interposed thereb...

Embodiment approach 2

[0088] Figure 7 to Figure 9 Embodiment 2 is shown. The difference from Embodiment 1 above lies in the structure of the spacer, and other points are the same as Embodiment 1 above. Therefore, the same reference numerals as those in Embodiment 1 will be assigned and redundant descriptions will be omitted, and only differences will be described below. In each figure, the direction of the symbol U indicates the upper side of the battery B2, the direction of the symbol F indicates the front side of the battery B2, and the direction of the symbol R indicates the right side of the battery B2.

[0089] The unit cell B2 of the present embodiment includes a pair of side spacers 50 , 50 and a bottom spacer 60 . The pair of side spacers 50 are attached to the positive electrode portion 10A and the negative electrode portion 10B of the power generating element 10 , respectively, similarly to the above-mentioned separator 30 . Each side spacer 50 is made of synthetic resin, and is forme...

Embodiment approach 3

[0097] Figure 10 Embodiment 3 is shown. The difference from Embodiment 2 above lies in the structure of the spacer, and other points are the same as Embodiment 2 above. Therefore, the same reference numerals as those in Embodiment 2 will be assigned and redundant descriptions will be omitted, and only differences will be described below. In addition, in Figure 10 In the description, the direction of the symbol U indicates the upper side of the battery B3, the direction of the symbol F indicates the front side of the battery B3, and the direction of the symbol R indicates the right side of the battery B3.

[0098] The battery cell B2 of the present embodiment includes a pair of side spacers 70 , 70 . The pair of side spacers 70 are attached to the positive electrode portion 10A and the negative electrode portion 10B of the power generating element 10 , similarly to the above-mentioned separator 30 . Each side spacer 70 is made of synthetic resin, and is formed, for exampl...

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PUM

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Abstract

An electrochemical device includes a power generating element, an outer package, a current collector, and a movement restricting member. The power generating element includes a main portion and a terminal portion. The main portion includes an electrode prepared by forming an active material layer on a metal foil surface of the electrode. The terminal portion is provided on a side of the main portion. The outer package houses the power generating element. The current collector is connected to the terminal portion of the power generating element. The movement restricting member includes a holding portion arranged between the side of the main portion of the power generating element and an inner surface of the outer package opposite the side of the main portion.

Description

technical field [0001] The invention relates to an electrochemical device. Background technique [0002] Conventionally, electrochemical devices such as batteries and electric double layer capacitors are known in which a power generating element having an electrode plate having an active material layer formed on a metal foil surface is housed in an outer casing (see, for example, Patent Document 1 below). Generally, a portion where no active material layer is formed (a portion where the metal foil is exposed) is provided on the electrode plate of the power generating element, and a current collector is connected to this portion, and the current collector is connected to an electrode terminal for inputting and outputting electric power. [0003] prior art literature [0004] patent documents [0005] Patent document 1: JP 2010-238469 publication [0006] However, the above-mentioned electrochemical device is protected from vibration and shock by interposing a synthetic res...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01M50/533
CPCH01M2220/20H01M50/533Y02E60/10Y02P70/50H01M50/20H01M50/10H01M10/0525
Inventor 胁彰吾增田英树内田真弘伊藤瞬入江诚一
Owner GS YUASA INT LTD