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Electrochemical cell stack

An electrochemical stacking technology, applied in the field of electrochemical battery stacks, to achieve the effects of increased productivity, reduced internal resistance, and good voltage balance

Inactive Publication Date: 2008-04-23
TOKIN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technique involves extruding the electrode laminate from the inside of the electrochemical cell and thus cannot be applied by devices such as Figure 5 Gasket-sealed electrochemical cell shown

Method used

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  • Electrochemical cell stack
  • Electrochemical cell stack
  • Electrochemical cell stack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] To the polybenzazole as the negative electrode active material, which is composed of units represented by the following formula, in an amount of 20% by weight for the electrode active material, add vapor-phase grown carbon as a conductive auxiliary agent, and add 8% by weight for the electrode active material %, polyvinylidene fluoride having an average molecular weight of 1,100 was added, and the mixture was stirred using a stirrer. The resulting mixture was hot-pressed to form negative electrode 2 (outer diameter: 13.2 mm).

[0058]

[0059] Separately, to polyphenylquinoxaline represented by the following formula as a positive electrode active material, vapor-phase grown carbon as a conductive auxiliary agent was added in an amount of 25% by weight with respect to the electrode active material, and the mixture was stirred using a stirrer . The resulting mixture was hot-pressed to form positive electrode 3 (outer diameter: 13.2 mm).

[0060]

[0061] Fill the ...

Embodiment 2

[0065] An electrochemical cell stack was prepared as described in Example 1 except that a stainless steel plate having a thickness of 100 μm was used as the conductor.

Embodiment 3

[0067] An electrochemical cell stack was prepared as described in Example 1 except that a conductor having a thickness of 200 μm having a protruding portion in the center in the thickness direction was used. In addition to the number of stacked cells, the cross-sectional shape of the electrochemical cell stack is figure 2 mentioned.

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Abstract

The present invention provides for an electrochemical cell stack formed of a plurality of electrochemical cell units each comprising a sheet separator; a pair of cathodic and anodic sheet electrodes impregnated with an electrolytic solution and disposed facing each other either side of the separator; a pair of cathodic and anodic current collectors disposed adjacent the pair of the cathodic and the anodic electrodes respectively; and a gasket surrounding the electrodes for the sealing thereof; €ƒ€ƒ€ƒ the stack including a sheet conductor located between the units thereof; €ƒ€ƒ€ƒ wherein the sheet conductor is arranged such that the outer dimension of its face contacting with a unit is disposed to almost overlap with the inner dimension of the gasket in the unit and which can advantageously provide a more reliable electrochemical cell stack.

Description

technical field [0001] The present invention relates to an electrochemical cell stack in which a plurality of electrochemical cells comprising separators, electrodes, current collectors and gaskets are stacked in series. Background technique [0002] An electric double layer capacitor or a secondary battery generally includes an electrochemical cell having a structure in which a pair of negative and positive electrodes are combined through a separator. Such electrochemical cells can be classified into smaller, so-called coin-type, and rolled-type, which can have a relatively large capacity. [0003] Figure 5 Shown is a cross-sectional view of an electrochemical cell, which is the basic structural unit of a coin-type electric double layer capacitor. In the figure, "2" indicates the polarizable electrode of the negative electrode; "3" indicates the polarizable electrode of the positive electrode; "4" indicates the negative electrode current collector; "5" indicates the posit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G15/00H01G9/00H01G9/155H01M14/00H01M10/00H01M10/40H01M4/70H01M6/42H01M50/463H01M50/529
CPCY02E60/12H01M2/202H01G9/155H01M2/18H01M2/0202H01M4/70Y02E60/13H01M6/42H01M50/463H01G11/12H01G11/82H01G11/80H01G11/28H01G11/76E01C9/086E01C5/08
Inventor 三谷胜哉信田知希纸透浩幸吉成哲也
Owner TOKIN CORP