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Closed type capacitor

A capacitor, airtight technology, used in capacitors, electrolytic capacitors, double-layer capacitors, etc., can solve the problems of electrolyte retention, valve misoperation, insufficient gas-liquid separation function of the filter, etc., to prevent deterioration and prevent electrostatic capacity. the effect of falling

Inactive Publication Date: 2007-07-25
NISSHINBO IND INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, when the internal pressure of the capacitor rises and the gas is released from the pressure relief valve, it is often seen that the electrolyte passes through the valve, so that the electrolyte stays in the communication channel inside and outside the container, and then the electrolyte crystallizes due to evaporation, resulting in blockage of the communication channel. , or cause other problems such as misoperation of the valve
[0010] In order to solve this problem, a method has been developed in which a porous filter having a gas-liquid separation function is provided inside the pressure relief valve to prevent the stagnation of the electrolyte in the valve (Patent Document 8: Japanese Patent Laid-Open No. 2000-195761). The gas-liquid separation function of the filter is insufficient, and the precipitation of electrolyte salt cannot be completely prevented

Method used

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  • Closed type capacitor
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no. 1 Embodiment approach

[0099] The sealed capacitor 1 of the first embodiment of the present invention, as shown in FIG. 1, a packaging container 10 having gas barrier properties, a polarizable electrode laminate 12 contained in the packaging container 10, and an ionic liquid It is composed of a non-aqueous electrolyte solution (not shown in the figure) of an electrolyte containing more than 30% by mass.

[0100] The polarizable electrode laminate 12 is a laminate 11A formed by laminating a plurality of polarizable electrodes constituting the positive and negative poles and separators between these two poles, and welded from the container 10 The current output terminals 11B and 11C extending from the inside to the outside are formed.

[0101] The aluminum laminate film constituting the packaging container 10 is a three-layer laminate film of an outer layer 10C made of nylon, a gas barrier layer 10D made of soft aluminum, and an inner layer 10E made of polypropylene, as shown in FIG. 2.

[0102] In additi...

no. 2 Embodiment approach

[0105] Fig. 3 shows a sealed capacitor 2 according to a second embodiment of the present invention. In addition, in the following description, the same reference numerals are used for the same components as those of the first embodiment, and the description thereof is omitted.

[0106] The sealed capacitor 2 includes a resin case (packaging container) 20 having gas barrier properties and a plurality of electrical storage elements 30 housed in the resin case 20.

[0107] The resin case 20 is composed of a box 21 having a substantially rectangular bottom plate 21A in plan view, side walls 21B set up on the four peripheries of the bottom plate 21A, an upper outlet 21C, and a cover provided to cover the outlet 21C 22 constitute. Moreover, the box body 21 and the cover body 22 are formed by insert molding to form a laminate, which is laminated with a resin layer, an aluminum foil layer, and an adhesive layer in order from the inside to the outside of the resin case 20 , A laminate of m...

Embodiment 1

[0130] Coconut shell activated carbon (YP-17, manufactured by Kuraray Kemikalu (Company)) was used as the active material, HS-100 (manufactured by Denka Chemical Industry (Company)) was used as the conductive material, and PVDF (manufactured by Aldrich Co., Ltd., weight average molecular weight was 534,000) As a binder resin, a composition for electrodes prepared by mixing with a composition (mass ratio) of 90:5:5 is applied to both sides of an aluminum current collector foil (20CB, manufactured by Japan Accumulator Industry Co., Ltd.) Attach and dry to make a polarizable electrode.

[0131] Then, polarizable electrodes are laminated via a cellulose separator (TF40-50, manufactured by Nippon High Paper Industry Co., Ltd.). As shown in Figure 1, each electrode is commonly connected to aluminum current output terminals (terminals). ) 11B and 11C are welded to obtain a polarizable electrode laminate 12.

[0132]On the other hand, it is manufactured by aluminum laminate (Dainippon Pri...

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Abstract

A closed type capacitor includes: an external container (10) which cuts off gas; a pair of polarized electrodes contained in the external container (10); a separator arranged between the electrodes; and a non-aqueous electrolytic liquid containing electrolyte and a non-aqueous organic solvent if necessary. The external container (10) has an opening (10A) for communication between inside and outside the container and a valve mechanism (13) which is arranged to cover the opening (10A) and which is opened and closed by the pressure difference between the inside and outside the container (10). The electrolyte contains more than 30 mass % of ion liquid. This closed type capacitor can minimize separation of electrolyte in the valve path.

Description

Technical field [0001] The present invention relates to a sealed capacitor, and more specifically, to a sealed capacitor provided with a valve mechanism in a packaging container. Background technique [0002] It is known that an electric double layer capacitor using a non-aqueous electrolyte solution decomposes the electrolyte solution or electrode material and generates gas from the capacitor element due to the influence of impurities such as moisture mixed into the system due to charging and discharging. [0003] Therefore, as a packaging container for an electric double layer capacitor, a closed container made of a packaging material with gas barrier properties in which water does not mix into the capacitor element is generally used. Known as such airtight containers, specifically, electric double layer capacitors using metal shells for packaging containers (Patent Document 1: JP 11-74148 A), and packaging containers using laminated films of synthetic resin and metal film Elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/038H01G9/155H01G9/12H01G11/10H01G11/58
CPCY02E60/12H01M2/1229H01G11/10H01G9/12H01G9/155H01G11/58H01M2/1276Y02E60/13H01G9/038Y02E60/10H01M50/325H01M50/333H01G11/18
Inventor 吉田浩小谷美嗣丸金祥子中川英重滨田敏宏东阳二
Owner NISSHINBO IND INC