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Electrochemical device

a technology of electrochemical devices and electrodes, applied in the direction of electrical devices, metal-working devices, cell structural combinations, etc., can solve the problems of increasing the negative effect of volume energy density, and achieve the effects of improving reliability, reducing the amount of energy consumed, and saving spa

Inactive Publication Date: 2007-01-04
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] Here, the “electronic device” is defined as a device, a circuit and the like for protecting the electrochemical device against current surge and overheat, and thereby improving reliability. The electronic device, for instance, includes protective devices such as a positive temperature coefficient thermistor (a PTC device), a zener diode and a varistor, and temperature sensors such as a thermocouple, a thermistor and a resistance thermometer bulb.
[0011] According to the electrochemical device of this aspect of the present invention, it is possible to save a space and to improve reliability at the same time by burying the electronic device in a fame body or a sealing plate.
[0016] According to this electrochemical device, it is possible to form the electronic device as a thin film by the screen printing method, and to bury the electronic device easily in the frame body.

Problems solved by technology

Meanwhile, in these electrochemical devices, level of the volume energy density increases adverse effects when a current surge and overheat occur.

Method used

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Examples

Experimental program
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first embodiment

[0022] In a first embodiment, an electric double layer capacitor provided with a fame body having concave shape and a sealing plate will be described as an example of an electrochemical device.

[0023] As shown in FIG. 1, the electric double layer capacitor includes a pair of polarizable electrodes 1a and 1b, a separator 2 interposed between the pair of polarizable electrodes 1a and 1b, and an electrolytic solution to be impregnated into the pair of polarizable electrodes 1a and 1b and the separator 2 In addition, a container for housing the pair of polarizable electrodes 1a and 1b and the electrolytic solution includes a frame body 3 having concave shape and a sealing plate 5 for sealing an opening of the frame body 3.

[0024] A collector 4a is disposed on an inner bottom surface of the frame body 3, and a collector 4b is disposed on an inner surface of the sealing plate 5 at the side of the polarizable electrode 1b. Note that the polarizable electrode 1a is joined to the collector 4...

second embodiment

[0037] In a second embodiment, an electric double layer capacitor provided with a frame body having concave shape and a sealing plate will be described as an example of the electrochemical device.

[0038] As shown in FIG. 4, the electric double layer capacitor includes a pair of polarizable electrodes 1a and 1b, a separator 2 interposed between the pair of polarizable electrodes 1a and 1b, and an electrolytic solution to be impregnated into the pair of polarizable electrodes 1a and 1b and the separator 2. In addition, a container for housing the pair of polarizable electrodes 1a and 1b and the electrolytic solution is configured of a frame body 3 having concave shape and a sealing plate 5 for sealing an opening of the frame body 3.

[0039] A collector 4a is disposed on an inner bottom surface of the frame body 3, and a collector 4b is disposed on an inner surface of the sealing plate 5 on the side of the polarizable electrode 1b. Note that the polarizable electrode 1a is joined to the...

example 1

[0055] In Example 1, the polarizable electrodes 1a and 1b are fabricated, and concurrently, the electrolytic solution is prepared to produce an electric double layer capacitor as shown in FIG. 1.

[Fabrication of Polarizable Electrodes]

[0056] The polarizable electrodes 1a and 1b in a square shape having a side of 3.8 mm and a thickness of 0.5 mm are formed by adding 5 wt % of acetylene black and 5 wt % of polytetrafluoroethylene (PTFE) to activated carbon powder having a specific surface area of 2000 m2 / g, and by kneading these materials.

[Preparation of Electrolytic Solution]

[0057] An electrolytic solution is prepared by dissolving (C2H5)4NBF4, which is a solute, into a propylene carbonate as a solvent to achieve a concentration of 1 mol / l.

[Production of Electric Double Layer Capacitor Cell]

[0058] The two polarizable electrodes 1a and 1b fabricated as described above are disposed so as to face each other while interposing the separator 2 made of glass fibers therebetween. This g...

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PUM

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Abstract

An electrochemical device includes a pair of electrodes, an electrolytic solution, and a container for containing the pair of electrodes and the electrolytic solution. The container includes a frame body having concave shape and a sealing plate configured to seal an opening of the frame body, and an electronic device is buried in the frame body or the sealing plate.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2005-190302, filed on Jun. 29; the entire contents of which are incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to an electrochemical device including a pair of electrodes, an electrolytic solution, and a container for housing the pair of electrodes and the electrolytic solution. [0004] 2. Description of the Related Art [0005] Electrochemical devices having high volume energy density, such as chemical cells and electric double layer capacitors, have been conventionally used in back-up power supplies and auxiliary power supplies for cellular telephones and home appliances. A higher performance of such electrochemical devices has been expected. [0006] These electrochemical devices are soldered and mounted on printed circuit boards of various electro...

Claims

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Application Information

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IPC IPC(8): C25D17/00H01G2/14H01G9/12H01G11/00H01G11/16H01G11/22H01G11/24H01G11/38H01G11/42H01G11/78H01G11/80H01G11/84H01M50/103
CPCH01G9/08H01G9/155H01M2/02H01M2/0287H01M6/50C25D17/004H01M10/425H01M2200/106Y02E60/13C25D17/02H01M10/42Y02E60/10H01M50/124H01G11/80H01G11/74H01G11/78H01M50/103
Inventor NAKAHARA, YASUOKATO, KIKUKOKIMOTO, MAMORU
Owner SANYO ELECTRIC CO LTD
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