CN1391244A

CN1391244A - Dual-layer capacitor

Info

Publication number: CN1391244A
Application number: CN 01118705
Authority: CN
Inventors: 王国庆; 王然
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-07
Filing date: 2001-06-07
Publication date: 2003-01-15
Anticipated expiration: 2021-06-07
Also published as: CN1185662C

Abstract

A power capacitor with dual electric layers features that its inside has several single bodies connected serially, its shell is sealed by elastic metal sheet, and said single body is composed of two electric collectors, two wrapping bodies, a PE membrane, and two activating electrodes. Its advantages are low equivalent serial resistor, high capacity, low leakage and fast charging and discharging.

Description

Double electric layer capacitor

The invention belongs to field of electrical components, relate to a kind of low ESR, jumbo double electric layer capacitor.

Progress along with informationization technology, intelligent instrumentation constantly occurs, the appearance of instrumentation instrument such as particularly various intelligent ammeters, water meter, gas meter, because they at work, not only need preservation to data message, simultaneously, also should possess when outage or automatic unlatching of when usurping and Shuttoff Valve function.Therefore, should dispose the back-up source that to realize above-mentioned functions.

Back-up source in the past often adopts common batteries, and battery can be realized the effect of protection information and driving valve, but the useful life of battery is short, needs running check and replacing, as the function of no-voltage detection announcement, will cause the forfeiture of information protection and driving function.Use rechargeable battery to make back-up source, not only increased the complexity of circuit, and to discharge and recharge number of times be limited after all.

The eighties double electric layer capacitor occurred since the initial stage, and it is playing a good role aspect the protection CMOS memory data.But because equivalent series resistance is bigger, abrupt release power is less, can not drive devices such as electromagnetically operated valve, electrical micro-machine, midget relay, therefore, has very big defective when using.

Owing to above reason, need the more superior electronic component of a kind of performance to realize these functions, this also is a purpose of the present invention.

Double electric layer capacitor in the past, monomer whose is to adopt noble metal or conductive rubber to make collector electrode, activated electrode is mixed and made into by activated carbon and adhesive, is the asbestos paper of the lower plastic film of ionic conductivity or intensity, toughness extreme difference every utmost point material, and monomer is directly encapsulated by metal shell.Its shortcoming is that equivalent series resistance is big, capacity is little, because the coefficient of expansion that monomer and metal shell are met when cold and hot is different, makes the high low temperature less stable of product.

The present invention realizes according to following technical proposals, between the bottom of shell and monomer a high resiliency sheet metal is housed, be used for guaranteeing shell under all temps environment to the monomer pressure unanimity; The collector electrode of monomer is the conductive polymer plastic cement, and the one side alligatoring that it is contacted with activated electrode.Activated electrode is to be mixed and after heat treatment formed high-specific surface area, high conduction active electrode material by activated carbon and high conductive carbon black, the activated electrode adhesive that undopes; Constitute by the PE film every utmost point material; Faying face between collector electrode and the encapsulated member merges by the method for high temperature bonding, constitutes the monomer of a good seal, because the monomer high conformity, product can require overlapped in series according to applied voltage, and the stack number can reach 30.

With the double electric layer capacitor (power capacitor) that the present invention makes, its equivalent series resistance is 1/4 of a former product of the same type, and capacity increases by 25%, and extremely low leakage current and high preferably low-temperature stability and reliability are arranged.(number of times reaches 10 for quick charge and discharge ⁵More than) and good self-discharge characteristics, can guarantee its reliability as stand-by power supply.

Description of drawings:

Fig. 1 capacitor overall structure schematic diagram;

Fig. 2 monomer structure schematic diagram;

Among Fig. 1,1 is metal shell, the port crimping; 2 for preventing the insulating sleeve of the two poles of the earth short circuit; 3 draw pole piece in being; 4 for drawing pole piece outward, and it and shell constitute negative pole; 5 one group of monomer for stack; 6 is metal platen; 7 is the elastic metallic compressing tablet.

Among Fig. 2,1 is two encapsulated members up and down; 2 two collector electrodes making for conductive plastic; 3 is the PE film, is clipped between two encapsulated members; 4 for containing the electrolytical activated electrode of certain proportion, and it is that mixture by activated carbon and conductive carbon constitutes.

Claims

1. one kind low internal resistance double electric layer capacitor is characterized in that, seals several monomers by shell by the elastic metallic compressing tablet and forms, and monomer is to be made of two collector electrodes, two activated electrodes, two encapsulated members and a PE film.

2. according to the described capacitor of claim 1, it is characterized in that activated electrode is the low resistance electrode that is combined to form by activated carbon and carbon.

3. according to the described capacitor of claim 1, it is characterized in that, is good by chemical stability every utmost point diaphragm, and the PE film that ionic conductivity is high is made.

4. according to the described capacitor of claim 1, it is characterized in that collector electrode is to be made by air-tightness and the good conductive polymer plastic cement of ageing resistance.

5. according to the described capacitor of claim 1, it is characterized in that,, can be formed by stacking by 2 to 30 monomers according to the requirement of voltage.