JPH04233170A - Capacitor integrated battery - Google Patents

Abstract

PURPOSE:To enable large-current discharge and miniaturization by forming a capacitor and a battery integrally and providing them with an electric jar in common. CONSTITUTION:A capacitor B and a battery A hold one part each or all of an electric double capacitor stainless foil electric jars 1, 5, and 8 doubling as collectors, and those are made integrally through plugs 4 inside a single element. Hereby, there is no necessity of electrically connecting the capacitor with the battery, so large-current discharge becomes possible, and also it can be miniaturized by improving volume efficiency.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small power source used for memory backup, etc., and particularly to a battery that is a combination of a capacitor and a small battery.

0002

2. Description of the Related Art In recent years, with the miniaturization of electronic equipment, the introduction of microcomputers and the use of semiconductor memories have been actively promoted, and along with this, there has been a strong demand for the development of compact memory backup power supplies. As such a compact power source for memory backup, a combination power source that combines a small battery and an electric double layer capacitor has been used. The electric double layer capacitor is basically composed of a polarizable electrode mainly composed of activated carbon and an organic electrolyte, and has a cylindrical or square shape, and is characterized by large capacity and low impedance. It is suitable for use in the above-mentioned power source capable of large current discharge, and as a small battery, sheet batteries that use oxides such as manganese for the positive electrode and lithium or lithium alloy powder for the negative electrode are thin, small, and have a small volume. It is attracting attention because of its high efficiency.

0003

Recently, as electronic devices have become lighter, thinner, and smaller, there has been a demand for compact power supplies that are thinner, smaller, and have excellent volumetric efficiency. In particular, when a small power source consisting of an electric double layer capacitor and a sheet battery as described in the prior art is mounted on a printed circuit board, there is a problem in that it occupies a larger space than other components.

The present invention has been made in view of the above-mentioned problems, and its object is to provide a compact power supply that is capable of discharging a large current, is thin, small, and has excellent volumetric efficiency.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the capacitor-integrated battery of the present invention is composed of a capacitor B and a battery A, and the capacitor B and the battery A are arranged in battery cases 1, 5 and 8. The capacitor B and the battery A are integrally formed within a single element with a sealing body 4 interposed therebetween.

[0006]

[Operation] Since the electric double layer capacitor and the battery are integrally formed, there is no need for connection between them, and the battery case can be shared.

[0007]

[Example] The details of the present invention will be explained below with reference to an example. FIG. 1 is a sectional view of a capacitor-integrated battery of the present invention, and FIG. 2 is a perspective view of the same external appearance. Here, 1 is a battery case made of stainless steel foil that also serves as a current collector of an electric double layer capacitor, 2 is a polarizable electrode made of activated carbon or carbon fiber, and 3 is a polarizable electrode made of activated carbon or carbon fiber.
is an electrolyte layer made of a polypropylene microporous membrane and an organic electrolyte, 4 is a sealing body made of modified polypropylene, 5 is a battery case made of stainless steel foil that also serves as the positive electrode current collector of the battery, and 6 is a positive electrode active made of vanadium oxide. The material, 7, is a negative electrode active material made of graphitized carbon, and 8 is a battery case made of stainless steel foil, which serves as a current collector of an electric double layer capacitor and a negative electrode current collector of a battery.

In a configuration consisting of one electric double layer capacitor B and one battery A as shown in FIG. 2, a total of four terminals can be drawn out, two terminals from battery A and two terminals from capacitor B, but depending on the usage. Accordingly, three terminals can be used as shown in FIG. 3(a) where two terminals are shared. Furthermore, the circuits (b) and (c) in FIG. 3 can be constructed by incorporating two or more capacitors in one battery case.

In addition to the above embodiments, the positive electrode active material 6 may be made of oxides such as titanium, cobalt, nickel, and niobium. Further, as the negative electrode active material 7, powder of an intercalation compound such as WO2 or MoO2 can be used.

0010

[Effects of the Invention] As described above, the present invention has a capacitor and a battery formed integrally, and is capable of discharging a large current.
A compact power supply that is thin, small, and has excellent volumetric efficiency can be provided.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a capacitor-integrated battery showing one embodiment of the present invention.

FIG. 2 is an external perspective view of FIG. 1;

FIG. 3(A) is a circuit diagram showing an embodiment of the present invention. (b) is a circuit diagram showing another embodiment of the present invention. (c) is a circuit diagram with a different connection method from (b).

[Brief explanation of symbols]

A Battery B Capacitor 1, 5, 8 Battery case 4 Sealing body

Claims (1)

[Claims] 1. A capacitor-integrated battery consisting of a capacitor (B) and a battery (A), the capacitor (
B) and the battery (A) share part or all of the battery case (1, 5, 8), and the capacitor (B) and the battery (A) share a part or all of the battery case (1, 5, 8), and the capacitor (B) and the battery (A) ) is formed integrally with a capacitor integrated battery.