JP2001297951A - Flat capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat capacitor having excellent volume efficiency. SOLUTION: In the flat capacitor formed by laminating cathode foil, electrolytic paper, and anode foil, a first flat capacitor including a first electrode part, and a second flat capacitor including a second electrode part are accommodated into the same package.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a flat capacitor formed by laminating a cathode foil, electrolytic paper and an anode foil.

[0002]

2. Description of the Related Art An example of a flat capacitor is an aluminum electrolytic capacitor, which is used, for example, to store strobe light emission energy of a camera. JP-A-7-1105
No. 11 discloses an example in which the size of a camera is reduced by devising a method of installing an aluminum electrolytic capacitor for strobe light emission.

[0003]

However, in the above-mentioned Japanese Patent Application Laid-Open No. Hei 7-110511, the main capacitor for strobe light emission is indicated by 9A and 9B in FIG.
Although the camera is miniaturized by dividing it into two or more, the shape of the condenser is cylindrical, and the hatched portion in FIG. 8 becomes a useless space, which hinders further miniaturization of the camera. Was.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a flat capacitor with good volume efficiency by housing a plurality of capacitors in one package. It is in.

It is another object of the present invention to provide a more compact flat capacitor by forming a plurality of capacitors with one common cathode foil.

[0006]

According to a first aspect of the present invention, there is provided a flat capacitor formed by laminating a cathode foil, electrolytic paper, and an anode foil. And a second flat capacitor including the second electrode portion are housed in the same package.

According to a second invention, in the flat capacitor according to the first invention, the first electrode portion and the second electrode portion are led out from different end faces of the package.

A third invention is directed to the flat capacitor according to the first invention, wherein the first electrode portion and the second electrode portion are provided.
Are derived from the vicinity of the bonding surface of the package.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, the outline of the present embodiment is as follows. In the present embodiment, first, when forming a flat capacitor by stacking the cathode foil, the electrolytic paper, and the anode foil, a plurality of flat capacitors are housed in one package to reduce the mounting volume. It is an object. Also, the electrodes of each capacitor are led out from different end faces to prevent contact between the terminals. Further, the electrodes of each capacitor are led out from the vicinity of the joint surface of the package, thereby facilitating drawing out to the outside. Furthermore, the capacitor is reduced in size by using a common cathode foil for a plurality of capacitors. Further, by arranging the anode terminal of each capacitor symmetrically about the cathode terminal, a capacitor which is safe and easy to manufacture is provided.

(First Embodiment) FIG. 1 is an overall configuration diagram of a flat capacitor according to a first embodiment of the present invention. Reference numeral 1 denotes a main body, in which a plurality of capacitors (capacitors 1,
A capacitor 2) is enclosed. 2a and 2b are first electrode portions (first electrode terminals) of the capacitor 1, 2a is an anode,
2b is a cathode. Reference numerals 3a and 3b denote second electrode portions (second electrode terminals) of the capacitor 2, wherein 3a is an anode and 3b is a cathode.

FIG. 2 is a diagram showing the inside of the capacitor described in FIG. The laminate case 10 is an exterior of the capacitor, and is formed by attaching a box-shaped recess to a film in which metal is laminated (laminated). Reference numerals 11 and 12 denote the main bodies of the capacitors, which will be described in detail with reference to FIG.

Reference numeral 13 denotes a laminate plate, which is made of the same material as the laminate case 10 and is a flat plate. Capacitor body 1 in laminate case 10
After accommodating 1 and 12, the laminate plate 13 is thermocompression-bonded to the end of the laminate case 10 to seal the capacitor. The electrodes connected to the main bodies 11, 12 of the capacitors are:
As shown in FIG. 1, the electrodes are taken out from symmetrical directions to prevent contact between the electrodes.

FIG. 3 is a diagram for explaining the structure of the capacitor body according to the present embodiment. FIG. 3A shows a configuration in which a terminal 15 is welded to an anode foil 14 manufactured by chemical conversion of an insulator. FIG. 3B shows the electrolytic paper 16 in which the electrolytic solution is sealed, which is provided to maintain the electrical connection between the anode and the cathode. FIG. 3C shows the cathode foil 17, which is thinner and more flexible than the anode foil 14 shown in FIG. 3A. The terminal 18 is also attached to the cathode foil 17 by welding in the same manner as the anode foil 14.

Then, the components described above are laminated as shown in FIG. 4 to form a capacitor. That is, the electrolytic paper 1
6, a cathode foil 17 and an electrolytic paper 16 are laminated and wound so as to enclose the anode foil 14 so as to cover both sides, and another anode foil 14 is further laminated, and then the electrolytic paper 1
6, a capacitor is formed by stacking three sheets of cathode foil 17 and electrolytic paper 16.

The anode foil 14 forms one capacitor by overlapping and welding the terminals attached to each foil.
This capacitor is impregnated with an electrolytic solution. The electrolytic solution is a conductor and plays a role of electrically connecting a dielectric formed on the surface of the anode foil 14 and the cathode foil 17.

According to the capacitor constructed as described above and assembled as shown in FIG. 2, a plurality of sheet-shaped capacitors are housed in one package, so that the thickness direction can be made extremely thin. As shown in FIG. 8, compared with a case where a plurality of cylindrical capacitors are arranged, a wasteful volume can be greatly reduced. This makes it possible to use the space inside the camera effectively, which greatly contributes to downsizing of the camera.

In the above description, the case where the number of single capacitors is two has been described. However, the present invention is not limited to this, and any number of capacitors may be used.

In this embodiment, the GND terminal is provided for each capacitor. However, since the GND terminal is electrically connected by the electrolytic solution, there is no problem even if the GND terminal comes out from only one capacitor. Further, in the above description, the cathode foil and the electrolytic paper are folded, and the description is made in the form of mounting with the anode foil sandwiched therebetween, but each element is simply stacked,
A capacitor may be formed by electrically connecting the cathode foil and the anode foil, respectively.

(Second Embodiment) FIGS. 5A to 5D show
It is a figure which shows the sheet-shaped capacitor in 2nd Embodiment of this invention by a development view. 5 (A) and 21 of FIG. 5 (D) are a pair of laminate cases constituting the exterior of the capacitor, each having a box-shaped recess at the center, and FIG. B) Capacitor 2
2. The capacitor 24 shown in FIG. 5C can be stored.

The capacitor 22 has a terminal 23 and the capacitor 24 has a terminal 25. The lead-out positions of the terminals 23 and 25 are configured to be located at the ends in the thickness direction of the capacitor.

When the capacitors 22 and 24 are mounted on the laminate cases 20 and 21, the terminals 23 and 25 of the capacitors 22 and 24 are so positioned that the terminals 23 and 25 of the capacitors 22 and 24 are close to the crimp surfaces of the laminate cases 20 and 21.
The laminate cases 20 and 21 are bonded by thermocompression bonding.

According to the capacitors mounted in this way, since the terminals of each capacitor are drawn out to the outside in a straight state, it is possible to provide a capacitor in which no load is applied to the terminals. . Further, since the terminals of the two capacitors are drawn in different directions, the terminals can be taken out without passing through the end surface of the other capacitor, so that there is no danger that the capacitors will come into contact with each other.

(Third Embodiment) FIG. 6 shows a connection diagram of capacitors according to a third embodiment of the present invention. 26 is a capacitor body, and 27 is a cathode of the capacitor, which is connected to a cathode foil (not shown). This cathode 27 also serves as the cathode of the two capacitors. 28 is an anode of the first capacitor. This anode 28 is connected to anode foils 30 and 31. The surfaces of the anode foils 30 and 31 are insulators (dielectrics)
Therefore, the anode 28 is electrically connected to the conductor inside the insulator by welding. Anode foil 3
The number of 0 and 31 is not limited to two, but may be any number depending on the capacity of the capacitor.

An anode 29 of the second capacitor has the same structure as the anode 28 of the first capacitor, and is connected to anode foils 32 and 33. Reference numerals 34 and 35 denote electrolytic paper, which is disposed between the anode and the cathode, soaks the electrolytic solution, and electrically connects the inside of the capacitor.

FIG. 7 is an overall configuration diagram of a capacitor according to a third embodiment of the present invention. A plurality of integrated capacitors (capacitor 1 and capacitor 2) are sealed inside the capacitor 26. The cathode 27 is arranged at the center of one side of the rectangular capacitor, and the anode 2 is
8, 29 are arranged symmetrically. As the anode foil, the two capacitors shown in FIG. 3A are used. If the terminals of the capacitor 1 are assembled so that the terminals of the capacitor 1 are on the right side, the terminals of the capacitor 2 are turned over and the terminals of the capacitor 2 are assembled facing left. The same cathode foil (including the terminal) can be used.

As described above, in the capacitor of the third embodiment, the size of the capacitor can be reduced by commonly using the cathode foil. In addition, since a plurality of capacitors are formed using a single cathode foil, the number of connections to external circuits is reduced due to a single cathode terminal. In addition, the number of parts can be reduced by assembling the anode foil of the same shape on the two capacitors so as to be symmetrical.

As described above, in the capacitor according to the embodiment of the present invention, a plurality of flat capacitors can be contained in one package to provide a capacitor with high volume efficiency. In addition, by configuring a plurality of capacitors with one cathode foil, it is possible to reduce the number of electrode terminals. In addition, when taking out the electrodes of multiple capacitors from the same direction, it is possible to use a single anode foil by allocating the anode to the left and right with the cathode terminal as the center, and it is possible to reduce the number of parts. I can do it.

The invention having the following configuration can be extracted from the above-described specific embodiment.

[Appendix 1] In a flat capacitor formed by laminating a cathode foil, electrolytic paper and an anode foil, a first flat capacitor including a first electrode portion,
Wherein the second flat capacitor including the electrode portion is housed in the same package.

[Appendix 2] The flat capacitor according to Appendix 1, wherein the cathode foil of the first flat capacitor and the cathode foil of the second flat capacitor are formed in common. .

[Supplementary Note 3] The first electrode portion includes a first cathode terminal and a first anode terminal, and the second electrode portion includes a second cathode terminal and a second anode terminal. The flat capacitor according to claim 1, wherein the first anode terminal and the second anode terminal are sandwiched between the first cathode terminal and the second cathode terminal, respectively.

[0032]

According to the present invention, a plurality of capacitors can be connected to one capacitor.
Since the capacitors are housed in one package, it is possible to provide a volume-efficient flat capacitor.

Further, since a plurality of capacitors are formed by one common cathode foil, it is possible to provide a further downsized flat capacitor.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a capacitor according to a first embodiment of the present invention.

FIG. 2 is a diagram showing the inside of the capacitor described in FIG. 1 in an easily understandable manner.

FIG. 3 is a diagram illustrating a structure of a capacitor body.

FIG. 4 is an external perspective view of a capacitor formed by the method of the embodiment.

FIG. 5 is a view showing, in a developed view, a sheet-like capacitor in a second embodiment of the present invention.

FIG. 6 is a connection diagram of a capacitor according to a third embodiment of the present invention.

FIG. 7 is an overall configuration diagram of a capacitor according to a third embodiment of the present invention.

FIG. 8 is a diagram for explaining a problem of a conventional main capacitor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2a Anode (terminal of capacitor 1) 2b Cathode (terminal of capacitor 1) 3a Anode (terminal of capacitor 2) 3b Cathode (terminal of capacitor 2) 10 Laminate case 11 Main body 12 Main body 13 Laminated plate 14 Anode foil 15 Terminal 16 Electrolytic paper 17 Cathode foil 18 Terminal 20 Laminate case 21 Laminate case 22 Capacitor 23 Terminal 24 Capacitor 25 Terminal 26 Capacitor body 27 Cathode 28 Anode of first capacitor 29 Anode of second capacitor 30-33 Anode foil 34 Electrolytic paper 35 Electrolysis paper

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01G 9/14 H01G 4/38 A 9/04 328

Claims (3)

[Claims] A flat capacitor formed by laminating a cathode foil, electrolytic paper and an anode foil, wherein a first flat capacitor including a first electrode portion and a second flat capacitor including a second electrode portion are provided. Wherein the flat capacitor is housed in the same package. 2. The flat capacitor according to claim 1, wherein the first electrode portion and the second electrode portion are led out from different end faces of the package. 3. The flat capacitor according to claim 1, wherein the first electrode portion and the second electrode portion are led out from a vicinity of a joint surface of the package.