JPH11288855A - Capacitor bank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a capacitor bank, capable of solidly and seadily fixing a capacitor. SOLUTION: In a capacitor bank, which fixes a plurality of electrolytic capacitors by a fixing band, the fixing band 27 is formed of a quadrangle-shaped frame part 27a and a leg part 27b, which extends from this frame part 27a. In the leg part 27b, a screw hole 27c for attaching a substrate is provided. In the frame part 27a, a plurality of the electrolytic capacitors comprising the quadrangle-shaped-element containing parts and the cylindrical sealing parts are arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitor bank in which electrolytic capacitors are arranged and fixed.

[0002]

2. Description of the Related Art Electrolytic capacitors are widely used in AV equipment and industrial equipment for power supply smoothing and coupling. As an example, a JIS standard CE33 type aluminum electrolytic capacitor has a capacitor element 3 housed in a bottomed cylindrical aluminum outer case 2 as shown in FIG. Are sealed by a sealing body 4. The capacitor element 3 is formed by winding an anode foil and a cathode foil, which have been etched and formed, through a separator, fixing them with a tape 5, and impregnating with an electrolytic solution. A fixing material 6 is filled between the capacitor element 3 and the outer case 2 for the purpose of fixing the capacitor element 3.

[0003]

In a capacitor bank in which a conventional electrolytic capacitor 1 is laid out on a substrate using a product fixing band 7, many dead spaces are generated as shown in FIG. To solve this,
A method of forming the outer case into a rectangular parallelepiped suitable for close contact assembly as shown in FIG. 6 is conceivable. It was very difficult.

[0004]

According to the present invention, in a capacitor bank for fixing a plurality of electrolytic capacitors by means of a fixing band, the fixing band 27 has a rectangular frame portion 27a.
And a leg 27b extending from the frame 27a. The leg 27b is provided with a screw hole 27c for mounting a substrate, and a rectangular element storage portion (B) is provided in the frame 27a.
(A) and a plurality of electrolytic capacitors each including a cylindrical sealing portion (A).

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A capacitor bank fixing band for fixing a plurality of electrolytic capacitors comprises a rectangular frame portion and legs extending from the frame portion, and the leg portion has a screw for mounting a substrate. Holes are provided, and a plurality of electrolytic capacitors using a case including a square element housing part (part B) and a cylindrical sealing part (part A) are arranged in the frame.

[0006] By using the above case, a capacitor bank having a better layout can be obtained than when a cylindrical electrolytic capacitor according to the prior art is used. In addition, the electrolytic capacitor using the above case has a large space volume inside the outer case, so when the internal pressure of the case rises due to hydrogen gas generated during charge / discharge use, etc., it operates when the specified pressure is reached. The operation time of the valve 28 is extended, and there is an effect that the life of the product is prolonged.

[0007]

FIG. 1 shows an embodiment of a capacitor bank according to the present invention. The electrolytic capacitor 21 of the JIS standard 33 type shown in FIG. The capacitor element 23 is housed, and the opening is sealed by a sealing body 24. The capacitor element 23 is formed by winding an etched and formed anode foil and a cathode foil via a separator, fixing them with a tape 25, and impregnating with an electrolytic solution. A fixing material 26 is filled between the capacitor element 23 and the outer case 22 for the purpose of fixing the capacitor element 23. When the six electrolytic capacitors 21 are put together, fixed with the product fixing band 27 and laid out on the board, the capacitor bank shown in FIG. 1 is formed. Table 1 shows a comparison between the capacitor bank according to the above embodiment and that according to the conventional example.

[0008]

[Table 1]

As described above, by fixing the rectangular capacitor with the rectangular fixing band, it is possible to firmly fix the capacitor, and it is possible to reduce the dead space by reducing the space occupied by the legs as in the conventional example. In addition, the size of the capacitor bank can be reduced. Further, since the number of fixing points of the leg portions and the number of mounting points of the leg portions can be reduced, the number of steps required for fixing can be reduced. Further, since the space volume inside the capacitor case can be widened, the internal pressure rise is reduced, the operation time of the explosion-proof valve is extended, and the product has a long life.

[0010]

According to the capacitor bank of the present invention, since the shape of the frame portion of the fixed band is square and the square electrolytic capacitor is fixed, the layout is excellent and the capacitor can be fixed firmly and easily. It is possible to reduce the size and to easily attach it to a substrate. In addition, the capacitor used can be manufactured easily and inexpensively with the same sealing technology as the conventional technology, and the space volume inside the outer case can be larger than that of the cylindrical electrolytic capacitor according to the conventional technology. When the internal pressure of the case rises due to the generated hydrogen gas, the operation time of the explosion-proof valve 28 that operates when the pressure reaches the specified pressure is extended, and there is also an effect of extending the life of the product. It should be noted that, in addition to the JIS type 33 shown in the examples, the types of electrolytic capacitors to which the present invention can be used include:
It can be used for a case having a bottomed cylindrical shape in an outer case such as a shape and a shape 04.

[Brief description of the drawings]

FIG. 1 is an external view of a capacitor bank according to the present invention.
(A) Plan view, (b) Front view, (c) Side view.

FIG. 2 is a partial cross-sectional perspective view of an electrolytic capacitor used for the capacitor bank of the present invention.

3A is a plan view of an electrolytic capacitor used in the capacitor bank of the present invention, FIG. 3B is a cross-sectional view taken along line aa ′ of FIG. 3A, and FIG. 3C is a cross-sectional view taken along line bb ′ of FIG. FIG.

FIG. 4 is a plan view of an embodiment of a conventional capacitor bank.

FIG. 5A shows a conventional electrolytic capacitor used in FIG.
It is a top view, (b) sectional drawing.

FIG. 6 is a plan view of another embodiment of the conventional capacitor bank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrolytic capacitor 2 Exterior case 3 Capacitor element 4 Sealing body 5 Tape 6 Fixing material 7 Product fixing band 8 Explosion-proof valve 21 Electrolytic capacitor 22 Exterior case 23 Capacitor element 24 Sealing body 25 Tape 26 Fixing material 27 Product fixing band 27a Frame 27b Leg Part 27c Screw hole 28 Explosion-proof valve 29 Terminal connection plate

Claims (1)

[Claims] In a capacitor bank for fixing a plurality of electrolytic capacitors by means of a fixed band, a fixed band (27) includes a rectangular frame (27a) and a frame (27a).
and a leg (27b) extending from (a). The leg (27b) is provided with a screw hole (27c) for mounting a substrate, and a rectangular element housing is provided in the frame (27a). A capacitor bank comprising a plurality of electrolytic capacitors each including a part (part B) and a cylindrical sealing part (part A).