JP2009253009A - Capacitor module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a capacitor module which is strong against impact by reinforcing not only fixation by contact support between an interior surface of a holder and a side surface of the holder in the capacitor module but capacitor fixation. <P>SOLUTION: In the capacitor module, a semicircle cylinder-like pinching parts 4d is provided in a lower holder 4b facing surface of an upper holder 4a. An "H"-shaped slit hole 6 is provided perpendicular to the longitudinal direction of the pinching part 4d and along an outside surface of the pinching part 4d on the outside surface of the pinching part 4d. When the capacitor 3 is pinched by the holder 4, the pressure bonding part 8 is pressure-bonded to the outside surface of the accommodated capacitor 3 by warpage from the top surface of the holder 4 of the pressure bonding part 7 toward the bottom caused by providing a slit hole 6. The configuration reinforces the fixation for pinching the capacitor 3 by the holder 4 more reliably. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power supply backup unit that compensates for an instantaneous voltage drop of a power supply caused by a battery of a vehicle-mounted device or the like by using discharge of a capacitor.

  In recent years, hybrid cars and electric cars have been rapidly developed. For example, in a vehicle in which an idling stop is adopted, the battery voltage drops sharply when the engine is restarted, so that it is installed in the car. There was a problem that the equipment might stop once.

  Therefore, it has been proposed that a plurality of large-capacitance capacitors be mounted in addition to the battery to play a role of supplying power to equipment mounted in the vehicle instead of the battery.

  As one of the proposals, a capacitor module is disclosed in which a plurality of capacitors are accommodated in a case in a state where they are laid down horizontally to reduce the height.

As a prior art document relating to this application, for example, Patent Document 1 is known.
JP 2007-123400 A

  However, in the conventional capacitor module, when assembling the capacitor module in a state where a plurality of capacitors are horizontally tilted to reduce the height, a plurality of external connection terminals drawn out from the capacitor are exposed to the outside of the holder. The capacitor was sandwiched from above and below by the upper holder and the lower holder. With this configuration, the capacitor is fixed in the holder only by contact support between the inner surface of the holder and the outer peripheral surface of the capacitor when the upper holder and the lower holder are joined.

  In addition, when the fixing in the horizontal direction is performed, particularly when a member for fixing the sealing surface side of the capacitor is provided on the holder, the end portion of the capacitor plane swells during the sealing process, and the holding portion of the holder Therefore, since only the swelled portion is exposed, the shape near the opening of the through hole is complicated, and it is difficult to provide a fixing member.

  For this reason, there has been a problem that the conventional method of holding a capacitor with a holder has low resistance to vibration and impact.

  Accordingly, an object of the present invention is to overcome the above-described problems and provide a capacitor module in which a capacitor is more firmly fixed by a holder.

  In order to solve this problem, the present invention provides a capacitor module in which a plurality of capacitors sandwiched from above and below by an upper holder and a lower holder are connected to a control unit via external connection terminals and are accommodated in an outer case together with the control unit. The upper holder and the lower holder are each provided with a semi-cylindrical holding portion for holding a plurality of capacitors, and at least three sides are formed in a part of the holding portion of the upper holder. And the central side of the three slit holes is arranged in parallel with the longitudinal direction of the capacitor.

  By adopting such a configuration, the capacitor module according to the present invention is formed in a tongue-like shape by surrounding the three sides by the three-side slit holes having a “U” shape provided in the holding portion of the upper holder. The crimping portion is bent or warped from the upper surface of the upper holder toward the lower holder. And a part of crimping | compression-bonding part becomes the structure protruded in the semi-cylinder of the clamping part of an upper holder.

  Therefore, when a plurality of capacitors are clamped by the upper holder and the lower holder, the crimping part that partially protrudes into the semicylinder of the clamping part is caused by the outer surface of the capacitor that is in contact with the clamping part. Extruded from within. Then, a repulsive force acts on the crimped portion that is bent with respect to the force that is pushed out, so that the crimped portion is crimped to the outer peripheral surface of the capacitor.

  By this crimping of the crimping portion, it is possible to fix the capacitor more firmly than the fixing of the capacitor only by clamping from above and below using the upper holder and the lower holder.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment)
FIG. 1A is a perspective view of a capacitor module in which a member is accommodated in an exterior case 1 in the present embodiment, and FIG. 1B is an internal view of the capacitor module in which the upper lid 1a is removed from the capacitor module. It is the perspective view of the capacitor module which showed the structure of this member.

  In FIG. 1A, reference numeral 1 denotes a resin exterior case. The exterior case 1 is configured to seal the housed internal member by joining the upper lid 1a and the lower lid 1b with screws 2. In addition, a connector 1c is provided on the side of the outer case 1 to make electrical connection with an external device (not shown).

  In FIG. 1B, a plurality of capacitors 3 and a holder 4 for horizontally holding and fixing the capacitors 3 on the lower lid 1 b of the exterior case, and a wiring board 5 as a control unit adjacent to the holder 4 are provided.

  The capacitor 3 plays a role of charging / discharging by exchanging electric power with the outside. An external connection terminal 3 a is exposed from the capacitor 3 to be electrically connected to the wiring board 5.

  The capacitor 3 used in the present embodiment is cylindrical from the shape of the internal capacitor element, but may be rectangular.

  The holder 4 is made of resin and includes an upper holder 4a and a lower holder 4b. A plurality of capacitors 3 are sandwiched and fixed from above and below by the opposed upper holder 4a and lower holder 4b. The holder 4 and the outer case 1 are fixed by providing screw holes at predetermined locations of the holder 4 and the outer case 1 and fixing with the screws 2.

  The wiring board 5 plays a role of controlling charging / discharging of the plurality of capacitors 3 incorporated in the capacitor module, and a plurality of electronic components forming an electric circuit are mounted on the wiring board 5.

  FIG. 2 is a perspective view of the holder 4 alone when the capacitor 3 is not clamped and fixed in the present embodiment.

  FIG. 3A is a perspective view from the upper surface of the upper holder 4a, and FIG. 3B is a perspective view from the bottom surface of the upper holder 4b.

  4A is a perspective view from the upper surface of the lower holder 4b, and FIG. 4B is a perspective view from the bottom surface of the holder 4b.

  2, the side surface of the holder 4 has a configuration in which a plurality of cylindrical portions 4c provided in parallel in the horizontal direction are provided. 3B and 4A, the upper holder 4a and the lower holder 4b are placed on the surfaces where the upper holder 4a and the lower holder 4b face each other. When the upper holder 4a and the lower holder 4b are opposed to each other and joined as the holder 4, the semi-cylindrical sandwiching portions 4d and 4e provided in the horizontal direction are integrated into the horizontal direction to the side of the holder 4. The cylindrical part 4c provided in is formed.

  3A and 3B, the upper surface of the upper holder 4a has a plurality of semi-cylindrical clamping portions 4d that are horizontally provided on the opposing surfaces of the lower holder 4b of the upper holder 4a. Thus, a wavy uneven surface is formed by the outer surfaces of the plurality of sandwiching portions 4d, and the beam portions 4f are provided vertically and horizontally according to the outer shape of the upper holder 4a.

  Moreover, the slit hole 6 is provided for every clamping part 4d on the outer surface of the several clamping part 4d of the upper holder 4a. The shape of the slit hole 6 is an “H” shape, and a configuration in which a letter “H” is drawn in a direction perpendicular to the longitudinal direction of the sandwiching portion 4 d and along the curved surface of the outer surface of the sandwiching portion 4 d. It is.

  The letter “H” is a shape in which two “U” letters sharing the center side are arranged on the left and right.

  By providing this slit hole 6, at the time of injection formation of this holder 4, two tongues surrounded by the slit hole 6 around the “H” character on the outer surface of the resin sandwiching portion 4d as a boundary. The piece-like crimping portion 7 is bent or warped from the upper holder 4a toward the lower holder 4b. Due to this warping, a part of the crimping part 7 protrudes partly on the inner surface of the clamping part 4d provided on the lower holder facing surface of the upper holder 4a.

  Incidentally, the outer surface of the sandwiching portion 4d refers to one curved surface among the wavy uneven surfaces formed on the upper surface portion of the upper holder 4a in the sandwiching portion 4d. In addition, the inner surface of the sandwiching portion 4d refers to a curved surface that contacts the outer peripheral surface of the capacitor 3 when the holder 4 sandwiches the capacitor 3 in the sandwiching portion 4d.

  And the crimping | compression-bonding part 7 which curved in the direction which goes to the lower holder 4b from the upper holder 4a can correct curvature by applying a fixed force. However, when correction is applied, a repulsive force in the direction from the upper holder 4a to the lower holder 4b is generated in the pressure-bonding portion 7 in order to return to the natural state when the warp of the pressure-bonding portion 7 is corrected.

  By using the mechanism in which the repulsive force acts, when the capacitor 3 is clamped by the holder 4, the outer surface of the clamped capacitor 3 is brought into contact with the inner surface of the upper holder 4a, so that the crimping protrudes into the cylindrical portion 4c. The part 7 is extruded from the inside of the cylindrical part 4c or crushed. And with respect to the force to be pushed out, the pressure-bonding portion 7 is a state in which a part of the pressure-bonding portion 7 originally protrudes into the cylindrical portion 4c is a natural state. The crimping portion 7 can be crimped to the outer peripheral surface of the capacitor 3.

  By crimping the crimping portion 7 to the outer surface of the capacitor 3, the capacitor 3 can be more firmly fixed by the holder 4 than the capacitor holding means in the conventional capacitor module.

  In addition, with regard to the degree of warping in resin processing, the effect of high warping can be obtained only by providing a crimped portion 7 that is in the form of a tongue piece on the curved surface or the outer surface of the clamping portion 4d that forms an arch due to the physical properties of the resin. Can do.

  The arrangement shape of the slit hole 6 is not limited to the letter “H”. For example, as described above, the letter “H” can also be regarded as a shape that combines the upper and lower symmetrical “ko” letters, and each of these “ko” letters is separated or independent. The slit hole 6 may be provided so that the opening portion is provided in a direction perpendicular to the central axis of the cylindrical portion 4c. Further, the shape is not limited to a square shape such as “H” or “U”, but may be a shape using a curve such as “C”.

  3 and 4, in the present embodiment, the hole diameter of the cylindrical portion 4c provided in the horizontal direction to the holder 4 is slightly smaller than the diameter of the circumference on the outer peripheral surface of the capacitor 3 that is actually sandwiched.

  With this configuration, when the upper holder 4a and the lower holder 4b are joined, screws are formed on the left and right side surfaces of the holder 3 in the longitudinal direction of the capacitor 3 so that a gap is not generated as much as possible between the upper holder 4a and the lower holder 4b. 2 and the fitting using the snap fits 8 provided on the left and right side surfaces of the upper holder 4a in the longitudinal direction of the capacitor 3 as shown in FIG. The fixing strength of the plurality of capacitors 3 held by the holder 4 can be increased as compared with a configuration in which the diameter is the same and the capacitor 3 is in contact with the inner surface of the holding portion 4d.

  However, with this configuration alone, the upper holder 4a and the lower holder 4b in the vicinity of the place where the holder 4 is crimped by the screw 2 or fitted by the snap fit 8 are extremely close to each other. The center portion of the opposing surface warps in the direction from the lower holder 4b toward the upper holder 4a and rises, and the effect of this configuration is diminished in the capacitor 3 disposed in the central portion of the lower holder 4b facing surface of the upper holder 4a. .

  Therefore, with respect to the floating of the central portion with respect to the longitudinal direction of the upper holder 4a, as shown in FIG. 3 (b), a fitting insertion portion 9 for fitting and fixing is provided at the central portion on the surface facing the lower holder 4b of the upper holder 4a. As shown in FIG. 4A, the fitting part hole 10 is provided at a position corresponding to the place where the fitting insertion part 9 is disposed on the surface of the lower holder 4b facing the upper holder 4a.

  By providing the fitting insertion portion 9 and the fitting portion hole 10 at the center portion in the longitudinal direction of the holder 4, it is possible to suppress the lifting at the center portion in the longitudinal direction of the holder 4.

  In addition, about the arrangement | positioning location of the insertion part 9 and the hole 10 for insertion parts, it provides in a center part on the surface where the upper holder 4a and the lower holder 4b oppose, but the capacitor clamped by the holder 4 is provided. When the quantity and the shape and size of the capacitor are not unified, there is a possibility that the insertion portion 9 and the insertion portion hole 10 cannot be provided at the center position. In that case, it is preferable to provide the insertion portion 9 and the insertion portion hole 10 at a position as close to the center position as possible.

  4A, in the present embodiment, the wall plate 11 is provided at the opening end of the cylindrical portion 4c on the side of the bottom surface of the capacitor 3 on the side surface of the lower holder 4b. Thereby, when the capacitor 3 is clamped in the holder 4, it becomes a deterrent of the movement of the capacitor 3 against vibration. However, the wall plate 11 is not in close contact with the bottom surface of the capacitor 3 and has a predetermined gap. This is because when the pressure inside the capacitor 3 suddenly rises and bursts on the bottom surface of the capacitor 3, it bursts from the external connection terminal 3 a side, and the electrolytic solution contained in the capacitor 3 scatters, and the scattered electrolytic solution becomes a wiring board. Explosion-proof valves are prepared that are used to prevent the occurrence of short circuits due to adhesion on the top surface. Then, by providing a gap between the bottom surface of the capacitor 3 and the wall plate 11, the gap becomes a margin when the explosion-proof valve is activated and the bottom surface of the capacitor 3 is expanded, and the explosion-proof valve is safely operated by preventing the electrolyte from being scattered. It becomes possible to make it.

  In the embodiment of the present invention, the cylindrical capacitor 3 is used, but a configuration in which a concave portion is provided in the crimping portion 7 on the side peripheral surface of the cylindrical capacitor 3 may be used.

  With this configuration, the protruding crimping portion 7 is fitted into the recess provided on the side surface of the capacitor 3, and further firm fixation is possible.

  3A and 4B, in the present embodiment, the bottom surface of the lower holder 4b is also connected to a plurality of semi-cylindrical clamping portions 4e in parallel with the upper holder 4a, so that the outside of the clamping portion 4e is removed. Wave-shaped irregularities are formed by a plurality of curved surfaces on the side surface. At the same time, the beam portion 4f is provided vertically and horizontally in accordance with the outer shape of the lower holder 4b.

  As described above, in the capacitor module according to the embodiment of the present invention, the upper surface portion of the upper holder 4a constituting the holder 4 provided with a plurality of cylindrical portions 4c in the horizontal direction has a plurality of curved surfaces arranged in parallel. The part 4f has a shape provided vertically and horizontally. And it was set as the structure which provided the slit hole 6 of the shape of "H" on the some curved surface provided in the upper holder 4a in the orthogonal | vertical direction with respect to the cylindrical part 4c center axis | shaft, respectively.

  As a result, the crimping part 7 surrounded by three directions with the “H” -shaped slit hole 6 as a boundary is directed to the inside of the holder 4 from the physical properties of the resin constituting the holder 4 by performing the process of providing the crimping part 7. Cause warping. Due to this warping, a part of the crimping part 7 protrudes from the inner surface of the clamping part 4d of the upper holder. Due to this warping of the crimping portion 7, when the capacitor 3 is clamped by the holder 4, the crimping portion 7, part of which protrudes from the inner peripheral surface of the clamping portion 4 d, is pushed outward by the capacitor 3, thereby 7 is pressure-bonded to the peripheral surface of the capacitor 3 due to the elastic force caused by warping.

  The crimping of the crimping part 7 makes it possible to clamp and fix the capacitor 3 more firmly than before, and the reliability of the capacitor module is improved.

  In particular, the present invention has excellent mechanical strength against vibration and impact due to the firm fixation of the capacitor by the crimping portion, and therefore, portable electronic devices that need resistance to vibration and impact from multiple directions in use. It is expected to be used as a backup power source for equipment and as a backup and regenerative power source for hybrid vehicles.

(A) The perspective view which showed the capacitor module in embodiment of this invention, (b) The perspective view which showed the capacitor module which removed the holder same as the above The perspective view which showed the holder in embodiment of this invention (A) The perspective view which showed the upper holder upper surface side in embodiment of this invention, (b) The perspective view which showed the same bottom face side (A) The perspective view which showed the lower holder upper surface side in embodiment of this invention, (b) The perspective view which showed the same bottom face side

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer case 1a Outer case upper cover 1b Outer case lower cover 1c Connector 2 Screw 3 Capacitor 3a External connection terminal 4 Holder 4a Upper holder 4b Lower holder 4c Cylindrical part 4d, 4e Holding part 4f Beam part 5 Wiring board 6 Slit hole 7 Crimp part 8 Snap fit 9 Insertion part 10 Insertion hole 11 Wall plate

Claims (3)

A plurality of capacitors having external connection terminals;
An upper holder and a lower holder for horizontally holding the plurality of capacitors from above and below;
A control unit for controlling charging and discharging of the plurality of capacitors;
In the capacitor module consisting of a plurality of capacitors sandwiched between the upper holder and the lower holder and an outer case containing the control unit,
Each of the upper holder and the lower holder is provided with a semi-cylindrical holding portion for holding the plurality of capacitors, and a “U” -shaped slit hole having three sides connected to a part of the holding portion of the upper holder. At least one is provided, and the central side of the slit holes on the three sides is arranged in parallel with the longitudinal direction of the capacitor held by the holding part,
Capacitor module. The inner diameter of the cylindrical portion formed by facing the semicylindrical clamping portions provided in the upper holder and the lower holder, respectively, is smaller than the outer diameter of the capacitor held by the clamping portion. 2. The capacitor module according to 1. On the two opposing surfaces of the upper holder and the lower holder, a fitting insertion portion for fitting and fixing is provided at a substantially central position on one surface, and the fitting insertion portion is provided at a substantially central position on the other surface. The capacitor module according to claim 2, wherein the capacitor module is fitted into the part hole.

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