JP2016027670A - Capacitor module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a capacitor module that can prevent breakage of a solder portion of a lead wire caused by vibration of a vehicle or the like and enhance vibration resistance, and is excellent in assembly workability.SOLUTION: A capacitor body 12 is mounted to be horizontally laid in a lower holder 32, and pressed by an upper holder 34. The capacitor body 12 is provided with a leg portion 24 by making a lead wire 21 of the capacitor body 12 protrude in the axial direction, folding the lead wire 21 to a wiring board 300, and then soldering the lead wire 21 to the wiring board 300 by solder. The lower holder 32 is provided with a first pinch portion 36 having a support portion 102 which is fixedly provided to protrude outwards, and the upper holder 34 is provided with a second pinch portion 38 having a bridge portion 204 which is bridged between a pair of elastically deformable arms 202 so as to protrude outwards. The first and second pinch portions 36, 38 are urged to the capacitor body 12 side to pinch a part of the leg portion 24 of the lead wire 21 in the axial direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a capacitor module in which a capacitor is attached to a wiring board.

  In recent years, vehicles such as electric vehicles and hybrid vehicles have been put on the market in order to consider the environment and improve fuel efficiency. Such a vehicle consumes a large current intermittently when the starter is driven during use, so that the voltage of the battery temporarily decreases. As a result, the supply voltage to other loads such as audio, car navigation, and the electronic control unit of the vehicle control system also decreases, and the operation may become unstable.

  On the other hand, a capacitor module using a capacitor is known as an auxiliary power source for supplying sufficient power to a load when the voltage of the battery temporarily drops.

  FIG. 11 is an upper perspective view showing clamping of the holder of the conventional capacitor module.

  In the conventional capacitor module, a plurality of capacitors 503 are sandwiched between a lower holder 501 and an upper holder 502 in the vertical direction. The body portion of the capacitor 503 is held by the storage portion of the lower holder 501, and the body portion of the capacitor 503 is pressed from above by the crimping portion of the storage portion of the upper holder 502.

  The lead wire 504 of the capacitor 503 is pulled out from the side surfaces of the lower holder 501 and the upper holder 502 and bent into an L shape, and the end portion of the lead wire 504 is soldered to the wiring board 505.

  In addition, as prior art document information relevant to the invention of this application, for example, what is shown in Patent Document 1 is known.

JP 2009-253009 A

  However, in such a conventional capacitor module, a gap is provided between the body of the capacitor, the lower holder, and the storage portion of the upper holder so that the capacitor can be easily stored in the lower holder and the upper holder during assembly. Due to such a gap, the body of the capacitor vibrates due to the vibration of the vehicle, and there is a problem that the lead wire near the soldered portion of the lead wire is broken or the soldered portion is damaged.

  An object of the present invention is to solve such a conventional problem and to provide a capacitor module that is excellent in assembling workability and can improve vibration resistance.

In order to achieve the above object, the present invention provides a capacitor having a capacitor main body and a lead wire protruding in an axial direction from one end of the capacitor main body, a lower holder for horizontally storing the capacitor main body, and the capacitor main body horizontally. In the capacitor module, comprising: an upper holder to be pressed; and a wiring board in which the lower holder is fixed to the board surface, wherein the lead wire is bent toward the board surface and connected to the wiring board. The lower holder and the upper holder are provided with a first holding portion and a second holding portion, respectively, and the second holding portion urges the leg portion of the lead wire toward the capacitor main body, The second clamping part is a capacitor module that clamps a part of the leg part of the lead wire in the axial direction.

  As described above, according to the present invention, the first and second holding portions urge the lead wire legs toward the capacitor main body and hold a part of the legs in the axial direction. This suppresses the vibration of the legs of the lead wire, prevents damage near the soldered portion of the lead wire, improves vibration resistance, and has the effect of suppressing damage to the capacitor during assembly while ensuring good assembly workability. is there.

The upper perspective view which shows clamping by the holder of the capacitor module in Embodiment 1 of this invention 1 is an exploded perspective view of a capacitor module according to Embodiment 1 of the present invention. AA side sectional view showing clamping of the lead wire of the capacitor module in FIG. The upper perspective view which shows the state which accommodated the capacitor in the lower holder in Embodiment 1 of this invention The upper perspective view of the lower holder in Embodiment 1 of the present invention The lower perspective view of the lower holder in Embodiment 1 of this invention The upper perspective view of the upper holder in Embodiment 1 of the present invention The lower perspective view of the upper holder in Embodiment 1 of the present invention The perspective view of the capacitor which bent the lead wire in Embodiment 1 of this invention Side surface sectional drawing which shows clamping of the lead wire in Embodiment 2 of this invention Upper perspective view showing clamping of a holder of a conventional capacitor module

(Embodiment 1)
A capacitor module according to Embodiment 1 of the present invention will be described.

  FIG. 1 is an upper perspective view showing clamping of a capacitor module by a holder according to Embodiment 1 of the present invention, and FIG. 2 is an exploded perspective view of the capacitor module.

  As shown in FIG. 2, the capacitor module 10 includes a plurality of capacitors electrically connected in an insulating resin outer case 400, 402, and stores the power of the external power source in the plurality of capacitors 11 via the connector 304. The stored electric power is supplied from the connector 304 to an external load or the like. The wiring board 300 includes a control circuit that controls charging / discharging of the plurality of capacitors 11. A single capacitor 11 may be used.

  As the capacitor 11, an electric double layer capacitor, an electrolytic capacitor, an electrochemical capacitor, or the like can be used.

  In the first embodiment, as shown in FIG. 1, the capacitor module 10 is configured such that six electric double layer capacitors are arranged in parallel and electrically connected in series by the wiring of the wiring board 300.

  FIG. 9 is a perspective view of the capacitor with the lead wire bent in accordance with the first exemplary embodiment of the present invention.

  As shown in FIG. 9, a pair of round lead wires 21 protrude in the axial direction from one end of the capacitor body 12. Here, the longitudinal direction of the capacitor body 12 was defined as the axial direction.

  The electric double layer capacitor uses a positive electrode and a negative electrode having a foil-like current collector, and the lead wire 21 is joined to the current collector, and the positive electrode and the negative electrode are wound through a separator. It has a capacitor element.

  The capacitor body 12 is sealed with a rubber elastic sealing body 14 by drawing at the open end of the bottomed cylindrical metal case 13, and the capacitor element and the electrolytic solution are stored in the metal case 13. Further, a pair of lead wires 21 are inserted through the through holes of the sealing body 14.

  The lead wire 21 has a protruding portion 22 protruding in the axial direction from the capacitor body 12 and a leg portion 24 bent by a bent portion 23, and is formed in an L shape.

  Other processing may be applied to the lead wire 21 between the projecting portion 22 and the leg portion 24 of the lead wire 21, for example, processing so that the lead wire 21 projects straight and then spreads horizontally in a V shape with respect to the axial direction. Or may be processed to be slightly inclined downward.

  The capacitor body 12 may be a flat shape or a square shape in addition to the cylindrical shape.

  FIG. 3 is a side cross-sectional view taken along the line AA showing the clamping of the lead wires of the capacitor module in FIG.

  As shown in FIG. 3, in the capacitor 11 attached to the capacitor module 10, the protruding portion 22 of the lead wire 21 passes through the circular opening 40 and is led out substantially horizontally, and the leg portion 24 of the lead wire 21 is It is bent toward the substrate surface 302 so as to be substantially perpendicular to the substrate surface 302 and connected to the wiring substrate 300.

  For connection to the wiring board 300, the capacitor 11 provided with the legs 24 with the lead wires 21 bent is prepared, and the capacitor main body 12 is then placed in the first storage part 110 of the lower holder 32 attached to the wiring board 300. The lead wire 21 is inserted into the through hole of the wiring board 300 while being housed, and then the lead wire 21 is soldered to the wiring board 300.

  Next, the lower holder and the upper holder will be described.

  4 is an upper perspective view showing a state in which the capacitor is housed in the lower holder according to the first embodiment of the present invention, FIGS. 5 and 6 are an upper perspective view and a lower perspective view of the lower holder, and FIGS. It is an upper perspective view and a lower perspective view of a holder.

  The lower holder 32 and the upper holder 34 are made of an insulating resin, and the constituent parts of the lower holder 32 and the upper holder 34 are integrally formed by resin molding.

  As shown in FIG. 5, the lower holder 32 includes a first storage portion 110 that stores the capacitor body 12 in a horizontal position. As shown in FIG. 8, the upper holder 34 includes a second storage portion 210 provided with a pressing portion 232 that laterally presses the capacitor body 12 by being biased from above.

As shown in FIGS. 5 and 8, the first storage unit 110 and the second storage unit 210 are semi-cylindrical, and a plurality of the first storage unit 110 and the second storage unit 210 are arranged in the axial direction. They are arranged in a perpendicular direction.

  The first storage portion 110 and the second storage portion 210 have U-shaped portions 112 and 212 and side portions 116, 118, 216 and 218. The inner surfaces of the U-shaped portions 112, 212 are formed in a semicircular shape in a cross section perpendicular to the axial direction, and the side portions 116, 118, 216, 218 are provided at both ends of the U-shaped portions 112, 212 perpendicular to the axial direction, The inner surfaces of the side portions 116, 118, 216, and 218 are formed in a semi-annular flat plate.

  When the upper holder 34 and the lower holder 32 are fitted together, a circular opening 40 is formed on the side surface in the axial direction by the semi-annular side portions 116 and 216 as shown in FIG. Similarly, a circular opening is formed on the other side surface in the axial direction by the semicircular annular side portions 118 and 218.

  As shown in FIG. 7, the pressing portion 232 of the second storage portion 210 is provided in a part of the circumferential surface of the U-shaped portion 212 in a circular belt shape, and one or a plurality facing the apex of the U-shaped portion 212 Provided in pairs.

  The reinforcing portions 214 are provided at two locations in the parallel arrangement direction of the capacitor body 12 so as to divide the side portions 216 and 218 into three equal parts, and the pressing portion 232 of the second storage portion 210 is adjacent to the one reinforcing portion 214. Arranged.

  As shown in FIG. 8, the pressing portion 232 has a convex portion 234 protruding inward of the U-shaped portion 212 on the tip side, and is in contact with the capacitor body 12.

  By this pressing portion 232, the first storage portion 110 and the second storage portion 210 sandwich the capacitor body 12 in the vertical direction, and the capacitor body 12 has an axial direction substantially parallel to the substrate surface 302 of the wiring substrate 300. Is retained.

  In order to improve the storage workability of the capacitor body 12 except for the sandwiched portion, a gap is provided between the capacitor body 12, the first storage portion 110, and the second storage portion 210. , 118, 216, 218 and the capacitor body 12 are configured to be larger than the gaps between the U-shaped portions 112, 212 and the capacitor body 12.

  The lower holder 32 is provided with a first clamping part 36, and the upper holder 34 is provided with a second clamping part 38.

  As shown in FIGS. 1 and 3, a part of the leg portion 24 of the pair of lead wires 21 is held in the axial direction by the first holding portion 36 and the second holding portion 38. The abutting part of the first clamping part 36 and the abutting part of the second clamping part 38 are provided at the same position so as to face the axis of the lead wire 21.

  In this way, the leg portion 24 is biased toward the capacitor body 12 and a part of the leg portion 24 is clamped in the axial direction, so that the vibration of the leg portion 24 of the lead wire 21 in the axial direction is suppressed, and the lead wire 21 can be prevented from being damaged near the soldering portion 306.

  Further, even if the leg portion 24 of the lead wire 21 is deformed due to assembly variation, the deformation of the leg portion 24 is less affected by stress on the capacitor body 12 than the protruding portion 22, thereby ensuring good assembling workability. Damage to the capacitor 11 during assembly can be suppressed.

As shown in FIGS. 3 and 5, the first clamping portion 36 of the lower holder 32 is provided on the outer surface of one side portion 116 of the first storage portion 110, and is below the lower semicircle side of the circular opening 40. The first clamping part has a support part 102 that protrudes outward from the left and right sides as a base, and is laid parallel to the outer surface of the side part 116 so as to block the lower semicircle side of the circular opening 40. 36 is provided in an L-shaped cross section with the end of the support portion 102 facing upward.

  The support portion 102 of the first clamping portion 36 is provided below the bent portion 23 of the lead wire 21, and the flat portion 104 of the support portion 102 is provided perpendicular to the substrate surface 302 and abuts against the pair of lead wires 21. ing.

  The first clamping part 36 is provided in a fixed state in order to support the leg part 24 and to determine the arrangement position of the lead wire 21. Here, the fixed state is configured so as not to be elastically deformed by the urging of the second clamping portion 38.

  Further, the first clamping part 36 is integrally provided in a straight line along the outer surface of the side part 116 of the lower holder 32 corresponding to the parallel arrangement of the capacitors 11.

  On the other hand, as shown in FIGS. 7 and 8, the second holding portion 38 of the upper holder 34 is provided on the outer surface of one side portion 216 of the second storage portion 210, and is located on the right side of the upper half side of the circular opening 40. A pair of plate-like arms 202 extending outward from the left and right sides as base points, and a plate-like bridge portion 204 suspended between the lower ends of the pair of arms 202 and horizontally provided between the arms 202. And have.

  As shown in FIG. 3, the second clamping portion 38 is provided so that the end portion of the bridge portion 204 faces downward and the bridge portion 204 blocks the lower half side of the circular opening 40, and is provided in an L-shaped cross section. It has been.

  The pair of arms 202 is elastically deformed outward with a portion protruding outward as a fulcrum.

  The bridge portion 204 is provided with a convex pressing portion 206 that contacts the leg portion 24 of the lead wire 21 on the capacitor body 12 side. The convex pressing portion 206 is attached to the lead wire 21 by a restoring force generated by elastic deformation of the arm 202. It has a structure that makes it easy.

  In order to elastically deform the pair of arms 202, in a free state where the pair of arms 202 is not elastically deformed, the pair of arms 202 extends vertically downward, and the tip of the convex pressing portion 206 is disposed at a position where the lead wire 21 is led out. Configured to be

  As a specific configuration, the distance between the tip of the convex pressing portion 206 in the free state and the flat portion 104 of the support portion 102 is set to 0.3 to 0.8 times the diameter R of the lead wire 21. Further, the distance between the tip of the convex pressing portion 206 in the free state and the substrate surface 302 is set to a height of 0.5 to 0.7 times the interval L between the protruding portion 22 of the lead wire 21 and the substrate surface 302. . By providing such an interval, it is possible to optimally adjust the urging force and to prevent the arm 202 from being damaged due to elastic deformation.

  As described above, the second holding portion 38 is provided in a half frame shape having an opening by the pair of arms 202 and the bridge portion 204. Through the opening of the second clamping portion 38, the contact state between the convex pressing portion 206 and the lead wire 21 and the swollen state of the sealing body 14 of the capacitor 11 can be visually confirmed.

  Further, a pair of arms 202 of the second clamping unit 38 is provided for each capacitor 11, and adjacent arms 202 are connected to each other. The second clamping portion 38 is integrally provided in a half-ladder shape along the outer surface of the side portion 216 of the upper holder 34 corresponding to the parallel arrangement of the plurality of capacitors 11.

  In FIG. 1, the pair of arms 202 are connected to each of the three capacitors 11, but may be provided to each capacitor 11 without being connected.

  As described above, the first holding portion 36 of the lower holder 32 has the support portion 102 that protrudes outward and is fixed, and the second holding portion 38 of the upper holder 34 protrudes outward and forms a pair. It has a bridge part 204 suspended between the arms 202 that are elastically deformed, and is configured to urge the leg part 24 of the lead wire 21 toward the capacitor body 12 side. With this configuration, it is easy to adjust the pressing force for holding the leg portion 24 of the lead wire 21. Therefore, vibration resistance can be improved, and when the lower holder 32 and the upper holder 34 are fitted, the reaction force of the clamping force between the first clamping part 36 and the second clamping part 38 can be adjusted, so that the fitting is possible. It becomes easy and it can be set as the capacitor module which is excellent in assembly workability | operativity and can improve vibration resistance.

  The lower holder 32 and the upper holder 34 are provided with a plurality of lower engaging portions and upper engaging portions.

  As shown in FIG. 5, the lower engaging portions 120, 122, 124 of the lower holder 32 are lock claws provided upward, and a pair of lower engaging portions 120, 122 and shafts are provided on both side surfaces in the axial direction. Two pairs of other lower engaging portions 124 are provided on the end sides of both side surfaces in the vertical direction.

  As shown in FIG. 7, the upper engagement portions 220, 222, and 224 of the upper holder 34 are flat engagement portions that engage the lock claws so as to correspond to the lower engagement portions 120, 122, and 124 of the lower holder 32. It is. Further, on both sides of the locking portion, a locking portion 228 for restricting sliding on the flat surface of the locking claw is provided so as to be slidable by a predetermined width in the direction between the locking portions 228. When the upper engagement portions 220, 222, 224 and the lower engagement portions 120, 122, 124 are engaged with each other by being slidable in this way, the first holding portion 36 and the second holding portion 36 The reaction force of the portion 38 can be absorbed, and good assembly workability can be obtained.

  Further, as shown in FIG. 5, the lower holder 32 is provided with a lower insertion portion 126 between a pair of lower engagement portions 120, 122 provided on both side surfaces in the axial direction, and the lower insertion portion 126 has a tip. The conical guide part and the bottom part are provided in a convex shape as a cylindrical positioning part.

  As shown in FIG. 8, the upper holder 34 is provided with an upper insertion portion 226 between the upper engagement portions 220 and 222 so as to correspond to the lower insertion portion 126.

  The upper insertion portion 226 is provided with a cylindrical concave shape on the inner surface, and the convex shape of the lower insertion portion 126 is fitted in the concave shape of the upper insertion portion 226. As a result, when the second holding portion 38 urges the lead wire 21 and the lower engagement portion 122 and the upper engagement portion 222 on the opposite side of the lead wire 21 are about to separate, the lower insertion portion It is possible to prevent the outer peripheral surface of the positioning portion 126 from coming into contact with the inner peripheral surface of the upper insertion portion 226 and the lower engagement portion 122 and the upper engagement portion 222 from coming off.

  Further, the lower insertion part 126 and the upper insertion part 226 are provided on the lead wire 21 side from the center between the lower engagement parts 120 and 122 and between the upper engagement parts 220 and 222, respectively. The spacing accuracy between the contact portion of the portion 36 and the lower insertion portion 126 and between the contact portion of the second clamping portion 38 and the upper insertion portion 226 can be increased, and the urging force against the lead wire 21 can be stabilized. can do.

  In FIG. 7, the upper insertion portion 226 is provided adjacent to the reinforcing portion 214 on the lead wire 21 side on the side opposite to the pressing portion 232 of the upper holder 34 and avoiding the pressing portion 232.

Further, the lower holder 32 and the upper holder 34 are provided with a lower screw hole 130 and an upper screw hole 230, respectively. The lower screw hole 130 is located on the side 118 side opposite to the first clamping part 36. It is provided close to the engaging portion 124.

  As shown in FIG. 2, the lower screw hole 130 and the upper screw hole 230 are overlapped with the screw fixing portion 404 of the lower outer case 400 and screwed with a screw 406, so that the lower holder 32 and the upper holder 34 are connected. It is firmly fixed and the fitting of the lower holder 32 and the upper holder 34 is completed.

  Further, as shown in FIG. 6, the lower holder 32 is provided with a board lock claw 132 facing downward to be fixed to the wiring board 300, and the board lock claw 132 has a rectangular through hole provided in the wiring board 300. Engaged. The convex board insertion portion 134 is fitted into a circular through hole provided in the wiring board 300 to position the lower holder 32 with respect to the wiring board 300.

  The lower holder 32 is provided with a case insertion portion 136 that fits into a boss provided in the outer case 400 in order to maintain a predetermined distance from the lower outer case 400.

  As described above, the capacitor module 10 according to the first embodiment holds the lead wire 21 at the same time as the upper holder 34 and the lower holder 32 are fitted together, so that the assembling work can be simplified and the assembling workability is excellent. .

(Embodiment 2)
Except for the configuration different from that of the first embodiment, the same reference numerals as those of the first embodiment are given and the description thereof is omitted.

  As shown in FIG. 10, the leg portion 24 a of the lead wire 21 a is led out obliquely so as to move away from the capacitor body 12 as it goes downward toward the substrate surface 302.

  With respect to the lead-out state of the lead wire 21a, the upper end edge of the support portion 102 of the first holding portion 36 abuts and supports the lead wire 21a, and the convex pressing portion 206 of the second holding portion 38 is supported by the first pressing portion 206. The abutting portion of the lead wire 21a is in contact with the leg portion 24a below the abutting portion of the holding portion 36.

  As described above, by providing the contact portion of the first holding portion 36 and the contact portion of the second holding portion 38 at different positions with respect to the axis of the lead wire 21a, vibration resistance can be further improved.

  In the lead-out state of the lead wire 21 a, the angle φ of the line connecting the connection portion with the wiring substrate 300 and the contact portion of the first holding portion 36 is preferably 75 to 85 degrees with respect to the substrate surface 302.

  The capacitor module of the present invention is excellent in assembly workability and has an effect of improving vibration resistance, and is useful for a capacitor module in which a capacitor is attached to a wiring board.

DESCRIPTION OF SYMBOLS 10 Capacitor module 11 Capacitor 12 Capacitor body 21, 21a Lead wire 22 Protruding part 23 Bending part 24, 24a Leg part 32 Lower holder 34 Upper holder 36 First clamping part 38 Second clamping part 40 Circular opening 102 Support part 104 Flat Part 110 First storage part 112 U-shaped part 116, 118 Side part 120, 122, 124 Lower engagement part 126 Lower insertion part 202 Arm 204 Bridge part 206 Convex pressing part 210 Second storage part 212 U-shaped part 216 218 Side portions 220, 222, 224 Upper engagement portion 226 Upper insertion portion 300 Wiring substrate 302 Substrate surface 306 Soldering portion

Claims (3)

A capacitor having a capacitor body and a lead wire protruding in an axial direction from one end of the capacitor body;
A holder for storing the capacitor body;
A wiring board in which the holder is fixed to the board surface;
The lead wire has legs that are bent toward the board surface and connected to the wiring board;
The holder is provided with a first clamping part and a second clamping part that clamp a part of the leg part in the axial direction,
The second holding part has a bridge part suspended between a pair of arms that project outward and elastically deform,
The bridge portion urges the leg portion toward the capacitor main body.
Capacitor module. The capacitor body is held in the holder;
The capacitor module according to claim 1. The leg portion is led obliquely away from the capacitor main body toward the substrate surface, and the contact portion of the second clamping portion that contacts the leg portion is the first contact that contacts the leg portion. Provided on the side closer to the substrate surface than the abutting portion of the clamping portion,
The capacitor module according to claim 1 or 2.

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