JP4966350B2 - Harness clamp structure - Google Patents

Description

  The present invention relates to a harness clamp structure and, for example, relates to a fixing structure (hereinafter referred to as a harness clamp structure) of an electric cable (hereinafter referred to as a harness) that connects a fuel cell stack and a control unit.

  In a vehicle including a fuel cell stack to which a control unit is connected, when an impact is applied to the vehicle body due to a collision or the like, a harness that connects the fuel cell stack and the control unit may fall off. For this reason, it is necessary to reduce the tension (hereinafter referred to as “stress”) applied to the connecting portion of the harness due to an external impact. In general, various wiring structures are employed that reduce stress applied to a cable connection portion when pressure is applied to a harness that connects the devices.

  In the wiring structure of the electrical device described in Patent Document 1 below, a first locking groove that prevents movement of the lead wire along at least one of two directions orthogonal to each other through which the lead wire is inserted, and the lead wire Is inserted into the wiring board and has a locking portion of a second locking groove that prevents movement of the lead wire along at least the other direction. The intermediate portion of the lead wire of the snap terminal for connecting the electrical component is locked to the locking portion, and the base end portion of the lead wire is connected to the wiring board by soldering. In such a wiring structure, even if the snap terminal is pulled, the first locking groove and the second locking groove do not apply stress to the soldering portion of the wiring board of the lead wire.

  In the circuit board connection structure described in Patent Document 2 below, a slit is provided in the hard circuit board, and an end of the flexible wiring board is drawn out from the other surface side of the hard circuit board to one surface side through the slit. And the connection lead part formed in the edge part of a flexible wiring board is connected to the electrode terminal part formed in the one surface of a hard circuit board by soldering material etc. By providing a slit in the hard circuit board and passing the end of the flexible wiring board through the slit in this way, mechanical stress is not directly applied to the connection portion between the hard circuit board and the flexible wiring board. it can.

  In the panel instrument described in Patent Document 3 below, the cable connected to the panel cover surface side of the first printed circuit board having the light emitting element is connected to the first printed circuit board on the side opposite to the panel cover surface side. 2 is connected to the printed circuit board. In such a panel instrument, it is guided by a hole for guiding the cable in the thickness direction with respect to the first printed circuit board, a spacer for making the distance between the light emitting element and the first printed circuit board constant, and a hole for the spacer. The cable has a guide plate structure for guiding the cable into the panel cover. In such a structure, the cable is prevented from being disconnected by passing the hole that guides the cable in the thickness direction with respect to the first printed board, the hole of the spacer, and the guide plate.

JP 2001-119166 A JP 2005-56952 A Japanese Utility Model Publication No. 06-45388

  In the wiring structure of the electric device of Patent Document 1, two cutout grooves, the first lock groove and the second lock groove, are necessary, and a lead wire must be inserted into the two cutout grooves. The wiring structure becomes complicated because it does not become necessary. Further, in the circuit board connection structure disclosed in Patent Document 2, a slit is required in the hard circuit board, and a solder material or the like is provided on the opposite side of the hard circuit board through the end of the flexible wiring board in the slit of the hard circuit board. The mechanical stress cannot be sufficiently reduced only by connecting. Moreover, in the panel instrument of patent document 3, the hole which guides a cable to the thickness direction with respect to a 1st printed circuit board, the spacer which makes constant the space | interval of a light emitting element and a 1st printed circuit board, and the hole of a spacer A guide plate for guiding the cable guided by the cable into the panel cover is required, and the stress at the connection portion of the cable cannot be sufficiently reduced only by passing the cable through them.

  This invention is made | formed in view of such a condition, and it aims at providing the technique which can solve the said subject.

The harness clamp structure of the present invention includes a wiring board in the connector portion, and a notch groove is formed in one position of the upper end portion of the wiring board so as to be opened upward so that the harness is accommodated. the substrate conductor hole at a position spaced a predetermined distance laterally from the position where the harness to the upper portion from the lower portion at one end face are wirings formed, the harness at one end surface side of the wiring substrate The harness is linearly wired from the lower end toward the notch groove, and the harness is bent in the opposite direction at the notch groove so that the harness is accommodated in the notch groove from above. is the other of the harness is wired and bent, the conductor holes of the conductor portion of the harness the wiring board between the conductor holes of said harness and the other end surface side of the wiring board and the cutout groove Is penetrated from the surface side to said one end face side, the conductor portion of the harness is characterized in that it is connected to the one end face of the wiring board.
Further, the connector part includes a cell terminal and a carrier, the cell terminal is connected to the wiring board, and the cell terminal is fixed to the wiring board by the carrier.
The connector portion of the control unit is connected to a separator of the fuel cell stack.
In addition, the connector portion is connected to the separator of the fuel cell stack so that the vertical direction coincides with a direction orthogonal to the stacking direction of the fuel cell stack.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which reduces the stress added to the connection part of a harness can be provided.

1 is an external view of a fuel cell stack, a control unit, and a separator according to an embodiment of the present invention. It is a disassembled perspective view which shows the structure of the control unit based on embodiment of this invention. It is the rear view and front perspective view of the connection part of a control unit based on embodiment of this invention. It is a structure figure of the side and front of the connection part of a control unit based on embodiment of this invention. It is a figure for demonstrating dropping of the harness of the control unit by the impact to the vehicle body based on embodiment of this invention. It is a figure for demonstrating the principle which the electric leakage by the impact to the vehicle body generate | occur | produces based on embodiment of this invention.

  As an embodiment of the present invention, a fuel cell stack in which a plurality of fuel cells are arranged in series and a harness clamp structure of a control unit connected to the fuel cell stack will be described as an example. The control unit is provided to bypass the failed fuel cell even when a part of the fuel cells in the fuel cell stack fails, to flow current, and to effectively operate the remaining normal fuel cells. The fuel cell stack is connected to the control unit main body of the control unit by a connector portion via a harness. The wiring board of the connector part is provided with a notch groove, and the harness is wired through the notch groove of the wiring board. As a result, even if a load is applied to the harness, the load is dispersed in the notch groove, so that the stress at the connection portion is reduced. Further, a bent portion is provided in a part of the harness to distribute the load. These load distributions can effectively prevent damage to the harness connecting portion.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described with reference to the drawings. The reference numerals of parts not related to the description of the present invention are omitted.

  FIG. 1A is an external view of the fuel cell stack 100 and the control unit 200 according to this embodiment. The fuel cell stack 100 includes a pressing plate 110, a plurality of stacked separators 120, an electrode unit (not shown) disposed between the separators 120, a control unit holding bar 130, and the like. The pressing plate 110 is installed on the side surface of the fuel cell stack 100 and protects the fuel cell stack 100 when loaded from the side surface of the fuel cell stack 100. The control unit holding bar 130 is a boat for holding the control unit main body 230 of the control unit 200.

  The control unit 200 includes a connector part 210, a harness 220, and a control unit main body 230. The connector part 210 is a part that connects the control unit main body 230 to the fuel cell stack 100, and is connected to the separator 120 via a voltage terminal 120d of the separator 120 shown in FIG. The voltage terminals 120d are provided every several pieces instead of every separator 120 (see FIG. 6 described later), and are connected to the connector part 210 as shown in FIG. The harness 220 is an electric cable that connects the connector unit 210 and the control unit main body 230. The control unit main body 230 is a part that flows current by bypassing the failed fuel cell 100a (see FIG. 6 described later) when the fuel cell stack 100 fails.

  FIG. 1 (2) is a diagram showing the appearance of the separator 120 and the connection with the connector part 210. The separator 120 is a conductor, for example, a resin-impregnated graphite plate in which a graphite plate is impregnated with a phenol resin and cured. Further, a metal plate such as stainless steel plated with gold may be used. The separator 120 is provided with a fuel gas supply communication hole 120a, a cooling medium supply communication hole 120b, an oxidant gas supply communication hole 120c, and a voltage terminal 120d. Between the separator 120 and the separator 120, an electrode unit is disposed in which an electrolyte is sandwiched between two electrodes, a hydrogen electrode as a cathode and an oxygen electrode as an anode. A fuel gas containing hydrogen as a main component is supplied to the hydrogen electrode side of the electrode unit via the fuel gas supply passage 120a, and an oxidant gas containing oxygen as a main component is supplied to the oxygen electrode side of the electrode unit. An electromotive force is obtained by causing an electrochemical reaction by supplying through the communication hole 120c. In addition, the fuel cell 100a is cooled by supplying a cooling medium such as pure water through the cooling medium supply communication hole 120b.

  By stacking a plurality of such separators 120 with an electrode unit in between, a fuel cell 100a is obtained. A plurality of fuel cells 100a are stacked to form a fuel cell stack 100. The voltage terminal 120d is provided in the separator 120 at both ends of the fuel cell 100a. And the cell terminal 213 of the connector part 210 of the control unit 200 mentioned later is fitted by the voltage terminal 120d of the separator 120. FIG.

  FIG. 2 is an exploded perspective view showing the configuration of the control unit 200. As shown in FIG. 2, the control unit body 230 includes a diode portion 231, a heat radiating portion 232, an inner cover portion 233, and an outer cover portion 234, and each is fixed by being screwed with a screw 236. The

  A plurality of diode chips 235 are attached to the diode portion 231. The diode chip 235 is connected to the connector unit 210 via the harness 220.

  The heat radiation part 232 is a part that radiates heat generated by the control unit 200. The inner cover part 233 is a part that covers and protects the diode chip 235 attached to the diode part 231. The outer cover part 234 is a part that is installed on the outer surface of the control unit 200 and protects the control unit 200 when an external force is applied to the control unit 200 when a collision occurs.

  FIG. 3 is a perspective view of the back and front of the connector part 210 of the control unit 200 according to the embodiment. FIG. 3A is a rear perspective view of the connector portion 210, and FIG. 3B is a front perspective view of the connector portion 210. The connector unit 210 includes a wiring board 211, a carrier 212, and cell terminals 213. The wiring board 211 is a printed board. As shown in FIGS. 3A and 3B, a cutout groove 211 a that houses the harness 220 is formed at the upper end of the wiring board 211. Further, as shown in FIGS. 3A and 3B, the conductor hole is located at a predetermined distance in the lateral direction from the position where the harness 220 is wired from the lower end to the upper end on the back side of the wiring board 211. 211b is formed.

  When wiring the harness 220 on the wiring board 211 having such a structure, as shown in FIG. 3A, the harness 220 is linearly wired from the lower end on the back side of the wiring board 211 to the upper end, and cut. The harness 220 is bent so that the harness 220 is accommodated in the notch 211a.

  Next, as shown in FIG. 3B, the harness 220 is wired from the notch groove 211a toward the lower end on the front side of the wiring board 211, and the conductor portion of the harness 220 is inserted from the conductor hole 211b on the front side of the wiring board 211. To do. At this time, the position of the conductor hole 211b of the wiring board 211 is formed at a predetermined interval in the lateral direction from the position where the harness 220 is wired from the lower end to the upper end on one end surface side of the wiring board 211. Therefore, the harness 220 is bent and wired with a margin. Next, the conductor portion of the harness 220 inserted into the conductor hole 211b penetrates to the back side of the wiring board 211 and is soldered to the back side of the wiring board 211 as shown in FIG. This wiring order can be performed in the reverse order. That is, the conductor portion of the harness 220 inserted into the conductor hole 211b can be soldered on the back surface of the wiring board 211 and then bent so as to be accommodated in the notch groove 211a, and wired from the upper end portion to the lower end portion on the back surface side.

  The carrier 212 is a part that bites the cell terminal 213 and fixes the cell terminal 213. By fitting the cell terminal 213 with the voltage terminal 120d of the separator 120, the connector part 210 and the separator 120 are connected.

  4A is a side structural view of the connector portion 210 of the control unit 200, and FIG. 4B is a front structural view of the connector portion 210 of the control unit 200.

  Hereinafter, the assembly procedure of the connector part 210 will be described with reference to FIGS. The harness 220 is already wired in the above procedure. First, the cell terminal 213 is inserted into the wiring substrate 211 so as to be engaged with the carrier 212. Next, the cell terminal 213 is soldered at a portion penetrating the wiring board 211 to fix the carrier 212 to the wiring board 211. By fixing the carrier 212 in this way, the cell terminal 213 is fixed in a state of being penetrated through the wiring board 211. Next, the wiring board 211 is screwed with screws 214 through the screw holes 215 shown in FIG.

  FIG. 5 is a diagram for explaining the dropping of the harness 220 when a load is applied due to an impact on the vehicle body. FIG. 5 (1) shows the external appearance of the fuel cell stack 100 and the control unit 200. FIG. 5B shows the state of the control unit holding bar 130 and the control unit main body 230 as viewed from above when the control unit holding bar 130 is bent by a load. FIG. 5 (3) shows a state in the harness clamp structure of the present invention when the diode control unit holding bar 130 is bent.

  FIG. 6 is a diagram for explaining the principle of leakage occurring when a load is applied due to an impact on the vehicle body. FIG. 6 shows the state of the normal fuel cell stack 100 and the control unit 200. As shown in FIG. 6, the fuel cell stack 100 includes a plurality of fuel cells 100 a including a plurality of separators 120. As described above, the control unit 200 is connected to the voltage terminals 120 d provided on every few separators 120 and the cell terminals 213 of the connector unit 210 of the control unit 200. In the fuel cell 100a in FIG. 6, a current flows in a direction from A to B in the drawing.

  Here, when the control unit holding bar 130 is bent when a load is applied from the pressing plate 110 side due to an impact on the vehicle body, the control unit holding bar 130 is pushed outward. In such a case, the influence on the vehicle body due to the difference between the conventional harness clamp structure and the harness clamp structure of the present invention will be described with reference to FIGS.

  As shown in FIG. 5A, the control unit holding bar 130 and the control unit main body 230 are fixed to the fuel cell stack 100 with screws 130a. Here, as shown in FIG. 5A, when a load is applied from the side of the pressing plate 110 due to an impact on the vehicle body, for example, the control unit holding bar 130 is bent by the load. Then, as shown in FIG. 5 (2), the control unit holding bar 130 is bent, and the control unit main body 230 is pushed outward.

  In the harness clamp structure of the conventional control unit 200, a part of the harness 220 may come out of the connector part 210 and contact the vehicle. It is assumed that the harness 220 is dropped from some of the connector portions 210 and contacts the vehicle, but the other harness 220 is not dropped. As a result, when the harness 220 that has fallen off from the connector portion 210 contacts the vehicle body, a current flows through the harness 220 that has fallen off from the fuel cell 100a via the harness 220 that does not fall off, resulting in leakage.

  However, according to this embodiment, as shown in FIG. 5 (3), even if the control unit holding bar 130 is bent and the control unit main body 230 is pushed outward, the harness clamp structure of this embodiment The harness 220 is not dropped from the connector part 210 while maintaining the state shown in FIG. Therefore, unlike the harness clamp structure of the conventional control unit 200, a part of the harness 220 does not come out of the connector part 210 and comes into contact with the vehicle body, and thus no leakage occurs.

  As described above, according to this embodiment, the control unit 200 applies a load to the harness 220 by providing the notch groove 211a in the upper end portion of the wiring board 211 as shown in FIGS. 3 (1) and (2). In addition, since the load is dispersed in the notch groove 211a, it is possible to avoid the harness 220 from falling off the wiring board 211.

  Further, the position of the conductor hole 211b of the wiring board 211 is formed at a predetermined interval in the horizontal direction from the position where the harness 220 is wired from the lower end to the upper end on the back side of the wiring board 211. The harness 220 is bent and wired with a margin from the notch groove 211a to the conductor hole 211b, and then inserted into the conductor hole 211b and soldered on the back surface of the wiring board 211. By the harness clamp structure wired in this way, the load of the harness 220 is distributed even in the bent and wired portion, and the harness 220 is more effectively avoided from falling off the wiring board 211. Can do.

  In addition, it is possible to provide a control unit 200 that prevents leakage of electric current to the vehicle body and further improves safety in the event of a vehicle collision by reducing stress at a connection portion between the connector portion 210 and the harness 220 of the control unit 200. Can do.

  Further, as shown in FIG. 4A, the control unit 200 uses the carrier 212 to couple the wiring board 211 and the cell terminal 213 so that a load is applied when the vehicle is rotated or due to an impact on the vehicle body. The stress on the soldered portion between the cell terminal 213 and the wiring board 211 can also be removed.

  In the above, it demonstrated based on embodiment. This embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to each of those components and combinations thereof, and such modifications are also within the scope of the present invention. For example, in the above-described embodiment, the harness clamp structure for connecting the fuel cell and the control unit has been illustrated. However, the present invention is not limited to this and can be applied to the harness clamp structure for other uses.

DESCRIPTION OF SYMBOLS 100 ... Fuel cell stack 100a ... Fuel cell 110 ... Pushing plate 120 ... Separator 120a ... Fuel gas supply communication hole 120b ... Cooling medium supply communication hole 120c ... Oxidant gas supply communication hole 120d ... Voltage terminal 130 ... Control unit holding bar 130a ... Screw 200 ... Control unit 210 ... Connector 211 ... Wiring board 211a ... Notch groove 211b ... Conductor hole 212 ... Carrier 213 ... Cell terminal 214 ... Screw 215 ... Screw hole 220 ... Harness 230 ... Control unit body 231 ... Diode part 232 ... Heat radiation part 233 ... Inner cover part 234 ... Outer cover part 235 ... Diode chip 236 ... Screw

Claims (4)

The connector part is equipped with a wiring board,
A notch groove is formed in one portion of the upper end of the wiring board so as to be opened upward and accommodate a harness,
The wiring board conductor hole is formed at a position spaced a predetermined distance in the lateral direction from the position in which the harness from the lower end at one end face side to the upper portion is the wiring,
The harness is linearly wired to the upper part toward the notch groove from the lower end portion at the one end face of the wiring board, wherein in from above the cutout groove to accommodate the harness The harness is bent in the opposite direction at the notch groove ,
The harness is bent and wired between the notch groove and the conductor hole on the other end surface side of the wiring board,
Conductor portion of the harness is through the one end face from the other end face side of the conductor holes of the wiring board,
The harness clamp structure characterized by the conductor part of the said harness being connected to the said one end surface side of the said wiring board. The connector part includes a cell terminal and a carrier,
The harness clamp structure according to claim 1, wherein the cell terminal is connected to the wiring board, and the cell terminal is fixed to the wiring board by the carrier.   The harness clamp structure according to claim 1 or 2, wherein the connector portion of the control unit is connected to a separator of the fuel cell stack. 4. The harness clamp structure according to claim 3, wherein the connector portion is connected to the separator of the fuel cell stack so that a vertical direction coincides with a direction orthogonal to a stacking direction of the fuel cell stack. .

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