JP2012170193A - Onboard power supply unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise occurring in an electric power transmission line connected to an electric circuit in an onboard power supply system.SOLUTION: An onboard power supply system includes a positive electrode bus bar 30P and a negative electrode bus bar 30N which transmit electric power to an electric circuit unit. The positive electrode bus bar 30P and the negative electrode bus bar 30N include a flat plate opposing section where the bus bars are disposed in parallel with each other so that plate surfaces thereof face each other. The positive electrode bus bar 30P is arranged so that the upper plate surface faces the inner face of a unit case 26 and the lower plate surface faces the upper plate surface of the negative electrode bus bar 30N. The negative electrode bus bar 30N is arranged so that the lower plate surface faces the inner face of the unit case 26 and the upper plate surface faces the lower plate surface of the positive electrode bus bar 30P.

Description

  The present invention relates to a vehicle-mounted system, and more particularly to a vehicle-mounted power supply system with improved characteristics of a power transmission line connected to an electric circuit.

  Electric vehicles such as a hybrid vehicle that travels using an engine and a motor generator and an electric vehicle that travels using a motor generator are widely used. Such an electric vehicle includes an electric circuit such as a secondary battery, a DCDC converter circuit that performs voltage step-up / step-down, and an inverter circuit that performs DC / AC conversion.

  During vehicle acceleration, the DCDC converter circuit boosts the output voltage of the secondary battery and outputs DC power based on the boosted voltage to the inverter circuit. The inverter circuit converts the DC power supplied from the DCDC converter circuit into AC power, and supplies the AC power to the motor generator. At the time of vehicle regenerative braking, the inverter circuit converts AC power generated by the motor generator into DC power and outputs the DC power to the DCDC converter circuit. The DCDC converter circuit steps down the voltage based on the DC power and applies it to the secondary battery to charge the battery. Inverter circuits include those that perform direct current alternating current conversion between the DCDC converter circuit and the motor generator as described above, and those that are directly connected to the battery and perform direct current alternating current conversion between the battery and the motor generator.

  In Patent Document 1 below, a wiring structure for mounting on a vehicle is described. This wiring structure includes a wiring block to which an inverter bridge is attached. In the wiring block, a bus bar on the positive electrode side and a bus bar on the negative electrode side connecting the inverter bridge and the power supply device are embedded. The positive-side bus bar and the negative-side bus bar are arranged in parallel, but these bus bars are not arranged with the plate surfaces facing each other.

Japanese Patent Laid-Open No. 10-304679

  In the DCDC converter circuit, the voltage is stepped up / down by switching of the switching element, and in the inverter circuit, DC / AC conversion is performed by switching of the switching element. Therefore, switching-based noise may appear in the power transmission line connecting the battery and these electric circuits. This noise may prevent other electrical devices mounted on the vehicle from maximizing performance.

  The present invention has been made for such a problem. That is, an object of the present invention is to reduce noise appearing on a power transmission line connected to an electric circuit in a vehicle-mounted power supply system.

  The present invention relates to an electric circuit unit that exchanges electric power with an electric storage unit that stores electric power, and a plurality of electric powers that connect the electric storage unit and the electric circuit unit and each have a plate section formed in a plate shape. And the plurality of power transmission lines are arranged so that the plate surfaces of the flat plate sections of the adjacent power transmission lines face each other.

  In the vehicle-mounted power supply system according to the present invention, preferably, the electric circuit unit includes a plurality of electric circuits each of which transfers power to and from the power storage means, and the plurality of power transmission lines Each of the plate sections has a branch section in which one end of a plate section is connected to the power storage means and branches from the plate section to each electric circuit. Further, they are arranged so as to face each other on the power storage means side than the respective branch sections.

  The vehicle-mounted power supply system according to the present invention preferably includes a conductive unit case that houses at least one of the plurality of electric circuits and a part of the plurality of power transmission lines. Among the plurality of power transmission lines, the power transmission line close to the inner surface of the unit case is arranged with the plate surface of the flat plate section facing the inner surface of the unit case.

  In the vehicle-mounted power supply system according to the present invention, preferably, a plurality of protrusions are arranged on each of the inner surface of the unit case and the plate surface of the flat plate section facing the inner surface, The plurality of protrusions arranged on the plate surface and the plurality of protrusions arranged on the inner surface of the unit case are positioned so as to enter the gap.

  In the vehicle-mounted power supply system according to the present invention, preferably, at least one of the plurality of electric circuits and the plurality of electric power transmissions, a conductor tube penetrating each flat plate section of the plurality of electric power transmission lines. And a conductive unit case for housing the conductor cylinder, and the conductor cylinder is conductively connected to the unit case.

  The vehicle-mounted power supply system according to the present invention preferably includes a dielectric member that is filled between the inner surface of the conductor tube and each flat section of the plurality of power transmission lines.

  In the vehicle-mounted power supply system according to the present invention, preferably, a plurality of protrusions are arranged on each of the inner surface of the conductor tube and the plate surface of the flat plate section facing the inner surface, The plurality of protrusions arranged on the plate surface and the plurality of protrusions arranged on the inner surface of the conductor tube are positioned so as to enter the gap.

  In the vehicle-mounted power supply system according to the present invention, preferably, a plurality of protrusions are arranged on each of two plate surfaces facing each other in adjacent plate sections, and arranged on one plate surface. The plurality of protrusions and the plurality of protrusions arranged on the other plate surface are positioned so as to enter the gap.

  ADVANTAGE OF THE INVENTION According to this invention, the noise which appears in the power transmission line connected to the electric circuit can be reduced in the electric power supply system for vehicle mounting.

1 is a diagram illustrating a configuration of a vehicle-mounted power supply system according to an embodiment. It is a figure which illustrates a connector connection end part and a part of flat plate opposing area with a unit case. It is the figure which showed typically the cross section of the unit case, the positive electrode bus bar, and the negative electrode bus bar. It is a figure which shows the structure of the flat plate opposing area using a conductor cylinder. It is a figure which shows the structure of the inner wall surface of the positive electrode bus bar, the negative electrode bus bar, and a conductor cylinder in the application example of the structure of a flat plate opposing area. It is sectional drawing about the application example of the structure of a flat plate opposing area.

  FIG. 1 shows a vehicle-mounted power supply system 10 according to an embodiment of the present invention. This system includes a secondary battery 12 and an electric circuit unit 18, which are connected by a power transmission line including a pair of power cables 14, a positive bus bar 30P, and a negative bus bar 30N. The electric circuit unit 18 adjusts power used for driving the vehicle, power supplied to the accessory device, and the like.

  The secondary battery 12 is a storage means that can be charged and discharged. A capacitor that increases the charging capacity may be connected in parallel to the secondary battery 12 as other power storage means. One end of a power cable 14 is connected to the positive electrode and the negative electrode of the secondary battery 12. A cable connector 16 is connected to the other end of each power cable 14. The cable connector 16 can be attached to and detached from each end of the positive bus bar 30P and the negative bus bar 30N forming the power transmission line in the electric circuit unit 18. Here, the bus bar refers to a plate-shaped conductor extending in the power transmission direction.

  The electric circuit unit 18 includes a first power circuit 20, a second power circuit 22, and a step-down converter circuit 24. Among these electric circuits, the first power circuit 20 and the second power circuit 22 are housed in a conductive unit case 26. The step-down converter circuit 24 is disposed outside the unit case 26 and is connected to a step-down converter connector 28 provided in the unit case 26.

  The first power circuit 20, the second power circuit 22, and the step-down converter circuit 24 are connected to a positive electrode bus bar 30P and a negative electrode bus bar 30N that branch from the cable connector 16 toward each other. The positive bus bar 30P includes a first positive bus bar 32P that connects the power cable 14 and the first power circuit 20, a second positive bus bar 34P that connects the first positive bus bar 32P and the second power circuit 22, and A third positive bus bar 36P for connecting the first positive bus bar 32P and the step-down converter connector 28 is included.

  The negative electrode bus bar 30N includes a first negative electrode bus bar 32N connecting the power cable 14 and the first power circuit 20, a second negative electrode bus bar 34N connecting the first negative electrode bus bar 32N and the second power circuit 22, and A third negative bus bar 36N that connects between first negative bus bar 32N and step-down converter connector 28 is included.

  With such a configuration, the first power circuit 20, the second power circuit 22, and the step-down converter circuit 24 are connected to the secondary battery 12 via the positive bus bar 30P, the negative bus bar 30N, and the pair of power cables 14.

  Each of the first power circuit 20 and the second power circuit 22 includes at least one of electric circuits such as a DCDC converter circuit that performs voltage step-up / step-down and an inverter circuit that performs DC / AC conversion. For example, a vehicle drive motor generator is connected to the first power circuit 20. In this case, the first power circuit adjusts the power transferred between the secondary battery 12 and the vehicle drive motor generator. Another vehicle drive motor generator may be connected to the second power circuit 22. In this case, similar to the first power circuit 20, the second power circuit 22 adjusts the power transferred between the secondary battery 12 and the vehicle drive motor generator. The first power circuit 20 and the second power circuit 22 may be connected to other electric devices used for driving the vehicle in addition to the motor generator for driving the vehicle. The step-down converter circuit 24 steps down the voltage of the secondary battery 12 and outputs the stepped down voltage to a vehicle-mounted accessory device.

  The first power circuit 20, the second power circuit 22, and the step-down converter circuit 24 are configured using switching elements such as IGBTs (Insulated Gate Bipolar Transistors) and power MOSFETs. These electric circuits may be configured by using an intelligent power module (IPM: Intelligent Power Module) in which a basic circuit using a switching element is previously incorporated.

  The positive bus bar 30P and the negative bus bar 30N have a flat plate facing section 38 in which these bus bars are arranged in parallel with their plate surfaces facing each other. The flat plate facing section 38 is provided closer to the secondary battery 12 than the section where the positive electrode bus bar 30P and the negative electrode bus bar 30N branch to each electric circuit.

  FIG. 2 illustrates the connector connecting end 40P of the positive bus bar 30P, the connector connecting end 40N of the negative bus bar 30N, and a part of the flat plate facing section 38 together with the unit case 26. The positive electrode bus bar 30P is arranged such that the upper plate surface is directed to the inner surface of the unit case 26 and the lower plate surface is directed to the upper plate surface of the negative electrode bus bar 30N. The negative electrode bus bar 30N is arranged such that the lower plate surface is directed to the inner surface of the unit case 26 and the upper plate surface is directed to the lower plate surface of the positive electrode bus bar 30P. The positive electrode bus bar 30P and the negative electrode bus bar 30N are arranged in parallel, the upper plate surface of the positive electrode bus bar 30P and the inner surface of the unit case 26 are parallel, and the lower plate surface of the negative electrode bus bar 30N and the inner surface of the unit case 26 are Parallel.

  The connector connecting end 40P of the positive bus bar 30P is widened in the right direction, and the connector connecting end 40N of the negative bus bar 30N is widened in the left direction. Connector connection holes 40P and 42N are provided with connector attachment holes 42P and 42N, respectively. The cable connector 16 has a conductor piece 44P superimposed on the upper surface or the lower surface of the connector connection end portion 40P of the positive bus bar 30P, and a conductor piece 44N superimposed on the upper surface or the lower surface of the connector connection end portion 40N of the negative electrode bus bar 30N. The conductor piece 44P is provided with a screw hole 46P that matches the connector attachment hole 42P of the positive bus bar 30P, and the conductor piece 44N is provided with a screw hole 46N that matches the connector attachment hole 42N of the negative electrode bus bar 30N.

  When the cable connector 16 is attached, the positive conductor piece 44P is superimposed on the connector connection end 40P of the positive bus bar 30P and the negative conductor piece 44N is connected to the negative bus bar 30N, as indicated by the dashed arrows in FIG. Is overlapped with the connector connecting end 40N. Then, the bolt is passed through the connector mounting hole 42P and the screw hole 46P, and the bolt is further passed through the connector mounting hole 42N and the screw hole 46N. The positive conductor piece 44P and the positive bus bar 30P are fixedly connected by the bolt and the nut fastened to the bolt, and the negative conductor piece 44N and the negative bus bar 30N are fixedly connected.

  FIG. 3 schematically shows cross sections of the unit case 26, the positive bus bar 30P, and the negative bus bar 30N in the flat plate facing section 38. Constituent elements that are the same as those shown in FIG. 2 are given the same reference numerals, and descriptions thereof are omitted. According to the above configuration, as shown in FIG. 3, the line capacitor Cx is formed between the positive bus bar 30P and the negative bus bar 30N. A line bypass capacitor Cyp is formed between the positive electrode bus bar 30P and the unit case 26, and a line bypass capacitor Cyn is formed between the negative electrode bus bar 30N and the unit case 26.

  The line capacitor Cx reduces the noise voltage appearing between the positive bus bar 30P and the negative bus bar 30N. That is, the line capacitor Cx reduces the differential mode noise. Line bypass capacitors Cyp and Cyn reduce the noise voltage appearing between positive bus bar 30P and unit case 26, and the noise voltage appearing between negative bus bar 30N and unit case 26, respectively. That is, the line bypass capacitors Cyp and Cyn reduce common mode noise.

  Since the first power circuit 20, the second power circuit 22, and the step-down converter circuit 24 operate by switching, noise based on switching may be output to the positive bus bar 30P and the negative bus bar 30N. The noise output from each electric circuit and reaching the flat plate facing section 38 is output to the power cable 14 after the level is reduced by the line-to-line capacitor and the line bypass capacitor formed in the flat plate facing section 38. Therefore, it is avoided that noise is transmitted over a wide range in the vehicle via the power cable 14. Thereby, it is possible to suppress the influence of noise on the operation performance of other electrical devices.

  Here, the electric circuit unit 18 has been described as including three electric circuits, that is, the first power circuit 20, the second power circuit 22, and the step-down converter circuit 24. The electric circuit unit 18 may include two electric circuits or a unit including four or more electric circuits. When the electric circuit unit 18 includes four or more electric circuits, the bus bar is further branched from the first positive bus bar 32P and the first negative bus bar 32N, and an additional electric circuit is connected to the branched bus bar.

  Next, an application example of the configuration of the flat plate facing section 38 will be described. FIG. 4 shows the structure of the flat plate facing section 38 using the conductor cylinder 48. In this structure, the positive electrode bus bar 30P and the negative electrode bus bar 30N are passed through the conductor cylinder 48 conductively connected to the unit case 26, thereby increasing the capacity of the line bypass capacitor.

  The conductor tube 48 has a rectangular tube hole surrounded on all sides by a conductor plate. The conductor cylinder 48 is fixed to the inner surface of the unit case 26. When the conductor tube 48 is fixed, the conductor tube 48 is disposed on the inner surface of the unit case 26 so that the bottom surface thereof is in conductive contact with the inner surface 54 of the unit case 26. Then, a band-shaped metal fitting 50 having a shape along the inner surface 54 of the unit case 26, the side surface of the conductor tube 48, and the upper surface of the conductor tube 48 is fitted onto the conductor tube 48. The band-shaped metal fitting 50 is provided with a screw hole 52 in a section in contact with the unit case 26. The belt-like metal fitting 50 is fixed to the unit case 26 by the bolts passed through the screw holes 52 and the screw holes provided in the unit case 26, and the nuts fastened to the bolts. 26 is fixed.

  Thus, instead of fixing the conductor tube 48 to the unit case 26 with bolts and nuts, the conductor tube 48 may be fixed to the unit case 26 by welding. Further, the conductor tube 48 and the unit case 26 may be integrally formed by a technique such as casting, sintering, or pressing.

  The positive electrode bus bar 30P is arranged such that the upper plate surface is directed to the inner wall surface of the conductor tube 48 and the lower plate surface is directed to the upper plate surface of the negative electrode bus bar 30N. The negative electrode bus bar 30N is arranged such that the lower plate surface is directed to the inner wall surface of the conductor tube 48 and the upper plate surface is directed to the lower plate surface of the positive electrode bus bar 30P. The positive electrode bus bar 30P and the negative electrode bus bar 30N are arranged in parallel, the upper plate surface of the positive electrode bus bar 30P and the inner wall surface of the conductor tube 48 are parallel, the lower plate surface of the negative electrode bus bar 30N and the inner surface of the conductor tube 48 The walls are parallel.

  According to such a structure, the distance between the plate surface of the positive electrode bus bar 30P and the inner wall surface of the conductor tube 48 or the distance between the plate surface of the negative electrode bus bar 30N and the inner wall surface of the conductor tube 48 is reduced. The capacity of the line bypass capacitor can be increased.

  In the structure shown in FIG. 4, a dielectric member such as plastic, rubber, or ceramic may be filled between the inner wall surface of the conductor tube 48 and each bus bar. Thereby, the insulation performance between each of the positive electrode bus bar 30P and the negative electrode bus bar 30N and the conductor cylinder 48 and the insulation performance between the positive electrode bus bar 30P and the negative electrode bus bar 30N can be improved. Thereby, the distance between the plate surface of the positive electrode bus bar 30P and the inner wall surface of the conductor tube 48 or the distance between the plate surface of the negative electrode bus bar 30N and the inner wall surface of the conductor tube 48 can be reduced. The capacity of the bypass capacitor can be increased. Furthermore, the distance between the positive electrode bus bar 30P and the negative electrode bus bar 30N can be reduced, and the capacitance of the line capacitor can be increased. Moreover, the capacitance of the line capacitor and the capacitance of the line-to-line capacitor can be increased by the electrical action of the dielectric member.

  Next, an application example of the structure of the flat plate facing section 38 will be described. FIG. 5A shows the configuration of the positive electrode bus bar 30P and the negative electrode bus bar 30N used in this application example. FIG. 5B shows the configuration of the inner wall surface of the conductor tube 48. Further, FIG. 6 shows a cross section of the conductor tube 48, the positive electrode bus bar 30P, and the negative electrode bus bar 30N when the conductor tube 48, the positive electrode bus bar 30P, and the negative electrode bus bar 30N are configured as shown in FIG. . The same components as those shown in FIGS. 2 and 4 are denoted by the same reference numerals, and description thereof is omitted.

  On both plate surfaces of the positive electrode bus bar 30P, a plurality of plate-like protrusions 56 are arranged in the extending direction so that the normal direction thereof coincides with the extending direction of the positive electrode bus bar 30P. Similarly, on both plate surfaces of the negative electrode bus bar 30N, a plurality of plate-like protrusions 56 are arranged in the extending direction so that the normal direction thereof coincides with the extending direction of the negative electrode bus bar 30N. The positive electrode bus bar 30P and the negative electrode bus bar 30N are arranged such that the plate-like protrusions 56 arranged on one side enter between the plate-like protrusions 56 arranged on the other side.

  In addition, a plurality of plate-like protrusions 56 are arranged along the positive electrode bus bar 30P on the inner wall surface on the upper side of the conductor tube 48 so that the respective normal directions coincide with the extending direction of the positive electrode bus bar 30P. Each plate-like protrusion 56 on the inner wall surface on the upper side of the conductor tube 48 is positioned between the plate-like protrusions 56 of the positive electrode bus bar 30P. Further, a plurality of plate-like protrusions 56 are arranged along the negative electrode bus bar 30N on the inner wall surface on the lower side of the conductor tube 48 so that the normal direction thereof coincides with the extending direction of the negative electrode bus bar 30N. Each plate-like protrusion 56 on the lower inner wall surface of the conductor tube 48 is located between the plate-like protrusions 56 of the negative electrode bus bar 30N.

  According to such a configuration, the facing area between the inner wall surface of the conductor tube 48 and the positive electrode bus bar 30P and the facing area between the inner wall surface of the conductor tube 48 and the negative electrode bus bar 30N are increased. Capacity increases. Moreover, the facing area between the positive electrode bus bar 30P and the negative electrode bus bar 30N increases, and the capacitance of the line capacitor increases. Thereby, the noise reduction effect can be improved.

  Note that the total of the region between the inner wall surface of the conductor tube 48 and the positive electrode bus bar 30P, the region between the inner wall surface of the conductor tube 48 and the negative electrode bus bar 30N, and the region between the positive electrode bus bar 30P and the negative electrode bus bar 30N. It is not necessary to arrange the plate-like projections 56 at all, and the plate-like projections 56 are arranged in at least one of these regions, and the noise reduction effect is improved only in the portion where the plate-like projections 56 are arranged. Also good.

  Moreover, you may employ | adopt the structure which arranges a plate-shaped protrusion in the flat plate opposing area 38 shown in FIG. That is, the plate-like protrusions are arranged in at least one of the region between the upper inner surface of the unit case 26 and the positive electrode bus bar 30P or the region between the lower inner surface of the unit case 26 and the negative electrode bus bar 30N. And the capacity of the line bypass capacitor may be increased. Further, a plate-like protrusion may be arranged in a region between the positive electrode bus bar 30P and the negative electrode bus bar 30N, and the capacitance of the line capacitor may be increased.

  In the above description, the configuration in which the positive electrode bus bar 30P and the negative electrode bus bar 30N have the flat plate facing section 38 and the capacitances of the line capacitor and the line bypass capacitor are increased in the flat plate facing section 38 has been described. This invention is good also as a structure by which a flat plate opposing area is formed about three or more bus bars. There are three or more bus bars that transmit multiphase AC power. In this case, in the flat plate facing section, the plurality of bus bars are arranged so that the plate surfaces of the adjacent bus bars face each other. Among the plurality of bus bars, the bus bar close to the inner surface of the unit case is arranged with the plate surface of the flat plate section facing the inner surface of the unit case. Further, a plurality of bus bars may be passed through a conductor cylinder such as the conductor cylinder 48 described above. Even when the flat plate facing section is formed for three or more bus bars, as shown in FIGS. 5 and 6, plate-like protrusions may be arranged on each bus bar and the inner surface of the unit case or the inner wall of the conductor tube. .

  DESCRIPTION OF SYMBOLS 10 Power supply system for vehicle installation, 12 Secondary battery, 14 Power cable, 16 Cable connector, 18 Electrical circuit unit, 20 1st power circuit, 22 2nd power circuit, 24 Buck converter circuit, 26 Unit case, 28 Buck converter Connector, 30P positive bus bar, 30N negative bus bar, 32P first positive bus bar, 32N first negative bus bar, 34P second positive bus bar, 34N second negative bus bar, 36P third positive bus bar, 36N third negative bus bar, 38 , 40P, 40N connector connection end, 42P, 42N connector mounting hole, 44P, 44N conductor piece, 46P, 46N, 52 screw hole, 48 conductor tube, 50 band metal fitting, 54 inner surface of unit case, 56 plate-like projection.

Claims (8)

An electric circuit unit for transferring power to and from a power storage means for storing power;
A plurality of power transmission lines each connecting a plate section formed in a plate shape, connecting the power storage means and the electric circuit unit;
With
The power supply system for mounting on a vehicle, wherein the plurality of power transmission lines are arranged such that plate surfaces of flat plate sections of adjacent power transmission lines face each other. The on-vehicle power supply system according to claim 1,
The electric circuit unit is:
A plurality of electric circuits each for transferring power to and from the power storage means,
Each of the plurality of power transmission lines has a branch section in which one end of a flat plate section is connected to the power storage means and branches from the flat plate section to each electric circuit,
The vehicle-mounted power supply system, wherein the plurality of power transmission lines are arranged such that plate surfaces of flat plate sections of adjacent power transmission lines face each other on the power storage means side with respect to each branch section. In the vehicle-mounted power supply system according to claim 1 or 2,
A conductive unit case that houses at least one of the plurality of electric circuits and a part of the plurality of power transmission lines;
Of the plurality of power transmission lines, the power transmission line close to the inner surface of the unit case is disposed with the plate surface of the flat plate section facing the inner surface of the unit case. Supply system. In the vehicle-mounted power supply system according to claim 3,
A plurality of protrusions are arranged on each of the inner surface of the unit case and the plate surface of the flat plate section facing the inner surface,
The vehicle-mounted power supply system, wherein the plurality of protrusions arranged on the plate surface of the flat plate section and the plurality of protrusions arranged on the inner surface of the unit case are positioned so as to enter each other. . In the vehicle-mounted power supply system according to claim 1 or 2,
A conductor tube through which each flat plate section of the plurality of power transmission lines penetrates;
A conductive unit case that houses at least one of the plurality of electric circuits, a part of the plurality of power transmission lines, and the conductor tube;
With
The on-vehicle power supply system, wherein the conductor cylinder is conductively connected to the unit case. In the vehicle-mounted power supply system according to claim 5,
A vehicle-mounted power supply system comprising a dielectric member filled between an inner surface of the conductor tube and each flat plate section of the plurality of power transmission lines. In the vehicle-mounted power supply system according to claim 5 or 6,
A plurality of protrusions are arranged on each of the inner surface of the conductor tube and the plate surface of the flat plate section facing the inner surface,
The vehicle-mounted power supply system, wherein the plurality of protrusions arranged on the plate surface of the flat plate section and the plurality of protrusions arranged on the inner surface of the conductor cylinder are positioned so as to enter each other. . In the vehicle-mounted power supply system according to any one of claims 1 to 7,
A plurality of protrusions are arranged on each of two plate surfaces facing each other in adjacent plate sections,
A vehicle-mounted power supply system, wherein a plurality of protrusions arranged on one plate surface and a plurality of protrusions arranged on the other plate surface are positioned so as to enter each other.

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