JP7470546B2 - Power System - Google Patents

Description

The present invention relates to a power supply system.

One example of an invention for power supply within a vehicle is the power supply network disclosed in Patent Document 1. In a first embodiment, this power supply network has a configuration in which power is supplied from a battery in the rear of the vehicle to two fuse-relay blocks in the front, with power being supplied from the battery to one fuse-relay block via the other fuse-relay block, and in a second embodiment, power is supplied directly from the battery to each fuse-relay block.

JP 2003-137044 A

When an electrical device that requires a large current is driven, a voltage drop occurs in the power line that supplies power. If a voltage drop occurs in the power line that supplies power, other electrical devices that receive power from the same power line cannot operate stably, and for example, malfunctions may occur in electrical devices that require a constant voltage to operate.

The present invention has been made in consideration of the above, and aims to provide a technology that uses a simple configuration to supply power to electrical equipment that requires a constant voltage while suppressing voltage drops.

To solve the above-mentioned problems and achieve the object, a power supply system according to one aspect of the present invention includes a first wiring path that supplies power supplied from a power supply to a first electrical component that requires a current equal to or greater than a predetermined current value among a plurality of electrical components of a vehicle, and a second wiring path that supplies power supplied from the power supply to a second electrical component that requires constant voltage operation among the plurality of electrical components.

The power supply system according to one aspect of the present invention is characterized in that it includes a distribution unit that is connected to the power supply and distributes the power supplied from the power supply to the first wiring path and the second wiring path.

The power supply system according to one aspect of the present invention is characterized in that the first wiring path extends from the distribution unit to the rear of the vehicle.

The power supply system according to one aspect of the present invention is characterized in that the first wiring path has a first right path that runs from the distribution unit through the right part of the vehicle to the right rear part, and a first left path that runs from the distribution unit through the left part of the vehicle to the left rear part.

The power supply system according to one aspect of the present invention has a third wiring path that supplies the power supplied from the distribution unit to a third electrical component that is disposed in the rear of the vehicle among the plurality of electrical components, the first wiring path passes through either the right or left part of the vehicle to the rear of the vehicle, and the second wiring path reaches the center of the vehicle in the left-right direction.

The power supply system according to one aspect of the present invention is characterized in that the first wiring path passes through the right or left part of the vehicle to the rear of the vehicle, supplies power to a third electrical component disposed in the rear of the vehicle via a booster that boosts the voltage, and the second wiring path reaches the center of the vehicle in the left-right direction.

The power supply system according to one aspect of the present invention includes a distribution unit connected to the power supply and distributing the power supplied from the power supply to a first path leading to the right side of the vehicle and a second path leading to the left side of the vehicle, a first electrical connection box provided on the first path and supplying power to the electrical equipment, and a second electrical connection box provided on the second path and supplying power to the electrical equipment, the first wiring path including a path from one of the first electrical connection box or the second electrical connection box to the rear of the vehicle, and the second wiring path including a path from the distribution unit to the other of the first electrical connection box and the second electrical connection box.

The power supply system according to one aspect of the present invention includes a distribution unit connected to the power supply and distributing the power supplied from the power supply to a first path leading to the right side of the vehicle and a second path leading to the left side of the vehicle, a first electrical connection box provided on the first path and supplying power to the electrical equipment, a second electrical connection box provided on the second path and supplying power to the electrical equipment, and a third electrical connection box providing power to the second electrical equipment, the first wiring path including a path from either the first electrical connection box or the second electrical connection box to the rear of the vehicle, and the second wiring path including a path from the other of the first electrical connection box and the second electrical connection box to the third electrical connection box.

The power supply system according to one aspect of the present invention includes a distribution unit connected to the power supply and distributing the power supplied from the power supply to a first path leading to the right side of the vehicle and a second path leading to the left side of the vehicle, a first electrical connection box provided on the first path and supplying power to the electrical equipment, a second electrical connection box provided on the second path and supplying power to the electrical equipment, and a third electrical connection box providing power to the second electrical equipment, the first wiring path extending from either the first electrical connection box or the second electrical connection box to the rear of the vehicle and supplying power to a third electrical equipment arranged in the rear of the vehicle via a boost unit that boosts the voltage, and the second wiring path including a path extending from the other of the first electrical connection box and the second electrical connection box to the third electrical connection box.

The present invention has the effect of supplying power to electrical equipment that requires a constant voltage while suppressing voltage drops with a simple configuration.

FIG. 1 is a diagram showing wiring of a power supply system according to a first embodiment. FIG. 2 is a plan view illustrating the wiring of the power supply system according to the first embodiment. FIG. 3 is a plan view showing a schematic arrangement of wiring in the power supply system according to the second embodiment. FIG. 4 is a plan view showing a schematic arrangement of wiring in a power supply system according to the third embodiment. FIG. 5 is a plan view showing a schematic arrangement of wiring in a power supply system according to the fourth embodiment. FIG. 6 is a plan view showing a schematic arrangement of wiring in a power supply system according to a fifth embodiment. FIG. 7 is a plan view showing a schematic arrangement of wiring in a power supply system according to the sixth embodiment. FIG. 8 is a plan view showing a schematic arrangement of wiring in a power supply system according to the seventh embodiment. FIG. 9 is a plan view showing a schematic arrangement of wiring in a power supply system according to the eighth embodiment. FIG. 10 is a plan view illustrating the wiring of a power supply system according to a modified example of the eighth embodiment.

The following describes in detail an embodiment of the present invention with reference to the drawings. Note that the present invention is not limited to the embodiment described below. In addition, in the drawings, the same or corresponding elements are appropriately designated by the same reference numerals.

[First embodiment]
Fig. 1 is a diagram showing an example of wiring of a power supply system 1A according to a first embodiment of the present invention in a vehicle 2. Fig. 2 is a plan view showing a schematic diagram of wiring of the power supply system 1A in a vehicle 2. In the following description, the forward direction of the vehicle 2 is referred to as the front side, the backward direction of the vehicle 2 is referred to as the rear side, the right side when looking forward from the driver's seat is referred to as the right side, and the left side when looking forward from the driver's seat is referred to as the left side.

The power supply system 1A is a system that supplies power from a secondary battery BAT possessed by the vehicle 2 to multiple electrical components possessed by the vehicle 2. The power supply system 1A has a distribution unit FM, multiple electrical connection boxes, and multiple cables. The secondary battery BAT is a secondary battery that can be repeatedly charged and discharged. The voltage of the secondary battery BAT is, for example, 12V, and it is charged by an alternator (not shown) possessed by the vehicle 2 and supplies power to multiple electrical components. The position of the secondary battery BAT is not limited to the position shown in the figure, and it may be disposed in another position within the vehicle 2.

The electrical equipment to which power is supplied by the power supply system 1A includes, for example, lighting equipment such as headlamps, tail lamps, stop lamps, and turn lamps, equipment around the driver's seat such as a display device, car audio, and an instrument panel, equipment such as power windows, wipers, seat heaters, door locks, electric mirrors, rear defrosters, and rear wipers, actuators, ECUs (Electronic Control Units), and various sensors. Note that in order to prevent the drawing from becoming too complicated, multiple electrical equipment is omitted from FIG. 1. In FIG. 2, in order to prevent the drawing from becoming too complicated, electrical equipment 10 ₁ to 10 _n (n is an integer of 2 or more) and electrical equipment 30 ₁ to 30 _m (m is an integer of 2 or more) are illustrated, and other electrical equipment is omitted from illustration. In addition, in the vehicle 2, communication cables are arranged so that the ECU can communicate with various electrical equipment, but are omitted from illustration in order to prevent the drawing from becoming too complicated.

The power supply system 1A has multiple cables, namely, cable BW, cable RW, cable LW, cable RW1, cable LW1, cable RW12, and cable LW11. These cables are large-diameter cables for supplying power to each electrical component arranged in the vehicle 2. These cables may be, for example, flat electric wires in the form of twisted wires, flat electric wires, round electric wires, or combinations of these electric wires.

The distribution unit FM is connected to the secondary battery BAT via a cable BW. In addition, a cable RW and a cable LW are connected to the distribution unit FM. The cable RW is a cable for supplying power to an electrical junction box arranged on the right side of the vehicle 2, and the cable LW is a cable for supplying power to an electrical junction box arranged on the left side of the vehicle 2. Within the distribution unit FM, the cable RW is electrically connected to the cable BW, and the cable LW is electrically connected to the cable BW. It is preferable that the distribution unit FM is arranged in a position close to the secondary battery BAT.

The power supply system 1A has a plurality of electrical junction boxes, namely electrical junction box FR, electrical junction box FL, electrical junction box RCV, electrical junction box ML, electrical junction box CUR, and electrical junction box RR. These electrical junction boxes have terminals to which the aforementioned cables for supplying power are connected, terminals to which cables that connect electrical equipment and the electrical junction box and supply power to the electrical equipment are connected, a control unit that controls the power supply to the electrical equipment, a relay circuit, a fuse, a switching circuit, a smoothing circuit, etc. These electrical junction boxes may have a switch function that electrically connects or disconnects the connected cables.

The electrical junction box FR is located on the front right side of the vehicle 2, and is connected to the cable RW. The electrical junction box FR is electrically connected to electrical equipment located, for example, in the front of the vehicle 2, and supplies power supplied from the cable RW to the connected electrical equipment. In addition, the electrical junction box FR is connected to a cable RW1 located on the right side of the vehicle 2. Inside the electrical junction box FR, the cable RW and the cable RW1 are electrically connected.

The electrical connection box FL is located on the front left side of the vehicle 2, and is connected to the cable LW. The electrical connection box FL is electrically connected to electrical equipment located, for example, in the front of the vehicle 2, and supplies power supplied from the cable LW to the connected electrical equipment. In addition, the electrical connection box FL is connected to a cable LW1 located on the left side of the vehicle 2. Inside the electrical connection box FL, the cable LW and the cable LW1 are electrically connected.

The electrical junction box RCV is disposed near the cowl on the right side of the vehicle 2, and the cable RW1 is connected to a cable RW12 disposed on the right side of the vehicle 2. The cables RW1 and RW12 are electrically connected inside the electrical junction box RCV. The electrical junction box RCV is electrically connected to m electrical components 30 ₁ to 30 _m via cables EW3, and supplies power supplied from the cable RW1 to the connected electrical components 30 ₁ to 30 _m .

The electrical components 30 ₁ to 30 _m are examples of second electrical components that require constant voltage drive, such as audio equipment, display devices, instrument panels, etc., whose output is perceived visually or audibly. Note that since Fig. 2 is a diagram showing wiring diagrams, the actual positions of the electrical components 30 ₁ to 30 _m may differ from those shown in Fig. 2.

The electrical connection box ML is located near the cowl on the left side of the vehicle 2, and cable LW1 is connected to cable LW11 located on the left side of the vehicle 2. Cable LW1 and cable LW11 are electrically connected inside the electrical connection box ML. The electrical connection box ML is electrically connected to electrical equipment located, for example, near the cowl or between the front and rear of the vehicle 2, and supplies power supplied from cable LW1 to the connected electrical equipment.

The electrical junction box CUR is disposed on the left rear side of the vehicle 2, and is connected to a cable LW11. The electrical junction box CUR is electrically connected to n electrical components 10 ₁ to 10 n disposed, for example, at the rear of the vehicle 2, via a cable EW1, and supplies power provided from the cable LW11 to the connected electrical components 10 ₁ to _{10 n} .

The electrical components 10 ₁ to 10 _n are examples of first electrical components that require a large current equal to or greater than a predetermined current value for operation, such as a rear defroster, a rear wiper, a rear washer, an actuator, etc. The predetermined current value is set according to, for example, the type of vehicle 2 and the number of electrical components included in the vehicle 2. Note that Fig. 2 is a diagram that shows the wiring diagrammatically, and therefore it should be noted that the actual positions of the electrical components 10 ₁ to 10 _n differ from the positions shown in Fig. 2.

The electrical connection box RR is located on the right rear side of the vehicle 2, and is connected to the cable RW12. The electrical connection box RR is electrically connected to electrical equipment for the lighting system, for example, located at the rear of the vehicle 2, and supplies power from the cable RW12 to the connected electrical equipment.

The power supply system 1A supplies power to the electrical components _10-1 to 10- _n that require a large current to operate from the secondary battery BAT via a cable BW and a distribution box FM, and further via a cable LW, an electrical junction box FL, a cable LW1, an electrical junction box ML, a cable LW11, and an electrical junction box CUR that are arranged on the left side of the vehicle 2. The cable LW, the electrical junction box FL, the cable LW1, the electrical junction box ML, the cable LW11, and the electrical junction box CUR are an example of a first wiring path that supplies power to the first electrical components.

Furthermore, the power supply system 1A supplies power to the electrical components _30-1 to 30- _m , which are electrical components that require constant voltage operation, from the secondary battery BAT via a cable BW and a distribution box FM, and further via a cable RW, an electrical junction box FR, a cable RW1, and an electrical junction box RCV that are arranged on the right side of the vehicle 2. The cable RW, the electrical junction box FR, the cable RW1, and the electrical junction box RCV are an example of a second wiring path that supplies power to the second electrical components.

For example, in a configuration in which power is supplied from a secondary battery BAT in the front of the vehicle 2 to electrical equipment _30-1 to electrical equipment 30- _m (second electrical equipment) and to electrical equipment _10-1 to electrical equipment 10 _-n (first electrical equipment) in the rear of the vehicle 2 via the same cable, when the first electrical equipment is driven and a large current flows, a voltage drop will occur, causing the second electrical equipment, such as a display device or instrument panel, to experience phenomena such as a decrease in brightness or being reset, and the second electrical equipment, such as an audio device, to experience problems such as audio interruption or being reset.

In contrast, in the power supply system 1A, a first wiring path that supplies power to the electrical components 10 ₁ to 10 _n (first electrical components) and a second wiring path that supplies power to the electrical components 30 ₁ to 30 _m (second electrical components) are separated. Therefore, even if a voltage drop occurs in the first wiring path due to the operation of the first electrical component, the voltage drop in the second wiring path, which is separate from the first wiring path, is suppressed, so that power can be stably supplied to the second electrical component, and the occurrence of malfunctions in the second electrical component that requires constant voltage operation can be suppressed.

Note that the power supply system 1A may be configured so that power is supplied to the first electrical component from an electrical junction box on the right side of the vehicle 2, and power is supplied to the second electrical component from an electrical junction box on the left side of the vehicle 2. For example, cable EW3 may be connected to electrical junction box ML, and cable EW1 may be connected to electrical junction box RR. In this configuration, power is supplied to the first electrical component via cable RW, electrical junction box FR, cable RW1, electrical junction box RCV, and electrical junction box RR, and power is supplied to the second electrical component via cable LW, electrical junction box FL, cable LW1, and electrical junction box ML. In this configuration as well, the path for supplying power to the first electrical component and the path for supplying power to the second electrical component are separate. Therefore, even if a voltage drop occurs in the path that supplies power to the first electrical component due to the operation of the first electrical component, the voltage drop in the path that supplies power to the second electrical component is suppressed, and power is supplied stably to the second electrical component, thereby suppressing the occurrence of malfunctions in the second electrical component that requires constant voltage operation.

[Second embodiment]
Next, a second embodiment of the present invention will be described. FIG. 3 is a plan view showing the wiring of the power supply system 1B according to the second embodiment in the vehicle 2. The second embodiment differs from the first embodiment in the wiring for supplying power to the first electrical component and the wiring for supplying power to the second electrical component. Therefore, in the following description, the same components as those in the first embodiment are denoted by the same reference numerals and description is omitted, and differences from the first embodiment will be described. Note that FIG. 3 is a diagram showing the wiring diagram, and therefore the actual positions of the electrical components 10 ₁ to 10 _n and the electrical components 30 ₁ to 30 _m are different from the positions shown in FIG. 3.

The power supply system 1B has a cable LW2, and has a cable LW12 instead of the cable LW11. The power supply system 1B also has an electrical connection box LCV instead of the electrical connection box ML as an electrical connection box for supplying power to the second electrical equipment, and has an electrical connection box RR and an electrical connection box RL as electrical connection boxes for supplying power to the electrical equipment in the rear of the vehicle 2.

Cable LW2 is connected to the distribution unit FM. Within the distribution unit FM, cable BW and cable LW2 are electrically connected.

The electrical junction box CUR is located in the left-right center at the rear of the vehicle 2, and the electrical junction box CUR, to which the cable LW2 is connected, supplies power from the cable LW2 to the electrical components _10-1 to 10 _-n , which are connected by the cable EW1.

The electrical connection box RL is located on the left rear side of the vehicle 2, and is connected to the cable LW12. The electrical connection box RL is electrically connected to, for example, electrical equipment for the lighting system located on the left rear side of the vehicle 2, and supplies power from the cable LW12 to the connected electrical equipment.

The electrical junction box RCV is disposed near the cowl on the right side of the vehicle 2. The electrical junction box RCV is electrically connected by a cable EW3 to electrical components _30-1 and _30-2 , which are second electrical components close to the electrical junction box RCV, and supplies power supplied from a cable RW1 to the connected electrical components _30-1 and _30-2 .

The electric junction box LCV is disposed near the cowl on the left side of the vehicle 2. The electric junction box LCV is electrically connected by a cable EW4 to the electric component 30 _m-1 , the electric component 30 _m , etc., which are second electric components close to the electric junction box LCV, and supplies power supplied from the cable LW1 to the connected electric components 30 _m-1 , 30 _m , etc.

The power supply system 1B supplies power to a first electrical component located at the rear of the vehicle 2 from the secondary battery BAT via a cable BW and a distribution box FM, and further via a cable LW2 and an electrical junction box CUR. The cable LW2 and the electrical junction box CUR are an example of a first wiring path that supplies power to the first electrical component.

Furthermore, the power supply system 1B supplies power to the second electrical components, such as the electrical components _30-1 and _30-2 , from the secondary battery BAT via a cable BW and a distribution box FM, and further via a cable RW, an electrical junction box FR, a cable RW1, and an electrical junction box RCV arranged on the right side of the vehicle 2. The cable RW, the electrical junction box FR, the cable RW1, and the electrical junction box RCV are an example of a second wiring path that supplies power to the second electrical components.

Furthermore, the power supply system 1B supplies power to the second electrical components, such as electrical components 30 _m-1 and 30 _m , from the secondary battery BAT via a cable BW and a distribution box FM, and further via a cable LW, an electrical junction box FL, a cable LW1, and an electrical junction box LCV arranged on the left side of the vehicle 2. The cable LW, the electrical junction box FL, the cable LW1, and the electrical junction box LCV are an example of a second wiring path that supplies power to the second electrical components.

In the power supply system 1B, the wiring paths that supply power to the electrical components of the vehicle 2 are also separated into a first wiring path that supplies power to the first electrical component and a second wiring path that supplies power to the second electrical component. Therefore, even if a voltage drop occurs in the first wiring path due to the operation of the first electrical component, the voltage drop in the second wiring path, which is separate from the first wiring path, is suppressed, and power is stably supplied to the second electrical component, thereby suppressing the occurrence of malfunctions in the second electrical component that requires constant voltage operation.

In addition, in the power supply system 1B, as shown by the dashed line in FIG. 3, the distribution unit FM and the electrical connection box CUR may be connected by a cable RW2 arranged on the right side of the vehicle 2, and the electrical connection box CUR may supply the power supplied from the cable RW2 to the first electrical component. In addition, in the power supply system 1B, the electrical connection box CUR may be arranged on the rear right side of the vehicle 2 or the rear left side of the vehicle 2.

[Third embodiment]
Next, a third embodiment of the present invention will be described. FIG. 4 is a plan view showing the wiring of the power supply system 1C according to the third embodiment in the vehicle 2. The third embodiment differs from the first and second embodiments in the wiring for supplying power to the first and second electrical components. Therefore, in the following description, the same components as those in the first and second embodiments are denoted by the same reference numerals and are not described, and only the characteristic features of the third embodiment will be described. Note that FIG. 4 is a diagram showing the wiring diagram, and therefore the actual positions of the electrical components 10 ₁ to 10 _n and the electrical components 30 ₁ to 30 _m are different from the positions shown in FIG. 4.

Power supply system 1C differs from power supply system 1B in that it has cable RW2. Also, power supply system 1C differs from power supply system 1B in that it has electrical connection box LCUR and electrical connection box RCUR instead of electrical connection box CUR as electrical connection boxes for supplying power to the first electrical component.

Cable RW2 is connected to the distribution unit FM. Within the distribution unit FM, cable BW and cable RW2 are electrically connected.

The electrical junction box LCUR is disposed on the left rear side of the vehicle 2, and is connected to a cable LW2. The electrical junction box LCUR is electrically connected to, for example, electrical components _10-1 and _10-2 , which are first electrical components disposed on the left rear side of the vehicle 2, via a cable EW11, and supplies power supplied from the cable LW2 to the connected electrical components _10-1 and _10-2 .

The electrical junction box RCUR is disposed on the right rear side of the vehicle 2, and is connected to a cable RW2. The electrical junction box RCUR is electrically connected to, for example, an electrical component 10 _n-1 or an electrical component 10 _n , which is a first electrical component disposed on the right rear side of the vehicle 2, via a cable EW12, and supplies power supplied from the cable RW2 to the connected electrical components 10 _n-1 and 10 _n .

The power supply system 1C supplies power to the second electrical equipment via the same second wiring path as the power supply system 1B. The power supply system 1C also supplies power to the first electrical equipment connected to the electrical junction box LCUR from the secondary battery BAT via the cable BW and the distribution box FM, and further via the cable LW2 and the electrical junction box LCUR. The cable LW2 and the electrical junction box LCUR are an example of the first wiring path and the first left path that supply power to the first electrical equipment. The power supply system 1C also supplies power to the first electrical equipment connected to the electrical junction box RCUR from the secondary battery BAT via the cable BW and the distribution box FM, and further via the cable RW2 and the electrical junction box RCUR. The cable RW2 and the electrical junction box RCUR are an example of the first wiring path and the first right path that supply power to the first electrical equipment.

In the power supply system 1C, the wiring paths that supply power to the electrical components of the vehicle 2 are also separated into a first wiring path that supplies power to the first electrical component and a second wiring path that supplies power to the second electrical component. Therefore, even if a voltage drop occurs in the first wiring path due to the operation of the first electrical component, the voltage drop in the second wiring path, which is separate from the first wiring path, is suppressed, and power is stably supplied to the second electrical component, thereby suppressing the occurrence of malfunctions in the second electrical component that requires constant voltage operation.

In addition, in power supply system 1C, there are two first wiring paths that supply power to the first electrical equipment in the rear of vehicle 2. This makes it possible to reduce the diameter of the cable that constitutes the first wiring path compared to power supply system 1A and power supply system 1B, which supply power to the first electrical equipment in the rear of vehicle 2 through a single first wiring path. By reducing the diameter of the cable, the degree of freedom in wiring can be increased.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described. FIG. 5 is a plan view showing the wiring of the power supply system 1D according to the fourth embodiment in the vehicle 2. The fourth embodiment differs from the first to third embodiments in the wiring for supplying power to the first electrical component and the wiring for supplying power to the second electrical component. Therefore, in the following description, the same components as those in the first to third embodiments are denoted by the same reference numerals and are not described, and only the characteristic points of the fourth embodiment will be described. Note that FIG. 5 is a diagram showing the wiring diagram, and therefore the actual positions of the electrical components 10 ₁ to 10 _n and the electrical components 30 ₁ to 30 _m are different from the positions shown in FIG. 5.

Compared to power supply system 1B, power supply system 1D has an electrical junction box ML instead of electrical junction box LCV, and a cable LW11 instead of cable LW2. Cable LW11 is connected to electrical junction box ML. Within electrical junction box ML, cables LW1 and LW11 are electrically connected. In this embodiment, electrical junction box RCV is an example of a first electrical junction box, and electrical junction box ML is an example of a second electrical junction box. Additionally, the path of cable RW, electrical junction box FR, and cable RW1 is an example of a first path, and the path of cable LW, electrical junction box FL, and cable LW1 is an example of a second path.

The electric junction box CUR is disposed at the center in the left-right direction at the rear of the vehicle 2, and is connected to a cable LW11. The electric junction box CUR is electrically connected to the electric components 10 ₁ to 10 _n , which are the first electric components, by a cable EW1, and supplies power supplied from the cable LW11 to the connected electric components 10 ₁ to 10 _n .

The power supply system 1D supplies power to the first electrical component from the secondary battery BAT via the cable BW and the distribution box FM, and further via the cable LW1, the electrical connection box ML, the cable LW11, and the electrical connection box CUR. The cable LW, the electrical connection box FL, the cable LW1, the electrical connection box ML, the cable LW11, and the electrical connection box CUR are an example of a first wiring path that supplies power to the first electrical component. The power supply system 1D also supplies power to the second electrical component via the same path as the power supply system 1A. The power supply system 1D also supplies power to an electrical component other than the first electrical component and the second electrical component, that is located in the rear of the vehicle 2 (a third electrical component), via a path (a third wiring path) that includes the cable LW, the electrical connection box FL, the cable LW1, the electrical connection box ML, the cable LW12, and the electrical connection box RL.

In the power supply system 1D, the wiring paths that supply power to the electrical components of the vehicle 2 are also separated into a first wiring path that supplies power to the first electrical component and a second wiring path that supplies power to the second electrical component. Therefore, even if a voltage drop occurs in the first wiring path, cable LW11, due to the operation of the first electrical component, the voltage drop in the second wiring path, cable RW1, which is separate from the first wiring path, is suppressed, and power is stably supplied to the second electrical component, thereby suppressing the occurrence of malfunctions in the second electrical component that requires constant voltage operation.

In addition, compared to power supply system 1B, which connects distribution unit FM and electrical connection box CUR with cable LW2, power supply system 1D connects electrical connection box CUR to electrical connection box ML, which is closer to distribution unit FM, so the length of the cable supplying power to electrical connection box CUR can be shortened and the weight of the entire cable can be reduced.

In addition, the power supply system 1D may be configured to supply power to the first electrical equipment via an electrical junction box on the right side of the vehicle 2, and to supply power to the second electrical equipment via an electrical junction box on the left side of the vehicle 2. For example, the cable EW3 may be connected to the electrical junction box ML, and the electrical junction box CUR may be connected to the electrical junction box RCV via the cable RW11 shown by the dashed line in FIG. 5. In this configuration, power is supplied to the first electrical equipment via the cable RW, the electrical junction box FR, the cable RW1, the electrical junction box RCV, the cable RW11, and the electrical junction box CUR, and power is supplied to the second electrical equipment via the cable LW, the electrical junction box FL, the cable LW1, and the electrical junction box ML. Even in this configuration, the wiring path for supplying power to the electrical equipment of the vehicle 2 is divided into a path for supplying power to the first electrical equipment and a path for supplying power to the second electrical equipment. Therefore, even if a voltage drop occurs in the path that supplies power to the first electrical component due to the operation of the first electrical component, the voltage drop in the path that supplies power to the second electrical component is suppressed, and power is supplied stably to the second electrical component, thereby suppressing the occurrence of malfunctions in the second electrical component that requires constant voltage operation.

[Fifth embodiment]
Next, a fifth embodiment of the present invention will be described. FIG. 6 is a plan view showing the wiring of the power supply system 1E according to the fifth embodiment in the vehicle 2. The fifth embodiment differs from the first to fourth embodiments in the wiring for supplying power to the first electrical component and the wiring for supplying power to the second electrical component. Therefore, in the following description, the same components as those in the first to fourth embodiments are denoted by the same reference numerals and are not described, and only the characteristic points of the fifth embodiment will be described. Note that FIG. 6 is a diagram showing the wiring diagram, and therefore the actual positions of the electrical components 10 ₁ to 10 _n and the electrical components 30 ₁ to 30 _m are different from the positions shown in FIG. 6.

Power supply system 1E differs from power supply system 1D in that it has an electrical connection box MR instead of an electrical connection box RCV, and has an electrical connection box CV.

The electrical junction box MR is located near the cowl on the right side of the vehicle 2, and is connected to the cable RW1. The electrical junction box MR is electrically connected to electrical equipment located, for example, near the cowl or between the front and rear of the vehicle 2, and supplies power from the cable RW1 to the connected electrical equipment. In addition, the electrical junction box MR is connected to a cable RW11 located on the right side of the vehicle 2. Inside the electrical junction box MR, the cables RW1 and RW11 are electrically connected.

The electrical junction box CUR is disposed on the right rear side of the vehicle 2, and is connected to a cable RW11. The electrical junction box CUR is electrically connected to n electrical components 10 ₁ to 10 _n disposed in the rear of the vehicle 2 via a cable EW1, and supplies power provided from the cable RW11 to the connected electrical components 10 ₁ to 10 _n .

The electric junction box CV is disposed at the center in the left-right direction at the front of the vehicle 2, and is connected to the cable W1. The electric components _30-1 to 30- _m are electrically connected to the electric junction box CV via the cable EW3. The electric junction box CV supplies power supplied from the cable W1 to the connected electric components _30-1 to 30- _m .

The power supply system 1E supplies power to the first electrical equipment from the secondary battery BAT via a cable BW and a distribution box FM, and further via a cable RW, an electrical connection box FR, a cable RW1, an electrical connection box MR, a cable RW11, and an electrical connection box CUR, which are arranged on the right side of the vehicle 2. The cable RW, the electrical connection box FR, the cable RW1, the electrical connection box MR, the cable RW11, and the electrical connection box CUR are an example of a first wiring path that supplies power to the first electrical equipment.

The power supply system 1E also supplies power to the second electrical equipment from the secondary battery BAT via a cable BW and a distribution box FM, and further via a cable W1 and an electrical junction box CV. The cable W1 and the electrical junction box CV are an example of a second wiring path that supplies power to the second electrical equipment.

The power supply system 1E also supplies power to an electrical component (third electrical component) other than the first electrical component and the second electrical component that is located in the rear of the vehicle 2 via a path (third wiring path) including cable LW, electrical connection box FL, cable LW1, electrical connection box ML, cable LW12, and electrical connection box RL.

In the power supply system 1E, the wiring paths that supply power to the electrical components of the vehicle 2 are also separated into a first wiring path that supplies power to the first electrical component and a second wiring path that supplies power to the second electrical component. Therefore, even if a voltage drop occurs in the first wiring path due to the operation of the first electrical component, the voltage drop in the second wiring path, which is separate from the first wiring path, is suppressed, and power is stably supplied to the second electrical component, thereby suppressing the occurrence of malfunctions in the second electrical component that requires constant voltage operation.

The power supply system 1E may be configured to supply power to the first electrical equipment via an electrical junction box located on the left side of the vehicle 2. For example, the electrical junction box CUR is disposed on the rear left side of the vehicle 2 and connected to the electrical junction box ML via a cable LW11, and the electrical junction box RR is connected to the electrical junction box MR via a cable RW12. In this configuration, power is supplied to the first electrical equipment via the cable LW, the electrical junction box FL, the cable LW1, the electrical junction box ML, the cable LW11, and the electrical junction box CUR. Even in this configuration, the wiring path for supplying power to the electrical equipment of the vehicle 2 is separated into a path for supplying power to the first electrical equipment and a path for supplying power to the second electrical equipment. Therefore, even if a voltage drop occurs in the path for supplying power to the first electrical equipment due to the operation of the first electrical equipment, the voltage drop in the path for supplying power to the second electrical equipment is suppressed, and power is stably supplied to the second electrical equipment, and the occurrence of malfunctions in the second electrical equipment that requires constant voltage operation can be suppressed.

Sixth Embodiment
Next, a sixth embodiment of the present invention will be described. FIG. 7 is a plan view showing the wiring of the power supply system 1F according to the sixth embodiment in the vehicle 2. The sixth embodiment differs from the first to fifth embodiments in the wiring for supplying power to the first electrical component and the wiring for supplying power to the second electrical component. Therefore, in the following description, the same components in the sixth embodiment as those in the first to fifth embodiments are given the same reference numerals and are not described, and the following description focuses on the characteristic features of the sixth embodiment. Note that FIG. 7 is a diagram showing the wiring diagram, and therefore the actual positions of the electrical components 10 ₁ to 10 _n and the electrical components 30 ₁ to 30 _m are different from the positions shown in FIG. 7.

The power supply system 1G differs from the power supply system 1E of the fifth embodiment in that it does not have a cable LW12 and an electrical connection box RL. The electrical connection box CUR supplies power not only to the first electrical component, but also to an electrical component (third electrical component) other than the first electrical component that is located at the rear of the vehicle 2.

The power supply system 1F supplies power to a first electrical component located at the rear of the vehicle 2 via the same first wiring path as the power supply system 1E. The power supply system 1F also supplies power to a second electrical component via the same second wiring path as the power supply system 1E.

In the power supply system 1F, the wiring paths that supply power to the electrical components of the vehicle 2 are also separated into a first wiring path that supplies power to the first electrical component and a second wiring path that supplies power to the second electrical component. Therefore, even if a voltage drop occurs in the first wiring path due to the operation of the first electrical component, the voltage drop in the second wiring path, which is separate from the first wiring path, is suppressed, and power is stably supplied to the second electrical component, thereby suppressing the occurrence of malfunctions in the second electrical component that requires constant voltage operation.

In addition, in the power supply system 1F, there is one path that supplies power to the electrical equipment located at the rear of the vehicle 2, so the number of parts can be reduced compared to a configuration in which there are two paths that supply power to the electrical equipment located at the rear of the vehicle 2.

In addition, in the power supply system 1F, the electrical connection box CUR may be disposed on the rear left side of the vehicle 2, the electrical connection box ML and the electrical connection box CUR may be connected with a cable LW11 instead of the cable RW11, and power may be supplied from the electrical connection box ML to the electrical connection box CUR via the cable LW11.

[Seventh embodiment]
Next, a seventh embodiment of the present invention will be described. FIG. 8 is a plan view showing the wiring of the power supply system 1G according to the seventh embodiment in the vehicle 2. The seventh embodiment differs from the first to sixth embodiments in the wiring for supplying power to the first electrical component and the wiring for supplying power to the second electrical component. Therefore, in the following description, the same components as those in the first to sixth embodiments are denoted by the same reference numerals and description is omitted, and only the characteristic points of the seventh embodiment will be described. Note that FIG. 8 is a diagram showing the wiring diagram, and therefore the actual positions of the electrical components 10 ₁ to 10 _n and the electrical components 30 ₁ to 30 _m are different from the positions shown in FIG. 8.

The power supply system 1G differs from the power supply system 1E in that the electric junction box CV is not connected to the distribution unit FM by the cable W1 but is connected to the electric junction box ML by a cable LW13. The electric junction box CV is an example of a third electric junction box. The cable LW13 is electrically connected to the cable LW1 inside the electric junction box ML. The electric junction box CV supplies the power supplied from the cable LW13 to the electric components _30-1 to 30- _m , which are the second electric components connected to the electric junction box CV.

The power supply system 1G supplies power to the first electrical equipment in the rear of the vehicle 2 via the same first wiring path as the power supply system 1E. The power supply system 1G also supplies power to the second electrical equipment from the secondary battery BAT via cable BW and distribution box FM, and further via cable LW, electrical connection box FL, cable LW1, electrical connection box ML, cable LW13, and electrical connection box CV. Cable LW, electrical connection box FL, cable LW1, electrical connection box ML, cable LW13, and electrical connection box CV are an example of a second wiring path that supplies power to the second electrical equipment.

In the power supply system 1H, the wiring path that supplies power to the electrical equipment of the vehicle 2 is also separated into a second wiring path that supplies power to the second electrical equipment, and a first wiring path that supplies power to the first electrical equipment located in the rear of the vehicle 2. Therefore, even if a voltage drop occurs in the first wiring path due to the operation of the first electrical equipment, the voltage drop in the second wiring path, which is separate from the first wiring path, is suppressed, and power is stably supplied to the second electrical equipment, thereby suppressing the occurrence of malfunctions in the second electrical equipment that requires constant voltage operation.

In addition, in the power supply system 1G, the electrical connection box CUR may be disposed on the rear left side of the vehicle 2, the electrical connection box ML and the electrical connection box CUR may be connected by a cable LW11 instead of the cable RW11, power may be supplied from the electrical connection box ML to the electrical connection box CUR via the cable LW11, and the electrical connection box CV may be connected to the electrical connection box MR by a cable RW13 shown by a dashed line in FIG. 8, and power may be supplied from the electrical connection box MR.

[Eighth embodiment]
Next, an eighth embodiment of the present invention will be described. FIG. 9 is a plan view showing the wiring of the power supply system 1H according to the eighth embodiment in the vehicle 2. The eighth embodiment differs from the first to seventh embodiments in the wiring for supplying power to the first electrical component and the wiring for supplying power to the second electrical component. Therefore, in the following description, the same components in the eighth embodiment as those in the first to seventh embodiments are given the same reference numerals and are not described, and the following description focuses on the characteristic features of the eighth embodiment. Note that FIG. 9 is a diagram showing the wiring diagram, and therefore the actual positions of the electrical components 10 ₁ to 10 _n and the electrical components 30 ₁ to 30 _m are different from the positions shown in FIG. 9.

Compared to power supply system 1G, power supply system 1H differs in that it does not have an electrical connection box RL and a cable LW11, and that the electrical connection box CUR supplies power to electrical equipment other than the first electrical equipment that is located at the rear of the vehicle 2, in addition to the first electrical equipment.

Power supply system 1H supplies power to a first electrical component located in the rear of vehicle 2 via the same first wiring path as power supply systems 1E to 1G. Power supply system 1H also supplies power to a second electrical component via the same second wiring path as power supply system 1G.

In the power supply system 1H, the wiring paths that supply power to the electrical components of the vehicle 2 are also separated into a first wiring path that supplies power to the first electrical component and a second wiring path that supplies power to the second electrical component. Therefore, even if a voltage drop occurs in the first wiring path due to the operation of the first electrical component, the voltage drop in the second wiring path, which is separate from the first wiring path, is suppressed, and power is stably supplied to the second electrical component, thereby suppressing the occurrence of malfunctions in the second electrical component that requires constant voltage operation.

In addition, in the power supply system 1H, there is one path that supplies power to the electrical equipment located at the rear of the vehicle 2, so the number of parts can be reduced compared to a configuration in which there are two paths that supply power to the electrical equipment located at the rear of the vehicle 2.

The configuration for supplying power to the electrical junction box CV and the electrical junction box CUR may be as shown in FIG. 10. FIG. 10 is a plan view showing the wiring in a modified example of the power supply system 1H. As shown in FIG. 10, the electrical junction box CUR may be disposed on the left rear side of the vehicle 2, and power may be supplied from the electrical junction box ML to the electrical junction box CUR via a cable LW11, and power may be supplied from the electrical junction box MR to the electrical junction box CV via a cable RW13.

[Modification]
Although the embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned embodiment and can be implemented in various other forms. For example, the above-mentioned embodiment may be modified as follows to implement the present invention. The above-mentioned embodiment and the following modifications may be combined with each other. The present invention also includes configurations in which the components of the above-mentioned embodiments and modifications are appropriately combined. Further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspects of the present invention are not limited to the above-mentioned embodiment and modifications, and various modifications are possible.

In the above-described embodiments, the electric connection box CUR that supplies electric power to the first electric component is
When power is supplied to electrical components other than the first electrical component, a capacitor for suppressing a voltage drop in a cable for supplying power and a DC/DC converter for suppressing the voltage drop may be provided.

1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H Power supply system 2 Vehicle 10 ₁ to 10 _n electrical equipment 30 ₁ to 30 _m electrical equipment BAT Secondary battery FM Distribution section FR, FL, MR, ML Electrical junction box CUR, LCUR, RCUR Electrical junction box CV, LCV, RCV Electrical junction box BW, RW, LW Cable W1 Cable RW1, RW2, RW11, RW12, RW13 Cable LW1, LW2, LW11, LW12, LW13 Cable EW3, EW4 Cable EW1, EW11, EW12 Cable

Claims (4)

a first wiring path that supplies electric power supplied from a power source to a first electrical component that requires a current equal to or greater than a predetermined current value among a plurality of electrical components included in the vehicle;
a second wiring path that supplies the power from the power source to a second electrical component that is required to be driven at a constant voltage among the plurality of electrical components, and does not supply the power to the first electrical component;
a distribution unit connected to the power source and distributing power supplied from the power source to the first wiring path and the second wiring path;
Equipped with
The first wiring path includes a first right path that passes through a right part of the vehicle from the distribution unit to a right rear part, and a first left path that passes through a left part of the vehicle from the distribution unit to a left rear part.
Power supply system. a first wiring path that supplies electric power supplied from a power source to a first electrical component that requires a current equal to or greater than a predetermined current value among a plurality of electrical components included in the vehicle;
a second wiring path that supplies the power from the power source to a second electrical component that is required to be driven at a constant voltage among the plurality of electrical components, and does not supply the power to the first electrical component;
a distribution unit connected to the power source and distributing power supplied from the power source to a first path leading to a right portion of the vehicle and a second path leading to a left portion of the vehicle;
a first electric connection box provided in the first path and configured to supply electric power to the electrical equipment;
a second electric connection box provided in the second path and configured to supply electric power to the electrical equipment;
Equipped with
the first wiring path includes a path extending from one of the first electrical junction box or the second electrical junction box to a rear part of the vehicle,
The second wiring path includes a path from the distribution unit to the other of the first electric connection box and the second electric connection box.
Power supply system. a first wiring path that supplies electric power supplied from a power source to a first electrical component that requires a current equal to or greater than a predetermined current value among a plurality of electrical components included in the vehicle;
a second wiring path that supplies the power from the power source to a second electrical component that is required to be driven at a constant voltage among the plurality of electrical components, and does not supply the power to the first electrical component;
a distribution unit connected to the power source and distributing power supplied from the power source to a first path leading to a right portion of the vehicle and a second path leading to a left portion of the vehicle;
a first electric connection box provided in the first path and configured to supply electric power to the electrical equipment;
a second electric connection box provided in the second path and configured to supply electric power to the electrical equipment;
a third electric connection box for supplying electric power to the second electric device;
Equipped with
the first wiring path includes a path extending from one of the first electrical junction box or the second electrical junction box to a rear part of the vehicle,
The second wiring path includes a path extending from the other of the first electric junction box and the second electric junction box to the third electric junction box.
Power supply system. a first wiring path that supplies electric power supplied from a power source to a first electrical component that requires a current equal to or greater than a predetermined current value among a plurality of electrical components included in the vehicle;
a second wiring path that supplies the power from the power source to a second electrical component that is required to be driven at a constant voltage among the plurality of electrical components, and does not supply the power to the first electrical component;
a distribution unit connected to the power source and distributing power supplied from the power source to a first path leading to a right portion of the vehicle and a second path leading to a left portion of the vehicle;
a first electric connection box provided in the first path and configured to supply electric power to the electrical equipment;
a second electric connection box provided in the second path and configured to supply electric power to the electrical equipment;
a third electric connection box for supplying electric power to the second electric device;
Equipped with
the first wiring path extends from one of the first electric junction box and the second electric junction box to a rear part of the vehicle, and supplies electric power to a third electric component disposed in the rear part of the vehicle via a boosting unit that boosts a voltage;
The second wiring path includes a path extending from the other of the first electric junction box and the second electric junction box to the third electric junction box.
Power supply system.

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