JP5958695B2 - Vehicle power supply system - Google Patents

Description

  The present invention relates to a vehicle power supply system, and more particularly to a vehicle power supply system that can directly supply power from a vehicle battery to an external device such as a home appliance without using an external facility such as a power supply facility. .

  Conventionally, vehicles such as electric vehicles and hybrid vehicles that supply electric power from a battery to an electric motor and drive wheels by the electric motor are known.

  In recent years, a vehicle power supply system for supplying electric power from a battery to the outside of the vehicle mounted on these electric vehicles and hybrid vehicles has also been proposed. For example, a power system configured to be able to transfer power between a vehicle and a power line in a house via a connection device is known (Patent Document 1).

  Moreover, what supplies electric power from the battery of an electric vehicle to external system equipment via the power supply equipment installed in the parking space at the time of a power failure due to a natural disaster or the like is also known (Patent Document 2).

JP 2008-054439 A JP 2007-252117 A

  When power is supplied from the vehicle battery to the outside of the vehicle via an external facility such as a power supply facility, the place where the power is supplied is limited. In order to directly supply electric power from a vehicle battery to an external device including home appliances at any place without going through external equipment, the direct current supplied from the battery is changed to an alternating current of a commercial power supply voltage (for example, 100 V). It is necessary to mount on the vehicle an electrical component such as a power supply inverter to be converted and a control box that outputs an alternating current converted by the power supply inverter through an outlet. In this case, since the outlet plug of the household electrical appliance is inserted into and removed from the outlet provided in the control box, the control box is preferably arranged at a position (for example, in the passenger compartment) that is easily accessible by the passenger. In order to reduce the length of the cable connecting the power feeding inverter and the control box from the viewpoint of cost reduction and power loss reduction, it is desirable that the power feeding inverter be disposed in the vicinity of the control box.

  By the way, when the battery is disposed in the motor room in front of the vehicle and the power feeding inverter is disposed in the luggage compartment at the rear of the vehicle, a long power cable is routed from the front of the vehicle to the rear of the vehicle. A high voltage (for example, 300 V) current is supplied from the battery to the power cable connecting the battery and the power feeding inverter. For this reason, for example, when a power supply inverter or power cable is damaged and a high-voltage circuit or power cable conductor inside the power-supply inverter is exposed at the time of a vehicle collision, contact with the exposed high-voltage circuit or conductor, or There is a possibility of leakage to the vehicle body structure.

Further, when the voltage applied to the power cable changes, if the power cable emits radio waves to the outside and the radio waves are picked up by the car radio antenna , noise may be generated in the car radio while the vehicle is running.

  Therefore, the present invention can reduce the risk of electric leakage from the power cable due to a collision, and can suppress the generation of car radio noise due to external radio waves picked up by the power cable during traveling. The purpose is to provide.

In order to achieve the above object, a vehicle power supply system according to the present invention converts an electric motor that drives wheels, a battery that supplies electric power to the electric motor, and a direct current supplied from the battery into an alternating current. A power supply system for a vehicle that is mounted on a vehicle having a motor inverter and supplies power from the battery to the outside of the vehicle, the power supply inverter converting a direct current supplied from the battery into an alternating current; and A power feeding unit for outputting an alternating current converted by the power feeding inverter to the outside of the vehicle, and connected to the battery, the motor inverter, and the power feeding inverter, and from the battery to the motor inverter and the power feeding inverter. Switching means for switching the supply of direct current to the battery, and connecting the switching means and the power feeding inverter A power cable, wherein one of the switching means and the power feeding inverter is disposed at the front of the vehicle, the other is disposed at the rear of the vehicle, and the switching means is in a state where the vehicle is capable of traveling. In addition, supply of direct current to the power cable so that the power supply destination from the battery is the motor inverter and the power cable connecting the switching means and the supply inverter is in a non-energized state. The electric motor, the motor inverter and the switching means are arranged in the front part of the vehicle, and the power feeding inverter and the power feeding part are arranged in the rear part of the vehicle .

According to the present invention configured as described above, since the switching means and the power feeding inverter are arranged separately at the front and rear of the vehicle, the power cable is routed over a long distance between the front and rear of the vehicle. Then, when the vehicle is in a travelable state, supply of direct current to the power cable is interrupted by the switching means. As a result, a high voltage current is not applied to the long power cable while the vehicle is running. As a result, even if the vehicle collides while traveling, the risk of leakage from the power cable can be reduced. Moreover, even if a long power cable picks up external radio waves as an antenna, the power cable is electrically cut off while the vehicle is running, so that it is possible to suppress the occurrence of noise in the car radio.
In the case of a front wheel drive vehicle, it is desirable to provide a motor room in the front part of the vehicle near the drive wheel, and to arrange an electric motor, a motor inverter and switching means in this motor room. On the other hand, if the power feeding inverter and the power feeding unit are arranged, for example, in a luggage compartment at the rear of the vehicle, the power feeding operation from the outside of the vehicle to the power feeding unit becomes easy.

  The vehicle front part is, for example, the front of the passenger compartment, and the vehicle rear part is, for example, the rear of the passenger compartment. Further, the vehicle front portion may be forward of the battery disposed in the center in the vehicle front-rear direction, and the vehicle rear portion may be rearward from the battery disposed in the center in the vehicle front-rear direction.

  In the present invention, it is preferable that the switching means is connected to the power cable when the ignition of the vehicle is in an ON state and / or when the shift range is released from the parking state. Shut off the DC current supply.

  If the vehicle ignition is in the ON state or the shift range is set to the parking state, the condition for cutting off the DC current supply to the power cable is The supply of DC current can be cut off.

  In the present invention, it is preferable that the switching unit performs the power supply request operation in at least one of a case where the ignition of the vehicle is in an ON state and a case where the shift range is parked. When this occurs, the DC current supply cut-off state to the power cable is maintained.

  In this way, even when a power supply request operation is performed when the vehicle is in a travelable state, the state of interrupting the supply of direct current to the power cable is maintained. For this reason, it is possible to prevent a high voltage current from being applied to the power cable during traveling.

  According to the vehicle power supply system of the present invention, it is possible to reduce the risk of electric leakage from the power cable due to a collision, and to suppress the generation of car radio noise due to external radio waves picked up by the power cable during traveling. it can.

1 is a schematic plan view showing an overall structure of a vehicle on which a vehicle power feeding system according to an embodiment of the present invention is mounted. It is a top view which shows the luggage compartment floor of the vehicle carrying the vehicle electric power feeding system by embodiment of this invention. It is a block diagram of the electric power feeding system for vehicles by embodiment of this invention. It is a flowchart explaining operation | movement of the electric power feeding system for vehicles by embodiment of this invention.

Hereinafter, an embodiment of a parking assistance device of the present invention will be described with reference to the accompanying drawings.
First, a vehicle equipped with a vehicle power supply system according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic plan view showing the overall structure of a vehicle equipped with a vehicle power supply system according to an embodiment of the present invention.

  As shown in FIG. 1, a vehicle 1 equipped with a vehicle power feeding system according to an embodiment of the present invention is an electric vehicle equipped with a motor unit as a power source. A motor unit 2 that drives drive wheels 4 (left and right front wheels in the example of FIG. 1) is mounted in a motor room 2 at the front of the vehicle body (in front of the passenger compartment) of the vehicle 1. Further, a motor inverter 8, a junction box 10, and a battery charger 12 are disposed in the motor room 2.

  Further, a battery mounting frame 14 formed so as to have a substantially T shape in plan view is provided below the passenger compartment floor from the center to the rear of the vehicle body. A battery 16 that supplies power to the motor is mounted on the battery mounting frame 14.

  A charging receptacle 18 is provided on the left side surface of the rear part of the vehicle body. The charging receptacle 18 is connected to the battery charger 12 via the charging cable 20. The charging cable 20 is routed along the battery 16 on the lower surface side of the passenger compartment floor.

  Furthermore, a cargo compartment floor 22 is provided at the rear of the vehicle body (rear of the passenger compartment) of the vehicle 1 (part of which is shown in FIG. 1). A recess 24 is formed on the upper surface side of the cargo compartment floor 22. In this recess 24, an inverter 26 that converts a direct current supplied from the battery 16 into an alternating current of a commercial power supply voltage (for example, 100V), and a supply of the alternating current converted by the inverter 26 to the outside of the vehicle are controlled. A control box 28 as a control device is arranged. The power cable 30 connecting the inverter 26 and the junction box 10 is routed along the battery 16 along with the charging cable 20 on the lower surface side of the passenger compartment floor.

  Furthermore, with reference to FIG. 2, the detail of arrangement | positioning of the electrical component of an electric power feeding system is demonstrated. FIG. 2 is a plan view showing the cargo compartment floor of the vehicle on which the vehicle power supply system according to the embodiment of the present invention is mounted.

  FIG. 2 is a plan view showing the inverter 26 and the control box 28 disposed in the recess 24 of the cargo compartment floor 22. As shown in FIG. 2, a concave portion 24 having a substantially circular planar shape is formed on the upper surface side of the cargo compartment floor 22. As this recessed part 24, the spare tire pan provided in the luggage compartment floor 22 of the conventional vehicle can be diverted, for example. The inverter 26 and the control box 28 are arranged side by side in the vehicle width direction on the bottom surface 24 a of the recess 24.

  On the upper surface of the control box case 28a as the casing of the control box 28, there are an operation switch 28b for switching ON / OFF of power supply to the outside of the vehicle, and an outlet 28c which is a power supply terminal for outputting an alternating current output from the inverter. And are provided.

  A plug at one end of a connection cable 34 that is a connection means connection for connecting the outlet 28c and an external device is inserted into the outlet 28c in the vehicle. The outlet 28a is a standard outlet for commercial power. The connection cable is a standard product for commercial power supply, and may be, for example, a commercially available table tap or a plug cord of home appliances. The alternating current supplied from the inverter 26 is directly supplied from the outlet 28c to an external device such as a home appliance without going through an external facility such as a transformer, an inverter, or a frequency converter.

  Next, with reference to FIG. 3, an electrical configuration of a vehicle equipped with the vehicle power supply system according to the embodiment of the present invention will be described. FIG. 3 is a block diagram of the vehicle power supply system according to the embodiment of the present invention.

  As shown in FIG. 3, the junction box 10 is connected to the battery 16, the motor inverter 10, and the inverter 26, and switches the supply of direct current from the battery 16 to the motor inverter 10 and the inverter 26.

  The motor inverter 8 converts a direct current supplied from the battery 16 through the junction box 10 into an alternating current and supplies the alternating current to the motor unit 6. The driving force generated by the motor unit 6 is transmitted to the drive wheels 4 through a power transmission mechanism such as a transaxle.

  The battery charger 12 charges the battery 16 with the electric power supplied from the charging receptacle 18 via the charging cable 20. That is, the battery 16 is charged via the charging cable 20 and the battery charger 12 by connecting a charging plug provided at the tip of a charging cord drawn from an external power source such as a charging stand to the charging receptacle 18.

  The inverter 26 is connected to the junction box 10 via the power cable 30. The inverter 26 converts a direct current supplied from the battery 16 via the junction box 10 and the power cable 30 into an alternating current of a commercial power supply voltage (for example, 100 V), and outputs it to the control box 28 via the output cable 32. To do.

  The control box 28 is connected to the inverter 26 via the output cable 32 and controls the supply of the alternating current converted by the inverter 26 to the outside of the vehicle.

  Furthermore, the vehicle power supply system is controlled by a vehicle control module (VCM) 60 that controls various systems mounted on the vehicle 1. A signal indicating the setting state of the ignition 61 is input to the vehicle control module 60 from an ignition (IG) 61. When the ignition 61 is a cylinder type, the vehicle control module 60 may determine that the vehicle is in an inoperable state when the ignition 61 is set to ACC (accessory), or the ignition 61 is IG. When set to (ON, start), it may be determined that the vehicle is in an inoperable state. When the ignition 61 is a push start type, the vehicle control module 60 may determine that the vehicle cannot travel when the start button is pressed and the vehicle is ON.

  In addition, a signal indicating the set state of the range is input from the shift range 62 to the vehicle control module 60. The vehicle control module 60 may determine that the vehicle cannot travel when the shift lever is set to a parking (P) position, or when the parking button is pressed and It may be determined that the vehicle cannot travel. Furthermore, the vehicle control module 60 may determine that the vehicle is in an inoperable state only when the ignition 61 is set to the ON state and the shift range 62 is set to parking.

  In addition, the vehicle control module 60 displays desired information on the display device 64. The display device 64 may be arranged in the meter of the instrument panel in the vehicle compartment, or may be arranged in the control box 28.

Next, with reference to the flowchart of FIG. 4, the operation example of the vehicle electric power feeding system by embodiment of this invention is demonstrated.
A user who wants to supply power from the battery 16 of the vehicle 1 to an external device first performs an operation of switching the operation switch 28b provided in the control box 28 from OFF to ON (S401). The vehicle control module 60 may replace the operation of the operation switch 28b by detecting that the plug of the connection cable is connected to the outlet 28c of the control box 28. The attachment / detachment of the plug to / from the outlet 28c may be detected mechanically or electrically by providing an attachment / detachment sensor on the outlet 28c.

  Subsequently, the vehicle control module 60 determines whether or not the vehicle 1 is in an inoperable state (S402). Here, the vehicle control module 60 indicates that the vehicle control module 60 is in a state in which the vehicle 1 cannot travel only when the ignition 61 is set to OFF and the shift range 62 is set to parking. to decide. That is, the vehicle control module 60 uses the power cable in the junction box 10 as the switching means in at least one of the case where the ignition 61 of the vehicle is ON and the case where the parking state of the shift range 62 is released. The supply of direct current to 30 is cut off.

  When the vehicle control module 60 determines that the vehicle 1 is in an inoperable state (in the case of “no” in S402), the reason why the setting of the ignition 61 is in the ON state as the reason why power cannot be supplied to the display device 64, and Then, the fact that the shift range 62 is released from parking is displayed. For example, the display device 64 may display “Please turn off the IG key and set the range to P”. Based on the display, the user can perform the displayed operation necessary for supplying power.

  The vehicle control module 60 may determine that the vehicle 1 is in a travelable state when the setting of the ignition 61 is in the ON state. In that case, it is preferable to display “Please turn off the IG key” on the display device 64. In addition, the vehicle control module 60 may determine that the vehicle 1 is in a travelable state when the shift range 62 is released from parking. In that case, “Please set the range to P” may be displayed on the display device 64.

  Subsequently, the vehicle control module 60 cuts off the supply of direct current to the power cable 30 in the junction box 10 (S405). Thus, a high voltage current is not applied to the power cable 30 while the vehicle is traveling. For this reason, even if the vehicle collides while traveling, the risk of electric leakage from the power cable 30 can be reduced. Further, even if the power cable picks up external radio waves as an antenna, the power cable 30 is electrically cut off while the vehicle is traveling, so that it is possible to suppress the generation of car radio noise.

  On the other hand, when the setting of the ignition 61 is ON and the shift range 62 is set to parking (in the case of “yes” in S402), the vehicle control module 60 determines that the vehicle is in an inoperable state. In that case, the vehicle control module 60 connects the battery 16 and the power feeding inverter 26 in the junction box 10 (S403). As a result, a high voltage current is applied to the power supply route (power cable 30) to the power supply inverter 26.

  Then, the vehicle control module 60 energizes the power cable 30 to the power cable 30 until the operation switch 28b of the control box 28 is switched from ON to OFF (S404).

  In the above-mentioned embodiment, although the example which comprised this invention on the specific conditions was demonstrated, this invention can perform a various change and combination, and is not limited to this. In the above-described embodiment, the example of the electric vehicle has been described, but the present invention is not limited to the electric vehicle. The present invention can also be applied to a vehicle such as a hybrid vehicle.

  In the above-described embodiment, an example in which the switching unit is disposed in the front part of the vehicle and the power feeding inverter is disposed in the rear part of the vehicle has been described. However, in the present invention, the switching unit is disposed in the rear part of the vehicle. You may arrange | position the inverter for electric power feeding.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Motor room 4 Drive wheel 6 Motor unit 8 Motor inverter 10 Junction box 12 Battery charger 14 Battery mounting frame 16 Battery 18 Charging receptacle 20 Charging cable 22 Loading compartment floor 24 Recess 24a Bottom 26 Inverter 28 Control box 28a Control box case 28b Operation switch 28c Outlet 30 Power cable 32 Output cable 60 Vehicle control device (VCM)
61 Ignition (IG)
62 Shift range 63 Insulation resistance monitor

Claims (3)

It is mounted on a vehicle having an electric motor for driving wheels, a battery for supplying electric power to the electric motor, and a motor inverter for converting a direct current supplied from the battery into an alternating current. A power supply system for a vehicle for supplying electric power,
An inverter for feeding that converts a direct current supplied from the battery into an alternating current;
A power feeding unit for outputting the alternating current converted by the power feeding inverter to the outside of the vehicle; and connected to the battery, the motor inverter, and the power feeding inverter, and from the battery to the motor inverter and the power feeding inverter. Switching means for switching the supply of direct current to
A power cable connecting the switching means and the power feeding inverter;
With
One of the switching means and the power feeding inverter is disposed at the front of the vehicle, the other is disposed at the rear of the vehicle,
The switching means is configured such that when the vehicle is in a travelable state, the power supply destination from the battery is the motor inverter, and the power cable connecting the switching means and the supply inverter is not energized. In order to be in the state, cut off the supply of direct current to the power cable ,
The electric motor, the motor inverter and the switching means are arranged at the front of the vehicle,
The vehicle power supply system , wherein the power supply inverter and the power supply unit are arranged at a rear portion of the vehicle . The switching means cuts off the supply of direct current to the power cable when the ignition of the vehicle is in an ON state and / or when the shift range is released from the parking state. The vehicle power supply system according to claim 1. The switching means is connected to the power cable when a power feeding request operation is executed in at least one of the case where the ignition of the vehicle is in an ON state and the case where the shift range parking state is cancelled. The power supply system for a vehicle according to claim 1 or 2 , wherein the DC current supply cutoff state is maintained.

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