TWI429546B - Electrical power feeding system for electrical vehicle - Google Patents

Description

Power feeding system for electric vehicles

The present invention relates to a power feeding system for an electric vehicle.

Recently, electric vehicles such as a Plug-in Hybrid Vehicle (PHV) and a Battery Electric Vehicle (BEV) have been developed. Further, supplying commercial alternating current to an electric vehicle via a plug of a house is considered as a method for charging the electric vehicle (for example, this method is disclosed in Patent Document 1).

Patent literature

Patent Document 1: Japanese Patent Application Publication No. 8-33121

The current used to charge an electric vehicle is expected to be 20 amps to 30 amps at a voltage of 200 volts. This current accounts for a large percentage of current consumption in standard homes. Furthermore, when it is assumed that electrical equipment is used in a standard home, there is a possibility of using electric cooking appliances and heating, ventilation and air conditioning equipment while charging the electric vehicle. Electrical cooking appliances consume a lot of current. Heating, ventilation and air conditioning equipment, such as air conditioners, also consume large amounts of current. Therefore, in response to the above use cases, there is a need to use a lead-in cable and a main breaker adapted to a large amount of current. This means that it is actually very difficult to introduce a tool for charging an electric vehicle into an existing house. In addition, there are cases where electric vehicles become common throughout the region. In this case, there is a possibility that a large amount of current is consumed by using each electric device in each house, and at the same time, the electric vehicle is also charged in each house. This led to voltage drops and power failures of commercial power supplies throughout the region.

The object of the present invention is to solve the above problems. An object of the present invention is to produce a power feeding system for an electric vehicle that solves the following problems. One of these problems is to maintain convenience when using electrical equipment while charging an electric vehicle. One of these problems is to limit the peak current consumption. Further, the power feeding system for an electric vehicle in the present invention is easily introduced into an existing house.

In order to solve the above problems, the present invention discloses a power feeding system for a vehicle. The power feed system for a vehicle is configured to supply power to an electric vehicle having a battery and a charging circuit. A battery is provided to generate electricity that allows the vehicle to travel. The charging circuit is configured to charge the battery whereby the battery is charged by the charging circuit. The power feeding system includes a circuit breaker member, a current measuring unit, a control member, and a power feeding unit for the vehicle. The current measuring unit is configured to measure a current value of a main current applied to the circuit breaker member. The control member is configured to generate a power feed limit signal when the measured current value of the primary current exceeds a first threshold. The power feed limit signal includes an instruction to limit power supplied to the electric vehicle. A power feed unit for a vehicle is configured to receive power via a circuit breaker member and is configured to supply power to a charging circuit of the electric vehicle. When the control member generates a power feed limit signal, the power feed unit for the vehicle is configured to limit the current applied to the electric vehicle.

The preferred circuit breaker components are defined by the main breaker.

The preferred circuit breaker component includes a switchboard that includes a main breaker and a breaker. The current measuring unit is configured to measure the current value of the main current applied to the main circuit breaker. A power feed unit for a vehicle is configured to receive power via a branch circuit breaker. A power feeding unit for a vehicle is configured to supply power to a charging circuit of the electric vehicle. A power feeding unit for a vehicle is configured to limit power supplied to the electric vehicle when the control member generates a power feed limit signal.

A power feeding unit preferably used for a vehicle includes a connector terminal that is detachably attached to a connector of the vehicle. A power feed unit for a vehicle is configured to receive power via a circuit breaker member. A power feeding unit for a vehicle is configured to supply power to a charging circuit of the electric vehicle via a connector terminal.

That is, the power feed system for the vehicle is configured to supply power to an electric vehicle having a battery and a charging circuit. A battery is provided to generate electricity that allows the vehicle to travel. The charging circuit is configured to charge the battery when the charging circuit receives power. A power feeding system for a vehicle includes a power distribution panel, a current measuring device, a control member, and a power feeding unit for the vehicle. The switchboard contains the main breaker and the branch breaker. The current measuring device is configured to measure a current value of a main current applied to the main circuit breaker. The control device is configured to generate a power limit signal that includes an instruction to limit power supplied to the electric vehicle when the primary current value exceeds the first threshold. The power feeding unit includes a connector terminal that is detachably attached to a vehicle connector of the electric vehicle. A power feed unit for a vehicle is configured to receive power via a branch circuit breaker. A power feeding unit for a vehicle is configured to supply power to a charging circuit via a connector terminal. A power feed unit for a vehicle is configured to limit current supplied to the electric vehicle when the control device generates a current limit signal.

The preferred circuit breaker member has a current rating. The first threshold is set to be higher than the current rating.

The preferred main breaker has a current rating. The first threshold is set to be higher than the current rating.

A power feeding unit preferably used for a vehicle includes a disconnecting member. The disconnecting member is configured to open a power feed path that is provided for supplying power to the electric vehicle. When the control member generates the power feed restriction signal, the power feeding unit for the vehicle cuts off the power feeding path, whereby the power feeding unit for the vehicle is configured to limit the power supplied to the electric vehicle.

A power feeding unit preferably used for a vehicle includes a leakage detector. The leakage detector is configured to detect the presence or absence of leakage based on current flowing through the power feed path. The leakage detector is configured to allow the disconnecting component to cut the power feed path when the leakage detector detects a leakage.

A power feeding unit preferably used for a vehicle includes a signal transmission unit. The signal transmission unit is configured to transmit a signal to a charging circuit of the electric vehicle. When the control member generates a power feed limit signal, the power feed unit for the vehicle is configured to allow the signal transfer unit to transmit a charge stop signal to the charging circuit. The charge stop signal includes an instruction to stop supplying power to the electric vehicle. Accordingly, the power feeding unit for the vehicle is configured to limit the power supplied to the electric vehicle.

A power feeding unit preferably used for a vehicle includes a signal transmission unit. The signal transmission unit is configured to transmit a signal to a charging circuit of the electric vehicle via the connector terminal. When the control member generates a power feed limit signal, the power feed unit for the vehicle is configured to allow the signal transfer unit to transmit a charge stop signal to the charging circuit. The charging stop signal includes an instruction to stop charging. Therefore, the current supplied to the electric vehicle is limited.

A power feeding unit preferably used for a vehicle includes a signal transmission unit. The signal transmission unit is configured to transmit a signal to a charging circuit of the electric vehicle. When the control member generates a power feed limit signal, the power feed unit for the vehicle is configured to allow the signal transfer unit to send a current reduction signal to the charging circuit. The current reduction signal includes an instruction to reduce the current supplied to the electric vehicle. Therefore, the current supplied to the electric vehicle is limited.

A power feeding unit preferably used for a vehicle includes a signal transmission unit. The signal transmission unit is configured to transmit a signal to a charging circuit of the electric vehicle via the connector terminal. When the control member generates a power feed limit signal, the power feed unit for the vehicle is configured to allow the signal transfer unit to send a current reduction signal to the charging circuit. The current reduction signal includes an instruction to reduce the current supplied to the electric vehicle. Therefore, the current supplied to the electric vehicle is limited.

Preferably, when the measured current value of the primary current exceeds the first threshold during the first time period, the control member is configured to limit the power supplied to the electric vehicle.

Preferably, when the measured current value measured by the current measuring unit exceeds the second threshold during the predetermined time period, the control member is configured to transmit the power feed limit signal to the power feeding unit for the vehicle. The second threshold is set to be below the first threshold.

Preferably, the predetermined period of time is set to be longer than the first period of time.

Preferably, the second threshold is set to be equal to or greater than the current rating.

Preferably, when the power feeding unit for the vehicle reduces the current supplied to the electric vehicle, the measured current value becomes lower than the third threshold value lower than the first threshold value during a certain period of time, The control member is configured to generate a power feed limit cancellation signal. The power feed restriction cancellation signal includes an instruction to cancel the restriction on the power supplied to the electric vehicle. The power feeding unit for the vehicle is configured to cancel the restriction on the power supplied to the electric vehicle based on the power feed restriction cancellation signal.

Preferably, when both the first condition and the second condition are met, the control member is configured to generate a power feed limit cancellation signal. The power feed restriction cancellation signal includes an instruction to cancel the restriction on the power supplied to the electric vehicle. The first condition is that the power feeding unit for the vehicle reduces the current supplied to the electric vehicle. The second condition is that the measured current value becomes lower than a predetermined third threshold. The third threshold is set to be below the first threshold. The power feed unit for the vehicle is configured to cancel the restriction on the current supplied to the electric vehicle based on the power feed limit cancellation signal.

Preferably, the third threshold is set to be lower than the current rating.

Preferably, when the power feeding unit for the vehicle stops supplying power to the electric vehicle, the measured current value becomes lower than the third threshold value lower than the first threshold value during a certain period of time, the control The component is configured to generate a power feed limit cancellation signal. The power feed restriction cancellation signal includes an instruction to cancel the restriction on the power supplied to the electric vehicle. The power feeding unit for the vehicle is configured to cancel the restriction on the power supplied to the electric vehicle based on the power feed restriction cancellation signal.

In other words, the preferred control unit is configured to generate a power feed limit cancellation signal when the control unit recognizes that the first condition and the second condition are simultaneously met. The first condition is that the power feeding unit for the vehicle stops supplying power to the electric vehicle. The second condition is that the measured current value becomes lower than a third threshold below the first threshold. The power feeding unit for the vehicle is configured to cancel the restriction on the power supplied to the electric vehicle based on the power feed restriction cancellation signal.

Preferably, when the control member generates a power feed limit signal, the power feed unit for the vehicle limits the current supplied to the electric vehicle, thereby causing the main current to become lower than the current rating.

The preferred control member is a control unit that is disposed within the power feed unit for the vehicle.

The preferred control member is a control device.

A power feed system that is preferably used in a vehicle is configured to supply power to an electric vehicle having a battery and a charging circuit.

Moreover, a power feed system preferably for use with a vehicle is configured to supply power to the first electrical device and the second electrical device. The control component is configured to prioritize the first electrical device to a first order of priority. The control component is configured to prioritize the second electrical device to a second order of priority. The control component is configured to prioritize the electric vehicle to a third order of priority. The third order of priority is lower than the second order of priority. The second order of priority is lower than the first order of priority. When the control member generates a power feed limit signal, the power feed unit for the vehicle is configured to limit the current supplied to the electric vehicle having the third order of priority. The control member is configured to recognize the first limiting condition when the power feeding unit for the vehicle limits the current supplied to the electric vehicle. When the control member generates the power feed restriction signal under the first restriction condition, the power feeding unit for the vehicle limits the power supplied to the second electrical device having the second order priority.

Moreover, a power feed system preferably for use with a vehicle is configured to supply power to a plurality of electrical devices. The control components are configured to prioritize each of the electrical devices. The control member is configured to prioritize the electric vehicle to the lowest order of priority among the electric vehicle and the electrical device. When the control member generates a power feed limit signal, the power feed unit for the vehicle is configured to limit the power supplied to the electric vehicle having the lowest order priority. The control member is configured to recognize the first restriction condition when the power feeding unit for the vehicle limits the power supplied to the electric vehicle having the lowest order priority. When the control member generates a power feed limit signal under the first limiting condition, the power feeding unit for the vehicle is configured to follow the electrical equipment having the lowest order priority among the plurality of electrical devices to have the highest order of priority The order of electrical equipment limits the power supplied to the electrical equipment.

"The control unit is configured to generate a power feed limit signal to the power feed unit when the primary current becomes greater than the first threshold," and "the power feed unit for the vehicle is configured to limit supply to the electric power based on the power feed limit signal" The configuration of the "current of the vehicle" makes it possible to prioritize the use of electrical equipment in the home during battery charging. For example, the use of temporary electrical cookers has a major impact on everyday life. Conversely, the charging of the battery of an electric vehicle takes a long time. Therefore, the temporary limitation of the power supplied to the battery has little effect on the charging of the battery. Therefore, when the main current exceeds the first threshold, the power supplied to the electric vehicle is limited. Therefore, the power supplied to the electrical equipment in the home is prioritized. Therefore, the peak value of the main current is lowered, whereby this configuration makes it possible to maintain the convenience of daily life. In addition, according to the prevention of the peak value of the main current, even if the electric vehicle becomes common throughout the region, it is possible to reduce the peak current consumption throughout the region. Therefore, it is possible to supply power stably.

Further, the configuration in which the power feeding unit for the vehicle has the disconnecting member in the power feeding path makes it possible to limit the current supplied to the electric vehicle. Thus, this configuration makes it possible for the system to eliminate the need for communication circuitry configured to communicate with the charging circuitry of the electric vehicle, as compared to the case where the charging current is limited by the charging circuitry of the electric vehicle. That is, this configuration makes it possible to reduce the cost of the power feeding unit for the vehicle.

In addition, when a leakage detector configured to detect leakage is used, the leakage detector may use a disconnecting component when the leakage detector detects a leakage.

Further, when the power feeding unit for the vehicle that is configured to transmit the charging stop signal to the electric vehicle to allow the charging circuit to stop charging is used, it is possible to stop the power supplied to the electric vehicle.

Furthermore, when a power feeding unit for a vehicle configured to transmit a charging reduction signal to a charging circuit of an electric vehicle is used, it is possible to reduce the current supplied to the charging circuit. Therefore, it is possible to limit the power supplied to the electric vehicle.

In addition, when the configuration of "limiting the current supplied to the electric vehicle when the supply is greater than the second threshold value lower than the first threshold" is used, even if the main current is lower than the first threshold, It is possible to reduce the peak value of the main current.

In addition, in the case where the configuration "configured to cancel the current limit when the main current becomes lower than the third threshold value during a certain period of time under the condition that the current supplied to the electric vehicle is lowered" is used, It is possible to charge the battery by current before limiting the current supplied to the electric vehicle.

Further, in the case where the configuration "configured to cancel the current limit when the main current becomes lower than the third threshold value during a certain period of time when the current supplied to the electric vehicle is stopped" is used, It is possible to charge the battery by current before limiting the current supplied to the electric vehicle.

Best mode for carrying out the invention

Hereinafter, each embodiment of the present invention will be explained with reference to the drawings.

(First Embodiment)

A first embodiment of the present invention will be explained using Figs. 1 and 2 . Fig. 1 is a block diagram showing a power feeding system for a vehicle in the first embodiment. A power feeding system for a vehicle includes a power distribution panel 1 , a current measuring unit 2 , a control box 3, and a power feeding unit 4 for a vehicle. The switchboard 1 is placed in the house H. The switchboard 1 includes a main breaker 11 and a branch breaker 12 . The electric current measuring unit 2 is realized by a current current transformer. The current measuring unit 2 is configured to measure the main current I1 flowing to the main breaker 11 . The control box (control unit) 3 is configured to generate a power feed limit signal when the current value measured by the current measuring unit 2 exceeds a predetermined first threshold. The current supply limit signal indicates an instruction to limit the current supplied to the electric vehicle 50 . The power feeding unit 4 for the vehicle is configured to receive commercial AC power. The power feeding unit 4 for a vehicle is configured to supply electric power to the electric vehicle, whereby the power feeding unit 4 for the vehicle charges the battery.

The electric vehicle 50 is exemplified by a battery electric vehicle and a plug-in hybrid vehicle. The electric vehicle includes a vehicle body 50 of the connector 53, the connector 53 is removable from the vehicle attached to a vehicle or for power feeding unit 54 of the connector terminal. When the charging circuit 51 receives the commercial alternating current power source via the vehicle connector 53 and the connector terminal 5 , the charging circuit 51 converts the commercial alternating current power source into a direct current power source. The charging circuit 51 charges the battery 52 . The battery 52 is exemplified by a battery such as a lithium ion battery.

The switchboard 1 is installed in various parts of the house. The switchboard 1 includes a main breaker 11 and a plurality of branch breakers 12 . The main breaker 11 is connected to the main power line L1 , which leads to the inside of the house H. The branch circuit breaker 12 is connected to the main breaker via a conductive bar 13 , thus leaving the branch breaker 12 downstream of the main breaker 11 .

The control box 3 is configured to compare the current value of the main current measured by the current measuring unit 2 with the first threshold value, whereby the control box 3 determines whether the current value is higher than the first threshold or lower than the first Limit. When the current value measured by the current measuring unit 2 exceeds the first threshold value for a predetermined period of time, the control box 3 outputs the power feeding limit signal to the power feeding unit 4 for the vehicle via the signal line. The power feed limit signal indicates that the power supply is stopped. For example, main breaker 11 has a current rating of 50 amps. The control box 3 has a first threshold Th1 of 55 amps. The first threshold value Th1 of 55 amps corresponds to a current rating of 110%. When the condition that the current value measured by the current measuring unit 2 becomes equal to or greater than 55 amps in one second is satisfied, the control box 3 outputs an instruction to stop supplying power to the electric vehicle 50 and transmits it to the The power feed limit signal of the power feeding unit 4 of the vehicle.

The power feeding unit 4 for a vehicle is installed, for example, on a wall outside the house H , and the house H is adjacent to a parking lot for the electric vehicle 50 . The power feeding unit 4 for the vehicle receives commercial AC power (for example, 200 volt AC) from the branch circuit breaker 12 in the distribution board 1 via the branch line L2 . Further, the power feeding unit 4 for a vehicle is provided with a charging cable CA. The charging cable CA includes a power line L3 and a signal line L4 . The charging cable CA has a connector terminal 5 at one end thereof. The connector terminal 5 is detachably attached to the vehicle connector 53 of the electric vehicle 50 . The charging cable CA has a cable length sufficient to reach the electric vehicle 50 parked in the parking lot. The charging cable CA is wound around a retractable cable reel (not shown), thereby retracting the charging cable CA. When using the charging cable CA , pull the charging cable out of the retractable cable tray.

The power feeding unit 4 for a vehicle includes a relay 41 , a zero phase sequence current ratio converter (ZCT) 42, and a leakage detector 43 . Relay 41 to the intermediate portion 40 of the inner wire, the inner wire 40 is disposed L3 connected via branch lines and a power line L2. Relay 41 is configured to turn on and off power supply to electric vehicle 50 . The zero phase sequence current comparator 42 is configured to detect an unbalanced current flowing through the internal line 40 . Leakage detector 43 is configured to detect leakage based on induced current induced in zero phase sequence current comparator 42 . The leakage detector 43 is configured to switch off the relay when the leakage detector 43 detects a leakage. Further, the power feeding unit 4 for a vehicle includes a control unit 44 , a signal conversion unit 45 , a signal output unit 46, and a power source 47 . Control unit 44 is configured to generate a charge control signal SA based on signals transmitted from control box 3 . A charge control signal SA is provided for controlling the charging of the electric vehicle 50 . The signal conversion unit 45 is configured to convert the charge control signals generated by the control unit 44 into signals standardized by the automotive industry. The signal standardized by the automotive industry is, for example, a signal standardized by the Society of Automotive Engineers (SAE: Registered Trademark). The signal output unit 46 is configured to transmit the "charge control signal SA in its signal form by the signal conversion unit 45 " to the electric vehicle via the signal line L4 . The power supply 47 is configured to receive commercial AC power from the power distribution panel 1 and is configured to generate operational power for operating the leakage detector 43 , the control unit 44 , the signal conversion unit 45, and the signal output unit 46 . The charging control signal SA sent from the signal output unit 46 is a pulse signal having a variable duty cycle. The charging circuit 51 of the electric vehicle 50 is configured to determine a limit value for the current value for charging. The limit value of the current value for charging is proportional to the duty cycle of the charge control signal SA .

The operation of the power feeding system in this embodiment will be explained using FIG. 2 herein. A measured value of FIG. 2 illustrates a measurement of the amount of current measuring unit 2 of the main current I1. Figure 2B illustrates the output signal output from the control box 3 . FIG. 2C illustrates a duty cycle from the power control unit 4 for the vehicle to the charging control signal SA of the electric vehicle 50 . Figure 2D illustrates the charging current I2 . Further, in FIG. 2 A second shaded area indicates included in the main current of the charging current I1, I2. The charging current I2 is used to charge the electric vehicle 50 .

In the period between time t0 and time t1 , the power feeding unit 4 for the vehicle supplies electric power to the electric vehicle 50 , whereby the battery of the electric vehicle 50 can be charged. In addition, electrical equipment is also used in the house H during the period between t0 and t1 . The sum of the "current consumed by each electric device in the house H " and the "charging current I2 " corresponds to the measured value of the main current I1 . The main current I1 is lower than the first threshold Th1 . Therefore, the control box 3 outputs no "power feed limit signal". In this embodiment, the first threshold Th1 is determined to be 55 amps. The first threshold value Th1 of 55 amps corresponds to 110% of the main circuit breaker 11 current rating. That is, the main circuit breaker has a current rating equal to 50 amps.

At time t1 , electrical equipment configured to consume a significant amount of power begins to be used in the home H. Therefore, the measured value of the main current I1 exceeds the first threshold Th1 (55 amps). The control box 3 is configured to continuously compare the measured value of the main current I1 with the first threshold value Th1 , whereby the control box 3 determines whether the measured value of the main current I1 is higher than the first threshold value Th1 or low. At the first threshold Th1 . At time t2 , the condition that "main current I1 exceeds first threshold Th1 " is maintained during the predetermined period δT1 . Therefore, at time t2 , the control box 3 transmits "the power feed restriction signal S1 indicating that the charging of the electric vehicle 50 is stopped" to the power feeding unit 4 for the vehicle.

When the control unit 44 for the power feeding unit 4 of the vehicle receives the power feeding restriction signal S1 at time t2 , the control unit 44 generates a charging control signal SA indicating that the charging current I2 is lowered to zero. (The charging control signal SA indicating that the charging current I2 is lowered to zero is, in other words, the charging stop signal SA .) The signal conversion unit 45 converts the signal form of the charging control signal SA . Subsequently, the signal output unit 46 transmits the charging control signal SA to the electric vehicle 50 .

When the charging circuit 51 of the electric vehicle 50 receives the charging control signal SA from the power feeding unit 4 for the vehicle, the charging circuit 51 of the electric vehicle 50 controls the current value of the charging current I2 according to the duty cycle of the charging control signal SA . When the duty cycle of the charge control signal SA becomes 0% at time t2 , the power feeding unit 4 for the vehicle reduces the charging current I2 to zero. That is, the first threshold Th1 (which is equal to 55 amps) is higher than the current rating of the main breaker 11 . When a current equal to or greater than the first threshold value Th1 is applied to the main breaker 11 , the control box 3 generates a power feed restriction signal S1 . Based on the power feed restriction signal S1 , the power feeding unit 4 for the vehicle stops charging the battery of the electric vehicle 50 . Therefore, the main current I1 is adjusted within the current rating range after time t2 . Therefore, when an excessive current is applied to the main breaker 11 , it is possible to prevent the main breaker 11 from being cut.

Further, if the electric appliance of the house H is stopped in a period after the time t3 when the battery charging of the electric vehicle 50 is stopped, the main current I1 is lowered to a predetermined current value smaller than the third threshold value Th3 . (The third threshold value Th3 is defined as the return current value.) When the main current I3 is kept below the third threshold value Th3 during a certain period δT2 , the control box 3 generates a power feed restriction cancel signal. S2 . The power feed limit cancel signal S2 indicates that the restriction on the power supplied to the electric vehicle 50 is cancelled.

When the control unit 44 of the power feeding unit 4 for the vehicle receives the power feeding restriction cancel signal S2 at time t4 , the control unit 44 generates a charging control signal SA for adjusting the charging current I2 to a current value, the current value being equal to The current value before the current stops. The signal conversion unit 45 converts the signal form of the charging control signal. Subsequently, the signal output unit 46 outputs the charging control signal to the electric vehicle 50 . Therefore, at time t4 , the duty cycle of the charge control signal SA changes to be equal to the duty cycle in the period before the current is stopped. (In other words, at time t4 , the duty cycle of the charge control signal SA changes to a duty cycle equal to the period before time t2 .) Therefore, the current value of the charging current I2 changes to a current value which is equal to the current. The value of the current in the period before the value is stopped. In this manner, the charging circuit 51 charges the battery 52 with a current value equal to the current value in the period before the current is stopped. Under this condition, the current consumed by the electrical equipment in the home H is reduced. Therefore, even if the charging current I2 increases, the current value of the main current I1 is lower than the first threshold value Th1 . Therefore, electric power is continuously supplied to the electric vehicle 50 .

In the case where "the main breaker has a current rating of 50 amps" and "the maximum value of the charging current of the electric vehicle 50 is 24 amps", it is possible to set the third threshold Th3 to 26 amps. However, considering the additional margin of the current value of 2 amps, the third threshold Th3 is set to 24 amps. The first threshold value Th1 and the third threshold value Th3 can be arbitrarily set by the user in consideration of the specifications of the power distribution equipment in the house and the specifications of the electric vehicle 50 .

As will be understood from the above explanation, in the power feeding system for a vehicle in this embodiment, when the measured value of the main current I1 exceeds the first threshold value Th1 , the control box 3 defined as the control device The power feed limit signal is sent to the power feeding unit 4 for the vehicle. The power feeding unit 4 for the vehicle limits the power supplied to the electric vehicle 50 based on the power feeding restriction signal. Therefore, it is possible to prioritize the use of each electrical device in the house H during charging of the electric vehicle. That is, electrical equipment such as electrical cookers are temporarily used in life. Electrical equipment such as electrical cookers have a considerable impact on life. Conversely, the battery of an electric vehicle needs to be charged for a long time. Therefore, temporarily stopping the supply of electric power to the electric vehicle has little effect on the charging of the electric vehicle. Therefore, when the main current I1 exceeds the first threshold value Th1 , the electric power supplied to the electric vehicle 50 is limited. Therefore, power is supplied to each electrical device in the house H on a priority basis. Therefore, it is possible to prevent the peak of the main current from being formed, whereby it is possible to maintain the convenience of life. Further, the formation of the peak of the main current I1 is prevented so that even if the electric vehicle is widely used in the entire area, it is possible to lower the peak value of the current consumption in the entire area. Therefore, this configuration makes it possible to supply power stably.

As described above, the power feeding system for a vehicle in the present invention is configured to supply electric power to the electric vehicle. The electric vehicle includes a battery and a charging circuit. The charging circuit is configured to charge the battery. A power feeding system for a vehicle in the present invention includes a power distribution panel, a current measuring unit, a control unit, and a power feeding unit for the vehicle. The switchboard includes a circuit breaker member having a main breaker and a branch breaker. The current measuring unit is configured to measure the current value of the main current applied to the main circuit breaker. The control unit is configured to determine a first threshold. The control unit is configured to generate a power feed limit signal when the equivalent current value exceeds the first threshold. The power feed limit signal includes an instruction to limit the power supplied to the electric vehicle. A power feeding unit for a vehicle includes a connector terminal. The connector terminals are detachably attached to the connector of the vehicle. A power feed unit for a vehicle is configured to receive AC power from the branch circuit breaker and configured to supply AC power to a charging circuit of the electric vehicle via a connector. When the control unit generates a power feed limit signal, the control unit limits the current supplied to the vehicle.

Therefore, when the main current exceeds the first threshold, the control unit transmits the power feed limit signal to the power feeding unit for the vehicle. Based on the power limit signal, the power feeding unit for the vehicle limits the current supplied to the electric vehicle. Therefore, it is possible to prioritize the use of electrical equipment over the vehicle battery. That is, it is possible to prevent the peak of the main current by supplying current to the electrical equipment of the home on a priority basis. Therefore, it is possible to maintain the convenience of daily life. In addition, even if electric vehicles become common throughout the region, it is possible to prevent peak current consumption. Therefore, it is possible to supply power stably.

In addition, the main breaker has a current rating. The first threshold is set to be higher than the current rating. Therefore, when the main current exceeds the first threshold, the condition that the main current exceeds the current rating is recognized. Therefore, it is possible to limit the power supplied to the electric vehicle immediately when the main current exceeds the first threshold. That is, it is possible to prevent an excessive current from being continuously applied to the main breaker. Therefore, it is possible to prevent the main breaker from being cut.

In this embodiment, when the main current I1 exceeds the first threshold value Th1 during a certain period of time, the supply of electric power to the electric vehicle 50 is stopped. However, it is also possible to stop supplying power to the electric vehicle 50 at a time when the main current I1 exceeds the first threshold value Th1 .

Conversely, it is also preferred that the control unit is configured to generate a power feed limit signal when the equivalent current value exceeds the first threshold during a period of one second (1 second). This is because of the following reasons. That is, when the electrical device is activated, there is a possibility of causing an overshoot. According to the overshoot, there is a possibility that the main current instantaneously exceeds the first threshold. When the main current instantaneously exceeds the first threshold, it is not preferable to stop supplying current to the electric vehicle immediately. This is because the charging circuit receives the load when the current changes frequently. Therefore, the preferred control unit determines that the main current exceeds the first threshold condition when the main current is not affected by the overshoot of the main current.

In this embodiment, the control unit is configured to generate a power feed limit signal when the equivalent current value exceeds the first threshold during the first time period. The first time period is set to a one second period (1 second). However, the first time period is not limited to the time period set to one second. It is possible to arbitrarily decide the first time period. This can be similarly applied to the following embodiments.

(Second embodiment)

The second embodiment in this embodiment will be explained with reference to Figs. 3 and 4. Fig. 3 is a diagram showing the system configuration diagram of this embodiment. The same components as those of the first embodiment are denoted by the same reference numerals. Therefore, the explanation of the same components as those of the first embodiment is omitted.

In the first embodiment, the power feeding unit 4 for the vehicle is configured to receive the power feeding restriction signal from the control box 3 , and to transmit the charging control signal SA to the electric vehicle 50 based on the power feeding restriction signal. Therefore, the power feeding unit 4 for the vehicle allows the charging circuit 51 to limit the charging current I2 . However, in this embodiment, the power feeding unit 4 for the vehicle further includes a relay 41 . Relay 41 is configured to start/stop supplying power to electric vehicle 50 . The control unit 44 of the power feeding unit 4 for the vehicle turns off the relay 41 based on the power feed restriction signal transmitted from the control box 3 . Therefore, the control unit 44 stops supplying power to the electric vehicle 50 .

The operation in this embodiment will be explained with reference to Figs. 4A to 4C. FIG. 4A illustrates the measured value of the main current measured by the current measuring unit 2 . Figure 4B illustrates the output signal output from the control box 3 . Fig. 4C illustrates a state in which the relay 41 is turned on or off. The shaded portion of Fig. 4A indicates the charging current I2 included in the main current I1 . The charging current I2 is used to charge the battery of the electric vehicle 50 .

In the period between time t0 and time t1 , the relay 41 for the power feeding unit 4 of the vehicle has an open state. Therefore, the power feeding unit 4 for the vehicle supplies electric power to the electric vehicle 50 , whereby the battery of the electric vehicle 50 can be charged. In addition, electrical equipment is also used in the house H during the period between t0 and t1 . The sum of the "current consumed by each electrical device in the house H " and the "charging current I2 " corresponds to the measured value of the main current I1 . The main current I1 is lower than the first threshold Th1 . Therefore, the control box 3 does not output the "power feed restriction signal". In this embodiment, the first threshold Th1 is determined to be 55 amps. The first threshold value Th1 of 55 amps corresponds to the current rating of 110% of the main breaker 11 . That is, the main circuit breaker has a current rating equal to 50 amps.

At time t1 , electrical equipment configured to consume a significant amount of power begins to be used in the home H. Therefore, the measured value of the main current I1 exceeds the first threshold Th1 (55 amps). The control box 3 is configured to continuously compare the measured value of the main current I1 with the first threshold value Th1 , whereby the control box 3 determines whether the measured value of the main current I1 is higher than the first threshold value Th1 or low. At the first threshold Th1 . At time t2 , the condition that "main current I1 exceeds first threshold Th1 " is maintained for a predetermined period of time δT1 . Therefore, at time t2 , the control box 3 transmits "the power feed restriction signal S1 indicating that the charging of the electric vehicle 50 is stopped" to the power feeding unit 4 for the vehicle. At time t2 , the control unit 44 of the power feeding unit 4 for the vehicle receives the power feed restriction signal S1 . Therefore, the control unit 44 turns off the relay 41 , thereby stopping the supply of electric power to the electric vehicle 50 .

In this way, when a current higher than the first threshold Th1 (55 amps) is applied to the main breaker 11 during a period of one second, the power feeding unit 4 for the vehicle is transmitted based on "self-control box 3 The power feed limit signal S1 "stops supplying "charge current I2 " to the electric vehicle 50 . Therefore, the main current I1 is adjusted within the current rating range. Therefore, when an excessive current is applied to the main breaker 11 , it is possible to prevent the main breaker 11 from being cut.

Further, if the electric appliance of the house H is stopped in a period after the time t3 at which the charging of the battery of the electric vehicle 50 is stopped, the main current I1 is lowered to a predetermined current value smaller than the third threshold value Th3 . (The third threshold value Th3 is defined as the return current value.) When the main current I3 becomes lower than the third threshold value Th3 during a certain period of time δT2 , the control box 3 generates a power feed restriction cancellation. Signal S2 . The power feed limit cancel signal S2 indicates that the restriction on the power supplied to the electric vehicle 50 is cancelled. When the control unit 44 for the power feeding unit 4 of the vehicle receives the power feed restriction cancel signal S2 , the control unit 33 turns on the relay 41 . Therefore, the power feeding unit 4 for the vehicle supplies electric power to the electric vehicle 50 . In this manner, the charging circuit 51 of the electric vehicle restarts charging of the battery 52 . Under this condition, the current consumption generated by the electrical equipment in the home H is reduced. Therefore, even if the charging current I2 increases, the main current I1 is lower than the first threshold value Th1 . Therefore, electric power is continuously supplied to the electric vehicle 50 .

In the case where "the main breaker has a current rating of 50 amps" and "the maximum value of the charging current of the electric vehicle 50 is 24 amps", it is possible to set the third threshold Th3 to 26 amps. However, considering the additional margin of the current value of 2 amps, the third threshold Th3 is set to 24 amps. The first threshold value Th1 and the third threshold value Th3 can be arbitrarily set by the user in consideration of the specifications of the power distribution equipment in the house and the specifications of the electric vehicle 50 .

As will be understood from the above explanation, in the power feeding system for a vehicle in this embodiment, when the measured value of the main current I1 exceeds the first threshold value Th1 , the control box 3 defined as the control device The power feed limit signal is sent to the power feeding unit 4 for the vehicle. The power feeding unit 4 for the vehicle is configured to turn off the relay 41 based on the power feed limit signal. Therefore, the power feeding unit 4 for the vehicle stops supplying power to the electric vehicle. Therefore, it is possible to prioritize the use of each electrical device in the house H during the charging period of the electric vehicle. That is, electrical equipment such as electrical cookers are temporarily used in life. Therefore, electrical equipment such as electric cookers have a considerable impact on life. Conversely, the battery of an electric vehicle needs to be charged for a long time. Therefore, temporarily stopping the supply of electric power to the electric vehicle has little effect on the charging of the electric vehicle. Therefore, when the main current I1 exceeds the first threshold value Th1 , the electric power supplied to the electric vehicle 50 is limited. Therefore, power is supplied to each electrical device in the house H on a priority basis. Therefore, it is possible to prevent the peak of the main current from being formed, whereby it is possible to maintain the convenience of life. Further, the formation of the peak of the main current I1 is prevented so that even if the electric vehicle becomes widely used throughout the region, it is possible to lower the peak value of the current consumption in the entire region. Therefore, this configuration makes it possible to supply power stably.

That is, the power feeding unit for the vehicle in this embodiment includes the disconnecting member. The disconnecting member is configured to cut off the power feeding path. When the control unit generates a power feed limit signal, the disconnecting unit cuts off the power feeding path. Therefore, the current supplied to the electric vehicle is limited.

Therefore, when the main current exceeds the current rating of the main breaker, the power supplied to the electric vehicle is immediately limited. That is, it is possible to prevent a continuous excess current from being applied to the main breaker. Therefore, it is possible to prevent the main breaker from being cut.

In this embodiment, when the main current I1 exceeds the first threshold value Th1 during a certain period of time, the supply of electric power to the electric vehicle 50 is stopped. However, it is also possible to stop supplying power to the electric vehicle 50 at a time when the main current I1 exceeds the first threshold value Th1 .

(Third embodiment)

The third embodiment in this embodiment is explained in Fig. 5. The components in this embodiment are the same as those of the first embodiment. Therefore, explanations and explanations of the components are omitted.

In the first embodiment, when the main current I1 exceeds the first threshold value Th1 during a certain period of time, the power feeding unit 4 for the vehicle stops supplying electric power to the electric vehicle 50 . However, in this embodiment, when the main current I1 exceeds the first threshold value Th1 during a certain period of time, the power feeding unit 4 for the vehicle lowers the current value of the charging current I2 .

The operation in this embodiment will be explained in Fig. 5. FIG. 5A illustrates the measured value of the main current I1 measured by the current measuring unit 2 . Figure 5B illustrates the output signal output from the control box 3 . Figure 5C illustrates a duty cycle from the charging control signal SA sent by the power feeding unit 4 for the vehicle to the electric vehicle. Figure 5D illustrates the charging current I2 .

In the period between time t0 and time t1 , the power feeding unit 4 for the vehicle supplies electric power to the electric vehicle 50 , whereby the battery of the electric vehicle 50 can be charged. In addition, electrical equipment is also used in the house H during the period between t0 and t1 . The sum of the "current consumed by each electrical device in the house H " and the "charging current I2 " corresponds to the measured value of the main current I1 . The main current I1 is lower than the first threshold Th1 . Therefore, the control box 3 does not output the "power feed restriction signal". In this embodiment, the first threshold Th1 is determined to be a predetermined ampere. The predetermined amperage of the first threshold value Th1 exceeds the current value corresponding to the current rating of the main breaker 11 of 110%. That is, the current rating of the main breaker is, for example, equal to 60 amps.

At time t1 , electrical equipment configured to consume a large amount of power is used in the home H. Therefore, the measured value of the main current I1 exceeds the first threshold Th1 ( 60 amps). The control box 3 is configured to continuously compare the measured value of the main current I1 with the first threshold value Th1 , whereby the control box 3 determines whether the measured value of the main current I1 is higher than the first threshold value Th1 or low. At the first threshold Th1 . In the time t2 , the condition "the main current I1 exceeds the first threshold value Th1 " is maintained for the predetermined period δT1 . Therefore, at time t2 , the control box 3 transmits "the power feed restriction signal S3 including the instruction to lower the charging current I2 " to the power feeding unit 4 for the vehicle.

When the control unit 44 for the power feeding unit 4 of the vehicle receives the power feeding restriction signal S1 at time t2 , the control unit 44 generates a charging control signal SA indicating that the charging current is lowered by dI1 . (The charging control signal SA indicating that the charging current I2 is lowered by dI1 is , in other words, the charging stop signal SA .) The first threshold value Th1 is 10 amps higher than the current rating of the main breaker 11 . According to this setting, the current reduction dI1 is set to 12 amps in consideration of the margin of 2 amps. During the period up to time t1 , if the power feeding unit for the vehicle transmits a signal that allows the charging circuit 51 to charge the battery at 30 amps or less, the charging circuit 51 of the electric vehicle 50 sets the battery at or below 30 amps. Charging. The power feeding unit for the vehicle includes a current detector 48 that is implemented by a current comparator. Current detector 48 is configured to detect current flowing through internal line 40 . Based on the detection result generated by the current detector 48 , the power feeding unit 4 for the vehicle generates a charging control signal SA indicating that the charging current I2 is adjusted to have a current value lower than the current charging current value by dI1 . 45 converts the output signal form the charge control signal SA, and the charge control signals SA from the signal output unit 46, the signal conversion unit 50 to the electric vehicle.

When the charging circuit 51 of the electric vehicle 50 receives the charging control signal SA from the power feeding unit 4 for the vehicle, the charging circuit 51 of the electric vehicle 50 controls the current value of the charging current I2 according to the duty cycle of the charging control signal SA . When the duty cycle of the charge control signal SA changes at time t2 , the power feeding unit 4 for the vehicle reduces the charging current I2 according to the change of the duty cycle. Therefore, the charging current I2 is reduced by dI1 . That is, the first threshold Th1 (which is equal to 60 amps) is higher than the current rating of the main breaker 11 . When a current equal to or greater than the first threshold Th1 is applied to the main breaker 11 for one second, the control box 3 generates a power feed restriction signal S3 . Based on the power feed restriction signal S3 , the power feeding unit 4 for the vehicle reduces "the charging current I2 supplied to the electric vehicle 50 " by dI1 . Therefore, the main current I1 is reduced by dI1 , whereby the main current I1 becomes equal to or lower than 48 amps. Therefore, the main current I1 is adjusted within the current rating range. Therefore, when an excessive current is applied to the main breaker 11 , it is possible to prevent the main breaker 11 from being cut. Further, although the current value supplied to the electric vehicle 50 is reduced, it is possible to continuously charge the battery without stopping charging of the battery.

Further, if the electric appliance of the house H is stopped during the period after the time t3 when the charging of the battery of the electric vehicle 50 is stopped, the main current I1 is lowered to a predetermined current value smaller than the third threshold value Th3 . (The third threshold value Th3 is defined as the return current value.) When the main current I1 is kept below the third threshold value Th3 for a certain period of time δT2 , the control box 3 generates a power feed restriction cancellation. Signal S4 . The power feed limit cancel signal S4 indicates that the restriction on the power supplied to the electric vehicle 50 is canceled.

When the control unit 44 of the power feeding unit 4 for the vehicle receives the power feeding restriction cancel signal S4 at time t4 , the control unit 44 generates a charging control signal SA for increasing the current charging current I2 by dI1 . The signal conversion unit 45 converts the signal form of the charging control signal. Subsequently, the signal output unit 46 outputs the charging control signal to the electric vehicle 50 . 50 of the electric vehicle charging circuit 51 is configured to charge control signals SA based on the operating cycle of the charge current, the charge control signal SA from the system for transmitting the power feeding unit 4 of the vehicle. Therefore, at time t4 , the duty cycle of the charge control signal SA changes to be equal to the duty cycle in the period before the current is reduced. (In other words, at time t4 , the duty cycle of the charge control signal SA changes to a duty cycle equal to the period before time t2 .) Therefore, the charging circuit 51 of the electric vehicle 50 increases the charging current by dI1 . Therefore, the charging circuit 51 charges the battery 52 with a current value equal to the current value in the period before time t2 . Under this condition, the current consumed by the electrical equipment in the home H is reduced. Therefore, even if the charging current I2 increases, the current value of the main current I1 is lower than the first threshold value Th1 . Therefore, electric power is continuously supplied to the electric vehicle 50 .

As will be understood from the above explanation, in the power feeding system for a vehicle in this embodiment, when the measured value of the main current I1 exceeds the first threshold value Th1 , the control box 3 defined as the control device The power feed limit signal is sent to the power feeding unit 4 for the vehicle. The power feeding unit 4 for the vehicle reduces the power supplied to the electric vehicle 50 based on the power feeding restriction signal. Therefore, it is possible to prioritize the use of each electrical device in the house H during charging of the electric vehicle. That is, electrical equipment such as electrical cookers are temporarily used in life. Therefore, electrical equipment such as electric cookers have a considerable impact on life. Conversely, the battery of an electric vehicle needs to be charged for a long time. Therefore, temporarily stopping the supply of electric power to the electric vehicle has little effect on the charging of the electric vehicle. Therefore, when the main current I1 exceeds the first threshold value Th1 , the electric power supplied to the electric vehicle 50 is reduced. Therefore, power is supplied to each electrical device in the house H on a priority basis. Therefore, it is possible to prevent the peak of the main current from being formed, whereby it is possible to maintain the convenience of life. Further, the formation of the peak of the main current I1 is prevented so that even if the electric vehicle becomes widely used throughout the region, it is possible to lower the peak value of the current consumption in the entire region. Therefore, this configuration makes it possible to supply power stably.

In this embodiment, when the main current I1 exceeds the first threshold value Th1 during a certain period of time, the electric power supplied to the electric vehicle 50 is reduced. However, it is also possible to immediately reduce the charging current I2 supplied to the electric vehicle 50 at a time when the main current I1 exceeds the first threshold value Th1 .

(Fourth embodiment)

The second embodiment in this embodiment is explained in Fig. 6. The components in this embodiment are the same as those of the first embodiment. Therefore, explanations and explanations of the components are omitted.

In the third embodiment, when the main current I1 exceeds the first threshold value Th1 during a certain period δT1 , the power feeding unit 4 for the vehicle restricts supply of electric power to the electric vehicle 50 . In contrast, in this embodiment, when the main current I1 exceeds the second threshold value Th2 during the predetermined period δT3 , the power feeding unit 4 for the vehicle restricts supply of electric power to the electric vehicle 50 . The second threshold value Th2 is set to be lower than the first threshold value Th1 . ΔT3 predetermined period set longer than a certain period after δT1.

The operation of this embodiment will be explained in Fig. 6. FIG. 6A illustrates the measured value of the main current I1 measured by the current measuring unit 2 . Figure 6B illustrates the output signal output from the control box 3 . FIG. 6C illustrates a duty cycle of "from the power feeding unit 4 for the vehicle to the charging control signal SA of the electric vehicle 50 ". Figure 6D illustrates the charging current I2 .

In the period between time t0 and time t1 , the power feeding unit 4 for the vehicle supplies electric power to the electric vehicle 50 , whereby the battery of the electric vehicle 50 is charged. In addition, electrical equipment is also used in the house H during the period between t0 and t1 . The current measuring unit 2 is configured to provide a measured value of the main current I1 . Control box 3 is configured to compare the measured value to each of first threshold value Th1 and second threshold value Th2 . The control box 3 is configured to output a power feed limit signal S3 when the main current I1 exceeds the first threshold value Th1 for a predetermined period of time δT1 . Alternatively, the control box 3 is configured to output the power feed limit signal S3 when the main current I1 exceeds the second threshold value Th2 during the predetermined period δT3 . (ΔT3 predetermined period longer than the predetermined time period is set by [Delta] T1.) Limits the power feeding signal supplied to the instruction S3 comprises reducing the electric vehicle 50 of the charging current I2. The power feed limit signal S3 is sent to the power feeding unit 4 for the vehicle. In the period between time t0 and time t1 , the sum of "current consumed by each electric device in the house H " and "charging current I2 " corresponds to the measured value of the main current I1 . The main current I1 is lower than the first threshold Th1 and lower than the second threshold Th2 . Therefore, the control box 3 does not output the "power feed restriction signal". In this embodiment, the first threshold Th1 is determined to be a predetermined amperage. In this embodiment, the first threshold value Th1 is set to a current value corresponding to a current rating of 110% of the main breaker 11 . That is, the first threshold Th1 is set to 55 amps, which corresponds to a current rating (50 amps) of the main breaker 11 equal to 110%. The second threshold value Th2 is set to be equal to the value of the current rating of the main breaker 11 (50 amps).

At time t1 , electrical equipment configured to consume a large amount of power is used in the home H. Therefore, the measured value of the main current I1 exceeds the second threshold value Th2 (50 amps). However, the magnitude of the main current I1 is below the first threshold (55 amps). When the current value of the main current I1 becomes higher than the second threshold value Th2 and becomes lower than the first threshold value Th1 during the predetermined period δT3 , the control box 3 transmits the power feed restriction signal S3 to A power feeding unit 4 for a vehicle. (The predetermined time period δT3 is set, for example, to five minutes. The power feed limit signal S3 includes an instruction to reduce the charging current I2 .)

When the control unit 44 for the power feeding unit 4 of the vehicle receives the power feeding restriction signal S3 at time t2 , the control unit 44 generates a charging control signal SA . (The charge control signal SA is in other words a current reduction signal.) The charge control signal SA includes an instruction to reduce the current current value by dI2 . The first threshold value Th1 is set to be 5 amps higher than the current rating of the main breaker 11 . (The first threshold Th1 is set to be 55 amps higher than the current rating of the main breaker 11. ) The second threshold Th1 is set to be equal to the value of the main breaker 11 (50 amps) . Therefore, considering the margin of 2 amps, when the charging current I2 exceeds the second threshold value Th2 , the amount of decrease dI1 of the current is set to 7 amps. When the power feeding unit 4 for the vehicle transmits a signal allowing the battery to be charged at 30 amps or less during the period until the time t1 , the charging circuit 51 of the electric vehicle 50 charges the battery at 30 amps or less. Current detector 48 , implemented by a current comparator, is configured to detect current flowing through internal line 40 . Therefore, based on the current detected by the current detector 48 , the power feeding unit 4 for the vehicle generates the charging control signal SA . The charge control signal SA includes an instruction to adjust the charge current I2 by reducing the current current value by dI2 . (For example, if the current charging current is 25 amps, the current of dI1 is reduced to 18 amps. 25 amps to 7 amps = 18 amps.) The signal conversion unit 45 converts the signal form of the charging control signal SA . Subsequently, the signal output unit 46 transmits the charging control signal SA to the electric vehicle 50 .

Charging the electric vehicle 50 of the circulating circuit 51 to adjust the charging current in accordance with the operation of the charging control signal SA, the signal SA charging control system for transmitting power from the feeding unit 4 of the vehicle. When the duty cycle of the charge control signal SA changes at time t2 , dI2 is reduced according to the varying duty cycle charge current I2 . Therefore, the charging current I2 becomes equal to or less than 18 amps. Further, the main current I2 becomes equal to or less than 48 amps. Therefore, it is possible to adjust the main current I1 within the current rating range.

As described above, the control box 3 generates the power feed restriction signal S3 when the current is higher than the second threshold value Th2 within five minutes and lower than the first threshold value Th1 . (Specifically, when compared with the current rating of the main breaker 11 , the control box 3 generates a power feed limit signal S3 when the excess current is within 5 amps within five minutes.) Power Feeding Unit for Vehicles 4 The charging current I2 is reduced by dI2 based on the power feed limit signal S3 sent from the control box 3 . Therefore, the main current I1 is reduced by dI2 , whereby the main current I1 has a current value equal to or less than 48 amps. That is, the main current I1 is adjusted within the current rating range. Therefore, it is possible to prevent the main breaker 11 from being cut due to an excessive current. Further, although the charging current is reduced in the electric vehicle 50 , it is possible to continuously charge the battery of the electric vehicle 50 without stopping charging of the battery.

Subsequently, during the period after time t3 , the charging current I2 supplied to the electric vehicle 50 is decreased. Under this condition, when the electrical equipment of the house H is stopped, the main current I1 becomes lower than the predetermined third threshold value Th3 . ("Becomes a main current lower than the third threshold Th3 ", in other words, is defined as a return current.) When the condition that the main current I1 becomes lower than the third threshold is maintained for a certain period of time δT4 , The control box 3 generates a power feed restriction cancel signal S4 . The power feed limit cancel signal S4 includes an instruction to cancel the restriction on the power supplied to the electric vehicle 50.

When the control unit 44 for the power feeding unit 4 of the vehicle receives the current supply restriction cancel signal S4 at time t4 , the control unit 44 generates a charging control signal SA . The charge control signal SA includes an instruction to increase the current current by dI2 . The signal conversion unit 45 converts the signal form of the charge control signal SA . Subsequently, the signal output unit 46 transmits a charging control signal to the electric vehicle 50 . In the charging circuit 51 of the electric vehicle 50 at time t4 , when the duty cycle is changed to be equal to the duty cycle in the period before the duty cycle of the charging control signal SA is decreased, the charging circuit 51 increases the charging current I2 by dI2 . Therefore, the charging circuit 51 charges the battery 52 with a current value equal to the current value in the period before time t2 . Under this condition, even if the charging current I2 is increased, the current consumed by each electric device in the house H has been reduced. Therefore, the main current I1 has a current value lower than both the first threshold value Th1 and the second threshold value Th2 . Therefore, the charging of the electric vehicle 50 is continued.

As will be understood from the above explanation, even if the main current I1 applied to the main breaker 11 is lower than the first threshold value Th1 , it is possible that the current is lower than the first threshold value Th1 and equal to the period during the predetermined period δT3 . The power supplied to the electric vehicle 50 is limited or higher than the second threshold value Th2 . Therefore, it is possible to reduce the peak value of the main current I1 .

(Fifth Embodiment)

The invention in the fifth embodiment will be explained with reference to Fig. 7. The components in this embodiment are approximately the same as those of the first embodiment except that the control box 3 is omitted. Therefore, the same components as those in the first embodiment are denoted by the same component symbols. According to the above, the explanation of the same components as those in the first embodiment is omitted.

In the first embodiment, the current measuring unit 2 is configured to measure the main current I1 , whereby the current measuring unit 2 generates a measuring current. The control box 3 is configured to compare the measured current with the first threshold Th1 , whereby the control box 3 determines whether the main current I1 is higher than the first threshold Th1 or lower than the first threshold Th1 . When the current value of the main current I1 remains higher than the first threshold value Th1 during a certain period δT, the control box 3 transmits the power supply control signal to the power feeding unit 4 for the vehicle. The power supply control signal includes instructions to limit the supply of power to the electric vehicle 50 . Therefore, the power feeding unit 4 for the vehicle limits the current supplied to the electric vehicle 50 . In contrast, in this embodiment, the functions included in the control box 3 are provided in the control unit 44 for the power feeding unit 4 of the vehicle.

That is, the current measuring unit 2 measures the current value of the main current I1 , whereby the current measuring unit 2 generates the measured current value. The control unit 44 of the power feeding unit 4 for the vehicle compares the measured current value with the first threshold value Th1 , whereby the control unit 44 continuously determines whether the measured current value is higher than the first threshold value Th1 or low. At the first threshold Th1 . When the current value of the main current I1 becomes higher than the first threshold value Th1 during a certain period δT1 , the control unit 44 generates a charging control signal SA . The charging control signal SA is in other words a charging stop signal. The charge control signal SA includes an instruction to stop charging the battery. The signal conversion unit 45 converts the signal form of the signal. Then, the signal output unit 46 transmits the signal from the signal output unit 46 to the electric vehicle 50 . Further, when the supply of electric power to the electric vehicle 50 is stopped, the control unit 44 of the power feeding unit 4 for the vehicle compares the measured current value with the third threshold value Th3 . (The measured current value is generated by the current measuring unit when the current measuring unit 2 measures the current amount.) Therefore, the control unit 44 identifies whether the main current I1 is higher than the third threshold Th3 or lower than the third. Threshold Th3 . When the current value of the main current I1 remains below the third threshold value Th3 during a certain period δT2 , the control unit 44 generates a charging control signal SA . The charge control signal SA includes an instruction to restart charging the battery. The signal conversion unit 45 converts the signal form of the charge control signal SA . Subsequently, the signal output unit 46 transmits a signal to the electric vehicle 50 . As will be understood from the above explanation, this embodiment discloses a power feeding unit 4 for a vehicle that includes a control unit 44 having the function of the control box 3 . Therefore, it is not necessary to use the control box 3 . Therefore, it is possible to simplify the system configuration.

It is apparent that for the second embodiment, the third embodiment, and the fourth embodiment, it is possible to use a power feeding unit for a vehicle including the control unit 44 having the function of the control box 3 . This configuration makes it possible to omit the control box 3 from the second embodiment, the third embodiment, and the fourth embodiment, respectively.

(Sixth embodiment)

The invention in this embodiment will be explained with reference to Figs. 8 and 9.

The power feeding system for a vehicle in this embodiment is approximately equivalent to the power feeding system for a vehicle in the third embodiment, with the exception of the following two features, one of which is an air conditioner 7a , air conditioning The device 7b and another characteristic structure are an interface unit 6a and an interface unit 6b . Each of the air conditioner 7a and the air conditioner 7b includes a JEM-A terminal. The JEM-A terminal complies with the standards of the Japan Electrical Manufacturers Association. Each of the interface unit 6a and the interface unit 6b is configured to convert the signal transmitted from the control box 3 into a signal corresponding to the JEM-A terminal, and is configured to transmit the signal to the corresponding air conditioner 7a , air. Regulator 7b . The same components as those of the third embodiment are denoted by the same reference numerals. Therefore, the explanation of the same components as those of the third embodiment is omitted.

The power feeding system for a vehicle in the third embodiment is configured to limit the power supplied to the electric vehicle when the main current I1 exceeds a predetermined first threshold. However, the power feeding system for the vehicle in this embodiment is configured to set the air conditioner 7a , the air conditioner 7b to be used for the restriction, in addition to the electric vehicle 50 , when the main current I1 exceeds the threshold value. The goal of electricity supply. The electric vehicle 50 , the air conditioner 7a , and the air conditioner 7b are given priority. The relationship between the priority order of the electric vehicle 50 and the air conditioner 7a and the air conditioner 7b is determined as follows. (Electric vehicle 50 <air conditioner 7a <air conditioner 7b ) stops the power supply in the order of lowest to highest priority. That is, when the main current exceeds the first threshold, the supply of power to the electric vehicle 50 having the lowest priority is stopped. Then, when the main current I1 exceeds a predetermined threshold, the supply of power to the air conditioner 7a having the lowest priority next to the electric vehicle 50 is stopped. Subsequently, when the primary current I1 exceeds a predetermined threshold, stopping the supply of the power supply to the air conditioner of the lowest order of priority as to have inferior 7a 7b of the air conditioner.

The operation in this embodiment will be explained in Fig. 9. FIG. 9A illustrates the measured value of the main current I1 measured by the current measuring unit 2 . Figure 9B illustrates the output signal output from the control box 3 . FIG. 9C illustrates a duty cycle from the power supply unit 4 for the vehicle to the charging control signal SA of the electric vehicle 50 . Figure 9D illustrates the charging current I2 . Figure 9E illustrates the JEMA signal applied to the air conditioner 7a . Fig. 9F illustrates an open state or a closed state of the air conditioner 7a . The shaded portion A in Fig. 9A illustrates the charging current I2 included in the main current I1 . The charging current I2 is supplied to the electric vehicle 50 . The shaded portion B illustrates the current consumed by the air conditioner 7a .

In the period between time t0 and time t1 , the power feeding unit 4 for the vehicle supplies electric power to the electric vehicle 50 , whereby the battery of the electric vehicle 50 can be charged. In addition, electrical equipment is also used in the house H during the period between t0 and t1 . The sum of the "current consumed by each electric device in the house H " and the "charging current I2 " corresponds to the measured value of the main current I1 . The main current I1 is lower than the first threshold Th1 . Therefore, the control box 3 does not output the "power feed restriction signal". In this embodiment, the first threshold Th1 is determined to be 55 amps. The first threshold value Th1 of 55 amps corresponds to the current rating of 110% of the main breaker 11 . That is, the main circuit breaker has a current rating equal to 50 amps.

At time t1 , electrical equipment configured to consume a large amount of power is used in the home H. Therefore, the measured value of the main current I1 exceeds the first threshold Th1 (55 amps). The control box 3 is configured to continuously compare the measured value of the main current I1 with the first threshold value Th1 , whereby the control box 3 determines whether the measured value of the main current I1 is higher than the first threshold value Th1 or low. At the first threshold Th1 . In the time t2 , the condition "the main current I1 exceeds the first threshold value Th1 " is maintained during the predetermined period δT1 . Therefore, at time t2 , the control box 3 transmits "the power feed restriction signal S1 including the instruction to reduce the charging current I2 supplied to the electric vehicle 50 " to the power feeding unit 4 for the vehicle.

When the control unit 44 of the power feeding unit 4 for the vehicle receives the power feeding restriction signal S3 at time t2 , the control unit 44 generates a charging control signal SA indicating that the charging current I2 is decreased by dI1 . (The charge control signal SA indicating that the charging current I2 is decreased by dI1 is , in other words, the charge reduction signal SA .) The first threshold value Th1 is 5 amps higher than the current rating of the main breaker 11 . According to this setting, the current reduction dI1 is set to 7 amps in consideration of the 2 ampere margin. During the period up to time t1 , if the power feeding unit for the vehicle transmits a signal that allows the charging circuit 51 to charge the battery at 30 amps or less, the charging circuit 51 of the electric vehicle 50 sets the battery at or below 30 amps. Charging. The power feeding unit for the vehicle includes a current detector 48 that is implemented by a current comparator. Current detector 48 is configured to detect current flowing through internal line 40 . Based on the detection result generated by the current detector 48 , the power feeding unit 4 for the vehicle generates a charging control signal SA indicating that the charging current I2 is adjusted to have a current value lower than the current charging current value by dI1 . (For example, when the current charging current value is 25 amps, the current adjustment value is 18 amps (25 amps - 7 amps = 18 amps)) the signal conversion unit 45 converts the signal form of the charging control signal SA , and The charge control signal SA is output from the signal output unit 46 to the electric vehicle 50 .

When the charging circuit 51 of the electric vehicle 50 receives the charging control signal SA from the power feeding unit 4 for the vehicle, the charging circuit 51 of the electric vehicle 50 controls the current value of the charging current I2 according to the duty cycle of the charging control signal SA . When the duty cycle of the charge control signal SA changes at time t2 , the power feeding unit 4 for the vehicle reduces the charging current I2 by dI1 according to the duty cycle that varies at time t2 . That is, the first threshold Th1 (which is equal to 55 amps) is higher than the current rating of the main breaker 11 . When a current equal to or greater than the first threshold value Th1 is applied to the main breaker 11 during one second, the control box 3 generates a power feed restriction signal S3 . Based on the power feed restriction signal S3 , the power feeding unit 4 for the vehicle reduces "the charging current I2 supplied to the electric vehicle 50 " by dI1 . However, there is a case where the main current I1 exceeds the current rating (50 amps) although the main current I1 is decreased by dI1 . In this case, at time t3 , a current exceeding the current rating value is continuously applied during the predetermined time period δT4 . Therefore, at time t3 , the control box 3 transmits "a signal including the instruction to stop the air conditioner 7a having the lowest priority order of the electric vehicle" to the IFU 6a . In response to this, the IFU 6a transmits a JEMA signal including the stop command S5 to the regulator 7a . At this point, the air conditioner 7a is stopped by the JEMA signal transmitted from the IFU 6a . Therefore, the main current I1 is adjusted within the current rating range. In this way, it is possible to prevent the main breaker from being cut due to excessive current applied to the main breaker 11 . Further, although the current value of the charging current in the electric vehicle 50 is reduced, it is possible to continuously charge the battery without stopping the charging.

Subsequently, in the period after time t4 , the charging current I2 of the electric vehicle 50 is decreased, and the air conditioner 7a is also stopped. Under this condition, when the electrical equipment of the house H is stopped, the main current I1 becomes lower than the predetermined third threshold value Th3 . ("The main current I1 becomes lower than the third threshold Th3 is defined as the return current.") When the main current I1 becomes lower than the third threshold Th3 during a certain period δT2 , the control box 3 will The "signal including the command to operate the air conditioner 7a " is sent to the IFU 6a . In response to this, the IFU 6a transmits the JEMA signal including the operation command S6 to the air conditioner 7a . Therefore, the air conditioner 7a is restarted by the JEMA signal transmitted from the IFU 6a . Therefore, the main current I1 increases the current consumed by the air conditioner 7a . However, if the main current I1 is still lower than the third threshold value Th3 , the control box 3 transmits the "power feed restriction cancel signal S4 " to the electric vehicle 50 "at the time t6 after the predetermined period of time δT5 elapses". The power feed limit cancel signal S4 includes an instruction to cancel the restriction on the power supply.

When the control unit 44 of the power feeding unit 4 for the vehicle receives the power feeding restriction cancel signal S4 at time t6 , the control unit 44 generates a charging control signal SA including an instruction to increase the current value of the current charging current I2 by dI1 . The signal conversion unit 45 converts the signal form of the charge control signal SA . The signal output unit 46 transmits the charging control signal SA to the electric vehicle 50 . The charging circuit 51 of the electric vehicle 50 is configured to adjust the charging current in accordance with a duty cycle of the charging control signal, the charging control signal being transmitted from the power feeding unit 4 for the vehicle. At time t6 , the duty cycle of the charge control signal SA changes to equal to the duty cycle during the time period prior to time t2 . Therefore, the charging circuit 51 of the electric vehicle 50 increases the charging current by dI1 . Therefore, the charging circuit 51 charges the battery 52 with a current value equal to the current value in the period before time t2 . At this time, even if the charging current I2 increases, the current consumed by the electric equipment in the house H is also reduced. Therefore, the main current I1 becomes lower than the first threshold value Th1 . Therefore, the "power feeding" to the electric vehicle 50 is continued.

Further, a power feeding system for a vehicle is configured to supply power to the first electrical device and the second electrical device. The control component is configured to prioritize the first electrical device to a first order of priority. The control component is configured to prioritize the second electrical device to a second order of priority. The control component is configured to prioritize the electric vehicle to a third order of priority. The third order of priority is lower than the second order of priority. The second order of priority is lower than the first order of priority. When the control member generates a power feed limit signal, the power feed unit for the vehicle is configured to limit the current supplied to the electric vehicle having the third order of priority. The control member is configured to recognize the first limiting condition when the power feeding unit for the vehicle limits the current supplied to the electric vehicle. When the control member generates the power feed restriction signal under the first restriction condition, the power feeding unit for the vehicle limits the power supplied to the second electrical device having the second order priority.

Further, a power feed system for a vehicle is configured to supply power to a plurality of electrical devices. The control components are configured to prioritize each of the electrical devices. The control member is configured to prioritize the electric vehicle to the lowest order of priority among the electric vehicle and the electrical device. When the control member generates a power feed limit signal, the power feed unit for the vehicle is configured to limit the power supplied to the electric vehicle having the lowest order priority. The control member is configured to recognize the first restriction condition when the power feeding unit for the vehicle limits the power supplied to the electric vehicle having the lowest order priority. When the control member generates a power feed limit signal under the first limiting condition, the power feeding unit for the vehicle is configured to follow the electrical equipment having the lowest order priority among the plurality of electrical devices to have the highest order of priority The order of electrical equipment limits the power supplied to the electrical equipment.

This configuration makes it possible to maintain the convenience of living when using electrical equipment. In addition, it is possible to prevent the peak of current consumption.

In addition, a plurality of electrical devices are provided to the home. Therefore, it is possible to maintain the convenience of the life of the user in the home when using the electrical equipment.

Further, when the control member generates the power feed restriction signal under the first condition, the power feeding unit for the vehicle stops or reduces the power supplied to the second electrical device.

Further, when the control member generates the power feed restriction signal under the first condition, the power feeding unit for the vehicle follows the order from the electrical device having the lowest order priority to the electrical device having the highest order priority among the electrical devices Stop or reduce the power supplied to the electrical equipment.

It is apparent that it is possible to apply the "member for controlling the power feeding" to the above embodiment (except the third embodiment). Therefore, it is possible to control the power supplied to the "electrical equipment having the JEM-A terminal, such as an air conditioner" and the "electric vehicle". Therefore, it is possible to obtain the same effect in this embodiment. Further, this embodiment is explained using an electric device which is an air conditioner 7a having a JEM-A terminal and an air conditioner 7b . However, it is possible to apply the members disclosed in this embodiment to an electric device such as a floor heating system having a JEM-A terminal.

Further, in each of the above embodiments, the switchboard 1 supplies commercial alternating current power to the electric vehicle 50 . However, when "electric vehicle 50 is receiving DC power" and "battery 52 is configured to be charged by DC power", it is possible to use a switchboard configured to distribute DC power to electrical equipment in the home, thereby being powered The vehicle 50 supplies a DC power source.

That is, the power supplied from the power source via the circuit breaker member may be a direct current power source and an alternating current power source.

In the above embodiment, the switchboard includes a main breaker and a branch breaker. However, branch circuit breakers are not required for switchboards. That is, the switchboard needs to have a circuit breaker.

Further, the branch circuit breaker is disposed in a line between the main breaker and the power feeding unit for the vehicle. In addition, the branch circuit breaker is placed in the line between the main breaker and the electrical equipment.

Further, in the above embodiment, the first threshold value is set to a current rating equal to or higher than 110%. However, it is not necessary to set the first threshold value to a value equal to or higher than 110% of the current rating. That is, the first threshold can be arbitrarily determined.

Further, in the above embodiment, the electric vehicle is connected to the power feeding system for the vehicle by the connector. However, the connection established by the connector is not essential in the present invention. That is, it is possible to apply the system to a wireless charging system.

1. . . switchboard

2. . . Electric current measuring unit

3. . . Control box (control device)

4. . . Power feeding unit for vehicles

5. . . Connector terminal

6a. . . Interface unit

6b. . . Interface unit

7a. . . Air conditioner

7b. . . Air conditioner

11. . . Main breaker

12. . . Branch circuit breaker

13. . . Conductive strip

40. . . Internal line

41. . . Relay

42. . . Zero phase sequence current comparator

43. . . Leakage detector

44. . . control unit

45. . . Signal conversion unit

46. . . Signal output unit

47. . . power supply

48. . . Current detector

50. . . Electric vehicle

51. . . Charging circuit

52. . . battery

53. . . Vehicle connector

CA. . . Charging cable

dI1. . . Current reduction / current increase

dI2. . . Current reduction / current increase

H. . . Residential

I1. . . Main current

I2. . . recharging current

L1. . . Main power line

L2. . . Branch line

L3. . . power line

L4. . . Signal line

S1. . . Power feed limit signal

S2. . . Power feed limit cancellation signal

S3. . . Power feed limit signal

S4. . . Power feed limit cancellation signal

S5. . . Stop instruction

S6. . . Operational instruction

SA. . . Charging control signal

T0. . . time

T1. . . time

T2. . . time

T3. . . time

T4. . . time

T6. . . time

δT1. . . Scheduled time

δT2. . . Time slot

δT3. . . Scheduled time

δT4. . . Scheduled time

δT5. . . Scheduled time

Th1. . . First threshold

Th2. . . Second threshold

Th3. . . Third threshold

Fig. 1 is a diagram showing a system configuration diagram of the first embodiment.

2A to 2E illustrate waveforms of the above respective components.

Fig. 3 is a view showing a system configuration diagram of the second embodiment.

4A to 4C illustrate waveforms of the above respective components.

5A to 5D are diagrams showing waveforms of respective components of the third embodiment.

6A to 6D illustrate waveforms of respective components of the fourth embodiment.

Fig. 7 is a view showing a system configuration diagram of the fifth embodiment.

Fig. 8 is a view showing a system configuration diagram of the sixth embodiment.

Figures 9A through 9F illustrate waveforms of the above various components.

1. . . switchboard

2. . . Electric current measuring unit

3. . . Control box (control device)

4. . . Power feeding unit for vehicles

5. . . Connector terminal

11. . . Main breaker

12. . . Branch circuit breaker

13. . . Conductive strip

40. . . Internal line

41. . . Relay

42. . . Zero phase sequence current comparator

43. . . Leakage detector

44. . . control unit

45. . . Signal conversion unit

46. . . Signal output unit

47. . . power supply

48. . . Current detector

50. . . Electric vehicle

51. . . Charging circuit

52. . . battery

53. . . Vehicle connector

CA. . . Charging cable

SA. . . Charging control signal

H. . . Residential

I1. . . Main current

I2. . . recharging current

L1. . . Main power line

L2. . . Branch line

L3. . . power line

L4. . . Signal line

Claims (23)

A power feeding system for a vehicle configured to supply a power to an electric vehicle having a battery and a charging circuit provided for generating the power to allow the electric vehicle to travel, The charging circuit is configured to charge the battery, whereby the battery is charged by the charging circuit, the power feeding system for the vehicle comprising: a circuit breaker member; a current measuring unit configured to measure the applied to a current value of one of the main currents of the circuit breaker member; a control member configured to generate a power feed limit signal when the measured current value of the main current exceeds a first threshold value, the power feed limit signal An instruction to limit one of the power supplied to the electric vehicle; a power feed unit for the vehicle configured to receive the power via the circuit breaker member and configured to supply the power to the electric vehicle a charging circuit, the power feeding unit for the vehicle configured to limit supply to the power when the control member generates the power feeding limit signal The current of the vehicle, wherein the member has a current rating of the circuit breaker, the first threshold value higher than the current rating. A power feeding system for a vehicle according to claim 1, wherein the circuit breaker member comprises a power distribution panel including a main circuit breaker And a circuit breaker unit configured to measure the current value of the main current applied to the main circuit breaker, the power feeding unit for the vehicle being configured to receive via the branch circuit breaker The power, and configured to supply the power to the charging circuit of the electric vehicle, the power feeding unit for the vehicle configured to limit supply to the electric vehicle when the control member generates the power feed limit signal The power. A power feeding system for a vehicle according to claim 1, wherein the power feeding unit for the vehicle includes a connector terminal detachably attached to one of the vehicle connectors, the A power feeding unit of the vehicle is configured to receive the power via the circuit breaker member and is configured to supply the power to the charging circuit of the electric vehicle via the connector terminal. A power feeding system for a vehicle according to claim 2, wherein the main breaker has a current rating, the first threshold being higher than the current rating. A power feeding system for a vehicle according to claim 1, wherein the power feeding unit for the vehicle includes a disconnecting member configured to cut off a power feeding path, the power feeding path being Provided for supplying the electric power to the electric vehicle, wherein when the control member generates the power feed restriction signal, the power feeding unit for the vehicle cuts off the power feeding path, whereby the power feeding for the vehicle The unit is configured to limit the power supplied to the electric vehicle. The power feeding system for a vehicle of claim 5, wherein the power feeding unit for the vehicle includes a leakage detector configured to detect the current detection based on the power feeding path The leakage current is present or absent, and the leakage detector is configured to allow the disconnecting component to cut the power feeding path when the leakage detector detects the leakage. The power feeding system of claim 1, wherein the power feeding unit for the vehicle comprises a signal transmission unit configured to transmit a signal to the charging circuit of the electric vehicle, wherein the control When the component generates the power feed limit signal, the power feeding unit for the vehicle is configured to allow the signal transmission unit to send a charging stop signal to the charging circuit, the charging stop signal comprising stopping supplying the power to the electric vehicle One of the instructions whereby the power feed unit for the vehicle is configured to limit The power supplied to the electric vehicle. A power feeding system for a vehicle according to claim 3, wherein the power feeding unit for the vehicle includes a signal transmission unit configured to transmit a signal to the electric vehicle via the connector terminal The charging circuit, wherein when the control member generates the power feed limit signal, the power feeding unit for the vehicle is configured to allow the signal transmission unit to send the charging stop signal to the charging circuit, the charging stop signal including The charging stops one of the commands whereby the current supplied to the electric vehicle is limited. The power feeding system for a vehicle according to claim 1, wherein the power feeding unit for the vehicle includes a signal transmission unit configured to transmit the signal to the charging circuit of the electric vehicle, Wherein the power feeding unit for the vehicle is configured to allow the signal transmitting unit to transmit a current reduction signal to the charging circuit when the control member generates the power feeding limit signal, the current reducing signal comprising reducing supply to the electric vehicle One of the currents is commanded, whereby the current supplied to the electric vehicle is limited. A power feeding system for a vehicle according to claim 3, wherein the power feeding unit for the vehicle includes a signal transmission unit configured to transmit a signal to the electric vehicle via the connector terminal The charging circuit, wherein when the control member generates the power feed limit signal, the power feeding unit for the vehicle is configured to allow the signal transmission unit to send the current reduction signal to the charging circuit, the current reduction signal including reduction One of the currents supplied to the electric vehicle is commanded, whereby the current supplied to the electric vehicle is limited. The power feeding system for a vehicle of claim 1, wherein the control member is configured to limit supply when the measured current value of the main current exceeds the first threshold value during a first time period The power to the electric vehicle. The power feeding system for a vehicle according to claim 1, wherein when the measured current value measured by the current measuring unit exceeds a second threshold value during a predetermined period of time, the control member passes through The configuration is configured to send the power feed limit signal to the power feed unit for the vehicle, wherein the second threshold is set to be lower than the first threshold. A power feeding system as claimed in claim 12, wherein The predetermined time period is set to be longer than the first time period. The power feeding system of claim 12, wherein the second threshold is set to be equal to or greater than the current rating. The power feeding system of claim 1, wherein the measured current value becomes lower than a period of time during a certain period of time when the power feeding unit for the vehicle reduces the current supplied to the electric vehicle The control member is configured to generate a power feed limit cancel signal when one of the first thresholds is low, the power feed limit cancel signal includes canceling the limit on the power supplied to the electric vehicle An instruction of the power feeding unit for a vehicle is configured to cancel a restriction on the power supplied to the electric vehicle based on the power feed restriction cancellation signal. A power feeding system for a vehicle according to claim 15, wherein the third threshold is set to be lower than the current rating. A power feeding system for a vehicle according to claim 1, wherein the measuring current value is within a certain period of time when the power feeding unit for the vehicle stops supplying the power to the electric vehicle The control member is configured to generate a power feed limit cancellation signal when it becomes lower than a third threshold below one of the first thresholds, The power feed limit cancellation signal includes an instruction to cancel a restriction on the power supplied to the electric vehicle, wherein the power feed unit for the vehicle is configured to cancel a supply cancellation to the electric vehicle based on the power feed limit cancellation signal The limitation of this power. The power feeding system of claim 17, wherein the third threshold is set to be lower than the current rating. The power feeding system of claim 1, wherein the power feeding unit for the vehicle limits the current supplied to the electric vehicle when the control member generates the power feeding restriction signal, thereby causing the main current to become This current rating is low. A power feeding system for a vehicle according to claim 1, wherein the control member is a control unit disposed within the power feeding unit for the vehicle. A power feeding system for a vehicle according to claim 1, wherein the control member is a control device. A power feeding system for a vehicle according to claim 1, wherein the power feeding system for the vehicle is configured to supply the power to a first electrical device and a second electrical device, wherein The control component is configured to prioritize one of the first electrical devices to a first order of priority, the control component configured to prioritize one of the second electrical devices to a second order of priority, The control member is configured to determine one of the electric vehicle priorities as a third order priority, the third order priority being lower than the second order priority, the second order priority being lower than the first order a priority, wherein when the control member generates the power feed limit signal, the power feeding unit for the vehicle is configured to limit the current supplied to the electric vehicle having the third order priority, wherein when The control member is configured to recognize a first restriction condition when the power feeding unit of the vehicle limits the current supplied to the electric vehicle, wherein when the control member generates the power feed restriction signal under the first restriction condition, the The power feeding unit of the vehicle limits the power supplied to the second electrical device having the second order of priority. The power feeding system for a vehicle of claim 1, the power feeding system for a vehicle configured to supply power to a plurality of electrical devices, wherein the control member is configured to determine each of the electrical devices One of the one Prioritizing, the control component is configured to determine a priority of the electric vehicle as a lowest order priority among the electric vehicle and the electrical devices, wherein when the control member generates the power feed limit signal, The power feeding unit for a vehicle is configured to limit the power supplied to the electric vehicle having the lowest order priority, wherein the power feeding unit for the vehicle limits supply to the electric motor having the lowest order priority The control member is configured to recognize a first limiting condition when the power of the vehicle is configured, wherein the power feeding unit for the vehicle is configured to when the control member generates the power feeding limit signal under the first limiting condition The power supplied to the electrical device is limited in the order from the electrical device having the lowest order priority to the electrical device having the highest order priority among the plurality of electrical devices.