JP2017051039A - Power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device which can continuously supply power to a load by changing over a power supply source.SOLUTION: A power supply device 100, including a plurality of vehicle connection units 1-1, 1-2, 1-3, a load connection unit 2 and a power supply unit 3, further includes a changeover control unit 14 which changes over a power supply source, on the basis of a storage battery voltage acquired from vehicles A, B, C having loaded storage batteries. The changeover control unit 14 calculates, at power supply, a difference between the battery voltage of a power supply vehicle A which is a power supply source, and the battery voltage of non-power supply vehicles B, C which are non-power supply sources, and if the difference ranges within in a preset first prescribed range, changes over the power supply source from the power supply vehicle A to the non-power supply vehicle B or the non-power supply vehicle C.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power feeding apparatus that feeds power to a load by using electric power of a vehicle equipped with a storage battery or a portable storage battery.

  As a power supply device that supplies power to a load using the power of a vehicle equipped with a storage battery, for example, the one described in Patent Document 1 is known. Since the power supply device described in Patent Document 1 is mounted on a vehicle equipped with a storage battery, not only power is supplied to a load (for example, an electrical appliance) at home, but also at a place away from home such as a campsite. Can be powered.

JP 2014-64457 A

  However, since the power supply apparatus described in Patent Document 1 cannot switch the power supply source, even if there are a plurality of vehicles equipped with storage batteries, power cannot be continuously supplied to the load.

  This invention is made | formed in view of the said situation, The place made into the subject is providing the electric power feeder which can supply electric power to a load by switching an electric power feeding source continuously.

In order to solve the above-described problem, a power supply device according to the present invention includes:
A plurality of vehicle connections connected to a plurality of storage battery-equipped vehicles on a one-to-one basis;
A load connection to which a load is connected; and
A power supply unit that generates power supply power based on a DC voltage of a power supply source vehicle among the plurality of storage battery mounted vehicles, and that supplies power to the load by the power supply power;
A power supply device comprising:
A storage control unit that acquires storage battery voltage from the plurality of storage battery-equipped vehicles and performs switching of the power supply source based on the storage battery voltage,
The switching control unit calculates a difference between the storage battery voltage of the power supply vehicle as the power supply source and the storage battery voltage of the non-power supply vehicle as the non-power supply source at the time of power supply, and the difference is within a first specified range set in advance. When included, the power supply source is switched from the power supply vehicle to the non-power supply vehicle.

  According to this configuration, since the plurality of vehicle connection portions connected to the plurality of storage battery-equipped vehicles on a one-to-one basis are provided, the power supply source can be switched to continuously supply power to the load. Further, according to this configuration, since the power supply source is switched when the difference between the storage battery voltage of the power supply vehicle and the storage battery voltage of the non-power supply vehicle is included in the first specified range, the fluctuation of the input voltage to the power supply unit at the time of switching As a result, adverse effects on the power feeding unit and the load at the time of switching can be reduced. Here, the vehicle equipped with a storage battery is not limited to a vehicle equipped with a storage battery that supplies vehicle driving power, but includes a vehicle equipped with a portable storage battery.

In the above power supply device,
Even if the difference is not included in the first specified range, the switching control unit, when the load current output from the load connection unit is included in a preset second specified range, It is preferable to switch the power supply source to the non-powered vehicle.

  According to this configuration, since the power supply source is switched when the load current is included in the second specified range, it is possible to reduce an adverse effect on the load due to a change in the load current at the time of switching. Further, according to this configuration, even when the difference between the storage battery voltage of the power supply vehicle and the storage battery voltage of the non-power supply vehicle is not included in the first specified range, the power supply source can be switched.

In the above power supply device,
When the non-powered vehicle includes a plurality of vehicles,
The switching control unit
Calculating the difference for each of the non-powered vehicles;
When at least one of the differences is included in the first specified range, the power supply source is switched to a vehicle having the highest storage battery voltage among the non-powered vehicles in which the difference is included in the first specified range.
Even when all the differences are not included in the first specified range, when the load current is included in the second specified range, the storage battery voltage is the highest among the non-powered vehicles. It can be configured to switch to a higher vehicle.

  According to this configuration, the power supply time can be extended by switching the power supply source to a vehicle having the highest storage battery voltage.

In the above power supply device,
When switching the power supply source, the switching control unit presets the SOC of the storage battery of the power supply vehicle until the storage battery voltage of the power supply vehicle becomes equal to or lower than a preset voltage value. It is preferable that the power supply source not be switched until the threshold value is reached or until a preset time elapses after the power supply source is switched.

  According to this configuration, it is possible to adjust the frequency of switching the power supply source and prevent the power supply source from being switched excessively.

In the above power supply device,
A switching unit interposed in a power line connecting the plurality of vehicle connection units and the power supply unit;
The switching unit, under the control of the switching control unit, brings a vehicle connection unit connected to the power supply source vehicle and the power supply unit into a conductive state, and a vehicle connection unit connected to the non-power supply source vehicle. The power feeding unit can be configured to be in a non-conducting state.

  ADVANTAGE OF THE INVENTION According to this invention, the electric power feeder which can supply electric power to a load by switching an electric power feeding source can be provided.

It is a block diagram which shows the structure of the electric power feeder of this invention. 3 is a flowchart of power source switching control according to the present invention.

  Hereinafter, an embodiment of a power feeding device according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows a power supply apparatus 100 according to an embodiment of the present invention. In FIG. 1, a solid line between elements constituting the power supply apparatus 100 indicates a power line, and a broken line between elements indicates a communication line (for example, a CAN communication line).

  The power supply apparatus 100 includes a plurality (three in this embodiment) of vehicle connection units 1-1, 1-2, and 1-3, a load connection unit 2, a power supply unit 3, a switching unit 4, and a control unit. 10 and supplies power to a load (not shown) connected to the load connection unit 2 using the power of the storage battery-equipped vehicles A to C. The storage battery-equipped vehicles A to C are, for example, electric vehicles equipped with chargeable / dischargeable storage batteries. The load is, for example, an electric appliance.

  The vehicle connection units 1-1, 1-2, and 1-3 are configured to be connected to the storage battery-equipped vehicles A to C on a one-to-one basis. In FIG. 1, the vehicle connection unit 1-1 is connected to the storage battery mounted vehicle A, the vehicle connection unit 1-2 is connected to the storage battery mounted vehicle B, and the vehicle connection unit 1-3 is connected to the storage battery mounted vehicle C. . The vehicle connection units 1-1, 1-2, and 1-3 may be configured with connectors corresponding to a single standard (for example, the CHAdeMO standard), or different standards (for example, the vehicle connection unit 1-1). 1-2 may be configured by a connector corresponding to the CHAdeMO standard and the vehicle connection unit 1-3 is compatible with the SAE standard).

  The load connection unit 2 is configured to be able to connect at least one load. Specifically, the load connection unit 2 includes at least one outlet for inserting a plug of the load.

  The power supply unit 3 performs a DC / AC conversion operation for generating an AC voltage (for example, AC 200 [V]) based on the input DC voltage (for example, DC 150 to 450 [V]), and supplies the AC voltage to the load with the AC voltage. It is comprised so that it may feed. The power feeding unit 3 includes, for example, a DC / AC inverter that performs the DC / AC conversion operation. As for the electric power feeding part 3, the alternating current side is connected to the load connection part 2, and the direct current | flow side is connected to the vehicle connection parts 1-1, 1-2, and 1-3 via the switching part 4. FIG. When the connected load is a device that operates with direct current, the power feeding unit 3 may include a DC / DC converter.

  As described above, the switching unit 4 is interposed in the power line that connects the vehicle connection units 1-1, 1-2, 1-3 and the power feeding unit 3, and the power line is brought into a conductive state under the control of the control unit 10. It is comprised so that it may switch to a non-conduction state. The switching unit 4 includes, for example, three relays that operate under the control of the control unit 10 and are interposed in the power lines that connect the vehicle connection units 1-1, 1-2, 1-3 and the power feeding unit 3. Composed. When the control unit 10 selects the storage battery mounted vehicle A as the power supply source vehicle and selects the storage battery mounted vehicles B and C as the non-power supply source vehicle, the switching unit 4 includes the vehicle connection unit 1-1 and the power supply unit 3. Are connected to each other, and the power lines connecting the vehicle connecting units 1-2, 1-3 and the power feeding unit 3 are set to a non-conducting state. When the power line connecting the vehicle connection unit 1-1 and the power supply unit 3 is in a conductive state, the storage battery-equipped vehicle A becomes a power supply vehicle (power supply vehicle), and power is supplied to the vehicle connection units 1-2 and 1-3. When each power line connecting the units is in a non-conductive state, the storage battery-equipped vehicles B and C become non-power-feeding vehicles (non-power-feeding vehicles).

  The control unit 10 includes a communication unit 11, a current monitoring unit 12, a power supply control unit 13, and a switching control unit 14. The control unit 10 is configured by a microcomputer, for example. The control unit 10 communicates with the vehicle connection units 1-1, 1-2, 1-3, the load connection unit 2, the power feeding unit 3, and the switching unit 4.

  The communication unit 11 communicates with the storage battery-equipped vehicles A to C via the vehicle connection units 1-1, 1-2, and 1-3, and the storage battery information about the installed storage battery from the storage battery mounted vehicles A to C Obtain command information such as a power feed command. The storage battery information includes information such as storage battery voltage and SOC (charge amount). The communication unit 11 outputs information acquired from each of the storage battery mounted vehicles A to C to the power supply control unit 13 and the switching control unit 14.

  The current monitoring unit 12 communicates with the load connection unit 2 (a current sensor provided in the load connection unit 2), and acquires information on a current output to the load (hereinafter referred to as “load current”). The current monitoring unit 12 outputs information about the acquired load current to the power supply control unit 13 and the switching control unit 14.

  The power supply control unit 13 performs power supply control for controlling the DC / AC conversion operation of the power supply unit 3. The maximum value of the current output from the power supply unit 3, that is, the maximum value of the load current varies depending on the number and type of loads connected to the load connection unit 2. For example, when a load with high power consumption (for example, a microwave oven or a vacuum cleaner) is connected to the load connection unit 2, the maximum value of the load current increases. The power supply control unit 13 protects the power supply unit 3 by stopping the DC / AC conversion operation of the power supply unit 3 when the maximum value of the load current exceeds a preset threshold value.

  The switching control unit 14 controls the switching unit 4. Specifically, the switching control unit 14 performs switching control of the power supply source based on each storage battery voltage or load current of the storage battery mounted vehicles A to C at the time of power supply. The switching control unit 14 performs power supply source switching control so that the power supply source vehicle is always one.

  FIG. 2 shows a flowchart of power source switching control. The control unit 10 determines the power supply switching destination according to the flowchart shown in FIG. When the power supply control unit 13 starts the power supply control and the power supply preparation is completed, the switching control unit 14 starts the power supply source switching control. The power supply control unit 13 starts power supply control when receiving a power supply command from at least one vehicle connected to the vehicle connection units 1-1, 1-2, and 1-3.

  Based on the information acquired from the communication unit 11, the switching control unit 14 that has started the power source switching control determines whether there are a plurality of vehicles connected to the vehicle connection units 1-1, 1-2, 1-3. The first determination is performed (S1). The switching control unit 14 determines that there are a plurality of vehicles when acquiring information about two or more vehicles from the communication unit 11 (YES in S1). On the other hand, when acquiring information related to only one vehicle from the communication unit 11, the switching control unit 14 determines that there are not a plurality of vehicles (NO in S1), and performs the first determination again (S1). In addition, even if there is one vehicle connected to the vehicle connection units 1-1, 1-2, and 1-3, when the one vehicle can supply power, the power supply unit 3 The power supply to the load is started using the power of.

  The switching control unit 14 that has determined that there are a plurality of vehicles in the first determination (YES in S1), based on the storage battery information acquired from the communication unit 11, the storage battery of the non-power supply source vehicle with respect to the storage battery voltage of the power supply source vehicle A difference from the voltage is calculated, and it is determined whether or not the difference is greater than 0 (S2). When the difference is larger than 0 (YES in S2), the switching control unit 14 performs a second determination as to whether or not the difference is equal to or less than a preset first specified value (S3).

  For example, when the vehicle connection unit 1-1 is connected to the storage battery-equipped vehicle A before the start of power supply, and the vehicle connection units 1-2 and 1-3 are connected to the storage battery-equipped vehicles B and C after the start of power supply, the storage battery-equipped vehicle A is a power supply vehicle (power supply vehicle), and storage battery-equipped vehicles B and C are non-power supply vehicles (non-power supply vehicles). In this case, the switching control unit 14 calculates a difference between the storage battery voltage of the storage battery-equipped vehicle B and the storage battery voltage of the storage battery-equipped vehicle A (hereinafter referred to as “first difference”), and the storage battery of the storage battery-equipped vehicle A. The difference between the storage battery voltage of the storage battery-equipped vehicle C with respect to the voltage (hereinafter referred to as “second difference”) is calculated, and whether each of the first difference and the second difference is greater than 0 is determined. It is determined, and it is determined only for a difference larger than 0 whether or not the difference is equal to or less than the first specified value.

  If the input voltage of the power feeding unit 3 fluctuates beyond a predetermined range, not only will the load be applied to the power feeding unit 3, but the load current may fluctuate and adversely affect the load. Therefore, in the present embodiment, the first specified value is set to a value that does not cause the load current to fluctuate, or a value that falls within a range in which fluctuation of the load current does not adversely affect the load. In addition, since the switching control unit 14 calculates the difference by subtracting the storage battery voltage of the power supply source vehicle from the storage battery voltage of the non-power supply source vehicle, the switch control unit 14 switches the power supply source to a vehicle with a high storage battery voltage. The specified value is set to a positive value. Specifically, the first specified value is set to 5 to 10 [V]. In this embodiment, a range that is greater than 0 and equal to or less than the first specified value corresponds to the “first specified range” of the present invention.

  When at least one of the first difference or the second difference is equal to or less than the first specified value, that is, when at least one difference is equal to or less than the first specified value (YES in S3), the switching control unit 14 Switching processing is performed (S5). On the other hand, when both the first difference and the second difference are larger than the first specified value, that is, when all the differences are larger than the first specified value (NO in S3), the switching control unit 14 Based on the information regarding the load current acquired from the monitoring unit 12, a third determination is made as to whether or not the maximum value of the load current is equal to or less than a preset second specified value (S4).

  When the maximum value of the load current is larger than the second specified value (NO in S4), the switching control unit 14 performs the first determination again (S1). On the other hand, when the maximum value of the load current is equal to or less than the second specified value (YES in S4), the switching control unit 14 performs a power supply source switching process (S5).

  Here, when both the first difference and the second difference are larger than the first specified value (NO in S3), when the power source is switched from the storage battery mounted vehicle A to the storage battery mounted vehicle B or the storage battery mounted vehicle C, As described above, the output current of the power feeding unit 3 may vary. However, when the load current is small (YES in S4), in other words, when the power consumption of the load is small, even if the load current fluctuates, the load is hardly affected. Therefore, in the present embodiment, the second specified value is set in a range that hardly affects the load even if it fluctuates. Specifically, the second specified value is set to 1 [A]. Note that setting the second specified value to 1 [A] is synonymous with setting the “second specified range” of the present invention to 0 to 1 [A].

The switching control unit 14 performs the power source switching process (S5) as follows.
(1) When the first difference is equal to or less than the first specified value (YES in S3), the switching control unit 14 switches the power supply source from the storage battery mounted vehicle A to the storage battery mounted vehicle B (S5).
(2) When the second difference is equal to or less than the first specified value (YES in S3), the switching control unit 14 switches the power supply source from the storage battery mounted vehicle A to the storage battery mounted vehicle C (S5).
(3) When both the first difference and the second difference are equal to or less than the first specified value (YES in S3), the switching control unit 14 changes the power supply source from the storage battery mounted vehicle A to the storage battery mounted vehicles B and C. Switch to the vehicle with the higher storage battery voltage (S5).
(4) When both the first difference and the second difference are larger than the first specified value (NO in S3) and the maximum value of the load current is equal to or less than the second specified value (YES in S4), switching control The unit 14 switches the power supply source from the storage battery-equipped vehicle A to the vehicle having the higher storage battery voltage among the storage battery-equipped vehicles B and C (S5).

  In the power supply source switching process (S5), in (3) and (4) above, the power supply source is switched to the vehicle having the higher storage battery voltage in preference to increasing the power supply time. When priority is given to reducing the burden on the power supply unit 3 by suppressing fluctuations in the input voltage to the power supply, the power supply source may be switched to a vehicle whose storage battery voltage is closer to the storage battery voltage of the power supply vehicle.

  In the second and subsequent power supply source switching processing (S5), the switching control unit 14 determines that the SOC of the storage battery of the power supply source vehicle remains until the storage battery voltage of the power supply source vehicle is equal to or lower than a preset voltage value. The power supply source is not switched until it becomes equal to or less than a preset threshold value or until a preset set time elapses after the power supply source is switched. Thereby, it is possible to prevent excessive switching of the power supply source. Further, by appropriately adjusting the set voltage value, the set threshold value, or the set time, the frequency of switching the power supply source can be adjusted.

  The switching control unit 14 repeatedly performs the series of power supply source switching control (S1 to S5) until the power supply control unit 13 stops the power supply control.

  As a result, according to the power supply device 100 according to the present embodiment, not only can the power supply source be switched during power supply to continuously supply power to the load, but also fluctuations in the input voltage to the power supply unit 3 during switching can be suppressed. Thus, adverse effects on the power feeding unit 3 and the load can be reduced.

  As mentioned above, although embodiment of the electric power feeder which concerns on this invention was described, this invention is not limited to the said embodiment.

  The power supply apparatus 100 according to the embodiment includes the three vehicle connection units 1-1, 1-2, and 1-3. However, the power supply apparatus according to the present invention includes at least two vehicle connection units. That's fine.

  In addition to the DC / AC conversion operation, the power supply unit 3 can be configured to perform an AC / DC conversion operation for generating a DC voltage based on an AC voltage input from the outside (for example, a system). According to this configuration, in addition to supplying power to the load, it is possible to charge the storage battery mounted on the storage battery mounted vehicles A to C. Moreover, when supplying direct-current power to load, the electric power feeding part 3 should just perform DC / DC conversion operation | movement. In other words, the power supply unit 3 only needs to be able to generate power supply based on the DC voltage.

  The power supply apparatus 100 according to the embodiment includes the switching unit 4. For example, in the vehicle connection units 1-1, 1-2, and 1-3, the power supply source vehicle and the power supply unit 3 are brought into conduction. If the non-power supply source vehicle and the power supply unit 3 can be brought into a non-conductive state, the switching unit 4 can be omitted.

  The control unit 10 according to the above embodiment includes a communication unit 11, a current monitoring unit 12, a power supply control unit 13, and a switching control unit 14, but the storage battery voltage acquired from the storage battery mounted vehicles A to C is used. If the power supply source switching control is performed based on this, the configuration can be changed as appropriate. For example, the switching control unit 14 may have at least one function of the communication unit 11, the current monitoring unit 12, or the power supply control unit 13.

  In the above embodiment, the first specified value is set to a positive value, but the switching control unit 14 calculates the difference by subtracting the storage battery voltage of the non-power supply source vehicle from the storage battery voltage of the power supply source vehicle. The first specified value is set to a negative value. In this case, the switching control unit 14 determines whether or not the difference is smaller than 0 in the determination in step S2. Further, in the present invention, as the second determination (S3), it is determined whether or not the difference between the storage battery voltage of the power supply source vehicle and the storage battery voltage of the non-power supply source vehicle is included in the preset first specified range. May be performed. In this case, the first specified range can be set to, for example, −10 to 10 [V], and the determination in step S2 can be omitted.

  Although the switching control unit 14 of the above embodiment performs the third determination (S4) as to whether or not the maximum value of the load current is equal to or less than the second specified value, the third determination may be omitted. Thereby, although the switching conditions of the power supply source are narrowed, fluctuations in the input voltage to the power supply unit 3 at the time of switching the power supply source can be reliably suppressed, and the burden on the power supply unit 3 can be further reduced. .

  In the embodiment described above, the switching control unit 14 performs switching control of the power supply source so that the power supply source vehicle is always one, but the power supply source vehicle may be a plurality.

  In the said embodiment, although the storage battery mounting vehicle is connected to the switch part, you may connect a portable storage battery.

1-1, 1-2, 1-3 Vehicle connection unit 2 Load connection unit 3 Power supply unit 4 Switching unit 10 Control unit 11 Communication unit 12 Current monitoring unit 13 Power supply control unit 14 Switching control unit 100 Power supply device

Claims (5)

A plurality of vehicle connections connected to a plurality of storage battery-equipped vehicles on a one-to-one basis;
A load connection to which a load is connected; and
A power supply unit that generates power supply power based on a DC voltage of a power supply source vehicle among the plurality of storage battery mounted vehicles, and that supplies power to the load by the power supply power;
A power supply device comprising:
A storage control unit that acquires storage battery voltage from the plurality of storage battery-equipped vehicles and performs switching of the power supply source based on the storage battery voltage,
The switching control unit calculates a difference between the storage battery voltage of the power supply vehicle as the power supply source and the storage battery voltage of the non-power supply vehicle as the non-power supply source at the time of power supply, and the difference is within a first specified range set in advance. When included, the power supply device switches the power supply source from the power supply vehicle to the non-power supply vehicle. Even if the difference is not included in the first specified range, the switching control unit, when the load current output from the load connection unit is included in a preset second specified range, The power supply apparatus according to claim 1, wherein the power supply source is switched to the non-powered vehicle. When the non-powered vehicle includes a plurality of vehicles,
The switching control unit
Calculating the difference for each of the non-powered vehicles;
When at least one of the differences is included in the first specified range, the power supply source is switched to a vehicle having the highest storage battery voltage among the non-powered vehicles in which the difference is included in the first specified range.
Even when all the differences are not included in the first specified range, when the load current is included in the second specified range, the storage battery voltage is the highest among the non-powered vehicles. The power feeding device according to claim 2, wherein the power feeding device is switched to a higher vehicle. When switching the power supply source, the switching control unit presets the SOC of the storage battery of the power supply vehicle until the storage battery voltage of the power supply vehicle becomes equal to or lower than a preset voltage value. The switching of the power supply source is not performed until the threshold value is reached or until a preset time elapses after the power supply source is switched. Power supply device. A switching unit interposed in a power line connecting the plurality of vehicle connection units and the power supply unit;
The switching unit, under the control of the switching control unit, brings a vehicle connection unit connected to the power supply source vehicle and the power supply unit into a conductive state, and a vehicle connection unit connected to the non-power supply source vehicle. The power feeding device according to claim 1, wherein the power feeding unit is brought into a non-conductive state.

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