JP6260194B2 - Power storage device, power storage system, and method for controlling power storage device - Google Patents

Description

  The present invention relates to a power storage device, a power storage system, and a method for controlling a power storage device, and more particularly to a power storage device that can be connected to a commercial power supply, a power storage system, and a method for controlling the power storage device.

  A system for supplying stable electric power in homes and general offices by combining a large-capacity power storage device with a commercial power source, a solar cell, or the like has been developed. An example of such a power supply system is described in Patent Document 1. FIG. 8 shows a block diagram of a related power supply system 10 described in Patent Document 1.

  The related power supply system 10 includes a linkage panel 11, a power conditioner 12, a solar battery 13, a charge / discharge unit 14, a storage battery unit 15, a power measurement unit 16, a switching box 18, and a connection box 19.

  The link board 11 is connected to a single-phase three-wire 200V / 100V main line Wa1 and is supplied with commercial power from the power supply PS of the power company via the main line Wa1. The linkage panel 11 houses a main power breaker 11a, a branch breaker 11b, and a solar power breaker 11c. The main electric line Wa1 branches into a plurality of branch electric paths Wa2 via the branch breakers 11b. A device K1 such as a lighting device, an air conditioner, or a home appliance is connected to the branch circuit Wa2.

  The power conditioner 12 and the solar cell 13 constitute a solar power generation device. The DC power generated by the solar cell 13 by sunlight is supplied to the power conditioner 12 through the connection box 19 and is converted into AC power by the power conditioner 12.

  The charge / discharge unit 14 and the storage battery unit 15 constitute a power storage device. The charge / discharge unit 14 is connected to the branch breaker 11b of the link board 11 via the branch circuit Wa2, and converts the AC power supplied via the link board 11 into DC power to charge the storage battery unit 15. Moreover, the charging / discharging unit 14 converts the DC power stored in the storage battery unit 15 into AC power, and supplies the AC power to the device K2 via the AC electric circuit Wa4.

  Based on the power measurement data at each location in the figure, the power measurement unit 16 is in a normal time when the commercial power source PS supplies commercial power and in a power failure when the commercial power supply is stopped from the commercial power source PS. To determine.

  During normal times when the commercial power source PS supplies commercial power, the power conditioner 12 supplies AC power via the linkage panel 11. However, the AC power generated from the power generated by the solar cell 13 is not supplied to the self-supporting outlet 12 b provided in the power conditioner 12. The switching box 18 switches the connection destination of the AC electric circuit Wa5 to the branch electric circuit Wa2.

  In the event of a power failure when the commercial power supply PS stops supplying commercial power, the power conditioner 12 supplies AC power generated from the power generated by the solar cell 13 to the self-supporting outlet 12b. Thereby, the storage battery unit 15 can be charged by solar power generation. The charge / discharge unit 14 converts the DC power stored in the storage battery unit 15 into AC power, and supplies the AC power to the self-supporting outlet 14j. And the switching box 18 switches the connection destination of AC electric circuit Wa5 to AC electric circuit Wa4. Therefore, at the time of a power failure, the operating power of the device K2 connected to the AC power line Wa5 is supplied from the storage battery unit 15 via the charge / discharge unit 14.

  In this way, even when the commercial power source PS is out of power, the storage battery unit 15 can be charged by solar power generation by supplying the charging power of the storage battery unit 15 from the self-standing outlet 12b of the power conditioner 12. Therefore, according to the related power supply system 10, the power supply capability at the time of a power failure can be improved.

International Publication No. 2012/165365 ([0029] to [0061])

  In the power storage device provided in the related power supply system 10 described above, when installed in a home or the like, it is necessary to perform electrical work for connection to the branch breaker 11b of the linkage panel 11. In addition, the charging / discharging unit 14 of the associated power storage device is connected to the AC electric circuit Wa5 via a dedicated self-supporting outlet 14j and a switching box 18. Therefore, it is necessary to separately provide the AC electric circuit Wa5 and the switching box 18 separately from the branch electric circuit Wa2 that is always connected to the commercial power source PS.

  As described above, since the related power storage device requires electrical work or a dedicated electric circuit, there is a problem that it is difficult to easily install and use the related power storage device in a home or general office. It was.

  An object of the present invention is to solve the above-described problem that it is difficult to simply install and use a power storage device in a home or a general office, and a power storage device, a power storage system, and a method for controlling the power storage device Is to provide.

  The power storage device of the present invention includes an insertion plug that can be inserted into and removed from a plug receptacle provided in an electric circuit connected to a commercial power source, and an insertion plug connection detection unit that detects a connection state between the insertion plug and the plug receptacle, Based on the commercial power supply monitoring means for monitoring the power supply state from the commercial power supply, the storage battery unit provided with the battery module, the detection result of the insertion plug connection detection means and the monitoring result of the commercial power supply monitoring means Power control means for controlling charging / discharging of the storage battery unit performed via

  The power storage system of the present invention includes a power storage device, a system controller, and a distribution board, and the power storage device is an insertion plug that can be inserted into and removed from a plug receiver provided in an electric circuit connected to a commercial power source, Insertion plug connection detection means for detecting the connection state between the insertion plug and the plug receptacle, commercial power supply monitoring means for monitoring the power supply state from the commercial power supply, a storage battery unit having a battery module, and an insertion plug connection Power control means for controlling charging / discharging of the storage battery unit performed via the plug based on the detection result of the detection means and the monitoring result of the commercial power supply monitoring means, and the distribution board is connected to the commercial power supply The system controller includes a power supply voltmeter, a power supply breaker, and a power supply ammeter, and the system controller instructs the power control means to charge / discharge based on the detected value of the power supply ammeter. .

  The power storage device control method of the present invention monitors the power supply state of the power supplied from the commercial power source to the power storage device via the plug, and receives the plug receiver and the plug receiver provided on the electric circuit connected to the commercial power source. The connection state of the plug that can be inserted into and removed from the plug is detected, and charging / discharging of the storage battery included in the power storage device that is performed through the plug is controlled based on the connection state detection result and the power supply state monitoring result. .

  According to the power storage device, the power storage system, and the control method for the power storage device of the present invention, the power storage device can be easily installed and used in a home or a general office.

It is a block diagram which shows the structure of the electrical storage apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the electrical storage apparatus which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the structure of the DC / AC converter with which the electrical storage apparatus which concerns on the 2nd Embodiment of this invention is provided. It is the schematic which shows the structure of the insertion plug with which the electrical storage apparatus which concerns on the 3rd Embodiment of this invention is equipped, (a) is the state where the insertion plug is not attached to the plug receptacle, (b) is the insertion plug. Shows a state where is attached to the plug receiver. It is a block diagram which shows the structure of the electrical storage system which concerns on the 4th Embodiment of this invention. It is a block diagram which shows the structure of the electricity distribution panel with which the electrical storage system which concerns on the 4th Embodiment of this invention is provided. It is a block diagram for demonstrating operation | movement of the electrical storage system which concerns on the 4th Embodiment of this invention. It is a block diagram which shows the structure of the related electric power supply system.

  Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment]
FIG. 1 is a block diagram showing a configuration of a power storage device 100 according to the first embodiment of the present invention. The power storage device 100 includes an insertion plug 110, an insertion plug connection detection unit 120, a commercial power supply monitoring unit 130, a storage battery unit 140, and a power control unit 150.

  The plug 110 can be inserted into and removed from a plug receptacle 22 such as an outlet provided on the electric circuit 21 connected to the commercial power source 20. The plug connector 110 and the plug receiver 22 constitute a plug connector, and the plug plug 110 can be connected to and disconnected from the plug holder 22 by simply connecting and disconnecting the wiring. The plug 24 of the electric device 25 can be connected to another plug receiver 23 provided in the electric circuit 21. The shapes of the plug 110 and the plug receptacle 22 are determined by the industrial standards of each country, and those used in Japanese homes and general offices are defined by Japanese Industrial Standards (JIS C 8303).

  The insertion plug connection detection means 120 detects the connection state between the insertion plug 110 and the plug receiver 22. The commercial power supply monitoring unit 130 monitors the power supply state from the commercial power supply 20. The storage battery unit 140 includes a battery module. Then, the power control unit 150 controls charging / discharging of the storage battery unit 140 performed via the plug 110 based on the detection result of the plug plug connection detection unit 120 and the monitoring result of the commercial power supply monitoring unit 130.

  Next, the method for controlling the power storage device according to the present embodiment will be described. In the power storage device control method of the present embodiment, first, the power supply state of the power supplied from the commercial power source to the power storage device via the plug is monitored. Moreover, the connection state of the plug receptacle provided in the electrical circuit connected to the commercial power source and the plug that can be inserted into and removed from the plug receptacle is detected. And based on the detection result of a connection state, and the monitoring result of an electric power supply state, charging / discharging of the storage battery with which the electrical storage apparatus is performed through an insertion plug is controlled.

  As described above, in the power storage device 100 and the method for controlling the power storage device according to the present embodiment, the plug is based on the detection result of the connection state of the plug and the monitoring result of the power supply state from the commercial power supply. It is set as the structure which controls charging / discharging of the storage battery performed via this. Therefore, it is possible to prevent the storage battery from being discharged through the plug plug 110 in a state where the plug plug 110 is not attached to the plug receiver 22. Furthermore, it is possible to avoid a single operation in which the storage battery is discharged in a state where power is not supplied from the commercial power supply 20, and to prevent the power from the storage battery from flowing backward to the power system of the commercial power supply.

  Thus, according to the power storage device and the method for controlling the power storage device according to the present embodiment, the safety of the power storage device can be sufficiently ensured. For this reason, dedicated wiring and electrical work are not required, and it is only necessary to attach the plug to a plug receptacle such as an outlet. Therefore, the power storage device can be easily installed and used in a home or general office.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. FIG. 2 is a block diagram showing a configuration of a power storage device 200 according to the second embodiment of the present invention. The power storage device 200 includes a power conditioner 201, a battery management unit (BMU) 202, a battery module 203, and an insertion plug 210. The battery management unit (BMU) 202 and the battery module 203 constitute a storage battery unit. Further, the power storage device 200 and the system controller 30 constitute a power storage system.

  The power conditioner 201 includes a control unit 220, an insertion plug voltmeter 230, an ammeter 240, a first switch 250, an AC / DC converter 260, a DC / AC converter 270, and a second switch 280.

  The insertion plug voltmeter 230 constitutes an insertion plug connection detecting means, and detects an insertion plug voltage which is a voltage between insertion blades constituting the insertion plug 210.

  The AC / DC converter 260 operates as AC / DC converting means for converting AC power input from the plug 210 into DC power. The DC / AC converter 270 operates as a DC / AC converter that converts DC power input from the battery module 203 constituting the storage battery unit into AC power.

  The first switch 250 switches the connection state between the plug 210 and the AC / DC converter 260 as the AC / DC converter and the DC / AC converter 270 as the DC / AC converter as the first switch. . The second switch 280 includes, as a second switching unit, a battery module 203 constituting a storage battery unit, an AC / DC converter 260 serving as an AC / DC converting unit, and a DC / AC converter 270 serving as a DC / AC converting unit. Switch the connection status.

  The control unit 220 controls the operations of the first switch 250 as the first switching means and the second switch 280 as the second switching means as the control means. Control unit 220 also receives a charge or discharge instruction sent by system controller 30 based on a predetermined condition.

  The AC / DC converter 260, the DC / AC converter 270, the first switch 250, the second switch 280, and the control unit 220 described above constitute power control means.

  Next, the operation of each component of the power storage device 200 according to the present embodiment will be described in more detail.

  The plug plug voltmeter 230 detects the voltage of the AC power input from the plug 210 and transmits a detection value to the control unit 220.

  The control unit 220 controls the operation of the first switch 250 and the second switch 280 based on the charging or discharging instruction from the system controller 30 and the detected value from the plug-in plug voltmeter 230. When charging is instructed from the system controller 30, the following control is performed. That is, the first switch 250 and the second switch 250 are supplied so that AC power input from the plug 210 is supplied to the AC / DC converter 260 and DC power converted by the AC / DC converter 260 is supplied to the battery module 203. The switch 280 is switched.

  When discharge is instructed from the system controller 30 and the detected value of the plug plug voltmeter 230 satisfies a predetermined voltage waveform and a predetermined frequency, for example, when AC100V, 50 Hz or 60 Hz of a commercial power source is detected, Control like this. In this case, it can be determined that the plug 210 is attached to the plug receiver 22. Therefore, the DC power output from the battery module 203 is supplied to the DC / AC converter 270, and the AC switch converted by the DC / AC converter 270 is output from the plug 210 so that the first switch 250 and the second switch The switch 280 is switched.

  If discharge is instructed from the system controller 30 and the detected value of the plug plug voltmeter 230 does not satisfy a predetermined voltage value or a predetermined frequency, it is determined that the plug 210 is not attached to the plug receiver 22. Since this is possible, the first switch 250 is shut off.

  In addition, when receiving an instruction to stop charging from the battery management unit 202 at the time of charging, the control unit 220 blocks the second switch 280. On the other hand, when a discharge stop instruction is received from the battery management unit 202 at the time of discharging, the control unit 220 blocks the second switch 280.

  The first switch 250 takes the following state under the control of the control unit 220. That is, the AC power input from the plug 210 is supplied to the AC / DC converter 260 and the AC power output from the DC / AC converter 270 is supplied to the plug 210. Further, the AC power input from the plug 210 is connected to any one of the AC / DC converter 260 and the DC / AC converter 270, and three states are added including a state where the AC power is cut off.

  The second switch 280 takes the following state under the control of the control unit 220. That is, the DC power output from the AC / DC converter 260 is supplied to the battery module 203, and the DC power output from the battery module 203 is supplied to the DC / AC converter 270. Further, the DC power output from the battery module 203 is in three states including the state in which the DC power is cut off without being supplied to either the AC / DC converter 260 or the DC / AC converter 270.

  The AC / DC converter 260 converts the AC power input from the first switch 250 into DC power. The DC / AC converter 270 converts the DC power input from the second switch 280 into AC power.

  The battery module 203 is composed of one or a plurality of battery cells, stores electric power, and charges and discharges with a predetermined voltage and current. The battery management unit 202 monitors the voltage of the battery cells that constitute the battery module 203. When the monitored voltage exceeds a predetermined voltage during charging, the control unit 220 is instructed to stop charging. When the monitored voltage falls below the predetermined voltage during discharging, the control unit 220 is instructed to stop discharging.

  FIG. 3 shows the configuration of the DC / AC converter 270. The DC / AC converter 270 includes a DC power input unit 271, a DC voltmeter 272, a DC ammeter 273, a circuit breaker 274, an inverter 275, an AC ammeter 276, an AC voltmeter 277, a reactance 278, and an AC power output unit 279. .

  The DC voltmeter 272 detects the voltage of the DC power input from the DC power input unit 271 and transmits the detected value to the control unit 220. The DC ammeter 273 detects the current of the DC power input from the DC power input unit 271 and transmits the detected value to the control unit 220.

  The circuit breaker 274 shuts off the DC power input from the DC power input unit 271 to the inverter 275 and the DC power input from the DC power input unit 271 without being supplied to the inverter 275 under the control of the control unit 220. Switch between states. The inverter 275 converts the DC power input from the circuit breaker 274 into AC power having a predetermined voltage value and a predetermined frequency under the control of the control unit 220.

  AC ammeter 276 detects the current of the AC power output from inverter 275 and transmits the detected value to control unit 220. AC voltmeter 277 detects the voltage of AC power output from inverter 275 and transmits the detected value to control unit 220. The reactance 278 acts so that the phase of the AC power voltage output from the inverter 275 is advanced by 90 degrees from the phase of the AC power current output from the inverter 275.

  Here, the AC ammeter 276 and the control unit 220 constitute commercial power supply monitoring means. That is, the AC ammeter 276 detects a converted AC current that is an AC current output from a DC / AC converter 270 as a DC / AC converter. And the control part 220 outputs the result of having compared the phase change of the plug plug voltage, and the phase change of the converted alternating current as a monitoring result.

  Control unit 220 also controls inverter 275 so that the phase of the alternating voltage detected by plug-in plug voltmeter 230 and the phase of the alternating current detected by alternating current ammeter 276 substantially coincide. At this time, the control unit 220 controls the inverter 275 so that the phase of the alternating current slightly changes in order to cause a phase change. Here, when the phase change of the AC current detected by the AC ammeter 276 matches the phase change of the AC voltage detected by the plug-in plug voltmeter 230, it can be determined that AC power is not supplied from the commercial power source 20. . This is because the AC voltage (plug plug voltage) detected by the plug plug voltmeter 230 is a combination of the AC voltage output from the commercial power supply 20 and the inverter 275. At this time, the control unit 220 controls the first switch 250 to be shut off.

  Next, the operation of the power storage device 200 according to the present embodiment will be described.

  When the plug voltage detected by the plug plug voltmeter 230 does not satisfy a predetermined voltage value, the controller 220 determines that the plug 210 is not attached to the plug receiver 22. At this time, the first switch 250 is shut off so that AC power is not output from the plug 210.

  Further, the control unit 220 is configured so that the phase of the AC voltage detected by the plug-in plug voltmeter 230 and the phase of the AC current detected by the AC ammeter 276 substantially match and the phase of the AC current slightly changes. The inverter 275 is controlled. Here, when the phase change of the AC current detected by the AC ammeter 276 matches the phase change of the AC voltage detected by the plug-in plug voltmeter 230, the control unit 220 is not supplied with AC power from the commercial power supply 20. And the first switch 250 is shut off. That is, even when the plug 210 is attached to the plug receiver 22 and the discharge is instructed from the system controller 30, when the AC power is not supplied from the commercial power supply 20, the control unit 220. Controls so that AC power is not output from the plug 210. Therefore, it is possible to avoid a single operation in which the battery module 203 discharges in a state where power is not supplied from the commercial power source 20, and to prevent the power from the battery module 203 from flowing backward to the power system of the commercial power source.

  As described above, when the detection result of the plug-in plug detection means indicates a state where the plug-in plug and the plug receptacle are not connected, and the monitoring result of the commercial power monitoring means is not supplied with power from the commercial power source. In the case where the state is indicated, if it is at least one of the states, the control means performs the following control. That is, the control means controls the first switching means so that the first switching means does not connect the plug to either the AC / DC conversion means or the DC / AC conversion means. Further, the present invention is not limited to this, and in this case, the control means may stop the operation of the DC / AC conversion means. In this case, the power consumption of the power storage device can be reduced.

  Next, a case where the insertion plug 210 is attached to the plug receiver 22 and charging is instructed from the system controller 30 will be described. In this case, the control unit 220 supplies the AC power input from the plug 210 to the AC / DC converter 260, and the first switching is performed so that the DC power converted by the AC / DC converter 260 is supplied to the battery module 203. Switch 250 and second switch 280. As a result, the control unit 220 can control the battery module 203 to be charged with the power input from the plug 210.

  That is, the detection result of the insertion plug connection detection means indicates a state where the insertion plug and the plug receiver are connected, and the monitoring result of the commercial power supply monitoring means indicates that the power from the commercial power supply is supplied. If so, the control means performs the following control. That is, the control means includes the first switching means and the second switching means so that the first switching means connects the plug and the AC / DC conversion means, and the second switching means connects the storage battery unit and the AC / DC conversion means. The switching means is controlled.

  Next, the plug 210 is attached to the plug holder 22, the discharge is instructed from the system controller 30, and the phase change of the AC current detected by the AC ammeter 276 and the plug plug voltmeter 230 detect it. A case where the phase changes of the AC voltage do not match will be described. In this case, the control unit 220 determines that AC power is supplied from the commercial power supply 20. This is because the AC voltage (plug plug voltage) detected by the plug plug voltmeter 230 is a combination of the AC voltage output from the commercial power supply 20 and the inverter 275. Therefore, the controller 220 supplies the DC power output from the battery module 203 to the DC / AC converter 270, and outputs the AC power converted by the DC / AC converter 270 from the plug 210. And the second switch 280 are switched. Thereby, since the control part 220 can control so that the electric power which the battery module 203 outputs may be output from the plug 210, it supplies electric power from the electrical storage apparatus 200 when electric power is insufficient with only the commercial power source 20. It becomes possible.

  That is, the detection result of the insertion plug connection detection means indicates a state where the insertion plug and the plug receiver are connected, and the monitoring result of the commercial power supply monitoring means indicates that the power from the commercial power supply is supplied. If so, the control means performs the following control. That is, the control means includes the first switching means and the second switching means so that the first switching means connects the plug and the DC / AC conversion means, and the second switching means connects the storage battery unit and the DC / AC conversion means. The switching means is controlled.

  Next, effects of the power storage device 200 according to the present embodiment will be described.

  In the power storage device 200 of this embodiment, when the plug 210 is attached to the plug receiver 22 and AC power is supplied from the commercial power supply 20, AC power is supplied according to a discharge instruction from the system controller 30. The output is made from the plug 210. Therefore, it is possible to prevent the battery module 203 from being discharged through the plug plug 210 in a state where the plug plug 210 is not attached to the plug receiver 22. Thus, even when the insertion plug 210 is used, safety is sufficiently ensured, so that AC power can be supplied from the insertion plug 210 to the electric device 25 through the electric circuit 21 that is an existing wiring. . As a result, the power storage device can be easily installed and used in a home or a general office.

  Further, in the power storage device 200 of this embodiment, when the plug plug 210 is attached to the plug receiver 22 and AC power is not supplied from the commercial power supply 20, AC power is output from the plug plug 210. It is configured not to. Therefore, it is possible to avoid an isolated operation in which the storage battery is discharged in a state where power is not supplied from the commercial power source 20, and to prevent the power from the storage battery from flowing backward to the power system of the commercial power source.

  Next, the method for controlling the power storage device according to the present embodiment will be described.

  In the power storage device control method of the present embodiment, the detection result of the connection state between the plug receiver and the plug plug indicates a state in which the plug plug and the plug receiver are connected, and the monitoring result of the power supply state is If the power from the commercial power supply is being supplied, the following control is performed. That is, control is performed so as to generate converted AC power obtained by converting DC power input from the storage battery into AC power, and to output the converted AC power to the plug. Alternatively, control is performed so as to generate converted DC power obtained by converting AC power from the commercial power source input from the plug into DC power, and to output the converted DC power to the storage battery.

  In addition, when the detection result of the connection state between the plug receptacle and the insertion plug indicates a state where the insertion plug and the plug receptacle are not connected, and the monitoring result of the power supply status indicates that power from the commercial power supply is being supplied. In the case of indicating no state, control is performed so that the connection between the plug and the storage battery is cut off when at least one of them is present.

  The power storage device control method according to the present embodiment also allows the power storage device to be easily installed and used in a home or a general office.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. The power storage device 300 according to the present embodiment includes a power conditioner 201, a battery management unit (BMU) 202, a battery module 203, and an insertion plug 310. The power conditioner 201 includes a control unit 220, an insertion plug voltmeter 230, an ammeter 240, a first switch 250, an AC / DC converter 260, a DC / AC converter 270, and a second switch 280. The power storage device 300 according to this embodiment is different from the power storage device 200 according to the second embodiment in the configuration of the insertion plug 310. Since other configurations are the same, detailed description thereof will be omitted.

  FIG. 4 shows the configuration of the plug plug 310 provided in the power storage device 300 according to the present embodiment. 4A shows a state where the insertion plug 310 is not attached to the plug receiver 22, and FIG. 4B shows a state where the insertion plug 310 is attached to the plug receiver 22. FIG.

  The insertion plug 310 is integrally configured with an insertion / removal detector that detects whether or not the insertion plug 310 is inserted into the plug receiver 22. As shown in FIG. 4, the insertion / removal detector includes an insertion / removal detection switch 311 and a detector 312 and functions as an insertion plug connection detection means. When the insertion plug 310 is inserted into the plug receptacle 22 such as an outlet, the insertion / extraction detection switch 311 is pressed. The detector 312 detects the state of the insertion / extraction detection switch 311 and notifies the control unit 220 of it.

  The control unit 220 controls the first switch 250 and the second switch 280 based on the charging or discharging instruction from the system controller 30 and the detection value from the detector 312. Specifically, when a charging instruction is received from the system controller 30, the control unit 220 performs the following control. That is, the first switch 250 and the second switch are configured so that AC power input from the plug 310 is supplied to the AC / DC converter 260 and DC power converted by the AC / DC converter 260 is supplied to the battery module 203. The switch 280 is switched.

  When a discharge instruction is received from the system controller 30, the control unit 220 performs the following control. First, when the detection value of the detector 312 indicates that the insertion / extraction detection switch 311 is in the pressed state, the control is performed as follows. That is, the DC power output from the battery module 203 is supplied to the DC / AC converter 270, and the AC power converted by the DC / AC converter 270 is output from the plug 310 so that the first switch 250 and the second switch The switch 280 is switched. On the other hand, even when a discharge instruction is received from the system controller 30, when the detection value of the detector 312 indicates that the insertion / removal detection switch 311 is not in the pressed state, the first switch 250. Shut off.

  Since the operation of the other components of the power storage device 300 according to the present embodiment is the same as that of the power storage device 200 according to the second embodiment of the present invention, description thereof will be omitted.

  Next, the operation of the power storage device 300 according to the present embodiment will be described with reference to FIGS.

  First, when the insertion plug 310 is not inserted into the plug receiver 22, the detection value of the detector 312 indicates that the insertion / extraction detection switch 311 is not in the depressed state. Therefore, the control unit 220 determines that the plug plug 310 is not inserted into the plug receiver 22 and shuts off the first switch 250 so that AC power is not output from the plug plug 310.

  Next, a case where the insertion plug 310 is attached to the plug receiver 22 and the control unit 220 receives a charging instruction from the system controller 30 will be described. In this case, the detection value of the detector 312 indicates that the insertion / extraction detection switch 311 is in a pressed state. Therefore, the control unit 220 supplies the AC power input from the plug plug 310 to the AC / DC converter 260, and supplies the DC power converted by the AC / DC converter 260 to the battery module 203. 250 and the second switch 280 are switched. Thereby, it is possible to control the battery module 203 to be charged with the power input from the plug plug 310.

  Next, a case where the plug plug 310 is attached to the plug receiver 22 and the control unit 220 receives a discharge instruction from the system controller 13 will be described. At this time, the detection value of the detector 312 indicates that the insertion / extraction detection switch 311 is in a pressed state. In this case, when the control unit 220 determines that AC power is supplied from the commercial power supply 20 by the same means as in the second embodiment, the following control is performed. That is, the DC power output from the battery module 203 is supplied to the DC / AC converter 270, and the AC power converted by the DC / AC converter 270 is output from the plug 310 so that the first switch 250 and the second switch The switch 280 is switched. Thereby, it can control to output the electric power which the battery module 203 outputs from the insertion plug 310. FIG.

  As described above, the power storage device 300 of the present embodiment is configured such that AC power is not output from the plug plug 310 when the plug plug 310 is not attached to the plug receiver 22. Therefore, since the safety of the power storage device can be improved, the power storage device can be easily installed and used in a home or a general office.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described. FIG. 5 is a block diagram showing a configuration of a power storage system 400 according to the fourth embodiment of the present invention. Power storage system 400 includes power storage device 200, system controller 30, and distribution board 410.

  The power storage device 200 includes a power conditioner 201, a battery management unit (BMU) 202, a battery module 203, and an insertion plug 210. The power conditioner 201 includes a control unit 220, an insertion plug voltmeter 230, an ammeter 240, a first switch 250, an AC / DC converter 260, a DC / AC converter 270, and a second switch 280. The AC / DC converter 260, the DC / AC converter 270, the first switch 250, the second switch 280, and the control unit 220 described above constitute power control means. In addition, since the structure of the electrical storage apparatus 200 was demonstrated in 2nd Embodiment, the description is abbreviate | omitted here.

  FIG. 6 shows a configuration of the distribution board 410. The distribution board 410 is disposed in the electric circuit 21 connected to the commercial power supply 20 and includes a power supply voltmeter 411, a power supply breaker 412, and a power supply ammeter 413.

  The power supply voltmeter 411 detects the voltage of the AC power input to the distribution board 410 and transmits the detected value to the system controller 30. The power breaker 412 cuts off AC power input to the distribution board 410 when the value of the current flowing through the power breaker 412 exceeds a predetermined breaking current value. Further, the control from the system controller 13 switches between a state in which the AC power input to the distribution board 410 is conducted and a state in which it is shut off. The power source ammeter 413 detects the current of the AC power sent from the distribution board 410 and sends the detected value to the system controller 30.

  When the detected value of the power supply ammeter 413 exceeds a predetermined current value, the system controller 30 instructs the control unit 220 to discharge. The predetermined current value at this time is set to a value lower than the cut-off current value of the power breaker 412. If the detected value of the power supply voltmeter 411 does not satisfy the predetermined voltage value or does not satisfy the predetermined frequency, the system controller 30 instructs the control unit 220 to stop discharging. In this case, since it can be determined that power is not supplied from the commercial power source 20, it is for avoiding isolated operation.

  Next, the operation of the power storage system 400 according to the present embodiment will be described with reference to FIGS. 5 and 6.

  When the current value of the AC power sent from the distribution board 410 approaches the cutoff current value of the power circuit breaker 412 and the system controller 30 detects that the detected value of the power supply ammeter 413 exceeds a predetermined current value, The system controller 30 instructs the control unit 220 to discharge. The controller 220 controls the power output from the battery module 203 to be output from the plug 210. That is, the DC power output from the battery module 203 is supplied to the DC / AC converter 270, and the AC power converted by the DC / AC converter 270 is output from the plug 210 so that the first switch 250 and the second switch The switch 280 is switched.

  When AC power is not supplied from the commercial power supply 20, the system controller 30 detects that the detection value of the power supply voltmeter 411 does not satisfy a predetermined voltage value, and instructs the control unit 220 to stop discharging. At this time, since the control unit 220 shuts off the first switch 250, the power discharged from the battery module 203 is not output from the plug 210.

  As described above, in the power storage system 400 according to the present embodiment, when the current value of the AC power sent from the distribution board 410 approaches the interrupt current value of the power breaker 412, the power storage device 200 includes the AC power. Two plugs 210 are configured to output. Therefore, even if the consumption current of the electric device 25 exceeds the interruption current value of the power breaker 412, AC power can be supplied to the electric device 25 using the electric circuit 21 that is an existing wiring. As a result, it is possible to easily relax the restriction on power consumption for the electric device 25, and it is possible to improve the convenience when using the electric device 25.

  In addition, the power storage system 400 of the present embodiment is configured such that AC power is not output from the plug 210 when AC power is not supplied from the commercial power supply 20. Therefore, isolated operation can be avoided, and power from power storage device 200 can be prevented from flowing back into the power system of commercial power supply 20.

  In the above description, when AC power is not supplied from the commercial power source 20, the system controller 30 instructs the control unit 220 to stop discharging. However, the present invention is not limited to this, and the system controller 30 may turn off the power shut-off device 412 of the distribution board 410. In this case, the power from the power storage device 200 does not flow backward to the power system of the commercial power supply 20. Therefore, when the system controller 30 instructs the control unit 220 to discharge, the power storage device 200 can be safely operated alone. Therefore, the power storage device 200 can be used as a backup power source during a power failure.

  In the above description, the system controller 30 instructs the control unit 220 to discharge when the detected value of the power supply ammeter 413 provided in the distribution board 410 exceeds a predetermined current value. However, the present invention is not limited to this, and as illustrated in FIG. 7, when the electrical device 25 includes the communication unit 26, the power storage system 400 can operate as follows. Here, the communication unit 26 has a function of transmitting the current consumption value of the electrical device 25 to the system controller 30, and the system controller 30 has a function of receiving a signal from the communication unit 26.

  When the current consumption of the electrical device 25 exceeds a predetermined current value, the system controller 30 receives an AC power output instruction from the communication unit 26 and instructs the control unit 220 of the power storage device 200 to discharge. The predetermined current value at this time is set to a value lower than the cutoff current value of the distribution board 410.

  At this time, the control unit 220 controls the power output from the battery module 203 to be output from the plug 210. That is, the DC power output from the battery module 203 is supplied to the DC / AC converter 270, and the AC power converted by the DC / AC converter 270 is output from the plug 210 so that the first switch 250 and the second switch The switch 280 is switched.

  Thus, when the current consumption value of the electrical device 25 received from the communication unit 26 exceeds a predetermined value, the system controller 30 can instruct the controller 220 to discharge. In this case as well, it is possible to easily relax the restriction on the power consumption for the electric device 25, and it is possible to improve the convenience when using the electric device 25.

  The power storage device 200 may further include an alarm device. And it can be set as the structure which instruct | indicates that the control part 220 as an electric power control means issues an alarm to an alarm device. When the control unit 220 receives either the charging instruction or the discharging instruction from the system controller 30, the control unit 220 warns when the detection result of the connection state between the plug plug 210 and the plug receiver 22 indicates a disconnected state. The instrument can be instructed to issue an alarm.

  In addition, the power storage system 400 may further include a photovoltaic power generation device (photovoltaics: PV) connected to the distribution board 410. In this case, it is possible to perform a grid-linked operation in which power is supplied in cooperation with the commercial power source 20 using a solar power generation device.

  The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the invention described in the claims, and it is also included within the scope of the present invention. Not too long.

100, 200 Power storage device 110, 210, 310 Insert plug 120 Insert plug connection detection means 130 Commercial power supply monitoring means 140 Storage battery unit 150 Power control means 201 Power conditioner 202 Battery management unit 203 Battery module 220 Control part 230 Plug plug voltage Meter 240 Ammeter 250 First switch 260 AC / DC converter 270 DC / AC converter 271 DC power input 272 DC voltmeter 273 DC ammeter 274 Breaker 275 Inverter 276 AC ammeter 277 AC voltmeter 278 Reactance 279 AC power Output unit 280 Second switch 311 Insertion / extraction detection switch 312 Detector 400 Power storage system 410 Distribution board 411 Power supply voltmeter 412 Power supply breaker 413 Power supply ammeter 10 Linked power supply system 11 Linkage panel 12 Power conditioner 13 Solar cell 14 Charge / discharge unit 15 Storage battery unit 16 Power measurement unit 18 Switching box 19 Connection box 20 Commercial power supply 21 Electrical path 22, 23 Plug receptacle 24 Plug plug 25 Electrical device 26 Communication Unit 30 System controller

Claims (14)

An insertion plug that can be inserted into and removed from a plug holder provided in an electric circuit connected to a commercial power source;
An insertion plug connection detecting means for detecting a connection state between the insertion plug and the plug receptacle;
Commercial power source monitoring means for monitoring a power supply state from the commercial power source,
A storage battery unit equipped with a battery module;
Power control means for controlling charging / discharging of the storage battery unit performed via the plug, based on the detection result of the plug plug connection detection means and the monitoring result of the commercial power supply monitoring means;
The power control means includes
AC / DC conversion means for converting AC power input from the plug into DC power;
DC / AC conversion means for converting DC power input from the storage battery unit into AC power;
A first switching means for switching a connection state between the plug-in plug, the AC / DC conversion means and the DC / AC conversion means;
Second switching means for switching a connection state between the storage battery unit, the AC / DC conversion means and the DC / AC conversion means;
Control means for controlling operations of the first switching means and the second switching means ,
The control means indicates that the detection result indicates a state in which the plug and the plug receiver are connected, and the monitoring result indicates a state in which power from the commercial power source is supplied. If
The first switching means connects the plug and the DC / AC conversion means;
A power storage device that controls the first switching unit and the second switching unit such that the second switching unit connects the storage battery unit and the DC / AC conversion unit . An insertion plug that can be inserted into and removed from a plug holder provided in an electric circuit connected to a commercial power source;
An insertion plug connection detecting means for detecting a connection state between the insertion plug and the plug receptacle;
Commercial power source monitoring means for monitoring a power supply state from the commercial power source,
A storage battery unit equipped with a battery module;
Power control means for controlling charging / discharging of the storage battery unit performed via the plug, based on the detection result of the plug plug connection detection means and the monitoring result of the commercial power supply monitoring means;
The power control means includes
AC / DC conversion means for converting AC power input from the plug into DC power;
DC / AC conversion means for converting DC power input from the storage battery unit into AC power;
A first switching means for switching a connection state between the plug-in plug, the AC / DC conversion means and the DC / AC conversion means;
Second switching means for switching a connection state between the storage battery unit, the AC / DC conversion means and the DC / AC conversion means;
Control means for controlling operations of the first switching means and the second switching means,
The insertion plug connection detecting means includes an insertion plug voltmeter that detects an insertion plug voltage that is a voltage between insertion blades constituting the insertion plug.
A charge reservoir. The control means indicates that the detection result indicates a state in which the plug and the plug receiver are connected, and the monitoring result indicates a state in which power from the commercial power source is supplied. If
The first switching means connects the plug and the DC / AC conversion means;
It said second switching means so as to connect the DC-AC converting means and said battery unit, power storage device described in claim 2 for controlling said first switching means and said second switching means. The control means indicates that the detection result indicates a state in which the plug and the plug receiver are connected, and the monitoring result indicates a state in which power from the commercial power source is supplied. If
The first switching means connects the plug and the AC / DC conversion means;
It said second switching means so as to connect the AC-DC converter means and said battery unit, power storage device described in claim 2 for controlling said first switching means and said second switching means. The control means, when the detection result indicates a state where the plug and the plug receptacle are not connected, and when the monitoring result indicates a state where power from the commercial power source is not supplied, If at least one of them,
The power storage device according to claim 2 , wherein the first switching unit controls the first switching unit so that the plug is not connected to either the AC / DC conversion unit or the DC / AC conversion unit. . The control means, when the detection result indicates a state where the plug and the plug receptacle are not connected, and when the monitoring result indicates a state where power from the commercial power source is not supplied, If at least one of them,
The power storage device according to claim 2 , wherein the operation of the DC / AC conversion unit is stopped. The insertion plug connection detection means includes an insertion / removal detector for detecting whether or not the insertion plug is inserted into the plug receptacle, and the insertion / removal detector is configured integrally with the insertion plug. Item 2. The power storage device according to Item 1 . Before SL commercial power source monitoring means includes an AC ammeter for detecting the converted alternating current is an alternating current the DC-AC converting means outputs the phase change of the phase change and the converted alternating current of the attachment plug voltage The power storage device according to any one of claims 2 to 6 , wherein a result obtained by comparing the two is output as the monitoring result. A power storage device, a system controller, and a distribution board;
The power storage device
An insertion plug that can be inserted into and removed from a plug holder provided in an electric circuit connected to a commercial power source;
An insertion plug connection detecting means for detecting a connection state between the insertion plug and the plug receptacle;
Commercial power source monitoring means for monitoring a power supply state from the commercial power source,
A storage battery unit equipped with a battery module;
Power control means for controlling charging / discharging of the storage battery unit performed through the plug, based on the detection result of the plug plug connection detection means and the monitoring result of the commercial power supply monitoring means,
The distribution board is disposed in the electric circuit connected to the commercial power source, and includes a power supply voltmeter, a power supply breaker, and a power supply ammeter,
The system controller instructs the power control means to charge and discharge based on a detection value of the power supply ammeter ,
The power storage device further includes an alarm device,
When the power control means receives either a charge instruction or a discharge instruction from the system controller, and the detection result indicates that the plug and the plug receiver are not connected, the alarm device Power storage system that instructs the system to issue an alarm . 10. The power storage system according to claim 9, wherein when the detected value of the power supply voltmeter does not satisfy a predetermined voltage value, the system controller places the power supply breaker in a cut-off state and instructs the power control means to discharge. The power storage system according to claim 9 or 10 , further comprising a solar power generation device connected to the distribution board. Monitor the power supply state of the power supplied from the commercial power supply to the power storage device via the plug,
Detecting the connection state between the plug receptacle provided on the electrical path connected to the commercial power source and the plug plug that can be inserted into and removed from the plug receptacle,
Based on the detection result of the connection state and the monitoring result of the power supply state, control charging / discharging of the storage battery included in the power storage device performed through the plug,
When the detection result indicates a state in which the plug and the plug receptacle are connected, and the monitoring result indicates a state in which power from the commercial power source is supplied,
Generates converted AC power by converting DC power input from the storage battery into AC power,
A method for controlling a power storage device that outputs the converted AC power to the plug. When the detection result indicates a state in which the plug and the plug receptacle are connected, and the monitoring result indicates a state in which power from the commercial power source is supplied,
Generates converted DC power by converting AC power from the commercial power source input from the plug into DC power,
The method for controlling a power storage device according to claim 12 , wherein the converted DC power is output to the storage battery. When the detection result indicates a state where the plug and the plug receptacle are not connected, and when the monitoring result indicates a state where power from the commercial power source is not supplied, at least one of If there is
The power storage device control method according to claim 12 , wherein the connection between the plug and the storage battery is cut off.

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