Power supply device, power supply device control method, program, and storage medium

Abstract

A power source device (10) and a control method therefor execute control in which, when an interrupter (24) switches from a blocked state to a connected state, a first state amount, which correlates to the frequency of A / C voltage output to the interrupter (24), from each of a first converter (18) and a second converter (20) match each other, and a second state amount correlating to the phase of the A / C voltage therefrom match each other.

Description

[Technical Field]

[0001] The present invention relates to a power supply device, a control method for a power supply device, a program, and a storage medium. [Background technology]

[0002] International Publication No. 2021 / 049622 discloses a power supply device that can accommodate multiple power storage units. The power supply device can charge the multiple power storage units with power supplied from an external power source. The power supply device can also supply power from the multiple power storage units to an external operating unit. Summary of the Invention

[0003] When the power supply device cannot supply power from the multiple power storage units to the operating unit, it outputs power supplied from the power source to the operating unit. Also, when the power supply device cannot output power supplied from the power source to the operating unit, it outputs power from the multiple power storage units to the operating unit. In this way, when switching the power supply source for the operating unit, there is a possibility that the power supplied to the operating unit will fluctuate before and after the switch.

[0004] The present invention aims to solve the above-mentioned problems.

[0005] A first aspect of the present invention is a power supply device including a power storage unit, an external connection unit connected to an external operating unit, and an interrupter unit arranged on a power transmission path between the power storage unit and the external connection unit, wherein the power storage unit has a first power storage unit and a second power storage unit arranged in parallel with each other, and the power supply device includes a first power conversion unit arranged between the first power storage unit and the interrupter unit on the power transmission path, a second power conversion unit arranged between the second power storage unit and the interrupter unit on the power transmission path, and a control unit for controlling the first power conversion unit and the second power conversion unit. and a control unit, wherein the first power conversion unit converts DC power supplied from the first power storage unit into AC power, and the second power conversion unit converts DC power supplied from the second power storage unit into AC power, and the control unit controls the first power conversion unit and the second power conversion unit when the interrupter switches from a disconnected state to a connected state, so as to match a first state quantity correlated with the frequency of the AC voltages output from the first power conversion unit and the second power conversion unit, and to match a second state quantity correlated with the phase of the AC voltages.

[0006] A second aspect of the present invention is a control method for a power supply device including a power storage unit, an external connection unit connected to an external operating unit, and an interrupter unit arranged on a power transmission path between the power storage unit and the external connection unit, wherein the power storage unit has a first power storage unit and a second power storage unit arranged in parallel with each other, and the power supply device includes a first power conversion unit arranged between the first power storage unit and the interrupter unit on the power transmission path, and a second power conversion unit arranged between the second power storage unit and the interrupter unit on the power transmission path, and the first power conversion unit converts DC power supplied from the first power storage unit into AC power, and the second power conversion unit converts DC power supplied from the first power storage unit into AC power. The conversion unit converts DC power supplied from the second power storage unit into AC power, and the control method includes a first step of determining or obtaining switching of the interrupter unit from a disconnected state to a connected state, a second step of controlling to match a first state quantity correlated with the frequency of the AC voltage output from each of the first power conversion unit and the second power conversion unit, and to match a second state quantity correlated with the phase of the AC voltage, a third step of switching the interrupter unit from the disconnected state to the connected state, and a fourth step of starting supply of the AC power from each of the first power conversion unit and the second power conversion unit to the operating unit.

[0007] A third aspect of the present invention is a program for causing a computer to execute the power supply device control method of the second aspect.

[0008] A fourth aspect of the present invention is a storage medium that stores the program of the third aspect.

[0009] According to the present invention, when switching the source of power supply to the operating unit, it is possible to suppress fluctuations in the power supplied to the operating unit before and after the switching. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a configuration diagram of a power supply device according to a first embodiment. [Figure 2] FIG. 2 is a diagram showing the internal configuration of the first power supply device of FIG. [Figure 3]FIG. 3 is a diagram showing the internal configuration of the second power supply device of FIG. [Figure 4] FIG. 4 is a flowchart showing the operation of the first embodiment. [Figure 5] FIG. 5 is a timing chart showing an example of synchronous control. [Figure 6] FIG. 6 is a configuration diagram of a power supply device according to the second embodiment. [Figure 7] FIG. 7 is a diagram showing the internal configuration of the power supply device of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] 1 is a configuration diagram of a power supply device 10 according to a first embodiment. In the following description, the power supply device 10 will be referred to as a first power supply device 10.

[0012] The first power supply device 10 is a stationary power supply device installed in a house 12 or the like. As shown in Fig. 2, the first power supply device 10 includes a first power storage unit 14, a second power storage unit 16, a first conversion unit 18, a second conversion unit 20, an ECU 22 (Electronic Control Unit), three interrupters 24, 26, 28, three external connection units 30, 32, 34, two communication units 36, 38, a voltage sensor 40 (first power acquisition unit), and a current sensor 42 (first power acquisition unit).

[0013] The first power storage unit 14 and the second power storage unit 16 are DC power sources. The first power storage unit 14 and the second power storage unit 16 are detachable from the first power supply device 10. That is, the first power storage unit 14 and the second power storage unit 16 are mobile batteries detachable from the first power supply device 10. The first power storage unit 14 and the second power storage unit 16 are preferably, for example, battery packs of detachable lithium-ion batteries. Furthermore, it is more preferable that the first power storage unit 14 and the second power storage unit 16 are detachable from the first power supply device 10 without using a separate work tool or the like. That is, the first power storage unit 14 and the second power storage unit 16 are configured to be freely detachable from the first power supply device 10 without using a work tool or the like. At least one of the first power storage unit 14 and the second power storage unit 16 may be fixed to the first power supply device 10. In addition, "attaching to or detaching from the first power supply device 10" includes the case where the first power storage unit 14 and the second power storage unit 16 are attached to the first power supply device 10, and the case where the first power storage unit 14 and the second power storage unit 16 are detached from the first power supply device 10.

[0014] The external connection unit 32 (second external connection unit) is an AC inlet. The external connection unit 32 is electrically connected to a distribution board 48 of the house 12 (see FIG. 1 ) via two wires 44, 46. The distribution board 48 is electrically connected to an external AC system 58 (AC power source), which is a commercial power source, via four wires 50, 52, 54, 56. Of the four wires 50, 52, 54, 56, two wires 50, 54 are high-potential wires. Of the four wires 50, 52, 54, 56, one wire 52 is a neutral wire. Of the four wires 50, 52, 54, 56, the remaining wire 56 is a ground wire. Therefore, the AC system 58 supplies three-phase AC power (AC voltage) to the distribution board 48 via the four wires 50, 52, 54, 56. In this embodiment, the AC system 58 may supply AC power other than three-phase power to the distribution board 48. The AC system 58 may supply single-phase AC power to the distribution board 48, for example.

[0015] One wire 44 extending from the external connection part 32 is a positive wire. One wire 44 is electrically connected to a high-potential wire 50. The other wire 46 extending from the external connection part 32 is a negative wire. The other wire 46 is electrically connected to a neutral wire 52. Therefore, the distribution board 48 supplies one-phase AC power (input power, external AC power) to the first power supply device 10 via the two wires 44, 46.

[0016] The external connection unit 30 (first external connection unit, third external connection unit) is an AC outlet. The external connection unit 30 is electrically connected to another distribution board 64 in the house 12 via two wires 60, 62. The other distribution board 64 is electrically connected to a home appliance 66 (operating unit) that is a load. The first power supply device 10 can supply AC power (output power) to the home appliance 66 via the two wires 60, 62 and the distribution board 64. The home appliance 66 is a power operating unit that operates by the supply of AC power.

[0017] The ECU 22 (first to tenth control units, first power acquisition unit, second power acquisition unit) is a computer that comprehensively controls each unit of the first power supply device 10. The ECU 22 realizes various functions by reading and executing programs stored in a memory 68 (storage medium).

[0018] The first power storage unit 14 and the second power storage unit 16 are electrically connected to the external connection unit 32 via a connection path 70 (second connection path). The first power storage unit 14 and the second power storage unit 16 are electrically connected to the external connection unit 30 via a power transmission path 72. The two external connection units 30, 32 are electrically connected to each other via a connection path 74 (first connection path).

[0019] Specifically, first power storage unit 14 is electrically connected to the input side of first conversion unit 18 via two wirings 76, 78. The output side of first conversion unit 18 is electrically connected to external connection unit 32 via two wirings 80, 82. Interruption unit 28 (fourth interruption unit) is arranged in two wirings 80, 82. The output side of first conversion unit 18 is electrically connected to external connection unit 30 via two other wirings 84, 86. Interruption unit 24 (first interruption unit, third interruption unit) is arranged in the other two wirings 84, 86.

[0020] The first conversion unit 18 includes a DC / DC converter 88, an inverter 90, a voltage sensor 92 (second power acquisition unit), and a current sensor 94 (second power acquisition unit).

[0021] DC / DC converter 88 converts the DC voltage of first power storage unit 14 into a DC voltage of a desired value, based on a control signal from ECU 22. Inverter 90 converts the DC voltage converted by DC / DC converter 88 into an AC voltage, based on a control signal from ECU 22. Alternatively, inverter 90 converts an AC voltage (external AC voltage) supplied from external connection unit 32 into a DC voltage, based on a control signal from ECU 22. The AC voltage supplied from external connection unit 32 is the AC voltage supplied from distribution board 48 to first power supply device 10. Therefore, first conversion unit 18 converts DC power supplied from first power storage unit 14 into AC power, or converts AC power supplied from distribution board 48 into DC power.

[0022] The voltage sensor 92 sequentially detects the AC voltage on the output side of the first conversion unit 18 (the output side of the inverter 90) and outputs the detection result to the ECU 22. The current sensor 94 sequentially detects the AC current flowing on the output side of the first conversion unit 18 and outputs the detection result to the ECU 22.

[0023] The second power storage unit 16 is electrically connected to the input side of the second conversion unit 20 via two wirings 96, 98. Two wirings 100, 102 extend from the output side of the second conversion unit 20. The two wirings 100, 102 are electrically connected to two wirings 80, 82 extending from the output side of the first conversion unit 18. The two wirings 100, 102 are electrically connected to the two wirings 80, 82 at locations between the first conversion unit 18 and the interruption unit 28. Therefore, the first power storage unit 14 and the second power storage unit 16 are arranged in parallel with each other with respect to the interruption unit 28.

[0024] Two other wirings 104, 106 extend from the output side of the second conversion unit 20. The other two wirings 104, 106 are electrically connected to the other two wirings 84, 86 extending from the output side of the first conversion unit 18. The other two wirings 104, 106 are electrically connected to the other two wirings 84, 86 at locations between the first conversion unit 18 and the interruption unit 24. Therefore, the first power storage unit 14 and the second power storage unit 16 are arranged in parallel with each other with respect to the interruption unit 24.

[0025] Similar to the first conversion unit 18, the second conversion unit 20 includes a DC / DC converter 108, an inverter 110, a voltage sensor 112 (second power acquisition unit), and a current sensor 114 (second power acquisition unit).

[0026] DC / DC converter 108 converts the DC voltage of second power storage unit 16 into a DC voltage of a desired value, based on a control signal from ECU 22. Inverter 110 converts the converted DC voltage into an AC voltage, or converts the AC voltage into a DC voltage, based on a control signal from ECU 22. Therefore, second conversion unit 20 converts DC power supplied from second power storage unit 16 into AC power, or converts AC power supplied from distribution board 48 into DC power.

[0027] The voltage sensor 112 sequentially detects the AC voltage on the output side of the second conversion unit 20 (the output side of the inverter 110) and outputs the detection result to the ECU 22. The current sensor 114 sequentially detects the AC current flowing on the output side of the second conversion unit 20 and outputs the detection result to the ECU 22.

[0028] The two wirings 80, 82 electrically connected to the external connection portion 32 and the two wirings 84, 86 electrically connected to the external connection portion 30 are electrically connected via two other wirings 116, 118. The other two wirings 116, 118 electrically connect the location between the interruption portion 28 in the two wirings 80, 82 and the external connection portion 32 and the location between the interruption portion 24 in the two wirings 84, 86 and the external connection portion 30. An interruption portion 26 (second interruption portion) is arranged in the two wirings 116, 118.

[0029] Therefore, the connection path 70 is formed by a plurality of wirings 76, 78, 80, 82, 96, 98, 100, 102 between the first and second power storage units 14, 16 and the external connection unit 32. In this case, the first power storage unit 14 and the first conversion unit 18 are arranged in series on the connection path 70. The second power storage unit 16 and the second conversion unit 20 are also arranged in series on the connection path 70. Note that "arranged in series" means that they are arranged in order on the connection path 70.

[0030] Power transmission path 72 is formed by a plurality of wires 76, 78, 84, 86, 96, 98, 104, and 106 between first power storage unit 14 and second power storage unit 16 and external connection unit 30. In this case, first power storage unit 14 and first conversion unit 18 are arranged in series on power transmission path 72. Second power storage unit 16 and second conversion unit 20 are also arranged in series on power transmission path 72. Note that "arranged in series" means that they are arranged in order on power transmission path 72.

[0031] The connection path 74 is formed by a plurality of wires 116, 118 between the two external connection parts 30, 32.

[0032] The three interrupters 24, 26, 28 are switching units such as semiconductor switches, relays, or contactors. The three interrupters 24, 26, 28 are switched between a connected state and a disconnected state based on a control signal from the ECU 22. The connected state is an on state in which the interrupters 24, 26, 28 are on and both ends of the interrupters 24, 26, 28 are electrically connected. The disconnected state is an off state in which the interrupters 24, 26, 28 are off and both ends of the interrupters 24, 26, 28 are electrically disconnected.

[0033] A current sensor 42 is disposed in the positive line wiring 80 at a location between the discontinuous portion 28 and the external connection portion 32. The current sensor 42 sequentially detects the AC current flowing from the distribution board 48 to the first power supply device 10, and outputs the detection result to the ECU 22.

[0034] A voltage sensor 40 is disposed in the two wires 80, 82 between the discontinuous portion 28 and the external connection portion 32. The voltage sensor 40 sequentially detects the AC voltage supplied from the distribution board 48 to the first power supply device 10, and outputs the detection result to the ECU 22.

[0035] The ECU 22 calculates the AC power to be supplied from the distribution board 48 to the first power supply device 10 based on the AC voltage detected by the voltage sensor 40 and the AC current detected by the current sensor 42. The ECU 22 calculates the AC power to be output from the first conversion unit 18 or the AC power to be input to the first conversion unit 18 based on the AC voltage detected by the voltage sensor 92 and the AC current detected by the current sensor 94. The ECU 22 calculates the AC power to be output from the second conversion unit 20 or the AC power to be input to the second conversion unit 20 based on the AC voltage detected by the voltage sensor 112 and the AC current detected by the current sensor 114. Each AC power calculated by the ECU 22 may be apparent power or active power.

[0036] The external connection unit 34 (fourth external connection unit) is electrically connected to the two wirings 84, 86 between the first conversion unit 18 and the intermittent unit 24 via two wirings 120, 122. Specifically, the two wirings 120, 122 are connected to the two wirings 84, 86 at a location between the connection point with the other two wirings 104, 106 extending from the second conversion unit 20 and the intermittent unit 24.

[0037] The communication unit 36 ​​transmits and receives signals or information to and from a second power supply device 130 (another power supply device) via a communication line 124 such as a CAN (Controller Area Network) under the control of the ECU 22. The other communication unit 38 transmits and receives signals or information between an integrated power supply manager 132 of the house 12 and the second power supply device 130 by wireless communication under the control of the ECU 22. The integrated power supply manager 132 controls the amount of power supplied to the house 12 from the AC grid 58 by managing the amount of power generated by a power generation device (not shown) installed in the house 12 and the amount of power stored (electricity) in the first power storage unit 14 and the second power storage unit 16.

[0038] As shown in FIG. 3, the second power supply device 130 has the same configuration as the first power supply device 10 (see FIG. 2). That is, the second power supply device 130 is a stationary power supply device installed in a house 12 (see FIG. 1) or the like. The second power supply device 130 includes a third power storage unit 134 (another power storage unit), a fourth power storage unit 136 (another power storage unit), a third conversion unit 138, a fourth conversion unit 140, an ECU 142 (another control unit), three interrupters 144, 146, and 148, three external connection units 150, 152, and 154, two communication units 156 and 158, a voltage sensor 160, and a current sensor 162. The third conversion unit 138 and the fourth conversion unit 140 each include a DC / DC converter 164, an inverter 166, a voltage sensor 168, and a current sensor 170. The ECU 142 includes a memory 172. Therefore, detailed description of the internal configuration of the second power supply device 130 will be omitted.

[0039] The external connection unit 152 of the second power supply device 130 and the distribution board 48 are electrically connected via two wires 174, 176. The external connection unit 154 of the second power supply device 130 and the external connection unit 34 of the first power supply device 10 are electrically connected via two wires 178, 180. The communication unit 156 is capable of transmitting and receiving signals or information to and from the communication unit 36 ​​of the first power supply device 10 via the communication line 124. The communication unit 158 ​​is capable of transmitting and receiving signals or information between the communication unit 38 of the first power supply device 10 and the integrated power manager 132 via wireless communication.

[0040] In the first embodiment, the second power supply device 130 only needs to include at least the third power storage unit 134, the fourth power storage unit 136, the third conversion unit 138, the fourth conversion unit 140, and the ECU 142.

[0041] The operation of first power supply device 10 configured as above will be described with reference to Figures 4 and 5. In this explanation of operation, Figures 1 to 3 will also be referred to as necessary. Here, a case will be described in which, when AC power supplied from distribution board 48 to first power supply device 10 is being supplied to home appliance 66, power supply is switched from first power storage unit 14 and second power storage unit 16 to home appliance 66 by controlling interrupters 24, 26, and 28.

[0042] First, in step S1 of Fig. 4, the AC system 58 (see Fig. 1) supplies three-phase AC power to the distribution board 48. The distribution board 48 supplies one phase of AC power to the first power supply device 10. The ECU 22 (see Fig. 2) of the first power supply device 10 sets one interrupter 26 to a connected state (on state) and sets the two interrupters 24, 28 to a disconnected state (off state). As a result, the AC power input to the external connection unit 32 is supplied to the home appliance 66 via the connection path 74, the external connection unit 30, and another distribution board 64. That is, a pass-through is started in which the AC power supplied from the distribution board 48 is supplied directly to the home appliance 66.

[0043] In this case, each of the three voltage sensors 40, 92, 112 sequentially detects AC voltage and outputs the detection results to the ECU 22. Each of the three current sensors 42, 94, 114 sequentially detects AC current and outputs the detection results to the ECU 22. The ECU 22 sequentially calculates the AC power input from the distribution board 48 to the external connection unit 30 based on the detection results of the voltage sensor 40 and the current sensor 42. The ECU 22 also sequentially calculates the AC power on the output side of the first conversion unit 18 and the second conversion unit 20 based on the detection results of the voltage sensors 92, 112 and the current sensors 94, 114.

[0044] As described above, since the two interrupters 24, 28 are in the disconnected state, charging of the first storage unit 14 and the second storage unit 16, or output of power from the first storage unit 14 and the second storage unit 16 is not performed.

[0045] In the next step S2, ECU 22 determines whether to switch from pass-through to power supply to home appliance 66 by first power storage unit 14 and second power storage unit 16. If it is determined to switch power supply (step S2: YES), ECU 22 proceeds to the process of step S3.

[0046] Specifically, ECU 22 determines to switch to power supply to home appliance 66 from first power storage unit 14 and second power storage unit 16 in the following cases (1) to (3), for example. Note that the following cases (1) and (2) are events that ECU 22 can predict. Furthermore, the following case (3) is an unexpected event that ECU 22 cannot predict.

[0047] (1) A time period in which the electricity rate for AC power supplied from AC system 58 is high occurs. In this case, ECU 22 determines to switch to power supply from first power storage unit 14 and second power storage unit 16 in order to reduce the electricity rate. Regarding the electricity rate, the rate plan of the electric power company with which house 12 has a contract may be stored in advance in memory 68. This allows ECU 22 to refer to the rate plan and ascertain the time period in which the electricity rate is high.

[0048] (2) This is a case where it is acquired that the AC power supplied from the distribution board 48 has become smaller than the AC power supplied to the home appliances 66. Alternatively, this is a case where it is acquired that the AC power supplied from the distribution board 48 has become smaller than the AC power supplied to the home appliances 66. More specifically, this is a case where it is acquired that the requested value of AC power requested by the home appliances 66 becomes larger than the AC power supplied from the distribution board 48 due to load fluctuations or the like. This requested value is transmitted from the integrated power supply manager 132 to the communication unit 38 of the first power supply device 10 via wireless communication. The ECU 22 sequentially calculates the AC power to be supplied from the distribution board 48 to the first power supply device 10. The ECU 22 compares the calculated AC power with the requested value and determines whether the requested value is larger than the AC power. When it is determined (acquired) that the requested value is larger than the calculated AC power, the ECU 22 decides to switch to power supply from the first power storage unit 14 and the second power storage unit 16 in order to resolve the shortage of power supplied to the home appliances 66.

[0049] (3) The supply of AC power from distribution board 48 to first power supply device 10 is stopped due to instability, a power outage, a broken wire, or the like in AC system 58. In this case, the value of the AC voltage detected by voltage sensor 40 and the value of the AC current detected by current sensor 42 become substantially at the zero level. Therefore, ECU 22 determines to switch to power supply from first power storage unit 14 and second power storage unit 16 in order to avoid an interruption in the power supply to home appliance 66.

[0050] In step S3, the ECU 22 controls the first conversion unit 18 and the second conversion unit 20 to perform a synchronization process that synchronizes the AC voltage output from the inverter 90, the AC voltage output from the inverter 110, and the AC voltage supplied from the distribution board 48 to the first power supply device 10.

[0051] Specifically, the synchronization process controls so that a first state quantity correlated with the frequencies of the two AC voltages output from each inverter 90, 110 matches. The synchronization process also controls so that a second state quantity correlated with the phases of the two AC voltages output from each inverter 90, 110 matches. The synchronization process also controls so that a third state quantity correlated with the amplitudes of the two AC voltages output from each inverter 90, 110 matches. The synchronization process also controls so that a fourth state quantity correlated with the frequency of the AC voltage supplied from the distribution board 48 to the first power supply device 10 matches the first state quantity. The synchronization process also controls so that a fifth state quantity correlated with the phase of the AC voltage supplied from the distribution board 48 to the first power supply device 10 matches the second state quantity.

[0052] The first state quantity is a physical quantity related to the frequencies of the two AC voltages output from each inverter 90, 110. Specifically, the first state quantity is the period or wavelength of the two AC voltages. The frequencies of the two AC voltages may be the first state quantity. The second state quantity is a physical quantity related to the phases of the two AC voltages. The phases of the two AC voltages may be the second state quantity. The third state quantity is a physical quantity related to the amplitudes of the two AC voltages. Specifically, the third state quantity is the magnitude of the voltages at a predetermined phase of the two AC voltages. The amplitudes of the two AC voltages may be the third state quantity.

[0053] The fourth state quantity is a physical quantity related to the frequency of the AC voltage supplied from the distribution board 48 to the first power supply device 10. Specifically, the fourth state quantity is the period or wavelength of the AC voltage. The frequency of the AC voltage may be the fourth state quantity. The fifth state quantity is a physical quantity related to the phase of the AC voltage supplied from the distribution board 48 to the first power supply device 10. The phase of the AC voltage may be the fifth state quantity.

[0054] In step S3, the two interrupters 24, 28 are in the disconnected state, which makes it possible to prevent the two AC voltages output from the inverters 90, 110 from being erroneously supplied to the home appliance 66 during the synchronization process.

[0055] Furthermore, in step S3, the ECU 22 may adjust the amplitudes of the two AC voltages output from the inverters 90, 110 in accordance with the requested values ​​from the home appliances 66. This allows the inverters 90, 110 to supply AC power to the home appliances 66 in accordance with the requested values ​​in step S6, which will be described later.

[0056] Furthermore, in step S5, which will be described later, the interrupters 24, 26 are switched between the disconnected state and the connected state in a relatively short time. Therefore, in events such as (1) and (2) above, even if the phases of the two AC voltages output from the inverters 90, 110 are out of phase with the AC voltage supplied from the distribution board 48 to the first power supply device 10, the home appliance 66 may not recognize the fluctuation in AC voltage before and after the switching. In this case, in step S3, the ECU 22 only needs to synchronize at least the AC voltage output from the inverter 90 and the AC voltage output from the inverter 110.

[0057] In step S4, the ECU 22 determines whether the synchronization process is complete. As described above, the detection results of the voltage sensors 40, 92, and 112 are sequentially input to the ECU 22. Therefore, the ECU 22 determines whether the AC voltages are synchronized based on the detection results of the voltage sensors 40, 92, and 112.

[0058] If the AC voltages are not synchronized (step S4: NO), the ECU 22 continues the synchronization process of step S3. If the AC voltages are synchronized (step S4: YES), the ECU 22 proceeds to step S5.

[0059] In step S5, the ECU 22 first switches the interrupter 26 from the connected state to the disconnected state, thereby ending the pass-through and stopping the supply of AC power from the distribution board 48 to the home appliances 66. Next, the ECU 22 switches the interrupter 24 from the disconnected state to the connected state.

[0060] As a result, in step S6, the supply of AC power from the first conversion unit 18 and the second conversion unit 20 to the home appliance 66 begins. The ECU 22 electrically controls the switching of the two interrupters 24, 26, so that the power supply source for the home appliance 66 can be switched in a short time. Furthermore, AC power can be supplied to the home appliance 66 without overlapping the AC power from the distribution board 48 and the AC power from the first conversion unit 18 and the second conversion unit 20. As a result, fluctuations in AC power (AC voltage) before and after the switching can be suppressed. That is, the home appliance 66, which is a load, can recognize that AC power is being continuously supplied from a single power source. Furthermore, because the interrupter 24 is switched to the connected state after the interrupter 26 is switched to the disconnected state, the occurrence of reverse power flow from the first power supply device 10 to the AC grid 58 can be avoided. This eliminates the need for a mechanism for monitoring reverse power flow, allowing the first power supply device 10 to be configured at low cost.

[0061] In this way, the ECU 22 predicts the occurrence of the above events (1) and (2) and performs synchronization processing in step S3. This makes it possible to suppress fluctuations in the AC power supplied to the home appliance 66 even when the required value of the home appliance 66, which is a load, fluctuates or when the amplitude or frequency of the AC voltage supplied to the home appliance 66 fluctuates.

[0062] In addition, in the case of the above event (3), in step S6, the ECU 22 supplies AC power from the first conversion unit 18 and the second conversion unit 20 to the home appliance 66 all at once. This allows the home appliance 66 to quickly recover from the power outage state.

[0063] In the flowchart of FIG. 4, changes can be made as indicated by the dashed lines. In this operation, in step S1, two interconnection units 26, 28 (see FIG. 2) are switched from a disconnected state to a connected state. As a result, AC power supplied from distribution board 48 (see FIG. 1) is output to home appliance 66 and first conversion unit 18 and second conversion unit 20. Each inverter 90, 110 converts AC power to DC power. Each DC / DC converter 88, 108 converts DC voltage to a DC voltage of a desired value. As a result, first power storage unit 14 and second power storage unit 16 are charged. In other words, first power supply device 10 supplies AC power supplied from distribution board 48 to home appliance 66 by pass-through, while using a portion of the AC power to charge first power storage unit 14 and second power storage unit 16.

[0064] If the determination result in step S2 is affirmative (step S2: YES), ECU 22 proceeds to step S7. In step S7, ECU 22 switches interceptor 28 from the connected state to the disconnected state. This stops the output of AC power from distribution board 48 to first conversion unit 18 and second conversion unit 20, and the charging process of first power storage unit 14 and second power storage unit 16 ends. Thereafter, ECU 22 executes the synchronization process in step S3. In this way, the synchronization process is executed after the charging process ends. As a result, the synchronization process can be performed reliably.

[0065] In the first embodiment, by detaching one of the first power storage unit 14 and the second power storage unit 16, it is also possible to supply power to a device other than the home appliance 66. Examples of such a device include a vehicle such as a motorcycle, and a general-purpose device such as a lawnmower.

[0066] In this case, ECU 22 may acquire consumption schedule information or detachment schedule information in advance, and calculate the amount of power (supplyable power) that can be supplied from first power storage unit 14 and second power storage unit 16 to home appliance 66 based on the acquired information. Consumption schedule information is information indicating that power from the power storage units will be consumed by devices other than home appliance 66. detachment schedule information is information indicating that first power storage unit 14 or second power storage unit 16 may be detached from first power supply device 10.

[0067] This makes it possible to prevent the power storage unit to be removed from outputting power to the home appliance 66. Note that the ECU 22 can prevent the power storage unit to be removed from outputting power to the home appliance 66 by stopping the operation of the conversion unit connected to the power storage unit to be removed.

[0068] Furthermore, in the first embodiment, the first power supply device 10 and the second power supply device 130 (see FIG. 3) are electrically connected via wiring 178, 180. Furthermore, the first power supply device 10 and the second power supply device 130 can transmit and receive signals or information via the communication units 36, 38, 156, 158. Therefore, in the first embodiment, in step S3, the AC voltages output from the first conversion unit 18, the second conversion unit 20, the third conversion unit 138, and the fourth conversion unit 140 may be synchronized. As a result, in step S6, AC power can be supplied from the first conversion unit 18, the second conversion unit 20, the third conversion unit 138, and the fourth conversion unit 140 to the home appliance 66.

[0069] Furthermore, in the first embodiment, in the synchronization process of step S3, the ECU 22 may synchronize the AC voltages output from the first conversion unit 18 and the second conversion unit 20 at zero crossings. That is, the ECU 22 controls the first conversion unit 18 and the second conversion unit 20 so that one AC voltage is output from the point in time of the zero crossing of the other AC voltage.

[0070] Furthermore, in the synchronization process of step S3, each ECU 22, 142 may synchronize, at zero crossings, the AC voltages output from the first conversion unit 18, the second conversion unit 20, the third conversion unit 138, and the fourth conversion unit 140. In this case, each ECU 22, 142 may control the first conversion unit 18, the second conversion unit 20, the third conversion unit 138, and the fourth conversion unit 140 so that the remaining three AC voltages are output from the time point of the zero crossing of one AC voltage.

[0071] Alternatively, as shown in FIG. 5, when AC voltages are output in the order of the first conversion unit 18 (see FIG. 2), the second conversion unit 20, the third conversion unit 138 (see FIG. 3), and the fourth conversion unit 140, the AC voltages can be output sequentially at intervals of one cycle, starting from the zero-cross point of the AC voltage that was previously output. In FIG. 5, the cycle of each AC voltage is T and the amplitude is Vm. In this case, an AC voltage is output from the first conversion unit 18 at time t0. Furthermore, an AC voltage is output from the second conversion unit 20 at time t1, which is the cycle T after time t0. Time t1 is also the zero-cross point of the AC voltage output from the first conversion unit 18. Furthermore, an AC voltage is output from the third conversion unit 138 at time t2, which is the cycle T after time t1. Time t2 is also the zero-cross point of the AC voltage output from the second conversion unit 20. Furthermore, at time t3, which is the period T after time t2, an AC voltage is output from the fourth conversion unit 140. Time t3 is also the zero-cross time of the AC voltage output from the third conversion unit 138. By outputting AC voltages in sequence in this way, it becomes possible to appropriately deal with any problems that may occur in the supply of AC power to the home appliance 66 (see FIG. 1).

[0072] When AC voltages are output from the first conversion unit 18, the second conversion unit 20, the third conversion unit 138, and the fourth conversion unit 140, the AC voltages may be output simultaneously from the same point in time. This allows the home appliance 66 to quickly recover from a power outage.

[0073] Furthermore, in the first embodiment, the first power supply device 10 may supply both the AC power supplied from the distribution board 48 and the AC power supplied from the first conversion unit 18 and the second conversion unit 20 to the home appliance 66. This makes it possible to make up for a shortage of power supply due to pass-through with power supply from the first power storage unit 14 and the second power storage unit 16.

[0074] In the first embodiment, the ECU 22 may obtain an estimated value of the AC power based on the detection results of the voltage sensors 40, 92, 112 and the current sensors 42, 94, 114. This allows the ECU 22 to perform the processes of steps S2 to S4 using the estimated value of the AC power.

[0075] In the first embodiment, the ECU 22 may determine in step S4 that the synchronization process is completed when it is predicted (estimated) that the state quantities to be determined will soon match, thereby enabling the ECU 22 to execute the process of step S5 at a stage when it is estimated that the state quantities to be determined will match.

[0076] A power supply device 200 according to the second embodiment will be described with reference to FIGS. 6 and 7. The power supply device 200 according to the second embodiment differs from the power supply device 10 according to the first embodiment (first power supply device 10 (see FIG. 1)) in that the second power supply device 130 is not connected. Therefore, the power supply device 200 according to the second embodiment has the same configuration as the first power supply device 10. The power supply device 200 according to the second embodiment can also operate in the same manner as the first power supply device 10. Therefore, the power supply device 200 according to the second embodiment can also obtain the same effects as the first power supply device 10.

[0077] In the first and second embodiments, when first power storage unit 14 or second power storage unit 16 is detached from power supply device 10, 200, it is used as a power source for various vehicles such as unicycles, two-wheeled vehicles, three-wheeled vehicles, and four-wheeled vehicles. Examples of vehicles include electric vehicles and vehicles equipped with a drive motor such as hybrid vehicles.

[0078] Furthermore, the first power storage unit 14 or the second power storage unit 16 can be used as a power source for various mobile bodies. The various mobile bodies include mobile bodies that can accommodate people and mobile bodies that cannot accommodate people. Examples of such mobile bodies include aircraft, flying objects, ships, and the like, in addition to vehicles.

[0079] Furthermore, first power storage unit 14 or second power storage unit 16 can be used as a power source for the following general-purpose devices. Specifically, the various general-purpose devices include (1) various dischargers, (2) various types of work machines such as general-purpose implements, lawnmowers, tillers, and blowers, etc., (3) electric devices without motors such as floodlights and lighting equipment, and (4) various types of equipment installed in houses and buildings.

[0080] (1) to (4) may be general-purpose equipment that does not require a human operator. (2) may be a work machine that does not require a human operator. Alternatively, (2) may be a work machine that requires a human operator. Furthermore, examples of (4) above include (A) equipment that operates on DC power, such as clocks and audio equipment such as radio cassette recorders, and (B) equipment that operates on AC power, such as fans, juicers, mixers, or incandescent lamps. Another example of (4) above includes (C) equipment that operates on DC power converted from AC power, such as televisions, radios, stereos, or personal computers. Another example of (4) above includes (D) inverter-type equipment, including washing machines, refrigerators, air conditioners, microwave ovens, and fluorescent lamps. The above (D) equipment is equipment that operates on AC power that is first converted from AC power to DC power and then further converted from the DC power.

[0081] Furthermore, in the above description, the power supply devices 10 and 200 have been described as including the first power storage unit 14 and the second power storage unit 16. The power supply devices 10 and 200 may also include three or more power storage units.

[0082] The power supply devices 10 and 200 can be applied to various power supply systems that supply power from multiple power storage units to a load or the like, or that charge multiple power storage units. The power supply devices 10 and 200 can be installed not only in the home 12, but also in various business establishments, public facilities, etc.

[0083] The power supply devices 10 and 200 can also be applied to the power supply systems of various mobile objects, such as the mobile objects described above. The power supply device 10 can also be applied to the power supply systems of the various general-purpose devices described above.

[0084] Furthermore, in the above description, the operating unit is the home appliance 66, but the operating unit may be another power consuming device that operates on AC power.

[0085] The above description has been given of a case where the ECU 22 determines to switch the intermittent unit 24 from the disconnected state to the connected state. In the present embodiment, the ECU 22 may acquire the determination of the switch from the disconnected state to the connected state, and switch the intermittent unit 24 from the disconnected state to the connected state in accordance with the acquired determination.

[0086] The invention that can be understood from the above-described embodiments will be described below.

[0087] A first aspect of the present invention is a power supply device (10, 200) comprising a power storage unit (14, 16), an external connection unit (30) connected to an external operating unit (66), and an interrupter (24) arranged on a power transmission path (72) between the power storage unit and the external connection unit, wherein the power storage unit has a first power storage unit (14) and a second power storage unit (16) arranged in parallel with each other, and the power supply device comprises a first power conversion unit (18, 90) arranged between the first power storage unit and the interrupter in the power transmission path, a second power conversion unit (20, 110) arranged between the second power storage unit and the interrupter in the power transmission path, and and a control unit (22) that controls the first power conversion unit and the second power conversion unit, wherein the first power conversion unit converts DC power supplied from the first power storage unit into AC power, and the second power conversion unit converts DC power supplied from the second power storage unit into AC power, and when the intermittent unit switches from a disconnected state to a connected state, the control unit controls the first power conversion unit and the second power conversion unit so that a first state quantity that correlates with the frequency of the AC voltage output from each of the first power conversion unit and the second power conversion unit matches, and so that a second state quantity that correlates with the phase of the AC voltage matches.

[0088] According to the present invention, when switching the source of power supply to the operating unit, it is possible to suppress fluctuations in the power supplied to the operating unit before and after the switching.

[0089] In a first aspect of the present invention, when the disconnecting unit is switched from a disconnected state to a connected state, the control unit controls the first power conversion unit and the second power conversion unit so as to match a third state quantity correlated with the amplitude of the AC voltage output from each of the first power conversion unit and the second power conversion unit.

[0090] This makes it possible to further suppress fluctuations in the power supplied to the operating unit before and after switching the power supply source for the operating unit.

[0091] In a first aspect of the present invention, the power supply device includes a first control unit (22) that is the control unit, and a second control unit (22) that controls the interrupter, and the second control unit switches the interrupter from a disconnected state to a connected state when the first control unit acquires that the first state quantities of the AC voltages output from the first power conversion unit and the second power conversion unit have matched and that the second state quantities of the AC voltages have matched.

[0092] As a result, the phase of the waveform of the AC voltage before switching matches the phase of the waveform of the AC voltage after switching, so that fluctuations in the AC voltage before and after switching can be reliably and efficiently suppressed.

[0093] In a first aspect of the present invention, the power supply device includes a first external connection part (30) that is the external connection part, a second external connection part (32) that is connected to an external AC power source (58), and a connection path (74) that connects the first external connection part and the second external connection part.

[0094] This allows the power supply device to receive AC power from the AC power source and the first electric power Conversion unit and second electric power Either the AC power from the converter or the AC power from the converter can be supplied to the operating section.

[0095] In a first aspect of the present invention, the power supply device includes a third control unit (22) that is the control unit, a first connecting / disconnecting unit (24) that is the connecting / disconnecting unit, a second connecting / disconnecting unit (26) that is arranged in the connection path, and a fourth control unit (22) that controls the second connecting / disconnecting unit, and when the first connecting / disconnecting unit is in a disconnected state and the second connecting / disconnecting unit is in a connected state, the fourth control unit switches the second connecting / disconnecting unit from a connected state to a disconnected state before the first connecting / disconnecting unit switches from a disconnected state to a connected state.

[0096] This prevents the occurrence of a time period in which the power transmission path and the connection path are connected, thereby reliably preventing the occurrence of reverse power flow from the first and second power storage units to the AC power source.

[0097] In a first aspect of the present invention, when the disconnecting unit switches from a disconnected state to a connected state while an external AC voltage is being supplied from the AC power source to the connection path, the control unit controls the first power conversion unit and the second power conversion unit so that a fourth state quantity correlated with a frequency of the external AC voltage matches the first state quantity and a fifth state quantity correlated with a phase of the external AC voltage matches the second state quantity.

[0098] As a result, the phase of the external AC voltage before switching and the phase of the AC voltage after switching match, so that fluctuations in the AC voltage before and after switching can be further suppressed.

[0099] In a first aspect of the present invention, the power supply device comprises a fifth control unit (22) which is the control unit, a sixth control unit (22) which controls the interrupter unit, and a first power acquisition unit (22, 40, 42) which acquires output power supplied to the operating unit via the first external connection unit and input power supplied to the connection path from the AC power source via the second external connection unit, and the sixth control unit controls the interrupter unit based on the output power and the input power acquired by the first power acquisition unit.

[0100] This allows the disconnecting portion to be switched from the disconnected state to the connected state with high precision.

[0101] In a first aspect of the present invention, when the sixth control unit acquires that the input power has become smaller than the output power or that the input power will become smaller than the output power while the intermittent unit is in an interrupted state, the sixth control unit switches the intermittent unit from an interrupted state to a connected state.

[0102] This makes it possible to prevent the output power supplied to the operating unit from becoming insufficient, thereby further suppressing fluctuations in AC power before and after switching.

[0103] In a first aspect of the present invention, the power supply device includes a second connection path (70) that connects the second external connection part and the power storage part when the connection path is a first connection path (74).

[0104] This allows the power storage unit to be charged while AC power is being supplied to the operating unit.

[0105] In a first aspect of the present invention, the power supply device includes a seventh control unit (22) that is the control unit, a third interrupter (24) that is the interrupter, a fourth interrupter (28) that is arranged in the second connection path, and an eighth control unit (22) that controls the fourth interrupter, and the eighth control unit switches the fourth interrupter from a connected state to a disconnected state before the seventh control unit controls the first state quantities of the AC voltages output from the first power conversion unit and the second power conversion unit to match each other and to match the second state quantities of the AC voltages.

[0106] Since it is not possible to perform the process of making the first state quantity and the second state quantity equal while charging the power storage unit, by switching the fourth interrupter to the interrupted state before performing the process of making the first state quantity and the second state quantity equal, it is possible to reliably make the first state quantity and the second state quantity equal to each other.

[0107] In a first aspect of the present invention, the power supply device includes a ninth control unit (22) which is the control unit, a tenth control unit (22) which controls the interrupter, and a second power acquisition unit (22, 92, 94, 112, 114) which acquires available power which can be supplied from the first storage unit and the second storage unit to the external connection unit, and the tenth control unit controls the interrupter based on the available power.

[0108] This makes it possible to avoid a shortage of power supplied to the operating section.

[0109] In a first aspect of the present invention, the second power acquisition unit acquires the available power based on planned consumption information indicating that the power of the first storage unit or the second storage unit will be consumed for purposes other than supplying to the external connection unit.

[0110] This prevents the storage unit, which supplies power to devices other than the operating unit, from outputting power to the operating unit. As a result, power can be supplied to the device. Also, a shortage of power supplied to the operating unit can be avoided.

[0111] In a first aspect of the present invention, the first power storage unit and the second power storage unit are detachable from the power supply device.

[0112] This allows the first power storage unit or the second power storage unit to be used as a power source for supplying power to devices other than the operating unit.

[0113] In a first aspect of the present invention, the second power acquisition unit acquires the available power based on planned detachment information indicating that the first storage unit or the second storage unit may be detached from the power supply device.

[0114] This prevents the storage unit, which supplies power to devices other than the operating unit, from outputting power to the operating unit. As a result, power can be supplied to the device. Also, a shortage of power supplied to the operating unit can be avoided.

[0115] In a first aspect of the present invention, the power supply device includes a third external connection part (30) which is the external connection part, and a fourth external connection part (34) which is connected to another external power supply device (130).

[0116] This makes it possible to supply AC power from another power supply device to the operating section.

[0117] In a first aspect of the present invention, the power supply device includes a communication unit (36, 38) capable of communicating with the other power supply device, and the other power supply device includes another power storage unit (134, 136), another power conversion unit (138, 140, 166) that converts DC power output from the other power storage unit into AC power, and another control unit (142) that controls the other power conversion unit and is capable of communicating with the communication unit.

[0118] This allows AC power to be reliably supplied to the operating section from the other power supply device.

[0119] In a first aspect of the present invention, the fourth external connection part is connected between the first power conversion part and the second power conversion part and the interrupter part in the power transmission path, and is connected to the other power conversion part.

[0120] This allows AC power supplied from another power supply device to be reliably supplied to the operating section via the power supply device of the present invention.

[0121] A second aspect of the present invention is a control method for a power supply device including a power storage unit, an external connection unit connected to an external operating unit, and an interrupter unit arranged on a power transmission path between the power storage unit and the external connection unit, wherein the power storage unit has a first power storage unit and a second power storage unit arranged in parallel with each other, and the power supply device includes a first power conversion unit arranged between the first power storage unit and the interrupter unit on the power transmission path, and a second power conversion unit arranged between the second power storage unit and the interrupter unit on the power transmission path, and the first power conversion unit converts DC power supplied from the first power storage unit into AC power, and the second power conversion unit converts DC power supplied from the first power storage unit into AC power. The conversion unit converts DC power supplied from the second power storage unit into AC power, and the control method includes a first step of determining or obtaining switching of the interrupter unit from a disconnected state to a connected state, a second step of controlling to match a first state quantity correlated with the frequency of the AC voltage output from each of the first power conversion unit and the second power conversion unit, and to match a second state quantity correlated with the phase of the AC voltage, a third step of switching the interrupter unit from the disconnected state to the connected state, and a fourth step of starting supply of the AC power from each of the first power conversion unit and the second power conversion unit to the operating unit.

[0122] In the present invention, when the power supply source for the operating unit is switched, it is possible to suppress fluctuations in the power supplied to the operating unit before and after the switch.

[0123] A third aspect of the present invention is a program for causing a computer (22) to execute the power supply device control method of the second aspect.

[0124] In the present invention, when the power supply source for the operating unit is switched, it is possible to suppress fluctuations in the power supplied to the operating unit before and after the switch.

[0125] A fourth aspect of the present invention is a storage medium (68) that stores the program of the third aspect.

[0126] In the present invention, when the power supply source for the operating unit is switched, it is possible to suppress fluctuations in the power supplied to the operating unit before and after the switch.

[0127] The present invention is not limited to the above disclosure, and various configurations can be adopted without departing from the gist of the present invention.

Claims

1. A power supply device (10, 200) comprising: a power storage unit (14, 16); an external connection unit (30) connected to an external operating unit (66); and an interrupter (24) disposed on a power transmission path (72) between the power storage unit and the external connection unit, The power storage unit has a first power storage unit (14) and a second power storage unit (16) arranged in parallel with each other, The power supply device includes a first power conversion unit (18, 90) disposed between the first power storage unit and the interruption unit in the power transmission path, a second power conversion unit (20, 110) disposed between the second power storage unit and the interruption unit in the power transmission path, and a control unit (22) that controls the first power conversion unit and the second power conversion unit. a first external connection part (30) which is the external connection part; a second external connection portion (32) connected to an external AC power source (58); a connection path (74) connecting the first external connection portion and the second external connection portion; Equipped with the first power conversion unit converts DC power supplied from the first power storage unit into AC power; the second power conversion unit converts DC power supplied from the second power storage unit into AC power; the control unit controls the first power conversion unit and the second power conversion unit when the connecting / disconnecting unit switches from a disconnected state to a connected state, thereby controlling so that a first state quantity correlated with the frequency of an AC voltage output from each of the first power conversion unit and the second power conversion unit matches, and so that a second state quantity correlated with the phase of the AC voltage matches.

2. 2. The power supply device according to claim 1, the control unit controls the first power conversion unit and the second power conversion unit when the disconnection unit is switched from a disconnected state to a connected state, thereby controlling a third state quantity correlated with the amplitude of the AC voltage output from each of the first power conversion unit and the second power conversion unit to be consistent.

3. 2. The power supply device according to claim 1, The control unit includes a first control unit (22) that is the control unit, and a second control unit (22) that controls the interrupter unit, the second control unit switches the interrupter from a disconnected state to a connected state when the first control unit acquires that the first state quantities of the AC voltages output from the first power conversion unit and the second power conversion unit are matched and that the second state quantities of the AC voltages are matched.

4. The power supply device according to any one of claims 1 to 3, The control device includes a third control unit (22) that is the control unit, a first interrupting unit (24) that is the interrupting unit, a second interrupting unit (26) that is arranged in the connection path, and a fourth control unit (22) that controls the second interrupting unit, When the first interlocking unit is in a disconnected state and the second interlocking unit is in a connected state, the fourth control unit switches the second interlocking unit from a connected state to a disconnected state before the first interlocking unit switches from a disconnected state to a connected state.

5. The power supply device according to any one of claims 1 to 3, the control unit controls the first power conversion unit and the second power conversion unit when the disconnecting unit switches from a disconnected state to a connected state while an external AC voltage is being supplied from the AC power source to the connection path, thereby controlling so that a fourth state quantity correlated with a frequency of the external AC voltage matches the first state quantity, and so that a fifth state quantity correlated with a phase of the external AC voltage matches the second state quantity.

6. The power supply device according to any one of claims 1 to 3, the power supply device includes a fifth control unit (22) that is the control unit, a sixth control unit (22) that controls the interrupter, and a first power acquisition unit (22, 40, 42) that acquires output power supplied to the operating unit via the first external connection unit and input power supplied to the connection path from the AC power source via the second external connection unit, The sixth control unit controls the interrupter based on the output power and the input power acquired by the first power acquisition unit.

7. 7. The power supply device according to claim 6, The sixth control unit switches the interrupter unit from the interrupted state to the connected state when, while the interrupter unit is in the interrupted state, it acquires that the input power has become smaller than the output power or that the input power will become smaller than the output power.

8. The power supply device according to any one of claims 1 to 3, The power supply device comprises a second connection path (70) that connects the second external connection portion and the power storage portion when the connection path is a first connection path (74).

9. 9. The power supply device according to claim 8, The device includes a seventh control unit (22) that is the control unit, a third interrupting unit (24) that is the interrupting unit, a fourth interrupting unit (28) that is arranged in the second connection path, and an eighth control unit (22) that controls the fourth interrupting unit, the eighth control unit switches the fourth interconductor from a connected state to a disconnected state before the seventh control unit controls the first state quantities of the AC voltages output from the first power conversion unit and the second power conversion unit to be identical and to be identical to each other.

10. The power supply device according to any one of claims 1 to 3, a ninth control unit (22) that is the control unit, a tenth control unit (22) that controls the interrupter, and a second power acquisition unit (22, 92, 94, 112, 114) that acquires supplyable power that is power that can be supplied to the external connection unit from the first power storage unit and the second power storage unit, The tenth control unit controls the interrupting unit based on the available power supply.

11. 11. The power supply device according to claim 10, A power supply device, wherein the second power acquisition unit acquires the available power based on planned consumption information indicating that the power of the first storage unit or the second storage unit will be consumed for purposes other than supplying to the external connection unit.

12. 11. The power supply device according to claim 10, The power supply device, wherein the first power storage unit and the second power storage unit are detachable from the power supply device.

13. 13. The power supply device according to claim 12, The second power acquisition unit acquires the available power based on planned detachment information indicating that the first power storage unit or the second power storage unit may be detached from the power supply device.

14. The power supply device according to any one of claims 1 to 3, The power supply device comprises a third external connection part (30) which is the external connection part, and a fourth external connection part (34) which is connected to another external power supply device (130).

15. 15. The power supply device of claim 14, a communication unit (36, 38) capable of communicating with the other power supply device; The other power supply device includes another power storage unit (134, 136), another power conversion unit (138, 140, 166) that converts DC power output from the other power storage unit into AC power, and another control unit (142) that controls the other power conversion unit and is capable of communicating with the communication unit.

16. 16. The power supply device of claim 15, A power supply device, wherein the fourth external connection unit is connected between the first power conversion unit and the second power conversion unit and the interrupter in the power transmission path, and is connected to the other power conversion unit.

17. A control method for a power supply device including a power storage unit, an external connection unit connected to an external operating unit, and an interrupter unit disposed on a power transmission path between the power storage unit and the external connection unit, the power storage unit includes a first power storage unit and a second power storage unit arranged in parallel with each other, the power supply device includes a first power conversion unit arranged between the first power storage unit and the interruption unit in the power transmission path, a second power conversion unit arranged between the second power storage unit and the interruption unit in the power transmission path, a first external connection unit that is the external connection unit, a second external connection unit that is connected to an external AC power source, and a connection path that connects the first external connection unit and the second external connection unit, the first power conversion unit converts DC power supplied from the first power storage unit into AC power; the second power conversion unit converts DC power supplied from the second power storage unit into AC power; The control method includes: a first step of determining or obtaining a switchover of said interrupting unit from a disconnected state to a connected state; a second step of controlling so that a first state quantity correlated with the frequency of an AC voltage output from each of the first power conversion unit and the second power conversion unit coincides with each other and so that a second state quantity correlated with the phase of the AC voltage coincides with each other; a third step of switching the interrupter from a disconnected state to a connected state; a fourth step of starting supply of the AC power from each of the first power conversion unit and the second power conversion unit to the operation unit; A control method for a power supply device, comprising:

18. A program that causes a computer (22) to execute the power supply device control method according to claim 17.

19. A storage medium (68) storing the program according to claim 18.

Images