Power supply device

Abstract

To provide a power supply device that can supply power to the outside normally even if there is a problem with a power supply route.SOLUTION: A power supply device 1 includes main circuit breakers 10a, 10b, which receive power from commercial power sources 20a, 20b, multiple AC / DC converters 11a to 11d, each of which is connected to the main circuit breakers 10a, 10b, switching breakers 12a-12h, provided on each of connection paths 15a to 15h between the main circuit breakers 10a, 10b and the AC / DC converters 11a to 11d, for switching ON / OFF of the power supply to each of the AC / DC converters 11a-11d, and an output control unit 13, which controls the supply of the power output from the AC / DC converters 11a to 11d to the outside.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a power supply device. [Background technology]

[0002] 2. Description of the Related Art Conventionally, power supply devices include station-type charging devices for electric vehicles that are installed in the parking lots of shopping centers, restaurants, convenience stores, and the like.

[0003] For example, Patent Document 1 discloses a charging device that controls switching of output destinations so that power is supplied from a plurality of power supply units connected to one power source (commercial power source) via an AC / DC conversion unit to one of a plurality of charging ports. In this way, it is common to provide a plurality of power supply units equipped with a DC / DC converter or the like that converts power from a power source into DC power using an AC / DC conversion unit and then converts the power into a predetermined DC voltage based on the DC power. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2022-037286 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in Patent Document 1, for example, the power supply path from the power source to each power supply unit is limited to one, and if there is any abnormality in the path or in the AC / DC conversion unit, there is a problem that power cannot be supplied to the output destination (charging port) even if all downstream power supply units are normal.

[0006] In particular, in the case of station-type quick charging devices used for electric vehicles, the current used is large, making the above-mentioned path more susceptible to abnormalities, such as welding of relay contacts, than usual. In addition, there is a growing demand for charging devices to maintain the charging function as much as possible, especially in terms of their role as transportation infrastructure for electric vehicles, which are expected to see increasing demand in the future.

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a power supply device that can supply power normally to the outside even if an abnormality occurs in the power supply path. [Means for solving the problem]

[0008] The power supply device of the present invention comprises: A plurality of input units for receiving power from a power source; a plurality of power converters, each of which is connectable to at least two of the plurality of inputs; a plurality of switching units provided in connection paths between the plurality of input units and the plurality of power converters, respectively, for switching ON / OFF of power supply to each of the power converters; an output control unit that controls supply of power output from the plurality of power converters to an outside; The present invention is characterized in that it has the following features.

[0009] According to the above configuration, each power converter can be connected to two or more input units, and the switching unit can select which input unit supplies power to each power converter. As a result, even if an abnormality occurs in a connection path from one input unit or in the switching unit in this connection path, the power converter can receive power from a different input unit via another connection path and the switching unit in that connection path. As a result, the output power from the multiple power converters can be controlled to normally supply power to the outside.

[0010] In the power supply device of the present invention, the plurality of input units may each receive power from a different power source.

[0011] In addition, the power supply device of the present invention may further include a switching control unit that, when power supply from any of the power sources is stopped, controls the switching unit of the connection path connected to the power source from which power supply has been stopped to be turned OFF.

[0012] In the power supply device of the present invention, each of the plurality of power converters may be connectable to all of the plurality of input units.

[0013] The power supply device of the present invention may further include a plurality of output units that supply the power output from the plurality of power converters to an outside.

[0014] In the power supply device of the present invention, the output control section may be capable of switching to which of the plurality of output sections the power output from the plurality of power converters is to be supplied. Effect of the Invention

[0015] According to the present invention, even if an abnormality occurs in the power supply path, power can be normally supplied to the outside. [Brief description of the drawings]

[0016] [Figure 1] 1 is a block diagram of a power supply device 1 according to a first embodiment to which the present invention is applied. [Diagram 2] FIG. 2 is a block diagram of a power supply device 201 according to a second embodiment to which the present invention is applied. [Diagram 3] 3 is a block diagram of an output control unit 213 in the power supply device 201 shown in FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] [First embodiment] A power supply device according to a first embodiment of the present invention will now be described with reference to the accompanying drawings.

[0018] 1, the power supply device 1 according to the first embodiment has a main breaker 10 as a plurality of input units, AC / DC converters 11 as a plurality of power converters, switching breakers 12 as a plurality of switching units, an output control unit 13, a charging port 30, and a switching control unit 40. Note that the power supply device 1 according to the first embodiment is a station-type quick charging device used for electric vehicles, but is not limited thereto.

[0019] (Input: Main breaker 10) Each of the multiple main breakers 10 (main breakers 10a and 10b) is configured to receive power from a power source. Each of the multiple main breakers 10 supplies power to a changeover breaker 12 connected to each main breaker 10. In the first embodiment, breakers are used as the multiple input units, but this is not limited thereto. For example, relay circuits may be used as the multiple input units. In the first embodiment, the power supply device 1 has two main breakers 10, but this is not limited thereto. For example, the power supply device 1 may have three or more input units. In the first embodiment, the power supply device 1 is connected to two commercial power sources 20 (commercial power sources 20a and 20b) as power sources, and each of the commercial power sources 20a and 20b supplies power to the main breaker 10. That is, the multiple main breakers 10 are configured to receive power from different commercial power sources 20. However, this is not limited to the above, and for example, the power supply may be configured to supply power from one commercial power source to multiple input units, or the power supply may be configured to supply power from each of multiple commercial power sources to one or more input units.

[0020] In the first embodiment, the commercial power sources 20a and 20b are separate commercial power sources that receive low voltage power (contract power less than 50 kW) via different low voltage distribution lines, but are not limited to this. In addition, when the power supply device is used as a quick charging device for electric vehicles, the commercial power source 20 may be a high voltage (contract power of 50 kW or more) three-phase AC power source in order to supply large power.

[0021] (Power converter: AC / DC converter 11) Each of the multiple AC / DC converters 11 (AC / DC converters 11a, 11b, 11c, and 11d) is connectable to at least two or more of the multiple main breakers 10. In the first embodiment, the four AC / DC converters 11 are connected to all of the two main breakers 10 and have connection paths 15 (connection paths 15a, 15b, 15c, 15d, 15e, 15f, 15g, and 15h), but are not limited to this. For example, if the power supply device has three or more input units, the multiple power converters may be connectable to at least two of the multiple input units.

[0022] In the first embodiment, an AC / DC converter is used as the power converter, but the present invention is not limited to this. For example, a DC / DC converter may be used as the power converter. In this case, the input unit may receive DC power, or may have an AC / DC converter as the input unit.

[0023] (Switching section: Switching breaker 12) A plurality of switching breakers 12 (switching breakers 12a, 12b, 12c, 12d, 12e, 12f, 12g, 12h) are provided in connection paths 15a to 15h between main breakers 10a and 10b and AC / DC converters 11a to 11d, respectively. The switching breakers 12 switch the power supply to each AC / DC converter 11 between ON and OFF.

[0024] Specifically, switching breakers 12a and 12e are provided on connection path 15a from main breaker 10a to AC / DC converter 11a and connection path 15e from main breaker 10b to AC / DC converter 11a, respectively. By turning one of switching breakers 12a and 12e ON and the other OFF, it becomes possible to select either connection path 15a or connection path 15e to be used as the connection path for supplying power to AC / DC converter 11a.

[0025] In addition, switching breakers 12b and 12f are provided for connection path 15b from main breaker 10a to AC / DC converter 11b, and for connection path 15f from main breaker 10b to AC / DC converter 11b, respectively. By turning one of switching breakers 12b and 12f ON and turning the other OFF, it becomes possible to select either connection path 15b or connection path 15f as the connection path for supplying power to AC / DC converter 11b.

[0026] In addition, switching breakers 12c and 12g are provided for connection path 15c from main breaker 10a to AC / DC converter 11c and connection path 15g from main breaker 10b to AC / DC converter 11c, respectively. By turning one of switching breakers 12c and 12g ON and the other OFF, it becomes possible to select either connection path 15c or connection path 15g as the connection path for supplying power to AC / DC converter 11c.

[0027] In addition, a switching breaker 12d / 12h is provided for a connection path 15d from the main breaker 10a to the AC / DC converter 11d and a connection path 15h from the main breaker 10b to the AC / DC converter 11d, respectively. By turning one of the switching breakers 12d / 12h ON and the other OFF, it is possible to select either the connection path 15d or the connection path 15h for supplying power to the AC / DC converter 11d.

[0028] The switching control unit 40 controls the ON / OFF of the switching breakers 12a to 12h. For example, the switching breakers 12a to 12h are provided with an electromagnetic switching function, and the switching control unit 40 is configured to be able to control the ON / OFF of these switching breakers 12a to 12h. Although not shown, the switching control unit 40 is connected to each of the switching breakers 12a to 12h so as to be able to output a control signal thereto. Furthermore, when the power supply from any of the commercial power sources 20a and 20b is stopped, the switching control unit 40 controls the switching breaker 12 of the connection path 15 connected to the commercial power source 20 from which the power supply has been stopped to be turned OFF. Note that the switching control unit 40 may not be provided and the ON / OFF switching of the switching breakers 12a to 12h may be performed manually.

[0029] The output control unit 13 controls the supply of power output from the AC / DC converters 11a to 11d to the outside. The output control unit 13 is connected to the output of the AC / DC converter 11. The output control unit 13 is configured to control to which of the two charging ports 30 (charging ports 30a and 30b) the output power of the AC / DC converter 11 is to be supplied. In this manner, the output control unit 13 has the charging ports 30 as multiple output units that supply the power output from the multiple AC / DC converters 11 to the outside. For example, although not shown, the output control unit 13 has multiple relay circuits provided on each connection path from the AC / DC converter 11 to the charging ports 30, a relay control board that controls ON / OFF of the multiple relay circuits, and an output control board that determines which relay circuit is to be turned ON / OFF.

[0030] Thus, the power supply device 1 of the first embodiment includes main breakers 10a and 10b which receive power supply from commercial power sources 20a and 20b, a plurality of AC / DC converters 11a to 11d each connected to the main breakers 10a and 10b, switching breakers 12a to 12h which are provided on connection paths 15a to 15h between the main breakers 10a and 10b and the AC / DC converters 11a to 11d respectively and switch ON / OFF the power supply to each of the AC / DC converters 11a to 11d, and an output control unit 13 which controls the supply of power output from the AC / DC converters 11a to 11d to the outside.

[0031] As a result, each of the AC / DC converters 11a-11d can be connected to a plurality of (two in this embodiment) main breakers 10a-10b, and the switching breakers 12a-12h can select which of the main breakers 10a-10b supplies power to each of the AC / DC converters 11a-11d. As a result, even if an abnormality occurs in any of the connection paths 15 connected to the main breakers 10a-10b or in the switching breaker 12 in this connection path 15, the AC / DC converters 11a-11d can receive power from the main breaker 10 via the other connection path 15 and the switching breaker 12 in that connection path 15. As a result, the output power from the plurality of AC / DC converters 11a-11d can be controlled to normally supply power to the outside.

[0032] For example, assume that power is supplied from the main breaker 10a (commercial power source 20a) to the AC / DC converters 11a and 11b, and power is supplied from the main breaker 10b (commercial power source 20b) to the AC / DC converters 11c and 11d. That is, assume that the switching breakers 12a, 12b, 12g, and 12h are ON, and the switching breakers 12c, 12d, 12e, and 12f are OFF. The commercial power source 20 in the first embodiment is a low-voltage receiving power (contracted power is less than 50 kW), and when the upper limit of the supply power based on one commercial power source 20 is less than 50 kW, the AC / DC converters 11a to 11d each supply power of less than 25 kW. For example, when power is supplied from the AC / DC converters 11a to 11d to one charging port 30, high-voltage power exceeding 50 kW (up to nearly 100 kW) can be supplied to one charging target. For example, by supplying nearly 100 kW of power to the battery of an electric vehicle connected to one charging port 30, rapid charging is possible.

[0033] In this state, if some abnormality prevents normal power supply from main breaker 10a (commercial power source 20a), even though AC / DC converters 11a and 11b are not faulty, AC / DC converters 11a and 11b will not be able to supply power to charging port 30. Therefore, by switching switching breakers 12a and 12b to OFF and switching switching breakers 12e and 12f to ON, the power supply from each of AC / DC converters 11a-11d is halved, but it is possible to continue the power supply from AC / DC converters 11a and 11b to charging port 30.

[0034] Also, for example, when any of the AC / DC converters 11a to 11d fails, the switching breaker 12 is switched to supply the power that was supplied to the failed AC / DC converter 11 to the non-failed AC / DC converter 11, so that the normal AC / DC converters 11 can be operated effectively and the power resource can be used effectively. Specifically, when the AC / DC converter 11a fails in the same state as above, the switching breaker 12a is switched OFF, so that the power that was supplied to the AC / DC converter 11a can be supplied to the AC / DC converter 11b. Also, when the AC / DC converters 11a to 11d fail in the same state as above, the switching breakers 12a to 12h are switched OFF, so that the power that was supplied to the AC / DC converters 11a to 11d can be supplied to the AC / DC converters 11b to 11c. Also, by using the breakers, it is possible to easily operate the breakers to turn them ON and OFF, which enables a quick response to a failure.

[0035] [Second embodiment] Next, a power supply device according to a second embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 2, the power supply device 201 according to the second embodiment has a main breaker 10 as a plurality of input units, an AC / DC converter 11 as a plurality of power converters, and a charging port 30, as in the first embodiment. In addition, while the power supply device 1 according to the first embodiment has a switching breaker 12 as a switching unit, the power supply device 201 according to the second embodiment has an input relay circuit 212 (input relay circuits 212a, 212b, 212c, 212d, 212e, 212f, 212g, 212h) as a switching unit. In the second embodiment, the commercial power sources 20 (20a, 20b) are assumed to be different commercial power sources that receive low voltage power via different low voltage distribution lines.

[0036] (Switching unit: input relay circuit 212) A plurality of input relay circuits 212 (input relay circuits 212a, 212b, 212c, 212d, 212e, 212f, 212g, 212h) are provided on connection paths 15a-15h between main breakers 10a and 10b and AC / DC converters 11a-11d, respectively. The plurality of input relay circuits 212 switch ON / OFF of power supply to each AC / DC converter 11. As in the first embodiment, by turning ON one of the two input relay circuits 212 connected to each AC / DC converter 11 and turning OFF the other, it is possible to select the connection path for supplying power to the AC / DC converter 11.

[0037] (Output control unit 213) As shown in FIG. 3, the output control section 213 of the second embodiment has a main control board 2131, an input switching relay board 2133, an output switching relay board 2134, and a plurality of output relay circuits 2135.

[0038] A plurality of output relay circuits 2135 (output relay circuits 2135a, 2135b, 2135c, 2135d, 2135e, 2135f, 2135g, and 2135h) are provided in connection paths 216a to 216h between AC / DC converters 11a to 11d and charging ports 30a and 30b, respectively.

[0039] Specifically, output relay circuits 2135a and 2135b are provided on connection path 216a from AC / DC converter 11a to charging port 30a, and on connection path 216b from AC / DC converter 11a to charging port 30b, respectively. By turning one of these output relay circuits 2135a and 2135b ON and the other OFF, it becomes possible to select whether AC / DC converter 11a will supply power to charging port 30a or charging port 30b.

[0040] Furthermore, output relay circuits 2135c and 2135d are provided on connection path 216c from AC / DC converter 11b to charging port 30a, and connection path 216d from AC / DC converter 11b to charging port 30b, respectively. By turning one of these output relay circuits 2135c and 2135d ON and the other OFF, it becomes possible to select whether AC / DC converter 11b will supply power to charging port 30a or charging port 30b.

[0041] Furthermore, output relay circuits 2135e and 2135f are provided on connection path 216e from AC / DC converter 11c to charging port 30a and connection path 216f from AC / DC converter 11c to charging port 30b, respectively. By turning one of these output relay circuits 2135e and 2135f ON and the other OFF, it becomes possible to select whether AC / DC converter 11c will supply power to charging port 30a or charging port 30b.

[0042] Furthermore, output relay circuits 2135g and 2135h are provided on connection path 216g from AC / DC converter 11d to charging port 30a and connection path 216h from AC / DC converter 11d to charging port 30b, respectively. By turning one of these output relay circuits 2135g and 2135h ON and the other OFF, it becomes possible to select whether AC / DC converter 11d will supply power to charging port 30a or charging port 30b.

[0043] The main control board 2131 determines the ON / OFF state of the input relay circuits 212a-212h and the output relay circuits 2135a-2135h according to the state of the power supply device 201 and the connection state of the object to be charged to the charging ports 30a-30b. The input switching relay board 2133 controls the ON / OFF of the input relay circuits 212a-212h based on a control signal from the main control board 2131. The output switching relay board 2134 controls the ON / OFF of the output relay circuits 2135a-2135h based on a control signal from the main control board 2131. In this way, the output control unit 213 is able to switch to which of the charging ports 30a-30b the power output from the multiple AC / DC converters 11 is to be supplied.

[0044] Thus, the power supply device 201 of the second embodiment includes main breakers 10a and 10b which receive power supply from commercial power sources 20a and 20b, a plurality of AC / DC converters 11a to 11d each connectable to the main breakers 10a and 10b, input relay circuits 212a to 212h which are provided on connection paths 15a to 15h between the main breakers 10a and 10b and the AC / DC converters 11a to 11d respectively and switch ON / OFF the power supply to each of the AC / DC converters 11a to 11d, and an output control unit 213 which controls the supply of power output from the AC / DC converters 11a to 11d to the outside.

[0045] As a result, each of the AC / DC converters 11a-11d can be connected to a plurality of (two in this embodiment) main breakers 10a-10b, and the input relay circuits 212a-212h can select which of the main breakers 10a-10b supplies power to each of the AC / DC converters 11a-11d. As a result, even if an abnormality occurs in any of the connection paths 15 connected to the main breakers 10a-10b or in the input relay circuit 212 in the connection path 15, the AC / DC converters 11a-11d can receive power from the main breaker 10 via the other connection paths 15 and the input relay circuit 212 in the connection path 15. As a result, the output power from the plurality of AC / DC converters 11a-11d can be controlled to normally supply power to the outside.

[0046] For example, assume that power is supplied from the main breaker 10a (commercial power source 20a) to the AC / DC converters 11a and 11b, and power is supplied from the main breaker 10b (commercial power source 20b) to the AC / DC converters 11c and 11d. That is, assume that the input relay circuits 212a, 212b, 212g, and 212h are ON, and the input relay circuits 212c, 212d, 212e, and 212f are OFF. In the second embodiment, the commercial power source 20 is a low-voltage receiving power (contracted power is less than 50 kW), and when the upper limit of the supply power based on one commercial power source 20 is less than 50 kW, the AC / DC converters 11a to 11d each supply power of less than 25 kW.

[0047] In this state, if some abnormality disables normal power supply from main breaker 10a (commercial power source 20a), even though AC / DC converters 11a and 11b are not faulty, AC / DC converters 11a and 11b will not be able to supply power to charging port 30. Therefore, by switching input relay circuits 212a and 212b OFF and input relay circuits 212e and 212f ON, the power supply from each of AC / DC converters 11a-11d is halved, but it is possible to continue the power supply from AC / DC converters 11a and 11b to charging port 30.

[0048] In the above state, if any of the output relay circuits 2135 becomes inoperable due to, for example, a break in wiring, a contact failure, a control line malfunction, welding, or the like, the input relay circuit 212 of the connection path 15 leading to the AC / DC converter 11 connected to the output relay circuit 2135 may be controlled to be turned off. Specifically, if the output relay circuit 2135a becomes inoperable due to a break in wiring, a contact failure, a control line malfunction, welding, or the like, the input relay circuits 212a and 212e provided on the connection paths 15a and 15e leading to the AC / DC converter 11a connected to the output relay circuit 2135a may be controlled to be turned off. In this way, when an abnormality occurs, the AC / DC converters 11 around the abnormal part can be separated from the output route, and when the AC / DC converter 11 is the cause of the abnormality, it becomes possible to prevent further abnormalities from occurring. Furthermore, by disconnecting the AC / DC converter 11a around the abnormal part from the output route, the supplied power decreases, but power can be normally supplied to the outside by the other AC / DC converters 11b, 11c, and 11d which are in a normal state.

[0049] In the above state, if any of the output relay circuits 2135 remains in the OFF state due to, for example, a break in wiring, a contact failure, a malfunction of a control line, or the like, another output relay circuit 2135 provided on another connection path 216 from the AC / DC converter 11 connected to the output relay circuit 2135 that remains in the OFF state may be controlled to be ON. Specifically, if the output relay circuit 2135a remains in the OFF state due to a break in wiring, a contact failure, a malfunction of a connection line, or the like, another output relay circuit 2135b provided on another connection path 216b from the AC / DC converter 11a connected to the output relay circuit 2135a may be controlled to be ON. This makes it possible to continue operating the normal AC / DC converter 11a even if an abnormality such as a break in wiring, a contact failure, or a malfunction of a connection line occurs in the relay circuit and the relay circuit remains in the OFF state.

[0050] In the above state, if any of the input relay circuits 212 remains in the OFF state due to, for example, a disconnection, a contact failure, a connection line failure, or the like, control may be performed to turn on another input relay circuit 212 connected to the AC / DC converter 11 in order to supply power to the AC / DC converter 11 connected to the input relay circuit 212 that remains in the OFF state. Specifically, if the input relay circuit 212a remains in the OFF state due to a disconnection, a contact failure, a connection line failure, or the like, control may be performed to turn on the input relay circuit 212e provided on another connection path 15e connected to the AC / DC converter 11a connected to the input relay circuit 212a. This allows the power supply to the AC / DC converter 11a to be continued.

[0051] In this case, control may be performed such that another input relay circuit 212 connected to the same supply source commercial power source 20 as the input relay circuit 212 that has been turned ON is turned OFF, and another input relay circuit 212 connected to the AC / DC converter 11 to which the OFF input relay circuit 212 is connected is turned ON. For example, in a state in which power is supplied from commercial power source 20a to AC / DC converters 11a and 11b via input relay circuits 212a and 212b and power is supplied from commercial power source 20b to AC / DC converters 11c and 11d via input relay circuits 212g and 212h, if input relay circuit 212a remains in the OFF state due to a malfunction or the like, power is supplied to AC / DC converter 11a via input relay circuit 212e instead of input relay circuit 212a. At this time, the commercial power source 20b supplies power to the AC / DC converters 11a, 11c, and 11d via the input relay circuits 212e, 212g, and 212h. Therefore, when the commercial power sources 20a and 20b receive low voltage power (contracted power is less than 50 kW), sufficient power cannot be supplied to the three AC / DC converters 11a, 11c, and 11d. Therefore, among the three AC / DC converters 11a, 11c, and 11d, power is supplied from the commercial power source 20a, not the commercial power source 20b, to the AC / DC converter 11c. That is, the input relay circuit 212g connected to the commercial power source 20b is turned OFF, and the input relay circuit 212c connected to the commercial power source 20a is turned ON. As a result, even when the commercial power sources 20a and 20b receive low voltage power (contracted power is less than 50 kW), power can be supplied from the commercial power sources 20a and 20b to each of the AC / DC converters 11a to 11d. If commercial power sources 20a, 20b are high voltage receiving power (contract power of 50 kW or more), control may be performed as follows: That is, similarly to the above, when input relay circuit 212a remains in the OFF state and power is supplied to AC / DC converter 11a via input relay circuit 212e instead of input relay circuit 212a, another input relay circuit 212f-212h connected to commercial power source 20b supplying power to input relay circuit 212e is turned OFF, and the other input relay circuit 212b-212d of AC / DC converters 11b-11d connected to this input relay circuit 212f-212h is turned ON.As a result, even if the input relay circuit 212a remains in the OFF state due to a broken wire, a poor contact, etc., it is possible to continue charging at full power without reducing the charging output via the AC / DC converter 11a by switching the input.

[0052] In addition, in the above state, if any of the input relay circuits 212 becomes disabled due to, for example, a disconnection, a contact failure, a control line malfunction, welding, or the like, the main breaker 10 connected to the input relay circuit 212 may be controlled to be turned off. Specifically, if the input relay circuit 212a becomes disabled due to a disconnection, a contact failure, a control line malfunction, welding, or the like, the main breaker 10a connected to the input relay circuit 212a may be controlled to be turned off. In this way, when an abnormality occurs, the AC / DC converter 11a connected to the input relay circuit 212a can be separated from the output route. That is, when the input relay circuit 212a becomes disabled due to the AC / DC converter 11a, it is possible to prevent further abnormality from occurring. In addition, by separating the AC / DC converter 11a around the abnormal part from the output route, the supply power decreases, but the other AC / DC converters 11b, 11c, and 11d in the normal state can normally supply power to the outside.

[0053] The above describes the preferred first and second embodiments of the present invention. However, the present invention is not limited to the above-described first and second embodiments, and various modifications are possible within the scope of the claims. [Explanation of symbols]

[0054] 1 Power supply device 10 Main breaker 11 AC / DC converter 12 Changeover breaker 13 Output control section 15 Connection Path 20 Commercial power supply 30 charging port 40 Switching control section 201 Power supply equipment 212 Input relay circuit 213 Output control section 216 Connection Path 2131 Main control board 2133 Input switching relay board 2134 Output switching relay board 2135 Output relay circuit

Claims

1. A plurality of input units for receiving power from a power source; a plurality of power converters, each of which is connectable to at least two or more of the plurality of inputs; a plurality of switching units provided in connection paths between the plurality of input units and the plurality of power converters, respectively, for switching ON / OFF of power supply to each of the power converters; an output control unit that controls supply of power output from the plurality of power converters to an outside; A power supply device comprising:

2. 2. The power supply device according to claim 1, wherein the plurality of input units receive power from different power sources.

3. 3. The power supply device according to claim 2, further comprising a switching control unit that, when power supply from any of the power sources is stopped, controls the switching unit of the connection path connected to the power source from which power supply has been stopped to be turned OFF.

4. 2. The power supply device according to claim 1, wherein each of the plurality of power converters is connectable to all of the plurality of input units.

5. 2. The power supply device according to claim 1, further comprising a plurality of output units for supplying the electric power outputted from the plurality of power converters to an external device.

6. 6. The power supply device according to claim 5, wherein the output control section is capable of switching to which of the plurality of output sections the power output from the plurality of power converters is to be supplied.

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