Power supply system

Abstract

Provided is a power supply system which enables efficient power supply.　This power supply system comprises: a power generation unit having a first power generation device; a fixed power storage unit having a first fixed power storage device that stores power obtained by the first power generation device; and a movable power storage unit that stores power obtained by the first power generation device and power from the first fixed power storage device. The movable power storage unit has an input terminal and an output terminal connected to an external electric apparatus, or has a combination terminal that is used as the input terminal and as the output terminal. The movable power storage unit has a wheel for a movable power storage device. The movable power storage unit has a conversion unit that has an AC / DC converter for use in at least charging and / or a DC / AC inverter for use in at least discharging. Power is supplied to the movable power storage unit through: the input terminal; and a terminal that is provided to a housing where the fixed power storage unit is housed and that is electrically connected to the first fixed power storage device.

Description

Power Supply System

[0001] The present invention relates to a power supply system and the like.

[0002] 2. Description of the Related Art Conventionally, as disclosed in Patent Document 1, a charging / discharging device for an electric vehicle has been proposed that stores electric power and supplies the stored power to an electric vehicle or the like.

[0003] JP 2015-208132 A

[0004] However, the storage battery was fixed to the housing of the electric vehicle or the like.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a power supply system capable of supplying power efficiently.

[0006] The power supply system according to the present invention includes a power generation unit having a first power generation device, a fixed power storage unit having a first fixed power storage device that stores power generated by the first power generation device, and a movable power storage unit that stores power generated by the first power generation device and power from the first fixed power storage device. The movable power storage unit has an input terminal and an output terminal that connects to an external electrical device, or a dual-purpose terminal that is used as both the input terminal and the output terminal. The movable power storage unit has wheels for the movable power storage device. The movable power storage unit has a conversion unit that includes at least one of an AC / DC converter used at least during charging and a DC / AC inverter used at least during discharging. Power is supplied to the movable power storage unit via the input terminal and a terminal that is provided in a housing that houses the fixed power storage unit and is electrically connected to the first fixed power storage device.

[0007] The movable power storage unit can be charged by supplying power via an input terminal or the like. The movable power storage unit can also be moved on a surface. This allows the movable power storage unit to be moved independently to the vicinity of an electrical device located away from the housing and supply power to the electrical device. In other words, charging / discharging can be performed efficiently using the movable power storage unit. The AC / DC converter allows the power obtained by the power generation unit to be efficiently supplied to the movable power storage unit. The DC / AC inverter allows the power stored in the movable power storage unit to be efficiently supplied to external electrical devices.

[0008] Preferably, the first power generation device includes a light-receiving panel that is a solar panel that receives sunlight, an angle adjustment unit that adjusts the angle of the light-receiving surface of the light-receiving panel, and a height adjustment unit that adjusts the height of the light-receiving panel. When in use, the light-receiving panel is held in a high position, and when not in use, the light-receiving panel is held in a low position.

[0009] This makes it possible to efficiently generate solar power and prevent damage to the solar power generation device (first DC power generation device 11) due to strong winds.

[0010] More preferably, the power generating unit includes a wind power generating device, and the height adjusting unit adjusts the height of the wind power generating device.

[0011] This makes it possible to efficiently generate wind power and prevent damage to the wind power generation device (first AC power generation device 13) due to strong winds.

[0012] More preferably, the first power generating device includes a plurality of light receiving panels and a connection portion that connects the plurality of light receiving panels, each of the plurality of light receiving panels having a light receiving surface on both a front surface and a back surface.

[0013] The angle of the light receiving panel can be changed in conjunction with the extension and contraction of the height adjustment part, which simplifies the structure of the angle adjustment part.

[0014] In addition, preferably, the housing is a housing of a vehicle. The housing is provided with a plurality of the terminals and is capable of accommodating a plurality of the movable power storage units. On / off control of power supply to the movable power storage units connected via the terminals and the input terminal is performed based on a charge state.

[0015] Preferably, the housing is fixed to the ground or a building. At least power is supplied from the fixed power storage unit to an external electric device.

[0016] More preferably, power is supplied from the movable power storage unit to the external electrical device via the terminal and the output terminal.

[0017] Preferably, the housing is a housing for an electric vehicle, and the electric vehicle is a funeral vehicle including a funeral hall in which an altar and a coffin are arranged, or a medical vehicle including medical examination equipment.

[0018] It is easy to prevent incorrect wiring of the charging input terminal and the discharging output terminal.

[0019] Preferably, the input terminal and the output terminal are separate from each other, and the input terminal is provided at a higher position than the output terminal.

[0020] This makes it easier to increase the storage space inside the housing.

[0021] More preferably, the housing is a housing of an electric vehicle. The electric vehicle has a tailgate lifting device. A stopper is provided in an area of ​​the tailgate lifting device that comes into contact with a wheel for the movable power storage device to hold the movable power storage unit in a state where the movable power storage unit cannot move horizontally. The tailgate lifting device holds the movable power storage unit such that the input terminal is connected to the terminal when the movable power storage unit is lifted and stored in the housing.

[0022] The movable power storage unit can be easily moved to a predetermined position inside the housing using a tailgate lifting device provided in the electric vehicle. By arranging terminals and the like at a high position inside the housing, it is possible to make more effective use of the space inside the housing than in a configuration in which the terminals and the like are arranged at a medium height inside the housing.

[0023] Preferably, a carriage separate from the housing is provided, and the movable power storage unit is placed on the carriage. When the movable power storage unit is placed on the carriage, the input terminal and the terminal are positioned at the same height.

[0024] With the movable power storage unit held by the dolly, it becomes possible to move the movable power storage unit to a position away from the housing.

[0025] Preferably, a dolly separate from the housing is provided. The dolly holds the movable power storage unit so that the input terminal is connected to the terminal when the dolly is stored in the housing. Of the wheels of the dolly, the wheel facing the housing is a retractable wheel. Before the dolly is stored in the housing, the retractable wheel functions as the front wheel of the dolly. When the dolly is stored in the housing, the retractable wheel is folded.

[0026] With the movable power storage unit held by the cart, it can be moved to a position away from the housing. Also, by folding the retractable wheels, it can be easily moved into the housing.

[0027] Preferably, the movable power storage unit has the dual-purpose terminal, and the dual-purpose terminal is configured with a positive connector and a negative connector that are separate members.

[0028] More preferably, at least a part of an electric wire connecting the power storage device of the movable power storage unit and the dual-purpose terminal is made of an elastic material. The dual-purpose terminal is movably attached to a case of the movable power storage unit.

[0029] It can be easily connected to the terminals of external electrical equipment.

[0030] Preferably, the movable power storage unit includes a plurality of power storage devices, the input terminal and the plurality of power storage devices are connected in parallel, and the output terminal and the plurality of power storage devices are connected in parallel.

[0031] More preferably, the movable power storage unit includes a control device and a switch, and the control device controls the switch so that the plurality of power storage devices are charged at different times.

[0032] This makes it easier to prevent backflow and short circuits during charging, which are caused by differences in the charging rate of each storage device.

[0033] Preferably, the movable power storage unit includes a holder for detachably holding each of the plurality of power storage devices.

[0034] By removing it, it is possible to easily replace the storage device alone.

[0035] Preferably, the movable power storage unit includes at least one of an information transmitting unit that transmits information relating to the charging rates of at least the plurality of power storage devices, and a display device that displays information relating to the charging rates of at least the plurality of power storage devices.

[0036] It becomes possible to know the status of the movable power storage unit 50 using an external device or the like.

[0037] Preferably, the movable power storage unit includes a plurality of power storage devices and a switching unit. The input terminal and the plurality of power storage devices are connected in series. The output terminal and the plurality of power storage devices are connected in parallel. The switching unit switches between electrical connections between the input terminal and the plurality of power storage devices and electrical connections between the output terminal and the plurality of power storage devices.

[0038] This makes it easier to prevent backflow and short circuits during charging, which are caused by differences in the charging rate of each storage device.

[0039] Preferably, the fixed power storage unit includes the first fixed power storage device, a second power storage device, and a third power storage device. The first fixed power storage device stores power from at least the first power generation device of the power generation unit that is disposed away from the housing. The second fixed power storage device stores power from the second power generation device of the power generation unit that is attached to the housing or disposed away from the housing. The third fixed power storage device is used to drive a motor of the electric vehicle. The power stored in the first fixed power storage device is stored in the third fixed power storage device via a rapid charger, a rapid charging cable, and a rapid charging terminal electrically connected to the third fixed power storage device. The power stored in the second fixed power storage device is stored in the third fixed power storage device via a normal charger, a normal charging cable, and a normal charging input terminal electrically connected to the third fixed power storage device.

[0040] Electric power from a power generation device with large output and few installation space limitations, such as outside the housing, is stored in a first fixed power storage device with large storage battery capacity. Electric power from a power generation device with small output and many installation space limitations, such as on the top surface of the housing, is stored in a second fixed power storage device with small storage battery capacity. This makes it possible to efficiently charge by selectively using two fixed power storage devices with different storage battery capacities depending on the difference in output.

[0041] Electric power is temporarily stored in the first fixed power storage device and the second fixed power storage device. Therefore, without complicating the control of power supply from the third fixed power storage device to the motor, electric power can be immediately supplied from the first fixed power storage device to the third fixed power storage device via a fast charging cable. Also, without complicating the control of power supply from the third fixed power storage device to the motor, electric power can be immediately supplied from the second fixed power storage device to the third fixed power storage device via a normal charging cable. This makes it possible to use the first fixed power storage device, etc., as a battery (backup power source) for the third fixed power storage device.

[0042] The first fixed power storage device and the third fixed power storage device are electrically connected via the quick-charge cable and the quick-charge input terminal. Therefore, unless the quick-charge cable is connected to the quick-charge input terminal, power is not accidentally supplied from the first fixed power storage device to the third fixed power storage device. This reduces the possibility of damage to the third fixed power storage device, which is fixed to the housing and difficult to remove.

[0043] The second and third fixed power storage devices are electrically connected via a normal charging cable and a normal charging input terminal. Therefore, unless the normal charging cable is connected to the normal charging input terminal, power will not be accidentally supplied from the second fixed power storage device to the third fixed power storage device. This reduces the possibility of damage to the third fixed power storage device, which is fixed to the housing and difficult to remove.

[0044] Preferably, the fixed power storage unit includes the first fixed power storage device and a third fixed power storage device. The first fixed power storage device stores power from at least the first power generation device of the power generation unit that is disposed away from the housing. The third fixed power storage device is used to drive a motor of the electric vehicle. The power stored in the first fixed power storage device is stored in the third fixed power storage device via a quick charger, a quick charge cable, and a quick charge terminal electrically connected to the third fixed power storage device.

[0045] More preferably, the electric power stored in the third fixed power storage device is supplied to the external electric device via the rapid charging terminal and a power supply cable.

[0046] The third fixed power storage device is primarily used to drive the motor. However, it has a larger battery capacity than the first and second fixed power storage devices. Therefore, in the event of a power outage or other power loss, the electric vehicle can be moved to the site and emergency power can be supplied to external electrical equipment, such as an apartment building elevator, via the power supply cable and quick-charging input terminal.

[0047] As described above, according to the present invention, it is possible to provide a power supply system capable of efficiently supplying power.

[0048] FIG. 1 is a configuration diagram of a power supply system as viewed from a side before the sixth terminal and the eleventh terminal are connected in the first embodiment; FIG. 1 is a configuration diagram of a movable power storage unit as viewed from a side in the first embodiment; FIG. 2 is a configuration diagram of a power supply system as viewed from a side after the sixth terminal and the eleventh terminal are connected in the first embodiment; FIG. 3 is a configuration diagram of a power supply system as viewed from a side before the sixth terminal and the eleventh terminal are connected in the second embodiment; FIG. 4 is a configuration diagram of a power supply system as viewed from a side after the sixth terminal and the eleventh terminal are connected in the second embodiment; FIG. 5 is a configuration diagram of a movable power storage unit as viewed from a side during charging in the third embodiment; FIG. 6 is a configuration diagram of a movable power storage unit as viewed from a side during discharging in the third embodiment; FIG. 7 is a configuration diagram of a movable power storage unit as viewed from a side during charging of a first power storage device in the fourth embodiment; FIG. 8 is a configuration diagram of a movable power storage unit as viewed from a side during charging of the first power storage device in the fifth embodiment; and FIG. 9 is a configuration diagram of a movable power storage unit as viewed from a side during discharging of the first power storage device and the fourth power storage device in the fifth embodiment. FIG. 13 is a configuration diagram of a power supply system according to a sixth embodiment, as viewed from above. FIG. 14 is a configuration diagram of a power supply system according to a seventh embodiment, as viewed from the front. FIG. 15 is a configuration diagram of a power supply system including a first DC power generating device when in use according to an eighth embodiment, as viewed from the front. FIG. 16 is a configuration diagram of a power supply system including a first DC power generating device when in use according to the eighth embodiment, as viewed from the side. FIG. 17 is a configuration diagram of a power supply system including a first DC power generating device when not in use according to the eighth embodiment, as viewed from the front. FIG. 18 is a configuration diagram of a power supply system including a first DC power generating device when not in use according to the eighth embodiment, as viewed from the side. FIG. 19 is a configuration diagram of a power supply system including a first DC power generating device when in use according to a ninth embodiment, as viewed from the side. FIG. 19 is a configuration diagram of a power supply system including a first DC power generating device when not in use according to the ninth embodiment, as viewed from the side. FIG. 20 is a configuration diagram of a movable power storage unit when the first power storage device is being charged according to a tenth embodiment.

[0049] The first embodiment will be described below with reference to the drawings. Note that the embodiments are not limited to the following embodiments. Furthermore, the content described in one embodiment is, in principle, also applicable to other embodiments. Furthermore, each embodiment and each modified example can be combined as appropriate.

[0050] (Power supply system 1) The power supply system 1 of the first embodiment includes a power generation unit 10, a terminal unit 20, a conversion unit 30, a fixed storage unit 40, a movable storage unit 50, a holding unit 60, a charging unit 70, and a power unit 80 (see Figures 1 to 3).

[0051] (Housing 2) The housing 2 is a housing (such as a luggage compartment) of the electric vehicle. The housing 2 houses at least the terminal unit 20, the conversion unit 30, the fixed power storage unit 40, and the charging unit 70. Of the power generation unit 10, the second DC power generation device 12 is attached to the top of the housing 2. Of the power generation unit 10, the first DC power generation device 11, the first AC power generation device 13, and the second AC power generation device 14 are arranged away from the housing 2. During charging, the movable power storage unit 50 is housed in the housing 2.

[0052] Possible electric vehicles including the housing 2 include ordinary passenger cars and trucks, as well as funeral vehicles and medical vehicles. Funeral vehicles include funeral halls with altars and coffins. Medical vehicles include medical examination equipment such as X-ray machines. The electric vehicle of the first embodiment is more likely to remain quiet than vehicles that include devices that generate sound and vibration when generating electricity, such as engines, and is therefore suitable for funeral vehicles and medical vehicles.

[0053] In the first embodiment, an example is described in which the housing 2 is the housing of an electric vehicle, but the housing 2 may be the housing of a non-electric vehicle (for example, a vehicle operated by an internal combustion engine). In this case, the seventh terminal 27, the eighth terminal 28, the third fixed power storage device 43, and the motor 81 are omitted, and the engine or the like rotates the wheels 82.

[0054] (Power Generation Unit 10) The power generation unit 10 has a first power generation device (first DC power generation device 11, first AC power generation device 13) and a second power generation device (second DC power generation device 12, second AC power generation device 14).

[0055] The first DC power generation device 11 is a power generation device (renewable energy-derived power generation device) that generates DC power using natural energy (renewable energy), such as a solar power generation device. The first DC power generation device 11 is provided outside the housing 2. The output of the first DC power generation device 11 is greater than the output of the second DC power generation device 12. When the second terminal 22 is connected to the first DC power generation device 11, the first DC power generation device 11 is always ready to generate power. The power generated by the first DC power generation device 11 is supplied to the first fixed power storage device 41 and the like via the second terminal 22 and the first conversion device 31. The first DC power generation device 11 includes a backflow prevention device such as a diode. When the first DC power generation device 11 is a solar power generation device, the first DC power generation device 11 may include an angle adjustment unit so that the light receiving surface of the light receiving panel is nearly perpendicular to the sunlight (see the eighth embodiment described below).

[0056] The second DC power generation device 12 is a power generation device (renewable energy-derived power generation device) that generates DC power using natural energy (renewable energy), such as a solar power generation device. The second DC power generation device 12 is placed on the upper surface of the housing 2. The second DC power generation device 12 is always in a state where it can generate power. The power obtained by the second DC power generation device 12 is supplied to the second fixed power storage device 42 or the like via the second conversion device 32. The second DC power generation device 12 includes a backflow prevention device such as a diode. When the second DC power generation device 12 is a solar power generation device, the second DC power generation device 12 may include an angle adjustment unit so that the light receiving surface of the light receiving panel is nearly perpendicular to the sunlight.

[0057] The first AC power generating device 13 is a power generating device, such as an LPG power generating device, that generates three-phase AC power based on kinetic energy obtained by an internal combustion engine or an external combustion engine. The first AC power generating device 13 is provided outside the housing 2. The output of the first AC power generating device 13 is greater than the output of the second AC power generating device 14. The third terminal 23 is connected to the first AC power generating device 13, and the first AC power generating device 13 is put into a state where it can generate power when, for example, the power supplied from the first DC power generating device 11 is insufficient. The power obtained by the first AC power generating device 13 is supplied to the first fixed power storage device 41 or the like via the third terminal 23 and the first conversion device 31.

[0058] The third terminal 23 may be connected to the first AC power generating device 13 when the first fixed power storage device 41 and the like are used for a load test of the first AC power generating device 13. In this case, the first conversion device 31, the first fixed power storage device 41, the third fixed power storage device 43, the movable power storage unit 50, the quick charger 72 and the like are used as loads (resistances) for the load test.

[0059] The first AC power generating device 13 may be connected to the first conversion device 31 after converting the flow of electricity from the first AC power generating device 13 from AC to DC. In this case, the third terminal 23 is connected between the second terminal 22 and the first DC / AC inverter 31a, not between the first DC / AC inverter 31a and the first AC / DC converter 31b. Note that the first AC power generating device 13 may be a power generating device (renewable energy-derived power generating device) that generates single-phase AC power using natural energy (renewable energy), such as a wind power generating device or a wave power generating device (see a seventh embodiment described later, FIG. 12 ).

[0060] The second AC power generating device 14 is a power generating device (renewable energy-derived power generating device) that generates single-phase AC power using natural energy (renewable energy), such as a wind power generating device or a wave power generating device. The second AC power generating device 14 is provided outside the housing 2. When the first terminal 21 is connected to the second AC power generating device 14, the second AC power generating device 14 is always in a state where it can generate power. However, if the second AC power generating device 14 is a wind power generating device and the wind force received by the second AC power generating device 14 exceeds a predetermined wind force, the second AC power generating device 14 is disabled from generating power. The power obtained by the second AC power generating device 14 is supplied to the second fixed power storage device 42 or the like via the first terminal 21 and the second conversion device 32.

[0061] The second AC power generating device 14 may be connected to the second conversion device 32 after converting the flow of electricity from the second AC power generating device 14 from AC to DC. In this case, the first terminal 21 is connected between the second AC power generating device 14 and the second DC / AC inverter 32a, not between the second DC / AC inverter 32a and the second AC / DC converter 32b.

[0062] The first DC power generation device 11, the first AC power generation device 13, and the second AC power generation device 14 may be attached to the upper surface of the housing 2, as with the second DC power generation device 12. In a seventh embodiment described later, an example is shown in which the first DC power generation device 11 is attached to the upper surface of the housing 2, and the first AC power generation device 13 is attached above the first DC power generation device 11 (see FIG. 12 ).

[0063] (Terminal portion 20) The terminal portion 20 has a first terminal 21, a second terminal 22, a third terminal 23, a fourth terminal 24, a fifth terminal 25, a sixth terminal 26, a seventh terminal 27, and an eighth terminal 28. Each terminal of the terminal portion 20 is provided on an outer wall or inside the housing 2.

[0064] The first terminal 21 is detachably connected to the second AC power generation device 14 via a cable. The first terminal 21 is connected to the second DC / AC inverter 32a and the second AC / DC converter 32b of the second conversion device 32. The first terminal 21 is an input terminal that receives power from the second AC power generation device 14.

[0065] The second terminal 22 is detachably connected to the first DC power generation device 11 via a cable. The second terminal 22 is connected to the first DC / AC inverter 31a of the first conversion device 31. The second terminal 22 is an input terminal for power from the first DC power generation device 11.

[0066] The third terminal 23 is detachably connected to the first AC power generation device 13 via a cable. The third terminal 23 is connected to the first DC / AC inverter 31 a and the first AC / DC converter 31 b of the first conversion device 31. The third terminal 23 is an input terminal for power from the first AC power generation device 13.

[0067] The fourth terminal 24 is connected to the normal charger 71. The fourth terminal 24 is detachably connected to the seventh terminal 27 via a normal charging cable 73. The fourth terminal 24 is an output terminal for power from the second DC power generation device 12 and the like via the normal charger 71.

[0068] The fifth terminal 25 is connected to the rapid charger 72. The fifth terminal 25 is detachably connected to the eighth terminal 28 via a rapid charge cable 74. The fifth terminal 25 is an output terminal for power from the first DC power generation device 11 and the like via the rapid charger 72.

[0069] The sixth terminal 26 is connected to the first AC / DC converter 31b of the first conversion device 31 and the first fixed power storage device 41. The sixth terminal 26 is detachably connected to the input terminal (eleventh terminal 51) of the movable power storage unit 50. The sixth terminal 26 is an output terminal for power from the first fixed power storage device 41 and the like.

[0070] The seventh terminal 27 is connected to the third fixed power storage device 43. The seventh terminal 27 is detachably connected to the fourth terminal 24 via a normal charging cable 73. The seventh terminal 27 is an input terminal (normal charging input terminal) for power from the second DC power generation device 12 and the like via the normal charger 71 and the normal charging cable 73.

[0071] The eighth terminal 28 is connected to the third fixed power storage device 43. The eighth terminal 28 is detachably connected to the fifth terminal 25 via a rapid charging cable 74. In this case, that is, when the rapid charging cable 74 is connected to the eighth terminal 28, the eighth terminal 28 serves as an input terminal (rapid charging input terminal) for power from the rapid charger 72 and the first DC power generation device 11 via the rapid charging cable 74.

[0072] Furthermore, the eighth terminal 28 is detachably connected to an external load (not shown) via a power supply cable 75. In this case, that is, when the power supply cable 75 is connected to the eighth terminal 28, the eighth terminal 28 is an output terminal for power from the third fixed power storage device 43.

[0073] (Conversion Unit 30) The conversion unit 30 includes a first conversion device 31 and a second conversion device 32.

[0074] The first conversion device 31 includes a first DC / AC inverter 31a and a first AC / DC converter 31b.

[0075] The first DC / AC inverter 31a converts the flow of electricity from the first DC power generation device 11 from DC to three-phase AC. The first AC / DC converter 31b is configured as a bidirectional AC / DC converter. The first AC / DC converter 31b converts the flow of electricity from the first DC / AC inverter 31a and the first AC power generation device 13 from three-phase AC to DC. The first AC / DC converter 31b converts the flow of electricity from the first fixed power storage device 41 from DC to three-phase AC.

[0076] The power obtained by the first DC power generation device 11 is supplied to the first fixed storage device 41 via the first DC / AC inverter 31a and the first AC / DC converter 31b, or to the third storage device 43 via the first DC / AC inverter 31a, a rapid charger 72 and a rapid charging cable 74, or to the storage device group 53 of the movable storage unit 50 via the first DC / AC inverter 31a and the first AC / DC converter 31b.

[0077] The power obtained by the first AC power generation device 13 is supplied to the first fixed power storage device 41 via the first AC / DC converter 31b, or to the third power storage device 43 via a rapid charger 72 and a rapid charging cable 74, or to the power storage device group 53 of the movable power storage unit 50 connected to the sixth terminal 26 via the first AC / DC converter 31b.

[0078] The second conversion device 32 includes a second DC / AC inverter 32a and a second AC / DC converter 32b.

[0079] The second DC / AC inverter 32a converts the flow of electricity from the second DC power generation device 12 from DC to single-phase AC. The second AC / DC converter 32b is configured as a bidirectional AC / DC converter. The second AC / DC converter 32b converts the flow of electricity from the second DC / AC inverter 32a and the second AC power generation device 14 from single-phase AC to DC. The second AC / DC converter 32b converts the flow of electricity from the second fixed power storage device 42 from DC to single-phase AC.

[0080] The power obtained by the second DC power generation device 12 is supplied to the second fixed power storage device 42 via the second DC / AC inverter 32a and the second AC / DC converter 32b, or to the third power storage device 43 via the second DC / AC inverter 32a, a normal charger 71, and a normal charging cable 73, or to electrical equipment of the electric vehicle including the housing 2 (such as the first holding device 61) via the second DC / AC inverter 32a and the second AC / DC converter 32b.

[0081] The power obtained by the second AC power generation device 14 is supplied to the second fixed power storage device 42 via the second AC / DC converter 32b, or to the third power storage device 43 via a normal charger 71 and a normal charging cable 73, or to electrical equipment (such as the first holding device 61) of the electric vehicle including the housing 2 via the second AC / DC converter 32b.

[0082] (Fixed Power Storage Unit 40) The fixed power storage unit 40 has a first fixed power storage device 41, a second fixed power storage device 42, and a third fixed power storage device 43. Each of the fixed power storage devices of the fixed power storage unit 40 is fixed inside the housing 2.

[0083] The first fixed power storage device 41 has a charging device and a power storage device that store power supplied from the first DC power generation device 11 and the first AC power generation device 13. The power stored in the first fixed power storage device 41 is supplied to the third fixed power storage device 43 via a quick charger 72 and a quick charging cable 74. The power stored in the first fixed power storage device 41 is also supplied to the power storage device group 53 of the movable power storage unit 50 connected to the sixth terminal 26.

[0084] The second fixed power storage device 42 has a charging device and a power storage device that store power supplied from the second DC power generation device 12 and the second AC power generation device 14. The power stored in the second fixed power storage device 42 is supplied to the third fixed power storage device 43 via a normal charger 71 and a normal charging cable 73. The power stored in the second fixed power storage device 42 is also supplied to electrical equipment (such as the first holding device 61) of the electric vehicle including the housing 2.

[0085] The third fixed power storage device 43 includes a charging device and a power storage device that store the power supplied from the power generation unit 10, the second fixed power storage device 42, and the first fixed power storage device 41. The power stored in the third fixed power storage device 43 is supplied to the motor 81.

[0086] The battery capacity of the third fixed power storage device 43 is larger than that of the first fixed power storage device 41. The battery capacity of the first fixed power storage device 41 is larger than that of the second fixed power storage device 42. For example, the battery capacity of the second fixed power storage device 42 is 15 kWh, the battery capacity of the first fixed power storage device 41 is 40 kWh, and the battery capacity of the third fixed power storage device 43 is 125 kWh.

[0087] (Moveable Power Storage Unit 50 ) The movable power storage unit 50 has an eleventh terminal 51 , a twelfth terminal 52 , a power storage device group 53 , movable power storage device wheels 54 , and a switching unit 55 .

[0088] The eleventh terminal 51 is detachably connected to the sixth terminal 26. The eleventh terminal 51 is connected in parallel to the first to fourth power storage devices 53 a to 53 d of the power storage device group 53. The eleventh terminal 51 is an input terminal for power from the first fixed power storage device 41 and the like.

[0089] The twelfth terminal 52 is connected in parallel to the first to fourth power storage devices 53 a to 53 d of the power storage device group 53. The twelfth terminal 52 is connected to an external electrical device (not shown). The twelfth terminal 52 is an output terminal for power from the power storage device group 53.

[0090] It is desirable that the eleventh terminal 51 be provided at a position at a different height from the twelfth terminal 52. For example, the eleventh terminal 51 is provided at a position higher than the twelfth terminal 52. Specifically, the eleventh terminal 51 is provided at an upper part of the housing of the movable power storage unit 50, and the twelfth terminal 52 is provided at a side part of the case 50 a of the movable power storage unit 50.

[0091] The power storage device group 53 has charging devices and power storage devices that store power supplied from the first fixed power storage device 41 and the like. The power storage device group 53 includes a first power storage device 53a, a second power storage device 53b, a third power storage device 53c, and a fourth power storage device 53d as the power storage devices. However, the number of power storage devices is not limited to four. The power stored in the power storage device group 53 is supplied to an external electrical device connected to the twelfth terminal 52.

[0092] That is, when the sixth terminal 26 is connected to the eleventh terminal 51, power is supplied from the first fixed storage device 41 etc. to the storage device group 53, and when an external electrical device is connected to the twelfth terminal, power is supplied from the storage device group 53 to the external electrical device.

[0093] The movable power storage device wheels 54 are wheels provided on the lower part of the power storage device group 53. The rotation of the movable power storage device wheels 54 makes the movable power storage unit 50 movable.

[0094] The switching unit 55 has a first switch 55 a and a second switch 55 b. When the first switch 55 a is in an on state, power can be supplied from the first fixed power storage device 41 and the like to the power storage device group 53 via the eleventh terminal 51. When the second switch 55 b is in an on state, power can be supplied from the power storage device group 53 to external electrical equipment via the twelfth terminal 52.

[0095] It is desirable to provide a connection detection member and a control member so that the first switch 55a is turned on when the sixth terminal 26 is connected to the eleventh terminal 51. It is desirable to provide a connection detection member and a control member so that the second switch 55b is turned on when an external electrical device is connected to the twelfth terminal 52. The first switch 55a and the second switch 55b are controlled so that both switches are not turned on at the same time, i.e., at least one of them is turned off.

[0096] (Holding unit 60) The holding unit 60 of the first embodiment has a first holding device (tailgate lifting device) 61. The first holding device 61 holds the movable power storage unit 50 such that, when the movable power storage unit 50 is lifted and stored in the housing 2, the eleventh terminal 51 is connected to the sixth terminal 26. In order to hold the movable power storage unit 50 in a state in which the movable power storage unit 50 cannot move horizontally, a stopper (first fastener 61 a) is provided in an area of ​​the first holding device 61 that comes into contact with the movable power storage unit wheels 54. The first holding device 61 holds the movable power storage unit 50 such that, when the movable power storage unit 50 is lifted and stored in the housing 2, the eleventh terminal 51 is connected to the sixth terminal 26.

[0097] (Charging Unit 70 ) The charging unit 70 includes a normal charger 71 , a rapid charger 72 , a normal charging cable 73 , a rapid charging cable 74 , and a power supply cable 75 .

[0098] The normal charger 71 connects the second DC / AC inverter 32a, the second AC / DC converter 32b, and the first terminal 21. The normal charger 71 is also connected to the fourth terminal 24. The normal charger 71 converts the electrical flow of the power from the second DC / AC inverter 32a, the power from the second AC / DC converter 32b, and the power from the second AC power generation device 14 from single-phase AC to DC. The normal charger 71 also converts the power from the second DC / AC inverter 32a, the power from the second AC / DC converter 32b, and the power from the second AC power generation device 14 into a current and voltage suitable for charging the third fixed power storage device 43, and supplies the converted power to the third fixed power storage device 43 via a normal charging cable 73 or the like.

[0099] The quick charger 72 is connected to the first DC / AC inverter 31a, the first AC / DC converter 31b, and the third terminal 23. The quick charger 72 is also connected to the fifth terminal 25. The quick charger 72 converts the flow of electricity from the first DC / AC inverter 31a, the first AC / DC converter 31b, and the first AC power generation device 13 from three-phase AC to DC. The quick charger 72 also converts the power from the first DC / AC inverter 31a, the first AC / DC converter 31b, and the first AC power generation device 13 into a current and voltage suitable for charging the third fixed power storage device 43, with at least one of the voltage and current increased, and supplies the current and voltage to the third fixed power storage device 43 via a quick charge cable 74 or the like.

[0100] The normal charging cable 73 is an electric cable for electrically connecting the fourth terminal 24 and the seventh terminal 27. The normal charging cable 73 is, for example, a coaxial cable, and includes an electric wire, a sheath covering the electric wire, a terminal connecting to the fourth terminal 24, and a terminal connecting to the seventh terminal 27. The electric wire is composed of an inner conductor, an insulator covering the inner conductor, and an outer conductor covering the insulator, and the sheath covers the outer conductor. However, the normal charging cable 73 is not limited to a coaxial cable. For example, the electric wire may include a positive inner conductor and a negative inner conductor arranged in parallel with the positive inner conductor across an insulator, and these may be covered by the sheath. Note that the fourth terminal 24 may be omitted, and the normal charger 71 and the normal charging cable 73 may be directly connected. In this case, the fourth terminal 24 is omitted.

[0101] The quick charging cable 74 is an electric cable for electrically connecting the fifth terminal 25 and the eighth terminal 28. The quick charging cable 74 is, for example, a coaxial cable, and includes an electric wire, a covering covering the electric wire, a terminal connected to the fifth terminal 25, and a terminal connected to the eighth terminal 28. The electric wire is composed of an inner conductor, an insulator covering the inner conductor, and an outer conductor covering the insulator, and the covering covers the outer conductor. However, the quick charging cable 74 is not limited to a coaxial cable. For example, the electric wire may include a positive inner conductor and a negative inner conductor arranged in parallel with the positive inner conductor across an insulator, and these may be covered by the covering. Note that the fifth terminal 25 may be omitted, and the quick charger 72 and the quick charging cable 74 may be directly connected. In this case, the fifth terminal 25 is omitted.

[0102] The power supply cable 75 is an electric cable for electrically connecting the eighth terminal 28 to an external electric device. The power supply cable 75 is, for example, a coaxial cable, and includes an electric wire, a coating covering the electric wire, a terminal for connecting to the eighth terminal 28, and a terminal for connecting to an external electric device. The electric wire is composed of an inner conductor, an insulator covering the inner conductor, and an outer conductor covering the insulator, and the coating covers the outer conductor. However, the power supply cable 75 is not limited to a coaxial cable. For example, the electric wire may include a positive inner conductor and a negative inner conductor arranged in parallel with the positive inner conductor across an insulator, and these may be covered by the coating. The quick charging cable 74 described above may also be used as the power supply cable 75.

[0103] (Power Unit 80) The power unit 80 has a motor 81 and wheels 82. The motor 81 is driven based on electric power from the third fixed power storage device 43, and rotates the wheels 82.

[0104] (Effect of Providing Movable Power Storage Unit 50) The movable power storage unit 50 can be charged by being placed on the first holding device 61 and receiving power supply via the sixth terminal 26 and the like. The movable power storage unit 50 can also be moved on a surface away from the first holding device 61. Therefore, the movable power storage unit 50 can be moved independently to the vicinity of an electrical device located away from the housing 2, and power can be supplied to the electrical device via the twelfth terminal 52. In other words, charging / discharging can be performed efficiently using the movable power storage unit 50.

[0105] (Effect of providing the 11th terminal 51 and the 12th terminal 52 at different height positions) It is easy to prevent incorrect wiring of the 11th terminal 51 for charging (input) and the 12th terminal 52 for discharging (output).

[0106] (Effect of Providing the Eleventh Terminal 51 at a Higher Position Than the Twelfth Terminal 52) It becomes easier to arrange the first conversion device 31 and the like at a higher position in the housing 2, and the storage space inside the housing 2 can be made larger.

[0107] (Effect of Providing First Retaining Device 61) Using a tailgate lifting / lowering device (first retaining device 61) provided in the electric vehicle, it becomes possible to easily move movable power storage unit 50 to a predetermined position inside housing 2. By arranging sixth terminal 26 and the like at a high position inside housing 2, it becomes easier to effectively utilize the space inside housing 2 compared to a configuration in which sixth terminal 26 and the like are arranged at a medium height position inside housing 2.

[0108] (Effect of Providing the First Fixed Power Storage Device 41 and the Second Fixed Power Storage Device 42) Power from the first power generation devices (first DC power generation device 11, first AC power generation device 13) that have large output and are less restricted in installation area, such as outside the housing 2, is stored in the first fixed power storage device 41 that has a large storage battery capacity. Power from the second power generation devices (second DC power generation device 12, second AC power generation device 14) that have small output and are more restricted in installation area, such as on the top surface of the housing 2, is stored in the second fixed power storage device 42 that has a small storage battery capacity. This makes it possible to efficiently charge by selectively using two fixed power storage devices with different storage battery capacities depending on the difference in output.

[0109] (Effects of Providing the First, Second, and Third Fixed Power Storage Devices 41, 42, and 43) Power is temporarily stored in the first fixed power storage device 41 and the second fixed power storage device 42. Therefore, power can be immediately supplied from the first fixed power storage device 41 to the third fixed power storage device 43 via the rapid charging cable 74 without complicating the control of power supply from the third fixed power storage device 43 to the motor 81. Furthermore, power can be immediately supplied from the second fixed power storage device 42 to the third fixed power storage device 43 via the normal charging cable 73. This makes it possible to use the first fixed power storage device 41, etc. as a battery (backup power source) for the third fixed power storage device 43.

[0110] (Effect of supplying power to the third fixed power storage device 43 via the quick charge cable 74 and the eighth terminal 28) The first fixed power storage device 41 and the third fixed power storage device 43 are electrically connected via the quick charge cable 74 and the eighth terminal 28. Therefore, unless the quick charge cable 74 is connected to the eighth terminal 28, power will not be accidentally supplied from the first fixed power storage device 41 to the third fixed power storage device 43. This reduces the possibility of damage to the third fixed power storage device 43, which is fixed to the housing 2 and difficult to remove.

[0111] (Effect of supplying power to the third fixed power storage device 43 via the normal charging cable 73 and the seventh terminal 27) The second fixed power storage device 42 and the third fixed power storage device 43 are electrically connected via the normal charging cable 73 and the seventh terminal 27. Therefore, unless the normal charging cable 73 is connected to the seventh terminal 27, power will not be accidentally supplied from the second fixed power storage device 42 to the third fixed power storage device 43. This reduces the possibility of damage to the third fixed power storage device 43, which is fixed to the housing 2 and difficult to remove.

[0112] (Effect of supplying power from the third fixed power storage device 43 to external electrical equipment via the power supply cable 75 and the eighth terminal 28) The third fixed power storage device 43 is mainly used to drive the motor 81. However, the third fixed power storage device 43 has a larger storage battery capacity than the first fixed power storage device 41 and the second fixed power storage device 42. Therefore, in the event of a power outage or other power loss, the electric vehicle can be moved to the site, and emergency power can be supplied to external electrical equipment, such as an elevator in an apartment building, via the power supply cable 75 and the eighth terminal 28. Note that power may also be supplied from the third fixed power storage device 43 to external electrical equipment via the power supply cable 75 and the eighth terminal 28, not limited to emergency power supply in the event of a power loss.

[0113] (Advantages of being able to utilize existing electric vehicles, etc.) The electric vehicle of this embodiment can be easily formed by simply adding the second DC power generation device 12, the second fixed power storage device 42, etc. to an existing electric vehicle or plug-in hybrid vehicle that includes the third fixed power storage device 43, the seventh terminal 27, the eighth terminal 28, the motor 81, and the wheels 82. Because power is supplied via the seventh terminal 27 or the eighth terminal 28 rather than directly to the third fixed power storage device 43, there is little possibility that the second DC power generation device 12, etc. added to an existing electric vehicle, etc. will adversely affect the control and / or operation of the third fixed power storage device 43 and / or the motor 82.

[0114] (Application example of holding unit 60, second embodiment) In the first embodiment, an example has been described in which the first holding device 61 (tailgate lifting device) attached to the housing 2 holds the movable power storage unit 50. However, another holding device (second holding device 62) may hold the movable power storage unit 50 (see FIGS. 4 and 5 ). The holding unit 60 of the second embodiment has the second holding device (cart) 62. Note that FIG. 4 omits illustration of some of the members constituting the power supply system 1, such as the first terminal 21.

[0115] When housed in the housing 2, the second holding device 62 holds the movable power storage unit 50 so that the eleventh terminal 51 is connected to the sixth terminal 26. In order to hold the movable power storage unit 50 in a state in which the movable power storage unit 50 cannot move horizontally, a stopper (second stopper 62a) is provided in an area of ​​the second holding device 62 that comes into contact with the movable power storage unit wheels 54. Of the wheels of the second holding device 62, the wheel that faces the housing 2 constitutes a retractable wheel 62b. Before housed in the housing 2, the retractable wheel 62b functions as a front wheel of the second holding device 62. When housed in the housing 2, the retractable wheel 62b is folded. At this time, the front side of the second holding device 62 is held by a member inside the housing 2.

[0116] (Effect of Providing Second Holding Device 62) With the movable power storage unit 50 held by the second holding device 62, it becomes possible to move the movable power storage unit 50 to a position away from the housing 2. Furthermore, by folding the retractable wheels 62 b, it becomes possible to easily move the movable power storage unit 50 into the housing 2.

[0117] (Application example when housing 2 includes a tailgate lifting device) When housing 2 includes a tailgate lifting device, the holding surface of the tailgate lifting device may be raised to a state substantially flush with the installation surface of second holding device 62 on which movable power storage unit 50 is placed, and movable power storage unit 50 may be moved from second holding device 62 to the holding surface. In this case, when movable power storage unit 50 is placed on second holding device 62, eleventh terminal 51 and sixth terminal 26 are positioned at the same height.

[0118] (Application Example 1 of Connection of Power Storage Device Group 53) In the first and second embodiments, the example has been described in which the eleventh terminal 51 and the power storage device group 53 are connected in parallel, and the twelfth terminal 52 and the power storage device group 53 are connected in parallel. However, the eleventh terminal 51 and the power storage device group 53 may be connected in series, and the twelfth terminal 52 and the power storage device group 53 may be connected in series.

[0119] (Application Example 2 and Third Embodiment of Connection of Power Storage Device Group 53) Alternatively, either the eleventh terminal 51 and the power storage device group 53 or the twelfth terminal 52 and the power storage device group 53 may be connected in series, and the other may be connected in parallel (see FIGS. 6 and 7 , Third Embodiment). In this case, a plurality of first switches 55 a and a plurality of second switches 55 b are provided, and switching control is performed so that either the eleventh terminal 51 and the power storage device group 53 or the twelfth terminal 52 and the power storage device group 53 is connected in series, and the other is connected in parallel. For example, the eleventh terminal 51 and the power storage device group 53 are connected in series, and the twelfth terminal 52 and the power storage device group 53 are connected in parallel. In this case, it is easy to prevent backflow of electricity or short circuit during charging, which is caused by differences in the charging rates of the power storage devices.

[0120] (Application example of second fixed power storage device 42, etc.) In the first to third embodiments, an example has been described in which power storage device group 53 of movable power storage unit 50 includes a plurality of power storage devices (first power storage device 53a to fourth power storage device 53d). However, each of second fixed power storage device 42 to third fixed power storage device 43 may also include a plurality of power storage devices. In this case, among second fixed power storage device 42 to third fixed power storage device 43, one including a plurality of power storage devices may be connected in parallel during charging and discharging, may be connected in series during charging and discharging, or may be connected in series during either charging or discharging and connected in parallel during the other of charging or discharging.

[0121] (Application Example of Charging Method for Power Storage Device Group 53, Fourth Embodiment) In the first to third embodiments, an example has been described in which the first to fourth power storage devices 53a to 53d of the power storage device group 53 are simultaneously charged. However, the first to fourth power storage devices 53a to 53d may be charged at different times (see FIG. 8 , Fourth Embodiment). In this case, the eleventh terminal 51 and the power storage device group 53 are connected in parallel, and a third switch 55c is provided between the eleventh terminal 51 and each of the first to fourth power storage devices 53a to 53d. Of the power storage devices in the power storage device group 53, the third switch 55c corresponding to the one to be charged is turned on, and the other third switches 55c are turned off. After charging is completed, one of the other third switches 55c is turned on, and charging of another power storage device is started.

[0122] In this case, it is easy to prevent backflow or short circuit of electricity during charging, which is caused by differences in the charging rate of each power storage device.

[0123] The switching of third switch 55c is performed by control device 56 of movable power storage unit 50, based on the charge rates of first to fourth power storage devices 53a to 53d, etc. Fig. 8 shows a state in which first power storage device 53a is being charged, but second to fourth power storage devices 53b to 53d are not being charged.

[0124] Furthermore, each of the first to fourth power storage devices 53a to 53d may be detachably held in the case 50a of the movable power storage unit 50. In this case, the movable power storage unit 50 includes a holder 57 that detachably holds each of the first to fourth power storage devices 53a to 53d. Fig. 8 shows a state in which the first, third, and fourth power storage devices 53a, 53c, and 53d are held by the holder 57, and the second power storage device 53b has been removed from the holder 57.

[0125] By removing it, it is possible to easily replace the storage device alone.

[0126] Note that the switching control of the third switch 55c is not limited to a configuration in which charging of one power storage device is completed before charging of another power storage device is initiated. For example, a configuration in which the control device 56 gradually increases the charging rates of the four power storage devices so that the charging rates of the four power storage devices become equal is conceivable. Specifically, the control device 56 repeatedly charges the power storage device with the lowest charging rate until its charging rate becomes equal to that of the power storage device with the highest charging rate, until the charging rates of the four power storage devices become approximately equal. Then, the control device 56 charges one power storage device so that its charging rate increases by a predetermined percentage (e.g., 10%). Then, the control device 56 repeatedly charges the power storage device with the lowest charging rate until its charging rate becomes equal to that of the power storage device with the highest charging rate, until the charging rates of the four power storage devices become approximately equal. This allows the four power storage devices to be discharged while their charging rates are approximately equal.

[0127] Furthermore, information regarding the state of movable power storage unit 50, i.e., whether or not a power storage device is held in holder 57, the charging rate of the power storage device held in holder 57, etc., may be transmitted to an external device. In this case, movable power storage unit 50 includes an information acquisition unit 58 that acquires information from a sensor or the like that acquires information regarding the position information of movable power storage unit 50, whether or not a power storage device is held in holder 57, the charging / discharging state indicating whether the power storage device held in holder 57 is being charged or discharged, the charging rate, etc., and an information transmission unit 59 that transmits the information acquired by information acquisition unit 58. Information transmission unit 59 transmits such information to a communication unit (not shown) mounted on housing 2, an external electrical device (not shown), etc.

[0128] It becomes possible to know the status of the movable power storage unit 50 using an external device or the like.

[0129] (Application Example of the Eleventh Terminal 51 and the Twelfth Terminal 52, Fifth Embodiment) In the first to fourth embodiments, examples have been described in which the eleventh terminal 51 and the twelfth terminal 52 are configured as separate terminals (configured as separate bodies). However, one terminal (dual-purpose terminal 51 a) may be used as both an input terminal for charging (the eleventh terminal 51) and an output terminal for discharging (the twelfth terminal 52) (see FIGS. 9 and 10 , fifth embodiment).

[0130] The movable power storage unit 50 of the fifth embodiment has a dual-purpose terminal 51a instead of the eleventh terminal 51 and the twelfth terminal 52. The dual-purpose terminal 51a functions as both the eleventh terminal 51 and the twelfth terminal 52. In the fifth embodiment, the first switch 55a and the second switch 55b are omitted.

[0131] The dual-purpose terminal 51a may be fixed in one location (for example, the top of the case 50a, like the eleventh terminal 51), or may be attached to the case 50a in a movable state to two or more locations. For example, when the dual-purpose terminal 51a is used as the eleventh terminal 51, the dual-purpose terminal 51a is disposed in a position facing the sixth terminal 26 (the top of the case 50a) (see FIG. 9). When the dual-purpose terminal 51a is used as the twelfth terminal 52, the dual-purpose terminal 51a is disposed in a position facing a terminal of an external electrical device (the side surface of the case 50a) (see FIG. 10).

[0132] In this case, at least a part of the electric wire connecting power storage device group 53 and dual-purpose terminal 51 a in movable power storage unit 50 is made of a flexible and stretchable member (stretchable member 51 b), such as a curled cord or a flexible substrate. Fig. 9 shows an example of a state in which stretchable member 51 b contracts to charge first power storage device 53 a, and Fig. 10 shows an example of a state in which stretchable member 51 b expands to discharge first power storage device 53 a and fourth power storage device 53 d.

[0133] This allows one terminal (combined terminal 51 a) to be used as both an input terminal for charging and an output terminal for discharging. In addition, because combined terminal 51 a is movably attached to case 50 a, it can be easily connected to sixth terminal 26 or a terminal of an external electrical device.

[0134] (Application Example of Sixth Terminal 26, Sixth Embodiment) In the first to fifth embodiments, an example has been described in which the power supply system 1 has one sixth terminal 26. However, the power supply system 1 may have a plurality of sixth terminals 26 (see FIG. 11 , Sixth Embodiment).

[0135] The sixth embodiment shows an example in which six sixth terminals 26 and first conversion devices 31 are provided, and six movable power storage units 50 can be held in the housing 2 of the power supply system 1. Moreover, Fig. 11 shows a state in which three sixth terminals 26 are provided on the right rear and three on the left rear of the housing 2, movable power storage units 50 are connected to four of the sixth terminals 26, no movable power storage units 50 are connected to two of the sixth terminals 26, and one movable power storage device 50 is located at the boundary between the first holding device 61 and the housing 2.

[0136] This makes it possible to mount and charge a plurality of movable power storage units 50 in the housing 2. The number of sixth terminals 26 is not limited to six, and a plurality of sixth terminals 26 may be provided depending on the space available in the housing 2. It is also desirable to provide a switch that controls on / off the supply of power to each of the plurality of sixth terminals 26 based on the charge states of the plurality of movable power storage units 50, etc. In this case, power is supplied to the sixth terminal 26 to which the movable power storage unit 50 that needs to be charged is attached by controlling on / off of the switch. The switch is, for example, built into the first conversion device 31.

[0137] (Application Example of Power Supply System 1, Seventh Embodiment) In the first to sixth embodiments, an example has been described in which the housing 2 of the power supply system 1 is the housing of an electric vehicle. However, the housing 2 of the power supply system 1 is not limited to the housing of an electric vehicle. For example, the housing 2 may be a housing that does not have anything equivalent to wheels 82 (seventh embodiment, see FIG. 12 ).

[0138] The power supply system 1 of the seventh embodiment includes a power generation unit 10, a terminal unit 20, a conversion unit 30, a fixed power storage unit 40, a movable power storage unit 50, a holding unit 60, and a charging unit 70. However, the power supply system 1 of the seventh embodiment does not include a power unit 80, and the housing 2 is fixed to the ground or the like. The power generation unit 10 includes a first DC power generation device 11 configured as a solar power generation device and a first AC power generation device 13 configured as a wind power generation device. The terminal unit 20 includes a fifth terminal 25 and a sixth terminal 26. The conversion unit 30 includes a first conversion device 31. The fixed power storage unit 40 includes a first fixed power storage device 41. The movable power storage unit 50 includes an eleventh terminal 51, a twelfth terminal 52, and a power storage device group 53. The holding unit 60 includes a first fastener 61 a. The charging unit 70 includes a quick charger 72 and a quick charging cable 74.

[0139] In Figure 12, the second DC power generation device 12, the second AC power generation device 14, the first terminal 21, the second terminal 22, the third terminal 23, the fourth terminal 24, the seventh terminal 27, the eighth terminal 28, the second conversion device 32, the second fixed storage battery device 42, the normal charger 71, and the normal charging cable 73 are omitted, but these may also be provided.

[0140] The power supply system 1 of the seventh embodiment can be used as a charging stand. Power is supplied from the first fixed power storage device 41 to an external electrical device via a quick charge cable 74. Alternatively, power may be supplied from the movable power storage unit 50 to an external electrical device via the quick charge cable 74. In this case, the twelfth terminal 52 is connected to the sixth terminal 26 instead of the eleventh terminal 51.

[0141] (Application Example 1 of First DC Power Generator 11, Eighth Embodiment) In the seventh embodiment, the first DC power generator 11 is fixed to the top of the housing 2. However, the first DC power generator 11 may be storable when not in use (eighth embodiment, see FIGS. 13 to 16). The internal configuration of the housing 2 in the eighth embodiment is the same as that of the seventh embodiment. Note that FIGS. 14 and 16 omit illustration of the internal structure of the housing 2. The first DC power generator 11 in the eighth embodiment constitutes a solar power generator and includes a light-receiving panel 11a, an angle adjustment unit 11b, and a height adjustment unit 11c.

[0142] The light-receiving panel 11a is a solar panel that receives sunlight. The angle adjustment unit 11b adjusts the angle of the light-receiving surface of the light-receiving panel 11a and holds the light-receiving panel 11a. The height adjustment unit 11c is formed of an extendable rod-shaped member or the like, holds the angle adjustment unit 11b, and adjusts the height of the light-receiving panel 11a. In the eighth embodiment, an example will be described in which the angle adjustment unit 11b holds the light-receiving panel 11a and the height adjustment unit 11c holds the angle adjustment unit 11b, but the height adjustment unit 11c may also hold the light-receiving panel 11a.

[0143] Specifically, when solar power generation is performed during the daytime, the angle adjustment unit 11b holds the light-receiving panel 11a so that the light-receiving surface of the light-receiving panel 11a is nearly perpendicular to the sunlight, and the height adjustment unit 11c extends to hold the light-receiving panel 11a at a high position and holds the angle adjustment unit 11b (use mode, see FIGS. 13 and 14).When solar power generation is not performed during the night, the angle adjustment unit 11b holds the light-receiving panel 11a so that the light-receiving surface of the light-receiving panel 11a faces upward, and the height adjustment unit 11c retracts to hold the light-receiving panel 11a at a low position and holds the angle adjustment unit 11b (non-use mode, see FIGS. 15 and 16).

[0144] The height adjustment unit 11c may adjust the height of the light receiving panel 11a by having a rod-shaped member protrude from or retract into the housing 2 without extending or contracting.

[0145] In addition, the height adjustment unit 11c may detect the wind force around the power supply system 1, and if the detected wind force exceeds a wind force threshold, the height adjustment unit 11c and the angle adjustment unit 11b may operate in a non-use mode.

[0146] This makes it possible to efficiently generate solar power and prevent damage to the solar power generation device (first DC power generation device 11) due to strong winds.

[0147] Furthermore, when the detected wind force exceeds a wind force threshold, in order to make the first AC power generation device 13 formed of a wind power generation device less susceptible to the influence of wind, the height adjustment unit 11c may lay the first AC power generation device 13 on its side or store it inside the housing 2. Furthermore, the height adjustment unit 11c may detect wind forces at different height positions and hold the first AC power generation device 13 at a height at which the optimum wind force for wind power generation is obtained.

[0148] This makes it possible to efficiently generate wind power and prevent damage to the wind power generation device (first AC power generation device 13) due to strong winds.

[0149] (Application Example 2 of First DC Power Generator 11, Ninth Embodiment) The manner in which the first DC power generator 11 is stored when not in use is not limited to that of the eighth embodiment (Ninth embodiment, see FIGS. 17 to 18). The internal configuration of the housing 2 in the ninth embodiment is the same as the internal configuration of the housing 2 in the eighth embodiment. Note that FIGS. 17 and 18 omit illustration of the internal structure of the housing 2. The first DC power generator 11 in the ninth embodiment constitutes a solar power generator and has a light-receiving panel 11a, an angle adjustment unit 11b, a height adjustment unit 11c, and a connection unit 11d.

[0150] The light-receiving panel 11a is a solar panel having light-receiving surfaces on both the front and back sides. Specifically, one side receives direct sunlight, and the other side receives reflected sunlight. The light-receiving panel 11a is preferably made of a transparent material such as glass. The angle adjustment unit 11b adjusts the angle of the light-receiving surface of the light-receiving panel 11a and holds the light-receiving panel 11a. In the ninth embodiment, multiple light-receiving panels 11a are connected by the connection unit 11d, so that the angle of the light-receiving panel 11a changes as the height of each angle adjustment unit 11b changes. The height adjustment unit 11c is made of an extendable rod-shaped member or the like, holds the angle adjustment unit 11b, and adjusts the height of the light-receiving panel 11a. The connection unit 11d connects adjacent light-receiving panels 11a in the vertical direction. Therefore, the light-receiving panels 11a and the connection unit 11d constitute a foldable solar panel. When the rod-shaped members constituting the height adjustment unit 11c extend, the spacing between the angle adjustment units 11b increases, and the light-receiving panels 11a become tilted (see FIG. 17). For example, when the rod-shaped members constituting the height adjustment unit 11c are fully extended, each of the light-receiving panels 11a becomes nearly perpendicular to the horizontal plane. When the rod-shaped members constituting the height adjustment unit 11c contract, the spacing between the angle adjustment units 11b decreases, and the light-receiving panels 11a become horizontal (see FIG. 18).

[0151] This makes it possible to generate solar power efficiently and prevent damage to the solar power generation device (first DC power generation device 11) due to strong winds. In addition, the angle of the light-receiving panel 11a can be changed in conjunction with the extension and contraction of the height adjustment unit 11c, which simplifies the structure of the angle adjustment unit 11b.

[0152] (Application example of movable power storage unit 50, tenth embodiment) In the first embodiment, an example has been described in which the first conversion device 31 of the conversion unit 30 and the like are configured separately from the movable power storage unit 50. However, the movable power storage unit 50 may include the first conversion device 31 or the second conversion device 32 of the conversion unit 30 (tenth embodiment, see FIG. 19 ). In the tenth embodiment, the first conversion device 31 or the second conversion device 32 is provided between the shared terminal 51 a and the power storage device group 53.

[0153] In this case, the power obtained in the power generation unit 10 is supplied to the power storage device group 53 of the movable power storage unit 50 via the first conversion device 31 or the second conversion device 32 provided in the movable power storage unit 50. Furthermore, the power stored in the movable power storage unit 50 is supplied to the external electrical equipment via the first conversion device 31 or the second conversion device 32 provided in the movable power storage unit 50. Therefore, even if there is no equipment equivalent to the conversion unit 30 on the power generation unit 10 side, the power obtained in the power generation unit 10 can be efficiently supplied to the power storage device group 53. Furthermore, even if there is no equipment equivalent to the conversion unit 30 around the external electrical equipment, the power stored in the movable power storage unit 50 can be efficiently supplied to the external electrical equipment.

[0154] The dual-purpose terminal 51a may be configured as a single connector including the positive and negative electrodes, or as shown in FIG. 19, may be configured as separate connectors for the positive and negative electrodes.

[0155] It is also preferable that a display device 57a that displays the charge / discharge state, indicating whether the power storage device is charging or discharging, and the charge rate be provided on the power storage device (such as the first power storage device 53a) of the power storage device group 53 or on the holder 57. Fig. 19 shows an example in which the display device 57a is provided on the holder 57.

[0156] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are intended to be included within the scope and spirit of the invention, as well as within the scope of the invention described in the claims and their equivalents.

[0157] REFERENCE SIGNS LIST 1 Power supply system 2 Housing 10 Power generation unit 11 First DC power generation device 11a Light receiving panel 11b Angle adjustment unit 11c Height adjustment unit 11d Connection unit 12 Second DC power generation device 13 First AC power generation device 14 Second AC power generation device 20 Terminal unit 21 First terminal (for second AC power generation device) 22 Second terminal (for first DC power generation device) 23 Third terminal (for first AC power generation device) 24 Fourth terminal (for normal charger) 25 Fifth terminal (for rapid charger) 26 Sixth terminal (for movable energy storage device) 27 Seventh terminal (normal charging input terminal) 28 Eighth terminal (rapid charging input terminal) 30 Conversion unit 31 First conversion device (three-phase → single-phase) 31a First DC / AC inverter 31b First AC / DC converter 32 Second conversion device (single-phase → three-phase) 32a Second DC / AC inverter 32b Second AC / DC converter 40 Fixed power storage unit 41 First fixed power storage device (medium capacity) 42 Second fixed power storage device (small capacity) 43 Third fixed power storage device (for motor, large capacity) 50 Movable power storage unit 50a Case 51 Eleventh terminal (input terminal) 51a Dual-purpose terminal 51b Elastic member 52 Twelfth terminal (output terminal) 53 Power storage device group 53a to 53d First to fourth power storage devices 54 Wheel for movable power storage device 55 Switching unit 55a First switch 55b Second switch 55c Third switch 56 Control device 57 Holder 57a Display device 58 Information acquisition unit 59 Information transmission unit 60 Holding unit 61 First holding device (tailgate lifting / lowering device) 61a First fastener 62 Second holding device (cart) 62a Second fastener 62b Retractable wheel 70 Charging unit 71 Normal charger 72 Rapid charger 73 Normal charging cable 74 Rapid charging cable 75 Power supply cable 80 Power unit 81 Motor 82 Wheel

Claims

1. A power supply system comprising: a power generation unit having a first power generation device; a fixed power storage unit having a first fixed power storage device that stores power obtained by the first power generation device; and a movable power storage unit that stores power obtained by the first power generation device and power from the first fixed power storage device, wherein the movable power storage unit has an input terminal and an output terminal for connection to an external electrical device, or has a dual-purpose terminal that is used as the input terminal and also as the output terminal, the movable power storage unit has wheels for the movable power storage device, and the movable power storage unit has a conversion unit that includes at least one of an AC / DC converter used at least during charging and a DC / AC inverter used at least during discharging, the power supply system being provided in a housing that houses the fixed power storage unit, and wherein power is supplied to the movable power storage unit via a terminal electrically connected to the first fixed power storage device and the input terminal.

2. The power supply system of claim 1, wherein the first power generation device has a light-receiving panel which is a solar panel that receives sunlight, an angle adjustment unit that adjusts the angle of the light-receiving surface of the light-receiving panel, and a height adjustment unit that adjusts the height of the light-receiving panel, and the light-receiving panel is held in a high position when in use and is held in a low position when not in use.

3. The power supply system according to claim 2, wherein the power generation unit has a wind power generation device, and the height adjustment unit adjusts the height of the wind power generation device.

4. A power supply system as described in claim 2 or claim 3, wherein the first power generation device has a plurality of light-receiving panels and a connection portion that connects the plurality of light-receiving panels, and each of the plurality of light-receiving panels has a light-receiving surface on both the front and back sides.

5. The power supply system according to claim 1, wherein the housing is a vehicle housing, the housing is provided with a plurality of the terminals and is capable of accommodating a plurality of the movable power storage units, and power supply to the movable power storage units connected via the terminals and the input terminal is turned on and off based on a charging state.

6. The power supply system according to claim 1, wherein the housing is fixed to the ground or a building, and power is supplied from at least the fixed power storage unit to an external electrical device.

7. The power supply system according to claim 5, wherein power is supplied from the movable power storage unit to the external electrical device via the terminal and the output terminal.

8. The power supply system according to claim 1, wherein the housing is a housing for an electric vehicle, and the electric vehicle is a funeral vehicle including a funeral hall in which an altar and a coffin are placed, or a medical vehicle including medical examination equipment.

9. The power supply system according to claim 1, wherein the input terminal and the output terminal are configured as separate components, and the input terminal is provided at a higher position than the output terminal.

10. The power supply system according to claim 9, wherein the housing is a housing of an electric vehicle, the electric vehicle has a tailgate lifting device, and a stopper is provided in an area of ​​the tailgate lifting device that comes into contact with a wheel for the movable power storage device to hold the movable power storage unit in a state where the movable power storage unit cannot move horizontally, and the tailgate lifting device holds the movable power storage unit such that the input terminal is connected to the terminal when the movable power storage unit is lifted and stored in the housing.

11. The power supply system according to claim 9, wherein a carriage separate from the housing is provided, the movable power storage unit is placed on the carriage, and when the movable power storage unit is placed on the carriage, the input terminal and the terminal are positioned at the same height.

12. The power supply system of claim 9, wherein a carriage separate from the housing is provided, the carriage holds the movable power storage unit so that the input terminal is connected to the terminal when stored in the housing, the wheel of the carriage facing the housing is a retractable wheel, before the carriage is stored in the housing, the retractable wheel functions as the front wheel of the carriage, and when the carriage is stored in the housing, the retractable wheel is folded.

13. The power supply system according to claim 1, wherein the movable storage unit has the dual-purpose terminal, and the dual-purpose terminal is configured with a positive connector and a negative connector that are separate components.

14. The power supply system according to claim 13, wherein at least a portion of the electric wire connecting the storage device of the movable storage unit and the dual-purpose terminal is made of an elastic material, and the dual-purpose terminal is movably attached to the case of the movable storage unit.

15. The power supply system according to claim 1, wherein the movable power storage unit includes a plurality of power storage devices, the input terminal and the plurality of power storage devices are connected in parallel, and the output terminal and the plurality of power storage devices are connected in parallel.

16. The power supply system according to claim 15, wherein the movable power storage unit includes a control device and a switch, and the control device controls the switch so that the charging of each of the plurality of power storage devices is performed at different times.

17. The power supply system according to claim 15, wherein the movable power storage unit includes a holder that detachably holds each of the plurality of power storage devices.

18. The power supply system according to claim 15, wherein the movable power storage unit includes at least one of an information transmitting unit that transmits information relating to the charging rates of at least the plurality of power storage devices, and a display device that displays information relating to the charging rates of at least the plurality of power storage devices.

19. The power supply system of claim 1, wherein the movable storage unit includes a plurality of storage devices and a switching unit, the input terminal and the plurality of storage devices are connected in series, the output terminal and the plurality of storage devices are connected in parallel, and the switching unit switches between the electrical connection between the input terminal and the plurality of storage devices and the electrical connection between the output terminal and the plurality of storage devices.

20. The power supply system of claim 1, wherein the fixed storage unit has the first fixed storage device, a second storage device, and a third storage device, the first fixed storage device stores power from at least the first power generation device of the power generation unit that is located away from the housing, the second fixed storage device stores power from the second power generation device of the power generation unit that is attached to the housing or located away from the housing, the third fixed storage device is used to drive the motor of the electric vehicle, the power stored in the first fixed storage device is stored in the third fixed storage device via a rapid charger, a rapid charging cable, and a rapid charging terminal electrically connected to the third fixed storage device, and the power stored in the second fixed storage device is stored in the third fixed storage device via a normal charger, a normal charging cable, and a normal charging input terminal electrically connected to the third fixed storage device.

21. The power supply system according to claim 1, wherein the fixed power storage unit has the first fixed power storage device and a third power storage device, the first fixed power storage device stores power from at least the first power generation device of the power generation unit that is arranged away from the housing, the third fixed power storage device is used to drive a motor of the electric vehicle, and the power stored in the first fixed power storage device is stored in the third fixed power storage device via a quick charger, a quick charging cable, and a quick charging terminal electrically connected to the third fixed power storage device.

22. The power supply system according to claim 20 or 21, wherein the power stored in the third fixed power storage device is supplied to the external electrical device via the rapid charging terminal and a power supply cable.

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