Power Systems and Power Supply Units

Abstract

To provide a power source system and a power source unit that ensure mobility and furthermore include power storage devices in which a large capacity of power can be stored.SOLUTION: A power source system 500 comprising a power source unit 2001 and a power source unit 2002 is provided, the power source unit 2001 includes a power generation device 151 that generates power, and a battery 161 that stores the power generated by the power generation device 151, the power source unit 2002 includes a power generation device 152 that generates power and a battery 162 that stores the power generated by the power generation device 152, the battery 161 and the battery 162 are connected to each other in such a manner that the power stored in the battery 161 can be supplied to the battery 162, and the battery 161 and the battery 162 can be attached to and detached from each other.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a power supply system and a power supply unit. [Background technology]

[0002] For example, Japanese Patent No. 4840030 (Patent Document 1) discloses a power supply system including a power generation device that generates electric power and a power storage device that stores the electric power generated by the power generation device. The power generation device is, for example, a wind power generation device or a solar power generation device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4840030 Summary of the Invention [Problem to be solved by the invention]

[0004] There are cases where the storage capacity of the power storage device of the power supply system described in Patent Document 1 is increased. In this case, the size of the power storage device needs to be increased. Also, there are cases where a user wants to remove the power storage device with stored power from the power supply system and transport the power storage device. Here, when the size is large, Electricity storage The device is difficult for the user to transport, i.e. Electricity storage This can cause problems in that the mobility of the device is impaired.

[0005] The present invention has been made to solve the above-mentioned problems, and aims to provide a power supply system and a power supply unit that include a power storage device that can store a large amount of power while ensuring mobility. [Means for solving the problem]

[0006] According to an aspect of the present disclosure, a power supply system includes a first power supply unit and a second power supply unit. The first power supply unit has a first acquisition device that acquires power and a first power storage device that stores the power acquired by the first acquisition device. The second power supply unit has a second acquisition device that acquires power and a second power storage device that stores the power acquired by the second acquisition device. The first power storage device and the second power storage device are connected so that the power stored in the first storage device can be supplied to the second storage device and so that the first storage device and the second storage device are detachably connected.

[0007] According to another aspect of the present disclosure, the power supply unit includes an acquisition device that acquires power. , take The power storage device is connected to the power storage device of the other power supply unit so that the power stored in the power storage device can be supplied to the power storage device of the other power supply unit and the power storage device and the power storage device of the other power supply unit can be detachably connected to each other. [Effects of the Invention]

[0008] According to the present invention, in the power supply system, the power stored in the first power storage device of the first power supply unit can be supplied to the second power storage device. Therefore, the power acquired by the first acquisition device can be stored in the first power storage device and the second power storage device, allowing a large amount of power to be stored. Furthermore, because the first power storage device and the second power storage device are detachable, a user can separate the first power storage device from the second power storage device and transport the first power storage device or the second power storage device. Therefore, mobility of the first power storage device and the second power storage device can be ensured.

[0009] Furthermore, the power supply unit can supply the power stored in the power storage device of the power supply unit to the power storage devices of other power supply units. Therefore, the power acquired by the acquisition device can be stored in the power storage device and the power storage devices of other power supply units, allowing a large amount of power to be stored. Furthermore, since the power storage device and the power storage devices of other power supply units are detachable, a user can detach the power storage device from the power storage device of the other power supply unit and transport the power storage device or the power storage device of the other power supply unit. Therefore, the mobility of the power storage device can be ensured. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram illustrating an example of the configuration of a power supply system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram illustrating an example of a hardware configuration of a control device. [Figure 3] FIG. 2 illustrates an example of the configuration of a processing device. [Figure 4] FIG. 1 is a diagram illustrating an example of the configuration of a DC-DC converter. [Figure 5] 1 is an example of a display screen of a display device. [Figure 6] FIG. 1 is a diagram illustrating an example of the configuration of a power supply system of a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described with reference to the accompanying drawings, in which the same or corresponding components are designated by the same reference numerals and will not be described repeatedly.

[0012] [Power supply system configuration] Fig. 1 is a diagram showing an example of the configuration of a power supply system 500 of this embodiment. The power supply system 500 includes N (N is an integer of 2 or more) power supply units, N-1 processing devices, and a control device 300 that controls the N-1 processing devices. In the example of Fig. 1, nine power supply units 2001, 2002, ..., 2008, 2009 are shown (i.e., N=9).

[0013] The power supply unit 2001 includes a power generation device 151 and a battery 161. The power generation device 151 includes a wind turbine 101, a main shaft 111, a generator 121, and a power control unit 141. The wind turbine 101 rotates using the kinetic energy of wind. The main shaft 111 rotates as the wind turbine 101 rotates. The generator 121 converts the rotation of the main shaft 111 into electricity. The generator 121 is typically a three-phase synchronous generator using permanent magnets and is fastened to the main shaft 111 by a coupling or the like. A step-up gear may be provided between the main shaft 111 and the generator 121 as necessary. The power control unit 141 stores power in the battery 161 by converting power generated by the generator 121 so that the power can be supplied to the battery 161. A load circuit may be provided in parallel with the battery 161, allowing power to be supplied to the load in accordance with the stored power. In supplying power to a load, the battery can be used as an AC power source by providing an inverter or the like as needed.

[0014] The other power supply units 2002 to 2009 also include power generation devices 152 to 159 and batteries 162 to 169, respectively. The power generation devices 152 to 159 include wind turbines 102 to 109, main shafts 112 to 119, generators 122 to 129, and power control units 142 to 149, respectively.

[0015] Two batteries corresponding to each other are detachably connected to the processing device. In the example of FIG. 1, a battery 161 of a power supply unit 2001 and a battery 162 (a battery corresponding to the battery 161) of a power supply unit 2002 are detachably connected to the processing device 201. The battery 161 is connected to the processing device 201 via a connection terminal 201A, and the battery 162 is connected to the processing device 201 via a connection terminal 201B. The battery 161 can supply the power stored in the battery 161 to the battery 162 (the battery corresponding to the battery 161). The processing device 201 controls the power supplied from the battery 161 to the battery corresponding to the battery 161. Under the control of the processing device 201, the average power value supplied from the battery 161 to the battery 162 per unit time becomes a predetermined power value A1. The battery 162 can supply the power stored in the battery 162 to the battery 161 (the battery corresponding to the battery 162). The processing device 201 controls the power supplied from the battery 162 to the battery 161. The average power value supplied per unit time from the battery 162 to the battery 161 under the control of the processing device 201 becomes a predetermined power value A2.

[0016] 1, other batteries (for example, battery 168 of power supply unit 2008 and battery 169 of power supply unit 2009) are detachably connected to processing device 208. Battery 168 is connected to processing device 208 via connection terminal 208A, and battery 169 is connected to processing device 208 via connection terminal 208B. Battery 168 can supply the power stored in battery 168 to battery 169. Processing device 208The processing device 208 controls the power supplied from the battery 168 to the battery 169. The average power value supplied from the battery 168 to the battery 169 per unit time under the control of the processing device 208 becomes the predetermined power value A8. Furthermore, the battery 169 can supply the power stored in the battery 169 to the battery 168. The processing device 208 controls the power supplied from the battery 169 to the battery 168. The average power value supplied from the battery 169 to the battery 168 per unit time under the control of the processing device 208 becomes the predetermined power value A9.

[0017] Furthermore, the predetermined power values ​​A1, A2, A8, A9, and the predetermined power values ​​between other batteries may be the same or different. The control device 300 may be able to change these predetermined power values, or these predetermined power values ​​may be fixed values. The control device 300 may also control each processing device to control the amount of power stored in each battery (see FIG. 5).

[0018] Furthermore, the power supply unit 2001 of this embodiment is unit The power supply unit 2002 of the present disclosure corresponds to the "second power supply" of the present disclosure. unit " or "Other power sources unit " The power generation device 151 of the present disclosure corresponds to the "first acquisition device." The battery 161 of the present disclosure corresponds to the "first power storage device." The power generation device 152 of the present disclosure corresponds to the "second acquisition device." The battery 162 of the present disclosure corresponds to the "second power storage device."

[0019] The power generation device may be any other device that can acquire power. For example, the acquisition device may be a device that generates power using a water turbine or a device that generates power using sunlight. The acquisition device may also be a system power source that receives power from another power distribution network.

[0020] 2 is a diagram showing an example of the hardware configuration of the control device 300. The control device 300 has, as its main components, a central processing unit (CPU) 360, a read-only memory (ROM) 362, a random access memory (RAM) 364, a hard disk drive (HDD) 366, a communication interface (I / F) 368, a display I / F 370, and an input I / F 372. The components are interconnected by a data bus.

[0021] The communication I / F 368 is an interface for communicating with the processing devices 201 to 208. The display I / F 370 is an interface for communicating with the display device 26. The input I / F 372 is an interface for communicating with the input device 28. Note that the display device 26 and the input device 28 are omitted in FIG. 1.

[0022] The ROM 362 stores programs executed by the CPU 360. The RAM 364 can temporarily store data generated by the execution of the programs in the CPU 360 and data input via the communication I / F 368. The RAM 364 can function as a temporary data memory used as a work area. The HDD 366 is a non-volatile storage device. Alternatively, a semiconductor storage device such as a flash memory may be used instead of the HDD 366.

[0023] The program stored in ROM 362 may be stored in a storage medium and distributed as a program product. Alternatively, the program may be provided by an information provider as a so-called downloadable program product via the Internet or the like. The control device 300 reads the program provided from a storage medium or the Internet or the like. The control device 300 stores the read program in a predetermined storage area (for example, ROM 362). The CPU 360 executes the stored program to perform the above-mentioned display process.

[0024] The storage medium is not limited to DVD-ROM (Digital Versatile Disk Read Only Memory), CD-ROM (Compact Disc Read-Only Memory), FD (Flexible Disk), and hard disk, but may also be a medium that permanently carries a program, such as magnetic tape, cassette tape, optical disk (MO (Magnetic Optical Disc) / MD (Mini Disc) / DVD (Digital Versatile Disc), optical card, mask ROM, EPROM (Electronically Programmable Read-Only Memory), EEPROM (Electronically Erasable Programmable Read-Only Memory), flash ROM, or other semiconductor memory. The recording medium is also a non-transitory medium that can read programs, etc., by a computer.

[0025] 3 is a diagram showing an example of the configuration of the processing device 201. The processing device 201 includes a first processing device 2051 and a second processing device 2052. The first processing device 2051 includes a DC (Direct Current) DC converter 2011 and a diode 2021. The second processing device 2052 includes a DC DC The processing device 201 includes a converter 2012 and a diode 2022. The processing device 201 is also connected to a battery 161 and a battery 162. The battery 161 includes an electromotive force unit 2031 and an internal resistance 2041. The battery 162 includes an electromotive force unit 2032 and an internal resistance 2042.

[0026] The DC-DC converter 2011 limits the power flowing from the battery 161 to the battery 162 so that the average power value supplied per unit time from the battery 161 to the battery 162 becomes a predetermined power value A1. Furthermore, the diode 2021 supplies the power from the DC-DC converter 2011 to the battery 162. The diode 2021 can prevent the power from the battery 162 from flowing back to the battery 161.

[0027] The DC-DC converter 2012 controls the battery 162 so that the average power value supplied from the battery 162 to the battery 161 per unit time becomes a predetermined power value A2. 162 From the battery 161 The diode 2022 limits the power flowing to the battery 162. The diode 2022 also supplies power from the DC-DC converter 2012 to the battery 161. The diode 2022 can prevent power from the battery 161 from flowing back to the battery 162.

[0028] Other processing devices (such as processing device 208) Figure 3 This is the same as the configuration described above.

[0029] Fig. 4 is a diagram showing an example of the configuration of a DC-DC converter 2011. In the example of Fig. 4, the configuration of an isolated forward type DC-DC converter is shown. The DC-DC converter 2011 shown in Fig. 4 has an FET (Field Effect Transistor) 2024, a diode 2028, a coil 2030, a diode 2033, a capacitor 2034, and a transformer 2026. The DC-DC converter 2011 also has an input terminal IN1 to which an input voltage is applied, an input terminal IN2 to which a fixed voltage is applied, an output terminal OUT1, and an output terminal OUT2.

[0030] A primary coil and a secondary coil are disposed at the center of the transformer 2026. A common core is provided for the primary coil and the secondary coil. The FET 2024 controls the connection between the input terminal IN2 and one terminal of the primary coil of the transformer 2026. Specifically, a first terminal of the FET 2024 is connected to the input terminal IN2, and a second terminal of the FET 2024 is connected to one terminal of the primary coil of the transformer 2026. The other terminal of the primary coil of the transformer 2026 is connected to the input terminal IN1.

[0031] Furthermore, the secondary coil of the transformer 2026 has one of a pair of terminals connected to the anode of a diode 2028, and the other terminal connected to the output terminal OUT2. The cathode of the diode 2028 is connected to the cathode of a diode 2033 and one terminal of a coil 2030. The anode of the diode 2033 is connected to the output terminal OUT2. The other terminal of the coil 2030 is connected to the output terminal OUT1. The capacitor 2034 has one of a pair of electrodes connected to the output terminal OUT1, and the other electrode connected to the output terminal OUT2.

[0032] In addition, a limiting signal output from the control device 300 is input to the FET 2024. This limiting signal is a signal for limiting the current and voltage from the battery 161 to the battery 162. For example, this limiting signal is a signal for turning on the FET 2024. When this limiting signal is input to the FET 2024, the FET 2024 is in an on state, and when this limiting signal is not input to the FET 2024, the FET 2024 is in an off state. The control device 300 controls the duty ratio for turning on the FET 2024, thereby setting the average power value supplied per unit time from the battery 161 to the battery 162 to a predetermined power value A1. Note that the other DC-DC converters have the same configuration as that shown in FIG. 4.

[0033] 5 is an example of a display screen of the display device 26 (see FIG. 2) included in the control device 300. This screen is displayed in the display area 26A of the display device 26. On this display screen, information 262 and information 264 are displayed. The information 262 is information indicating the total amount of power stored in the batteries 161 to 169. The information 264 is information that allows a user (for example, an administrator of the power supply system 500) to input the amount of power to be stored in each of the batteries 161 to 169. The information 264 includes an input area (a rectangular area in the example of FIG. 5) for inputting the amount of power to be stored in each of the batteries 161 to 169.

[0034] By visually checking information 262, the user can recognize the total amount of power of batteries 161 to 169. The user also inputs the amount of power to be stored in each of batteries 161 to 169 using input device 28 in the input area corresponding to that battery. For example, the amount of power input in the input area corresponding to battery 162 is stored in battery 162. For example, power is supplied from battery 161 to battery 162 so that the amount of power of battery 162 becomes the input amount of power. In other words, display device 26 and input device 28 of control device 300 receive an input of the amount of power to be supplied from battery 161 to battery 162 from the user. Then, control device 300 controls each processing device, so that battery 161 supplies the input amount of power to battery 162.

[0035] 6 is a diagram showing an example of the configuration of a power supply system of a comparative example. In the example of FIG. 6, a power generation device 151A that generates power and a power supply unit 152 that supplies the power generated by the power generation device 151A are provided. store The present invention discloses a power supply system including a battery 161A. The power storage capacity of the battery 161A of this power supply system may be increased. In this case, the size of the battery 161A increases. In addition, there are cases where a user wants to remove the battery 161A that stores power from the power supply system and transport the battery 161A. Here, a large-sized battery 161A is difficult for the user to transport, that is, Electricity storage This can cause problems in that the mobility of the device is impaired.

[0036] In contrast, in the power supply system 500 of the present disclosure, the battery 161 of the power supply unit 2001 can supply the stored power to the battery 162. Therefore, the power acquired by the power generation device 151 can be stored in the batteries 161 and 162, which allows each battery (such as the batteries 161 and 162) to be miniaturized and to store a large amount of power. Furthermore, the battery 162 of the power supply unit 2002 can supply the stored power to the battery 161. Therefore, the power acquired by the power generation device 152 can be stored in the batteries 161 and 162, which allows each battery (such as the batteries 161 and 162) to be miniaturized and to store a large amount of power. Furthermore, the batteries 161 and 162 are detachable, which allows the user to separate the miniaturized battery 161 from the battery 162 and transport the miniaturized battery 161 or the battery 162. Therefore, the mobility of the batteries 161 and 162 can be ensured. Additionally, the user may transport two or more batteries separately.

[0037] Furthermore, if the amount of power stored in battery 161 is significantly greater than the amount of power stored in battery 162, power may suddenly flow from battery 161 to battery 162, resulting in a malfunction of the batteries. Furthermore, if the amount of power stored in battery 162 is significantly greater than the amount of power stored in battery 161, power may suddenly flow from battery 162 to battery 161, resulting in a malfunction of the batteries. Therefore, this embodiment is provided with processing device 201. Processing device 201 controls the average amount of power supplied per unit time from battery 161 to battery 162, and controls the average amount of power supplied per unit time from battery 162 to battery 161. In other words, processing device 201 can limit the amount of power supplied from battery 161 to battery 162 and the amount of power supplied from battery 162 to battery 161. Therefore, it is possible to prevent a sudden flow of power from battery 162 to battery 161 and a sudden flow of power from battery 161 to battery 162. The average amount of power is, for example, a value obtained by dividing "the amount of power supplied from battery 161 to battery 162 in a predetermined period" by the predetermined period. Note that "the average amount of power supplied per unit time" may also be expressed as "the amount of power supplied per unit time." In other words, the processing device 201 may control the amount of power supplied from battery 161 to battery 162 per unit time, and may also control the amount of power supplied from battery 162 to battery 161 per unit time.

[0038] Moreover, the first processing device 2051 is configured by a DC-DC converter 2011, and the second processing device 2052 is configured by a DC-DC converter 2012. Therefore, the first processing device 2051 and the second processing device 2052 are configured using existing devices.

[0039] Furthermore, the user can determine the amount of power to be stored in batteries 161-169 using the display screen (see FIG. 5) displayed by display device 26. That is, control device 300 accepts input of the amount of power to be supplied from battery 161 to battery 162. Furthermore, battery 161 supplies the amount of power input to control device 300 to battery 162. Furthermore, battery 162 supplies the amount of power input to control device 300 to battery 161. In this way, the user can determine the amount of power to be stored in batteries 161-169, thereby improving user convenience.

[0040] It should be noted that power supply system 500 does not necessarily have to include control device 300 shown in Fig. 1. In this case, the above-mentioned predetermined power values ​​(predetermined power value A1, etc.) are fixed values.

[0041] Although the embodiments of the present invention have been described above, the above-described embodiments can be modified in various ways. Furthermore, the scope of the present invention is not limited to the above-described embodiments. The scope of the present invention is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0042] 26A display area, 28 input device, 101, 102, 109 wind turbine, 111, 112, 119 main shaft, 121, 122, 129 generator, 141, 142, 149 power control section, 151, 152, 159 power generating device, 161, 162, 168, 169 battery, 201, 208 processing device, 201A, 201B, 208A, 208B connection terminal, 300 control device, 362 ROM, 364 RAM, 500 power supply system, 2001, 2002, 2008, 2009 power supply unit, 2011, 2012 converter, 2021, 2022, 2028, 2033 diode, 2026 transformer, 2030 coil, 2031, 2032 Electromotive force section, 2034 capacitor, 2041, 2042 internal resistance, 2051 first processing device, 2052 second processing device.

Claims

1. A power supply system comprising a first power supply unit, a second power supply unit, and a first processing device, The first power supply unit a first acquisition device that acquires power; a first power storage device that stores the power acquired by the first acquisition device, The second power supply unit is a second acquisition device that acquires power; a second power storage device that stores the power acquired by the second acquisition device, the first processing device supplies the electric power stored in the first power storage device to the second power storage device; The first power storage device and the second power storage device are detachably connected to the first processing device.

2. The power supply system according to claim 1 , wherein the first processing device is configured by a DC-DC converter.

3. 3. The power supply system according to claim 1, wherein the first power storage device and the second power storage device are connected to each other so that electric power stored in the second power storage device can be supplied to the first power storage device.

4. The power supply system according to claim 3 , further comprising a second processing device that controls an amount of power supplied from the second power storage device to the first power storage device.

5. The power supply system according to claim 4 , wherein the second processing device is configured by a DC-DC converter.

6. a control device that receives an input of an amount of power to be supplied from the first power storage device to the second power storage device; 6. The power supply system according to claim 1, wherein the first power storage device supplies the second power storage device with an amount of electric power input to the control device.

Images