JP2024012370A - Power conversion systems, cable supports, and power converters - Google Patents

Abstract

To provide a power conversion system capable of starting the power converter in the event of a power failure of an electric power system.SOLUTION: A power conversion system 100 includes a power converter 1 and a cable support device 2. The power converter 1 is capable of adjusting DC power which is discharged from a storage battery 31 of a moving body 3. The cable support device 2 supports a cable C1. The cable C1 forms a power supply path between a storage battery 31 and a power converter 1. The power converter 1 has a main circuit 121 that adjusts DC power, and a control circuit 122 that controls the operation of the main circuit 121. The power conversion system 100 further includes an auxiliary power supply unit 24. The auxiliary power supply unit 24 is configured so as to, when the electric power system 4 loses power, supply a control power for activating the control circuit 122 from the cable support device 2 to the power converter 1.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD This disclosure generally relates to power conversion systems, cable supports, and power converters. More specifically, the present disclosure relates to a power conversion system for supplying power from a storage battery included in a moving body to a load, and a cable support and a power converter used in the power conversion system.

Patent Document 1 discloses a power conversion system to which an electric vehicle equipped with a storage battery is connected. This power conversion system includes a power conversion device (power converter) and a connector connected to the power conversion device via a cable. The power conversion device has a main circuit that converts power when charging and discharging a storage battery. The connector forms a power supply path between the power conversion device and the storage battery by being attached to the inlet of the electric vehicle.

JP2015-89220A

An object of the present disclosure is to provide a power conversion system, a cable support, and a power converter that can start the power converter during a power outage in the power system.

A power conversion system according to one aspect of the present disclosure includes a power converter and a cable supporter. The power converter is provided between a storage battery included in a mobile object and an electric power system, and is capable of adjusting DC power discharged from the storage battery. The cable support supports a cable. The cable is connected between the movable body and the power converter to form a power supply path between the storage battery and the power converter. The power converter includes a main circuit that adjusts the DC power and a control circuit that controls the operation of the main circuit. The power conversion system further includes an auxiliary power supply section. The auxiliary power supply section supplies control power for activating the control circuit from the cable supporter to the power converter when the power system experiences a power outage.

A cable supporter according to one aspect of the present disclosure is used in the above power conversion system.

A power converter according to one aspect of the present disclosure is used in the above power conversion system.

The present disclosure has the advantage that the power converter can be activated during a power outage in the power system.

FIG. 1 is a schematic diagram showing the overall configuration including a power conversion system according to an embodiment of the present disclosure. FIG. 2 is a schematic diagram showing the configuration of the power conversion system same as above. FIG. 3 is a schematic diagram showing an installation example of the power conversion system same as above. FIG. 4 is a schematic diagram showing the configuration of a cable support in the power conversion system of Modification 1. FIG. 5 is a schematic diagram showing the configuration of the second power conversion device in the power conversion system of Modification 2. FIG. 6 is a schematic diagram showing the configuration of a cable supporter in a power conversion system according to modification 3. FIG. 7 is a schematic diagram showing the configuration of a cable supporter in a power conversion system according to modification 4.

(1) Overview The power conversion system 100 of this embodiment is introduced, for example, into a residential facility such as a single-family house or an apartment complex, or a non-residential facility such as an office, store, or nursing care facility. The power conversion system 100 is a system for supplying (discharging) power from the storage battery 31 of the mobile body 3 at these facilities (see FIG. 1). In this embodiment, as an example, a case will be described in which the power conversion system 100 is introduced into a house H1 that is a detached house.

The moving body 3 includes a power section such as an electric motor (motor), and a storage battery 31 as a power source that supplies power to the power section. The movable body 3 converts electrical energy (electric power) input from the storage battery 31 into mechanical energy (driving force) in a power section, and moves using this mechanical energy. The mobile body 3 includes a power control circuit 32. The power control circuit 32 charges the storage battery 31 with charging power that does not exceed a predetermined maximum value.

The moving object 3 is a vehicle 30 here. The vehicle 30 is, for example, an electric vehicle that runs using electrical energy stored in a storage battery 31. The "electric vehicle" referred to in the present disclosure is, for example, an electric vehicle that runs on the output of an electric motor, or a plug-in hybrid vehicle that runs on a combination of the output of an engine and the output of an electric motor. The electric vehicle may be a senior car, a two-wheeled vehicle (electric motorcycle), a tricycle, an electric bicycle, or the like.

As shown in FIG. 1, the power conversion system 100 includes a first power conversion device 11, a second power conversion device 12, and a cable supporter 2. In the following description, the first power converter 11 and the second power converter 12 may be collectively referred to as "power converter 1." Furthermore, in the following description, the second power converter 12 may be referred to as the "power converter 1."

The first power converter 11 converts AC power input from the power system 4 into DC power and outputs the DC power to the DC bus DB1. That is, the first power converter 11 has the function of an AC/DC converter that converts input AC power into DC power of a predetermined magnitude and outputs the DC power.

The second power converter 12 converts the DC power input from the DC bus DB1 into charging power for the storage battery 31 of the mobile body 3 and outputs the charging power. That is, the second power converter 12 has the function of a DC/DC converter that converts input DC power into DC power of a predetermined magnitude and outputs the DC power.

In this embodiment, the first power converter 11 has a function of converting the DC power output from the second power converter 12 into AC power of a predetermined magnitude and outputting the AC power to the power grid 4. Furthermore, in this embodiment, the second power converter 12 has a function of converting the DC power discharged from the storage battery 31 into DC power of a predetermined magnitude and outputting the DC power to the first power converter 11. . That is, the power converter 1 is provided between the storage battery 31 of the mobile body 3 and the power system 4, and can adjust the DC power discharged from the storage battery 31.

Cable supporter 2 supports cable C1. The cable C1 is connected between the mobile body 3 and the second power converter 12, and forms a power supply path between the storage battery 31 and the second power converter 12. A connector CN1 is attached to the tip of the cable C1. The connector CN1 is configured to be connectable to the inlet 34 of the moving body 3. That is, the DC power (charging power) output from the second power converter 12 is supplied to the storage battery 31 via the cable C1 supported by the cable supporter 2 while the connector CN1 is connected to the inlet 34. will be done.

A "cable" as used in the present disclosure refers to a linear member in which one or more electric wires are protected by a sheath. Furthermore, the term "electric wire" as used in the present disclosure may include bare wires that are only electrical conductors, as well as insulated wires in which electrical conductors are coated with an insulator.

The cable C1 is supported by the cable supporter 2 in the present disclosure, for example, by the user U1 hooking the cable C1 so as not to obstruct the passage of the user U1 (see FIG. 3) when the connector CN1 is not in use. This does not mean only a mode that temporarily supports C1. In other words, supporting the cable C1 by the cable supporter 2 in the present disclosure also means permanently supporting the cable C1 without attachment or detachment by the user U1 in principle.

Here, the power converter 1 (here, the second power converter 12) includes a main circuit 121 that adjusts DC power, and a control circuit 122 that controls the operation of the main circuit 121. The power converter 1 starts when control power is supplied to the control circuit 122 and the control circuit 122 starts (in other words, the main circuit 121 starts operating). In this embodiment, the power conversion system 100 further includes an auxiliary power supply section 24. The auxiliary power supply section 24 supplies control power for starting the control circuit 122 from the cable supporter 2 to the power converter 1 when the power system 4 experiences a power outage. That is, when the power grid 4 experiences a power outage, the power supply from the power grid 4 to the power converter 1 is interrupted, and therefore the operation of the power converter 1 is stopped. In this embodiment, since control power can be supplied from the auxiliary power supply unit 24 to the control circuit 122, the control circuit 122 of the power converter 1 can be activated even during a power outage in the power system 4. In this way, the present embodiment has the advantage that the power converter 1 can be activated during a power outage in the power system 4.

(2) Details Hereinafter, the power conversion system 100 of this embodiment will be described in detail with reference to the drawings.

(2.1) Overall Configuration First, the overall configuration including the power conversion system 100 will be described with reference to FIG. 1. In this embodiment, the power conversion system 100 realizes the function of the power conversion system 100 by cooperating with the equipment control device 5 installed inside the house H1.

Power converter 1 and device control device 5 of power conversion system 100 are configured to be able to communicate with each other. In the present disclosure, "communicatable" means that information can be exchanged directly by an appropriate communication method such as wired communication or wireless communication, or indirectly via a network, a repeater, or the like. That is, the power converter 1 and the device control device 5 can exchange information with each other. In this embodiment, the power converter 1 and the device control device 5 are capable of bidirectional communication with each other, and the power converter 1 can transmit information to the device control device 5, and the device control device 5 can perform power conversion. Both transmission of information to device 1 is possible.

The device control device 5 is a device that controls at least the power converter 1. The device control device 5 outputs a charging start signal for instructing the power converter 1 to start charging and a charging stop signal for instructing the power converter 1 to stop charging, thereby controlling the movement by the power converter 1. Controls the start and stop of charging of the storage battery 31 of the body 3. Therefore, for example, when the user U1 performs a predetermined operation on the device control device 5, the power converter 1 is instructed to start charging the storage battery 31 or to stop charging the storage battery 31. Is possible.

In this embodiment, the device control device 5 is connected to a network such as the Internet via a router. Therefore, the device control device 5 can communicate with the information terminal owned by the user U1 via a router or a router and a network. The information terminal is, for example, a smartphone, a tablet terminal, a personal computer, or the like. Therefore, the user U1 can instruct to start charging the storage battery 31 or to stop charging the storage battery 31 not only by directly operating the equipment control device 5 but also by operating the information terminal. is possible.

The power converter 1 is a charging facility for charging the storage battery 31 of the mobile body 3. In this embodiment, the power converter 1 is installed inside the house H1. A cable C1 is connected to the power converter 1. The tip of the cable C1 has a connector CN1 that is removably connected to the inlet 34 of the moving body 3. Since the power converter 1 is connected to the mobile body 3 via the cable C1 with the connector CN1 connected to the inlet 34, power can be supplied to the storage battery 31 of the mobile body 3 via the cable C1. This makes it possible to charge the storage battery 31.

Further, in the present embodiment, the power converter 1 is also a discharging facility that has a function of discharging from the storage battery 31 of the mobile body 3 via the cable C1 while the connector CN1 is connected to the inlet 34. Therefore, in this embodiment, a V2H (Vehicle To Home) system can be constructed by outputting the discharged power of the storage battery 31 of the mobile body 3 to the load (including the distribution board) of the house H1.

The mobile body 3 includes a storage battery 31, a power control circuit 32, and an ECU (Electronic Control Unit) 33. The power control circuit 32 is a circuit that receives power from the power converter 1 and charges the storage battery 31 . In this embodiment, the power control circuit 32 has not only the function of charging the storage battery 31 but also the function of discharging the storage battery 31. The EUC 33 controls the power control circuit 32 based on a signal (here, a signal based on the CHAdeMO (registered trademark) standard as an example) transmitted via a communication line L2 (described later) of the cable C1.

(2.2) Power Conversion System Next, the power conversion system 100 will be described with reference to FIGS. 1 to 3. The power conversion system 100 includes a first power conversion device 11 and a second power conversion device 12 as a power converter 1, and a cable supporter 2.

The first power conversion device 11 includes a main circuit 111, a control circuit 112, and a communication section 113, as shown in FIG. Further, in the first power conversion device 11, the main circuit 111, the control circuit 112, and the communication section 113 are all housed in a rectangular parallelepiped-shaped housing 11A (see FIG. 3). In this embodiment, the housing 11A is installed in a house H1, as shown in FIG.

The main circuit 111 is a bidirectional AC/DC converter, and one end is connected to the power system 4, and the other end is connected to the main circuit of the second power converter 12 via a DC cable C2 that is a DC bus DB1. 121. The main circuit 111 has, for example, a plurality of switching elements connected in a full bridge manner, and the plurality of switching elements are controlled by PWM (Pulse Width Modulation) by the control circuit 112 to convert DC power to AC power or AC power. Converts electric power to DC power.

In this embodiment, the main circuit 111 has a function of converting AC power input from the power system 4 into DC power of a predetermined magnitude and outputting the DC power to the second power converter 12. Furthermore, in the present embodiment, the main circuit 111 has a function of converting the DC power output from the second power converter 12 into AC power of a predetermined magnitude and outputting the AC power to the power system 4. In other words, the first power converter 11 has a function of converting DC power input from the DC cable C2 (DC bus DB1) into AC power and outputting the AC power to the power system 4.

The control circuit 112 is configured, at least in part, by a microcontroller having one or more processors and memories. In other words, at least a part of the control circuit 112 is realized by a computer system having one or more processors and a memory, and the computer system is implemented by one or more processors executing a program stored in the memory. It functions as part of the control circuit 112. Although the program is pre-recorded in the memory of the control circuit 112 here, it may also be provided via a telecommunications line such as the Internet or recorded on a non-temporary recording medium such as a memory card. Further, the control circuit 112 includes a driver for driving the plurality of switching elements included in the main circuit 111. The control circuit 112 may be configured with, for example, an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit).

The control circuit 112 controls the main circuit 111 to start charging the storage battery 31 or stop charging the storage battery 31 by receiving a command from the equipment control device 5 or the information terminal via the communication unit 113. It has the function of In the present embodiment, the control circuit 112 controls the main circuit 111 to convert the DC power from the second power converter 12 into AC power during a power outage in the power system 4, for example, and converts the DC power from the second power converter 12 into AC power to It also has the function of outputting to a power supply (including a distribution board).

The communication unit 113 has a function of communicating with the device control device 5. As a communication method between the communication unit 113 and the device control device 5, an appropriate communication method such as wireless communication or wired communication is adopted. In this embodiment, as an example, the communication method between the communication unit 113 and the device control device 5 is wired communication based on a communication standard such as a wired LAN (Local Area Network). The communication protocol for communication between the communication unit 113 and the device control device 5 is, for example, Ethernet (registered trademark) or ECHONET Lite (registered trademark).

The communication unit 113 also has a function of communicating with a communication unit 123 (described later) of the second power conversion device 12. As a communication method between the communication unit 113 and the communication unit 123 of the second power conversion device 12, an appropriate communication method such as wireless communication or wired communication is adopted. In this embodiment, as an example, the communication unit 113 performs wired communication with the communication unit 123 of the second power conversion device 12 via the communication line L2 included in the DC cable C2.

The second power conversion device 12 includes a main circuit 121, a control circuit 122, and a communication section 123, as shown in FIG. Further, in the second power conversion device 12, the main circuit 121, the control circuit 122, and the communication section 123 are all housed in a rectangular parallelepiped-shaped housing 12A (see FIG. 3). In this embodiment, the housing 12A is installed in a house H1, as shown in FIG.

The main circuit 121 is a bidirectional DC/DC converter, and one end is connected to the first cable C11, and the other end is connected to the main circuit 111 of the first power converter 11 via the DC cable C2. ing. The main circuit 121 includes, for example, one or more switching elements, and the one or more switching elements are subjected to PWM control by the control circuit 122 to adjust and output the input DC power.

In the present embodiment, the main circuit 121 has a function of converting the DC power output from the first power conversion device 11 into DC power of a predetermined magnitude and outputting the DC power to the storage battery 31 via the first cable C11 and connector CN1. have. Further, in the present embodiment, the main circuit 121 converts the DC power discharged from the storage battery 31 via the first cable C11 and the connector CN1 into DC power of a predetermined magnitude, and outputs the DC power to the first power converter 11. It has the function of In other words, the second power converter 12 has a function of adjusting discharge power (DC power) discharged from the storage battery 31 and outputting the adjusted power to the DC bus DB1.

The control circuit 122 is at least partially composed of a microcontroller having one or more processors and memories. In other words, at least a part of the control circuit 122 is realized by a computer system having one or more processors and a memory, and the computer system is implemented by one or more processors executing a program stored in the memory. It functions as part of the control circuit 122. Although the program is pre-recorded in the memory of the control circuit 122 here, it may also be provided via a telecommunications line such as the Internet or recorded on a non-temporary recording medium such as a memory card. Further, the control circuit 122 has a driver for driving one or more switching elements included in the main circuit 121. The control circuit 122 may be configured with, for example, FPGA or ASIC.

The control circuit 122 controls the main circuit 121 and starts charging the storage battery 31 by receiving a command from the device control device 5 or the information terminal via the communication section 123 and the communication section 113 of the first power conversion device 11. It has a function of stopping charging of the storage battery 31. In this embodiment, the control circuit 122 controls the main circuit 121 to adjust the discharge power (DC power) from the storage battery 31 and output it to the first power converter 11, for example, during a power outage in the power system 4. It also has functions.

The communication unit 123 has a function of communicating with the communication unit 113 of the first power conversion device 11. As a communication method between the communication unit 123 and the communication unit 113 of the first power conversion device 11, an appropriate communication method such as wireless communication or wired communication is adopted. In this embodiment, as an example, the communication unit 123 performs wired communication with the communication unit 113 of the first power conversion device 11 via the communication line L2 included in the DC cable C2.

The communication unit 123 also has a function of communicating with the mobile object 3. As a communication method between the communication unit 123 and the mobile object 3, an appropriate communication method such as wireless communication or wired communication is adopted. In this embodiment, as an example, the communication unit 123 performs wired communication with the mobile body 3 via the communication line L2 included in the cable C1. In the present embodiment, as an example, the communication unit 123 communicates for checking the connection between the power converter 1 and the mobile body 3, checking the status of the mobile body 3, etc., using at least signals based on the CHAdeMO (registered trademark) standard. I do.

The cable supporter 2 supports a part of the cable C1, as shown in FIG. Further, in the cable supporter 2, a part of the cable C1 is supported by being housed in a rectangular parallelepiped-shaped housing 2A (see FIG. 3). In this embodiment, the housing 2A is installed outside the residence H1 in the parking space A1 of the mobile object 3, as shown in FIG. In other words, the cable support 2 is installed independently on the ground (here, the parking space A1).

In this embodiment, the cable C1 includes a first cable C11 and a second cable C12. The first cable C11 is connected between the moving body 3 and the cable support 2. In other words, the first cable C11 is a cable connected between the storage battery 31 and the cable supporter 2 and supplied with DC power. The second cable C12 is of a different type from the first cable C11, and is connected between the cable support 2 and the second power converter 12. In other words, the second cable C12 is a cable connected between the cable support 2 and the power converter 1 and supplied with DC power. That is, in the embodiment, the first cable C11 and the second cable C12 are of different types.

In this embodiment, basically, the first cable C11 and the second cable are It can be said that C12 are different in type from each other. Specifically, the first cable C11 and the second cable C12 can be said to be of different types since they have different diameters. Moreover, it can be said that the first cable C11 and the second cable C12 are of different types because the number of electric wires they include is different from each other. In addition, the first cable C11 and the second cable C12 can be said to be different types even if the cable structures, materials, or manufacturers are different from each other.

In this embodiment, the first cable C11 is, for example, a cabtire cable. Further, in this embodiment, the second cable C12 is, for example, a crosslinked polyethylene insulated vinyl sheath cable (CV cable). Further, in the present embodiment, the first cable C11 and the second cable C12 each include one or more (here, two) power lines L1 and one or more (here, multiple) communication lines L2. have. Furthermore, in this embodiment, the DC cable C2 is a CV cable like the second cable C12, and includes one or more power lines L1 and one or more communication lines L2.

The cable supporter 2 (power conversion system 100) further includes a connecting portion 20 that connects the first cable C11 and the second cable C12 to each other. In this embodiment, the connecting portion 20 is housed inside the housing 2A of the cable supporter 2. That is, the connecting portion 20 is provided inside the cable support 2.

In this embodiment, the connecting portion 20 includes a first terminal 21 to which the first cable C11 is connected, and a second terminal 22 to which the second cable C12 is connected. That is, in this embodiment, the first cable C11 is fixed (supported) to the cable supporter 2 by connecting its one end to the first terminal 21. Further, the second cable C12 is fixed (supported) to the cable supporter 2 by connecting one end thereof to the second terminal 22.

The first terminal 21 and the second terminal 22 are connected via an electric circuit 23. The electric circuit 23 connects, for example, one or more power lines L1 and one or more communication lines L2 of the first cable C11 to one or more power lines L1 and one or more communication lines L2 of the second cable C12. This is a conversion circuit that converts electrical connections. Of course, the electric circuit 23 connects one or more power lines L1 and one or more communication lines L2 of the first cable C11 with one or more power lines L1 and one or more communication lines L2 of the second cable C12. It may also be a simple electrical conductor.

In this embodiment, as shown in FIG. 3, a part of the cable C1 is wired underground between the cable supporter 2 and the first power converter 11. Similarly, a part of the DC cable C2 is wired underground between the first power converter 11 and the second power converter 12. Under the ground, the cable C1 is passed through a pipe C3 such as a metal conduit. The hardness of the pipe C3 is higher than the hardness of the sheath (outer skin) of the cable C1.

Moreover, the cable supporter 2 (power conversion system 100) further includes an auxiliary power supply section 24, as shown in FIGS. 1 and 2. In this embodiment, the auxiliary power supply section 24 has a power supply connection section 241. The power supply connection unit 241 is a power supply interface to which the external power supply 6 is connected. In other words, the power supply connection section 241 is connected to the external power supply 6 that outputs control power. Here, the external power supply 6 is a power supply located outside the power conversion system 100, and outputs control power for operating the control circuit 122 of the power converter 1 (here, the second power conversion device 12). . In this embodiment, the external power source 6 is, for example, a cigarette lighter socket provided in the moving object 3, a battery including a lead acid battery, or the like. The external power supply 6 can be connected to the power supply connection section 241 via, for example, a pair of power lines L4.

In this embodiment, the power supply connection unit 241 is connected to the control circuit 122 of the power converter 1 (here, the second power conversion device 12) via a pair of power supply lines L3 included in the second cable C12. . The auxiliary power supply unit 24 supplies control power from the external power supply 6 to the control circuit 122 via the pair of power supply lines L3 when the external power supply 6 is connected to the power supply connection unit 241. That is, in this embodiment, the power conversion system 100 further includes a power line L3 connected between the cable supporter 2 and the power converter 1 to which control power is supplied. The power line L3 is included in the second cable C12.

(3) Operation Hereinafter, an example of the operation of the power conversion system 100 when the power grid 4 experiences a power outage will be described. When the power grid 4 has a power outage, the power supply from the power grid 4 to the first power converter 11 and the second power converter 12 is interrupted. Therefore, the operations of the first power converter 11 and the second power converter 12 are stopped.

Here, when the user U1 attempts a blackout start using the storage battery 31, the user U1 connects the external power supply 6 to the power supply connection section 241. Thereby, the auxiliary power supply section 24 transfers the control power output from the external power supply 6 to the control circuit of the power converter 1 (here, the second power conversion device 12) via the power supply connection section 241 and the pair of power supply lines L3. 122. Then, the control circuit 122 is activated in response to the control power, thereby establishing communication between the communication unit 123 and the mobile body 3 via the communication line L2 of the cable C1. Thereby, the switch of the storage battery 31 can be closed, and DC power is supplied to the main circuit 121 of the second power conversion device 12 via the power line L1.

Then, by controlling the main circuit 121 by the control circuit 122, the second power conversion device 12 converts the DC power into DC power of a predetermined magnitude, and supplies the DC power to the DC bus DB1. Then, the control circuit 112 of the first power conversion device 11 is activated in response to the power supply from the DC bus DB1, and communication between the communication unit 113 and the communication unit 123 via the communication line L2 of the DC cable C2 is started. will be restored.

Here, when the DC power supplied to the DC bus DB1 becomes stable, the auxiliary power supply section 24 stops supplying the control power, for example, by controlling a relay provided in the control power supply path. In other words, the auxiliary power supply section 24 starts up the control circuit 122 and then stops supplying the control power. After the supply of control power from the auxiliary power supply unit 24 is stopped, the control circuit 122 operates by being supplied with control power from the DC bus DB1. Note that the control circuit 122 may operate by being supplied with control power from the cable C1.

Thereafter, by controlling the main circuit 111 by the control circuit 112, the first power converter 11 converts the DC power into AC power and outputs it to the load (including the distribution board) connected to the power system 4. do. Therefore, in this embodiment, even during a power outage in the power system 4, the discharged power of the storage battery 31 can be supplied to the load.

(4) Advantages As described above, in this embodiment, when the power system 4 has a power outage, the control circuit 122 of the power converter 1 (here, the second power converter 12) is activated from the auxiliary power supply unit 24. be able to. Therefore, in this embodiment, the power converter 1 can be activated even if the power system 4 experiences a power outage. Further, in this embodiment, the auxiliary power supply section 24 supplies control power from the cable supporter 2 to the power converter 1. That is, in this embodiment, when the power system 4 experiences a power outage, the user U1 does not have to go to the location where the power converter 1 is located, but instead goes to the location where the cable support 2 is located, in other words, the parking space A1 of the mobile object 3. There is also an advantage that the work using the auxiliary power supply section 24 can be completed by using the auxiliary power supply section 24.

(5) Modifications The embodiment described above is just one of various embodiments of the present disclosure. The embodiments described above can be modified in various ways depending on the design, etc., as long as the objective of the present disclosure can be achieved. Modifications of the above embodiment will be listed below. The modified examples described below can be applied in combination as appropriate.

(5.1) Modification example 1
The power conversion system 100 of Modification 1 differs from the power conversion system 100 of the above-described embodiment in that, as shown in FIG. 4, the pair of power lines L4 is included in the first cable C11. In this modification, the external power source 6 is a battery such as a lead-acid battery provided in the moving body 3. The external power supply 6 is connected to the power supply connection section 241 of the auxiliary power supply section 24 via a pair of power lines L4, with the connector CN1 connected to the inlet 34.

Therefore, in this modification, by simply connecting the connector CN1 to the inlet 34, the external power supply 6 is connected to the control circuit 122 of the power converter 1 (here, the second power converter 12) via the power supply connection part 241. It is possible to form a power supply path. Therefore, in this modification, there is no need for the user U1 to wire the power supply connection section 241 using a separate power line, and there is an advantage that convenience for the user U1 is improved.

(5.2) Modification 2
As shown in FIG. 5, the power conversion system 100 of Modification 2 differs from the power converter 1 (here, the second power conversion device 12) in that it further includes a power supply circuit 124. This is different from the conversion system 100. The power supply circuit 124 is a step-down DC/DC converter that steps down the voltage applied from the auxiliary power supply section 24 and outputs the stepped-down voltage to the control circuit 122 as a control voltage. In other words, the power supply circuit 124 receives the voltage applied from the auxiliary power supply section 24 and generates the voltage to be applied to the control circuit 122. The voltage applied from the auxiliary power supply section 24 to the power supply circuit 124 is higher than the voltage generated by the power supply circuit 124.

Therefore, in this modification, it is possible to apply a stable voltage to the control circuit 122 by the power supply circuit 124, compared to the case where the voltage is directly applied to the control circuit 122 from the auxiliary power supply section 24. In addition, in this modification, when a line resistance limit is imposed on the power line L4 for reasons of line safety, an auxiliary power supply section 24, which serves as the line end point of the power line L4, is provided in the cable supporter 2, which is close to the moving body 3. have. Therefore, in this modification, the distance of the power line L4 can be shortened, and the line resistance of the power line L4 can be suppressed within limits. In this way, in this modification, compared to the case where control power is directly supplied to the control circuit 122 from the auxiliary power supply unit 24, the power supply circuit 124 supplies stable control power to the control circuit 122, and It is possible to ensure security.

(5.3) Modification 3
The power conversion system 100 of the third modification is different from the power conversion system 100 of the first modification in that the auxiliary power supply unit 24 includes an auxiliary power supply circuit 242, as shown in FIG. The power conversion system 100 of the third modification is also different from the power conversion system 100 of the first modification in that the cable support 2 includes a processing section 25.

The auxiliary power supply circuit 242 is, for example, a step-up DC/DC converter, and converts the DC power supplied from the external power supply 6 via the pair of power lines L4 of the first cable C11 into DC power of a predetermined size. and output it. The DC power output from the auxiliary power supply circuit 242 is supplied as control power to the control circuit 122 of the power converter 1 (here, the second power converter 12) via the pair of power lines L3 of the second cable C12. be done. That is, the auxiliary power supply circuit 242 generates control power by receiving DC power supplied from a path (a pair of power lines L4) that is different from the storage battery 31 in the first cable C11. Further, the DC power output from the auxiliary power supply circuit 242 is supplied to the processing section 25 as operating power for the processing section 25. That is, the auxiliary power supply unit 24 supplies operating power to the processing unit 25.

The processing unit 25 is at least partially composed of a microcontroller having one or more processors and memory. In other words, the processing unit 25 is realized by a computer system having one or more processors and a memory, and when the one or more processors execute a program stored in the memory, the processing unit 25 is realized by the computer system. function as part of Although the program is pre-recorded in the memory of the processing unit 25 here, it may also be provided via a telecommunications line such as the Internet or recorded on a non-temporary recording medium such as a memory card.

The processing unit 25 obtains control parameters for the main circuit 121 by processing communication with the mobile body 3. Examples of the control parameters include an upper limit value of charging current, an upper limit value of discharging current, a command to permit/prohibit charging or discharging the storage battery 31, a command to request an abnormal stop from the mobile object 3, or a command to stop due to overcharging. etc. may be included. The processing unit 25 transmits the control parameters to the control circuit 122 of the power converter 1 (here, the second power converter 12) via the communication line L2 of the second cable C12.

When the control circuit 122 receives the control parameters from the processing unit 25 through the communication unit 123, it controls the main circuit 121 based on the received control parameters. That is, the control circuit 122 controls the main circuit 121 based on the control parameters acquired from the processing section 25 by communicating with the processing section 25 .

Therefore, in this modification, there is no need for the user U1 to wire the power supply connection unit 241 using a separate power line, and there is an advantage that convenience for the user U1 is improved. Furthermore, in this modification, if the auxiliary power supply circuit 242 boosts the input voltage and outputs it, for example, it is possible to compensate for the voltage drop in the cable C1 by boosting the voltage in the auxiliary power supply circuit 242. Therefore, in this modification, compared to the case without the auxiliary power supply circuit 242, it is possible to make the cable C1 longer while ensuring a sufficient supply path for the control power to the control circuit 122. There are also advantages.

Moreover, this modification has the advantage that the number of communication lines L2 wired between the cable supporter 2 and the power converter 1 can be reduced compared to the case where the processing unit 25 is not included. be. That is, communication between the mobile body 3 and the power converter 1 requires one or more communication lines L2 based on the communication standard with the mobile body 3 (in this case, the CHAdeMO (registered trademark) standard). Here, in this modification, it is possible to complete communication using the plurality of communication lines L2 with communication between the mobile body 3 and the processing unit 25. Therefore, in this modification, in communication between the processing unit 25 and the power converter 1, one or more communication lines L2 based on the communication standard with the mobile body 3 are not required, so the cable support 2 and the power It is possible to reduce the number of communication lines L2 wired between the converter 1 and the converter 1.

(5.4) Modification 4
As shown in FIG. 7, the power conversion system 100 of Modification 4 differs from the power conversion system 100 of the above-described embodiment in that it includes a presentation unit 26. The presenting unit 26 presents the completion of activation of the control circuit 122. Specifically, when control power is supplied to the control circuit 122 and the control circuit 122 is activated, the presentation unit 26 causes a solid-state light emitting element such as an LED (Light Emitting Diode) to emit light in a predetermined color. The user U1 is informed that the control circuit 122 has been activated. In addition, the presenting unit 26 may present to the user U1 that the control circuit 122 has been activated, for example by making a predetermined sound sound from a buzzer or a speaker.

Therefore, this modification has the advantage that the user U1 can easily understand that the activation of the control circuit 122 has been completed, in other words, that the blackout start using the storage battery 31 has been successful.

(5.5) Other Modifications The power conversion system 100 according to the present disclosure includes, for example, a computer system in the processing unit 25. A computer system mainly consists of a processor and a memory as hardware. The function of the processing unit 25 in the present disclosure is realized by the processor executing a program recorded in the memory of the computer system. The program may be pre-recorded in the memory of the computer system, may be provided through a telecommunications line, or may be recorded on a non-transitory storage medium readable by the computer system, such as a memory card, optical disc, hard disk drive, etc. may be provided. A processor in a computer system is comprised of one or more electronic circuits including semiconductor integrated circuits (ICs) or large scale integrated circuits (LSIs). The integrated circuits such as IC or LSI referred to herein have different names depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, an FPGA (Field-Programmable Gate Array), which is programmed after the LSI is manufactured, or a logic device that can reconfigure the connections inside the LSI or reconfigure the circuit sections inside the LSI, may also be used as a processor. Can be done. The plurality of electronic circuits may be integrated into one chip, or may be provided in a distributed manner over a plurality of chips. A plurality of chips may be integrated into one device, or may be distributed and provided in a plurality of devices. The computer system herein includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits including semiconductor integrated circuits or large-scale integrated circuits.

Furthermore, it is not an essential configuration for the processing section 25 that a plurality of functions in the processing section 25 are integrated into one housing. The components of the processing unit 25 may be distributed and provided in a plurality of housings. Furthermore, at least some of the functions of the processing unit 25 may be realized by, for example, a server device, a cloud (cloud computing), or the like. On the contrary, all the functions of the processing section 25 may be integrated into one housing as in the third modification described above.

In the embodiments described above, the external power source 6 may be a small generator that outputs AC power. In this case, the auxiliary power supply unit 24 may have a configuration that converts AC power input from a small generator into DC power and outputs the DC power.

In the embodiment described above, the first cable C11 and the second cable C12 do not have to be of different types. For example, the first cable C11 and the second cable C12 may be the same type of cable and may be connected at the connecting portion 20.

In the embodiment described above, the power conversion system 100 (cable support 2) does not need to include the connection part 20. That is, the cable supporter 2 may be configured to support one cable C1 that connects the movable body 3 and the second power conversion device 12 together.

In the embodiment described above, the cable support 2 may be provided with an operation section for instructing to start and stop charging the storage battery 31. In this case, the user U1 can instruct the start and stop of charging the storage battery 31 by operating the operating section without directly operating the device control device 5. Furthermore, the operating section may be provided not on the cable supporter 2 but on the connector CN1.

In the embodiment described above, the first power converter 11 and the second power converter 12 do not need to be configured separately from each other. That is, the first power converter 11 and the second power converter 12 may be housed in one housing as the power converter 1.

In the embodiment described above, the power converter 1 does not need to include the first power converter device 11. That is, the first power conversion device 11 does not need to be included in the components of the power conversion system 100.

In the embodiments described above, the cable support 2 can be marketed alone. That is, the cable supporter 2 is used in the power conversion system 100. Similarly, the power converter 1 can be sold alone on the market. That is, power converter 1 is used in power conversion system 100.

(summary)
As described above, the power conversion system (100) according to the first aspect includes the power converter (1) (here, the second power conversion device (12)) and the cable supporter (2). Be prepared. The power converter (1) is provided between a storage battery (31) included in a mobile object (3) and an electric power system (4), and can adjust DC power discharged from the storage battery (31). The cable supporter (2) supports the cable (C1). The cable (C1) is connected between the moving body (3) and the power converter (1) to form a power supply path between the storage battery (31) and the power converter (1). The power converter (1) includes a main circuit (121) that adjusts DC power and a control circuit (122) that controls the operation of the main circuit (121). The power conversion system (100) further includes an auxiliary power supply section (24). The auxiliary power supply section (24) supplies control power for starting the control circuit (122) from the cable supporter (2) to the power converter (1) when the power system (4) is out of power.

According to this aspect, there is an advantage that the power converter (1) can be activated during a power outage in the power system (4).

In the power conversion system (100) according to the second aspect, in the first aspect, the auxiliary power supply unit (24) starts the control circuit (122) and then stops supplying the control power.

According to this aspect, there is an advantage that supplying more power than necessary from the auxiliary power supply section (24) can be suppressed.

In the power conversion system (100) according to the third aspect, in the first or second aspect, the auxiliary power supply unit (24) is connected to the power supply connection unit (241) to which the external power supply (6) that outputs control power is connected. )have.

According to this aspect, there is an advantage that the power converter (1) can be started using the external power source (6) during a power outage in the power system (4).

The power conversion system (100) according to the fourth aspect further includes a first cable (C11) in any one of the first to third aspects. The first cable (C11) is a cable that is connected between the storage battery (31) and the cable supporter (2) and is supplied with DC power. The auxiliary power supply section (24) includes an auxiliary power supply circuit (242). The auxiliary power supply circuit (242) generates control power by receiving DC power supplied from a path (a pair of power lines (L4)) of the first cable (C11) that is different from the storage battery (31).

According to this aspect, there is an advantage that the user (U1) does not need to wire the power supply connection part (241) using a separate power line, and the convenience for the user (U1) is improved.

In the power conversion system (100) according to the fifth aspect, in any one of the first to fourth aspects, the cable supporter (2) processes the communication with the mobile body (3) so that the main circuit ( 121). The control circuit (122) controls the main circuit (121) based on control parameters acquired from the processing section (25) by communicating with the processing section (25).

According to this aspect, the number of communication lines L2 wired between the cable supporter (2) and the power converter (1) can be reduced compared to a case without the processing unit (25). The advantage is that it can be done.

In the power conversion system (100) according to the sixth aspect, in the fifth aspect, the auxiliary power supply section (24) supplies operating power to the processing section (25).

According to this aspect, there is an advantage that there is no need to separately prepare a power source for supplying operating power to the processing section (25).

In the power conversion system (100) according to the seventh aspect, in any one of the first to sixth aspects, the power converter (1) includes a power supply circuit (124). The power supply circuit (124) receives the voltage applied from the auxiliary power supply unit (24) and generates a voltage to be applied to the control circuit (122). The voltage applied from the auxiliary power supply section (24) to the power supply circuit (124) is higher than the voltage generated by the power supply circuit (124).

According to this aspect, compared to the case where control power is directly supplied to the control circuit (122) from the auxiliary power supply unit (24), the power supply circuit (124) supplies stable control power to the control circuit (122). It has the advantage that it can be supplied.

The power conversion system (100) according to the eighth aspect, in any one of the first to seventh aspects, further includes a second cable (C12) and a power line (L3). The second cable (C12) is a cable connected between the cable supporter (2) and the power converter (1) and supplied with DC power. The power line (L3) is an electric line connected between the cable supporter (2) and the power converter (1) to which control power is supplied. The power line (L3) is included in the second cable (C12).

According to this aspect, there is an advantage that there is no need to prepare a power line for supplying control power to the control circuit (122) separately from the cable.

In the power conversion system (100) according to the ninth aspect, in any one of the first to eighth aspects, the cable supporter (2) includes a presentation unit (26) that presents completion of activation of the control circuit (122). ).

According to this aspect, there is an advantage that the user (U1) can easily understand that the activation of the control circuit (122) has been completed, in other words, that the blackout start using the storage battery (31) has been successful.

The cable supporter (2) according to the tenth aspect is used in the power conversion system (100) according to any one of the first to ninth aspects.

According to this aspect, there is an advantage that the power converter (1) can be activated during a power outage in the power system (4).

The power converter (1) according to the eleventh aspect is used in the power conversion system (100) according to any one of the first to ninth aspects.

According to this aspect, there is an advantage that the power converter (1) can be activated during a power outage in the power system (4).

The configurations according to the second to ninth aspects are not essential to the power conversion system (100) and can be omitted as appropriate.

100 Power conversion system 1 Power converter 121 Main circuit 122 Control circuit 124 Power supply circuit 2 Cable supporter 24 Auxiliary power supply section 241 Power supply connection section 242 Auxiliary power supply circuit 25 Processing section 26 Presentation section 3 Mobile object 31 Storage battery 4 Power system 6 External power supply C1 Cable C11 First cable C12 Second cable L3 Power line

A power conversion system according to one aspect of the present disclosure includes a power converter and a cable supporter. The power converter is provided between a storage battery included in a mobile object and an electric power system, and is capable of adjusting DC power discharged from the storage battery. The cable support supports a cable. The cable is connected between the movable body and the power converter to form a power supply path between the storage battery and the power converter. The power converter includes a main circuit that adjusts the DC power and a control circuit that controls the operation of the main circuit. The power conversion system further includes an auxiliary power supply section. The auxiliary power supply section supplies control power for activating the control circuit from the cable supporter to the power converter when the power system experiences a power outage. The cable support device includes a processing section that obtains control parameters of the main circuit by processing communication with the mobile object. The control circuit controls the main circuit based on the control parameters acquired from the processing section by communicating with the processing section.

Claims (11)

a power converter that is installed between a storage battery of a mobile object and an electric power system and that can adjust DC power discharged from the storage battery;
a cable supporter that supports a cable that is connected between the moving body and the power converter and forms a power supply path between the storage battery and the power converter;
The power converter includes:
a main circuit that adjusts the DC power;
a control circuit that controls the operation of the main circuit;
Further comprising an auxiliary power supply section that supplies control power for starting the control circuit from the cable supporter to the power converter when the power system has a power outage.
Power conversion system. The auxiliary power supply section stops supplying the control power after activating the control circuit.
The power conversion system according to claim 1. The auxiliary power supply section has a power supply connection section to which an external power supply that outputs the control power is connected.
The power conversion system according to claim 1 or 2. further comprising a first cable connected between the storage battery and the cable supporter to which DC power is supplied;
The auxiliary power supply unit includes an auxiliary power circuit that receives DC power supplied from a route different from the storage battery in the first cable and generates the control power.
The power conversion system according to any one of claims 1 to 3. The cable support has a processing unit that obtains control parameters of the main circuit by processing communication with the mobile object,
The control circuit controls the main circuit based on the control parameters acquired from the processing unit by communicating with the processing unit.
The power conversion system according to any one of claims 1 to 4. The auxiliary power supply unit supplies operating power to the processing unit,
The power conversion system according to claim 5. The power converter includes a power supply circuit that receives a voltage applied from the auxiliary power supply unit and generates a voltage to be applied to the control circuit,
The voltage applied from the auxiliary power supply unit to the power supply circuit is higher than the voltage generated by the power supply circuit.
The power conversion system according to any one of claims 1 to 6. a second cable connected between the cable support and the power converter and supplied with DC power;
further comprising: a power line connected between the cable support and the power converter to which the control power is supplied;
The power line is included in the second cable,
The power conversion system according to any one of claims 1 to 7. The cable support further includes a presentation unit that presents completion of activation of the control circuit.
The power conversion system according to any one of claims 1 to 8. Used in the power conversion system according to any one of claims 1 to 9,
Cable support. Used in the power conversion system according to any one of claims 1 to 9,
power converter.

Images