WO2021255924A1 - Dispositif de charge/décharge - Google Patents

Dispositif de charge/décharge Download PDF

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Publication number
WO2021255924A1
WO2021255924A1 PCT/JP2020/024159 JP2020024159W WO2021255924A1 WO 2021255924 A1 WO2021255924 A1 WO 2021255924A1 JP 2020024159 W JP2020024159 W JP 2020024159W WO 2021255924 A1 WO2021255924 A1 WO 2021255924A1
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WO
WIPO (PCT)
Prior art keywords
power
housing
charging
discharging device
capacitor
Prior art date
Application number
PCT/JP2020/024159
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English (en)
Japanese (ja)
Inventor
倫雄 山田
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2020/024159 priority Critical patent/WO2021255924A1/fr
Publication of WO2021255924A1 publication Critical patent/WO2021255924A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

Definitions

  • the present disclosure relates to a charging / discharging device having a function of charging a power storage device and a function of converting DC power supplied from the power storage device into AC power.
  • the AC power supplied from the commercial system is used to charge the power storage device installed in the electric vehicle, and the DC power stored in the power storage device installed in the electric vehicle is used to charge the inside of the house.
  • Charge / discharge systems that supply AC power to loads are widespread.
  • a load is a device that operates based on AC power.
  • the charge / discharge system charges the power storage device mounted on the electric vehicle based on the AC power supplied from the commercial system
  • the charge / discharge device included in the charge / discharge system uses the AC power supplied from the commercial system. It is converted into DC power, and the DC power obtained by the conversion is supplied to the electric vehicle.
  • the charge / discharge device converts the DC power supplied from the power storage device into AC power.
  • the AC power obtained by the conversion is supplied to the load.
  • the above charging / discharging device may be called an EV power conditioner (Electric Vehicle Power Conditioning System: EV-PCS).
  • the charging / discharging device is connected to a cable with a connector for charging / discharging the power storage device mounted on the electric vehicle.
  • the charging / discharging device is also connected to a wiring for receiving electric power supplied from the commercial system and a wiring for supplying electric power to the load.
  • the charging / discharging device has a noise filter that suppresses the electromagnetic noise generated inside from propagating to the outside.
  • the noise filter on the grid side is arranged on the power conversion circuit side of the switch for grid interconnection.
  • electromagnetic noise propagating in space is coupled to the wiring from the noise filter to the system, and the electromagnetic noise may be conducted through the wiring on the system side and leak to the system side.
  • the present disclosure has been made in view of the above, and while suppressing an increase in the internal temperature due to heat generated inside, even if the housing is miniaturized, a space is provided in the wiring on the commercial system side of the noise filter. It is an object of the present invention to obtain a charging / discharging device in which the propagated electromagnetic noise is combined to prevent the electromagnetic noise from leaking to the commercial system side by conducting the wiring on the commercial system side.
  • the charging / discharging device has a function of converting AC power into DC power and charging the power storage device based on the DC power, and is supplied from the power storage device. It has a function of converting DC power to AC power.
  • the charging / discharging device has a power conversion unit having a function of converting AC power into DC power and a function of converting DC power into AC power, and a conductive power conversion unit electromagnetically.
  • the charging / discharging device suppresses an increase in internal temperature due to heat generated inside, and even if the housing is miniaturized, electromagnetic noise propagating in space is coupled to the wiring on the commercial system side of the noise filter. This has the effect of suppressing electromagnetic noise from conducting the wiring on the commercial system side and leaking to the commercial system side.
  • the figure for demonstrating the charge / discharge system which concerns on Embodiment 1. The figure which shows typically the appearance of the charge / discharge apparatus which concerns on Embodiment 1.
  • Circuit configuration diagram of the charging / discharging device according to the first embodiment The figure which shows typically the cross section of the charge / discharge apparatus which concerns on Embodiment 1.
  • Circuit configuration diagram of the charging / discharging device according to the second embodiment The figure which shows typically the cross section of the charge / discharge apparatus which concerns on Embodiment 2.
  • the figure which shows the processing circuit when at least a part of the control unit which the charge / discharge apparatus which concerns on Embodiment 1 has is realized by the processing circuit.
  • FIG. 1 is a diagram showing a configuration of a charge / discharge system 1 according to the first embodiment.
  • the charging / discharging system 1 includes a solar cell 2 that generates electricity based on sunlight, and a solar cell power conditioner 3 that converts DC power obtained by the solar cell 2 into AC power.
  • the solar cell power conditioner 3 is described as “PV-PCS3”.
  • PV-PCS is an abbreviation for Photo Voltaic Power Conditioning System.
  • the charge / discharge system 1 has a charge / discharge device 4 having a function of converting AC power into DC power to charge a power storage device based on the DC power and a function of converting DC power supplied from the power storage device into AC power. Further has.
  • the power storage device is not shown in FIG.
  • the power storage device is mounted on the electric vehicle 91.
  • FIG. 1 also shows the electric vehicle 91.
  • the electric vehicle 91 is an electric vehicle.
  • the electric vehicle 91 is not limited to the electric vehicle, and may be, for example, a plug-in hybrid vehicle.
  • the power storage device may not be mounted on the electric vehicle 91. In the following, it is assumed that the power storage device is mounted on the electric vehicle 91.
  • the charge / discharge system 1 further includes a charge / discharge cable 5 used when charging or discharging the power storage device mounted on the electric vehicle 91.
  • the charge / discharge cable 5 is connected to the charge / discharge device 4, and is a cable for connecting the charge / discharge device 4 and the electric vehicle 91. Furthermore, the charge / discharge cable 5 is a cable for connecting the charge / discharge device 4 and the power storage device mounted on the electric vehicle 91.
  • the charge / discharge cable 5 transmits DC power, a signal related to at least one of charging and discharging, and a control power source between the charging / discharging device 4 and the electric vehicle 91.
  • the charge / discharge device 4 supplies DC power to the power storage device mounted on the electric vehicle 91 via the charge / discharge cable 5, and receives the DC power stored in the power storage device.
  • a connector 6 is provided at the end of the two ends of the charge / discharge cable 5 that is connected to the electric vehicle 91.
  • the charge / discharge cable 5 connects the charge / discharge device 4 and the electric vehicle 91.
  • the charge / discharge cable 5 connects the charge / discharge device 4 and the power storage device mounted on the electric vehicle 91. No inlet is shown in FIG.
  • the charge / discharge system 1 further includes a distribution board 7 to which the load 92 is connected.
  • FIG. 1 also shows the load 92.
  • the load 92 is a device that operates based on AC power. Examples of the load 92 are refrigerators, lighting fixtures, cooking equipment, telephones, video equipment or audio equipment. An example of a video device is a television set.
  • the distribution board 7 is installed in a house.
  • the distribution board 7 has a main circuit breaker 7a and a plurality of branch breakers 7b connected to the main circuit breaker 7a.
  • FIG. 1 shows four branch breakers 7b.
  • a load 92 is connected to each of the plurality of branch breakers 7b.
  • FIG. 1 shows a situation in which one load 92 is connected to one branch breaker 7b.
  • the charging / discharging device 4 is a device capable of supplying electric power to the electric power storage device mounted on the electric vehicle 91 and supplying the electric power stored in the electric power storage device to the load 92.
  • the charge / discharge system 1 further includes a main leakage breaker 8 connected to a commercial system 93 that supplies AC power.
  • FIG. 1 also shows a commercial system 93.
  • the primary side of the main leakage breaker 8 is connected to the commercial system 93.
  • the charge / discharge system 1 further includes a first switching switch 9 connected to a charge / discharge device 4, a distribution board 7, and a main leakage breaker 8.
  • the charging / discharging system 1 includes a wiring 10 connecting the charging / discharging device 4 and the first switching switch 9, a wiring 11 connecting the distribution board 7 and the first switching switch 9, and a main leakage. It further has a wiring 12 connecting the secondary side of the circuit breaker 8 and the first switching switch 9.
  • the common terminal 9a to which one end of the two ends of the wiring 11 is connected and one end of the two ends of the wiring 12 are connected to each other. It has a terminal 9b, a terminal 9c to which one end of the two ends of the wiring 10 is connected, and a contact 9d to which one end is connected to the common terminal 9a. The other end of the contact 9d is connected to the terminal 9b or terminal 9c.
  • the first switching switch 9 has a function of connecting the distribution board 7 to the charging / discharging device 4 or the main leakage circuit breaker 8. Specifically, when the other end of the contact 9d is connected to the terminal 9b, the first switching switch 9 connects the distribution board 7 and the main leakage circuit breaker 8. When the other end of the contact 9d is connected to the terminal 9c, the first switching switch 9 connects the distribution board 7 and the charging / discharging device 4.
  • the charge / discharge system 1 includes a second switching switch 13 connected to the wiring 11 and the solar cell power conditioner 3, and a wiring 14 connecting the solar cell power conditioner 3 and the second switching switch 13. Further, the wiring 15 connecting the wiring 11 and the second switching switch 13 is provided. Since the wiring 11 connects the distribution board 7 and the first switching switch 9 as described above, the second switching switch 13 is connected to the distribution board 7 and the first switching switch 9 via the wiring 15. Has been done.
  • the charge / discharge system 1 further includes an AC device 16 connected to the second switching switch 13 and the charging / discharging device 4, and a wiring 17 connecting the second switching switch 13 and the AC device 16.
  • the common terminal 13a to which one end of the two ends of the wiring 14 is connected and one end of the two ends of the wiring 15 are connected to each other.
  • the terminal 13b has a terminal 13c to which one end of the two ends of the wiring 17 is connected, and a contact 13d to which one end is connected to the common terminal 13a. The other end of the contact 13d is connected to the terminal 13b or terminal 13c.
  • the second switching switch 13 has a function of connecting the solar cell power conditioner 3 to the wiring 15 or the AC device 16. Specifically, when the other end of the contact 13d is connected to the terminal 13b, the second switching switch 13 connects the solar cell power conditioner 3 and the wiring 15. When the other end of the contact 13d is connected to the terminal 13c, the second switching switch 13 connects the solar cell power conditioner 3 and the AC device 16. The electric power obtained by the solar cell power conditioner 3 is supplied to the electric vehicle 91, the load 92, or the commercial system 93.
  • the charging / discharging system 1 includes a maintenance circuit breaker 18 which is an opening / closing means having a function of connecting and separating the main leakage circuit breaker 8 and the charging / discharging device 4, and maintenance with the secondary side of the main leakage circuit breaker 8. It further has a wiring 19 connecting to the circuit breaker 18.
  • the maintenance breaker 18 opens the wiring between the main leakage breaker 8 and the charge / discharge device 4.
  • the charge / discharge system 1 further includes an overcurrent circuit breaker 20, a wiring 21 connecting the maintenance circuit breaker 18 and the overcurrent circuit breaker 20.
  • the secondary side of the maintenance circuit breaker 18 is connected to the charging / discharging device 4 via the wiring 21.
  • the charge / discharge system 1 opens and closes to open the connection between the commercial system 93 and the charge / discharge device 4 when a power failure occurs in the commercial system 93 and the operation of the charge / discharge system 1 shifts from the interconnection operation to the independent operation. Further, it has a switch for disconnection 22 which is a means.
  • the charge / discharge system 1 further includes an in-home controller 23 that controls the entire charge / discharge system 1. In FIG. 1, the home controller 23 is described as "HEMS23". HEMS is an abbreviation for Home Energy Management System.
  • the charging / discharging device 4 controls the charging / discharging of the power storage device mounted on the electric vehicle 91, and has a function of converting AC power supplied from the commercial system 93 or the solar cell power conditioner 3 into DC power, and an electric vehicle. It has a power conversion unit having a function of converting DC power supplied from 91 into AC power.
  • the charging / discharging device 4 further includes a noise filter that suppresses electromagnetic noise generated inside the charging / discharging device 4 from leaking to the commercial system 93.
  • FIG. 1 does not show a power converter and a noise filter.
  • the operation mode of the charge / discharge system 1 is roughly classified into a charge mode and a discharge mode.
  • the charging / discharging system 1 can supply the electric power supplied from the commercial system 93 and the electric power supplied from the solar cell 2 to the electric vehicle 91.
  • the charging / discharging system 1 opens the disconnection switch 22 so that the electric vehicle 91 is disconnected from the commercial system 93 and the charging / discharging system 1 is supplied via the second switching switch 13.
  • the electric power of the battery 2 can be used to charge the power storage device mounted on the electric vehicle 91.
  • the charge / discharge system 1 In the discharge mode, the charge / discharge system 1 normally determines the amount of power supplied from the power storage device mounted on the electric vehicle 91 based on the amount of power generated by the solar cell 2 and the amount of power consumed by the load 92. Control. The shortage of electric power is covered by the electric power supplied from the commercial system 93.
  • the charging / discharging device 4 can perform seamless charging / discharging that seamlessly switches between the charging mode and the discharging mode, and is based on the amount of power generated by the solar cell 2 and the amount of power consumed by the load 92 when the commercial system 93 fails. In addition, the amount of electric power supplied from the power storage device mounted on the electric vehicle 91 is controlled. When the charging / discharging system 1 is disconnected from the commercial system 93, seamless charging / discharging is performed, and at least one of the electric power supplied from the solar cell 2 and the electric power supplied from the electric vehicle 91 transfers the electric power to the load 92.
  • the operation mode in which the supply is continued is referred to as an independent operation mode.
  • the AC power supplied from the commercial system 93 is supplied to the load 92 via the main leakage breaker 8, the first switching switch 9, the main breaker 7a, and the branch breaker 7b.
  • the commercial system 93 is connected to the AC output side of the solar cell power conditioner 3 via the second switching switch 13, and the solar cell power conditioner 3 that detects the power supplied from the commercial system 93 is the commercial system. Perform interconnection operation.
  • the AC power supplied from the commercial system 93 is also supplied to the charging / discharging device 4 via the overcurrent circuit breaker 20 and the disconnection switch 22.
  • the charging / discharging device 4 converts AC power supplied from the commercial system 93 into DC power.
  • the DC power obtained by the conversion is supplied to the power storage device mounted on the electric vehicle 91 via the charge / discharge cable 5. As a result, the power storage device mounted on the electric vehicle 91 is charged.
  • the charging / discharging device 4 When the charging / discharging device 4 detects that the commercial system 93 has a power failure, it outputs a command to open the disconnection switch 22 to the disconnection switch 22. As a result, the connection between the charging / discharging device 4 and the commercial system 93 is opened. After that, the charging / discharging device 4 converts the DC power supplied from the power storage device mounted on the electric vehicle 91 into AC power. The AC power obtained by the conversion is supplied to the load 92 via the second switching switch 9, the main breaker 7a, and the branch breaker 7b.
  • the power consumption of a general house is 200V for single phase and is usually one of 3kW to 12kW.
  • the amount of power generated by the solar cell 2 varies depending on, for example, the area of the roof of the house and the amount of solar radiation, and is generally one of 2 kW to 12 kW. Due to the improvement of the power conversion efficiency of the solar cell 2 and the improvement of the roof structure of the house, the power generation amount of the solar cell 2 tends to increase in recent years.
  • the electric power capacity of the electric power storage device mounted on the electric vehicle 91 is any one from 1 kWh to 30 kWh, and tends to increase dramatically due to the improvement of the performance related to the electric storage.
  • FIG. 2 is a diagram for explaining the charge / discharge system 1 according to the first embodiment.
  • the home controller 23 is connected to a controller 25 having a display 24 for displaying information. Also in FIG. 2, the home controller 23 is described as "HEMS23".
  • the controller 25 is arranged inside the house 26 together with the home controller 23.
  • the display 24 displays a picture showing an electric vehicle and a character string "connecting”.
  • the controller 25 further has a speaker. No speaker is shown in FIG.
  • the controller 25 further has an operation unit operated by the user.
  • the controller 25 is shown with five buttons. Each of the five buttons contains the character string "ECO check”, “run / stop”, “menu", “back” or “decision". The five buttons are an example of an operation unit.
  • the in-house controller 23 controls the charging / discharging device 4 located outside the house 26, and causes the display unit 25 to display the operation status of the charging / discharging device 4.
  • the home controller 23 operates the charge / discharge device 4 and the load 92 based on the power consumption of the load 92 connected to the distribution board 7 shown in FIG. 1 and the power generation amount of the solar cell power conditioner 3. Comprehensive control.
  • the charging / discharging system 1 When the charging / discharging system 1 is operated independently, it is possible to suppress the generation of unnecessary power consumption in the load 92, and the electric power stored in the power storage device mounted on the electric vehicle 91 is effectively used for commercial purposes. Even if the system 93 fails for a relatively long period of time, the power supply to the load 92 can be continued. As a result, the user can continue to live with electricity even if a power outage occurs.
  • the user can operate the charging and discharging of the power storage device mounted on the electric vehicle 91 via the home controller 23, and can confirm the charging status. That is, the user inside the house 26 does not have to leave the house 26 and go to the charge / discharge device 4 to check the operation screen provided on the charge / discharge device 4 located outside the house 26. The status of the electric power stored in the power storage device mounted on the vehicle 91 can be confirmed inside the house 26.
  • FIG. 3 is a diagram schematically showing the appearance of the charging / discharging device 4 according to the first embodiment.
  • the charging / discharging device 4 has a housing 4a constituting the outer shell of the charging / discharging device 4.
  • the housing 4a is made of a conductive metal.
  • the charging / discharging device 4 is formed of a holder 4b attached to the side surface of the housing 4a, an operation switch 4c operated by the user, a front cover 4d made of conductive metal, and a conductive metal. It further has an upper surface 4e and a surface surface 4e.
  • the front cover 4d and the upper surface 4e also constitute the outer shell of the charging / discharging device 4.
  • the housing 4a, the front cover 4d, and the upper surface 4e constitute a second housing that surrounds the first housing and has conductivity, which will be described later.
  • FIG. 3 also shows the charge / discharge cable 5 and the connector 6.
  • the user When charging or discharging the power storage device mounted on the electric vehicle 91, the user pulls out the connector 6 from the holder 4b and inserts the connector 6 into the inlet of the electric vehicle 91. As a result, the charging / discharging device 4 is connected to the electric vehicle 91. After inserting the connector 6 into the inlet, the user starts the charging or discharging operation by using the operation switch 4c of the charging / discharging device 4 or the operation unit of the controller 25. The charging / discharging device 4 performs a charging or discharging operation based on at least one of the operating status of the load 92 connected to the distribution board 7 and the power generation status of the solar cell power conditioner 3.
  • the user stops the charging or discharging operation by using the operation switch 4c of the charging / discharging device 4 or the operation unit of the controller 25. After the operation is stopped, the user pulls out the connector 6 from the inlet of the electric vehicle 91, inserts the connector 6 into the holder 4b, and fixes the connector 6.
  • the noise filter on the AC side for the input / output power of the commercial system 93 is housed inside the housing 4a. Since the noise filter and the circuit other than the noise filter are located inside the housing 4a, they are not exposed to wind and rain and moisture including salt.
  • FIG. 4 is a circuit configuration diagram of the charging / discharging device 4 according to the first embodiment.
  • FIG. 4 also schematically shows the charge / discharge cable 5 and the connector 6.
  • the charging / discharging device 4 further includes a housing 41 made of metal and having conductivity.
  • the housing 41 is a first housing located inside the second housing composed of the housing 4a, the front cover 4d, and the upper surface 4e.
  • the charging / discharging device 4 further includes a power conversion unit and a control circuit provided inside the housing 41.
  • the power conversion unit includes a converter and an inverter.
  • the control circuit may be provided inside the charging / discharging device 4, or may be provided outside the housing 41.
  • the charging / discharging device 4 includes a grid interconnection relay 51, a first reactor 52a, a second reactor 52b, a first inverter main circuit 53, a second inverter main circuit 54, a third inverter main circuit 55, and a diode. Further has 56.
  • the grid interconnection relay 51, the first reactor 52a, the second reactor 52b, the first inverter main circuit 53, the second inverter main circuit 54, the third inverter main circuit 55, and the diode 56 are located inside the housing 41. There is.
  • the grid interconnection relay 51 switches between a state in which AC power supplied from the commercial system 93 via the connection line 86 is transmitted to the inside of the housing 41 and a state in which the AC power is not transmitted.
  • Each of the first inverter main circuit 53, the second inverter main circuit 54, and the third inverter main circuit 55 has a plurality of semiconductor switches.
  • Each of the first inverter main circuit 53, the second inverter main circuit 54, and the third inverter main circuit 55 has a function of converting AC power into DC power and a function of converting DC power into AC power.
  • Each of the first inverter main circuit 53, the second inverter main circuit 54, and the third inverter main circuit 55 is an example of the power conversion unit. Since the first inverter main circuit 53, the second inverter main circuit 54, and the third inverter main circuit 55 are located inside the housing 41, the housing 41 electromagnetically shields the power conversion unit.
  • the charging / discharging device 4 further includes a DC bus 57 that connects the first inverter main circuit 53 and the second inverter main circuit 54. The anode of the diode 56 is connected to the DC bus 57.
  • the charging / discharging device 4 is between the capacitor 58, the high-frequency isolated transformer 59 located between the second inverter main circuit 54 and the third inverter main circuit 55, and the third inverter main circuit 55 and the charging / discharging cable 5. It also has a capacitor 60 to be located. The capacitor 58, the high frequency isolation transformer 59 and the capacitor 60 are located inside the housing 41. One end of the capacitor 58 is connected to the DC bus 57.
  • the second inverter main circuit 54, the third inverter main circuit 55, and the high frequency isolation transformer 59 form a bidirectional converter circuit.
  • the bidirectional converter circuit seamlessly supplies the electric power output from the second inverter main circuit 54 to the electric vehicle 91 while insulating the second inverter main circuit 54 and the third inverter main circuit 55.
  • the capacitor 60 smoothes the voltage applied to the bidirectional converter circuit.
  • the charging / discharging device 4 drives a rectifier circuit 61 that converts AC power supplied from the commercial system 93 into DC power, a first drive unit 62 that drives the first inverter main circuit 53, and a second inverter main circuit 54.
  • the second drive unit 63 is further provided, and the third drive unit 64 for driving the third inverter main circuit 55 is further provided.
  • the rectifier circuit 61, the first drive unit 62, the second drive unit 63, and the third drive unit 64 are located inside the housing 41.
  • the charging / discharging device 4 is connected to a power supply unit 65 to which power is supplied, a control unit 66 that controls a first drive unit 62, a second drive unit 63, and a third drive unit 64, and a power supply unit 65. Further includes a battery unit 67.
  • the power supply unit 65, the control unit 66, and the battery unit 67 are located inside the housing 41.
  • the cathode of the diode 56 is connected to the power supply unit 65.
  • the diode 56 outputs the current flowing through the DC bus 57 to the power supply unit 65.
  • the other end of the capacitor 58 is connected to the power supply unit 65.
  • the capacitor 58 smoothes the voltage of the electric power flowing through the DC bus 57 and outputs the electric power to the electric power supply unit 65.
  • the rectifier circuit 61 converts the AC power supplied from the commercial system 93 into DC power, and supplies the DC power obtained by the conversion to the power supply unit 65.
  • the first drive unit 62 drives a plurality of semiconductor switches constituting the first inverter main circuit 53 based on the control signal output from the control unit 66.
  • the second drive unit 63 drives a plurality of semiconductor switches constituting the second inverter main circuit 54 based on the control signal output from the control unit 66.
  • the third drive unit 64 drives a plurality of semiconductor switches constituting the third inverter main circuit 55 based on the control signal output from the control unit 66.
  • the battery unit 67 supplies power to the first drive unit 62, the second drive unit 63, the third drive unit 64, the control unit 66, and the drive unit inside the electric vehicle 91 in the event of a power failure in the commercial system 93.
  • the battery unit 67 supplies a control power source for controlling the disconnection switch 22 shown in FIG. 1 to the disconnection switch 22 in the event of a power failure of the commercial system 93.
  • the charge / discharge system 1 normally connects to the commercial system 93, and when the commercial system 93 fails, the contactor of the disconnection switch 22 shown in FIG. 1 is opened and the contactor is opened. 1
  • the control unit 66 controls a bidirectional converter circuit composed of a second inverter main circuit 54, a third inverter main circuit 55, and a high frequency isolation transformer 59.
  • the control unit 66 also controls electrical components other than the bidirectional converter circuit. Examples of the electric component are an overcurrent circuit breaker 20 and a switch for disconnection 22.
  • the control unit 66 is connected to the alternator 16.
  • the control unit 66 communicates with the vehicle control unit inside the electric vehicle 91 via the charge / discharge cable 5, the connector 6, and the inlet.
  • the control unit 66 controls the charging and discharging of the power storage device mounted on the electric vehicle 91 by communicating with the vehicle control unit, and changes the load 92 inside the house and the generated power of the solar cell 2. It controls the power that follows the fluctuation of the amount.
  • the charging / discharging device 4 further includes a terminal block 68 and a terminal block 69 for electrically connecting the charging / discharging device 4 to the commercial system 93 via the connection line 86.
  • the charging / discharging device 4 is an AC power connection located inside the second housing composed of the housing 4a, the front cover 4d, and the upper surface 4e, and outside the housing 41 which is the first housing. It further has a unit 70. That is, the AC power connection unit 70 is located between the first housing and the second housing.
  • the AC power connection unit 70 is a means for connecting AC power to the power conversion unit.
  • the charging / discharging device 4 is a Y capacitor 71 located inside the second housing composed of the housing 4a, the front cover 4d, and the upper surface 4e, and outside the housing 41 which is the first housing. And further has a Y capacitor 72. That is, the Y capacitor 71 and the Y capacitor 72 are located between the first housing and the second housing. The Y capacitor 71 and the Y capacitor 72 are connected to the AC power connection portion 70 and the housing 41 which is the first housing. The Y capacitor 71 and the Y capacitor 72 are examples of the first noise filter.
  • the terminal block 68 and the terminal block 69 are connected to the system wiring and the housing 41 via the Y capacitor 71 and the Y capacitor 72.
  • the charging / discharging device 4 further includes a fastening portion 73a that electrically connects the housing 41, which is the first housing, and the housing 4a constituting the second housing.
  • the fastening portion 73a has a screw made of metal, and the screw electrically connects the housing 41 and the housing 4a. That is, the second housing is electrically connected to the first housing.
  • the space surrounded by the outside of the housing 41, which is the first housing, and the inside of the second housing formed by the housing 4a, the front cover 4d, and the upper surface 4e is the area surrounded by the housing 41. On the other hand, it is electromagnetically shielded.
  • the charging / discharging device 4 further includes a common mode choke coil 74 and a common mode choke coil 75.
  • the common mode choke coil 74 and the common mode choke coil 75 are located inside the housing 41.
  • the common mode choke coil 74 is arranged in the housing 41 at the final electrical stage toward the commercial system 93 with respect to the first inverter main circuit 53, the second inverter main circuit 54, and the third inverter main circuit 55.
  • the common mode choke coil 75 is arranged in the housing 41 at the final electrical stage toward the electric vehicle 91 with respect to the first inverter main circuit 53, the second inverter main circuit 54, and the third inverter main circuit 55. ing.
  • FIG. 5 is a diagram schematically showing a cross section of the charging / discharging device 4 according to the first embodiment.
  • FIG. 5 schematically shows a cross section of the charging / discharging device 4 when the inside of the charging / discharging device 4 is viewed from the side surface of the charging / discharging device 4.
  • the plurality of components of the charging / discharging device 4 are not hatched.
  • the dashed arrow in FIG. 5 indicates the flow of air.
  • the charging / discharging device 4 further includes a fastening portion 73b that electrically connects the housing 41, which is the first housing, and the housing 4a constituting the second housing.
  • the fastening portion 73b has a screw made of metal. Specifically, a screw connects the housing 41 and the housing 4a.
  • the charging / discharging device 4 further includes a printed wiring board 76 on which a terminal block 68, a terminal block 69, a Y capacitor 71, and a Y capacitor 72 are mounted.
  • the printed wiring board 76 is located in the space between the front cover 4d and the housing 41.
  • the ground side of the Y capacitor 71 and the Y capacitor 72 is connected to the conductive portion of the housing 41 via the printed wiring board 76 at the shortest distance.
  • a connection line 86 for connecting the charging / discharging device 4 to the commercial system 93 is connected to the terminal block 68 and the terminal block 69.
  • the charging / discharging device 4 further has a printed wiring board 77 located inside the housing 41. Electrical components related to power conversion are mounted on the printed wiring board 77. Examples of electric components involved in power conversion are the first inverter main circuit 53, the second inverter main circuit 54, and the third inverter main circuit 55.
  • the charging / discharging device 4 further includes heat radiation fins 78 located in the space between the housing 41 and the housing 4a. The heat generating elements of the first inverter main circuit 53, the second inverter main circuit 54, and the third inverter main circuit 55 are in thermal contact with the heat dissipation fins 78. The heat generated by the heat generating element is conducted to the heat radiating fin 78, and the heat generating element is cooled.
  • the charging / discharging device 4 further has a cooling fan 79 located inside the housing 41.
  • the cooling fan 79 agitates the air inside the housing 41.
  • the cooling fan 79 suppresses the occurrence of a local temperature rise by applying air to the heat generating elements of the first inverter main circuit 53, the second inverter main circuit 54, and the third inverter main circuit 55. Since the cooling fan 79 agitates the air, it is possible to suppress the temperature rise of the heat-generating component, so that the circuit can be arranged in a relatively narrow space. As a result, the size of the charging / discharging device 4 can be reduced.
  • circuits other than the printed wiring board 76 on which the Y capacitor 71 and the Y capacitor 72 are mounted are gathered in the space surrounded by the housing 41.
  • the circuit can be attached to the housing 41 and the circuit can be removed from the housing 41 relatively easily, and the effects of good workability and maintainability can be obtained.
  • the heat dissipation fin 78 is located inside the housing 4a and outside the housing 41, and dissipates heat to the outside air.
  • the charging / discharging device 4 further includes a cooling fan 80.
  • the cooling fan 80 is located inside the housing 4a and outside the housing 41, and blows outside air to the heat radiation fins 78 to cool the element.
  • An example of the element is a heat generating element of the first inverter main circuit 53, the second inverter main circuit 54, and the third inverter main circuit 55.
  • the convex portion of the heat radiating fin 78 protrudes inside the housing 41 and thermally contacts the element to dissipate heat.
  • An example of the element is a heat generating element of the first inverter main circuit 53, the second inverter main circuit 54, and the third inverter main circuit 55.
  • the heat of the housing 41 is also dissipated from the heat radiating fins 78, and the size of the housing 41 can be reduced.
  • the charging / discharging device 4 efficiently discharges the heat generated in each of the first reactor 52a, the second reactor 52b, the common mode choke coil 74, and the common mode choke coil 75 to the outside of the housing 4a via the heat radiation fins 78. can do.
  • the printed wiring board 76 is surrounded by the housing 4a, the front cover 4d, and the upper surface 4e, and is not exposed to rainwater, moisture including salt, and outdoor dust. That is, the charging / discharging device 4 can suppress damage to the circuit due to humidity, salt damage, and dust. The charging / discharging device 4 can suppress leakage of electromagnetic noise from the power conversion unit, which is a noise source, to the system side.
  • the printed wiring board 77 Since the printed wiring board 77 is located inside the housing 41, it is not exposed to rainwater, moisture including salt, and outdoor dust. The radiated noise generated from the printed wiring board 77 does not leak to the outside of the charging / discharging device 4.
  • the charging / discharging device 4 can suppress the occurrence of a local temperature rise due to a component that generates heat by agitating the air by the cooling fan 79.
  • the Y condenser 71 and the Y condenser 72 are arranged in a thermally and electromagnetically sealed space, but since they are non-heat generating parts, a cooling fan is not required in the arranged space. Since the Y capacitor 71 and the Y capacitor 72 are smaller than the space inside the second housing and do not require a cooling fan, the size of the charging / discharging device 4 can be reduced.
  • the printed wiring board 76 on which only the non-heating component of the noise filter is mounted and the printed wiring on which the power conversion unit and the heat generating component of the noise filter are mounted. Since the board 77 is located in a different space, it is necessary to connect the printed wiring board 76 and the printed wiring board 77 with a wire harness.
  • the Y capacitor 71 and the Y capacitor 72 release conduction noise to the ground side, so that the charging / discharging device 4 is supplied to the commercial system 93. Radiation noise is not coupled to the connection line 86.
  • the charging / discharging device 4 is high frequency noise of 1 MHz or more transferred to the wire harness.
  • the electromagnetic noise conducted through the wiring on the side of the commercial system 93 especially the electromagnetic noise of 1 MHz or more, is made to stand side by side with miniaturization, dust resistance, water resistance, salt resistance and effective heat dissipation.
  • the Y capacitor 71 and the Y capacitor 72 are examples of the first noise filter.
  • the charging / discharging device 4 has a heat radiation fin 78, a cooling fan 79, a cooling fan 80, a Y condenser 71, and a Y condenser 72. Therefore, the charging / discharging device 4 suppresses the rise in the internal temperature due to the heat generated inside, and even if the first housing and the second housing are miniaturized, the charging / discharging device 4 is more than the first noise filter in the commercial system 93. It is possible to prevent the electromagnetic noise propagating in the space from being coupled to the wiring on the side and conducting the electromagnetic noise on the wiring on the side of the commercial system 93 and leaking to the side of the commercial system 93.
  • the power storage device mounted on the electric vehicle 91 has been described. Even if the connector 6 is changed to another connector and the power storage device mounted on the electric vehicle 91 is replaced with another power storage device such as a stationary storage battery, the same effect as described above can be obtained.
  • the power storage device may be installed indoors.
  • the Y capacitor 71 and the Y capacitor 72 are provided between the wiring from the charging / discharging device 4 to the commercial system 93 and the housing 41.
  • a Y capacitor between the wiring from the charging / discharging device 4 to the electric vehicle 91 and the housing 41, it is possible to prevent electromagnetic noise generated inside the charging / discharging device 4 from leaking to the charging / discharging cable 5. Can be done.
  • a Y capacitor is provided between the wiring from the charging / discharging device 4 to the commercial system 93 and the housing 41, and a Y capacitor is provided between the wiring from the charging / discharging device 4 to the electric vehicle 91 and the housing 41.
  • the charging / discharging device 4A according to the second embodiment has a Y capacitor that suppresses electromagnetic noise generated inside the charging / discharging device 4 from leaking to the outside of the charging / discharging device 4.
  • FIG. 6 is a circuit configuration diagram of the charging / discharging device 4A according to the second embodiment
  • FIG. 7 is a diagram schematically showing a cross section of the charging / discharging device 4A according to the second embodiment.
  • the charging / discharging device 4A has all the components of the charging / discharging device 4 according to the first embodiment.
  • the charging / discharging device 4A has components that the charging / discharging device 4 does not have.
  • the differences from the first embodiment will be mainly described.
  • the charging / discharging device 4A has a fastening portion 73c that electrically connects the housing 41 which is the first housing and the housing 4a constituting the second housing.
  • the fastening portion 73c has a screw made of metal, and the screw electrically connects the housing 41 and the housing 4a.
  • the charging / discharging device 4A is a DC power connection located inside the second housing composed of the housing 4a, the front cover 4d, and the upper surface 4e, and outside the housing 41 which is the first housing. It further has a portion 81. That is, the DC power connection portion 81 is located between the first housing and the second housing.
  • the DC power connection unit 81 is a means for connecting DC power to the power conversion unit.
  • the charging / discharging device 4A is a Y capacitor 82 located inside the second housing composed of the housing 4a, the front cover 4d, and the upper surface 4e, and outside the housing 41 which is the first housing. And further has a Y capacitor 83. That is, the Y capacitor 82 and the Y capacitor 83 are located between the first housing and the second housing. The Y capacitor 82 and the Y capacitor 83 are connected to the DC power connection portion 81. The Y capacitor 82 and the Y capacitor 83 are also connected to the housing 41, which is the first housing, and the charge / discharge cable 5 by the fastening portion 73b. The Y capacitor 82 and the Y capacitor 83 are examples of the second noise filter.
  • the charging / discharging device 4A further has a printed wiring board 84 on which a Y capacitor 82 and a Y capacitor 83 are mounted.
  • the Y capacitor 82, the Y capacitor 83, and the printed wiring board 84 are located inside the housing 4a, the front cover 4d, and the upper surface 4e, and outside the housing 41.
  • the Y capacitor 82, the Y capacitor 83, and the printed wiring board 84 are located in a closed space different from the closed space in which the Y capacitor 71, the Y capacitor 72, and the printed wiring board 76 are located.
  • the Y capacitor 82 and the Y capacitor 83 are connected to the housing 41 at the shortest distance via the printed wiring board 84.
  • the charging / discharging device 4A further includes a wiring 5a connecting the printed wiring board 77 and the printed wiring board 84.
  • the charging / discharging device 4A has a Y capacitor 71 and a Y capacitor 72 located on the AC input side, and also has a Y capacitor 82 and a Y capacitor 83 located on the DC input side. Depending on the leakage level of electromagnetic noise, the charging / discharging device 4A may not have the Y capacitor 71 and the Y capacitor 72.
  • Both the charging / discharging device 4 according to the first embodiment and the charging / discharging device 4A according to the second embodiment have a function of charging the power storage device and a function of converting the DC power supplied from the power storage device into AC power. That is, the charging / discharging device 4 and the charging / discharging device 4A have a charging function and a discharging function.
  • the charging / discharging device 4 and the charging / discharging device 4A may be replaced with a charging device having a charging function and not having a discharging function.
  • FIG. 8 is a diagram showing a processor 97 when at least a part of the control unit 66 included in the charging / discharging device 4 according to the first embodiment is realized by the processor 97. That is, at least a part of the functions of the control unit 66 may be realized by the processor 97 that executes the program stored in the memory 98.
  • the processor 97 is a CPU (Central Processing Unit), a processing device, an arithmetic unit, a microprocessor, or a DSP (Digital Signal Processor).
  • FIG. 8 also shows the memory 98.
  • the part of the functions of the control unit 66 is realized by the processor 97, the part of the functions is realized by the processor 97 and software, firmware, or a combination of software and firmware.
  • the software or firmware is described as a program and stored in the memory 98.
  • the processor 97 realizes at least a part of the functions of the control unit 66 by reading and executing the program stored in the memory 98.
  • the charging / discharging device 4 stores a program in which at least a part of the steps executed by the control unit 66 will be executed as a result.
  • the memory 98 is, for example, non-volatile such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (registered trademark) (Electrically Erasable Programmable Read-Only Memory).
  • non-volatile such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (registered trademark) (Electrically Erasable Programmable Read-Only Memory).
  • RAM Random Access Memory
  • ROM Read Only Memory
  • flash memory EPROM (Erasable Programmable Read Only Memory)
  • EEPROM registered trademark
  • it may be a volatile semiconductor memory, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD (Digital Versatile Disk), or the like.
  • FIG. 9 is a diagram showing a processing circuit 99 when at least a part of the control unit 66 included in the charging / discharging device 4 according to the first embodiment is realized by the processing circuit 99. That is, at least a part of the control unit 66 may be realized by the processing circuit 99.
  • the processing circuit 99 is dedicated hardware.
  • the processing circuit 99 is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof. Is.
  • control unit 66 may be dedicated hardware separate from the rest.
  • a part of the plurality of functions may be realized by software or firmware, and the rest of the plurality of functions may be realized by dedicated hardware.
  • the plurality of functions of the control unit 66 can be realized by hardware, software, firmware, or a combination thereof.
  • At least a part of the functions of the home controller 23 may be realized by a processor that executes a program stored in the memory.
  • the memory is a memory for storing a program in which at least a part of the steps executed by the home controller 23 is executed as a result, and is the same memory as the memory 98.
  • the processor is the same processor as the processor 97.
  • At least a part of the functions of the home controller 23 may be realized by a processing circuit.
  • the processing circuit is the same processing circuit as the processing circuit 99.
  • At least a part of the functions of the controller 25 in FIG. 2 may be realized by a processor that executes a program stored in the memory.
  • the memory is a memory for storing a program in which at least a part of the steps executed by the controller 25 is executed as a result, and is the same memory as the memory 98.
  • the processor is the same processor as the processor 97.
  • At least a part of the functions of the controller 25 may be realized by a processing circuit.
  • the processing circuit is the same processing circuit as the processing circuit 99.
  • the configuration shown in the above embodiments is an example, and can be combined with another known technique, can be combined with each other, and does not deviate from the gist. It is also possible to omit or change a part of the configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Un dispositif de charge/décharge (4) comprend : des unités de conversion de puissance (53, 54, 55) ayant une fonction de conversion de puissance en courant alternatif (CA) en puissance en courant continu (CC) et une fonction de conversion de puissance CC en puissance CA; un premier boîtier (41) qui est conducteur et qui protège électromagnétiquement les unités de conversion de puissance (53, 54, 55); des seconds boîtiers (4a, 4d, 4e) qui entourent le premier boîtier (41) et sont électriquement connectés au premier boîtier (41) pour protéger électromagnétiquement le premier boîtier (41) et les unités de conversion de puissance (53, 54, 55); une unité de connexion de puissance CA (70) qui est située entre le premier boîtier (41) et les seconds boîtiers (4a, 4d, 4e) et connecte la puissance CA aux unités de conversion de puissance (53, 54, 55); et des premiers filtres de bruit (71, 72) qui sont situés entre le premier boîtier (41) et les seconds boîtiers (4a, 4d, 4e) et connectés à l'unité de connexion de puissance CA (70) et au premier boîtier (41).
PCT/JP2020/024159 2020-06-19 2020-06-19 Dispositif de charge/décharge WO2021255924A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220153150A1 (en) * 2020-11-13 2022-05-19 Dana Automotive Systems Group, Llc Methods and systems for an emergency response unit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1051912A (ja) * 1996-08-01 1998-02-20 Hitachi Ltd 放熱フィンを有する電気装置
JP2014103166A (ja) * 2012-11-16 2014-06-05 Shindengen Electric Mfg Co Ltd 電子回路ユニット
US20160352187A1 (en) * 2014-02-05 2016-12-01 Grundfos Holding A/S Power converter
JP2019075917A (ja) * 2017-10-18 2019-05-16 三菱電機株式会社 電力変換装置
JP2019110643A (ja) * 2017-12-15 2019-07-04 株式会社豊田自動織機 充放電装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1051912A (ja) * 1996-08-01 1998-02-20 Hitachi Ltd 放熱フィンを有する電気装置
JP2014103166A (ja) * 2012-11-16 2014-06-05 Shindengen Electric Mfg Co Ltd 電子回路ユニット
US20160352187A1 (en) * 2014-02-05 2016-12-01 Grundfos Holding A/S Power converter
JP2019075917A (ja) * 2017-10-18 2019-05-16 三菱電機株式会社 電力変換装置
JP2019110643A (ja) * 2017-12-15 2019-07-04 株式会社豊田自動織機 充放電装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220153150A1 (en) * 2020-11-13 2022-05-19 Dana Automotive Systems Group, Llc Methods and systems for an emergency response unit
US11721988B2 (en) * 2020-11-13 2023-08-08 Dana Automotive Systems Group, Llc Methods and systems for an emergency response unit

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