WO2018090768A1 - 充放电装置 - Google Patents

充放电装置 Download PDF

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Publication number
WO2018090768A1
WO2018090768A1 PCT/CN2017/105825 CN2017105825W WO2018090768A1 WO 2018090768 A1 WO2018090768 A1 WO 2018090768A1 CN 2017105825 W CN2017105825 W CN 2017105825W WO 2018090768 A1 WO2018090768 A1 WO 2018090768A1
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WO
WIPO (PCT)
Prior art keywords
unit
energy storage
bidirectional
storage unit
conversion unit
Prior art date
Application number
PCT/CN2017/105825
Other languages
English (en)
French (fr)
Inventor
贺文涛
周岿
单浩仁
Original Assignee
华为技术有限公司
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.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP17872769.9A priority Critical patent/EP3534484B1/en
Publication of WO2018090768A1 publication Critical patent/WO2018090768A1/zh
Priority to US16/411,635 priority patent/US10847991B2/en

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    • H02J7/022—
    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0018—Circuits for equalisation of charge between batteries using separate charge circuits
    • 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
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • 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
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/0074—Plural converter units whose inputs are connected in series
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • Embodiments of the present invention relate to electronic circuit technologies, and in particular, to a charging and discharging device.
  • Charge and discharge devices have been widely used in the field of vehicles, communications, etc.
  • the current charging and discharging devices on many high-end electric vehicles include: three types of power conversion modules: vehicle charger, vehicle DCDC, and vehicle inverter. And AC charging and discharging sockets, high-voltage power batteries and low-pressure lead-acid batteries.
  • the vehicle-mounted inverter includes: an AC/DC conversion unit and a DC/DC isolation conversion unit, wherein the AC/DC conversion unit is One end is connected to the AC charging and discharging socket, and the second end of the AC/DC converting unit is connected to the first end of the DC/DC isolating conversion unit, and the second end of the DC/DC isolating conversion unit is connected to the high voltage power battery
  • the in-vehicle charger includes: an AC/DC conversion unit and a DC/DC isolation conversion unit.
  • the vehicle DCDC includes: a DC/DC boost conversion unit and a DC/DC isolation conversion unit, The first end of the DC/DC boost converter unit is connected to the high voltage power battery, and the first end of the DC/DC boost converter unit is isolated from the DC/DC A first end connected to the switching unit, the DC / DC isolation transformation unit is connected to the second end of the low-voltage lead-acid battery.
  • the charging and discharging device includes a large number of units, thereby causing a problem that the charging and discharging device and the electric vehicle in which the device is located are heavy in weight.
  • Embodiments of the present invention provide a charging and discharging device to reduce the weight of a charging and discharging device and the weight of a device in which the charging and discharging device is located.
  • An embodiment of the present invention provides a charging and discharging device, comprising: an AC charging and discharging unit, a bidirectional AC/DC converting unit, a bidirectional DC/DC isolation conversion unit, and a first energy storage unit, which are sequentially connected in series, the charging and discharging device further comprising: at least a switching unit, a DC/DC isolation conversion unit and a second energy storage unit, wherein the first end of each switching unit is connected to the bidirectional DC/DC isolation conversion unit, and the second end of each switching unit and the DC/DC isolation conversion unit a first end connection, the second end of the DC/DC isolation conversion unit is connected to the second energy storage unit;
  • each switching unit When the first energy storage unit is charged by the AC charging and discharging unit or the first energy storage unit charges the device to be charged through the AC charging and discharging unit, each switching unit is in an off state, and when the first energy storage unit is in the second state When the energy storage unit is charged, one of the at least one switching unit is in an on state.
  • the bidirectional AC/DC conversion unit, the bidirectional DC/DC isolation conversion unit and the DC/DC isolation conversion unit in the charging and discharging device replace the AC/DC conversion unit and the DC/included in the prior art vehicle inverter.
  • the DC isolation conversion unit and the on-board charger include: an AC/DC conversion unit and a vehicle DCDC including: a DC/DC isolation conversion unit, a DC/DC boost conversion unit, and a DC/DC isolation conversion unit.
  • the charging and discharging device not only realizes the functions of the vehicle-mounted inverter, the in-vehicle charger, and the on-board DCDC in the prior art, but also reduces the number of units included in the charging and discharging device compared to the prior art, thereby reducing the charging and discharging device.
  • the at least one switch unit is a first switch unit, the first end of the first switch unit is connected to the first end of the bidirectional DC/DC isolation conversion unit, and the second end of the first switch unit is isolated from the DC/DC The first end of the conversion unit is connected, wherein the first end of the bidirectional DC/DC isolation conversion unit is one end connected to the bidirectional AC/DC conversion unit;
  • the first switching unit When the voltage value of the first energy storage unit is less than the voltage threshold, the first switching unit is in an on state to enable the first energy storage unit to charge the second energy storage unit.
  • the first energy storage unit outputs high voltage direct current, and flows to the bidirectional DC/DC isolation conversion unit, and the bidirectional DC/DC isolation conversion unit can perform voltage conversion on the high voltage direct current and output the converted direct current to the direct current/
  • the DC isolation conversion unit and the DC/DC isolation conversion unit can further implement the step-down, and output the voltage-adjusted DC power to the second energy storage unit.
  • the at least one switch unit is a second switch unit, the first end of the second switch unit is connected to the second end of the bidirectional DC/DC isolation conversion unit, and the second end of the second switch unit is isolated from the DC/DC The first end of the conversion unit is connected, wherein the second end of the bidirectional DC/DC isolation conversion unit is an end connected to the first energy storage unit;
  • the second switching unit When the voltage value of the first energy storage unit is greater than or equal to the voltage threshold, the second switching unit is in an on state, so that the first energy storage unit charges the second energy storage unit.
  • the first energy storage unit outputs high-voltage direct current, and flows to the DC/DC isolation conversion unit, and the DC/DC isolation conversion unit can implement the voltage reduction, and outputs the voltage-adjusted direct current to the second energy storage unit.
  • the at least one switch unit is a first switch unit and a second switch unit, and the first end of the first switch unit is connected to the first end of the bidirectional DC/DC isolation conversion unit, where a second end of the switching unit is connected to the first end of the DC/DC isolation conversion unit, wherein the first end of the bidirectional DC/DC isolation conversion unit is an end connected to the bidirectional AC/DC conversion unit a first end of the second switch unit is connected to a second end of the bidirectional DC/DC isolation conversion unit, and a second end of the second switch unit is coupled to a first end of the DC/DC isolation conversion unit connection;
  • the first switching unit When the voltage value of the first energy storage unit is less than a voltage threshold, the first switching unit is in an on state, and the second switching unit is in an off state, so that the first energy storage unit is in a state Charging the second energy storage unit;
  • the first switching unit When the voltage value of the first energy storage unit is greater than or equal to the voltage threshold, the first switching unit is in an off state, and the second switching unit is in an on state, so that the first storage The energy unit charges the second energy storage unit.
  • the first option may be referred to, and details are not described herein; when the first switch unit is in the off state, the second switch unit is For the on state, refer to the second optional mode, and details are not described herein again.
  • the bidirectional AC/DC conversion unit is a bridgeless power factor correction PFC circuit.
  • the bidirectional DC/DC isolation conversion unit is a bidirectional resonant conversion circuit.
  • the DC/DC isolation conversion unit is an LLC circuit.
  • An embodiment of the present invention provides a charging and discharging device, comprising: an AC charging and discharging unit, a bidirectional AC/DC conversion unit, a bidirectional DC/DC isolation conversion unit, and a first energy storage unit connected in series, and the device further includes: at least one switch a unit, a DC/DC isolation conversion unit and a second energy storage unit, wherein the first end of each switching unit is connected to the bidirectional DC/DC isolation conversion unit, and the second end of each switching unit is coupled to the DC/DC isolation conversion unit a first end connection, the second end of the DC/DC isolation conversion unit is connected to the second energy storage unit; and when the first energy storage unit is charged or the first energy storage device by the AC charging and discharging unit When the unit charges the device to be charged through the AC charging and discharging unit, then each of the switching units is in an off state, and when the first energy storage unit charges the second energy storage unit, the at least One of the switching units is in an on state.
  • the charging and discharging device not only realizes the functions of the vehicle-mounted inverter, the vehicle-mounted charger, and the vehicle-mounted DCDC in the prior art, but also reduces the number of units included in the charging and discharging device compared with the prior art, thereby reducing the charging and discharging device. Weight and the weight of the equipment in which the device is located.
  • FIG. 1 is a schematic structural view of a charge and discharge device provided by the prior art
  • FIG. 2 is a schematic structural diagram of a charging and discharging device according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram 1 of current flow according to an embodiment of the present invention.
  • FIG. 4 is a second schematic diagram of current flow according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram 3 of current flow according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram 4 of current flow according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a charging and discharging device according to another embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a charging and discharging device according to still another embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a charging and discharging device according to still another embodiment of the present invention.
  • the charging and discharging device includes a large number of units, thereby causing a problem that the charging and discharging device and the electric vehicle in which the device is located are heavy.
  • Embodiments of the present invention provide a charging and discharging device.
  • FIG. 2 is a schematic structural diagram of a charging and discharging device according to an embodiment of the present invention.
  • the device includes: an AC charging and discharging unit, a bidirectional AC/DC conversion unit, and a bidirectional DC/DC isolation conversion in series. a unit and a first energy storage unit, the device further comprising: at least one switch unit (in FIG.
  • At least one switch unit is a first switch unit and a second switch unit as an example), a DC/DC isolation conversion unit and a second An energy storage unit, the first end of each switch unit is connected to the bidirectional DC/DC isolation conversion unit, and the second end of each switch unit is connected to the first end of the DC/DC isolation conversion unit, and the DC/DC isolation conversion unit is The second end is connected to the second energy storage unit;
  • each of the switching units When the first energy storage unit is charged by the AC charging and discharging unit or the first energy storage unit charges the device to be charged through the AC charging and discharging unit, each of the switching units is in an off state, when the first energy storage unit is When the second energy storage unit is charged, one of the at least one switching unit is in an on state.
  • FIG. 3 is a first schematic diagram of current flow according to an embodiment of the present invention.
  • the external alternating current of the electric vehicle passes through the AC charging and discharging unit and the bidirectional AC/DC. Transformation unit, A bidirectional DC/DC isolation conversion unit for charging the first energy storage unit.
  • the AC charging and discharging unit may be an AC charging and discharging socket or an AC charging and discharging interface;
  • the bidirectional AC/DC converting unit is configured to convert the input alternating current into direct current and output to the bidirectional DC/DC isolation conversion unit;
  • the DC/DC isolation conversion unit is configured to perform voltage conversion on the input DC power, and output the converted DC power to the first energy storage unit to charge the first energy storage unit, where the first energy storage unit may be a battery.
  • the first energy storage unit may be a battery.
  • it can be a high-voltage power battery.
  • FIG. 4 is a schematic diagram 2 of current flow according to an embodiment of the present invention.
  • the high voltage direct current of the first energy storage unit passes through a bidirectional DC/DC isolation conversion unit.
  • the bidirectional AC/DC conversion unit and the AC charging and discharging unit are configured to charge the device to be charged connected to the AC charging and discharging unit.
  • the bidirectional DC/DC isolation conversion unit is configured to perform voltage conversion on the DC high voltage DC power, and output the converted DC power to the bidirectional AC/DC conversion unit;
  • the bidirectional AC/DC conversion unit is configured to convert the input DC power It is an alternating current, and the alternating current is output to the alternating current charging and discharging unit to charge the device to be charged connected to the alternating current charging and discharging unit.
  • the charging and discharging device charges the device to be charged, it is equivalent to realizing the process of charging the device to be charged by the in-vehicle inverter in the prior art.
  • FIG. 5 is a schematic diagram 3 of current flow according to an embodiment of the present invention. As shown in FIG. 5, the first energy storage unit outputs high voltage direct current, and the high voltage direct current is passed. The first switching unit flows to the DC/DC isolation conversion unit, and the DC/DC isolation conversion unit is configured to convert the high voltage direct current into a low voltage direct current and output the low voltage direct current to the second energy storage unit.
  • FIG. 6 is a schematic diagram 4 of current flow according to an embodiment of the present invention. As shown in FIG. 6 , the first energy storage unit outputs high voltage direct current, and the high voltage direct current flows to the DC/DC isolation conversion unit through the second switching unit, and DC/DC isolation.
  • the transform unit is configured to convert the high voltage direct current into a low voltage direct current and output the low voltage direct current to the second energy storage unit.
  • the embodiment of the invention provides a charging and discharging device, wherein the bidirectional AC/DC conversion unit, the bidirectional DC/DC isolation conversion unit and the DC/DC isolation conversion unit in the charging and discharging device replace the prior art vehicle inverter system.
  • AC/DC converter unit and DC/DC isolation converter unit including: AC/DC converter unit and vehicle DCDC included: DC/DC isolation converter unit and DC/DC boost converter unit and
  • DC/DC isolating conversion unit reduces the number of units included in the charging and discharging device, thereby reducing the weight of the charging and discharging device and the weight of the device in which the device is located.
  • FIG. 7 is a schematic structural diagram of a charge and discharge device according to another embodiment of the present invention. As shown in FIG. One end is connected to the first end of the bidirectional DC/DC isolation conversion unit, and the second end of the first switching unit is connected to the first end of the DC/DC isolation conversion unit, wherein the first end of the bidirectional DC/DC isolation conversion unit An end connected to the bidirectional AC/DC conversion unit; when the voltage value of the first energy storage unit is less than a voltage threshold, the first switching unit is in an on state to enable the first energy storage unit to charge the second energy storage unit .
  • the first energy storage unit outputs high voltage direct current, and flows to the bidirectional DC/DC isolation conversion unit
  • the bidirectional DC/DC isolation conversion unit can perform voltage conversion on the high voltage direct current and output the converted direct current to the direct current/
  • the DC isolation conversion unit and the DC/DC isolation conversion unit can further implement the step-down, and output the voltage-adjusted DC power to the second energy storage unit.
  • the voltage threshold can be set according to actual conditions.
  • FIG. 8 is a schematic structural diagram of a charge and discharge device according to another embodiment of the present invention. As shown in FIG. One end is connected to the second end of the bidirectional DC/DC isolation conversion unit, and the second end of the second switching unit is connected to the first end of the DC/DC isolation conversion unit, wherein the second end of the bidirectional DC/DC isolation conversion unit An end connected to the first energy storage unit; when the voltage value of the first energy storage unit is greater than or equal to the voltage threshold, the second switching unit is in an on state, so that the first energy storage unit is to the second energy storage unit Charging.
  • the first energy storage unit outputs high-voltage direct current, and flows to the DC/DC isolation conversion unit, and the DC/DC isolation conversion unit can implement the voltage reduction, and outputs the voltage-adjusted direct current to the second energy storage unit.
  • At least one switch unit is a first switch unit and a second switch unit, and the first end of the first switch unit and the first end of the bidirectional DC/DC isolation conversion unit Connecting, the second end of the first switch unit is connected to the first end of the DC/DC isolation conversion unit, wherein the first end of the bidirectional DC/DC isolation conversion unit is one end connected to the bidirectional AC/DC conversion unit, and the second The first end of the switch unit is connected to the second end of the bidirectional DC/DC isolation conversion unit, and the second end of the second switch unit is connected to the first end of the DC/DC isolation conversion unit; when the voltage value of the first energy storage unit is When the voltage threshold is less than the voltage threshold, the first switching unit is in an on state, and the second switching unit is in an off state, so that the first energy storage unit charges the second energy storage unit; when the voltage value of the first energy storage unit is greater than or When the voltage threshold is equal to the voltage threshold, the first switching unit is in an off state, and the second
  • the first option when the first switch unit is in the on state and the second switch unit is in the off state, the first option may be referred to, and details are not described herein;
  • the second switch unit when the second switch unit is in the on state, the second optional mode may be referred to, and details are not described herein again.
  • the bidirectional DC/DC isolation conversion unit since the bidirectional DC/DC isolation conversion unit has the function of adjusting the voltage, when the first energy storage unit charges the second energy storage unit, the high voltage direct current output by the first energy storage unit passes through the bidirectional DC. / DC isolation converter unit or without bidirectional DC / DC isolation converter unit, will generate DC current with different voltage values, so the voltage supplied to the second energy storage unit is also different.
  • the bidirectional AC/DC conversion unit is a Bridgeless Power Factor Correction (PFC) circuit.
  • PFC Bridgeless Power Factor Correction
  • the bidirectional DC/DC isolation conversion unit is a bidirectional resonant conversion circuit.
  • the DC/DC isolation conversion unit is an LLC circuit.
  • FIG. 9 is a schematic structural diagram of a charging and discharging device according to another embodiment of the present invention.
  • the device includes: an AC charging and discharging unit connected in series, a bidirectional AC/DC conversion unit, and a bidirectional
  • the DC/DC isolation conversion unit and the first energy storage unit further include: a first switch unit and a second switch unit, a DC/DC isolation conversion unit, and a second energy storage unit, the first end of the first switch unit and the bidirectional The first end of the DC/DC isolation conversion unit is connected, and the second end of the first switching unit is connected to the first end of the DC/DC isolation conversion unit, wherein the first end of the bidirectional DC/DC isolation conversion unit is in two-way communication One end of the DC/DC conversion unit is connected, the first end of the second switch unit is connected to the second end of the bidirectional DC/DC isolation conversion unit, and the second end of the second switch unit is connected to the first end of the DC/DC isolation conversion unit When the voltage value of the first energy
  • the bidirectional AC/DC conversion unit includes: switch tubes S7, S8, S9, S10, S11 and S12, AC power supply Vac, inductor La, inductor Lb, wherein S7 and S8 are connected in series, S9 and S10 are connected in series, and S11 and S12 are connected in series.
  • the series circuit composed of S7 and S8 is connected in parallel with the series circuit composed of S9 and S10 and the series circuit composed of S11 and S12.
  • One end of the AC power supply Vac is connected to S11, the other end is connected to the inductor La, and the AC power supply Vac is also connected to the AC charging and discharging unit.
  • Connection, the other end of La is connected to the series circuit composed of S7 and S8, one end of Lb is connected with La, and the other end is connected to the series circuit composed of S9 and S10;
  • the bidirectional DC/DC isolation conversion unit comprises: a series connection switch tube S1-S6, a capacitor Cp, wherein one end of the capacitor Cp is connected with the anode of the bus line, and the other end is connected with the cathode of the bus line; the bidirectional DC/DC isolation conversion unit further comprises: The switch tube Sr1-Sr6, the capacitor Cs1, wherein one end of the capacitor Cs1 is connected to the anode of the first energy storage unit, and the other end is connected to the cathode of the first energy storage unit; further comprising: three three-port multi-element resonators and three transformers T1, T2 and T3, wherein the first end of the multi-element resonant cavity 1 is connected between S1 and S2, the second end of the multi-element resonant cavity 1 is connected to the negative electrode of the bus bar, and the third end of the multi-element resonant cavity 1 is The primary winding of T1 is connected, and the secondary winding of T1 is connected between Sr
  • the negative pole is connected, the third end of the multi-element resonator 2 is connected to the T2 primary winding, the secondary winding of T2 is connected between Sr3 and Sr4; the first end of the multi-element resonant cavity 3 is connected between S5 and S6, The second end of the multi-element resonator 3 and the negative electrode of the bus bar Connected, the third end of the multi-element resonator 3 is connected to the T3 primary winding, and the secondary winding of T3 is connected between Sr5 and Sr6.
  • the DC/DC isolation conversion unit includes: switch tubes Sd1-Sd4, inductor Lr, capacitor Cr and capacitor Cs2, and transformer T4, wherein Sd1 and Sd2 are connected in series, one end of Lr is connected between Sd1 and Sd2, and the other end is connected with Cr, Cr The other end is connected to one end of the T4 primary winding, the other end of the T4 primary winding is connected to Sd2, the first end of the T4 secondary winding is connected to Sd3, the second end is connected to Sd4, and the third end is connected to Cs2;
  • the first switching unit comprises two switching tubes, and the second switching unit also comprises two switching tubes.
  • the switch tube may be an insulated gate bipolar transistor (IGBT), a metal oxide semiconductor field effect transistor (MOSFET), or the like.
  • IGBT insulated gate bipolar transistor
  • MOSFET metal oxide semiconductor field effect transistor
  • the embodiment of the invention provides a charging and discharging device, wherein the bidirectional AC/DC conversion unit, the bidirectional DC/DC isolation conversion unit and the DC/DC isolation conversion unit in the charging and discharging device replace the prior art vehicle inverter system.
  • AC/DC converter unit and DC/DC isolation converter unit including: AC/DC converter unit and vehicle DCDC included: DC/DC isolation converter unit and DC/DC boost converter unit and
  • DC/DC isolating conversion unit reduces the number of units included in the charging and discharging device, thereby reducing the weight of the charging and discharging device and the weight of the device in which the device is located.

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  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Dc-Dc Converters (AREA)

Abstract

本发明提供一种充放电装置，包括：依次串联的交流充放电单元、双向交流/直流变换单元、双向直流/直流隔离变换单元和第一储能单元，还包括：至少一个开关单元、直流/直流隔离变换单元和第二储能单元，每个开关单元的第一端与双向直流/直流隔离变换单元连接，每个开关单元的第二端与直流/直流隔离变换单元的第一端连接，直流/直流隔离变换单元的第二端与第二储能单元连接；当通过交流充放电单元向第一储能单元充电或者第一储能单元通过交流充放电单元向待充电设备充电时，则每个开关单元为断开状态，当第一储能单元向第二储能单元充电时，则至少一个开关单元中的一个开关单元为导通状态。从而减少了充放电装置以及该装置所在设备的重量。

Description

充放电装置
本申请要求于2016年11月15日提交中国专利局、申请号为201611026863.1、申请名称为“充放电装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明实施例涉及电子电路技术，尤其涉及一种充放电装置。
背景技术
充放电装置在车载、通讯等领域得到了广泛的应用，例如：在车载领域中，目前许多高端电动车上的充放电装置包括：车载充电机、车载DCDC、车载逆变器三种功率变换模块以及交流充放电插座、高压动力电池和低压铅酸电池。
图1为现有技术提供的充放电装置的结构示意图，如图1所示，车载逆变器包括：交流/直流变换单元和直流/直流隔离变换单元，其中，该交流/直流变换单元的第一端与该交流充放电插座连接，该交流/直流变换单元的第二端与该直流/直流隔离变换单元的第一端连接，该直流/直流隔离变换单元的第二端与高压动力电池连接；车载充电机包括：交流/直流变换单元和直流/直流隔离变换单元，同样地，该交流/直流变换单元的第一端与该交流充放电插座连接，该交流/直流变换单元的第二端与该直流/直流隔离变换单元的第一端连接，该直流/直流隔离变换单元的第二端与高压动力电池连接；车载DCDC包括：直流/直流升压变换单元和直流/直流隔离变换单元，直流/直流升压变换单元的第一端与高压动力电池连接,直流/直流升压变换单元的第一端与该直流/直流隔离变换单元的第一端连接，直流/直流隔离变换单元的第二端与低压铅酸电池连接。
然而，现有技术中充放电装置包括的单元较多，从而造成充放电装置以及该装置所在的电动车等设备的重量较重的问题。
发明内容
本发明实施例提供一种充放电装置，以降低充放电装置的重量，以及充放电装置所在设备的重量。
本发明实施例提供一种充放电装置，包括：依次串联的交流充放电单元、双向交流/直流变换单元、双向直流/直流隔离变换单元和第一储能单元，该充放电装置还包括：至少一个开关单元、直流/直流隔离变换单元和第二储能单元，每个开关单元的第一端与双向直流/直流隔离变换单元连接，每个开关单元的第二端与直流/直流隔离变换单元的第一端连接，直流/直流隔离变换单元的第二端与第二储能单元连接；
当通过交流充放电单元向第一储能单元充电或者第一储能单元通过交流充放电单元向待充电设备充电时，则每个开关单元为断开状态，当第一储能单元向第二储能单元充电时，则至少一个开关单元中的一个开关单元为导通状态。
由于该充放电装置中的双向交流/直流变换单元、双向直流/直流隔离变换单元和直流/直流隔离变换单元替代了现有技术中车载逆变器所包括的：交流/直流变换单元和直流/直流隔离变换单元，以及车载充电机所包括的：交流/直流变换单元和车载DCDC所包括的：直流/直流隔离变换单元以及直流/直流升压变换单元和直流/直流隔离变换单元。因此该充放电装置不仅实现了现有技术中车载逆变器、车载充电机以及车载DCDC的功能，而且相对于现有技术该充放电装置所包括的单元数减少了，从而减少了充放电装置的重量以及该装置所在设备的重量。
可选地，至少一个开关单元为一个第一开关单元，第一开关单元的第一端与双向直流/直流隔离变换单元的第一端连接，第一开关单元的第二端与直流/直流隔离变换单元的第一端连接，其中，双向直流/直流隔离变换单元的第一端为与双向交流/直流变换单元连接的一端；
当第一储能单元的电压值小于电压阈值时，则第一开关单元为导通状态，以使第一储能单元向第二储能单元充电。
这种情况下，第一储能单元输出高压直流电，流向双向直流/直流隔离变换单元，该双向直流/直流隔离变换单元可以对高压直流电进行电压变换，并将变换后的直流电输出至该直流/直流隔离变换单元，直流/直流隔离变换单元进一步也可以实现降压，将经过电压调整后的直流电输出至第二储能单元。
可选地，至少一个开关单元为一个第二开关单元，第二开关单元的第一端与双向直流/直流隔离变换单元的第二端连接，第二开关单元的第二端与直流/直流隔离变换单元的第一端连接，其中，所述双向直流/直流隔离变换单元的第二端为与第一储能单元连接的一端；
当所述第一储能单元的电压值大于或者等于电压阈值时，则所述第二开关单元为导通状态，以使所述第一储能单元向所述第二储能单元充电。
这种情况下，第一储能单元输出高压直流电，流向直流/直流隔离变换单元，直流/直流隔离变换单元可以实现降压，将经过电压调整后的直流电输出至第二储能单元。
可选地，至少一个开关单元为一个第一开关单元和一个第二开关单元，所述第一开关单元的第一端与所述双向直流/直流隔离变换单元的第一端连接，所述第一开关单元的第二端与所述直流/直流隔离变换单元的第一端连接，其中，所述双向直流/直流隔离变换单元的第一端为与所述双向交流/直流变换单元连接的一端，所述第二开关单元的第一端与所述双向直流/直流隔离变换单元的第二端连接，所述第二开关单元的第二端与所述直流/直流隔离变换单元的第一端连接；
当所述第一储能单元的电压值小于电压阈值时，则所述第一开关单元为导通状态，所述第二开关单元为断开状态，以使所述第一储能单元向所述第二储能单元充电；
当所述第一储能单元的电压值大于或者等于所述电压阈值时，则所述第一开关单元为断开状态，所述第二开关单元为导通状态，以使所述第一储能单元向所述第二储能单元充电。
当第一开关单元为导通状态，第二开关单元为断开状态时，可参考第一种可选方式，在此不再赘述；当第一开关单元为断开状态，第二开关单元为导通状态时，可参考第二种可选方式，在此不再赘述。
可选地，所述双向交流/直流变换单元为无桥功率因数校正PFC电路。
可选地，所述双向直流/直流隔离变换单元为双向谐振变换电路。
可选地，所述直流/直流隔离变换单元为LLC电路。
本发明实施例提供一种充放电装置，包括：依次串联的交流充放电单元、双向交流/直流变换单元、双向直流/直流隔离变换单元和第一储能单元，该装置还包括：至少一个开关单元、直流/直流隔离变换单元和第二储能单元，每个开关单元的第一端与双向直流/直流隔离变换单元连接，每个开关单元的第二端与所述直流/直流隔离变换单元的第一端连接，直流/直流隔离变换单元的第二端与所述第二储能单元连接；当通过所述交流充放电单元向所述第一储能单元充电或者所述第一储能单元通过所述交流充放电单元向待充电设备充电时，则所述每个开关单元为断开状态，当所述第一储能单元向所述第二储能单元充电时，则所述至少一个开关单元中的一个开关单元为导通状态。该充放电装置不仅实现了现有技术中车载逆变器、车载充电机以及车载DCDC的功能，而且相对于现有技术该充放电装置所包括的单元数减少了，从而减少了充放电装置的重量以及该装置所在设备的重量。
附图说明
图1为现有技术提供的充放电装置的结构示意图；
图2为本发明一实施例提供的一种充放电装置的结构示意图；
图3为本发明一实施例提供的电流流向示意图一；
图4为本发明一实施例提供的电流流向示意图二；
图5为本发明一实施例提供的电流流向示意图三；
图6为本发明一实施例提供的电流流向示意图四；
图7为本发明另一实施例提供的一种充放电装置的结构示意图；
图8为本发明再一实施例提供的一种充放电装置的结构示意图；
图9为本发明又一实施例提供的一种充放电装置的结构示意图。
具体实施方式
针对现有技术中充放电装置包括的单元较多，从而造成充放电装置以及该装置所在的电动车等设备的重量较重的问题。本发明实施例提供一种充放电装置。
图2为本发明一实施例提供的一种充放电装置的结构示意图，如图2所示，该装置包括：依次串联的交流充放电单元、双向交流/直流变换单元、双向直流/直流隔离变换单元和第一储能单元，该装置还包括：至少一个开关单元(图2中以至少一个开关单元为一个第一开关单元和第二开关单元为例)、直流/直流隔离变换单元和第二储能单元，每个开关单元的第一端与双向直流/直流隔离变换单元连接，每个开关单元的第二端与直流/直流隔离变换单元的第一端连接，直流/直流隔离变换单元的第二端与第二储能单元连接；
当通过交流充放电单元向第一储能单元充电或者所述第一储能单元通过交流充放电单元向待充电设备充电时，则每个开关单元为断开状态，当第一储能单元向第二储能单元充电时，则至少一个开关单元中的一个开关单元为导通状态。
示例性的，当该充放电装置应用于电动车时，图3为本发明一实施例提供的电流流向示意图一，如图3所示，电动车外部交流电经过交流充放电单元、双向交流/直流变换单元、 双向直流/直流隔离变换单元，以实现对第一储能单元充电。可选地，该交流充放电单元可以为交流充放电插座或者交流充放电接口等；双向交流/直流变换单元用于将输入的交流电转换为直流电，并输出至双向直流/直流隔离变换单元；双向直流/直流隔离变换单元用于对输入的直流电进行电压变换，并将转换后的直流电输出至第一储能单元，以实现向第一储能单元充电，该第一储能单元可以是电池，例如：可以是高压动力电池。综上，当充放电装置在向第一储能单元充电时，则相当于实现了现有技术中通过车载充电机向高压动力电池充电的过程。
充放电装置向待充电设备的充电过程为：图4为本发明一实施例提供的电流流向示意图二，如图4所示，第一储能单元的高压直流电经过双向直流/直流隔离变换单元、双向交流/直流变换单元、交流充放电单元，以实现对与交流充放电单元连接的待充电设备充电。可选地，双向直流/直流隔离变换单元用于对直流高压直流电进行电压变换，并将变换后的直流电输出至双向交流/直流变换单元；该双向交流/直流变换单元用于将输入的直流电转换为交流电，并将该交流电输出至交流充放电单元，以实现对与交流充放电单元连接的待充电设备充电。综上，当充放电装置向待充电设备充电时，则相当于实现了现有技术中通过车载逆变器向待充电设备充电的过程。
第一储能单元向第二储能单元的充电过程为：图5为本发明一实施例提供的电流流向示意图三，如图5所示，第一储能单元输出高压直流电，该高压直流电经过第一开关单元流向直流/直流隔离变换单元，直流/直流隔离变换单元用于将高压直流电转换成低压直流电，并将该低压直流电输出至第二储能单元。图6为本发明一实施例提供的电流流向示意图四，如图6所示，第一储能单元输出高压直流电，该高压直流电经过第二开关单元流向直流/直流隔离变换单元，直流/直流隔离变换单元用于将高压直流电转换成低压直流电，并将该低压直流电输出至第二储能单元。综上，当第一储能单元向第二储能单元的充电时，则相当于实现了现有技术中通过车载DCDC的功能。
本发明实施例提供一种充放电装置，由于该充放电装置中的双向交流/直流变换单元、双向直流/直流隔离变换单元和直流/直流隔离变换单元替代了现有技术中车载逆变器所包括的：交流/直流变换单元和直流/直流隔离变换单元，车载充电机所包括的：交流/直流变换单元和车载DCDC所包括的：直流/直流隔离变换单元以及直流/直流升压变换单元和直流/直流隔离变换单元，相对于现有技术，充放电装置所包括的单元数减少了，从而减少了充放电装置的重量以及该装置所在设备的重量。
第一种可选方式，至少一个开关单元为一个第一开关单元，图7为本发明另一实施例提供的一种充放电装置的结构示意图，如图7所示，第一开关单元的第一端与双向直流/直流隔离变换单元的第一端连接，第一开关单元的第二端与直流/直流隔离变换单元的第一端连接，其中，双向直流/直流隔离变换单元的第一端为与双向交流/直流变换单元连接的一端；当第一储能单元的电压值小于电压阈值时，则第一开关单元为导通状态，以使第一储能单元向第二储能单元充电。这种情况下，第一储能单元输出高压直流电，流向双向直流/直流隔离变换单元，该双向直流/直流隔离变换单元可以对高压直流电进行电压变换，并将变换后的直流电输出至该直流/直流隔离变换单元，直流/直流隔离变换单元进一步也可以实现降压，将经过电压调整后的直流电输出至第二储能单元。需要说明的是，该电压阈值可以根据实际情况设置。
第二种可选方式，至少一个开关单元为一个第二开关单元，图8为本发明再一实施例提供的一种充放电装置的结构示意图，如图8所示，第二开关单元的第一端与双向直流/直流隔离变换单元的第二端连接，第二开关单元的第二端与直流/直流隔离变换单元的第一端连接，其中，双向直流/直流隔离变换单元的第二端为与第一储能单元连接的一端；当第一储能单元的电压值大于或者等于电压阈值时，则第二开关单元为导通状态，以使第一储能单元向第二储能单元充电。这种情况下，第一储能单元输出高压直流电，流向直流/直流隔离变换单元，直流/直流隔离变换单元可以实现降压，将经过电压调整后的直流电输出至第二储能单元。
第三种可选方式，如图2所示，至少一个开关单元为一个第一开关单元和一个第二开关单元，第一开关单元的第一端与双向直流/直流隔离变换单元的第一端连接，第一开关单元的第二端与直流/直流隔离变换单元的第一端连接，其中，双向直流/直流隔离变换单元的第一端为与双向交流/直流变换单元连接的一端，第二开关单元的第一端与双向直流/直流隔离变换单元的第二端连接，第二开关单元的第二端与直流/直流隔离变换单元的第一端连接；当第一储能单元的电压值小于电压阈值时，则第一开关单元为导通状态，第二开关单元为断开状态，以使第一储能单元向第二储能单元充电；当第一储能单元的电压值大于或者等于电压阈值时，则第一开关单元为断开状态，第二开关单元为导通状态，以使第一储能单元向第二储能单元充电。需要说明的是，这种情况下，当第一开关单元为导通状态，第二开关单元为断开状态时，可参考第一种可选方式，在此不再赘述；当第一开关单元为断开状态，第二开关单元为导通状态时，可参考第二种可选方式，在此不再赘述。
本发明实施例中，由于双向直流/直流隔离变换单元具有调整电压的功能，因此当第一储能单元向第二储能单元的充电时，第一储能单元所输出的高压直流电经过双向直流/直流隔离变换单元或者不经过双向直流/直流隔离变换单元，会产生具有不同的电压值的直流电流，从而向第二储能单元所提供的电压也不同。
可选地，双向交流/直流变换单元为无桥功率因数校正(Power Factor Correction，简称PFC)电路。
可选地，双向直流/直流隔离变换单元为双向谐振变换电路。
可选地，直流/直流隔离变换单元为LLC电路。
示例性的，图9为本发明又一实施例提供的一种充放电装置的结构示意图，如图9所示，该装置包括：依次串联的交流充放电单元、双向交流/直流变换单元、双向直流/直流隔离变换单元和第一储能单元，还包括：一个第一开关单元和第二开关单元、直流/直流隔离变换单元和第二储能单元，第一开关单元的第一端与双向直流/直流隔离变换单元的第一端连接，第一开关单元的第二端与直流/直流隔离变换单元的第一端连接，其中，双向直流/直流隔离变换单元的第一端为与双向交流/直流变换单元连接的一端，第二开关单元的第一端与双向直流/直流隔离变换单元的第二端连接，第二开关单元的第二端与直流/直流隔离变换单元的第一端连接；当第一储能单元的电压值小于电压阈值时，则第一开关单元为导通状态，第二开关单元为断开状态，以使第一储能单元向第二储能单元充电；当第一储能单元的电压值大于或者等于电压阈值时，则第一开关单元为断开状态，第二开关单元为导通状态，以使第一储能单元向第二储能单元充电，直流/直流隔离变换单元的第二端与第二储能单元连接；
其中，双向交流/直流变换单元包括：开关管S7、S8、S9、S10、S11和S12，交流电源Vac，电感La、电感Lb，其中S7、S8串联，S9、S10串联，S11、S12串联，S7、S8组成的串联电路与S9、S10组成的串联电路以及S11、S12组成的串联电路并联，交流电源Vac一端与S11连接，另一端与电感La连接，并且交流电源Vac还与交流充放电单元连接，La的另一端接在S7、S8组成的串联电路上，Lb的一端与La连接，另一端接在S9、S10组成的串联电路上；
双向直流/直流隔离变换单元包括：串联的开关管S1-S6，电容Cp，其中电容Cp一端与母线的正极连接，另一端与母线的负极连接；双向直流/直流隔离变换单元还包括：串联的开关管Sr1-Sr6，电容Cs1，其中电容Cs1一端与第一储能单元的正极连接，另一端与第一储能单元的负极连接；还包括：三个三端口多元件谐振腔以及三个变压器T1、T2和T3，其中，多元件谐振腔1的第一端连接在S1和S2之间，多元件谐振腔1的第二端与母线的负极连接，多元件谐振腔1的第三端与T1原边绕组连接，T1的副边绕组连接在Sr1和Sr2之间；同样的，多元件谐振腔2的第一端连接在S3和S4之间，多元件谐振腔2的第二端与母线的负极连接，多元件谐振腔2的第三端与T2原边绕组连接，T2的副边绕组连接在Sr3和Sr4之间；多元件谐振腔3的第一端连接在S5和S6之间，多元件谐振腔3的第二端与母线的负极连接，多元件谐振腔3的第三端与T3原边绕组连接，T3的副边绕组连接在Sr5和Sr6之间。
直流/直流隔离变换单元包括：开关管Sd1-Sd4，电感Lr、电容Cr和电容Cs2、变压器T4，其中Sd1和Sd2串联，Lr的一端连接在Sd1和Sd2之间，另一端与Cr连接，Cr的另一端与T4原边绕组的一端连接，T4原边绕组的另一端与Sd2连接，T4副边绕组的第一端与Sd3连接，第二端与Sd4连接，第三端与Cs2连接；
第一开关单元包括两个开关管，第二开关单元同样包括两个开关管。
可选地，上述开关管可以是绝缘栅双极型晶体管(Insulated Gate Bipolar Transistor，简称IGBT)、金属氧化物半导体场效应晶体管(Metal Oxide Semiconductor Field Effect Transistor，简称MOSFET)等。
本发明实施例提供一种充放电装置，由于该充放电装置中的双向交流/直流变换单元、双向直流/直流隔离变换单元和直流/直流隔离变换单元替代了现有技术中车载逆变器所包括的：交流/直流变换单元和直流/直流隔离变换单元，车载充电机所包括的：交流/直流变换单元和车载DCDC所包括的：直流/直流隔离变换单元以及直流/直流升压变换单元和直流/直流隔离变换单元，相对于现有技术，充放电装置所包括的单元数减少了，从而减少了充放电装置的重量以及该装置所在设备的重量。

Claims (7)

  1. 一种充放电装置，其特征在于，包括：依次串联的交流充放电单元、双向交流/直流变换单元、双向直流/直流隔离变换单元和第一储能单元，所述装置还包括：至少一个开关单元、直流/直流隔离变换单元和第二储能单元，每个开关单元的第一端与所述双向直流/直流隔离变换单元连接，所述每个开关单元的第二端与所述直流/直流隔离变换单元的第一端连接，所述直流/直流隔离变换单元的第二端与所述第二储能单元连接；
    当通过所述交流充放电单元向所述第一储能单元充电或者所述第一储能单元通过所述交流充放电单元向待充电设备充电时，则所述每个开关单元为断开状态，当所述第一储能单元向所述第二储能单元充电时，则所述至少一个开关单元中的一个开关单元为导通状态。
  2. 根据权利要求1所述的充放电装置，其特征在于，所述至少一个开关单元为一个第一开关单元，所述第一开关单元的第一端与所述双向直流/直流隔离变换单元的第一端连接，所述第一开关单元的第二端与所述直流/直流隔离变换单元的第一端连接，其中，所述双向直流/直流隔离变换单元的第一端为与所述双向交流/直流变换单元连接的一端；
    当所述第一储能单元的电压值小于电压阈值时，则所述第一开关单元为导通状态，以使所述第一储能单元向所述第二储能单元充电。
  3. 根据权利要求1所述充放电装置，其特征在于，所述至少一个开关单元为一个第二开关单元，所述第二开关单元的第一端与所述双向直流/直流隔离变换单元的第二端连接，所述第二开关单元的第二端与所述直流/直流隔离变换单元的第一端连接，其中，所述双向直流/直流隔离变换单元的第二端为与所述第一储能单元连接的一端；
    当所述第一储能单元的电压值大于或者等于电压阈值时，则所述第二开关单元为导通状态，以使所述第一储能单元向所述第二储能单元充电。
  4. 根据权利要求1所述的充放电装置，其特征在于，所述至少一个开关单元为一个第一开关单元和一个第二开关单元，所述第一开关单元的第一端与所述双向直流/直流隔离变换单元的第一端连接，所述第一开关单元的第二端与所述直流/直流隔离变换单元的第一端连接，其中，所述双向直流/直流隔离变换单元的第一端为与所述双向交流/直流变换单元连接的一端，所述第二开关单元的第一端与所述双向直流/直流隔离变换单元的第二端连接，所述第二开关单元的第二端与所述直流/直流隔离变换单元的第一端连接；
    当所述第一储能单元的电压值小于电压阈值时，则所述第一开关单元为导通状态，所述第二开关单元为断开状态，以使所述第一储能单元向所述第二储能单元充电；
    当所述第一储能单元的电压值大于或者等于所述电压阈值时，则所述第一开关单元为断开状态，所述第二开关单元为导通状态，以使所述第一储能单元向所述第二储能单元充电。
  5. 根据权利要求1-4任一项所述的充放电装置，其特征在于，所述双向交流/直流变换单元为无桥功率因数校正PFC电路。
  6. 根据权利要求1-5任一项所述的充放电装置，其特征在于，所述双向直流/直流隔离变换单元为双向谐振变换电路。
  7. 根据权利要求1-6任一项所述的充放电装置，其特征在于，所述直流/直流隔离变换 单元为LLC电路。
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