CN106786993B - Charge and discharge equipment and mobile charging vehicle comprising same - Google Patents

Charge and discharge equipment and mobile charging vehicle comprising same Download PDF

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Publication number
CN106786993B
CN106786993B CN201710089566.XA CN201710089566A CN106786993B CN 106786993 B CN106786993 B CN 106786993B CN 201710089566 A CN201710089566 A CN 201710089566A CN 106786993 B CN106786993 B CN 106786993B
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Prior art keywords
direct current
contactor
module
battery pack
electrically connected
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CN106786993A (en
Inventor
徐红刚
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NIO Co Ltd
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NIO Co Ltd
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Priority to CN201710089566.XA priority Critical patent/CN106786993B/en
Publication of CN106786993A publication Critical patent/CN106786993A/en
Priority to PCT/CN2017/104978 priority patent/WO2018149152A1/en
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    • 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
    • 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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • 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
    • 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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to a charging and discharging device and a mobile charging vehicle comprising the same, and aims to increase the type of a power supply for supplementing power to a battery pack and improve the diversity of charging for an object to be charged. To this end, the charge and discharge device of the present invention includes: a battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged; an inverter module capable of selectively operating in an AC/DC mode in which an input terminal thereof is connected to an external alternating current power source and an output terminal thereof is connected to the battery pack or the object to be charged, so as to convert alternating current of the external alternating current power source into direct current and thus charge the battery pack or the object to be charged; in the DC/DC mode, the input end of the charging device is connected to the battery pack, and the output end of the charging device is connected to the object to be charged, so that the battery pack charges the object to be charged. The charging and discharging equipment can charge the object to be charged by adopting the battery pack and an external alternating current power supply, so that the diversity of charging the object to be charged is realized.

Description

Charge and discharge equipment and mobile charging vehicle comprising same
Technical Field
The invention relates to the field of mobile charging and discharging, in particular to charging and discharging equipment and a mobile charging vehicle comprising the same.
Background
In recent years, the electric vehicle industry has been rapidly developed, and the popularity of electric vehicles has rapidly increased. However, charging of the electric vehicle is not as convenient as refueling of a fuel vehicle, and the density of an alternating current charging pile, a direct current charging pile or an electric vehicle power exchanging station is not as high as that of a gas station. In the driving process of the electric automobile, if the remaining electric quantity cannot support the mileage of the electric automobile, the electric automobile consumes electricity in the travel, and the electric automobile needs to be charged in time.
In an area where an ac charging pile, a dc charging pile, or an electric vehicle charging station is not constructed, an electric vehicle is generally charged by using a mobile charging vehicle. However, at present, the mobile charging vehicle generally utilizes the direct current charging pile to supplement power, and the mobile charging vehicle cannot charge the electric vehicle while supplementing power.
Therefore, how to increase the types of the power supply for charging the battery pack of the mobile charging car and improve the diversity of charging the object to be charged becomes an important problem to be solved urgently in the development process of the electric car industry. In view of the above, the present invention is particularly proposed.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problems of increasing the types of power supplies for supplying power to the battery pack and improving the diversity of charging for objects to be charged, the present invention provides a charging and discharging device and a mobile charging cart including the same.
In order to achieve the above object, according to one aspect of the present invention, there is provided a charge and discharge device including: a first battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged; a first converter module selectively operable in an AC/DC mode or a DC/DC mode; in the AC/DC mode, an input terminal of the first converter module is connected to an external alternating current power source, and an output terminal of the first converter module is connected to the first battery pack or the first object to be charged, so as to convert alternating current power of the external alternating current power source into direct current and thus charge the first battery pack or charge the first object to be charged; in the DC/DC mode, an input terminal of the first inverter module is connected to the first battery pack, and an output terminal of the first inverter module is connected to a first object to be charged, so that the first battery pack charges the first object to be charged.
In a preferred embodiment of the above charging and discharging apparatus, the charging and discharging apparatus further includes a first dc breaker, a second dc breaker, a first ac breaker, a first dc contactor, a second dc contactor, and a third dc contactor, wherein a first end of the first dc breaker is electrically connected to the first battery pack, and a second end of the first dc breaker is electrically connected to a first end of the second dc breaker, a first end of the first dc contactor, and a first end of the third dc contactor, respectively; the second end of the second direct current breaker is electrically connected with the input end of the first converter module and the first end of the first alternating current breaker; the second end of the first direct current contactor is electrically connected with the output end of the first converter module and the first end of the second direct current contactor respectively; the second end of the first alternating current circuit breaker is electrically connected with an external alternating current power supply, and the first end of the first alternating current circuit breaker is also electrically connected with the input end of the first converter module; the second end of the second direct current contactor is electrically connected with a first object to be charged, and the first end of the second direct current contactor is also electrically connected with the output end of the first converter module; and the second end of the third direct current contactor is electrically connected with an external direct current power supply.
In a preferred embodiment of the above charging and discharging device, the first ac circuit breaker is interlocked with the second dc circuit breaker.
In a preferred embodiment of the above charging and discharging device, the charging and discharging device further includes a first ac contactor, a first end of the first ac contactor is electrically connected to the input end of the first converter module, and a second end of the first ac contactor is electrically connected to the first end of the first ac circuit breaker.
In a preferred embodiment of the above charge and discharge device, the charge and discharge device further includes: a second battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged; a second converter module selectively operable in an AC/DC mode or a DC/DC mode; in the AC/DC mode, an input terminal of the second converter module is connected to an external alternating current power source, and an output terminal of the second converter module is connected to the second battery pack or a second object to be charged, so as to convert alternating current of the external alternating current power source into direct current and thus charge the second battery pack or charge the second object to be charged; in the DC/DC mode, an input terminal of the second inverter module is connected to the second battery pack, and an output terminal of the second inverter module is connected to a second object to be charged, so that the second battery pack charges the second object to be charged.
In a preferred embodiment of the above charging and discharging apparatus, the charging and discharging apparatus further includes a third dc circuit breaker, a fourth dc circuit breaker, a second ac circuit breaker, a fourth dc contactor, a fifth dc contactor, and a sixth dc contactor, wherein a first end of the third dc circuit breaker is electrically connected to the second battery pack, and a second end of the third dc circuit breaker is electrically connected to a first end of the fourth dc circuit breaker, a first end of the fourth dc contactor, and a first end of the sixth dc contactor, respectively; a second end of the fourth dc breaker is electrically connected to the input of the second inverter module and the first end of the second ac breaker; a second end of the fourth dc contactor is electrically connected to an output end of the second converter module and a first end of the fifth dc contactor, respectively; the second end of the second alternating current circuit breaker is electrically connected with an external alternating current power supply, and the first end of the second alternating current circuit breaker is also electrically connected with the input end of the second converter module; the second end of the fifth direct current contactor is electrically connected with a second object to be charged, and the first end of the fifth direct current contactor is also electrically connected with the output end of the second converter module; and the second end of the sixth direct current contactor is electrically connected with an external direct current power supply.
In a preferred embodiment of the above charging and discharging device, the second ac circuit breaker is interlocked with the fourth dc circuit breaker.
In a preferred embodiment of the above charging and discharging device, the charging and discharging device further includes a second ac contactor, a first end of the second ac contactor is electrically connected to the input end of the second converter module, and a second end of the second ac contactor is electrically connected to the first end of the second ac circuit breaker.
In a preferred embodiment of the above charging and discharging device, the charging and discharging device further includes an interconnection contactor, a first end of the interconnection contactor is electrically connected to the output end of the first converter module, and a second end of the interconnection contactor is electrically connected to the output end of the second converter module, so that the first converter module and the second converter module can be selectively connected in parallel.
In a preferred embodiment of the above charging and discharging device, the charging and discharging device further includes a controller, and the controller is respectively connected to the first converter module, the first battery pack, the second converter module, and the second battery pack in a communication manner, and is configured to control operations of the first converter module, the first battery pack, the second converter module, and the second battery pack.
In the above-described preferred embodiment of the charge and discharge device, when the interconnection contactor is closed, the second dc contactor is interlocked with the fifth dc contactor.
In the above preferred embodiment of the charging and discharging device, the controller includes a main controller, a first sub-controller and a second sub-controller, and the first sub-controller is respectively connected to the main controller, the first battery pack and the first inverter module in communication, and is configured to control operations of the first battery pack and the first inverter module; the second sub-controller is respectively in communication connection with the main controller, the second battery pack and the second converter module and is used for controlling the operation of the second battery pack and the second converter module; the main controller is used for coordinating the cooperation between the first sub-controller and the second sub-controller.
According to another aspect of the present invention, there is provided a charge and discharge device including: a first battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged; a first converter module assembly including a first AC/DC module and a first DC/DC module, an input end of the first AC/DC module being connectable with an external alternating current power source, an output end of the first AC/DC module being selectively connectable to the first battery pack or a first object to be charged so as to convert alternating current of the external alternating current power source into direct current and thus charge the first battery pack or the first object to be charged; an input terminal of the first DC/DC module is connectable to the first battery pack, and an output terminal of the first DC/DC module is connectable to a first object to be charged, so that the first battery pack can charge the first object to be charged.
In a preferred embodiment of the above charge and discharge device, the charge and discharge device further includes a first dc breaker, a second dc breaker, a first ac breaker, a first dc contactor, a second dc contactor, and a third dc contactor, wherein a first end of the first dc breaker is electrically connected to the first battery pack, and a second end of the first dc breaker is electrically connected to a first end of the second dc breaker, a first end of the first dc contactor, and a first end of the third dc contactor, respectively; the second end of the second direct current breaker is electrically connected with the input end of the first DC/DC module and the first end of the first alternating current breaker; the second end of the first direct current contactor is electrically connected with the output end of the first AC/DC module and the first end of the second direct current contactor respectively; the second end of the first alternating current circuit breaker is electrically connected with an external alternating current power supply, and the first end of the first alternating current circuit breaker is also electrically connected with the input end of the first AC/DC module; the second end of the second direct current contactor is electrically connected with a first object to be charged, and the first end of the second direct current contactor is also electrically connected with the output end of the first DC/DC module; and the second end of the third direct current contactor is electrically connected with an external direct current power supply.
In a preferred embodiment of the above charging and discharging device, the first ac circuit breaker is interlocked with the second dc circuit breaker.
In a preferred embodiment of the above charging and discharging device, the charging and discharging device further includes a first AC contactor, a first end of the first AC contactor is electrically connected to the input end of the first AC/DC module, and a second end of the first AC contactor is electrically connected to the first end of the first AC circuit breaker.
In a preferred embodiment of the above charge and discharge device, the charge and discharge device further includes: a second battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged; a second converter module assembly including a second AC/DC module and a second DC/DC module, an input end of the second AC/DC module being connectable with an external alternating current power source, an output end of the second AC/DC module being selectively connectable to the second battery pack or a second object to be charged so as to convert alternating current of the external alternating current power source into direct current and thus charge the second battery pack or charge the second object to be charged; an input terminal of the second DC/DC module may be connected to the second battery pack, and an output terminal of the second DC/DC module may be connected to a second object to be charged, so that the second battery pack may charge the second object to be charged.
In a preferred embodiment of the above charging and discharging apparatus, the charging and discharging apparatus further includes a third dc circuit breaker, a fourth dc circuit breaker, a second ac circuit breaker, a fourth dc contactor, a fifth dc contactor, and a sixth dc contactor, wherein a first end of the third dc circuit breaker is electrically connected to the second battery pack, and a second end of the third dc circuit breaker is electrically connected to a first end of the fourth dc circuit breaker, a first end of the fourth dc contactor, and a first end of the sixth dc contactor, respectively; the second end of the fourth direct current breaker is electrically connected with the input end of the second DC/DC module and the first end of the second alternating current breaker; the second end of the fourth direct current contactor is electrically connected with the output end of the second AC/DC module and the first end of the fifth direct current contactor respectively; the second end of the second alternating current circuit breaker is electrically connected with an external alternating current power supply, and the first end of the second alternating current circuit breaker is also electrically connected with the input end of the second AC/DC module; the second end of the fifth direct current contactor is electrically connected with a second object to be charged, and the first end of the fifth direct current contactor is also electrically connected with the output end of the second DC/DC module; and the second end of the sixth direct current contactor is electrically connected with an external direct current power supply.
In a preferred embodiment of the above charging and discharging device, the second ac circuit breaker is interlocked with the fourth dc circuit breaker.
In a preferred embodiment of the above charging and discharging device, the charging and discharging device further includes a second AC contactor, a first end of the second AC contactor is electrically connected to the input end of the second AC/DC module, and a second end of the second AC contactor is electrically connected to the first end of the second AC circuit breaker.
In a preferred embodiment of the above charging and discharging apparatus, the charging and discharging apparatus further includes an interconnection contactor, a first end of the interconnection contactor is electrically connected to the output end of the first AC/DC module and/or the first DC/DC module, and a second end of the interconnection contactor is electrically connected to the output end of the second AC/DC module and/or the second DC/DC module, so that the first AC/DC module and/or the first DC/DC module can be selectively connected in parallel with the second AC/DC module and/or the second DC/DC module.
In a preferred embodiment of the above charging and discharging device, the charging and discharging device further includes a controller, and the controller is respectively connected in communication with the first converter module assembly, the first battery pack, the second converter module assembly, and the second battery pack, and is configured to control operations of the first converter module assembly, the first battery pack, the second converter module assembly, and the second battery pack.
In the above-described preferred embodiment of the charge and discharge device, when the interconnection contactor is closed, the second dc contactor is interlocked with the fifth dc contactor.
In the above preferred embodiment of the charging and discharging device, the controller includes a main controller, a first sub-controller and a second sub-controller, and the first sub-controller is respectively connected in communication with the main controller, the first battery pack and the first inverter module assembly, and is configured to control operations of the first battery pack and the first inverter module assembly; the second sub-controller is respectively in communication connection with the main controller, the second battery pack and the second converter module assembly and is used for controlling the operation of the second battery pack and the second converter module assembly; the main controller is used for coordinating the cooperation between the first sub-controller and the second sub-controller.
According to another aspect of the invention, the invention further provides a mobile charging vehicle, wherein the mobile charging vehicle comprises one of the charging and discharging devices.
Compared with the mobile charging vehicle in the prior art, the charging and discharging equipment and the mobile charging vehicle can adopt an external direct-current power supply for power supplement and also can adopt an external alternating-current power supply for power supplement, so that the diversity and adaptability of the power supplement of the battery pack of the charging and discharging equipment and the mobile charging vehicle are realized; meanwhile, the charging and discharging equipment and the mobile charging vehicle can charge the object to be charged by adopting the battery pack, and can also charge the object to be charged by adopting an external alternating current power supply while supplementing power, so that the flexibility of charging the object to be charged is realized, and the charging and discharging equipment and the mobile charging vehicle are very convenient to use. In other words, the charging and discharging equipment and the mobile charging vehicle can charge the battery pack by using the direct current charging pile and can also charge the object to be charged by using the external alternating current power supply, so that the service efficiency of the charging and discharging equipment and the mobile charging vehicle is improved.
Drawings
Fig. 1 is a schematic structural view of a charge and discharge device according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a charge and discharge device according to another embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that the embodiments are only for explaining the technical principle of the present invention and are not intended to limit the scope of the present invention. For example, although the present application is described in conjunction with a mobile charging car and an electric car, it is obvious that the technical solution of the present invention is not limited thereto, and those skilled in the art can apply the present invention to other objects to be charged or mobile or non-mobile charging devices as needed without departing from the basic principle of the present invention.
Generally, the basic concept of the invention is that the existing mobile charging vehicle can be used for supplementing electricity by using an alternating current power supply through an AC/DC module and can also be used for supplementing electricity by using a direct current power supply through a direct current charging pile, so that the dependence of the mobile charging vehicle on the direct current charging pile is reduced, and the mobile charging vehicle is more convenient to supplement electricity; simultaneously, both can utilize the group battery of mobile charging car to treat the charging object through the DC/DC module and charge, also can utilize outside alternating current power supply to treat the charging object through the AC/DC module and charge for the mobile charging car can be through outside alternating current power supply for treating the charging object charging when filling the electric pile for self through the direct current and mend the electricity, thereby improves the diversity and the adaptability of treating the charging object charging.
Referring initially to fig. 1, a charging and discharging device according to a first embodiment of the present invention is shown. The charging and discharging device comprises a first and a second battery pack (battery pack 1 and battery pack 2 shown in fig. 1), a first and a second inverter module (inverter module 1 and inverter module 2 shown in fig. 1), wherein both the first inverter module and the second inverter module are dual function modules that can operate in either AC/DC mode or DC/DC mode. In the AC/DC mode, an input terminal of the first inverter module is connected to an external alternating current power source, and an output terminal of the first inverter module is connected to the first battery pack or the first object to be charged, so as to convert alternating current power of the external alternating current power source into direct current and thus charge the first battery pack or the first object to be charged; in the DC/DC mode, an input terminal of the first inverter module is connected to the first battery pack, and an output terminal of the first inverter module is connected to the first object to be charged, so that the first battery pack charges the first object to be charged. Similarly, in the AC/DC mode, an input terminal of the second inverter module is connected to an external alternating current power source, and an output terminal of the second inverter module is connected to the second battery pack or the second object to be charged, so as to convert alternating current of the external alternating current power source into direct current and thus charge the second battery pack or the second object to be charged; in the DC/DC mode, an input terminal of the second inverter module is connected to the second battery pack, and an output terminal of the second inverter module is connected to the second object to be charged, so that the second battery pack charges the second object to be charged.
Here, the first object to be charged and the second object to be charged refer to any type of objects to be charged connected to the output terminal of the converter module, and they are not classified successively or primarily. The object to be charged may be an electric car, an electric bicycle, or other devices requiring charging.
In the embodiment of fig. 1, the charging and discharging apparatus further includes a first dc breaker 11, a second dc breaker 12, a first ac breaker 13, a first dc contactor 15, a second dc contactor 17, and a third dc contactor 14, wherein a first end of the first dc breaker 11 is electrically connected to the first battery pack, and a second end of the first dc breaker 11 is electrically connected to a first end of the second dc breaker 12, a first end of the first dc contactor 15, and a first end of the third dc contactor 14, respectively; a second terminal of the second dc breaker 12 is electrically connected to the input of the first inverter module and to a first terminal of the first ac breaker 13; the second end of the first dc contactor 15 is electrically connected to the output of the first inverter module and the first end of the second dc contactor 17, respectively; the second end of the first ac circuit breaker 13 is electrically connected to an external ac power source, and the first end of the first ac circuit breaker 13 is also electrically connected to the input of the first inverter module; a second end of the second dc contactor 17 is electrically connected to the first object to be charged, and a first end of the second dc contactor 17 is also electrically connected to an output end of the first inverter module; the second terminal of the third dc contactor 14 is electrically connected to an external dc power source.
In the embodiment of fig. 1, the charging and discharging device further comprises a first ac contactor 16, a first terminal of the first ac contactor 16 being electrically connected to the input terminal of the first inverter module, and a second terminal of the first ac contactor 16 being electrically connected to the first terminal of the first ac circuit breaker 13. In some embodiments of the charging and discharging device of the present invention, the charging and discharging device may not include the first ac contactor 16.
In the embodiment of fig. 1, the charging and discharging apparatus further includes a third dc breaker 21, a fourth dc breaker 22, a second ac breaker 23, a fourth dc contactor 25, a fifth dc contactor 27, and a sixth dc contactor 24, wherein a first end of the third dc breaker 21 is electrically connected to the second battery pack, and a second end of the third dc breaker 21 is electrically connected to a first end of the fourth dc breaker 22, a first end of the fourth dc contactor 25, and a first end of the sixth dc contactor 24, respectively; a second terminal of the fourth dc breaker 22 is electrically connected to the input of the second inverter module and to a first terminal of the second ac breaker 23; a second end of the fourth dc contactor 25 is electrically connected to an output end of the second inverter module and a first end of the fifth dc contactor 27, respectively; a second end of the second ac circuit breaker 23 is electrically connected to an external ac power source, and a first end of the second ac circuit breaker 23 is also electrically connected to an input end of the second inverter module; a second end of the fifth dc contactor 27 is electrically connected to the second object to be charged, and a first end of the fifth dc contactor 27 is also electrically connected to an output end of the second inverter module; the second end of the sixth dc contactor 24 is electrically connected to an external dc power source.
In the embodiment of fig. 1, the charging and discharging device further comprises a second ac contactor 26, a first terminal of the second ac contactor 26 being electrically connected to the input terminal of the second inverter module, and a second terminal of the second ac contactor 26 being electrically connected to the first terminal of the second ac circuit breaker 23. Similarly, in some embodiments of the charging and discharging device of the present invention, the charging and discharging device may not include the second ac contactor 26.
With continued reference to fig. 1, in the embodiment of fig. 1, the charging and discharging apparatus of the present invention further comprises a main controller and a first and a second sub-controllers, wherein the first sub-controller is communicatively connected to the main controller, the first battery pack and the first inverter module, respectively (the communication connection is indicated by a dashed line in fig. 1), for controlling the operation of the first battery pack and the first inverter module; the second sub-controller is respectively in communication connection with the main controller, the second battery pack and the second converter module and is used for controlling the operation of the second battery pack and the second converter module; the main controller is used for coordinating the cooperation between the first sub-controller and the second sub-controller.
In the embodiment of fig. 1, the charge and discharge device further includes an interconnection contactor 31, a first end of the interconnection contactor 31 is electrically connected to the output terminal of the first inverter module, and a second end of the interconnection contactor 31 is electrically connected to the output terminal of the second inverter module, so that the first inverter module can be selectively connected in parallel with the second inverter module.
In the working state, when the interconnection contactor 31 is disconnected, the two battery packs can work independently without mutual interference; when the interconnection contactor 31 is closed, the first battery pack and the second battery pack may be connected in parallel to charge the first object to be charged or the second object to be charged, or the electric power of the ac power source may be connected in parallel to charge the first object to be charged or the second object to be charged through the first inverter module and the second inverter module. In the latter case, since only one object to be charged is charged, the charging power is large and the speed is fast. If the electric quantity of one group of battery packs is released, the other group of battery packs can be adopted to continuously charge the object to be charged. In normal operation, the second dc contactor 17, the fifth dc contactor 27 and the interconnection contactor 31 are electrically locked, and at most, only 2 groups of dc contactors can be closed, and 3 groups of dc contactors are not allowed to be closed at the same time.
In the normal working state of the charging and discharging device of the present invention, the first ac circuit breaker 13 is mechanically locked with the second dc circuit breaker 12; the second ac breaker 23 is mechanically latched to the fourth dc breaker 22. That is, when the first ac breaker 13 is closed, the second dc breaker 12 is open, and vice versa; when the second ac breaker 23 is closed, the fourth dc breaker 22 is opened and vice versa.
When the first battery pack is charged using the dc charging pile (external dc power supply on the left side of fig. 1), the first dc breaker 11 and the third dc contactor 14 are closed, and the second dc breaker 12 and the first dc contactor 15 are opened.
When the second battery pack is recharged using the dc charging post (external dc power supply on the right side of fig. 1), the third dc breaker 21 and the sixth dc contactor 24 are closed, and the fourth dc breaker 22 and the fourth dc contactor 25 are opened.
When an external alternating current power supply is adopted to supplement power to the first battery pack, the first converter module is switched to an AC/DC mode, at the moment, the first alternating current circuit breaker 13, the first alternating current contactor 16, the first direct current contactor 15 and the first direct current circuit breaker 11 are closed, the second direct current circuit breaker 12, the second direct current contactor 17, the third direct current contactor 14 and the interconnection contactor 31 are opened, and alternating current can supplement power to the first battery pack after being rectified by the first converter module.
When the second battery pack is supplied with power by an external alternating current power supply, the second inverter module is switched to an AC/DC mode, at this time, the second alternating current circuit breaker 23, the second alternating current contactor 26, the fourth direct current contactor 25 and the third direct current circuit breaker 21 are closed, the fourth direct current circuit breaker 22, the fifth direct current contactor 27, the sixth direct current contactor 24 and the interconnection contactor 31 are opened, and the alternating current can be rectified by the second inverter module to supply power to the second battery pack.
When the first battery pack is used for charging the first object to be charged, the first converter module is switched to the DC/DC mode, at this time, the first DC breaker 11, the second DC breaker 12 and the second DC contactor 17 are closed, the first ac breaker 13, the first ac contactor 16, the first DC contactor 15 and the third DC contactor 14 are opened, and the electric energy of the first battery pack is rectified by the first converter module and then charges the first object to be charged.
When the second battery pack is used for charging the second object to be charged, the second converter module is switched to the DC/DC mode, at this time, the third DC breaker 21, the fourth DC breaker 22 and the fifth DC contactor 27 are closed, the second ac breaker 23, the second ac contactor 26, the fourth DC contactor 25 and the sixth DC contactor 24 are opened, and the electric energy of the second battery pack is rectified by the second DC/DC module to charge the second object to be charged.
When the alternating current power supply is used for charging the first object to be charged, the first converter module is switched to the AC/DC mode, at this time, the first alternating current circuit breaker 13, the first alternating current contactor 16 and the second direct current contactor 17 are closed, the first direct current circuit breaker 11, the second direct current circuit breaker 12, the first direct current contactor 15 and the interconnection contactor 31 are opened, and the alternating current power can be rectified by the first converter module and then charge the first object to be charged.
When the alternating current power supply is used for charging the second object to be charged, the second converter module is switched to the AC/DC mode, at this time, the second alternating current circuit breaker 23, the second alternating current contactor 26 and the fifth direct current contactor 27 are closed, the third direct current circuit breaker 21, the fourth direct current circuit breaker 22, the fourth direct current contactor 25 and the interconnection contactor 31 are opened, and the alternating current power can be rectified by the second converter module and then charge the second object to be charged.
A second embodiment of the invention is described below in conjunction with fig. 2. As shown in fig. 2, the charge and discharge device according to the second embodiment of the present invention includes first and second battery packs (the battery pack 1 and the battery pack 2 shown in fig. 2), first and second inverter module assemblies (the inverter module assembly 1 and the inverter module assembly 2 shown in fig. 2), wherein the first inverter module assembly includes a first AC/DC module (the AC/DC module 1 shown in fig. 2) and a first DC/DC module (the DC/DC module 1 shown in fig. 2), and the second inverter module assembly includes a second AC/DC module (the AC/DC module 2 shown in fig. 2) and a second DC/DC module (the DC/DC module 2 shown in fig. 2); the input end of the first AC/DC module can be connected with an external alternating current power supply, and the output end of the first AC/DC module can be selectively connected to the first battery pack or the first object to be charged so as to convert the alternating current of the external alternating current power supply into direct current and thus charge the first battery pack or charge the first object to be charged; an input end of the first DC/DC module is connectable to a first battery pack, and an output end of the first DC/DC module is connectable to a first object to be charged, so that the first battery pack can charge the first object to be charged; the input end of the second AC/DC module can be connected with an external alternating current power supply, and the output end of the second AC/DC module can be selectively connected to the second battery pack or a second object to be charged so as to convert the alternating current of the external alternating current power supply into direct current and thus charge the second battery pack or charge the second object to be charged; an input terminal of the second DC/DC module is connectable to a second battery pack, and an output terminal of the second DC/DC module is connectable to a second object to be charged, so that the second battery pack can charge the second object to be charged.
Here, the AC/DC module and the DC/DC module are combined together to form a converter module assembly, and the AC/DC module and the DC/DC module are mutually exclusively connected; however, the AC/DC module and the DC/DC module may not be combined together but may be provided as separate modules independent of each other. The first object to be charged and the second object to be charged refer to any type of objects to be charged connected to the output terminal of the converter module. The object to be charged may be an electric car, an electric bicycle, or other devices requiring charging.
In the embodiment of fig. 2, the charging and discharging apparatus further includes a first dc breaker 11, a second dc breaker 12, a first ac breaker 13, a first dc contactor 15, a second dc contactor 17, and a third dc contactor 14, wherein a first end of the first dc breaker 11 is electrically connected to the first battery pack, and a second end of the first dc breaker 11 is electrically connected to a first end of the second dc breaker 12, a first end of the first dc contactor 15, and a first end of the third dc contactor 14, respectively; the second terminal of the second direct current breaker 12 is electrically connected to the input terminal of the first DC/DC module and the first terminal of the first alternating current breaker 13; the second end of the first direct current contactor 15 is electrically connected with the output end of the first AC/DC module and the first end of the second direct current contactor 17 respectively; the second end of the first AC circuit breaker 13 is electrically connected to an external AC power source, and the first end of the first AC circuit breaker 13 is also electrically connected to the input of the first AC/DC module; a second end of the second direct current contactor 17 is electrically connected with the first object to be charged, and a first end of the second direct current contactor 17 is also electrically connected with an output end of the first DC/DC module; the second terminal of the third dc contactor 14 is electrically connected to an external dc power source.
In the embodiment of fig. 2, the charging and discharging device further includes a first AC contactor 16, a first terminal of the first AC contactor 16 is electrically connected to the input terminal of the first AC/DC module, and a second terminal of the first AC contactor 16 is electrically connected to the first terminal of the first AC circuit breaker 13. In some embodiments of the charging and discharging device of the present invention, the charging and discharging device may not include the first ac contactor 16.
In the embodiment of fig. 2, the charging and discharging apparatus further includes a third dc breaker 21, a fourth dc breaker 22, a second ac breaker 23, a fourth dc contactor 25, a fifth dc contactor 27, and a sixth dc contactor 24, wherein a first end of the third dc breaker 21 is electrically connected to the second battery pack, and a second end of the third dc breaker 21 is electrically connected to a first end of the fourth dc breaker 22, a first end of the fourth dc contactor 25, and a first end of the sixth dc contactor 24, respectively; a second terminal of the fourth direct current breaker 22 is electrically connected to the input terminal of the second DC/DC module and to a first terminal of the second alternating current breaker 23; the second end of the fourth direct current contactor 25 is electrically connected to the output end of the second AC/DC module and the first end of the fifth direct current contactor 27, respectively; a second terminal of the second AC circuit breaker 23 is electrically connected to an external AC power source, and a first terminal of the second AC circuit breaker 23 is also electrically connected to an input terminal of the second AC/DC module; a second end of the fifth direct current contactor 27 is electrically connected with the second object to be charged, and a first end of the fifth direct current contactor 27 is also electrically connected with an output end of the second DC/DC module; the second end of the sixth dc contactor 24 is electrically connected to an external dc power source.
In the embodiment of fig. 2, the charging and discharging device further includes a second AC contactor 26, a first terminal of the second AC contactor 26 is electrically connected to the input terminal of the second AC/DC module, and a second terminal of the second AC contactor 26 is electrically connected to the first terminal of the second AC breaker 23. Similarly, in some embodiments of the charging and discharging device of the present invention, the charging and discharging device may not include the second ac contactor 26.
With continued reference to fig. 2, in the embodiment of fig. 2, the charging and discharging apparatus of the present invention further comprises a main controller and first and second sub-controllers, wherein the first sub-controller is communicatively connected to the main controller, the first battery pack and the first inverter module assembly, respectively (the communication connection is indicated by a dashed line in fig. 2), for controlling the operation of the first battery pack and the first inverter module assembly; the second sub-controller is respectively in communication connection with the main controller, the second battery pack and the second converter module assembly and is used for controlling the operation of the second battery pack and the second converter module assembly; the main controller is used for coordinating the cooperation between the first sub-controller and the second sub-controller.
In the embodiment of fig. 2, the charge and discharge device further includes an interconnection contactor 31, a first end of the interconnection contactor 31 is electrically connected to the output terminal of the first AC/DC module and/or the first DC/DC module, and a second end of the interconnection contactor 31 is electrically connected to the output terminal of the second AC/DC module and/or the second DC/DC module, so that the first AC/DC module and/or the first DC/DC module can be selectively connected in parallel with the second AC/DC module and/or the second DC/DC module.
In the working state, when the interconnection contactor 31 is disconnected, the two battery packs can work independently without mutual interference; when the interconnection contactor 31 is closed, the first battery pack and the second battery pack may be connected in parallel to charge the first object to be charged or the second object to be charged, or the electric power of the alternating current power source may be connected in parallel to charge the first object to be charged or the second object to be charged through the first AC/DC module and the second AC/DC module. In the latter case, since only one object to be charged is charged, the charging power is large and the speed is fast. If the electric quantity of one group of battery packs is released, the other group of battery packs can be adopted to continuously charge the object to be charged. In normal operation, the second dc contactor 17, the fifth dc contactor 27 and the interconnection contactor 31 are electrically locked, and at most, only 2 groups of dc contactors can be closed, and 3 groups of dc contactors are not allowed to be closed at the same time.
In the normal working state of the charging and discharging device of the present invention, the first ac circuit breaker 13 is mechanically locked with the second dc circuit breaker 12; the second ac breaker 23 is mechanically latched to the fourth dc breaker 22. That is, when the first ac breaker 13 is closed, the second dc breaker 12 is open, and vice versa; when the second ac breaker 23 is closed, the fourth dc breaker 22 is opened and vice versa.
When the first battery pack is charged using the dc charging pile (external dc power supply on the left side of fig. 2), the first dc breaker 11 and the third dc contactor 14 are closed, and the second dc breaker 12 and the first dc contactor 15 are opened.
When the second battery pack is recharged using the dc charging post (external dc power supply on the right side of fig. 2), the third dc breaker 21 and the sixth dc contactor 24 are closed, and the fourth dc breaker 22 and the fourth dc contactor 25 are opened.
When an external alternating current power supply is adopted to supplement power to the first battery pack, the first alternating current circuit breaker 13, the first alternating current contactor 16, the first direct current contactor 15 and the first direct current circuit breaker 11 are closed, the second direct current circuit breaker 12, the second direct current contactor 17, the third direct current contactor 14 and the interconnection contactor 31 are opened, and alternating current can supplement power to the first battery pack after passing through the first AC/DC module.
When the external alternating current power supply is used for supplying power to the second battery pack, the second alternating current circuit breaker 23, the second alternating current contactor 26, the fourth direct current contactor 25 and the third direct current circuit breaker 21 are closed, the fourth direct current circuit breaker 22, the fifth direct current contactor 27, the sixth direct current contactor 24 and the interconnection contactor 31 are opened, and the alternating current power can supply power to the second battery pack after passing through the second AC/DC module.
When the first battery pack is used for charging the first object to be charged, the first direct current breaker 11, the second direct current breaker 12 and the second direct current contactor 17 are closed, the first alternating current breaker 13, the first alternating current contactor 16, the first direct current contactor 15 and the third direct current contactor 14 are opened, and electric energy of the first battery pack charges the first object to be charged after passing through the first DC/DC module.
When a second battery pack is used for charging a second object to be charged, the third direct current breaker 21, the fourth direct current breaker 22 and the fifth direct current contactor 27 are closed, the second alternating current breaker 23, the second alternating current contactor 26, the fourth direct current contactor 25 and the sixth direct current contactor 24 are opened, and electric energy of the second battery pack charges the second object to be charged after passing through the second DC/DC module.
When the first object to be charged is charged by using the AC power supply, the first AC circuit breaker 13, the first AC contactor 16, and the second DC contactor 17 are closed, the first DC circuit breaker 11, the second DC circuit breaker 12, the first DC contactor 15, and the interconnection contactor 31 are opened, and the AC power can pass through the first AC/DC module and then charge the first object to be charged.
When the second object to be charged is charged by using the AC power supply, the second AC circuit breaker 23, the second AC contactor 26, and the fifth DC contactor 27 are closed, the third DC circuit breaker 21, the fourth DC circuit breaker 22, the fourth DC contactor 25, and the interconnection contactor 31 are opened, and the AC power can charge the second object to be charged after passing through the second AC/DC module.
Compared with the existing mobile charging vehicle, the charging and discharging equipment and the mobile charging vehicle can adopt the direct current charging pile to supplement the electricity to the battery pack, and also can adopt the alternating current power supply to supplement the electricity to the battery pack through the AC/DC module, so that the diversity and the adaptability of the electricity supplementing mode to the battery pack are realized, and the density of electricity supplementing points is improved; meanwhile, the charging and discharging equipment and the mobile charging vehicle can charge the object to be charged by the battery pack through the DC/DC module, and can also charge the object to be charged by the AC/DC module through the AC power supply, so that the diversity and the flexibility of charging the object to be charged are realized; in addition, the charging and discharging equipment and the mobile charging vehicle can charge the object to be charged by using the external alternating-current power supply while charging the battery pack by using the direct-current charging pile, so that the service efficiency of the charging and discharging equipment and the mobile charging vehicle is improved.
It is noted that the terms "first," "second," and the like in this application are used for distinguishing between similar elements and not necessarily for describing or implying any particular order or sequence. The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus/device.
Finally, it should be pointed out that, although both "circuit breaker" and "contactor" are described in the present application, these two technical features perform essentially the same operation, and the skilled person can interchange both wholly or partly, as long as the switching action for a specific circuit is achieved. Such variations are not to be regarded as a departure from the principles of the invention and are intended to be included within the scope of the invention. Furthermore, although two identical charge and discharge units and one interconnecting contactor disposed therebetween are shown in fig. 1 and 2, this is merely exemplary, and one skilled in the art may dispose more than two charge and discharge units and more than one interconnecting contactor as needed to provide different power outputs by connecting a plurality of charge and discharge units in parallel.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The invention claims the following technical scheme:
scheme 1, a charge and discharge equipment, its characterized in that, charge and discharge equipment includes:
a first battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged;
a first converter module selectively operable in an AC/DC mode or a DC/DC mode; in the AC/DC mode, an input terminal of the first converter module is connected to an external alternating current power source, and an output terminal of the first converter module is connected to the first battery pack or the first object to be charged, so as to convert alternating current power of the external alternating current power source into direct current and thus charge the first battery pack or charge the first object to be charged; in the DC/DC mode, an input terminal of the first inverter module is connected to the first battery pack, and an output terminal of the first inverter module is connected to a first object to be charged, so that the first battery pack charges the first object to be charged.
Scheme 2, the charging and discharging device according to scheme 1, characterized in that the charging and discharging device further comprises a first direct current breaker (11), a second direct current breaker (12), a first alternating current breaker (13), a first direct current contactor (15), a second direct current contactor (17) and a third direct current contactor (14),
wherein a first end of the first direct current breaker (11) is electrically connected with the first battery pack, and a second end of the first direct current breaker (11) is electrically connected with a first end of the second direct current breaker (12), a first end of the first direct current contactor (15) and a first end of the third direct current contactor (14) respectively;
a second terminal of the second direct current breaker (12) electrically connects the input of the first converter module and the first terminal of the first alternating current breaker (13);
the second end of the first direct current contactor (15) is electrically connected with the output end of the first converter module and the first end of the second direct current contactor (17) respectively;
the second end of the first alternating current breaker (13) is electrically connected with an external alternating current power supply, and the first end of the first alternating current breaker (13) is also electrically connected with the input end of the first converter module;
the second end of the second direct current contactor (17) is electrically connected with a first object to be charged, and the first end of the second direct current contactor (17) is also electrically connected with the output end of the first converter module;
and the second end of the third direct current contactor (14) is electrically connected with an external direct current power supply.
The charging and discharging device according to claim 3 or 2, wherein the first ac circuit breaker (13) is interlocked with the second dc circuit breaker (12).
Scheme 4, according to scheme 3 charge and discharge equipment, characterized in that, charge and discharge equipment still includes first ac contactor (16), the first end electricity of first ac contactor (16) is connected the input of first converter module, the second end electricity of first ac contactor (16) is connected the first end of first ac circuit breaker (13).
Scheme 5, according to scheme 4 charge and discharge equipment, characterized in that, charge and discharge equipment still includes:
a second battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged;
a second converter module selectively operable in an AC/DC mode or a DC/DC mode; in the AC/DC mode, an input terminal of the second converter module is connected to an external alternating current power source, and an output terminal of the second converter module is connected to the second battery pack or a second object to be charged, so as to convert alternating current of the external alternating current power source into direct current and thus charge the second battery pack or charge the second object to be charged; in the DC/DC mode, an input terminal of the second inverter module is connected to the second battery pack, and an output terminal of the second inverter module is connected to a second object to be charged, so that the second battery pack charges the second object to be charged.
Scheme 6, the charging and discharging device according to scheme 5, characterized in that the charging and discharging device further comprises a third direct current breaker (21), a fourth direct current breaker (22), a second alternating current breaker (23), a fourth direct current contactor (25), a fifth direct current contactor (27) and a sixth direct current contactor (24),
wherein a first end of the third direct current breaker (21) is electrically connected to the second battery pack, and a second end of the third direct current breaker (21) is electrically connected to a first end of the fourth direct current breaker (22), a first end of the fourth direct current contactor (25), and a first end of the sixth direct current contactor (24), respectively;
a second terminal of the fourth direct current breaker (22) electrically connects the input of the second converter module and the first terminal of the second alternating current breaker (23);
a second end of the fourth direct current contactor (25) is electrically connected with an output end of the second converter module and a first end of the fifth direct current contactor (27) respectively;
a second end of the second alternating current breaker (23) is electrically connected with an external alternating current power supply, and a first end of the second alternating current breaker (23) is also electrically connected with an input end of the second converter module;
a second end of the fifth direct current contactor (27) is electrically connected with a second object to be charged, and a first end of the fifth direct current contactor (27) is also electrically connected with an output end of the second converter module;
and the second end of the sixth direct current contactor (24) is electrically connected with an external direct current power supply.
The charging and discharging device according to claim 7 or 6, wherein the second ac circuit breaker (23) is interlocked with the fourth dc circuit breaker (22).
Scheme 8, according to scheme 7 charge and discharge equipment, characterized in that, charge and discharge equipment still includes second ac contactor (26), the first end electricity of second ac contactor (26) is connected the input of second converter module, the second end electricity of second ac contactor (26) is connected the first end of second ac circuit breaker (23).
Scheme 9, the charge and discharge device according to any one of claims 6 to 8, further comprising an interconnection contactor (31), wherein a first end of the interconnection contactor (31) is electrically connected to the output end of the first converter module, and a second end of the interconnection contactor (31) is electrically connected to the output end of the second converter module, so that the first converter module can be selectively connected in parallel with the second converter module.
The charging and discharging device according to claim 10 or 9, further comprising a controller, wherein the controller is in communication connection with the first converter module, the first battery pack, the second converter module, and the second battery pack, respectively, and is configured to control operations of the first converter module, the first battery pack, the second converter module, and the second battery pack.
The charging and discharging device according to claim 11 or 10, wherein the second dc contactor (17) is interlocked with the fifth dc contactor (27) when the interconnection contactor (31) is closed.
The charging and discharging device according to claim 12 or 10, wherein the controller includes a main controller, a first sub-controller and a second sub-controller, and the first sub-controller is in communication connection with the main controller, the first battery pack and the first inverter module, respectively, and is configured to control operations of the first battery pack and the first inverter module;
the second sub-controller is respectively in communication connection with the main controller, the second battery pack and the second converter module and is used for controlling the operation of the second battery pack and the second converter module;
the main controller is used for coordinating the cooperation between the first sub-controller and the second sub-controller.
Scheme 13, a charge and discharge equipment, its characterized in that, charge and discharge equipment includes:
a first battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged;
a first converter module assembly including a first AC/DC module and a first DC/DC module, an input end of the first AC/DC module being connectable with an external alternating current power source, an output end of the first AC/DC module being selectively connectable to the first battery pack or a first object to be charged so as to convert alternating current of the external alternating current power source into direct current and thus charge the first battery pack or charge the first object to be charged; an input terminal of the first DC/DC module is connectable to the first battery pack, and an output terminal of the first DC/DC module is connectable to a first object to be charged, so that the first battery pack can charge the first object to be charged.
Scheme 14, the charging and discharging device according to scheme 13, further comprising a first dc breaker (11), a second dc breaker (12), a first ac breaker (13), a first dc contactor (15), a second dc contactor (17), and a third dc contactor (14),
wherein a first end of the first direct current breaker (11) is electrically connected with the first battery pack, and a second end of the first direct current breaker (11) is electrically connected with a first end of the second direct current breaker (12), a first end of the first direct current contactor (15) and a first end of the third direct current contactor (14) respectively;
the second terminal of the second direct current breaker (12) electrically connects the input of the first DC/DC module and the first terminal of the first alternating current breaker (13);
the second end of the first direct current contactor (15) is electrically connected with the output end of the first AC/DC module and the first end of the second direct current contactor (17) respectively;
the second end of the first alternating current breaker (13) is electrically connected with an external alternating current power supply, and the first end of the first alternating current breaker (13) is also electrically connected with the input end of the first AC/DC module;
the second end of the second direct current contactor (17) is electrically connected with a first object to be charged, and the first end of the second direct current contactor (17) is also electrically connected with the output end of the first DC/DC module;
and the second end of the third direct current contactor (14) is electrically connected with an external direct current power supply.
The charging and discharging device according to claim 15 or 14, wherein the first ac circuit breaker (13) is interlocked with the second dc circuit breaker (12).
Scheme 16, the charge and discharge equipment of claim 15, characterized in that, the charge and discharge equipment still includes first AC contactor (16), the first end electricity of first AC contactor (16) is connected the input of first AC/DC module, the second end electricity of first AC contactor (16) is connected the first end of first AC circuit breaker (13).
Scheme 17, the charge and discharge equipment of scheme 16, characterized in that, the charge and discharge equipment still includes:
a second battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged;
a second converter module assembly including a second AC/DC module and a second DC/DC module, an input end of the second AC/DC module being connectable with an external alternating current power source, an output end of the second AC/DC module being selectively connectable to the second battery pack or a second object to be charged so as to convert alternating current of the external alternating current power source into direct current and thus charge the second battery pack or charge the second object to be charged; an input terminal of the second DC/DC module may be connected to the second battery pack, and an output terminal of the second DC/DC module may be connected to a second object to be charged, so that the second battery pack may charge the second object to be charged.
Scheme 18, the charging and discharging device according to scheme 17, further comprising a third dc breaker (21), a fourth dc breaker (22), a second ac breaker (23), a fourth dc contactor (25), a fifth dc contactor (27) and a sixth dc contactor (24),
wherein a first end of the third direct current breaker (21) is electrically connected to the second battery pack, and a second end of the third direct current breaker (21) is electrically connected to a first end of the fourth direct current breaker (22), a first end of the fourth direct current contactor (25), and a first end of the sixth direct current contactor (24), respectively;
a second terminal of the fourth direct current breaker (22) electrically connects the input terminal of the second DC/DC module and the first terminal of the second alternating current breaker (23);
the second end of the fourth direct current contactor (25) is electrically connected with the output end of the second AC/DC module and the first end of the fifth direct current contactor (27) respectively;
a second end of the second alternating current breaker (23) is electrically connected with an external alternating current power supply, and a first end of the second alternating current breaker (23) is also electrically connected with an input end of the second AC/DC module;
the second end of the fifth direct current contactor (27) is electrically connected with a second object to be charged, and the first end of the fifth direct current contactor (27) is also electrically connected with the output end of the second DC/DC module;
and the second end of the sixth direct current contactor (24) is electrically connected with an external direct current power supply.
The charging and discharging device according to claim 19 or 18, wherein the second ac circuit breaker (23) is interlocked with the fourth dc circuit breaker (22).
Scheme 20, the charge and discharge equipment of claim 19, characterized in that, the charge and discharge equipment also includes a second AC contactor (26), the first end of second AC contactor (26) is electrically connected to the input of the second AC/DC module, the second end of second AC contactor (26) is electrically connected to the first end of the second AC circuit breaker (23).
Scheme 21, the charging and discharging device according to any one of claims 18 to 20, further comprising an interconnection contactor (31), wherein a first end of the interconnection contactor (31) is electrically connected to an output of the first AC/DC module and/or the first DC/DC module, and a second end of the interconnection contactor (31) is electrically connected to an output of the second AC/DC module and/or the second DC/DC module, so that the first AC/DC module and/or the first DC/DC module can be selectively connected in parallel with the second AC/DC module and/or the second DC/DC module.
The charging and discharging device according to claim 22 or 21, further comprising a controller, wherein the controller is in communication connection with the first converter module assembly, the first battery pack, the second converter module assembly, and the second battery pack, respectively, and is configured to control operations of the first converter module assembly, the first battery pack, the second converter module assembly, and the second battery pack.
Scheme 23, the charging and discharging equipment according to scheme 22, wherein when the interconnection contactor (31) is closed, the second dc contactor (17) is interlocked with the fifth dc contactor (27).
The charging and discharging device according to claim 24 or 22, wherein the controller comprises a main controller, a first sub-controller and a second sub-controller, and the first sub-controller is respectively connected with the main controller, the first battery pack and the first converter module assembly in a communication manner and is used for controlling the operation of the first battery pack and the first converter module assembly;
the second sub-controller is respectively in communication connection with the main controller, the second battery pack and the second converter module assembly and is used for controlling the operation of the second battery pack and the second converter module assembly;
the main controller is used for coordinating the cooperation between the first sub-controller and the second sub-controller.
Scheme 25, a mobile charging vehicle, characterized in that, the mobile charging vehicle includes the charging and discharging device according to any one of schemes 1 to 24.

Claims (21)

1. A charging and discharging device, characterized in that the charging and discharging device comprises:
a first battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged;
a first converter module selectively operable in an AC/DC mode or a DC/DC mode; in the AC/DC mode, an input terminal of the first converter module is connected to an external alternating current power source, and an output terminal of the first converter module is connected to the first battery pack or the first object to be charged, so as to convert alternating current power of the external alternating current power source into direct current and thus charge the first battery pack or charge the first object to be charged; in a DC/DC mode, an input end of the first converter module is connected to the first battery pack, and an output end of the first converter module is connected to a first object to be charged, so that the first battery pack charges the first object to be charged;
a second battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged;
a second converter module selectively operable in an AC/DC mode or a DC/DC mode; in the AC/DC mode, an input terminal of the second converter module is connected to an external alternating current power source, and an output terminal of the second converter module is connected to the second battery pack or a second object to be charged, so as to convert alternating current of the external alternating current power source into direct current and thus charge the second battery pack or charge the second object to be charged; in the DC/DC mode, the input end of the second converter module is connected to the second battery pack, and the output end of the second converter module is connected to a second object to be charged, so that the second battery pack charges the second object to be charged;
the charging and discharging equipment further comprises an interconnection contactor (31), wherein a first end of the interconnection contactor (31) is electrically connected with the output end of the first converter module, and a second end of the interconnection contactor (31) is electrically connected with the output end of the second converter module, so that the first converter module and the second converter module can be selectively connected in parallel.
2. Charging and discharging device according to claim 1, characterized in that it further comprises a first direct current breaker (11), a second direct current breaker (12), a first alternating current breaker (13), a first direct current contactor (15), a second direct current contactor (17) and a third direct current contactor (14),
wherein a first end of the first direct current breaker (11) is electrically connected with the first battery pack, and a second end of the first direct current breaker (11) is electrically connected with a first end of the second direct current breaker (12), a first end of the first direct current contactor (15) and a first end of the third direct current contactor (14) respectively;
a second terminal of the second direct current breaker (12) electrically connects the input of the first converter module and the first terminal of the first alternating current breaker (13);
the second end of the first direct current contactor (15) is electrically connected with the output end of the first converter module and the first end of the second direct current contactor (17) respectively;
the second end of the first alternating current breaker (13) is electrically connected with an external alternating current power supply, and the first end of the first alternating current breaker (13) is also electrically connected with the input end of the first converter module;
the second end of the second direct current contactor (17) is electrically connected with a first object to be charged, and the first end of the second direct current contactor (17) is also electrically connected with the output end of the first converter module;
and the second end of the third direct current contactor (14) is electrically connected with an external direct current power supply.
3. Charging and discharging device according to claim 2, characterised in that said first alternating current breaker (13) is interlocked with said second direct current breaker (12).
4. Charging and discharging device according to claim 3, characterized in that it further comprises a first alternating current contactor (16), a first end of said first alternating current contactor (16) being electrically connected to the input of said first inverter module, a second end of said first alternating current contactor (16) being electrically connected to a first end of said first alternating current breaker (13).
5. Charging and discharging device according to claim 2, characterized in that it further comprises a third direct current breaker (21), a fourth direct current breaker (22), a second alternating current breaker (23), a fourth direct current contactor (25), a fifth direct current contactor (27) and a sixth direct current contactor (24),
wherein a first end of the third direct current breaker (21) is electrically connected to the second battery pack, and a second end of the third direct current breaker (21) is electrically connected to a first end of the fourth direct current breaker (22), a first end of the fourth direct current contactor (25), and a first end of the sixth direct current contactor (24), respectively;
a second terminal of the fourth direct current breaker (22) electrically connects the input of the second converter module and the first terminal of the second alternating current breaker (23);
a second end of the fourth direct current contactor (25) is electrically connected with an output end of the second converter module and a first end of the fifth direct current contactor (27) respectively;
a second end of the second alternating current breaker (23) is electrically connected with an external alternating current power supply, and a first end of the second alternating current breaker (23) is also electrically connected with an input end of the second converter module;
a second end of the fifth direct current contactor (27) is electrically connected with a second object to be charged, and a first end of the fifth direct current contactor (27) is also electrically connected with an output end of the second converter module;
and the second end of the sixth direct current contactor (24) is electrically connected with an external direct current power supply.
6. Charging and discharging device according to claim 5, characterised in that said second alternating current breaker (23) is interlocked with said fourth direct current breaker (22).
7. Charging and discharging device according to claim 6, characterised in that it further comprises a second alternating current contactor (26), a first end of said second alternating current contactor (26) being electrically connected to the input of said second inverter module, a second end of said second alternating current contactor (26) being electrically connected to a first end of said second alternating current breaker (23).
8. The charging and discharging device of claim 5, further comprising a controller in communication with the first inverter module, the first battery pack, the second inverter module, and the second battery pack, respectively, for controlling operation of the first inverter module, the first battery pack, the second inverter module, and the second battery pack.
9. Charging and discharging device according to claim 8, characterised in that said second direct current contactor (17) interlocks with said fifth direct current contactor (27) when said interconnection contactor (31) is closed.
10. The charging and discharging device of claim 9, wherein the controller comprises a main controller, a first sub-controller and a second sub-controller, the first sub-controller being communicatively connected to the main controller, the first battery pack and the first inverter module, respectively, for controlling the operation of the first battery pack and the first inverter module;
the second sub-controller is respectively in communication connection with the main controller, the second battery pack and the second converter module and is used for controlling the operation of the second battery pack and the second converter module;
the main controller is used for coordinating the cooperation between the first sub-controller and the second sub-controller.
11. A charging and discharging device, characterized in that the charging and discharging device comprises:
a first battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged;
a first converter module assembly including a first AC/DC module and a first DC/DC module, an input end of the first AC/DC module being connectable with an external alternating current power source, an output end of the first AC/DC module being selectively connectable to the first battery pack or a first object to be charged so as to convert alternating current of the external alternating current power source into direct current and thus charge the first battery pack or charge the first object to be charged; an input terminal of the first DC/DC module is connectable to the first battery pack, and an output terminal of the first DC/DC module is connectable to a first object to be charged, so that the first battery pack can charge the first object to be charged;
a second battery pack for storing electric energy and capable of being connected to an external direct current power source and thus charged;
a second converter module assembly including a second AC/DC module and a second DC/DC module, an input end of the second AC/DC module being connectable with an external alternating current power source, an output end of the second AC/DC module being selectively connectable to the second battery pack or a second object to be charged so as to convert alternating current of the external alternating current power source into direct current and thus charge the second battery pack or charge the second object to be charged; an input terminal of the second DC/DC module is connectable to the second battery pack, and an output terminal of the second DC/DC module is connectable to a second object to be charged, so that the second battery pack can charge the second object to be charged;
the charging and discharging equipment further comprises an interconnection contactor (31), wherein a first end of the interconnection contactor (31) is electrically connected with an output end of the first AC/DC module and/or the first DC/DC module, and a second end of the interconnection contactor (31) is electrically connected with an output end of the second AC/DC module and/or the second DC/DC module, so that the first AC/DC module and/or the first DC/DC module can be selectively connected with the second AC/DC module and/or the second DC/DC module in parallel.
12. Charging and discharging device according to claim 11, characterized in that it further comprises a first direct current breaker (11), a second direct current breaker (12), a first alternating current breaker (13), a first direct current contactor (15), a second direct current contactor (17) and a third direct current contactor (14),
wherein a first end of the first direct current breaker (11) is electrically connected with the first battery pack, and a second end of the first direct current breaker (11) is electrically connected with a first end of the second direct current breaker (12), a first end of the first direct current contactor (15) and a first end of the third direct current contactor (14) respectively;
the second terminal of the second direct current breaker (12) electrically connects the input of the first DC/DC module and the first terminal of the first alternating current breaker (13);
the second end of the first direct current contactor (15) is electrically connected with the output end of the first AC/DC module and the first end of the second direct current contactor (17) respectively;
the second end of the first alternating current breaker (13) is electrically connected with an external alternating current power supply, and the first end of the first alternating current breaker (13) is also electrically connected with the input end of the first AC/DC module;
the second end of the second direct current contactor (17) is electrically connected with a first object to be charged, and the first end of the second direct current contactor (17) is also electrically connected with the output end of the first DC/DC module;
and the second end of the third direct current contactor (14) is electrically connected with an external direct current power supply.
13. Charging and discharging device according to claim 12, characterised in that said first alternating current breaker (13) is interlocked with said second direct current breaker (12).
14. Charging and discharging device according to claim 13, characterised in that it further comprises a first alternating current contactor (16), a first terminal of said first alternating current contactor (16) being electrically connected to an input of said first AC/DC module and a second terminal of said first alternating current contactor (16) being electrically connected to a first terminal of said first alternating current breaker (13).
15. Charging and discharging device according to claim 12, characterized in that it further comprises a third direct current breaker (21), a fourth direct current breaker (22), a second alternating current breaker (23), a fourth direct current contactor (25), a fifth direct current contactor (27) and a sixth direct current contactor (24),
wherein a first end of the third direct current breaker (21) is electrically connected to the second battery pack, and a second end of the third direct current breaker (21) is electrically connected to a first end of the fourth direct current breaker (22), a first end of the fourth direct current contactor (25), and a first end of the sixth direct current contactor (24), respectively;
a second terminal of the fourth direct current breaker (22) electrically connects the input terminal of the second DC/DC module and the first terminal of the second alternating current breaker (23);
the second end of the fourth direct current contactor (25) is electrically connected with the output end of the second AC/DC module and the first end of the fifth direct current contactor (27) respectively;
a second end of the second alternating current breaker (23) is electrically connected with an external alternating current power supply, and a first end of the second alternating current breaker (23) is also electrically connected with an input end of the second AC/DC module;
the second end of the fifth direct current contactor (27) is electrically connected with a second object to be charged, and the first end of the fifth direct current contactor (27) is also electrically connected with the output end of the second DC/DC module;
and the second end of the sixth direct current contactor (24) is electrically connected with an external direct current power supply.
16. Charging and discharging device according to claim 15, characterised in that said second alternating current breaker (23) is interlocked with said fourth direct current breaker (22).
17. Charging and discharging device according to claim 16, characterised in that it further comprises a second alternating current contactor (26), a first terminal of said second alternating current contactor (26) being electrically connected to the input of said second AC/DC module and a second terminal of said second alternating current contactor (26) being electrically connected to the first terminal of said second alternating current breaker (23).
18. The charging and discharging device of claim 15, further comprising a controller in communication with the first inverter module assembly, the first battery pack, the second inverter module assembly, and the second battery pack, respectively, for controlling operation of the first inverter module assembly, the first battery pack, the second inverter module assembly, and the second battery pack.
19. Charging and discharging device according to claim 18, characterised in that said second direct current contactor (17) interlocks with said fifth direct current contactor (27) when said interconnection contactor (31) is closed.
20. The charging and discharging device of claim 19, wherein the controller comprises a main controller, a first sub-controller and a second sub-controller, the first sub-controller being communicatively coupled to the main controller, the first battery pack and the first inverter module assembly, respectively, for controlling operation of the first battery pack and the first inverter module assembly;
the second sub-controller is respectively in communication connection with the main controller, the second battery pack and the second converter module assembly and is used for controlling the operation of the second battery pack and the second converter module assembly;
the main controller is used for coordinating the cooperation between the first sub-controller and the second sub-controller.
21. A mobile charging cart, characterized in that it comprises a charging and discharging device according to any one of claims 1 to 20.
CN201710089566.XA 2017-02-20 2017-02-20 Charge and discharge equipment and mobile charging vehicle comprising same Active CN106786993B (en)

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