WO2014000649A1 - Charging system, vehicle comprising the same and method for controlling charging vehicle with the same - Google Patents

Charging system, vehicle comprising the same and method for controlling charging vehicle with the same Download PDF

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Publication number
WO2014000649A1
WO2014000649A1 PCT/CN2013/078030 CN2013078030W WO2014000649A1 WO 2014000649 A1 WO2014000649 A1 WO 2014000649A1 CN 2013078030 W CN2013078030 W CN 2013078030W WO 2014000649 A1 WO2014000649 A1 WO 2014000649A1
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WO
WIPO (PCT)
Prior art keywords
charging
switch
battery
terminal
unit
Prior art date
Application number
PCT/CN2013/078030
Other languages
French (fr)
Inventor
Guangming Yang
Xiaohui Zhang
Zheqing TANG
Jian Liu
Original Assignee
Shenzhen Byd Auto R&D Company Limited
Byd Company Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201220303636XU external-priority patent/CN202712941U/en
Application filed by Shenzhen Byd Auto R&D Company Limited, Byd Company Limited filed Critical Shenzhen Byd Auto R&D Company Limited
Priority to US14/411,360 priority Critical patent/US10086716B2/en
Priority to EP13809408.1A priority patent/EP2867975B1/en
Publication of WO2014000649A1 publication Critical patent/WO2014000649A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/11—DC charging controlled by the charging station, e.g. mode 4
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/65—Monitoring or controlling charging stations involving identification of vehicles or their battery types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/67—Controlling two or more charging stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/549—Current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2250/00—Driver interactions
    • B60L2250/10—Driver interactions by alarm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/20—Inrush current reduction, i.e. avoiding high currents when connecting the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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
    • 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
    • Y02T90/14—Plug-in electric vehicles
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Definitions

  • the present disclosure relates to the field of vehicle charging, more particularly to a charging system for a vehicle, a vehicle comprising the charging system, and a method for controlling charging a vehicle with the charging system.
  • the charging of the electric vehicle depends on one charging connector (also referred to as a charging coupler). In this way, a charging time is very long, which causes an inconvenience for consumers when using the electric vehicle.
  • Embodiments of the present disclosure seek to solve at least one of the problems existing in the prior art to at least some extent.
  • a charging system for a vehicle comprises: a battery; a first charging branch comprising a first rectifying unit and a first charging interface, in which the battery is connected with the first charging interface via the first rectifying unit; a second charging branch comprising a second rectifying unit and a second charging interface, in which the battery is connected with the second charging interface via the second rectifying unit; and a control unit connected with the first rectifying unit and the second rectifying unit respectively and configured to control the first charging branch and the second charging branch to charge the battery.
  • the charging system further comprises a battery management unit.
  • the control unit is configured to send a first signal to the battery management unit when the first charging interface is connected with a first charging connector and the second charging interface is connected with a second charging connector.
  • the battery management unit is configured to judge whether the battery needs to be charged after receiving the first signal, and to send a second signal to the control unit when the battery needs to be charged.
  • the control unit is further configured to control the first charging branch and the second charging branch to charge the battery after receiving the second signal.
  • a vehicle comprising the charging system according to the first aspect of the present disclosure is provided.
  • a method for controlling charging a vehicle with a charging system comprises: a battery, a first charging branch comprising a first rectifying unit and a first charging interface, a second charging branch comprising a second rectifying unit and a second charging interface, a control unit, and a battery management unit.
  • the method comprises: sending a first signal to the battery management unit when the first charging interface is connected with a first charging connector and the second charging interface is connected with a second charging connector; judging by the battery management unit whether the battery needs to be charged after receiving the first signal; if yes, sending a second signal to the control unit by the battery management unit; and controlling the first charging branch and the second charging branch to charge the battery after receiving the second signal.
  • the control unit controls the first charging branch and the second charging branch to charge the battery, thus increasing a charging power of the electric vehicle and reducing a charging time significantly. As a fast charging can be performed, the time cost of charging a vehicle can be reduced.
  • Fig. 1 is a block diagram of a charging system for a vehicle according to an embodiment of the present disclosure
  • Fig. 2 is a circuit diagram of a charging system for a vehicle according to a preferred embodiment of the present disclosure
  • Fig. 3 is a flow chart of a method for controlling charging a vehicle with a charging system according to an embodiment of the present disclosure.
  • Fig. 4 is a flow chart of a method for controlling charging a vehicle with a charging system according to a preferred embodiment of the present disclosure.
  • the charging system for the vehicle comprises: a battery 1 ; a first charging branch 2 comprising a first rectifying unit 21 and a first charging interface 22, in which the battery 1 is connected with the first charging interface 22 via the first rectifying unit 21; a second charging branch 3 comprising a second rectifying unit 31 and a second charging interface 32, in which the battery 1 is connected with the second charging interface 32 via the second rectifying unit 31; and a control unit 4 connected with the first rectifying unit 21 and the second rectifying unit 31 respectively and configured to control the first charging branch 2 and the second charging branch 3 to charge the battery 1.
  • the charging system further comprises: a first switch Kl having a first terminal connected with the battery 1 and a second terminal connected with the first rectifying unit 21 and the second rectifying unit 31 respectively, a second switch K2 connected between the first rectifying unit 21 and the first charging interface 22, and a third switch K3 connected between the second rectifying unit 31 and the second charging interface 32.
  • the charging system further comprises a battery management unit 9.
  • the battery management unit 9 is connected with the control unit 4 and the battery 1 respectively.
  • the control unit 4 is configured to send a first signal to the battery management unit 9 when the first charging interface 22 is connected with a first charging connector and the second charging interface 32 is connected with a second charging connector.
  • the battery management unit 9 is configured to judge whether the battery 1 needs to be charged after receiving the first signal, and to send a second signal to the control unit 4 when the battery 1 needs to be charged.
  • the control unit 4 is further configured to control the first charging branch 2 and the second charging branch 3 to charge the battery 1 after receiving the second signal.
  • first charging connector and the second charging connector may be connected with one charging pile or may be connected with two charging piles respectively, without particular limits.
  • the battery management unit 9 is configured to send a second signal to the control unit 4 when the first charging interface 22 is connected with a first charging connector and the second charging interface 32 is connected with a second charging connector.
  • the control unit 4 is further configured to control the first charging branch 2 and the second charging branch 3 to charge the battery 1 after receiving the second signal.
  • the step of sending the first signal and judging whether the battery 1 needs to be charged is omitted.
  • receiving the second signal in the present disclosure is not limited by the above mentioned embodiments. In practice, those skilled in the art may design any other method to make the control unit 4 receive the second signal provided that the same function can be implemented, the details of which are omitted here.
  • control unit controls the control unit
  • the first charging branch 2 further comprises a first transforming unit 5 connected between the battery 1 and the first rectifying unit 21, and the second charging branch 3 further comprises a second transforming unit 6 connected between the battery 1 and the second rectifying unit 31.
  • Both the first transforming unit 5 and the second transforming unit 6 are configured to convert an initial voltage from the grid which does not match with a voltage of the battery 1 to a transformed voltage which matches with the voltage of the battery 1.
  • the charging system further comprises a first fuse FU1 connected between the first rectifying unit 21 and the first charging interface 22, and a second fuse FU2 connected between the second rectifying unit 31 and the second charging interface 32.
  • the first fuse FU1 and the second fuse FU2 are configured to disconnect a circuit in the charging system when a current in the charging system is too large, thus protecting the charging system from being damaged.
  • the charging system further comprises a first filter unit 7 connected between the first rectifying unit 21 and the first charging interface 22, and a second filter unit 8 connected between the second rectifying unit 31 and the second charging interface 32.
  • the first filter unit 7 and the second filter unit 8 are configured to filter out a high-frequency clutter input from the grid, thus enhancing an operation stability of the charging system.
  • the charging system for the vehicle comprises: a battery 1, a first switch Kl, a second switch K2, a third switch K3, a first pre-charging resistor Rl, a first pre-charging switch Kll, a second pre-charging resistor R2, a second pre-charging switch K12, a third pre-charging resistor R3, a third pre-charging switch K13, a first transforming unit 5, a second transforming unit 6, a first rectifying unit 21, a second rectifying unit 31, a first filter unit 7, a second filter unit 8, a first fuse FU1, a second fuse FU2, a first charging interface 22, a second charging interface 32, a control unit 4, and a battery management unit 9.
  • a first terminal of the first switch Kl is connected with the battery 1
  • a second terminal of the first switch Kl is connected with a first terminal of the first transforming unit 5
  • a second terminal of the first transforming unit 5 is connected with a first terminal of the first rectifying unit 21
  • a second terminal of the first rectifying unit 21 is connected with a first terminal of the first filter unit 7
  • a second terminal of the first filter unit 7 is connected with a first terminal of the second switch K2
  • a second terminal of the second switch K2 is connected with a first terminal of the first fuse FU1
  • a second terminal of the first fuse FU1 is connected with the first charging interface 22.
  • the second terminal of the first switch Kl is connected with a first terminal of the second transforming unit 6, a second terminal of the second transforming unit 6 is connected with a first terminal of the second rectifying unit 31, a second terminal of the second rectifying unit 31 is connected with a first terminal of the second filter unit 8, a second terminal of the second filter unit 8 is connected with a first terminal of the third switch K3, a second terminal of the third switch K3 is connected with a first terminal of the second fuse FU2, and a second terminal of the second fuse FU2 is connected with the second charging interface 32.
  • a first terminal of the first pre-charging resistor Rl is connected with a first terminal of the first pre-charging switch Kll, and a second terminal of the first pre-charging resistor Rl and a second terminal of the first pre-charging switch Kll are connected with the first switch Kl respectively.
  • a first terminal of the second pre-charging resistor R2 is connected with a first terminal of the second pre-charging switch K12, and a second terminal of the second pre-charging resistor R2 and a second terminal of the second pre-charging switch K12 are connected with the second switch K2 respectively.
  • a first terminal of the third pre-charging resistor R3 is connected with a first terminal of the third pre-charging switch K13, and a second terminal of the third pre-charging resistor R3 and a second terminal of the third pre-charging switch K13 are connected with the third switch K3 respectively.
  • control unit 4 is connected with the first transforming unit 5, the second transforming unit 6, the first rectifying unit 21, and the second rectifying unit 31 respectively.
  • the first transforming unit 5 comprises a first capacitor Cll, a second capacitor CI 2, a first inductor Lll, a first switching tube Qll, and a second switching tube Q12.
  • a first terminal of the first inductor Lll is connected with the second terminal of the first switch Kl and a first terminal of the first capacitor Cll respectively
  • a second terminal of the first inductor Lll is connected with a second terminal of the first switching tube Qll and a first terminal of the second switching tube Q12 respectively
  • a first terminal of the first switching tube Qll is connected with a first terminal of the second capacitor CI 2
  • a second terminal of the first capacitor Cll is connected with a second terminal of the second capacitor CI 2 and a second terminal of the second switching tube Q12 respectively.
  • the second transforming unit 6 comprises a third capacitor C21, a fourth capacitor C22, a second inductor L21, a third switching tube Q21, and a fourth switching tube Q22.
  • a connection relation of these elements in the second transforming unit 6 is similar to that of elements in the first transforming unit 5, and thus detailed description of the same is omitted here.
  • the first rectifying unit 21 is a three-phase full-bridge circuit consisting of six switching tubes Q13, Q14, Q15, Q16, Q17, and Q18.
  • the second rectifying unit 31 is a three-phase full-bridge circuit consisting of six switching tubes Q23, Q24, Q25, Q26, Q27, and Q28.
  • the first filter unit 7 is consisting of a third inductor L12, a fourth inductor L13, a fifth inductor L14, a fifth capacitor C13, a sixth capacitor C14, and a seventh capacitor C15, which are connected in a relation as shown in Fig. 2.
  • the second filter unit 8 is consisting of a sixth inductor L22, a seventh inductor L23, an eighth inductor L24, an eighth capacitor C23, a ninth capacitor C24, and a tenth capacitor C25, which are connected in a relation as shown in Fig. 2.
  • the control unit 4 controls the first pre-charging switch Kll to be switched on and the first switch Kl, the second switch K2, and the third switch K3 to be switched off to perform a first pre-charging.
  • the control unit 4 detects a first voltage VI between terminals of the second capacitor C12 and a second voltage V2 between terminals of the fourth capacitor C22, and judges whether a difference between the first voltage VI and a first predetermined voltage is within a second predetermined voltage range (for example, 50V) and a pre-charging time is within a first predetermined time range (for example, 5S), and whether a difference between the second voltage V2 and a second predetermined voltage is within the second predetermined voltage range and the pre-charging time is within the first predetermined time range; if yes, the control unit 4 judges the first pre-charging is successful; and if no, the control unit 4 judges the first pre-charging is failed. In this way, a rapid voltage increase between terminals of the second capacitor C12 or the fourth capacitor C22 which causes a large current impact in the circuit may be avoided, thus preventing damages to the charging system resulted from the large current impact.
  • a second predetermined voltage range for example, 50V
  • a pre-charging time for example
  • a failure self-test may also be performed for a first circuit between the battery 1 and the first transforming unit 5 and for a second circuit between the battery 1 and the second transforming unit 6. If the control unit 4 judges the first pre-charging is successful, it can be determined that elements or components in the first circuit and the second circuit run normally. If the control unit 4 judges the first pre-charging is failed, it is determined that there is a failure in the first circuit or the second circuit, and thus the user may be reminded that the charging system needs to be repaired.
  • control unit 4 judges the first pre-charging is successful, the control unit 4 controls the first pre-charging switch Kll, the second switch K2, and the third switch K3 to be switched off, and the first switch Kl, the second pre-charging switch K12, and the third pre-charging switch K13 to be switched on to perform a second pre-charging.
  • the control unit 4 detects a third voltage V3 between terminals of the second capacitor C12 and a fourth voltage V4 between terminals of the fourth capacitor C22, and judges whether the third voltage is within a third predetermined voltage range and the fourth voltage V4 is within a fourth predetermined voltage range; if yes, the control unit 4 judges the second pre-charging is successful; and if no, the control unit 4 judges the second pre-charging is failed. In this way, a rapid voltage increase between terminals of the second capacitor C12 or the fourth capacitor C22 which causes a large current impact in the circuit may be avoided, thus preventing damages to the charging system in resulted from the large current impact.
  • a failure self-test may also be performed for a third circuit between the first rectifying unit 21 and the first charging interface 22 and for a fourth circuit between the second rectifying unit 31 and the second charging interface 32. If the control unit 4 judges the second pre-charging is successful, it can be determined that elements or components in the third circuit and the fourth circuit run normally. If the control unit 4 judges the second pre-charging is failed, it can be determined that there is a failure in the third circuit or the fourth circuit, and thus the user may be reminded that the charging system needs to be repaired.
  • the control unit 4 controls the second pre-charging switch K12 and the third pre-charging switch K13 to be switched off, and the second switch K2 and the third switch K3 to be switched on, and controls the first charging branch 2 and the second charging branch 3 to charge the battery 1.
  • a first voltage from the grid is input to the first charging branch 2 via the first charging interface 22, the first filter unit 7 filters the first voltage to provide a filtered voltage, the first rectifying unit 21 rectifies the filtered voltage to provide a rectified voltage, and then the first transforming unit 5 reduces the rectified voltage to provide a reduced voltage to charge the battery 1.
  • a second voltage from the grid is input to the second charging branch 3 via the second charging interface 32, the second filter unit 8 filters the second voltage to provide a filtered voltage, the second rectifying unit 31 rectifies the filtered voltage to provide a rectified voltage, and then the second transforming unit 6 reduces the rectified voltage to provide a reduced voltage to charge the battery 1.
  • the first pre-charging and the second pre-charging are performed before the battery 1 is charged, which not only performs the failure self-test for the whole charging system, but also improves a stability of the charging system.
  • the rapid voltage increase between terminals of the second capacitor C12 and terminals of the fourth capacitor C22 which may cause the large current impact in the circuit may be avoided, thus preventing the damages to the charging system resulted from the large current impact .
  • a vehicle comprising the charging system described above is also provided.
  • a method for controlling charging a vehicle with a charging system comprises: a battery, a first charging branch comprising a first rectifying unit and a first charging interface, a second charging branch comprising a second rectifying unit and a second charging interface, a control unit, and a battery management unit.
  • the method comprises the following steps.
  • step S301 the control unit sends a first signal to the battery management unit when the first charging interface is connected with a first charging connector and the second charging interface is connected with a second charging connector.
  • step S302 the battery management unit detects the battery and judges whether the battery needs to be charged after receiving the first signal. If yes, step S303 is performed.
  • step S303 the battery management unit sends a second signal to the control unit.
  • step S304 the control unit controls the first charging branch and the second charging branch to charge the battery after receiving the second signal.
  • the method further comprises at least one of the following steps.
  • step A the battery management unit detects a voltage of the battery and judges whether the voltage is within a first predetermined voltage range. If yes, step S303 is performed.
  • step B the battery management unit detects a temperature of the battery and judges whether the temperature is within a predetermined temperature range. If yes, step S303 is performed.
  • the method further comprises the following step.
  • step A the battery management unit detects a voltage of the battery and judges whether the voltage is within a first predetermined voltage range. If yes, step B is performed.
  • step B the battery management unit detects a temperature of the battery and judges whether the temperature is within a predetermined temperature range. If yes, step S303 is performed.
  • the battery management unit judges whether the temperature is within a predetermined temperature range. If the temperature is within the predetermined temperature range, the battery management unit detects a voltage of the battery and judges whether the voltage is within a first predetermined voltage range. If the voltage is within the first predetermined voltage range, step S303 is performed.
  • step A an over-high voltage of the battery may be prevented, thus ensuring the operation safety of the charging system.
  • step B an over-high temperature of the battery may be prevented, and thus the operation safety of the charging system may be ensured.
  • the charging system further comprises: a first transforming unit, a second transforming unit, a first switch having a first terminal connected with the battery and a second terminal connected with the first rectifying unit via the first transforming unit and connected with the second rectifying unit via the second transforming unit, a second switch connected between the first rectifying unit and the first charging interface, a third switch connected between the second rectifying unit and the second charging interface, and a first pre-charging resistor and a first pre-charging switch, in which a first terminal of the first pre-charging resistor is connected with a first terminal of the first pre-charging switch, and a second terminal of the first pre-charging resistor and a second terminal of the first pre-charging switch are connected with the first switch respectively.
  • the step S304 comprises the following steps.
  • step CI the control unit controls the first pre-charging switch to be switched on and the first switch, the second switch, and the third switch to be switched off to perform a first pre-charging after receiving the second signal.
  • step C2 the control unit judges whether a first difference between the first busbar voltage VI of the first charging branch and a first predetermined voltage is within a second predetermined voltage range and a pre-charging time is within a first predetermined time range, and whether a second difference between the second busbar voltage V2 of the second charging branch and a second predetermined voltage is within the second predetermined voltage range and the pre-charging time is within the first predetermined time range.
  • step C3 if yes, the control unit controls the first pre-charging switch to be switched off, and the first switch, the second switch and the third switch to be switched on.
  • step C4 the control unit controls the first charging branch and the second charging branch to charge the battery.
  • the charging system further comprises: a second pre-charging resistor and a second pre-charging switch, in which a first terminal of the second pre-charging resistor is connected with a first terminal of the second pre-charging switch, and a second terminal of the second pre-charging resistor and a second terminal of the second pre-charging switch are connected with the second switch respectively; and a third pre-charging resistor and a third pre-charging switch, in which a first terminal of the third pre-charging resistor is connected with a first terminal of the third pre-charging switch, and a second terminal of the third pre-charging resistor and a second terminal of the third pre-charging switch are connected with the third switch respectively.
  • the method further comprises the following steps.
  • step Dl the control unit controls the first pre-charging switch, the second switch, and the third switch to be switched off, and the first switch, the second pre-charging switch, and the third pre-charging switch to be switched on to perform a second pre-charging.
  • step D2 the control unit judges whether the third busbar voltage V3 of the first charging branch is within a third predetermined voltase range and the fourth busbar voltage V4 of the second charging branch is within a fourth predetermined voltage range. If yes, the control unit controls the second pre-charging switch and the third pre-charging switch to be switched off and the second switch and the third switch to be switched on, and the step C4 is performed.
  • the method further comprises the following steps.
  • step E the battery management unit judges whether the battery is fully charged. If yes, the battery management unit sends a third signal to the control unit.
  • step F the control unit controls the first charging branch and the second charging branch to stop charging the battery after receiving the third signal.
  • the battery management unit detects an electric quantity, a current, or a voltage of the battery so as to determine or judge whether the battery is fully charged.
  • the battery management unit detects an electric quantity, a current, or a voltage of the battery so as to determine or judge whether the battery is fully charged.
  • a flow chart of the method for controlling charging the vehicle with the charging system is provided. Referring to Fig. 4, the method comprises the following steps.
  • step S401 the control unit sends a first signal to the battery management unit when the first charging interface is connected with a first charging connector and the second charging interface is connected with a second charging connector.
  • step S402 the battery management unit judges whether the battery needs to be charged after receiving the first signal.
  • step S403 if yes, the battery management unit sends a second signal to the control unit.
  • step S404 the control unit controls the first pre-charging switch to be switched on and the first switch, the second switch, and the third switch to be switched off to perform a first pre-charging after receiving the second signal.
  • step S405 the control unit judges whether a first difference between the first busbar voltage VI of the first charging branch and a first predetermined voltage is within a second predetermined voltage range and a pre-charging time is within a first predetermined time range, and whether a second difference between the second busbar voltage V2 of the second charging branch and a second predetermined voltage is within the second predetermined voltage range and the pre-charging time is within the first predetermined time range, i.e., judges whether the first pre-charging is successful.
  • step S406 if yes, the control unit controls the first pre-charging switch, the second switch, and the third switch to be switched off, and the first switch, the second pre-charging switch, and the third pre-charging switch to be switched on to perform a second pre-charging.
  • step S407 the control unit judges whether the third busbar voltage V3 of the first charging branch is within a third predetermined voltage range and the fourth busbar voltage V4 of the second charging branch is within a fourth predetermined voltage range, i.e., judges whether the second pre-charging is successful.
  • step S408 if yes, the control unit controls the second pre-charging switch and the third pre-charging switch to be switched off, and the second switch and the third switch to be switched on, and controls the first charging branch and the second charging branch to charge the battery.
  • the first pre-charging and the second pre-charging are performed before the battery is charged, which not only performs the failure self-test for the whole charging system, but also improves a stability of the charging system.
  • the rapid voltage increase between terminals of the second capacitor C12 and terminals of the fourth capacitor C22 which may cause the large current impact in the circuit may be avoided, thus preventing the damages to the charging system resulted from the large current impact.

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Abstract

A charging system for a vehicle, a vehicle comprising the charging system, and a method for controlling charging a vehicle with the charging system are provided. The charging system comprises: a battery (1); a first charging branch (2) comprising a first rectifying unit (21) and a first charging interface (22), in which the battery (1) is connected with the first charging interface (22) via the first rectifying unit (21); a second charging branch (3) comprising a second rectifying unit (31) and a second charging interface (32), in which the battery (1) is connected with the second charging interface (32) via the second rectifying unit (31); and a control unit (4) connected with the first rectifying unit (21) and the second rectifying unit (31) respectively and configured to control the first charging branch (2) and the second charging branch (3) to charge the battery (1).

Description

CHARGING SYSTEM, VEHICLE COMPRISING THE SAME AND METHOD FOR CONTROLLING CHARGING VEHICLE WITH THE SAME
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority to and benefits of Chinese Patent Application Serial No.
201210214502.5 and Chinese Patent Application Serial No. 201220303636.X, both filed with the State Intellectual Property Office of P. R. China on June 27, 2012, the entire contents of which are incorporated herein by reference. FIELD
The present disclosure relates to the field of vehicle charging, more particularly to a charging system for a vehicle, a vehicle comprising the charging system, and a method for controlling charging a vehicle with the charging system. BACKGROUND
With the development of the science and technology, electric vehicles are taking the place of conventional fuel vehicles. However, the application of the electric vehicle is limited by some disadvantages. Currently, the electric vehicle is generally charged with only one charging branch.
That is, the charging of the electric vehicle depends on one charging connector (also referred to as a charging coupler). In this way, a charging time is very long, which causes an inconvenience for consumers when using the electric vehicle.
SUMMARY
Embodiments of the present disclosure seek to solve at least one of the problems existing in the prior art to at least some extent.
According to a first aspect of the present disclosure, a charging system for a vehicle is provided. The charging system for the vehicle comprises: a battery; a first charging branch comprising a first rectifying unit and a first charging interface, in which the battery is connected with the first charging interface via the first rectifying unit; a second charging branch comprising a second rectifying unit and a second charging interface, in which the battery is connected with the second charging interface via the second rectifying unit; and a control unit connected with the first rectifying unit and the second rectifying unit respectively and configured to control the first charging branch and the second charging branch to charge the battery.
In some embodiments, the charging system further comprises a battery management unit. The control unit is configured to send a first signal to the battery management unit when the first charging interface is connected with a first charging connector and the second charging interface is connected with a second charging connector. The battery management unit is configured to judge whether the battery needs to be charged after receiving the first signal, and to send a second signal to the control unit when the battery needs to be charged. The control unit is further configured to control the first charging branch and the second charging branch to charge the battery after receiving the second signal.
According to a second aspect of the present disclosure, a vehicle comprising the charging system according to the first aspect of the present disclosure is provided.
According to a third aspect of the present disclosure, a method for controlling charging a vehicle with a charging system is provided. The charging system comprises: a battery, a first charging branch comprising a first rectifying unit and a first charging interface, a second charging branch comprising a second rectifying unit and a second charging interface, a control unit, and a battery management unit. The method comprises: sending a first signal to the battery management unit when the first charging interface is connected with a first charging connector and the second charging interface is connected with a second charging connector; judging by the battery management unit whether the battery needs to be charged after receiving the first signal; if yes, sending a second signal to the control unit by the battery management unit; and controlling the first charging branch and the second charging branch to charge the battery after receiving the second signal.
With the charging system and the method according to embodiments of the present disclosure, the control unit controls the first charging branch and the second charging branch to charge the battery, thus increasing a charging power of the electric vehicle and reducing a charging time significantly. As a fast charging can be performed, the time cost of charging a vehicle can be reduced.
The above summary of the present disclosure is not intended to describe each disclosed embodiment or every implementation of the present disclosure. The Figures and the detailed description which follow more particularly exemplify illustrative embodiments. Additional aspects and advantages of embodiments of present disclosure will be given in part in the following descriptions, become apparent in part from the following descriptions, or be learned from the practice of the embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
These and other aspects and advantages of embodiments of the present disclosure will become apparent and more readily appreciated from the following descriptions made with reference to the accompanying drawings, in which:
Fig. 1 is a block diagram of a charging system for a vehicle according to an embodiment of the present disclosure;
Fig. 2 is a circuit diagram of a charging system for a vehicle according to a preferred embodiment of the present disclosure;
Fig. 3 is a flow chart of a method for controlling charging a vehicle with a charging system according to an embodiment of the present disclosure; and
Fig. 4 is a flow chart of a method for controlling charging a vehicle with a charging system according to a preferred embodiment of the present disclosure.
DETAILED DESCRIPTION
Reference will be made in detail to embodiments of the present disclosure. The embodiments described herein with reference to drawings are explanatory, illustrative, and used to generally understand the present disclosure. The embodiments shall not be construed to limit the present disclosure. The same or similar elements and the elements having same or similar functions are denoted by like reference numerals throughout the descriptions.
Referring to Figs. 1-2, a charging system for a vehicle will be described in detail as below. As shown in Fig. 1, according to an embodiment of the present disclosure, the charging system for the vehicle comprises: a battery 1 ; a first charging branch 2 comprising a first rectifying unit 21 and a first charging interface 22, in which the battery 1 is connected with the first charging interface 22 via the first rectifying unit 21; a second charging branch 3 comprising a second rectifying unit 31 and a second charging interface 32, in which the battery 1 is connected with the second charging interface 32 via the second rectifying unit 31; and a control unit 4 connected with the first rectifying unit 21 and the second rectifying unit 31 respectively and configured to control the first charging branch 2 and the second charging branch 3 to charge the battery 1.
In some embodiments, the charging system further comprises: a first switch Kl having a first terminal connected with the battery 1 and a second terminal connected with the first rectifying unit 21 and the second rectifying unit 31 respectively, a second switch K2 connected between the first rectifying unit 21 and the first charging interface 22, and a third switch K3 connected between the second rectifying unit 31 and the second charging interface 32.
In some embodiments, the charging system further comprises a battery management unit 9.
The battery management unit 9 is connected with the control unit 4 and the battery 1 respectively.
The control unit 4 is configured to send a first signal to the battery management unit 9 when the first charging interface 22 is connected with a first charging connector and the second charging interface 32 is connected with a second charging connector. The battery management unit 9 is configured to judge whether the battery 1 needs to be charged after receiving the first signal, and to send a second signal to the control unit 4 when the battery 1 needs to be charged. The control unit 4 is further configured to control the first charging branch 2 and the second charging branch 3 to charge the battery 1 after receiving the second signal.
Those skilled in the art will appreciate that, the first charging connector and the second charging connector may be connected with one charging pile or may be connected with two charging piles respectively, without particular limits.
In some embodiments, the battery management unit 9 is configured to send a second signal to the control unit 4 when the first charging interface 22 is connected with a first charging connector and the second charging interface 32 is connected with a second charging connector. The control unit 4 is further configured to control the first charging branch 2 and the second charging branch 3 to charge the battery 1 after receiving the second signal. Specifically, in the present embodiment, the step of sending the first signal and judging whether the battery 1 needs to be charged is omitted.
Those with ordinary skill will appreciate that, receiving the second signal in the present disclosure is not limited by the above mentioned embodiments. In practice, those skilled in the art may design any other method to make the control unit 4 receive the second signal provided that the same function can be implemented, the details of which are omitted here.
With the charging system according to embodiments of the present disclosure, the control unit
4 controls the first charging branch 2 and the second charging branch 3 to charge the battery 1, thus increasing a charging power of the electric vehicle and reducing a charging time significantly. As a fast charging can be performed, the time cost of charging a vehicle can be reduced.
In some embodiments, the first charging branch 2 further comprises a first transforming unit 5 connected between the battery 1 and the first rectifying unit 21, and the second charging branch 3 further comprises a second transforming unit 6 connected between the battery 1 and the second rectifying unit 31. Both the first transforming unit 5 and the second transforming unit 6 are configured to convert an initial voltage from the grid which does not match with a voltage of the battery 1 to a transformed voltage which matches with the voltage of the battery 1.
In some embodiments, the charging system further comprises a first fuse FU1 connected between the first rectifying unit 21 and the first charging interface 22, and a second fuse FU2 connected between the second rectifying unit 31 and the second charging interface 32. The first fuse FU1 and the second fuse FU2 are configured to disconnect a circuit in the charging system when a current in the charging system is too large, thus protecting the charging system from being damaged.
In some embodiments, the charging system further comprises a first filter unit 7 connected between the first rectifying unit 21 and the first charging interface 22, and a second filter unit 8 connected between the second rectifying unit 31 and the second charging interface 32. The first filter unit 7 and the second filter unit 8 are configured to filter out a high-frequency clutter input from the grid, thus enhancing an operation stability of the charging system.
According to a preferred embodiment of the present disclosure, as shown in Fig. 2, the charging system for the vehicle comprises: a battery 1, a first switch Kl, a second switch K2, a third switch K3, a first pre-charging resistor Rl, a first pre-charging switch Kll, a second pre-charging resistor R2, a second pre-charging switch K12, a third pre-charging resistor R3, a third pre-charging switch K13, a first transforming unit 5, a second transforming unit 6, a first rectifying unit 21, a second rectifying unit 31, a first filter unit 7, a second filter unit 8, a first fuse FU1, a second fuse FU2, a first charging interface 22, a second charging interface 32, a control unit 4, and a battery management unit 9.
Specifically, as shown in Fig. 2, a first terminal of the first switch Kl is connected with the battery 1, a second terminal of the first switch Kl is connected with a first terminal of the first transforming unit 5, a second terminal of the first transforming unit 5 is connected with a first terminal of the first rectifying unit 21, a second terminal of the first rectifying unit 21 is connected with a first terminal of the first filter unit 7, a second terminal of the first filter unit 7 is connected with a first terminal of the second switch K2, a second terminal of the second switch K2 is connected with a first terminal of the first fuse FU1, and a second terminal of the first fuse FU1 is connected with the first charging interface 22. Further, the second terminal of the first switch Kl is connected with a first terminal of the second transforming unit 6, a second terminal of the second transforming unit 6 is connected with a first terminal of the second rectifying unit 31, a second terminal of the second rectifying unit 31 is connected with a first terminal of the second filter unit 8, a second terminal of the second filter unit 8 is connected with a first terminal of the third switch K3, a second terminal of the third switch K3 is connected with a first terminal of the second fuse FU2, and a second terminal of the second fuse FU2 is connected with the second charging interface 32.
Referring to Fig. 2, a first terminal of the first pre-charging resistor Rl is connected with a first terminal of the first pre-charging switch Kll, and a second terminal of the first pre-charging resistor Rl and a second terminal of the first pre-charging switch Kll are connected with the first switch Kl respectively. A first terminal of the second pre-charging resistor R2 is connected with a first terminal of the second pre-charging switch K12, and a second terminal of the second pre-charging resistor R2 and a second terminal of the second pre-charging switch K12 are connected with the second switch K2 respectively. A first terminal of the third pre-charging resistor R3 is connected with a first terminal of the third pre-charging switch K13, and a second terminal of the third pre-charging resistor R3 and a second terminal of the third pre-charging switch K13 are connected with the third switch K3 respectively.
Referring to Fig. 2, the control unit 4 is connected with the first transforming unit 5, the second transforming unit 6, the first rectifying unit 21, and the second rectifying unit 31 respectively.
Referring to Fig. 2, in some embodiments, the first transforming unit 5 comprises a first capacitor Cll, a second capacitor CI 2, a first inductor Lll, a first switching tube Qll, and a second switching tube Q12. A first terminal of the first inductor Lll is connected with the second terminal of the first switch Kl and a first terminal of the first capacitor Cll respectively, a second terminal of the first inductor Lll is connected with a second terminal of the first switching tube Qll and a first terminal of the second switching tube Q12 respectively, a first terminal of the first switching tube Qll is connected with a first terminal of the second capacitor CI 2, and a second terminal of the first capacitor Cll is connected with a second terminal of the second capacitor CI 2 and a second terminal of the second switching tube Q12 respectively. Similarly, the second transforming unit 6 comprises a third capacitor C21, a fourth capacitor C22, a second inductor L21, a third switching tube Q21, and a fourth switching tube Q22. As shown in Fig. 2, a connection relation of these elements in the second transforming unit 6 is similar to that of elements in the first transforming unit 5, and thus detailed description of the same is omitted here.
Referring to Fig. 2, the first rectifying unit 21 is a three-phase full-bridge circuit consisting of six switching tubes Q13, Q14, Q15, Q16, Q17, and Q18. Similarly, the second rectifying unit 31 is a three-phase full-bridge circuit consisting of six switching tubes Q23, Q24, Q25, Q26, Q27, and Q28.
In some embodiments, the first filter unit 7 is consisting of a third inductor L12, a fourth inductor L13, a fifth inductor L14, a fifth capacitor C13, a sixth capacitor C14, and a seventh capacitor C15, which are connected in a relation as shown in Fig. 2. Similarly, the second filter unit 8 is consisting of a sixth inductor L22, a seventh inductor L23, an eighth inductor L24, an eighth capacitor C23, a ninth capacitor C24, and a tenth capacitor C25, which are connected in a relation as shown in Fig. 2.
An operation principle of the charging system for the vehicle according to embodiments of the present disclosure will be described in details as below.
When the first charging interface 22 is connected with the first charging connector and the second charging interface 32 is connected with the second charging connector, the control unit 4 controls the first pre-charging switch Kll to be switched on and the first switch Kl, the second switch K2, and the third switch K3 to be switched off to perform a first pre-charging. The control unit 4 detects a first voltage VI between terminals of the second capacitor C12 and a second voltage V2 between terminals of the fourth capacitor C22, and judges whether a difference between the first voltage VI and a first predetermined voltage is within a second predetermined voltage range (for example, 50V) and a pre-charging time is within a first predetermined time range (for example, 5S), and whether a difference between the second voltage V2 and a second predetermined voltage is within the second predetermined voltage range and the pre-charging time is within the first predetermined time range; if yes, the control unit 4 judges the first pre-charging is successful; and if no, the control unit 4 judges the first pre-charging is failed. In this way, a rapid voltage increase between terminals of the second capacitor C12 or the fourth capacitor C22 which causes a large current impact in the circuit may be avoided, thus preventing damages to the charging system resulted from the large current impact.
With the steps of the first pre-charging, a failure self-test may also be performed for a first circuit between the battery 1 and the first transforming unit 5 and for a second circuit between the battery 1 and the second transforming unit 6. If the control unit 4 judges the first pre-charging is successful, it can be determined that elements or components in the first circuit and the second circuit run normally. If the control unit 4 judges the first pre-charging is failed, it is determined that there is a failure in the first circuit or the second circuit, and thus the user may be reminded that the charging system needs to be repaired.
If the control unit 4 judges the first pre-charging is successful, the control unit 4 controls the first pre-charging switch Kll, the second switch K2, and the third switch K3 to be switched off, and the first switch Kl, the second pre-charging switch K12, and the third pre-charging switch K13 to be switched on to perform a second pre-charging. The control unit 4 detects a third voltage V3 between terminals of the second capacitor C12 and a fourth voltage V4 between terminals of the fourth capacitor C22, and judges whether the third voltage is within a third predetermined voltage range and the fourth voltage V4 is within a fourth predetermined voltage range; if yes, the control unit 4 judges the second pre-charging is successful; and if no, the control unit 4 judges the second pre-charging is failed. In this way, a rapid voltage increase between terminals of the second capacitor C12 or the fourth capacitor C22 which causes a large current impact in the circuit may be avoided, thus preventing damages to the charging system in resulted from the large current impact.
With the steps of the second pre-charging, a failure self-test may also be performed for a third circuit between the first rectifying unit 21 and the first charging interface 22 and for a fourth circuit between the second rectifying unit 31 and the second charging interface 32. If the control unit 4 judges the second pre-charging is successful, it can be determined that elements or components in the third circuit and the fourth circuit run normally. If the control unit 4 judges the second pre-charging is failed, it can be determined that there is a failure in the third circuit or the fourth circuit, and thus the user may be reminded that the charging system needs to be repaired.
If the control unit 4 judges the second pre-charging is successful, the control unit 4 controls the second pre-charging switch K12 and the third pre-charging switch K13 to be switched off, and the second switch K2 and the third switch K3 to be switched on, and controls the first charging branch 2 and the second charging branch 3 to charge the battery 1. A first voltage from the grid is input to the first charging branch 2 via the first charging interface 22, the first filter unit 7 filters the first voltage to provide a filtered voltage, the first rectifying unit 21 rectifies the filtered voltage to provide a rectified voltage, and then the first transforming unit 5 reduces the rectified voltage to provide a reduced voltage to charge the battery 1. A second voltage from the grid is input to the second charging branch 3 via the second charging interface 32, the second filter unit 8 filters the second voltage to provide a filtered voltage, the second rectifying unit 31 rectifies the filtered voltage to provide a rectified voltage, and then the second transforming unit 6 reduces the rectified voltage to provide a reduced voltage to charge the battery 1.
With the charging system for the vehicle according to embodiments of the present disclosure, the first pre-charging and the second pre-charging are performed before the battery 1 is charged, which not only performs the failure self-test for the whole charging system, but also improves a stability of the charging system. In addition, the rapid voltage increase between terminals of the second capacitor C12 and terminals of the fourth capacitor C22 which may cause the large current impact in the circuit may be avoided, thus preventing the damages to the charging system resulted from the large current impact .
According to embodiments of the present disclosure, a vehicle comprising the charging system described above is also provided.
A method for controlling charging a vehicle with a charging system according to embodiments of the present disclosure will be described in details as below.
A method for controlling charging a vehicle with a charging system is also provided. The charging system comprises: a battery, a first charging branch comprising a first rectifying unit and a first charging interface, a second charging branch comprising a second rectifying unit and a second charging interface, a control unit, and a battery management unit. Referring to Fig. 3, the method comprises the following steps.
In step S301, the control unit sends a first signal to the battery management unit when the first charging interface is connected with a first charging connector and the second charging interface is connected with a second charging connector.
In step S302, the battery management unit detects the battery and judges whether the battery needs to be charged after receiving the first signal. If yes, step S303 is performed.
In step S303, the battery management unit sends a second signal to the control unit. In step S304, the control unit controls the first charging branch and the second charging branch to charge the battery after receiving the second signal.
According to an embodiment of the present disclosure, the method further comprises at least one of the following steps.
In step A, the battery management unit detects a voltage of the battery and judges whether the voltage is within a first predetermined voltage range. If yes, step S303 is performed.
In step B, the battery management unit detects a temperature of the battery and judges whether the temperature is within a predetermined temperature range. If yes, step S303 is performed.
In a preferred embodiment, the method further comprises the following step.
In step A, the battery management unit detects a voltage of the battery and judges whether the voltage is within a first predetermined voltage range. If yes, step B is performed.
In step B, the battery management unit detects a temperature of the battery and judges whether the temperature is within a predetermined temperature range. If yes, step S303 is performed.
In some embodiments, the battery management unit judges whether the temperature is within a predetermined temperature range. If the temperature is within the predetermined temperature range, the battery management unit detects a voltage of the battery and judges whether the voltage is within a first predetermined voltage range. If the voltage is within the first predetermined voltage range, step S303 is performed.
With the step A, an over-high voltage of the battery may be prevented, thus ensuring the operation safety of the charging system. With the step B, an over-high temperature of the battery may be prevented, and thus the operation safety of the charging system may be ensured.
In an embodiment, the charging system further comprises: a first transforming unit, a second transforming unit, a first switch having a first terminal connected with the battery and a second terminal connected with the first rectifying unit via the first transforming unit and connected with the second rectifying unit via the second transforming unit, a second switch connected between the first rectifying unit and the first charging interface, a third switch connected between the second rectifying unit and the second charging interface, and a first pre-charging resistor and a first pre-charging switch, in which a first terminal of the first pre-charging resistor is connected with a first terminal of the first pre-charging switch, and a second terminal of the first pre-charging resistor and a second terminal of the first pre-charging switch are connected with the first switch respectively.
In some embodiments, the step S304 comprises the following steps.
In step CI, the control unit controls the first pre-charging switch to be switched on and the first switch, the second switch, and the third switch to be switched off to perform a first pre-charging after receiving the second signal.
In step C2, the control unit judges whether a first difference between the first busbar voltage VI of the first charging branch and a first predetermined voltage is within a second predetermined voltage range and a pre-charging time is within a first predetermined time range, and whether a second difference between the second busbar voltage V2 of the second charging branch and a second predetermined voltage is within the second predetermined voltage range and the pre-charging time is within the first predetermined time range.
In step C3, if yes, the control unit controls the first pre-charging switch to be switched off, and the first switch, the second switch and the third switch to be switched on.
In step C4, the control unit controls the first charging branch and the second charging branch to charge the battery.
In an embodiment, the charging system further comprises: a second pre-charging resistor and a second pre-charging switch, in which a first terminal of the second pre-charging resistor is connected with a first terminal of the second pre-charging switch, and a second terminal of the second pre-charging resistor and a second terminal of the second pre-charging switch are connected with the second switch respectively; and a third pre-charging resistor and a third pre-charging switch, in which a first terminal of the third pre-charging resistor is connected with a first terminal of the third pre-charging switch, and a second terminal of the third pre-charging resistor and a second terminal of the third pre-charging switch are connected with the third switch respectively.
In some embodiments, the method further comprises the following steps.
In step Dl, the control unit controls the first pre-charging switch, the second switch, and the third switch to be switched off, and the first switch, the second pre-charging switch, and the third pre-charging switch to be switched on to perform a second pre-charging.
In step D2, the control unit judges whether the third busbar voltage V3 of the first charging branch is within a third predetermined voltase range and the fourth busbar voltage V4 of the second charging branch is within a fourth predetermined voltage range. If yes, the control unit controls the second pre-charging switch and the third pre-charging switch to be switched off and the second switch and the third switch to be switched on, and the step C4 is performed.
In some embodiments, the method further comprises the following steps.
In step E, the battery management unit judges whether the battery is fully charged. If yes, the battery management unit sends a third signal to the control unit.
In step F, the control unit controls the first charging branch and the second charging branch to stop charging the battery after receiving the third signal.
In some embodiments, the battery management unit detects an electric quantity, a current, or a voltage of the battery so as to determine or judge whether the battery is fully charged. Those skilled in the art will appreciate that, any other method which is capable of determining a charging state of the battery may be applied in the present disclosure, without particular limits.
According to a preferred embodiment of the present disclosure, as shown in Fig. 4, a flow chart of the method for controlling charging the vehicle with the charging system is provided. Referring to Fig. 4, the method comprises the following steps.
In step S401, the control unit sends a first signal to the battery management unit when the first charging interface is connected with a first charging connector and the second charging interface is connected with a second charging connector.
In step S402, the battery management unit judges whether the battery needs to be charged after receiving the first signal.
In step S403, if yes, the battery management unit sends a second signal to the control unit.
In step S404, the control unit controls the first pre-charging switch to be switched on and the first switch, the second switch, and the third switch to be switched off to perform a first pre-charging after receiving the second signal.
In step S405, the control unit judges whether a first difference between the first busbar voltage VI of the first charging branch and a first predetermined voltage is within a second predetermined voltage range and a pre-charging time is within a first predetermined time range, and whether a second difference between the second busbar voltage V2 of the second charging branch and a second predetermined voltage is within the second predetermined voltage range and the pre-charging time is within the first predetermined time range, i.e., judges whether the first pre-charging is successful. In step S406, if yes, the control unit controls the first pre-charging switch, the second switch, and the third switch to be switched off, and the first switch, the second pre-charging switch, and the third pre-charging switch to be switched on to perform a second pre-charging.
In step S407, the control unit judges whether the third busbar voltage V3 of the first charging branch is within a third predetermined voltage range and the fourth busbar voltage V4 of the second charging branch is within a fourth predetermined voltage range, i.e., judges whether the second pre-charging is successful.
In step S408, if yes, the control unit controls the second pre-charging switch and the third pre-charging switch to be switched off, and the second switch and the third switch to be switched on, and controls the first charging branch and the second charging branch to charge the battery.
With the method for controlling charging the vehicle with the charging system according to embodiments of the present disclosure, the first pre-charging and the second pre-charging are performed before the battery is charged, which not only performs the failure self-test for the whole charging system, but also improves a stability of the charging system. In addition, the rapid voltage increase between terminals of the second capacitor C12 and terminals of the fourth capacitor C22 which may cause the large current impact in the circuit may be avoided, thus preventing the damages to the charging system resulted from the large current impact.
Reference throughout this specification to "an embodiment," "some embodiments," "one embodiment", "another example," "an example," "a specific example," or "some examples," means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Thus, the appearances of the phrases such as "in some embodiments," "in one embodiment", "in an embodiment", "in another example," "in an example," "in a specific example," or "in some examples," in various places throughout this specification are not necessarily referring to the same embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.
Although explanatory embodiments have been shown and described, it would be appreciated by those skilled in the art that the above embodiments can not be construed to limit the present disclosure, and changes, alternatives, and modifications can be made in the embodiments without departing from spirit, principles and scope of the present disclosure.

Claims

WHAT IS CLAIMED IS:
1. A charging system for a vehicle, comprising:
a battery;
a first charging branch comprising a first rectifying unit and a first charging interface, wherein the battery is connected with the first charging interface via the first rectifying unit;
a second charging branch comprising a second rectifying unit and a second charging interface, wherein the battery is connected with the second charging interface via the second rectifying unit; and
a control unit connected with the first rectifying unit and the second rectifying unit respectively and configured to control the first charging branch and the second charging branch to charge the battery.
2. The charging system according to claim 1, further comprising:
a first switch having a first terminal connected with the battery and a second terminal connected with the first rectifying unit and the second rectifying unit respectively;
a second switch connected between the first rectifying unit and the first charging interface; and
a third switch connected between the second rectifying unit and the second charging interface.
3. The charging system according to claim 2, further comprising:
a first pre-charging resistor and a first pre-charging switch, wherein a first terminal of the first pre-charging resistor is connected with a first terminal of the first pre-charging switch, and a second terminal of the first pre-charging resistor and a second terminal of the first pre-charging switch are connected with the first switch respectively.
4. The charging system according to claim 2 or 3, further comprising:
a second pre-charging resistor and a second pre-charging switch, wherein a first terminal of the second pre-charging resistor is connected with a first terminal of the second pre-charging switch, and a second terminal of the second pre-charging resistor and a second terminal of the second pre-charging switch are connected with the second switch respectively; and
a third pre-charging resistor and a third pre-charging switch, wherein a first terminal of the third pre-charging resistor is connected with a first terminal of the third pre-charging switch, and a second terminal of the third pre-charging resistor and a second terminal of the third pre-charging switch are connected with the third switch respectively.
5. The charging system according to claim 1, wherein the first charging branch further comprises a first transforming unit connected between the battery and the first rectifying unit, and the second charging branch further comprises a second transforming unit connected between the battery and the second rectifying unit.
6. The charging system according to claim 1, further comprising:
a first fuse connected between the first rectifying unit and the first charging interface; and a second fuse connected between the second rectifying unit and the second charging interface.
7. The charging system according to claim 1, further comprising:
a first filter unit connected between the first rectifying unit and the first charging interface, and
a second filter unit connected between the second rectifying unit and the second charging interface.
8. The charging system according to claim 1, further comprising a battery management unit connected with the control unit and the battery respectively,
wherein the control unit is configured to send a first signal to the battery management unit when the first charging interface is connected with a first charging connector and the second charging interface is connected with a second charging connector,
the battery management unit is configured to judge whether the battery needs to be charged after receiving the first signal, and to send a second signal to the control unit when the battery needs to be charged, and
the control unit is further configured to control the first charging branch and the second charging branch to charge the battery after receiving the second signal.
9. A vehicle comprising a charging system, wherein the charging system comprises:
a battery;
a first charging branch comprising a first rectifying unit and a first charging interface, wherein the battery is connected with the first charging interface via the first rectifying unit;
a second charging branch comprising a second rectifying unit and a second charging interface, wherein the battery is connected with the second charging interface via the second rectifying unit; and a control unit connected with the first rectifying unit and the second rectifying unit respectively and configured to control the first charging branch and the second charging branch to charge the battery.
10. A method for controlling charging a vehicle with a charging system, wherein the charging system comprises: a battery, a first charging branch comprising a first rectifying unit and a first charging interface, a second charging branch comprising a second rectifying unit and a second charging interface, a control unit, and a battery management unit, and the method comprises:
sending a first signal to the battery management unit when the first charging interface is connected with a first charging connector and the second charging interface is connected with a second charging connector;
judging by the battery management unit whether the battery needs to be charged after receiving the first signal;
if yes, sending a second signal to the control unit by the battery management unit; and controlling the first charging branch and the second charging branch to charge the battery after receiving the second signal.
11. The method according to claim 10, wherein judging by the battery management unit whether the battery needs to be charged after receiving the first signal comprises:
judging whether an electric quantity of the battery is lower than a predetermined electric quantity;
if yes, judging that the battery needs to be charged.
12. The method according to claim 10, further comprising:
judging whether a voltage of the battery is within a first predetermined voltage range, if yes, judging that the battery needs to be charged; and/or
judging whether a temperature of the battery is within a predetermined temperature range, if yes, judging that the battery needs to be charged.
13. The method according to claim 10, wherein the charging system further comprises: a first transforming unit, a second transforming unit, a first switch having a first terminal connected with the battery and a second terminal connected with the first rectifying unit via the first transforming unit and connected with the second rectifying unit via the second transforming unit, a second switch connected between the first rectifying unit and the first charging interface, a third switch connected between the second rectifying unit and the second charging interface, and a first pre-charging resistor and a first pre-charging switch, in which a first terminal of the first pre-charging resistor is connected with a first terminal of the first pre-charging switch, and a second terminal of the first pre-charging resistor and a second terminal of the first pre-charging switch are connected with the first switch respectively, and controlling the first charging branch and the second charging branch to charge the battery after receiving the second signal comprises: controlling the first pre-charging switch to be switched on and the first switch, the second switch, and the third switch to be switched off to perform a first pre-charging after receiving the second signal;
judging whether a first difference between a first busbar voltage of the first charging branch and a first predetermined voltage is within a second predetermined voltage range and a pre-charging time is within a first predetermined time range, and whether a second difference between a second busbar voltage of the second charging branch and a second predetermined voltage is within the second predetermined voltage range and the pre-charging time is within the first predetermined time range;
if yes, controlling the first pre-charging switch to be switched off, and the first switch, the second switch, and the third switch to be switched on;
controlling the first charging branch and the second charging branch to charge the battery.
14. The method according to claim 13, wherein the charging system further comprises: a second pre-charging resistor and a second pre-charging switch, in which a first terminal of the second pre-charging resistor is connected with a first terminal of the second pre-charging switch, and a second terminal of the second pre-charging resistor and a second terminal of the second pre-charging switch are connected with the second switch respectively; and a third pre-charging resistor and a third pre-charging switch, in which a first terminal of the third pre-charging resistor is connected with a first terminal of the third pre-charging switch, and a second terminal of the third pre-charging resistor and a second terminal of the third pre-charging switch are connected with the third switch respectively, and the method further comprises:
controlling the first pre-charging switch, the second switch, and the third switch to be switched off, and the first switch, the second pre-charging switch, and the third pre-charging switch to be switched on to perform a second pre-charging; and
judging whether a third busbar voltage of the first charging branch is within a third predetermined voltage range and a fourth busbar voltage of the second charging branch is within a fourth predetermined voltage range, if yes, controlling the second pre-charging switch and the third pre-charging switch to be switched off and the second switch and the third switch to be switched on.
15. The method according to claim 10, further comprising:
judging whether the battery is fully charged, if yes, sending a third signal to the control unit by the battery management device; and
controlling the first charging branch and the second charging branch to stop charging the battery after receiving the third signal.
PCT/CN2013/078030 2012-06-27 2013-06-26 Charging system, vehicle comprising the same and method for controlling charging vehicle with the same WO2014000649A1 (en)

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US20150137754A1 (en) 2015-05-21

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