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

• US 10,086,716 B2
• Filed: 06/26/2013
• Issued: 10/02/2018
• Est. Priority Date: 06/27/2012
• Status: Active Grant

• Current Assignee: BYD Company Limited
• Original Assignee: BYD Company Limited
• Inventors: Yang, Guangming, Zhang, Xiaohui, Tang, Zheqing, Liu, Jian
• Primary Examiner(s): Muralidar, Richard V
• Application Number:
  US14/411,360
• Publication Number:
  US 20150137754A1
• Time in Patent Office: 1,924 Days
• Field of Search: 320109
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 2270/20 Inrush current reduction, i.e. avoiding high currents when connecting the battery
• CPC Class Codes: B60L 3/003 relating to inverters
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 53/67 Controlling two or more charging stations
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/167 : 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]
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

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; 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.

Claims

1. A charging system for a vehicle, comprising:

a battery;

a first charging branch comprising a first rectifying unit, a first transforming unit and a first charging interface, wherein the battery is connected with the first charging interface via the first rectifying unit, the first transforming unit is connected between the battery and the first rectifying unit, the first transforming unit comprises a first capacitor, a second capacitor, a first inductor, a first switching transistor, and a second switching transistor, and the first charging interface is connected with a first charging connector;

a second charging branch comprising a second rectifying unit, a second transforming unit and a second charging interface, wherein the battery is connected with the second charging interface via the second rectifying unit, the second transforming unit is connected between the battery and the second rectifying unit, the second transforming unit comprises a third capacitor, a fourth capacitor, a second inductor, a third switching transistor, and a fourth switching transistor, and the second charging interface is connected with a second charging connector; 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 through the first charging connector and the second charging connector together, so as to increase a charging power.

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 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, 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.

6. 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.

7. 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 the first charging connector and the second charging interface is connected with the 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.

8. The charging system according to claim 7, wherein the battery management unit is configured to send the second signal to the control unit when the first charging interface is connected with the first charging connector and the second charging interface is connected with the second charging connector.

9. The charging system according to claim 1, wherein the first charging connector and the second charging connector are connected with two charging piles respectively.

10. A vehicle comprising a charging system, wherein the charging system comprises:

a battery;

a first charging branch comprising a first rectifying unit, a first transforming unit and a first charging interface, wherein the battery is connected with the first charging interface via the first rectifying unit, the first transforming unit is connected between the battery and the first rectifying unit, the first transforming unit comprises a first capacitor, a second capacitor, a first inductor, a first switching transistor, and a second switching transistor, and the first charging interface is connected with a first charging connector;

a second charging branch comprising a second rectifying unit, a second transforming unit and a second charging interface, wherein the battery is connected with the second charging interface via the second rectifying unit, the second transforming unit is connected between the battery and the second rectifying unit, the second transforming unit comprises a third capacitor, a fourth capacitor, a second inductor, a third switching transistor, and a fourth switching transistor, and the second charging interface is connected with a second charging connector; 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 through the first charging connector and the second charging connector together, so as to increase a charging power.

11. The vehicle according to claim 10, the charging system 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.

12. The vehicle according to claim 11, the charging system 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.

13. The vehicle according to claim 12, the charging system 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.

14. The vehicle according to claim 10, the charging system 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 the first charging connector and the second charging interface is connected with the 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.

15. The vehicle according to claim 14, wherein the battery management unit is configured to send the second signal to the control unit when the first charging interface is connected with the first charging connector and the second charging interface is connected with the second charging connector.

16. The vehicle according to claim 10, wherein the first charging connector and the second charging connector are connected with two charging piles respectively.