CHARGING SYSTEM, VEHICLE COMPRISING THE SAME AND METHOD FOR CONTROLLING CHARGING VEHICLE WITH THE SAME

• US 20150137754A1
• Filed: 06/26/2013
• Published: 05/21/2015
• Est. Priority Date: 06/27/2012
• Status: Active Grant

• Current Assignee: BYD Company Limited
• Original Assignee: BYD Company Limited
• Inventors: Yang, Guangming, Tang, Zheqing, Liu, Jian, Zhang, Xiaohui
• Granted Patent: US 10,086,716 B2
• Time in Patent Office: Days
• US Class Current: 320/109
• 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 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, 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.

16. The vehicle according to claim 9, 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.

17. The vehicle according to claim 16, 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.

18. The vehicle according to claim 17, 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.

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;

when the battery needs to be charged after receiving the first signal, 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; and

when the electric quantity of the battery is lower than the predetermined electric quantity, judging that the battery needs to be charged.

12. The method according to claim 10, further comprising at least one of the following judgment conditions:

judging whether a voltage of the battery is within a first predetermined voltage range, when the voltage of the battery is within the first predetermined voltage range, judging that the battery needs to be charged; and

judging whether a temperature of the battery is within a predetermined temperature range, when the temperature of the battery is within the predetermined temperature range, 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;

when 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 when 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, 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; and

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;

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; and

when the third busbar voltage of the first charging branch is within the third redetermined voltage range and the fourth busbar voltage of the second charging branch is within the fourth predetermined voltage range, 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;

when the battery is fully charged, 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.