In-vehicle charging control device, vehicle charging system and vehicle

• US 9,484,755 B2
• Filed: 03/07/2014
• Issued: 11/01/2016
• Est. Priority Date: 09/22/2011
• Status: Active Grant

• Current Assignee: BYD Company Limited
• Original Assignee: BYD Company Limited, Shenzhen BYD Auto R&D Company Limited
• Inventors: Zhou, Lianwen, Liu, Yu
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): Piggush, Aaron
• Application Number:
  US14/200,516
• Publication Number:
  US 20140184157A1
• Time in Patent Office: 970 Days
• Field of Search: 320/104, 320/107, 320/109, 320/111, 320/163
• US Class Current: 1/1
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: B60L 53/16 Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/60 Monitoring or controlling charging stations
• CPC Class Codes: H01R 13/6616 with resistor
• CPC Class Codes: H02J 7/0036 using connection detecting circuits H02J7/0034 takes precedence
• 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 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

An in-vehicle charging control device may comprise a control module, a charging socket, and a switching circuit. The charging socket has a charging connection confirming terminal (CC) and a protective grounding terminal (PE). The switching circuit is connected with the charging connection confirming terminal (CC) and the protective grounding terminal (PE) of the charging socket. The control module is connected with an in-vehicle battery via the switching circuit. The charging socket matches with a charging plug. The switching circuit is in a conducting state when the charging plug is plugged in the charging socket and in a disconnection state when the charging plug is not plugged in the charging socket.

Claims

1. A charging control device, comprising:

a control module;

a charging socket having a charging connection confirming terminal and a protective grounding terminal; and

a switching circuit connected with the charging connection confirming terminal and the protective grounding terminal of the charging socket respectively,

wherein the control module is connected with a battery via the switching circuit, the charging connection confirming terminal and the protective grounding terminal of the charging socket are configured to match with a charging connection confirming terminal and a protective grounding terminal of a charging plug respectively, and the switching circuit is in a conducting state when the charging plug is plugged in the charging socket and in a disconnection state when the charging plug is not plugged in the charging socket,

wherein the switching circuit comprises;

a first MOS transistor having a source, a gate, and a drain; and

a first resistor,

wherein one end of the first resistor is connected with the battery and the source of the first MOS transistor, the other end of the first resistor and the gate of the first MOS transistor are connected with the charging connection confirming terminal of the charging socket, the drain of the first MOS transistor is connected with the control module, and the protective grounding terminal of the charging socket is grounded.

2. The charging control device of claim 1, wherein the switching circuit comprises:

a second MOS transistor having a source, a gate and a drain;

a third MOS transistor having a source, a gate and a drain; and

a bipolar transistor having a base, an emitter and a collector,

wherein the source of the second MOS transistor is connected with the battery, the gate of the second MOS transistor is connected with the charging connection confirming terminal of the charging socket, the emitter of the bipolar transistor is grounded, the source of the third MOS transistor is connected with the battery, the drain of the third MOS transistor is connected with the control module, and the protective grounding terminal of the charging socket is grounded.

3. The charging control device of claim 2, wherein the switching circuit further comprises:

a second resistor connected between the source and the gate of the second MOS transistor;

a third resistor, via which the base of the bipolar transistor is connected with the drain of the second MOS transistor;

a fourth resistor connected between the base and the emitter of the bipolar transistor;

a fifth resistor, via which the gate of the third MOS transistor is connected with the collector of the bipolar transistor; and

a sixth resistor connected between the source and the gate of the third MOS transistor.

4. The charging control device according to claim 1, further comprising at least one resistor connected between the charging connection confirming terminal and the protective grounding terminal of the charging plug.

5. A vehicle charging system, comprising:

a charging control device comprising;

a control module;

a charging socket having a charging connection confirming terminal and a protective grounding terminal; and

a switching circuit connected with the charging connection confirming terminal and the protective grounding terminal of the charging socket respectively,

wherein the control module is connected with a battery via the switching circuit, the charging connection confirming terminal and the protective grounding terminal of the charging socket;

a charging plug having a charging connection confirming terminal and a protective grounding terminal to match with the charging connection confirming terminal and the protective grounding terminal of the charging socket, wherein the switching circuit is in a conducting state when the charging plug is plugged in the charging socket and in a disconnection state when the charging plug is not plugged in the charging socket,

wherein the switching circuit comprises;

a first MOS transistor having a source, a gate and a drain; and

a first resistor,

wherein one end of the first resistor is connected with the battery and the source of the first MOS transistor, the other end of the first resistor and the gate of the first MOS transistor are connected with the charging connection confirming terminal of the charging socket, the drain of the first MOS transistor is connected with the control module, and the protective grounding terminal of the charging socket is grounded.

6. The charging control device of claim 5, wherein the switching circuit comprises:

a second MOS transistor having a source, a gate and a drain;

a third MOS transistor having a source, a gate and a drain; and

a bipolar transistor having a base, an emitter and a collector,

wherein the source of the second MOS transistor is connected with the battery, the gate of the second MOS transistor is connected with the charging connection confirming terminal of the charging socket, the emitter of the bipolar transistor is grounded, the source of the third MOS transistor is connected with the battery, the drain of the third MOS transistor is connected with the control module, and the protective grounding terminal of the charging socket is grounded.

7. The charging control device of claim 6, wherein the switching circuit further comprises:

a second resistor connected between the source and the gate of the second MOS transistor;

a third resistor, via which the base of the bipolar transistor is connected with the drain of the second MOS transistor;

a fourth resistor connected between the base and the emitter of the bipolar transistor;

a fifth resistor, via which the gate of the third MOS transistor is connected with the collector of the bipolar transistor; and

a sixth resistor connected between the source and the gate of the third MOS transistor.

8. The charging control device according to claim 5, further comprising at least one resistor connected between the charging connection confirming terminal and the protective grounding terminal of the charging plug.

9. A vehicle, comprising:

an in-vehicle battery;

an in-vehicle charging control device comprising;

a control module;

a charging socket; and

a switching circuit connected with the charging socket,

wherein the control module is connected with a battery via the switching circuit, and the switching circuit is in a conducting state when a charging plug is plugged in the charging socket and in a disconnection state when the charging plug is not plugged in the charging socket,

wherein the switching circuit comprises;

a first MOS transistor having a source, a gate and a drain; and

a first resistor,

wherein one end of the first resistor is connected with the battery and the source of the first MOS transistor, the other end of the first resistor and the gate of the first MOS transistor are connected with the charging socket, and the drain of the first MOS transistor is connected with the control module.

10. The charging control device of claim 9, wherein the switching circuit comprises:

a second MOS transistor having a source, a gate and a drain;

a third MOS transistor having a source, a gate and a drain; and

a bipolar transistor having a base, an emitter and a collector,

wherein the source of the second MOS transistor is connected with the battery, the gate of the second MOS transistor is connected with the charging connection confirming terminal of the charging socket, the emitter of the bipolar transistor is grounded, the source of the third MOS transistor is connected with the battery, the drain of the third MOS transistor is connected with the control module, and the protective grounding terminal of the charging socket is grounded.

11. The charging control device of claim 10, wherein the switching circuit further comprises:

a second resistor connected between the source and the gate of the second MOS transistor;

a third resistor, via which the base of the bipolar transistor is connected with the drain of the second MOS transistor;

a fourth resistor connected between the base and the emitter of the bipolar transistor;

a fifth resistor, via which the gate of the third MOS transistor is connected with the collector of the bipolar transistor; and

a sixth resistor connected between the source and the gate of the third MOS transistor.