ELECTRIC VEHICLE, ELECTRIC-VEHICLE CHARGING STAND AND COMMUNICATION SYSTEM THEREBETWEEN

• US 20120200258A1
• Filed: 09/22/2011
• Published: 08/09/2012
• Est. Priority Date: 02/08/2011
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: LEE, CHUNG WOO
• Granted Patent: US 8,994,328 B2
• Time in Patent Office: Days
• US Class Current: 320/109
• CPC Class Codes: B60L 53/31 Charging columns specially adapted for electric vehicles
• CPC Class Codes: B60L 53/62 in response to charging parameters, e.g. current, voltage or electrical charge
• CPC Class Codes: B60L 53/66 Data transfer between charging stations and vehicles
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries
• 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

Disclosed are an electric vehicle (EV), an EV charging stand, and a communication system therebetween, the EV including a charge control unit configured to detect a preparation state for charging a battery and output a resistance varying signal according to the detected state, and a resistor unit configured to vary a resistance value in response to the resistance varying signal, thus changing a voltage value of a state signal transmitted to the EV charging stand, and the EV charging stand including a comparator configured to receive a stage signal from the EV, compare a voltage value of the received state signal with a reference value, and output a signal in response to a result of comparing, and a control unit configured to receive the signal from the comparator and detect a preparation state for charging the battery of the EV.

Claims

1. An electric vehicle (EV), comprising:

a charge control unit configured to detect a preparation state for charging a battery of the EV with electricity, and to output a resistance varying signal according to the detected preparation state, and

a resistor unit configured to vary a resistance value in response to the resistance varying signal outputted from the charge control unit, thus changing a voltage value of a state signal transmitted to an EV charging stand connected to the EV when the battery is charged.

2. The electric vehicle as set forth in claim 1, wherein the charge control unit receives a pulse signal from the EV charging stand to be synchronized with a control unit of the EV charging stand.

3. An electric vehicle (EV) charging stand, comprising:

a comparator configured to receive a stage signal from an electric vehicle (EV), to compare a voltage value of the received state signal with a reference value, and to output a signal in response to a result of comparing; and

a control unit configured to receive the signal from the comparator, and to detect a preparation state for charging a battery of the EV.

4. The EV charging stand as set forth in claim 3, wherein the comparator is configured to compare the voltage value of the state signal received from the EV with the reference value, and to output a ‘

Low’

signal when the voltage value of the state signal is lower than the reference value and output a ‘

High’

signal when the voltage value of the state signal is higher than the reference value.

5. The EV charging stand as set forth in claim 3, further comprising:

a photo-coupler configured to electrically insulate the comparator from the control unit, and to transmit the signal ouputted from the comparator to the control unit.

6. The EV charging stand as set forth in claim 5, wherein the control unit is configured to detect a preparation state for charging the battery of the EV, in response to the signal received from the photo-coupler.

7. The EV charging stand as set forth in claim 3, wherein the control unit is configured to detect the preparation state for charging the battery of the EV in response to the received signal, and to control an operation of an electric power unit supplying a current for charging the battery to the EV connected to the EV charging stand, based on the detected preparation state.

8. The EV charging stand as set forth in claim 3, wherein the control unit is configured to detect the preparation state for charging the battery of the EV in response to the received signal, and to control a display unit provided in the EV charging stand so that the detected preparation state is displayed in the display unit.