HIGH VOLTAGE SHUT DOWN SYSTEM AND METHOD FOR ELECTRIC VEHICLE

• US 20150360569A1
• Filed: 05/13/2015
• Published: 12/17/2015
• Est. Priority Date: 06/17/2014
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Kim, Do Hoon, Kim, Zeung Il
• Granted Patent: US 9,783,059 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 3/0007 Measures or means for preventing or attenuating collisions
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 53/00 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
• CPC Class Codes: B60R 2021/01286 Electronic control units
• CPC Class Codes: B60R 21/0136 responsive to actual contact with an obstacle , e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle monitoring crash strength in combination with passenger seat detection B60R21/01558
• 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 90/14 Plug-in electric vehicles

Abstract

A high voltage shut down system and method for an electric vehicle are provided, which perform a high voltage shut down function in connection with a collision detection signal (airbag expansion signal) generated from an airbag controller even when a vehicle is being charged. The high voltage shut down system a third power supply controller which is in an operable state for transmitting power when the vehicle starts and is charged. An airbag control unit is operated by receiving power through the third power supply controller, and is configured to generate an airbag expansion signal when detecting an occurrence of a collision of the vehicle. A high voltage controller is configured to perform a high voltage shut down function in response to receiving the airbag expansion signal.

Claims

1. A system for shutting down a high voltage for an electric vehicle, comprising:

a memory configured to store program instructions; and

a controller configured to execute the program instructions, the program instructions when executed configured to;

operate a collision detection unit configured to detect a collision occurring while charging a vehicle; and

operate a high voltage controller configured to perform a high voltage shut down function when a collision is detected by the collision detection unit.

2. The system of claim 1, wherein the program instructions when executed are further configured to:

operate a third power supply controller configured to transmit operative power to the collision detection unit when the vehicle is charged.

3. The system of claim 2, wherein the third power supply controller is connected with a battery charger, and configured to receive power from the battery charger when the vehicle is charged and in an operable state.

4. The system of claim 1, wherein the collision detection unit includes an airbag control unit configured to generate an airbag expansion signal when detecting a collision of the vehicle.

5. The system of claim 1, wherein the program instructions when executed are further configured to:

operate a first power supply controller which becomes operable for transmitting power when the vehicle starts;

operate an airbag configured to receive power via the first power supply controller; and

operate an event data recorder (EDR) configured to receive power via the first power supply controller.

6. The system of claim 2, wherein the third power supply controller is configured to receive power through a third power supply relay which is configured to be activated by a battery charger to be operated when the vehicle is charged.

7. The system of claim 2, wherein the third power supply controller is configured to receive power through the third power supply relay when the vehicle starts, and the third power supply relay is configured to be activated and operated by a first power supply relay which is activated and operated when the vehicle starts.

8. The system of claim 7, wherein the first power supply relay is activated when the vehicle starts to activate the third power supply relay and supply power to a first power supply controller.

9. The system of claim 5, wherein the airbag is connected to a first power supply controller when the vehicle starts, and is selectively connected to a third power supply controller while the vehicle is being charged.

10. The system of claim 5, wherein the EDR is connected to a first power supply controller when the vehicle starts, and is selectively connected to a third power supply controller while the vehicle is being charged.

11. The system of claim 1, further comprising:

a rear collision detection unit configured to detect a rear collision of the vehicle occurring while the vehicle is being charged,

wherein when the rear collision detection unit detects a rear collision, the high voltage controller performs a high voltage shut down function.

12. The system of claim 11, wherein the rear collision detection unit receives operative power by a third power supply controller to be operable when the vehicle is charged.

13. A method of shutting down a high voltage for an electric vehicle, comprising:

operating, by a controller, a third power supply controller through a battery charger when a vehicle is charged;

operating, by the controller, the third power supply controller to supplying power to an airbag controller; and

operating, by the controller, a high voltage controller, to perform a high voltage shut down function in connection with an airbag expansion signal generated when the airbag controller detects a collision of the vehicle.

14. The method of claim 13, wherein an airbag and an event data recorder (EDR) are not connected to the third power supply controller and are not operated when the airbag expansion signal is generated.

15. The method of claim 13, wherein an airbag and an EDR are connected to the third power supply controller, the method further comprises:

operating, by the controller, the third power supply controller in response to the airbag expansion signal.

16. The method of claim 13, wherein a first power supply controller is operable together with the third power supply controller when the vehicle starts, the method further comprising:

performing, by the controller, a high voltage shut down function; and

operating, by the controller, an airbag and an EDR using power received through the first power supply controller when the airbag expansion signal is generated.

17. A non-transitory computer readable medium containing program instructions executed by a processor for shutting down a high voltage for an electric vehicle, the computer readable medium comprising:

program instructions that operate collision detection unit configured to detect a collision occurring while charging a vehicle; and

program instructions that operate a high voltage controller configured to perform a high voltage shut down function when a collision is detected by the collision detection unit.

program instructions that operate a third power supply controller through a battery charger when a vehicle is charged;

program instructions that operate the third power supply controller to supplying power to an airbag controller; and

program instructions that operate a high voltage controller, to perform a high voltage shut down function in connection with an airbag expansion signal generated when the airbag controller detects a collision of the vehicle.

18. The non-transitory computer readable medium according to claim 17, wherein an airbag and an EDR are not connected to the third power supply controller and are not operated when the airbag expansion signal is generated.

19. The non-transitory computer readable medium according to claim 17, wherein an airbag and an EDR are connected to the third power supply controller, the computer readable medium further comprising:

program instructions that operate the third power supply controller in response to the airbag expansion signal.

20. The non-transitory computer readable medium according to claim 17, wherein a first power supply controller is operable together with the third power supply controller when the vehicle starts, the computer readable medium further comprising:

program instructions that perform a high voltage shut down function; and

operate an airbag and an EDR using power received through the first power supply controller when the airbag expansion signal is generated.