Method and system for detecting fusion of relay

Patent metadata

Field	Value
Publication number	US-10471839-B2
Application number	US-201615228121-A
Country	US
Kind code	B2
Filing date	Aug 4, 2016
Priority date	Oct 16, 2015
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

A method and system for detecting fusion of a relay are provided to more accurately diagnose fusion of a relay by adjusting relay OFF order when a vehicle engine is turned off using data regarding whether fusion of a relay was detected when the vehicle engine was turned on. The method includes detecting whether first and second relays have been fused when a vehicle engine was turned on and adjusting OFF order of the first and second relays when the vehicle engine is turned off based on whether the first and second relays have been fused.

First claim

What is claimed is:

1. A method for determining fusion of a relay, comprising:
determining, by a controller, whether at least one or more relays of first and second relays have been fused when a vehicle engine was turned on; and
adjusting, by the controller, an OFF order of the first and second relays when the vehicle engine is turned off based on the determination of whether the first and second relays have been fused when the vehicle engine was turned on.

2. The method according to claim 1 , further comprising:
in response to determining that the first and second relays have not been fused when the vehicle engine was turned on, simultaneously turning off, by the controller, both the first and second relays when the vehicle engine is turned off.

3. The method according to claim 1 , further comprising:
in response to determining that at least one or more relays of the first and second relays have been fused when the vehicle engine was turned on, determining, by the controller, whether the second relay has been fused when the vehicle engine was turned on.

4. The method according to claim 3 , further comprising:
when the controller determines that the second relay has been fused when the vehicle engine was turned on, turning off, by the controller, the first relay.

5. The method according to claim 4 , further comprising:
determining, by the controller, whether the first relay has been fused when the vehicle engine was turned off, after the turning off of the first relay; and
when the controller determines that the first relay has been fused, determining, by the controller, that both the first relay and the second relay have been fused and outputting a warning to a driver when the vehicle engine was turned off.

6. The method according to claim 5 , further comprising:
when the controller determines that the first relay has not been fused in the determination of whether the first relay has been fused when the vehicle engine was turned off, determining, by the controller, that the second relay has been fused, when the vehicle engine was turned off.

7. The method according to claim 3 , further comprising:
when the controller determines that the second relay has not been fused in the determination of whether the second relay has been fused when the vehicle engine was turned on, turning off, by the controller, the second relay.

8. The method according to claim 7 , further comprising:
determining, by the controller, whether the second relay has been fused when the vehicle engine was turned off, after the turning off of the second relay; and
when the second relay has been fused, diagnosing, by the controller, that both the first relay and the second relay have been fused and outputting a warning to a driver.

9. The method according to claim 8 , further comprising:
when the controller determines that the second relay has not been fused when the vehicle engine was turned off in the determination of whether the second relay has been fused when the vehicle engine was turned off, determining, by the controller, that the first relay has been fused.

10. A battery control system, comprising:
a high voltage battery configured to transmit power to a driving motor;
a motor controller including an inverter configured to drive the driving power; and
a power relay assembly configured to execute switching to selectively supply battery power to a vehicle,
wherein a controller is configured to determine whether at least one or more of a first relay and a second relay of the power relay assembly have been fused when a vehicle engine was turned on and adjust an OFF order of the first and second relays when the vehicle engine is turned off based on the determination of whether the first and the second relays have been fused when the vehicle engine was turned on.

11. The battery control system of claim 10 , wherein in response to determining that the first and second relays have not been fused when the vehicle engine was turned on, the controller is configured to simultaneously turn off both the first and second relays when the vehicle engine is turned off.

12. The battery control system of claim 10 , wherein in response to determining that at least one or more of the first and second relays have been fused when the vehicle engine was turned on, the controller is configured to determine whether the second relay has been fused when the vehicle engine was turned on.

13. The battery control system of claim 12 , wherein when the controller determines that the second relay has been fused when the vehicle engine was turned on, the controller is configured to turn off the first relay.

14. The battery control system of claim 13 , wherein the controller is further configured to determine, whether the first relay has been fused when the vehicle engine was turned off, after the turning off of the first relay and when the controller determines that the first relay has been fused, determine that both the first relay and the second relay have been fused and output a warning to a driver when the vehicle engine was turned off.

15. The battery control system of claim 14 , wherein when the controller determines that the first relay has not been fused in the determination of whether the first relay has been fused when the vehicle engine was turned off, the controller is configured to determine that the second relay has been fused when the vehicle engine was turned off.

16. The battery control system of claim 12 , wherein when the controller determines that the second relay has not been fused in the determination of whether the second relay has been fused when the vehicle engine was turned on the controller is configured to turn off the second relay.

17. The battery control system of claim 16 , wherein the controller is further configured to determine whether the second relay has been fused when the vehicle engine was turned off, after the turning off of the second relay and when the controller determines that the second relay has been fused when the vehicle engine was turned off, determine that both the first relay and the second relay have been fused and outputting a warning to a driver when the vehicle engine was turned off.

18. The battery control system of claim 17 , wherein when controller determines that the second relay has not been fused when the vehicle engine was turned off in the determination of whether the second relay has been fused when the vehicle engine was turned off, the controller is configured to determine that the first relay has been fused.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Kim Kyung Ho
• Min Kyung In
• Choi Jae Hoon
• Kim Dong Gun
• Lim Do Kyoung
• Kim Jin Wook
• Bang Jun Ho
• Lee Yoon Jun
• Yang Hee Tae
• Kim Yu Seok
• Moon Hyo Sik
• Ahn Kyun Young
• Kim Suk Hyung
• Kim Dong Il

Classifications

• H02J7/685

  using connection detecting circuits (H02J7/68 takes precedence) · CPC title

• H02J7/80 Primary

  including monitoring or indicating arrangements · CPC title

• B60L3/04 Primary

  Cutting off the power supply under fault conditions (protective devices and circuit arrangements in general H01H; H02H) · CPC title

• B60W20/50

  Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode · CPC title

• G01R31/007

  using microprocessors or computers · CPC title