Vehicle power supply with load shed interlock

Patent metadata

Field	Value
Publication number	US-10843646-B2
Application number	US-201816032530-A
Country	US
Kind code	B2
Filing date	Jul 11, 2018
Priority date	Jul 11, 2018
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

A vehicle power management system includes a primary power bus for powering a first non-critical load, a secondary power bus for powering a second non-critical load, and a first relay electrically connected between the primary power bus and the first non-critical load. The vehicle power management system further includes a second relay electrically connected between the secondary power bus and the second non-critical load. The first inductor is electrically connected to the secondary power bus and the second inductor is electrically connected to the primary power bus.

First claim

What is claimed is:

1. A vehicle power management system comprising:
a primary power bus for powering a first non-critical load;
a secondary power bus for powering a second non-critical load;
a first relay including a first switch and a first inductor, the first switch electrically connected between the primary power bus and the first non-critical load, the first inductor arranged to activate the first switch; and
a second relay including a second switch and a second inductor, the second switch electrically connected between the secondary power bus and the second non-critical load, the second inductor arranged to activate the second switch,
wherein the first inductor is electrically connected in series with the secondary power bus and the second inductor is electrically connected in series with the primary power bus.

2. The vehicle power management system of claim 1 , further comprising a first voltage converter electrically connected to the primary power bus.

3. The vehicle power management system of claim 2 , further comprising a second voltage converter electrically connected to the secondary power bus.

4. The vehicle power management system of claim 1 , further comprising a first power storage electrically connected to the primary power bus.

5. The vehicle power management system of claim 4 , further comprising a second power storage electrically connected to the secondary power bus.

6. The vehicle power management system of claim 1 , further comprising a processor, and wherein the processor is programmed to control a state of the first switch and a state of the second switch.

7. The vehicle power management system of claim 6 , wherein the processor is programmed to control the state of the first switch by outputting a signal to a first transistor electrically connected in series with the first inductor to control current flow through the first inductor.

8. The vehicle power management system of claim 7 , wherein the processor is programmed to control the state of the second switch by outputting a signal to a second transistor electrically connected in series with the second inductor to control current flow through the second inductor.

9. The vehicle power management system of claim 6 , wherein the processor is programmed to:
detect a vehicle startup; and
open the first relay and the second relay as a result of detecting the vehicle startup.

10. The vehicle power management system of claim 9 , wherein opening the first relay includes outputting a signal to a first transistor in series with the first inductor to open the first switch.

11. The vehicle power management system of claim 10 , wherein opening the second relay includes outputting a signal to a second transistor in series with the second inductor to open the second switch.

12. The vehicle power management system of claim 11 , wherein the processor is programmed to detect that at least one of a high voltage power source, a first voltage converter, a second voltage converter, a first power storage, and a second power storage is working properly.

13. The vehicle power management system of claim 12 , wherein the processor is programmed to detect that at least one of the high voltage power source, the first voltage converter, the second voltage converter, the first power storage, and the second power storage is working properly based at least in part on a signal output by a battery controller.

14. The vehicle power management system of claim 12 , wherein the processor is programmed to close the first relay and the second relay as a result of detecting that the high voltage power source, the first voltage converter, the second voltage converter, the first power storage, and the second power storage are working properly.

15. A vehicle power management system comprising:
a primary power bus for powering a first non-critical load;
a secondary power bus for powering a second non-critical load;
a first voltage converter electrically connected to the primary power bus;
a second voltage converter electrically connected to the secondary power bus;
a first power storage electrically connected to the primary power bus;
a second power storage electrically connected to the secondary power bus;
a first relay including a first switch and a first inductor, the first switch electrically connected between the primary power bus and the first non-critical load, the first inductor arranged to activate the first switch;
a second relay including a second switch and a second inductor, the second switch electrically connected between the secondary power bus and the second non-critical load, the second inductor arranged to activate the second switch; and
a processor programmed to control a state of the first switch and a state of the second switch,
wherein the first inductor is electrically connected in series with the secondary power bus and the second inductor is electrically connected in series with the primary power bus.

16. The vehicle power management system of claim 15 , wherein the processor is programmed to control the state of the first switch by outputting a signal to a first transistor electrically connected in series with the first inductor to prevent current flow through the first inductor.

17. The vehicle power management system of claim 16 , wherein the processor is programmed to control the state of the second switch by outputting a signal to a second transistor electrically connected in series with the second inductor to prevent current flow through the second inductor.

18. The vehicle power management system of claim 15 , wherein the processor is programmed to:
detect a vehicle startup; and
open the first relay and the second relay as a result of detecting the vehicle startup.

19. The vehicle power management system of claim 18 , wherein opening the first relay includes outputting a signal to a first transistor in series with the first inductor to open the first switch and wherein opening the second relay includes outputting a signal to a second transistor in series with the second inductor to open the second switch.

20. The vehicle power management system of claim 19 , wherein the processor is programmed to:
detect that at least one of a high voltage power source, a first voltage converter, a second voltage converter, a first power storage, and a second power storage is working properly based at least in part on a signal output by a battery controller; and
close the first relay and the second relay as a result of detecting that the high voltage power source, the first voltage converter, the second voltage converter, the first power storage, and the second power storage are working properly.

Assignees

• Ford Global Tech Llc

Inventors

• Boesch Mathew Alan
• Dagher Sami
• Celinske David

Classifications

• B60R16/0232

  for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions · CPC title

• Y02T10/92

  Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles · CPC title

• B60R16/03

  for supply of electrical power to vehicle subsystems {or for (circuit arrangements for charging batteries H02J7/00)} · CPC title

• B60R16/033 Primary

  characterised by the use of electrical cells or batteries (for propulsion puposes B60K1/04; supplying batteries to, or removing batteries from, vehicles B60S5/06; testing of charge state G01R31/36) · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title