Electrical energy system for a motor vehicle

Patent metadata

Field	Value
Publication number	US-10814808-B2
Application number	US-201916582369-A
Country	US
Kind code	B2
Filing date	Sep 25, 2019
Priority date	Nov 7, 2018
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

The disclosure relates to an electrical energy system for a motor vehicle and a method for operating an electrical energy system for a motor vehicle.

First claim

The invention claimed is:

1. An energy system for a vehicle, comprising: at least one high-voltage energy storage device arranged in a housing, wherein at least one unit which electrically connects the at least one high-voltage energy storage device with loads attached to the energy system is arranged in the housing, and wherein the unit comprises switching devices which are designed to interrupt the circuit between the at least one high-voltage energy storage device and the loads, wherein at least one load which is not active during driving operations of the vehicle is connected to the at least one high-voltage energy storage device via a separate intermediate circuit in the unit containing at least one additional switching device, wherein the at least one additional switching device is designed to keep the separate intermediate circuit interrupted constantly during driving operations.

2. The energy system according to claim 1 , wherein the at least one load, which is not active during a driving operation of the vehicle, is a charging device.

3. The energy system according to claim 2 , wherein the separate intermediate circuit in the unit comprises a pre-charging circuit, which is designed to bridge the additional switching device before the additional switching device is closed.

4. The energy system according to claim 2 , wherein the separate intermediate circuit in the unit comprises a discharging device, which is designed to discharge the separate intermediate circuit after the additional switching device is opened.

5. The energy system according to claim 2 , wherein the switching devices comprise contactors.

6. The energy system according to claim 2 , wherein the at least one additional switching device comprises at least one contactor.

7. The energy system according to claim 1 , wherein the separate intermediate circuit in the unit comprises a pre-charging circuit, which is designed to bridge the additional switching device before the additional switching device is closed.

8. The energy system according to claim 7 , wherein the separate intermediate circuit in the unit comprises a discharging device, which is designed to discharge the separate intermediate circuit after the additional switching device is opened.

9. The energy system according to claim 7 , wherein the switching devices comprise contactors.

10. The energy system according to claim 7 , wherein the at least one additional switching device comprises at least one contactor.

11. The energy system according to claim 1 , wherein the separate intermediate circuit in the unit comprises a discharging device, which is designed to discharge the separate intermediate circuit after the additional switching device is opened.

12. The energy system according to claim 11 , wherein the switching devices comprise contactors.

13. The energy system according to claim 11 , wherein the at least one additional switching device comprises at least one contactor.

14. The energy system according to claim 1 , wherein the switching devices comprise contactors.

15. The energy system according to claim 14 , wherein the at least one additional switching device comprises at least one contactor.

16. The energy system according to claim 1 , wherein the at least one additional switching device comprises at least one contactor.

17. The energy system according to claim 16 , wherein the at least one contactor only has normally open contacts.

18. A method for operating an energy system according to claim 1 , in which the electrical connection between the at least one high-voltage energy storage device and such loads connected to the energy system which are not required during a driving operation of the vehicle are kept interrupted constantly during the driving operation.

19. The method according to claim 18 , in which the loads which are not required during a driving operation of the vehicle comprise a charging device.

20. The method according to claim 19 , in which the electrical connection of the charging device with the at least one high-voltage energy storage device is interrupted during driving operations of the vehicle by keeping open the normally open contacts of a contactor.

Assignees

• Audi Ag

Inventors

• Hackner Stefan

Classifications

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title

• H02J7/663

  using battery or load disconnect circuits (H02J9/002 takes precedence) · CPC title

• H02J7/62

  against overcurrent · CPC title

• B60L3/0007 Primary

  Measures or means for preventing or attenuating collisions · 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