Extinguishing system for a high-voltage battery of a motor vehicle and motor vehicle with an extinguishing system for a high-voltage battery

Patent metadata

Field	Value
Publication number	US-11083918-B2
Application number	US-201916502578-A
Country	US
Kind code	B2
Filing date	Jul 3, 2019
Priority date	Jul 12, 2018
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

An extinguishing system for a high-voltage battery of a motor vehicle, including at least one extinguishing agent container with a gaseous extinguishing agent; a seal for sealing the extinguishing agent container, which prevents an outflow of the extinguishing agent into the interior of the high-voltage battery; a control device interacting with the seal device, designed to open the seal upon the incidence of a triggering signal, thus allowing the extinguishing agent to flow into the interior of the high-voltage battery and to displace any air included therein; an auto-ignition mechanism that interacts with the seal, which auto-ignites at a certain auto-ignition temperature and opens the seal.

First claim

The invention claimed is:

1. An extinguishing system for a high-voltage battery of a motor vehicle, comprising:
at least one extinguishing agent container with a gaseous extinguishing agent;
a seal for sealing the extinguishing agent container, which prevents an outflow of the extinguishing agent into the interior of the high-voltage battery, the seal being openable upon the incidence of a triggering signal, thus allowing the extinguishing agent to flow into the interior of the high-voltage battery and to displace any air comprised therein; and
an auto-ignition mechanism that interacts with the seal, which auto-ignites at a certain auto-ignition temperature and opens the seal;
wherein an alarm signal is emitted in the motor vehicle as soon as the seal is opened;
wherein information is dispensed about the degree in which the condition of the high-voltage battery is critical; and
wherein a prompt is given, based on the information, regarding a driving capability of the vehicle.

2. The extinguishing system according to claim 1 , wherein the auto-ignition mechanism features a fuse which auto-ignites as of the auto-ignition temperature and opens the seal.

3. The extinguishing system according to claim 2 , further comprising a signaling connection with a crash sensor for providing the triggering signal.

4. The extinguishing system according to claim 2 , further comprising a signaling connection with a temperature sensing system of the extinguishing system, which is designed to measure a temperature of the high-voltage battery and to provide the triggering signal when the measured temperature is higher than a predetermined temperature.

5. The extinguishing system according to claim 2 , wherein the auto-ignition temperature is not greater than the temperature above which a thermal runaway of the high-voltage battery occurs.

6. The extinguishing system according to claim 2 , wherein the extinguishing system features a duct system connected with the extinguishing agent container, intermediated by the seal, with discharge openings through which the extinguishing agent may flow into the interior of the high-voltage battery.

7. The extinguishing system according to claim 1 , further comprising a signaling connection with a crash sensor for providing the triggering signal.

8. The extinguishing system according to claim 7 , further comprising a signaling connection with a temperature sensing system of the extinguishing system, which is designed to measure a temperature of the high-voltage battery and to provide the triggering signal when the measured temperature is higher than a predetermined temperature.

9. The extinguishing system according to claim 7 , wherein the auto-ignition temperature is not greater than the temperature above which a thermal runaway of the high-voltage battery occurs.

10. The extinguishing system according to claim 1 , further comprising a signaling connection with a temperature sensing system of the extinguishing system, which is designed to measure a temperature of the high-voltage battery and to provide the triggering signal when the measured temperature is higher than a predetermined temperature.

11. The extinguishing system according to claim 10 , wherein the temperature sensing system features temperature sensors, integrated into every battery cell of the high-voltage battery, for measuring the respective cell temperatures of every battery cell of the high-voltage battery.

12. The extinguishing system according to claim 11 , wherein the predetermined temperature is below the temperature above which a thermal runaway of the high-voltage battery occurs, and in that the auto-ignition temperature is above the predetermined temperature.

13. The extinguishing system according to claim 11 , wherein the auto-ignition temperature is not greater than the temperature above which a thermal runaway of the high-voltage battery occurs.

14. The extinguishing system according to claim 10 , wherein the predetermined temperature is below the temperature above which a thermal runaway of the high-voltage battery occurs, and in that the auto-ignition temperature is above the predetermined temperature.

15. The extinguishing system according to claim 14 , wherein the auto-ignition temperature is not greater than the temperature above which a thermal runaway of the high-voltage battery occurs.

16. The extinguishing system according to claim 10 , wherein the auto-ignition temperature is not greater than the temperature above which a thermal runaway of the high-voltage battery occurs.

17. The extinguishing system according to claim 1 , wherein the auto-ignition temperature is not greater than the temperature above which a thermal runaway of the high-voltage battery occurs.

18. The extinguishing system according to claim 1 , wherein the extinguishing system features a duct system connected with the extinguishing agent container, intermediated by the seal, with discharge openings through which the extinguishing agent may flow into the interior of the high-voltage battery.

19. The extinguishing system according to claim 1 , wherein the extinguishing system further comprises at least one pressure relief valve integrated into a housing of the high-voltage battery, through which the air in the interior of the high-voltage battery can flow out when the extinguishing agent flows into the interior of the high-voltage battery.

20. The extinguishing system according to claim 1 , wherein a repair shop is informed as soon as the seal is opened.

Assignees

• Audi Ag

Inventors

• Wlodarczyk Peter

Classifications

• A62C37/40

  with electric connection between sensor and actuator · CPC title

• A62C3/07 Primary

  in vehicles, e.g. in road vehicles · CPC title

• H01M2200/103

  Fuse · CPC title

• G08B17/00

  Fire alarms; Alarms responsive to explosion · CPC title

• A62C3/16

  in electrical installations, e.g. cableways · CPC title