CN-122001049-A - Multiple redundant power supplies for battery safety systems

Abstract

A vehicle includes a high voltage and a battery safety system configured to disconnect a high voltage battery in response to an unsafe condition. The vehicle includes a first voltage domain having a corresponding voltage and a ground plane, and the battery safety system is in the first voltage domain. The vehicle includes a second voltage domain that powers a component of the vehicle, such as an actuator, a light, a sensor, or a controller. The first DCDC supplies power from the high voltage battery to the first voltage domain and the second DCDC supplies power from the high voltage battery to the second voltage domain. The backup DCDC supplies power from the second voltage domain to the first voltage domain in response to a failure of the first DCDC. The first DCDC may also supply power to the second voltage domain. The capacitor in the second voltage domain may also power the battery safety system.

Inventors

• S.WANG
• L.P.Huang
• A. KUMAR

Assignees

• 瑞维安知识产权控股有限责任公司

Dates

Publication Date

20260508

Application Date

20251110

Priority Date

20241108

Claims (20)

1. 1. A system, the system comprising: A high voltage battery having a voltage of at least 200 volts at a full state of charge (SOC); A battery safety system configured to disconnect the high voltage battery in response to an unsafe condition; A first voltage domain, the battery safety system being in the first voltage domain; a first direct current-direct current converter (DCDC) configured to supply power from the high voltage battery to the first voltage domain; A second voltage domain, and A backup DCDC configured to supply power from the second voltage domain to the first voltage domain in response to a failure of the first DCDC.
2. 2. The system of claim 1, wherein the battery safety system comprises one or more pyrotechnic drivers, each configured to detonate a pyrotechnic device.
3. 3. The system of claim 1, wherein the battery safety system comprises a battery monitor.
4. 4. The system of claim 1, wherein the first voltage domain and the second voltage domain have different nominal voltages.
5. 5. The system of claim 1, wherein a nominal voltage of the first voltage domain is greater than a nominal voltage of the second voltage domain.
6. 6. The system of claim 1, wherein the first voltage domain and the second voltage domain have different ground planes.
7. 7. The system of claim 1, wherein the first voltage domain and the second voltage domain have a nominal voltage of less than 50 volts.
8. 8. The system of claim 1, further comprising a second DCDC configured to supply power from the high voltage battery to the second voltage domain.
9. 9. The system of claim 8, wherein the first DCDC is configured to supply power to both the first voltage domain and the second voltage domain.
10. 10. The system of claim 9, wherein a maximum sustained output power capacity of the second DCDC is at least ten times a maximum sustained output power capacity of the first DCDC.
11. 11. The system of claim 1, further comprising a low voltage battery configured to power the second voltage domain, the low voltage battery having a voltage of less than 50 volts at full SOC.
12. 12. The system of claim 1, further comprising a plurality of vehicle components coupled to the second voltage domain.
13. 13. The system of claim 12, wherein the plurality of vehicle components comprises at least one of an actuator, a light, a sensor, or a controller.
14. 14. The system of claim 1, further comprising a capacitor in the first voltage domain configured to power the battery safety system upon the backup DCDC fault.
15. 15. The system of claim 14, wherein the capacitor is connected to the second voltage domain and is configured to power the battery safety system through the backup DCDC.
16. 16. A vehicle, the vehicle comprising: A high voltage battery having a voltage of at least 200 volts at a full state of charge (SOC); One or more drive units configured to propel the vehicle via power received from the high voltage battery; A battery safety system configured to disconnect the high voltage battery in response to an unsafe condition; A first voltage domain, the battery safety system being in the first voltage domain; a first direct current-direct current converter (DCDC) configured to supply power from the high voltage battery to the first voltage domain; A second voltage domain; A second DCDC configured to supply power from the high voltage battery to the second voltage domain; A plurality of vehicle components coupled to the second voltage domain, the plurality of vehicle components including at least one of an actuator, a light, a sensor, or a controller, and A backup DCDC configured to supply power from the second voltage domain to the first voltage domain in response to a failure of the first DCDC.
17. 17. The vehicle of claim 16, wherein the battery safety system comprises one or more pyrotechnic drivers each configured to detonate a pyrotechnic device.
18. 18. The vehicle according to claim 16, wherein: the first DCDC is configured to supply power to both the first voltage domain and the second voltage domain, and The maximum sustained output power capacity of the second DCDC is at least ten times the maximum sustained output power capacity of the first DCDC.
19. 19. The vehicle of claim 16, further comprising a low voltage battery configured to power the second voltage domain, the low voltage battery having a voltage of less than 50 volts at full SOC.
20. 20. The vehicle of claim 16, further comprising a capacitor in the first voltage domain, the capacitor configured to power the battery safety system upon failure of the backup DCDC, the capacitor connected to the second voltage domain and configured to power the battery safety system through the backup DCDC.

Description

Multiple redundant power supplies for battery safety systems Related patent application The present application claims the benefit of U.S. provisional application serial No. 63/718,479 filed on 8/11/2024 and entitled "MULTIPLE redundant power supply for battery safety systems," which is hereby incorporated by reference in its entirety. Disclosure of Invention In one aspect, a system includes a high voltage battery having a voltage of at least 200 volts at a full state of charge (SOC). The system includes a battery safety system configured to disconnect the high voltage battery in response to an unsafe condition. The system includes a first voltage domain in which the battery safety system is located. A first direct current-to-direct current converter (DCDC) is configured to supply power from the high voltage battery to the first voltage domain. The system also includes a second voltage domain and a backup DCDC configured to supply power from the second voltage domain to the first voltage domain in response to a failure of the first DCDC. In some embodiments, the battery safety system includes one or more pyrotechnic actuators each configured to detonate a pyrotechnic device. In some embodiments, the battery safety system includes a battery monitor. In some embodiments, the first voltage domain and the second voltage domain have different nominal voltages. In some embodiments, the nominal voltage of the first voltage domain is greater than the nominal voltage of the second voltage domain. In some embodiments, the first voltage domain and the second voltage domain have different ground planes. In some embodiments, the first voltage domain and the second voltage domain have a nominal voltage of less than 50 volts. In some embodiments, the system further comprises a second DCDC configured to supply power from the high voltage battery to the second voltage domain. In some embodiments, the first DCDC is configured to supply power to both the first voltage domain and the second voltage domain. In some embodiments, the maximum sustained output power capacity of the second DCDC is at least ten times the maximum sustained output power capacity of the first DCDC. In some embodiments, the system further comprises a low voltage battery configured to power the second voltage domain, the low voltage battery having a voltage of less than 50 volts at full SOC. In some embodiments, the system further comprises a plurality of vehicle components coupled to the second voltage domain. In some embodiments, the plurality of vehicle components includes at least one of an actuator, a light, a sensor, or a controller. In some embodiments, the system further comprises a capacitor in the first voltage domain, the capacitor configured to power the battery safety system upon failure of the backup DCDC. In some embodiments, the capacitor is connected to the second voltage domain and is configured to supply power to the battery safety system through the backup DCDC. In another aspect, a vehicle includes a high voltage battery having a voltage of at least 200 volts at a full state of charge (SOC). The vehicle includes one or more drive units configured to propel the vehicle via electrical power received from the high voltage battery. The battery safety system is configured to disconnect the high voltage battery in response to an unsafe condition. The vehicle includes a first voltage domain in which the battery safety system is located. The vehicle includes a first direct current-direct current converter (DCDC) configured to supply power from the high voltage battery to the first voltage domain. The vehicle includes a second voltage domain and a second DCDC configured to supply power from the high voltage battery to the second voltage domain. The vehicle includes a plurality of vehicle components coupled to the second voltage domain, the plurality of vehicle components including at least one of an actuator, a light, a sensor, or a controller. The vehicle includes a backup DCDC configured to supply power from the second voltage domain to the first voltage domain in response to a failure of the first DCDC. In some embodiments, the battery safety system includes one or more pyrotechnic actuators each configured to detonate a pyrotechnic device. In some embodiments, the first DCDC is configured to supply power to both the first voltage domain and the second voltage domain. The maximum sustained output power capacity of the second DCDC may be at least ten times the maximum sustained output power capacity of the first DCDC. In some embodiments, the vehicle includes a low voltage battery configured to power the second voltage domain, the low voltage battery having a voltage of less than 50 volts at full SOC. In some embodiments, the vehicle includes a capacitor in the first voltage domain, the capacitor configured to power the battery safety system upon failure of the backup DCDC, the capacitor connected to the second voltage domain and configured