CN-122008877-A - Power supply system, control method, vehicle and related equipment

Abstract

The disclosure relates to a power supply system, a control method, a vehicle and related equipment, and relates to the technical field of automobile controller testing. The power supply system comprises a battery pack, a first switch assembly, a first direct current/direct current (DC/DC) converter, a second DC/DC converter and a second DC/DC converter, wherein a first end of the first switch assembly is connected with the battery pack, a second end of the first switch assembly is connected with a first load, the battery pack is connected with the first load according to a first control instruction, the battery pack is connected with the first load or disconnected from the first load according to a first control instruction, a first end of the first DC/DC converter is connected with the first end of the first switch assembly, a second end of the first DC/DC converter is connected with a second load, and a first end of the second DC/DC converter is connected with the second load. The power supply reliability and the safety of the power supply system can be improved.

Inventors

• REN DEQIANG

Assignees

• 小米汽车科技有限公司

Dates

Publication Date

20260512

Application Date

20260327

Claims (20)

1. 1. A power supply system, comprising: a battery pack; the first end of the first switch assembly is connected with the battery pack, and the second end of the first switch assembly is connected with a first load and is used for connecting or disconnecting the battery pack with the first load according to a first control instruction; A first direct current/direct current (DC/DC) converter, wherein a first end of the first DC/DC converter is connected with a first end of the first switch assembly, and a second end of the first DC/DC converter is connected with a second load; And a second DC/DC converter, wherein a first end of the second DC/DC converter is connected with a second end of the first switch assembly, and a second end of the first DC/DC converter is connected with the second load.
2. 2. The power system of claim 1, wherein the first control command comprises a first off command, and wherein the first switch assembly comprises: A first switch having a first end connected to the positive terminal of the battery pack and a first positive terminal of the first DC/DC converter, respectively, and a second end connected to the positive terminal of the first load and a first positive terminal of the second DC/DC converter, respectively, for turning off in response to a first turn-off command for disconnecting the positive terminal of the battery pack from the positive terminal of the first load and the positive terminal of the battery pack from the first positive terminal of the second DC/DC converter, respectively, the first turn-off command being used to characterize the first type of fault occurring in the first load; And a second switch having a first end connected to the negative terminal of the battery pack and the first negative terminal of the first DC/DC converter, respectively, and a second end connected to the negative terminal of the first load and the first negative terminal of the second DC/DC converter, respectively, for turning off in response to the first turn-off command to disconnect the negative terminal of the battery pack from the negative terminal of the first load and the negative terminal of the battery pack from the first negative terminal of the second DC/DC converter.
3. 3. The power supply system of claim 2, wherein the battery pack comprises: the positive end of the first battery module is connected with the first end of the first switch; the negative electrode end of the second battery module is connected with the first end of the second switch; the power supply system further includes: The first end of the second switch component is connected with the negative electrode end of the first battery module, the second end of the second switch component is connected with the positive electrode end of the second battery module, the third end of the second switch component is connected with the second end of the first switch, and the fourth end of the second switch component is connected with the second end of the second switch; and the second switch assembly is used for switching the power supply mode of the battery pack by controlling the connection state of the second switch assembly.
4. 4. The power system of claim 3, wherein the second switch assembly comprises a double pole double throw switch comprising: A public terminal; the first fixed end is connected with the negative electrode end of the first battery module; the second fixed end is connected with the positive electrode end of the second battery module; a first selection terminal connected to one of the common terminal or a second terminal of the first switch; and a second selection terminal connected to one of the common terminal or a second terminal of the second switch.
5. 5. The power supply system according to claim 4, characterized in that the power supply system further comprises: The first fuse is connected between the first fixed end and the negative electrode end of the first battery module; And the second fuse is connected between the second fixed end and the positive electrode end of the second battery module.
6. 6. The power system of claim 4, wherein the power supply system further comprises a power supply system, The double-pole double-throw switch is used for controlling the first selection end to be connected with the public end according to the serial control instruction, and the second selection end to be connected with the public end.
7. 7. The power system of claim 4, wherein the power supply system further comprises a power supply system, The double-pole double-throw switch is used for responding to a parallel control instruction and controlling the first selection end to be connected with the second end of the second switch, and the second selection end to be connected with the second end of the first switch; The first switch is further used for responding to a second turn-off instruction to turn off, and cuts off connection between the first battery module and the first load and between the first battery module and the second load, so that the second battery module supplies power for the first load and supplies power for the second load through the second DC/DC converter, and the second turn-off instruction is used for representing that the first battery module breaks down.
8. 8. The power system of claim 4, wherein the power supply system further comprises a power supply system, The double-pole double-throw switch is used for responding to a parallel control instruction and controlling the first selection end to be connected with the second end of the second switch, and the second selection end to be connected with the second end of the first switch; The second switch is further used for responding to a third turn-off instruction to turn off, and cuts off connection between the second battery module and the first load and between the second battery module and the second load, so that the first battery module supplies power to the first load and supplies power to the second load through the second DC/DC converter, and the third turn-off instruction is used for representing that the second battery module breaks down.
9. 9. The power system of claim 5, wherein the power supply system comprises a power supply system, The double-pole double-throw switch is used for responding to a parallel control instruction and controlling the first selection end to be connected with the second end of the first switch and the second selection end to be connected with the second end of the second switch; The first fuse is used for fusing in response to a first fusing instruction so as to cut off the connection between the first battery module and the double-pole double-throw switch; The second switch is further used for responding to a fourth turn-off instruction to turn off, and the connection between the second battery module and the negative end of the first load is cut off.
10. 10. The power system of claim 5, wherein the power supply system comprises a power supply system, The double-pole double-throw switch is used for responding to a parallel control instruction and controlling the first selection end to be connected with the second end of the second switch, and the second selection end to be connected with the second end of the first switch; the second fuse is used for fusing in response to a second fusing instruction so as to cut off the connection between the second battery module and the double-pole double-throw switch; the first switch is further used for responding to a fifth turn-off instruction to turn off, and the connection between the first battery module and the positive end of the first load is cut off.
11. 11. A control method of a power supply system, characterized by comprising: Acquiring the working state of the power supply system; And generating a first control instruction according to the working state of the power supply system to control the first switch assembly to be turned on or turned off so as to switch on or off the connection between the battery pack and the first load, and enabling the battery pack to supply power to the second load through the first DC/DC converter and the second DC/DC converter or enabling the battery pack to supply power to the second load through the second DC/DC converter.
12. 12. The method of claim 11, wherein the first switch assembly comprises a first switch and a second switch, and wherein the first control command comprises a first off command; The generating a first control instruction according to the working state of the power supply system includes: And responding to a first type of faults of a first load of the power supply system, generating a first turn-off instruction, wherein the first turn-off instruction is used for controlling the first switch to be turned off so as to cut off the connection between the positive terminal of the battery pack and the positive terminal of the first load, and controlling the second switch to be turned off so as to cut off the connection between the negative terminal of the battery pack and the negative terminal of the first load, so that the battery pack supplies power for a second load through the second DC/DC converter.
13. 13. The control method of a power supply system according to claim 12, wherein the battery pack includes a first battery module and a second battery module; The control method of the power supply system further comprises the following steps: And responding to a first type of faults of a first load of the power supply system, generating a series control instruction and sending the series control instruction to a double-pole double-throw switch, wherein the series control instruction is used for controlling the first fixed end of the double-pole double-throw switch to be connected with the negative electrode end of a first battery module, the second fixed end of the double-pole double-throw switch is connected with the positive electrode end of a second battery module, the first selection end of the double-pole double-throw switch is connected with a public end, and the second selection end of the double-pole double-throw switch is connected with the public end, so that the first battery module and the second battery module are connected in series and then supply power for the second load.
14. 14. The control method of a power supply system according to claim 12, wherein the battery pack includes a first battery module and a second battery module; The control method of the power supply system further comprises the following steps: Responding to the fault of the first battery module, generating a parallel control instruction and sending the parallel control instruction to a double-pole double-throw switch, wherein the parallel control instruction is used for controlling a first fixed end of the double-pole double-throw switch to be connected with a negative electrode end of the first battery module, a second fixed end of the double-pole double-throw switch is connected with a positive electrode end of the second battery module, a first selection end of the double-pole double-throw switch is connected with a second end of the second switch, and a second selection end of the double-pole double-throw switch is connected with a second end of the first switch; and generating a second turn-off instruction and sending the second turn-off instruction to the first switch, wherein the second turn-off instruction is used for controlling the first switch to turn off, cutting off the connection between the first battery module and the first load and the connection between the first battery module and the second load, so that the second battery module supplies power for the first load and the second load through the double-pole double-throw switch.
15. 15. The control method of a power supply system according to claim 12, wherein the battery pack includes a first battery module and a second battery module; The control method of the power supply system further comprises the following steps: When a second battery module of the power supply system fails, a parallel control instruction is generated and sent to a double-pole double-throw switch, wherein the parallel control instruction is used for controlling a first fixed end of the double-pole double-throw switch to be connected with a negative electrode end of the first battery module, a second fixed end of the double-pole double-throw switch is connected with a positive electrode end of the second battery module, a first selection end of the double-pole double-throw switch is connected with a second end of the second switch, and a second selection end of the double-pole double-throw switch is connected with a second end of the first switch; And generating a third turn-off instruction and sending the third turn-off instruction to the second switch, wherein the third turn-off instruction is used for controlling the second switch to be turned off so as to cut off the connection between the second battery module and the first load and the second load, and the first battery module supplies power to the first load and the second load through the double-pole double-throw switch.
16. 16. The method according to claim 12, wherein the battery pack includes a first battery module and a second battery module; The control method of the power supply system further includes: Generating a first fusing instruction in response to the second type of faults of the first load, wherein the first fusing instruction is used for controlling a first fuse to fuse so as to cut off the connection between the first battery module and a double-pole double-throw switch; generating a parallel control instruction and sending the parallel control instruction to a double-pole double-throw switch, wherein the parallel control instruction is used for connecting a first fixed end of the double-pole double-throw switch with a negative electrode end of the first battery module, a second fixed end of the double-pole double-throw switch is connected with a positive electrode end of the second battery module, a first selection end of the double-pole double-throw switch is connected with a second end of the second switch, and a second selection end of the double-pole double-throw switch is connected with a second end of the first switch; And generating a fourth turn-off instruction and sending the fourth turn-off instruction to the second switch, wherein the fourth turn-off instruction is used for controlling the second switch to turn off and cutting off the connection between the second battery module and the negative end of the first load, so that the second battery module supplies power to the second load through the double-pole double-throw switch and the first DC/DC converter.
17. 17. The method of controlling a power supply system according to claim 12, wherein the battery pack includes a first battery module and a second battery module, the power supply system further includes a second fuse, The control method of the power supply system further comprises the following steps: generating a second fusing instruction in response to the second type of faults of the first load, wherein the second fusing instruction is used for controlling a second fuse to fuse so as to cut off the connection between the second battery module and a double-pole double-throw switch; Generating a parallel control instruction and sending the parallel control instruction to the double-pole double-throw switch, wherein the parallel control instruction is used for connecting a first fixed end of the double-pole double-throw switch with a negative electrode end of the first battery module, a second fixed end of the double-pole double-throw switch is connected with a positive electrode end of the second battery module, a first selection end of the double-pole double-throw switch is connected with a second end of the second switch, and a second selection end of the double-pole double-throw switch is connected with a second end of the first switch; And generating a fifth turn-off instruction and sending the fifth turn-off instruction to the first switch, wherein the fifth turn-off instruction is used for controlling the first switch to turn off and cutting off the connection between the first battery module and the positive end of the first load, so that the first battery module supplies power to the second load through the double-pole double-throw switch and the first DC/DC converter.
18. 18. A controller for a power supply system, comprising: A processor; A memory for storing processor-executable instructions; wherein the processor is configured to perform the control method of the power supply system of any of the preceding claims 11-17.
19. 19. A non-transitory computer readable storage medium, characterized in that instructions in the storage medium, when executed by a processor of a vehicle, enable the processor to perform the method of controlling a power supply system according to any one of the preceding claims 11-17.
20. 20. A vehicle, characterized in that it comprises a power supply system according to any one of claims 1-10.

Description

Power supply system, control method, vehicle and related equipment Technical Field The disclosure relates to the technical field of electric power, and in particular relates to a power supply system, a control method, a vehicle and related equipment. Background In the event of a failure of the vehicle, the vehicle protection device may passively and/or actively disconnect the vehicle load from the power source, thereby protecting the vehicle/personnel. After the connection between the load and the power supply is disconnected, the load of the vehicle cannot work normally, and the power supply reliability is reduced. It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art. Disclosure of Invention The present disclosure provides a power supply system, a control method, a vehicle, and related devices. According to a first aspect of embodiments of the present disclosure, there is provided a power supply system including: a battery pack; The first end of the first switch assembly is connected with the battery pack, and the second end of the first switch assembly is connected with the first load and is used for connecting or disconnecting the battery pack with the first load according to a first control instruction; A first DC/DC (Direct Current to Direct Current, direct current/direct current) converter, a first end of the first DC/DC converter being connected to a first end of the first switching assembly, a second end of the first DC/DC converter being connected to a second load; and a second DC/DC converter, a first end of the second DC/DC converter is connected with a second end of the first switch assembly, and a second end of the first DC/DC converter is connected with a second load. In some embodiments of the present disclosure, the first control instruction includes a first off instruction, and the first switch assembly includes: The first switch is connected with the positive electrode end of the battery pack and the first positive electrode end of the first DC/DC converter respectively, the second end of the first switch is connected with the positive electrode end of the first load and the first positive electrode end of the second DC/DC converter respectively, and is used for being turned off in response to a first turn-off instruction so as to disconnect the positive electrode end of the battery pack from the positive electrode end of the first load and connect the positive electrode end of the battery pack from the first positive electrode end of the second DC/DC converter, and the first turn-off instruction is used for representing that the first load has a first type of fault; And the first end of the second switch is respectively connected with the negative end of the battery pack and the first negative end of the first DC/DC converter, the second end of the second switch is respectively connected with the negative end of the first load and the first negative end of the second DC/DC converter, and the second switch is used for being turned off in response to a first turn-off instruction so as to disconnect the connection between the negative end of the battery pack and the negative end of the first load and disconnect the connection between the negative end of the battery pack and the first negative end of the second DC/DC converter. In some embodiments of the present disclosure, a battery pack includes: the positive end of the first battery module is connected with the first end of the first switch; The negative end of the second battery module is connected with the first end of the second switch; the power supply system further includes: the first end of the second switch component is connected with the negative electrode end of the first battery module, the second end of the second switch component is connected with the positive electrode end of the second battery module, the third end of the second switch component is connected with the second end of the first switch, and the fourth end of the second switch component is connected with the second end of the second switch; and the second switch assembly is used for switching the power supply mode of the battery pack by controlling the connection state of the second switch assembly. In some embodiments of the present disclosure, the second switch assembly comprises a double pole double throw switch comprising: A public terminal; the first fixed end is connected with the negative electrode end of the first battery module; The second fixed end is connected with the positive electrode end of the second battery module; A first selection terminal connected to one of the common terminal or the second terminal of the first switch; the second selection terminal is connected with one of the common terminal or the second terminal of the sec