Power supply circuit and vehicle

Abstract

The invention discloses a power supply circuit and a vehicle. The power supply circuit comprises a starting battery, a redundant battery, a first switch, a second switch and a switch control device. Two ends of the first switch are respectively connected with the starting battery and a vehicle load of the vehicle, the first switch is turned on, and the starting battery supplies power to the vehicle load; two ends of the second switch are respectively connected with the redundant battery and the vehicle load, the second switch is switched on, and the redundant battery supplies power to the vehicle load; and the switch control device is used for switching on the second switch in response to the situation that the residual electric quantity of the starting battery is discharged below a first electric quantity threshold value and the residual electric quantity of the redundant battery is not lower than a second electric quantity threshold value under the condition that the first switch is switched on and the second switch is switched off. According to the power supply circuit, power is supplied to the vehicle load through the redundant battery, and the success rate of vehicle normal operation, the success rate of data backup and the success rate of vehicle starting are improved.

Description

Technical Field

[0001] The present application relates to the field of autonomous driving technology, and more specifically, to a power supply circuit and a vehicle. Background Art

[0002] At present, the vehicle's starting battery is used to power the vehicle's loads to enable the vehicle to operate normally, and to back up the data generated during operation locally or in the cloud; of course, if the vehicle is powered off, the starting battery can also be used to start the vehicle. However, with this technical solution, there are situations where the vehicle cannot operate normally, the vehicle data backup fails, or the vehicle cannot start. Summary of the invention

[0003] In view of this, the present application proposes a power supply circuit and a vehicle to solve the above problems.

[0004] In a first aspect, an embodiment of the present application provides a power supply circuit, the power supply circuit comprising a starting battery, a redundant battery, a first switch, a second switch, and a switch control device;

[0005] Two ends of the first switch are respectively connected to the starting battery and the vehicle load of the vehicle, and when the first switch is turned on, the starting battery supplies power to the vehicle load;

[0006] Two ends of the second switch are connected to the redundant battery and the vehicle load respectively, and when the second switch is turned on, the redundant battery supplies power to the vehicle load;

[0007] The switch control device is used to turn on the second switch in response to the remaining power of the startup battery being discharged below the first power threshold and the remaining power of the redundant battery being not less than the second power threshold when the first switch is turned on and the second switch is turned off.

[0008] In a second aspect, an embodiment of the present application provides a vehicle, the vehicle comprising the power supply circuit of the first aspect.

[0009] Embodiments of the present application provide a power supply circuit and a vehicle. In the present application, when the first switch is turned on and the second switch is turned off, the vehicle load is powered only by the starting battery. When the remaining power of the starting battery discharges below the first power threshold, it means that the remaining power of the starting battery is low, and the starting battery does not have enough power to achieve normal vehicle operation, complete data backup failure, or start the vehicle. At the same time, when the remaining power of the redundant battery is not lower than the second power threshold, it means that the remaining power of the redundant battery is high, and the redundant battery has enough power to achieve normal vehicle operation, complete data backup failure, and start the vehicle. At this time, the second switch is turned on, and the vehicle load is powered by the redundant battery, so that the vehicle can operate normally, successfully complete data backup failure, and successfully start, improving the success rate of normal vehicle operation, data backup success rate, and vehicle start success rate.

[0010] These aspects or other aspects of the present application will be more clearly understood in the following description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0012] Figure 1 FIG. shows a schematic structural diagram of a power supply circuit according to an embodiment of the present application.

[0013] Figure 2 FIG. shows a schematic structural diagram of a power supply circuit according to another embodiment of the present application.

[0014] Figure 3 FIG. shows a schematic structural diagram of a power supply circuit according to still another embodiment of the present application.

[0015] Figure 4 shows Figure 3 a schematic diagram of the operation process of the power supply circuit in the corresponding embodiment.

[0016] Figure 5 FIG. shows a structural block diagram of a vehicle according to an embodiment of the present application.

[0017] Reference Signs:

[0018] 100 Power supply circuit 200 Vehicle load 01 Starting battery 02 Redundant battery 03 First switch 04 Second switch 05 Switch control device 06 First power monitoring device 07 Second power monitoring device 900 Vehicle DETAILED DESCRIPTION

[0019] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0020] Referring to Figure 1 , Figure 1 , which shows a schematic structural diagram of a power supply circuit according to an embodiment of the present application. The power supply circuit 100 includes a starting battery 01, a redundant battery 02, a first switch 03, a second switch 04, and a switch control device 05;

[0021] Among them, both ends of the first switch 03 are respectively connected to the starting battery 01 and the vehicle load 200 of the vehicle. When the first switch 03 is turned on, the starting battery 01 supplies power to the vehicle load 200;

[0022] Both ends of the second switch 04 are respectively connected to the redundant battery 02 and the vehicle load 200. When the second switch 04 is turned on, the redundant battery 02 supplies power to the vehicle load 200;

[0023] The switch control device 05 is configured to turn on the second switch 04 in response to the remaining power of the starting battery 01 discharging below a first power threshold and the remaining power of the redundant battery 02 not being lower than a second power threshold when the first switch 03 is turned on and the second switch 04 is turned off.

[0024] In the present application, the vehicle can be an electric vehicle or a fuel vehicle, and the vehicle can be a sedan, an SUV, a bus, a truck, etc.

[0025] Both the starting battery and the redundant battery can be used to supply power to the vehicle loads that consume electricity in the vehicle. The vehicle loads can be, for example, an engine igniter, a music player, and lights.

[0026] Of course, when the vehicle is an electric vehicle, the vehicle can also have a power battery for providing power during the driving process of the vehicle.

[0027] In the present application, both the redundant battery and the starting battery can be 12V lead-acid batteries. Of course, the capacity of the redundant battery and the capacity of the starting battery are not limited in the present application and can be selected based on requirements and costs.

[0028] The first switch and the second switch can be push-button switches, slide switches, touch switches, etc. The switch control device can be an independent controller, or an in-vehicle communication terminal or a central processing unit that integrates the control functions in the present application.

[0029] The first power threshold and the second power threshold can be values set based on requirements, usually in the form of a percentage (i.e., the percentage of the remaining power in the total power). For example, the first power threshold is 10%, and the second power threshold is 30%.

[0030] In some embodiments, the second power threshold can be determined according to the vehicle state of the vehicle. The vehicle state of the vehicle can include environmental temperature, driving speed, working mode, etc. Generally speaking, the lower the environmental temperature, the higher the power consumption, the more electric energy the redundant battery needs to provide, and the higher the second power threshold. The greater the driving speed, the more electric energy the vehicle of the present application can generate, the less electric energy the redundant battery needs to provide, and the smaller the second power threshold. The more complex the working mode (such as turning on music, video, and lights), the more electric energy the vehicle needs to consume, the more electric energy the redundant battery needs to provide, and the higher the second power threshold.

[0031] Generally, when the remaining power of the starting battery is not lower than the first power threshold, the first switch is turned on and the second switch is turned off, and only the starting battery supplies power to the vehicle load. And the switch control device obtains the remaining power of the starting battery and the remaining power of the redundant battery. When the remaining power of the starting battery discharges below the first power threshold, it is determined that the remaining power of the starting battery is less. At this time, the redundant battery is needed to supply power. If the remaining power of the redundant battery is not lower than the second power threshold, it means that the remaining power of the redundant battery is high and can supply power. Thus, the second switch is turned on to supply power through the redundant battery to ensure that the vehicle load can obtain sufficient electric energy to start the vehicle or back up data.

[0032] In some embodiments, the switch control device is further configured to, after turning on the second switch, output a second prompt message for prompting that the remaining power of the starting battery is insufficient and the power is supplied by the redundant battery, so as to prompt the user that the remaining power of the current starting battery is insufficient and the power is supplied by the redundant battery, so that the user can charge the starting battery in time.

[0033] Among them, the second prompt message can be displayed on the screen of the vehicle or prompted by voice through the speaker of the vehicle.

[0034] In still other embodiments, the switch control device is further configured to, when the first switch is turned on and the second switch is turned off, in response to the remaining power of the starting battery discharging below the first power threshold and the remaining power of the redundant battery being lower than the second power threshold, output a third prompt message for prompting that the remaining power of the redundant battery is insufficient, so that the user can charge the starting battery in time.

[0035] Of course, the third prompt message here can also be used to prompt that the remaining power of the starting battery is insufficient, so that the user can charge the starting battery and the redundant battery in time.

[0036] Among them, the third prompt message can be displayed on the vehicle's screen or prompted by voice through the vehicle's speaker.

[0037] During the vehicle's driving, power can be generated through the vehicle's driving to charge the starting battery and the redundant battery. Of course, the user can separately take out the starting battery and the redundant battery to manually charge the starting battery and the redundant battery.

[0038] In this embodiment, when the first switch is turned on and the second switch is turned off, the vehicle load is powered only by the starting battery. When the remaining power of the starting battery discharges below the first power threshold, it means that the remaining power of the starting battery is low, and the starting battery does not have enough power to achieve normal vehicle operation, complete data backup failure, or start the vehicle. At the same time, when the remaining power of the redundant battery is not lower than the second power threshold, it means that the remaining power of the redundant battery is high, and the redundant battery has enough power to achieve normal vehicle operation, complete data backup failure, and start the vehicle. At this time, turn on the second switch and power the vehicle load through the redundant battery, so that the vehicle can operate normally, successfully complete data backup failure, and successfully start, improving the success rate of normal vehicle operation, data backup success rate, and vehicle starting success rate.

[0039] In some embodiments, reference can be continued to Figure 1 the structure of the power supply circuit 100, and the switch control device 05 is further configured to, when the first switch 03 is turned on and the second switch 04 is turned off, in response to the remaining power of the starting battery 01 discharging below the first power threshold and the remaining power of the redundant battery 02 not being lower than the second power threshold, turn off the first switch 03.

[0040] That is to say, while turning on the second switch, turn off the first switch, so that the starting battery no longer continues to power the vehicle load, and only the redundant battery powers the vehicle load, reducing the continuous power consumption of the starting battery and preventing the situation where the remaining power of the starting battery is too low, resulting in a reduction in the service life of the starting battery, thereby effectively improving the service life of the starting battery.

[0041] In some embodiments, reference can be continued to Figure 1 the structure of the power supply circuit 100, and the switch control device 05 is further configured to, when the vehicle is in a power-off state, the first switch 03 is turned on, and the second switch 04 is turned off, in response to the remaining power of the starting battery 01 discharging below the first power threshold and the remaining power of the redundant battery 02 not being lower than the second power threshold, turn on the second switch 04.

[0042] That is to say, when the vehicle is in the power-off state and cannot charge the starting battery by driving. At this time, when the first switch is turned on and the second switch is turned off, if the remaining power of the starting battery discharges below the first power threshold and the remaining power of the redundant battery is not lower than the second power threshold, it means that the remaining power of the starting battery is low. It is difficult for the vehicle to achieve normal operation, complete data backup failure, and start the vehicle with the starting battery, and the remaining power of the redundant battery is high. With the redundant battery, the vehicle can achieve normal operation, complete data backup failure, and start the vehicle, etc. Therefore, the second switch is turned on to supply power through the redundant battery to ensure that the vehicle load can obtain sufficient electrical energy to start the vehicle again or backup data.

[0043] It can be understood that in this embodiment, the switch control device can also, when the vehicle is in the power-off state, the first switch is turned on, and the second switch is turned off, in response to the remaining power of the starting battery discharging below the first power threshold and the remaining power of the redundant battery not being lower than the second power threshold, turn on the second switch and turn off the first switch, so that the starting battery no longer supplies power to the vehicle load, and only the redundant battery supplies power to the vehicle load, reducing the continuous power consumption of the starting battery and preventing the situation where the remaining power of the starting battery is too low, resulting in a reduction in the service life of the starting battery, thereby effectively improving the service life of the starting battery.

[0044] In some embodiments, reference can continue to be made to Figure 1 the structure of the power supply circuit 100. The switch control device 05 is further configured to, after turning off the first switch 03 and turning on the second switch 04, in response to the remaining power of the redundant battery 02 discharging below the second power threshold, turn on the first switch 02 and turn off the second switch 04.

[0045] That is to say, after supplying power to the vehicle load through the redundant battery and the starting battery stops supplying power to the vehicle load, the remaining power of the redundant battery will be continuously consumed. At this time, the remaining power of the redundant battery is detected. When the remaining power of the redundant battery discharges below the second power threshold, it means that the remaining power of the redundant battery is low. In order to reduce the continuous power consumption of the redundant battery and prevent the situation where the remaining power of the redundant battery is too low, resulting in a reduction in the service life of the redundant battery, the first switch can be turned on and the second switch can be turned off, and the starting battery is used to supply power to the vehicle load, thereby improving the service life of the redundant battery.

[0046] Of course, after turning on the first switch and turning off the second switch, a first prompt message for prompting that the remaining power of the redundant battery is insufficient can also be output to prompt the user to charge the redundant battery in time.

[0047] It can be understood that being powered by the redundant battery here means that the remaining capacity of the starting battery is also less than the first power threshold. Therefore, the first prompt message here can also be used to prompt that the remaining power of the starting battery is insufficient, so that the user can charge the starting battery and the redundant battery in time.

[0048] Among them, the first prompt message can be displayed on the vehicle's screen or prompted by voice through the vehicle's speaker.

[0049] In some embodiments, reference can continue to be made to Figure 1 the structure of the power supply circuit 100 in, the switch control device 05 is further configured to, after disconnecting the first switch 03 and closing the second switch 04, in response to the vehicle entering the power-on state, close the first switch 03 and disconnect the second switch 04.

[0050] That is to say, after the vehicle is powered off, when the remaining power of the starting battery discharges below the first power threshold and the remaining power of the redundant battery is not lower than the second power threshold, the first switch is disconnected and the second switch is closed to supply power to the vehicle load through the redundant battery. After that, if it is detected that the vehicle is powered on, it means that the vehicle can charge the starting battery during the driving process. At this time, although the remaining power of the starting battery is insufficient (less than the first power threshold), the starting battery can continue to be charged and the starting battery can have enough power to supply power to the vehicle load. Therefore, the power supply can be switched to the starting battery, and at this time, the first switch can be closed and the second switch can be disconnected.

[0051] Furthermore, the switch control device is further configured to, in response to the vehicle entering the power-on state and the remaining power of the starting battery being charged to not less than the first power threshold, close the first switch and disconnect the second switch.

[0052] That is to say, after the vehicle is powered off, when the remaining power of the starting battery discharges below the first power threshold and the remaining power of the redundant battery is not lower than the second power threshold, the first switch is disconnected and the second switch is closed to supply power to the vehicle load through the redundant battery. After that, if it is detected that the vehicle is powered on, although the vehicle can charge the starting battery during the driving process, the remaining power of the starting battery is still insufficient (less than the first power threshold). Therefore, after the vehicle is powered on, it is necessary to wait until the remaining power of the starting battery is sufficient (not less than the first power threshold) before switching to the starting battery to supply power, so as to reduce the situation where the power supply to the vehicle load is insufficient and the data backup of the vehicle fails when switching the power supply of the starting battery when the remaining power of the starting battery is insufficient, and improve the success rate of data backup.

[0053] In some embodiments, reference can be made to Figure 2The structure of the power supply circuit 100. The power supply circuit further includes a first power quantity monitoring device 06 and a second power quantity monitoring device 07 connected to the switch control device 05; the first power quantity monitoring device 06 is connected to the starting battery 01 for monitoring the remaining power quantity of the starting battery 01; the second power quantity monitoring device 07 is connected to the redundant battery 02 for monitoring the remaining power quantity of the redundant battery 02.

[0054] That is to say, in this embodiment, the remaining power quantity of the starting battery is monitored by the first power quantity monitoring device and sent to the switch control device. At the same time, the remaining power quantity of the redundant battery is monitored by the second power quantity monitoring device and sent to the switch control device. The switch control device conducts the first switch, disconnects the first switch, conducts the second switch, disconnects the first switch, etc. based on the received remaining power quantity of the starting battery and the remaining power quantity of the redundant battery.

[0055] In this embodiment, the remaining power quantity of the starting battery and the remaining power quantity of the redundant battery are monitored through the first power quantity monitoring device and the second power quantity monitoring device, realizing accurate monitoring of the remaining power quantity. Thus, the accuracy of controlling the first switch and the second switch according to the monitored remaining power quantity of the starting battery and the remaining power quantity of the redundant battery is improved, making the power supply effect of the power supply circuit better.

[0056] In some embodiments, the power supply circuit 100 is as Figure 3 shown. The positive electrode of the first power quantity monitoring device 06 is connected to the positive electrode of the starting battery 01, and the negative electrode of the first power quantity monitoring device 06 and the negative electrode of the starting battery 01 are both grounded. Thus, the starting battery 01 can supply power to the first power quantity monitoring device 06, and the first power quantity monitoring device 06 can monitor the remaining power quantity of the starting battery 01; similarly, the positive electrode of the second power quantity monitoring device 07 is connected to the positive electrode of the redundant battery 02, and the negative electrode of the second power quantity monitoring device 07 and the negative electrode of the redundant battery 02 are both grounded. Thus, the redundant battery 02 can supply power to the second power quantity monitoring device 07, and the second power quantity monitoring device 07 can monitor the remaining power quantity of the redundant battery 02.

[0057] Continuing to refer to Figure 3 , the negative electrode of the vehicle load 200 is grounded, the positive electrode of the vehicle load 200 is connected to one end of the first switch 03, and the other end of the first switch 03 is connected to the positive electrode of the starting battery 01. Thus, when the first switch 03 is conducted, the starting battery 01 can supply power to the vehicle load 200; similarly, the positive electrode of the vehicle load 200 is connected to one end of the second switch 04, and the other end of the second switch 04 is connected to the positive electrode of the redundant battery 02. Thus, when the second switch 04 is conducted, the redundant battery 02 can supply power to the vehicle load 200.

[0058] Continue to refer to Figure 3 The switch control device 05 is respectively connected to the first switch 03, the second switch 04, the first power monitoring device 06, and the second power monitoring device 07 to control the first switch 03 and the second switch 02, and obtain the remaining power of the starting battery 01 and the remaining power of the redundant battery 02.

[0059] Based on Figure 3 the power supply circuit, the operation process of the power supply circuit is as Figure 4 shown below:

[0060] S11. Set the first power threshold a.

[0061] S12. Set the second power threshold b.

[0062] S13. Power off the vehicle. After the vehicle is powered off, the starting battery first supplies power to the vehicle load: the first switch is turned on, and the second switch is turned off.

[0063] S14. Monitor the remaining power of the starting battery.

[0064] S15. Monitor the remaining power of the redundant battery. During the power supply process of the starting battery, the remaining power of the starting battery is monitored by the first power monitoring device, and the remaining power of the redundant battery is monitored by the second power monitoring device.

[0065] S16. Determine whether the remaining power of the starting battery is lower than a. If not, it means that the remaining power of the starting battery is sufficient, and continue to supply power through the starting battery, then return to S14; if so, it means that the remaining power of the starting battery is insufficient, and execute S17.

[0066] S17. Determine whether the remaining power of the redundant battery is lower than b. If so, it means that the remaining power of the redundant battery is insufficient, and execute S18; if not, it means that the remaining power of the redundant battery is sufficient, and execute S19.

[0067] S18. Output a prompt message: The remaining power of the redundant battery is insufficient and cannot be used as a backup for starting. That is, at this time, the remaining powers of both the starting battery and the redundant battery are insufficient, and the vehicle cannot be started, and the user needs to charge the starting battery and the redundant battery in time.

[0068] S19. Turn on the second switch and turn off the first switch. To supply power to the vehicle load through the redundant battery.

[0069] S20. Output a prompt message: The remaining power of the starting battery is insufficient, and the redundant battery supplies power. This means that the remaining power of the redundant battery is sufficient and the vehicle can be started.

[0070] S21. Power on the vehicle.

[0071] S22. Turn on the first switch and turn off the second switch. That is to say, if it is detected that the vehicle is powered on and the remaining power of the starting battery is charged to no less than the first power threshold a, turn on the first switch SW1 and turn off the second switch SW2 to supply power by the starting battery.

[0072] S23. Monitor the remaining power of the redundant battery.

[0073] S24. Determine whether the remaining power of the redundant battery is lower than b. That is to say, during the power supply process by the redundant battery, continue to monitor the remaining power of the redundant battery and continue to determine whether the remaining power of the redundant battery is lower than b. If not, it means that the remaining power of the redundant battery is sufficient, and return to execute S24; if so, it means that the remaining power of the redundant battery is insufficient, and at this time, execute S25.

[0074] S25. Turn on the first switch, turn off the second switch, and display a prompt message: The remaining power of the redundant battery is insufficient and cannot be used for backup starting. That is, at this time, the remaining powers of both the starting battery and the redundant battery are insufficient and the vehicle cannot be started, and the user needs to charge the starting battery and the redundant battery in time.

[0075] Please refer to Figure 5 , which shows a structural block diagram of a vehicle 900 provided by an embodiment of the present application. The power supply circuit 100 and the vehicle load 200 in any of the foregoing embodiments.

[0076] Among them, the vehicle load 200 may include devices or apparatuses driven by electric energy such as a central processor of the vehicle, a starting ignition device, a music player, lights, a seat heater, a memory, a radar, a camera, and a central control screen of the vehicle.

[0077] In several embodiments provided by the present application, the coupling between modules may be electrical, mechanical or other forms of coupling.

[0078] In addition, in each embodiment of the present application, each functional module may be integrated in a processing module, or each module may exist physically alone, or two or more modules may be integrated in one module. The above integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A power supply circuit, characterized in that: The power supply circuit includes a starting battery, a redundant battery, a first switch, a second switch and a switch control device; The two ends of the first switch are respectively connected to the starting battery and the vehicle load of the vehicle, and when the first switch is turned on, the starting battery supplies power to the vehicle load; The two ends of the second switch are respectively connected to the redundant battery and the vehicle load, and when the second switch is turned on, the redundant battery supplies power to the vehicle load; The switch control device is used to turn on the second switch in response to the remaining power of the startup battery being discharged below a first power threshold and the remaining power of the redundant battery being not less than a second power threshold when the first switch is turned on and the second switch is turned off.

2. The power supply circuit according to claim 1, characterized in that: The switch control device is also used to turn on the second switch in response to the remaining power of the starting battery being discharged below the first power threshold and the remaining power of the redundant battery being not less than the second power threshold when the vehicle is in a power-off state, the first switch is turned on, and the second switch is turned off.

3. The power supply circuit according to claim 1, characterized in that: The switch control device is further configured to disconnect the first switch in response to the remaining power of the startup battery being discharged below the first power threshold and the remaining power of the redundant battery being not less than a second power threshold when the first switch is turned on and the second switch is turned off.

4. The power supply circuit according to claim 3, characterized in that: The switch control device is further configured to, after disconnecting the first switch and connecting the second switch, in response to the remaining power of the redundant battery being discharged below the second power threshold, turn on the first switch and disconnect the second switch.

5. The power supply circuit according to claim 4, characterized in that: The switch control device is further configured to output first prompt information for prompting that the remaining power of the redundant battery is insufficient after the first switch is turned on and the second switch is turned off.

6. The power supply circuit according to claim 3, characterized in that: The switch control device is further configured to, after disconnecting the first switch and connecting the second switch, in response to the vehicle entering a power-on state, connect the first switch and disconnect the second switch.

7. The power supply circuit according to claim 6, characterized in that: The switch control device is further used to turn on the first switch and turn off the second switch in response to the vehicle entering a power-on state and the remaining power of the starting battery being charged to no less than the first power threshold.

8. The power supply circuit according to claim 1, characterized in that: The power supply circuit also includes a first power monitoring device and a second power monitoring device connected to the switch control device; The first power monitoring device is connected to the starting battery and is used to monitor the remaining power of the starting battery; The second power monitoring device is connected to the redundant battery and is used to monitor the remaining power of the redundant battery.

9. The power supply circuit according to claim 1, characterized in that: The switch control device is further used to output second prompt information for prompting that the remaining power of the starting battery is insufficient and that power is supplied by the redundant battery after the second switch is turned on.

10. The power supply circuit according to claim 1, characterized in that: The switch control device is further used to output a third prompt information for prompting that the remaining power of the redundant battery is insufficient in response to the remaining power of the starting battery being discharged below the first power threshold and the remaining power of the redundant battery being lower than the second power threshold when the first switch is turned on and the second switch is turned off.

11. A vehicle, characterized in that: The vehicle comprises a power supply circuit as claimed in any one of claims 1-10.

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