Power supply circuit and control method thereof, electronic device, and vehicle

Abstract

[0003] The present application provides a power supply circuit, a control method thereof, an electronic device, and a vehicle, which may be applied to fields such as intelligent driving, smart homes, and industrial remote control. The power supply circuit includes a first power supply circuit and a second power supply circuit. The first power supply circuit includes a first battery and a DC / DC converter, the input terminal of which is connected to the first battery, and the output terminal of which is configured to supply power to a BMS for the first battery, a controller for the DC / DC converter, and one or more first loads. The second power supply circuit includes a second battery, the second battery is connected to the output terminal of the DC / DC converter via a switch, and the second battery is configured to supply power to the controller for the DC / DC converter and one or more second loads. The solution of the present application can improve the reliability of the power supply circuit.

Description

[Technical Field]

[0001] TECHNICAL FIELD Embodiments of the present application relate to the electronic and electrical fields, and more particularly to power supply circuits, electronic devices, and vehicles. [Background technology]

[0002] As intelligent driving technologies continue to improve, the requirements for low-voltage (12V, 24V, 36V, 48V, etc.) power supplies are also increasing. For example, in-vehicle loads such as in-vehicle infotainment devices, in-vehicle navigation systems, and intelligent driving controllers all require low-voltage power supplies.

[0003] In conventional solutions, two power supply circuits are typically used to supply power to low-voltage loads in a vehicle, and the two power supply circuits are connected via a switch. The first of the two power supply circuits includes a direct current / direct current (DC / DC) converter configured to convert high-voltage power output by a first battery (e.g., a high-voltage battery) into low-voltage power to supply power to one or more low-voltage loads. The second of the two power supply circuits includes a second battery (e.g., a low-voltage battery) similarly configured to supply power to one or more low-voltage loads. During actual operation, if an abnormal voltage or current is detected in either power supply circuit, the switch is turned off to avoid affecting the normal operation of the low-voltage loads in the other power supply circuit. However, if a short-circuit fault occurs in the first power supply circuit and the switch is turned off, the entire first power supply circuit will stop functioning because there is no second battery to supply output current to the first power supply circuit, which will seriously affect the reliability of the power supply circuit. Summary of the Invention [Means for solving the problem]

[0004] Therefore, how to improve the reliability of the power supply circuit is a technical issue that needs to be solved urgently.

[0005] SUMMARY OF THE INVENTION Embodiments of the present application provide a power supply circuit and a control method thereof, an electronic device, and a vehicle to improve the reliability of the power supply circuit.

[0006] According to a first aspect, there is provided a power supply circuit including: a first power supply circuit including a first battery and a DC / DC converter, wherein an input end of the DC / DC converter is connected to the first battery and an output end of the DC / DC converter is configured to supply power to a battery management system (BMS) of the first battery, a controller of the DC / DC converter, and one or more first loads; and a second power supply circuit including a second battery, wherein the second battery is connected to the output end of the DC / DC converter via a switch and the second battery is configured to supply power to the controller of the DC / DC converter and one or more second loads.

[0007] The first battery may be a high-voltage battery and configured to output high-voltage power. The DC / DC converter is configured to convert the high-voltage power of the first battery to low-voltage power. The second battery may be a low-voltage battery and configured to output low-voltage power.

[0008] Optionally, a second power supply circuit may alternatively be connected to the BMS to implement redundant power supply for the BMS.

[0009] Based on the power supply circuit, when the first power supply circuit is unable to supply power to the BMS, the DC / DC converter, and other loads due to a short-circuit fault and is switched off, the BMS of the first battery generally includes a built-in capacitor, which allows the BMS to control the first battery to output high-voltage power for a short period of time. In addition, the second power supply circuit can supply power to the controller of the DC / DC converter, which controls the DC / DC converter to convert the high-voltage power to low-voltage power, thereby maintaining current output and blowing a fuse at the location where the fault occurs, thereby restoring the power supply of the first power supply circuit.

[0010] The power supply circuit provided in this embodiment of the present application includes a first power supply circuit and a second power supply circuit. The first power supply circuit includes a first battery and a DC / DC converter. The output end of the DC / DC converter is configured to supply power to the BMS of the first battery, the controller of the DC / DC converter, and the first load. The second power supply circuit includes a second battery configured to supply power to the controller of the DC / DC converter and the second load. The second battery is connected to the output end of the DC / DC converter via a switch. Therefore, when the voltage or current of one power supply circuit is abnormal, the switch can be turned off to prevent a fault in one power supply circuit from affecting the normal operation of a low-voltage load in the other power supply circuit. In addition, the first power supply circuit supplies power to the BMS of the first battery in the first power supply circuit, and the first power supply circuit and the second power supply circuit supply power to the controller of the DC / DC converter. In this way, when a short-circuit fault occurs in the first power supply circuit, the DC / DC converter can be controlled, under the action of the BMS and the controller of the DC / DC converter, to output current and thus restore the power supply of the first power supply circuit, thereby improving the reliability of the power supply circuit.

[0011] With respect to the first aspect, in some implementations of the first aspect, the switch is configured to be on in a normal state, and when a short-circuit fault occurs in a third load of the one or more first loads, the switch is configured to switch from on to off.

[0012] Specifically, when the switch is configured to be switched from on to off, the BMS can control the first battery to output high-voltage power for a short period of time, so that the controller of the DC / DC converter, under the action of the second power supply circuit, controls the DC / DC converter to convert the high-voltage power into low-voltage power, thereby maintaining the output of current, blowing the fuse connected to the third load, eliminating the short-circuit fault, and thus restoring the power supply of the first power supply circuit. In this way, the reliability of the power supply circuit can be improved.

[0013] Regarding the first aspect, in some implementations of the first aspect, when a short-circuit fault occurs in a third load among the one or more first loads, the first power supply circuit is configured to blow a fuse connected to the third load under the action of the BMS and the controller of the DC / DC converter. In this way, the short-circuit fault is eliminated and the power supply of the first power supply circuit is restored. Therefore, the reliability of the power supply circuit can be improved.

[0014] Regarding the first aspect, in some implementations of the first aspect, the switch is configured to be on in a normal state, and when a fault occurs in the first power supply circuit or the second power supply circuit, the switch is configured to switch from on to off, and when the fault is eliminated, the switch is configured to switch from off to on.

[0015] The second battery has a limited energy storage capacity and can only supply power for a short time, so after the fault is resolved, the switch needs to be configured to switch from off to on so that the first power supply circuit can charge the second battery and supply power to the load in the second power supply circuit.

[0016] The switch of the power supply circuit provided in this embodiment of the present application is configured to be on in a normal state. When a fault occurs in either power supply circuit, the switch is turned off to prevent the fault in the power supply circuit from affecting the normal operation of the low-voltage load in the other power supply circuit. When the fault is resolved, the switch is switched from off to on to prevent the second battery from becoming undercharged and affecting the operation of the associated load. In this way, the reliability of the power supply circuit can be improved.

[0017] With respect to the first aspect, in some implementations of the first aspect, a current or voltage in the first power supply circuit and the second power supply circuit is detected to determine whether a fault has occurred in the first power supply circuit or the second power supply circuit or whether the fault has been resolved.

[0018] With regard to the first aspect, in some implementations of the first aspect, the one or more first loads and the one or more second loads together comprise a fourth load.

[0019] In this embodiment of the present application, the one or more first loads and the one or more second loads both include a fourth load. In this way, when a fault occurs in one of the power supply circuits, the other power supply circuit can still supply power to the fourth load, thereby implementing redundant power supply for the fourth load. Therefore, the reliability of the power supply circuit can be improved.

[0020] Optionally, the fourth load may be a relatively important load. For example, in the field of autonomous driving, the fourth load may be an intelligent driving controller in an intelligent driving vehicle. A redundant power supply for the intelligent driving controller is implemented. As a result, when a failure occurs in one power supply circuit, the intelligent driving controller can still function, preventing the intelligent driving of the vehicle from becoming uncontrollable and providing the user with enough time to take over.

[0021] With respect to the first aspect, in some implementations of the first aspect, the switch is an automatic protection switch.

[0022] According to a second aspect, there is provided a control method for a power supply circuit. The power supply circuit includes a first power supply circuit and a second power supply circuit. The first power supply circuit includes a first battery and a DC / DC converter, the input terminal of which is connected to the first battery, and the output terminal of which is configured to supply power to a BMS for the first battery, a controller for the DC / DC converter, and one or more first loads. The second power supply circuit includes a second battery, the second battery is connected to the output terminal of the DC / DC converter via a switch, and the second battery is configured to supply power to the controller for the DC / DC converter and one or more second loads. The control method includes the steps of detecting fault states in the first power supply circuit and the second power supply circuit, and controlling the switch to be on or off based on the detection result.

[0023] According to the control method provided in this embodiment of the present application, the switches can be controlled based on the fault states of the first power supply circuit and the second power supply circuit to be turned on or off, thus improving the reliability of the power supply circuit.

[0024] Regarding the second aspect, in some implementations of the second aspect, the step of controlling to turn on or off the switch based on the detection result includes a step of controlling to turn off the switch when it is detected that a short-circuit fault has occurred in a third load among the one or more first loads, and a fuse connected to the third load is blown under the action of the BMS and the controller of the DC / DC converter to eliminate the short-circuit fault.

[0025] Based on the control method provided in this embodiment of the present application, when it is detected that a short-circuit fault has occurred in a third load among the one or more first loads, the switch can be controlled to be turned off to prevent the fault in the power supply circuit from affecting the normal operation of the low-voltage load in the other power supply circuit.

[0026] Regarding the second aspect, in some implementations of the second aspect, the step of controlling the switch to be turned on or off based on the detection result includes a step of controlling the switch to be turned off if a fault occurs in the first power supply circuit or the second power supply circuit, or a step of controlling the switch to be turned on if the faults in the first power supply circuit and the second power supply circuit are resolved.

[0027] According to the control method provided in this embodiment of the present application, when a fault occurs in one of the power supply circuits, the switch can be controlled to be turned off to prevent the fault in the power supply circuit from affecting the normal operation of the low-voltage load in the other power supply circuit. In addition, when the fault is eliminated or there is no fault, the switch can be controlled to be turned on to prevent the second battery from being undercharged and affecting the operation of the associated load. In this way, the reliability of the power supply circuit can be improved.

[0028] According to a third aspect, there is provided a control device for a power supply circuit, comprising a module configured to perform the control method according to the second aspect or any one of the possible implementations of the second aspect.

[0029] According to a fourth aspect, there is provided a control device for a power supply circuit, comprising at least one processor coupled to a memory and configured to read and execute instructions in the memory in order to perform the control method according to the second aspect or any one of the possible implementations of the second aspect.

[0030] According to a fifth aspect, there is provided a computer-readable storage medium having computer instructions stored thereon, the computer instructions, when executed on a computer, performing a control method according to the second aspect or any one of possible implementations of the second aspect.

[0031] According to a sixth aspect, there is provided a computer program product comprising instructions which, when executed on a computer, cause the control method according to the second aspect or any one of the possible implementations of the second aspect to be performed.

[0032] According to a seventh aspect, there is provided a computing device including at least one processor and a memory, the at least one processor being coupled to the memory and configured to read and execute instructions in the memory in order to perform a control method according to the second aspect or any one of the possible implementations of the second aspect.

[0033] According to an eighth aspect, there is provided a chip, the chip including a processor and a data interface, the processor reading instructions stored in a memory via the data interface to execute a control method according to the second aspect or any one of possible implementations of the second aspect.

[0034] Optionally, in one embodiment, the chip may further include a memory, the memory storing instructions, and the processor configured to execute the instructions stored in the memory, which, when executed, configures the processor to perform the control method according to the second aspect or any one of the possible implementations of the second aspect.

[0035] According to a ninth aspect, there is provided an electronic device comprising a power supply circuit according to the first aspect or any one of the possible implementations of the first aspect.

[0036] According to a tenth aspect, there is provided a vehicle including a power supply circuit according to the first aspect or any one of the possible implementations of the first aspect.

[0037] With regard to the tenth aspect, in some implementations of the tenth aspect, the one or more first loads and the one or more second loads both include an intelligent driving controller. [Brief explanation of the drawings]

[0038] [Figure 1] FIG. 1 is an example diagram of a conventional architecture of a vehicle. [Figure 2] FIG. 1 is a diagram illustrating a conventional power supply circuit. [Figure 3] FIG. 2 is an example diagram of a power supply circuit according to an embodiment of the present application. [Figure 4] FIG. 10 is an example diagram of the power supply of the second power supply circuit in a fault condition according to an embodiment of the present application. [Figure 5] FIG. 10 is an example diagram of the power supply of the first power supply circuit under different fault conditions according to an embodiment of the present application. [Figure 6] FIG. 10 is an example diagram of another power supply circuit according to an embodiment of the present application. [Figure 7] FIG. 2 is an example diagram of a control method for a power supply circuit according to an embodiment of the present application. [Figure 8] FIG. 1 is an example diagram of a method for controlling fault occurrence according to an embodiment of the present application. [Figure 9]FIG. 2 is an example diagram of a control method for fault clearance according to an embodiment of the present application. [Figure 10] 1 is an example diagram of a control device for a power supply circuit according to an embodiment of the present application; [Figure 11] FIG. 2 is an example block diagram of a hardware structure of a control device for a power supply circuit according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0039] The following describes the technical solutions of the embodiments of the present application with reference to the accompanying drawings.

[0040] The solution of the present application may be applied to a mobile carrier. The mobile carrier may include a land transport vehicle, a water transport vehicle, an air transport vehicle, an industrial device, an agricultural device, a recreational device, etc. For example, the mobile carrier may be a vehicle. The vehicle is a vehicle in the broad sense and may be a transportation vehicle (e.g., a commercial vehicle, a passenger car, a motorcycle, an aircraft, or a train), an industrial vehicle (e.g., a forklift truck, a trailer, or a tractor), an engineering vehicle (e.g., an excavator, a bulldozer, or a crane), an agricultural device (e.g., a lawn mower or a harvester), a recreational device, or a toy vehicle. The type of vehicle is not particularly limited in the embodiments of the present application. As another example, the mobile carrier may be a transportation vehicle such as an airplane or a ship.

[0041] The solution of the present application can be further applied to fields such as intelligent driving, smart home, and industrial remote control.

[0042] For ease of understanding, the following will use an example in which the present application is applied to a vehicle to briefly describe the background technology in the embodiments of the present application.

[0043] FIG. 1 is a diagram illustrating a conventional vehicle architecture. The vehicle may be a new energy vehicle, such as a pure electric vehicle or a hybrid vehicle. As shown in FIG. 1, the conventional architecture 10 includes a first battery 11, a second battery 12, a motor 13, wheels 14, a DC / DC converter 15, a low-voltage load 16, a charging circuit 17, and the like. The second battery 12 may be a low-voltage battery, which can supply power to the low-voltage load 16 and activate the DC / DC converter 15 before the vehicle is started. The first battery 11 may be a high-voltage battery, which is configured to drive the motor 13 after the vehicle is started, which then drives the wheels 14 to rotate, thereby moving the vehicle. In addition, the first battery 11 is further configured to convert high-voltage power to low-voltage power using the DC / DC converter 15 to supply power to the low-voltage load 16 and charge the second battery 12. The charging circuit 17 is configured to connect to an external charging pile or a mobile charging device to charge the first battery 11, or to connect to an external load of the vehicle (e.g., another vehicle) to supply the electrical energy of the first battery 11 to the external load. The low-voltage load 16 may include vehicle loads such as an in-vehicle entertainment device, an in-vehicle navigator, and an intelligent driving controller.

[0044] In the power supply circuit provided in the conventional architecture 10, the DC / DC converter 15, the second battery 12, and the low-voltage loads 16 are directly connected, and the power supply of all the low-voltage loads 16 in the vehicle is aggregated. If a fault occurs in any branch, all the loads in the vehicle are affected. For example, if a short-circuit fault occurs in a specific low-voltage load 16, the fuse may be blown under the action of the second battery 12, but the vehicle voltage may still drop due to the fuse hysteresis (e.g., there may be a 1 s delay in blowing), resulting in the vehicle becoming uncontrollable.

[0045] To improve the reliability of the power supply circuit, a conventional solution further provides a power supply circuit. As shown in FIG. 2, the power supply circuit 20 includes two power supply circuits. The first power supply circuit 21 includes a first battery 211 and a DC / DC converter 212. The input terminal of the DC / DC converter 212 is connected to the first battery 211, and the output terminal of the DC / DC converter 212 may be configured to supply power to a first load 213 in the vehicle. The second power supply circuit 22 includes a second battery 221. The second battery 221 is connected to the output terminal of the DC / DC converter 212 via a switch 23, and the second battery 221 may be configured to supply power to a second load 222. In addition, the power supplies to the first load 213 and the second load 222 may include the same critical load (e.g., a critical load such as an intelligent driving controller). During actual operation, if an abnormal voltage or current is detected in either power supply circuit, the switch will be turned off to avoid affecting the normal operation of the low-voltage load in the other power supply circuit, and after the fault is eliminated, the switch will be turned on.

[0046] However, based on the power supply circuit 20, if a short circuit fault occurs in the first power supply circuit 21 and the switch is turned off, the fuse cannot be blown because there is no second battery 221 to supply output current in the first power supply circuit, so the entire first power supply circuit will be in a non-functional state and the fault cannot be eliminated in the first power supply circuit 21, which will seriously affect the reliability of the power supply circuit.

[0047] Based on this, one embodiment of the present application provides a power supply circuit. In a power supply circuit designed based on the conventional power supply circuit 20, the output end of a DC / DC converter in a first power supply circuit supplies power to a battery management system (BMS) of a first battery and a controller of the DC / DC converter, and a second battery in a second power supply circuit supplies power to the controller of the DC / DC converter. In this way, when a short-circuit fault occurs in the first power supply circuit, the DC / DC converter can be controlled under the action of the BMS and the controller of the DC / DC converter to output current and thus restore the power supply of the first power supply circuit. In this way, the reliability of the power supply circuit can be improved.

[0048] FIG. 3 is an example diagram of a power supply circuit according to an embodiment of the present application. As shown in FIG. 3, the power supply circuit 30 includes a first power supply circuit 31, a second power supply circuit 32, and a switch 33. The first power supply circuit 31 includes a first battery 311 and a DC / DC converter 312. An input terminal of the DC / DC converter 312 is connected to the first battery 311. An output terminal of the DC / DC converter 312 may be configured to supply power to a BMS 314 of the first battery 311, a DC / DC converter controller 313, and one or more first loads 315. The second power supply circuit 32 includes a second battery 321. The second battery 321 is connected to the output terminal of the DC / DC converter 312 via the switch 33. The second battery 321 may be configured to supply power to the DC / DC converter controller 313 and one or more second loads 322. The first battery 311 may be a high-voltage battery and is configured to output high-voltage power. The DC / DC converter 312 is configured to convert the high-voltage power of the first battery 311 into low-voltage power. The second battery 321 may be a low-voltage battery and is configured to output low-voltage power.

[0049] Specifically, when the switch 33 is turned off, the switch 33 can interrupt the voltage signal communicated bidirectionally between the output end of the DC / DC converter 311 and the second battery 321. In this case, the output end of the DC / DC converter 312 can be configured to supply power to the BMS 314 of the first battery 311, the DC / DC converter controller 313, and one or more first loads 315. The second battery 321 can be configured to supply power to the DC / DC converter controller 313 and one or more second loads 322. For ease of understanding, in this embodiment of the present application, the power supply by the output end of the DC / DC converter 312 in the first power supply circuit 31 can be referred to as power supply A, and the power supply by the second battery 321 in the second power supply circuit 32 can be referred to as power supply B, with arrows indicating the current direction. Based on this, please refer to FIG. 3 for the current direction and power supply state in the current case.

[0050] It should be understood that the current direction and power supply state shown in FIG. 3 are merely examples. In practice, other power supply states and current directions are possible. In one example, when the switch 33 is turned on, the switch 33 can transmit a voltage signal that is communicated bidirectionally between the output end of the DC / DC converter 312 and the second battery 321. In this case, the output end of the DC / DC converter 312 can supply power to the BMS 314 of the first battery 311, the DC / DC converter controller 313, and one or more first loads 315, and can also supply power to the second battery 321, the DC / DC converter controller 313 connected to the second battery 321, and one or more second loads 322, which together correspond to power supply A. In another example, when the switch 33 is turned on and the circuit of the DC / DC converter 312 is disconnected due to a fault, the second battery 321 can supply power to one or more first loads 315 and one or more second loads 322, which corresponds to power supply B.

[0051] It should be understood that the switch 33 is configured to be turned on under normal conditions. If a fault occurs in the first power supply circuit 31 or the second power supply circuit 32, the switch 33 may be configured to switch from on to off. In this manner, when a fault occurs in either power supply circuit, the switch 33 is turned off to prevent the fault from affecting the normal operation of the low-voltage load in the other power supply circuit. In one example, if a fault occurs in the first power supply circuit 31, the switch 33 is turned off to electrically isolate the first power supply circuit 31 and the second power supply circuit 32. Because the second power supply circuit 32 includes a second battery 321, output can be maintained for power supply. As a result, the power supply of the entire second power supply circuit 32 is not affected. Referring to FIG. 4, FIG. 4 is an example diagram of the power supply of the second power supply circuit 32. In another example, if a fault occurs in the second power supply circuit 32, the switch 33 is turned off to electrically isolate the first power supply circuit 31 and the second power supply circuit 32. Because power is supplied to the BMS in the first power supply circuit 31 by the first power supply circuit 31, the BMS is not affected and the high-voltage output capability can be maintained. In addition, because the DC / DC converter controller 313 is connected to both the first power supply circuit 31 and the second power supply circuit 32, the controller 313 is not affected by either and the capability to convert high-voltage power to low-voltage power and output it can be maintained. As a result, the power supply of the entire first power supply circuit 31 is not affected. Referring to FIG. 5, FIG. 5 is an example diagram of the power supply of the first power supply circuit 31.

[0052] Based on the power supply circuit 30, when the first power supply circuit 31 cannot supply power to the BMS 314, the DC / DC converter 313, and the connected load due to a short-circuit fault and the switch 33 is turned off, the BMS 314 of the first battery 311 generally includes a built-in capacitor, which allows the BMS 314 to control the first battery 311 to output high-voltage power for a short period of time. In addition, the second power supply circuit 32 can supply power to the DC / DC converter controller 313, so that the DC / DC converter controller 313 controls the DC / DC converter 312 to convert the high-voltage power to low-voltage power, thereby maintaining the output of current and blowing a fuse at the location where the fault occurs, thereby restoring the power supply of the first power supply circuit 31. It should be understood that when the first power supply circuit 31 cannot supply power to the BMS 314, the DC / DC converter 313, and the connected load due to a short-circuit fault and the switch 33 is turned off, realizing current output in this manner can reduce circuit manufacturing costs compared to implementing current output by adding another battery to the first power supply circuit 31.

[0053] 6 , the switch 33 is configured to be on under normal conditions. When a short-circuit fault occurs in the third load 316 of the one or more first loads 315, the state of the switch 33 is configured to change from on to off, but the power supply of the entire second power supply circuit 32 is not affected. In addition, because the BMS 314 can control the first battery 311 to output high-voltage power for a short period of time, the second power supply circuit 32 can supply power to the DC / DC converter controller 313 to blow the fuse 318 connected to the third load 316 under the action of the BMS 314 and the DC / DC converter controller 313, thereby eliminating the short-circuit fault and thus restoring the power supply of the first power supply circuit 31. In this way, the reliability of the power supply circuit 30 can be improved.

[0054] Furthermore, the second battery 321 has a limited energy storage capacity and can only supply power for a short time. Therefore, after the fault is resolved, the switch 33 needs to be configured to be switched from off to on, so that the first power supply circuit 31 can charge the second battery 321 and supply power to the load in the second power supply circuit 31, preventing the second battery 321 from being insufficiently charged and affecting the operation of the associated load. In this way, the reliability of the power supply circuit 30 can be improved.

[0055] Optionally, as shown in Figure 6, the one or more first loads 315 and the one or more second loads 315 may both include a fourth load 317 to implement redundant power supply for the fourth load 317. In this way, the reliability of the power supply circuit 30 may be improved.

[0056] The fourth load 317 may be a relatively important load in a practical application scenario. For example, in the field of autonomous driving, the fourth load 317 may be an intelligent driving controller in an intelligent driving vehicle. A redundant power supply for the intelligent driving controller is implemented. As a result, when a fault occurs in one power supply circuit, the intelligent driving controller can still function, preventing the vehicle's intelligent driving from becoming uncontrollable and providing the user with enough time to take over. Alternatively, the fourth load 317 may be a controller for a device that plays an important role in normal driving, such as a steering device or a braking device. Another first load and another second load may be a device that has little impact on normal driving, such as an in-vehicle infotainment device.

[0057] There may be one controller 313 of the DC / DC converter, and both the first power supply circuit 31 and the second power supply circuit 32 supply power to the controller 313. In this case, a combined design may be performed in advance at the power supply locations of the first power supply circuit 31 and the second power supply circuit 32. Alternatively, there may be two controllers 313 of the DC / DC converter (i.e., a redundant configuration), and the first power supply circuit 31 and the second power supply circuit 32 supply power to two controllers 313, respectively.

[0058] There may be one fourth load 317, and both the first power supply circuit 31 and the second power supply circuit 32 supply power to the fourth load 317. In this case, combination design may be performed in advance at the power supply positions of the first power supply circuit 31 and the second power supply circuit 32. Alternatively, there may be two fourth loads 317 (i.e., a redundant configuration), and each of the first power supply circuit 31 and the second power supply circuit 32 supplies power to two fourth loads 317.

[0059] Optionally, the second power supply circuit 32 may alternatively be connected to the BMS 314 to implement redundant power supply for the BMS 314. Similarly, for the arrangement of the BMS 314, please refer to the arrangement of the fourth load 317 and the DC / DC converter controller 313. Details will not be described again. It should be noted that the complexity of the circuit design can be reduced when the second power supply circuit 32 is not connected to the BMS 314 compared to when the second power supply circuit 32 is connected to the BMS 314.

[0060] Optionally, whether a fault has occurred in the first power supply circuit 31 or the second power supply circuit 32 or whether the fault has been resolved may be determined by detecting the current or voltage of the first power supply circuit 31 and the second power supply circuit 32.

[0061] A connection in this application may be a direct electrical connection, an indirect electrical connection via another conductor or circuit element, or a connection via electromagnetic induction, which is not limited in this application.

[0062] The second battery 321 may be any device or component that can be configured to store and / or release electrical energy, such as a lead acid battery, a lithium ion battery, a nickel-metal hydride battery, a lithium polymer battery, a nickel-cadmium battery, or a supercapacitor.

[0063] The switch 33 may be an electronic switch, for example, a bidirectional (also called back-to-back) switching transistor. Specifically, the switching transistor may be a metal-oxide-semiconductor field-effect transistor (MOSFET), an insulated gate bipolar transistor (IGBT), or a bipolar junction transistor (BJT). Alternatively, the switch 33 may be a mechanical switch, for example, a relay or a contactor. Optionally, there may be one or more switches 33. This is not limited in the present application. Each switch 33 may include a first electrode, a second electrode, and a control electrode. The control electrode is configured to control the turning on or off of the switch 33. When the switch 33 is turned on, a current can be conducted between the first electrode and the second electrode of the switch 33. When the switch 33 is turned off, a current cannot be conducted between the first electrode and the second electrode of the switch 33.

[0064] Switch 33 may be an automatic protect switch (APS) to further improve the security and reliability of the battery circuit.

[0065] The low voltage in this embodiment of the present application may be a low voltage such as 12V, 24V, 36V, 48V, etc.

[0066] 7 is an example diagram of a control method for a power supply circuit according to an embodiment of the present application. The power supply circuit may be the aforementioned power supply circuit 30. The control method 700 includes steps S710 and S720. These steps are described below.

[0067] S710: Detect a fault condition in the first power supply circuit and the second power supply circuit.

[0068] In the operation process of the power supply circuit, whether a fault occurs in the first power supply circuit and the second power supply circuit can be detected in real time.

[0069] S720: Based on the detection result, the switch is controlled to be turned on or off.

[0070] If a short-circuit fault is detected in a third load of the one or more first loads, the switch is controlled to be turned off, and a fuse connected to the third load is blown under the action of the BMS and the controller of the DC / DC converter to eliminate the short-circuit fault.

[0071] As shown in FIG. 8, when a fault occurs in the first power supply circuit or the second power supply circuit (i.e., step S810), the switch is controlled to be turned off (i.e., step S820), and thus the first power supply circuit and the second power supply circuit are separated (i.e., step S830) and supply power separately.

[0072] As shown in FIG. 9, when the faults in the first power supply circuit and the second power supply circuit are eliminated (i.e., step S910), the switch is controlled to be turned on (i.e., step S920), i.e., the switch is switched on, and thus the first power supply circuit and the second power supply circuit are connected to implement a shared power supply (i.e., step S930).

[0073] According to the control method provided in this embodiment of the present application, when a fault occurs in one of the power supply circuits, the switch can be controlled to be turned off to prevent the fault in the power supply circuit from affecting the normal operation of the low-voltage load in the other power supply circuit. In addition, when the fault is eliminated or there is no fault, the switch can be controlled to be turned on to prevent the second battery from being undercharged and affecting the operation of the associated load. In this way, the reliability of the power supply circuit can be improved.

[0074] 10 is an example diagram of a control device for a power supply circuit according to an embodiment of the present application. As shown in FIG. 10, the control device 1000 includes a detection module 1010 and a processing module 1020. The detection module 1010 is configured to perform step S710, and the processing module 1020 is configured to perform step S720.

[0075] 11 is a block diagram illustrating an example of a hardware structure of a control device for a power supply circuit according to an embodiment of the present application. Optionally, the device 1100 may specifically be a computer device. The device 1100 includes a memory 1110, a processor 1120, and a communication interface 1130. The memory 1110, the processor 1120, and the communication interface 1130 are communicatively connected to each other via a bus.

[0076] The memory 1110 may be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1110 can store a program. When the program stored in the memory 1110 is executed by the processor 1120, the processor 1120 is configured to perform steps of the control method in the embodiment of the present application.

[0077] The processor 1120 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), a graphics processing unit (GPU), or one or more integrated circuits, and is configured to execute associated programs to implement the control methods in the method embodiments of the present application.

[0078] Alternatively, the processor 1120 may be an integrated circuit chip and have signal processing capabilities. In the implementation process, the control method in the present application may be completed by using an integrated logic circuit of hardware in the processor 1120 or instructions in the form of software.

[0079] Alternatively, the aforementioned processor 1120 may be a general-purpose processor, a digital signal processor (DSP), an ASIC, a field programmable gate array (FPGA) or another programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc. Each step of the method disclosed with reference to the embodiments of the present application may be performed and completed directly by a hardware decoding processor, or may be performed and completed by using a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium well-known in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, or a register. The storage medium is located in the memory 1110. The processor 1120 reads the information in the memory 1110 and, in combination with the hardware of the processor 1120, completes the functions that need to be performed by the modules included in the apparatus in the embodiments of the present application or executes the control method in the method embodiments of the present application.

[0080] The communication interface 1130 uses a transceiver device, such as, but not limited to, a transceiver, to implement communications between the device 1100 and another device or a communications network.

[0081] An embodiment of the present application further provides a computer-readable storage medium containing instructions, which, when executed on a computer, enable the computer to perform the aforementioned control method.

[0082] An embodiment of the present application further provides a computer program product comprising instructions, which, when executed on a computer, enable the computer to perform the aforementioned control method.

[0083] An embodiment of the present application further provides a computing device including at least one processor and a memory, wherein the at least one processor is coupled to the memory and configured to read and execute instructions in the memory to perform the aforementioned control method.

[0084] An embodiment of the present application further provides a chip, which includes a processor and a data interface, and the processor reads instructions stored in the memory via the data interface to execute the above-mentioned control method.

[0085] Optionally, in one embodiment, the chip may further include a memory, the memory storing instructions, and the processor configured to execute the instructions stored in the memory, which, when executed, configures the processor to perform the control method described above.

[0086] An embodiment of the present application further provides an electronic device including any power supply circuit provided in an embodiment of the present application.

[0087] An embodiment of the present application further provides a vehicle including any of the power supply circuits provided in the embodiments of the present application, wherein optionally, the one or more first loads and the one or more second loads each include an intelligent driving controller.

[0088] Those skilled in the art may recognize that, in combination with the examples described in the embodiments disclosed herein, the units and algorithm steps may be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether a function is performed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use various methods to implement the above-described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0089] For the sake of convenient and concise description, the detailed operation processes of the aforementioned systems, devices, and units refer to the corresponding processes in the aforementioned method embodiments, which can be clearly understood by those skilled in the art, and the details will not be described again in this specification.

[0090] In some embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the described device embodiment is merely an example. For example, the division into units is merely a division of logical functions, and other divisions may be used in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some functions may be omitted or not performed. In addition, the shown or discussed mutual or direct couplings or communication connections may be implemented via some interfaces. Indirect couplings or communication connections between devices or units may be implemented in electrical, mechanical, or other forms.

[0091] The units described as separate parts may or may not be physically separate, and the parts shown as units may or may not be physical units, and may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual requirements to achieve the objectives of the solutions of the embodiments.

[0092] In addition, the functional units in the embodiments of the present application may be integrated into one processing unit, each of the units may exist physically alone, or two or more units may be integrated into one unit.

[0093] When a function is implemented in the form of a software functional unit and sold or used as an independent product, the function may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may essentially be implemented, or a portion contributing to the prior art may be implemented, or some of the technical solutions may be implemented in the form of a software product. The computer software product is stored in a storage medium and includes some instructions for instructing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage medium includes any medium capable of storing program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0094] The above description is merely a specific implementation form of the present application and is not intended to limit the scope of protection of the present application. Any variations or replacements that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application shall fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims. [Explanation of symbols]

[0095] 10 Traditional Architecture 11 First Battery 12 Second Battery 13 Motor 14 wheels 15 Direct Current / Direct Current (DC / DC) Converter 16 Low voltage load 17 Charging circuit 20 Power supply circuit 21 First power supply circuit 22 Second power supply circuit 23 Switch 30 Power supply circuit 31 First power supply circuit 32 Second power supply circuit 33 Switch 211 First Battery 212 DC / DC converter 213 First Load 221 Second Battery 222 Second Load 311 First Battery 312 DC / DC Converter 313 Controller 314 Battery Management System (BMS) 315 First Load 316 The Third Load 317 The Fourth Load 318 Hughes 321 Second Battery 322 Second Load 700 Control Method 1000 control device 1010 Detection Module 1020 Processing Module 1100 equipment 1110 memory 1120 processor 1130 Communication Interface

Claims

1. a first power supply circuit comprising a first battery and a direct current / direct current (DC / DC) converter, an input of the DC / DC converter connected to the first battery and an output of the DC / DC converter configured to supply power to a battery management system (BMS) of the first battery, a controller of the DC / DC converter, and one or more first loads; a second power supply circuit including a second battery, the second battery being connected to the output of the DC / DC converter via a switch, the second battery being configured to supply power to the controller of the DC / DC converter and one or more second loads; A power supply circuit comprising:

2. 2. The power supply circuit of claim 1, wherein the switch is configured to be on in a normal state, and the switch is configured to be switched from on to off when a short-circuit fault occurs in a third load of the one or more first loads.

3. 3. The power supply circuit of claim 2, wherein the first power supply circuit is configured to, when the short-circuit fault occurs in the third load of the one or more first loads, blow a fuse connected to the third load under the action of the BMS and the controller of the DC / DC converter.

4. 2. The power supply circuit of claim 1, wherein the switch is configured to be on in a normal state, to be switched from on to off when a fault occurs in the first power supply circuit or the second power supply circuit, and to be switched from off to on when the fault is eliminated.

5. 5. The power supply circuit of claim 4, wherein detecting a current or a voltage in the first power supply circuit and the second power supply circuit determines whether the fault has occurred in the first power supply circuit or the second power supply circuit or whether the fault has been resolved in the first power supply circuit or the second power supply circuit.

6. 6. The power supply circuit of claim 1, wherein the one or more first loads and the one or more second loads together comprise a fourth load.

7. A control method for a power supply circuit, the power supply circuit comprising: a first power supply circuit and a second power supply circuit; the first power supply circuit comprising a first battery and a direct current / direct current (DC / DC) converter, an input terminal of the DC / DC converter connected to the first battery, an output terminal of the DC / DC converter configured to supply power to a battery management system (BMS) of the first battery, a controller of the DC / DC converter, and one or more first loads; the second power supply circuit comprising a second battery, the second battery connected to the output terminal of the DC / DC converter via a switch, and the second battery configured to supply power to the controller of the DC / DC converter and one or more second loads; the control method comprising: detecting a fault condition in the first power supply circuit and the second power supply circuit; controlling the switch to be turned on or off based on the detection result; A control method comprising:

8. The step of controlling the switch to be turned on or off based on the detection result includes: controlling the switch to be turned off when a short-circuit fault is detected in a third load of the one or more first loads, wherein a fuse connected to the third load is blown under the action of the BMS and the controller of the DC / DC converter; The control method of claim 7, comprising:

9. The step of controlling the switch to be turned on or off based on the detection result includes: controlling the switch to be turned off when a fault occurs in the first power supply circuit or the second power supply circuit; or controlling the switch to be turned on when the faults in the first power supply circuit and the second power supply circuit are eliminated; The control method of claim 7, comprising:

10. A control device for a power supply circuit, comprising a module configured to carry out the control method according to any one of claims 7 to 9.

11. A computer-readable storage medium storing computer instructions that, when executed on a computer, implement the control method of any one of claims 7 to 9.

12. An electronic device comprising a power supply circuit according to any one of claims 1 to 6.

13. A vehicle comprising the power supply circuit according to any one of claims 1 to 6.

14. 14. The control method of claim 13, wherein the one or more first loads and the one or more second loads each include an intelligent driving controller.

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