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

Abstract

Embodiments of the present application provide a power supply circuit and a control method thereof, an electronic device and a vehicle, which can be applied to the fields of intelligent driving, smart home, industrial remote control and the like. The power supply circuit comprises a first power supply circuit and a second power supply circuit. The first power supply circuit comprises a first battery and a DC / DC converter. An input end of the DC / DC converter is connected to the first battery. An output end of the DC / DC converter is used to supply power to a BMS of the first battery, a controller of the DC / DC converter and one or more first loads. The second power supply circuit comprises a second battery. The second battery is connected to the output end of the DC / DC converter through a switch. The second battery is used to supply power to the controller of the DC / DC converter and one or more second loads. The present application can improve the reliability of the power supply circuit.

Description

Technical Field

[0001] This application relates to the field of electrical and electronic engineering, and more specifically, to a power supply circuit, electronic equipment, and vehicle. Background Technology

[0002] With the increasing advancement of intelligent driving technology, the demand for low-voltage (12, 24, 36, or 48V, etc.) power supply is also growing. For example, vehicle loads such as in-vehicle entertainment systems, in-vehicle navigation systems, and intelligent driving controllers all require low-voltage power supply.

[0003] Traditional solutions typically employ two power supply circuits to power the vehicle's low-voltage loads, connected by a switch. The first circuit includes a DC / DC converter to convert the high-voltage output from a first battery (e.g., a high-voltage battery) into low-voltage electricity to power one or more low-voltage loads. The second circuit includes a second battery (e.g., a low-voltage storage battery), also used to power one or more low-voltage loads. In practice, if any voltage or current anomaly is detected in either circuit, the switch is disconnected to avoid affecting the normal operation of the other low-voltage load. However, if a short circuit occurs in the first power supply circuit and the switch is disconnected, the circuit will be completely paralyzed because there is no output current from the second battery, severely impacting the reliability of the power supply circuit.

[0004] Therefore, improving the reliability of power supply circuits is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] This application provides a power supply circuit and its control method, electronic equipment, and vehicle, which can improve the reliability of the power supply circuit.

[0006] In a first aspect, a power supply circuit is provided, comprising: a first power supply circuit including a first battery and a DC / DC converter, wherein the input terminal of the DC / DC converter is connected to the first battery, and the output terminal of the DC / DC converter is used 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 terminal of the DC / DC converter via a switch, and the second battery is used to supply power to the controller of the DC / DC converter and one or more second loads.

[0007] The first battery can be a high-voltage battery for outputting high-voltage electricity; the DC / DC converter is used to convert the high-voltage electricity from the first battery into low-voltage electricity; the second battery can be a low-voltage storage battery for outputting low-voltage electricity.

[0008] Optionally, the second power supply circuit can also be connected to the BMS to achieve redundant power supply to the BMS.

[0009] Based on this power supply circuit, when the first power supply circuit fails to supply power to the BMS, DC / DC converter, and other loads due to a short circuit fault and the switch is open, the BMS of the first battery typically includes a built-in capacitor, which allows the BMS to temporarily control the first battery to output high voltage. At the same time, since the second power supply circuit can supply power to the controller of the DC / DC converter, the controller of the DC / DC converter can control the DC / DC converter to achieve the conversion of high voltage to low voltage, maintain the current output, and blow the fuse at the fault location to restore the power supply of the first power supply circuit.

[0010] The power supply circuit provided in this application embodiment 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 terminal of the DC / DC converter supplies power to the BMS of the first battery, the controller of the DC / DC converter, and a first load. The second power supply circuit includes a second battery, which supplies power to the controller of the DC / DC converter and a second load. The second battery is connected to the output terminal of the DC / DC converter via a switch. This allows for several improvements. First, if one voltage or current is abnormal, the switch can be disconnected to prevent the fault in that circuit from affecting the normal operation of the other low-voltage load. Second, since the BMS of the first battery in the first power supply circuit is powered through the first power supply circuit, and the controller of the DC / DC converter is powered through both the first and second power supply circuits, a short-circuit fault in the first power supply circuit allows the output current of the DC / DC converter to be controlled under the action of the BMS and the controller, thereby restoring power to the first power supply circuit and improving its reliability.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the switch is configured to be normally on, and if a short-circuit fault occurs in the 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 switch from on to off, since the BMS can briefly control the first battery to output high voltage, 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 to low voltage, maintain the current output, and blow the fuse connected to the third load, thereby eliminating the short circuit fault and prompting the power supply of the first power supply circuit to be restored, thus improving the reliability of the power supply circuit.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the first power supply circuit is configured such that if a short-circuit fault occurs in the third load of the one or more first loads, the fuse connected to the third load blows under the action of the controller of the BMS and the DC / DC converter. This eliminates the short-circuit fault, restores power supply to the first power supply circuit, and thus improves the reliability of the power supply circuit.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the switch is configured to be on under normal conditions, and if a fault occurs in the first power supply circuit or the second power supply circuit, the switch is configured to switch from being on to being off; if the fault is eliminated, the switch is configured to switch from being off to being on.

[0015] Since the second battery has limited energy storage and can only provide power for a short time, after the fault is cleared, the switch needs to be switched from open to open so that the first power supply circuit can charge the second battery and supply power to the load on the second power supply circuit.

[0016] The power supply circuit provided in this application embodiment is configured to be on under normal conditions. When a fault occurs in any one path, the switch is turned off to prevent the fault in one path from affecting the normal operation of the low-voltage load in another path. If the fault is eliminated, the switch is switched from off to on to prevent the operation of the relevant load from being affected after the power of the second battery is depleted, thereby improving the reliability of the power supply circuit.

[0017] In conjunction with the first aspect, in some implementations of the first aspect, the fault of the first power supply circuit or the second power supply circuit is determined by detecting the current or voltage of the first power supply circuit and the second power supply circuit, or by determining whether the fault has been eliminated.

[0018] In conjunction with the first aspect, in some implementations of the first aspect, both the one or more first loads and the one or more second loads include a fourth load.

[0019] In the embodiments of this application, the one or more first loads and the one or more second loads all include a fourth load, so that when one power supply circuit fails, the other can still supply power to the fourth load, realizing redundant power supply to the fourth load, thereby improving the reliability of the power supply circuit.

[0020] Optionally, the fourth load can be a more critical load. For example, in the field of autonomous driving, the fourth load can be the intelligent driving controller in an intelligent driving vehicle, to achieve redundant power supply for the intelligent driving controller, so that the intelligent driving controller can still work when one power supply circuit fails, preventing the intelligent driving of the whole vehicle from going out of control and giving the user enough time to take over.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, the switch is an intelligent protection switch.

[0022] Secondly, a control method for a power supply circuit is provided. 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 the DC / DC converter is connected to the first battery, and the output terminal of the DC / DC converter is used to supply power to the BMS of the first battery, the controller of the DC / DC converter, and one or more first loads. The second power supply circuit includes a second battery, which is connected to the output terminal of the DC / DC converter via a switch. The second battery is used to supply power to the controller of the DC / DC converter and one or more second loads. The control method includes: detecting fault conditions in the first power supply circuit and the second power supply circuit; and controlling the switch to be turned on or off based on the detection result.

[0023] Based on the control method provided in the embodiments of this application, the switching on or off can be controlled according to the fault conditions of the first power supply circuit and the second power supply circuit, thereby improving the reliability of the power supply circuit.

[0024] In conjunction with the second aspect, in some implementations of the second aspect, controlling the switching on or off based on the detection result includes: if a short-circuit fault is detected in a third load among the one or more first loads, controlling the switching off, and the fuse connected to the third load blows under the action of the controller of the BMS and the DC / DC converter, thereby eliminating the short-circuit fault.

[0025] Based on the control method provided in the embodiments of this application, when a short-circuit fault is detected in a third load among one or more first loads, the switch can be controlled to disconnect to prevent the fault in that circuit from affecting the normal operation of another low-voltage load.

[0026] In conjunction with the second aspect, in some implementations of the second aspect, controlling the switch to be turned on or off based on the detection result includes: if a fault occurs in the first power supply circuit or the second power supply circuit, controlling the switch to be turned off; or, if the fault in the first power supply circuit and the second power supply circuit is eliminated, controlling the switch to be turned on.

[0027] Based on the control method provided in the embodiments of this application, the switch can be turned off when any power supply circuit fails, so as to avoid the fault of that circuit affecting the normal operation of another low-voltage load; or the switch can be turned on when the fault is eliminated or there is no fault, so as to prevent the operation of related loads from being affected after the power of the second battery is depleted, thereby improving the reliability of the power supply circuit.

[0028] Thirdly, a control device for a power supply circuit is provided, including a module for performing a control method as described in the second aspect or any possible implementation thereof.

[0029] Fourthly, a control device for a power supply circuit is provided, comprising at least one processor, the at least one processor being coupled to a memory to read and execute instructions in the memory to implement the control method as described in the second aspect or any possible implementation thereof.

[0030] Fifthly, a computer-readable storage medium is provided, characterized in that the computer-readable storage medium stores computer instructions that, when executed on a computer, implement the control method as described in the second aspect or any possible implementation thereof.

[0031] In a sixth aspect, a computer program product is provided, comprising instructions that, when executed on a computer, execute the control method as described in the second aspect or any possible implementation thereof.

[0032] A seventh aspect provides a computing device comprising: at least one processor and a memory, the at least one processor being coupled to the memory for reading and executing instructions in the memory to perform a control method as described in the second aspect or any possible implementation thereof.

[0033] Eighthly, a chip is provided, the chip including a processor and a data interface, the processor reading instructions stored in a memory through the data interface to execute a control method as described in the second aspect or any possible implementation thereof.

[0034] Optionally, as one implementation, the chip may further include a memory storing instructions, and the processor is configured to execute the instructions stored in the memory. When the instructions are executed, the processor is configured to perform a control method as described in the second aspect or any possible implementation thereof.

[0035] A ninth aspect provides an electronic device characterized by including a power supply circuit as in the first aspect or any possible implementation thereof.

[0036] In a tenth aspect, a vehicle is provided, characterized in that it includes a power supply circuit as in the first aspect or any possible implementation thereof.

[0037] In conjunction with the tenth aspect, in some implementations of the tenth aspect, both the one or more first loads and the one or more second loads include an intelligent driving controller. Attached Figure Description

[0038] Figure 1 This is an example diagram of a traditional vehicle architecture.

[0039] Figure 2 This is an example diagram of a traditional power supply circuit.

[0040] Figure 3 This is an example diagram of a power supply circuit provided in an embodiment of this application.

[0041] Figure 4 This is a power supply example diagram of a second power supply circuit under fault conditions provided in an embodiment of this application.

[0042] Figure 5 This is a power supply example diagram of the first power supply circuit under another fault condition provided in the embodiments of this application.

[0043] Figure 6 This is an example diagram of another power supply circuit provided in the embodiments of this application.

[0044] Figure 7 This is an example diagram of a power supply circuit control method provided in an embodiment of this application.

[0045] Figure 8 This is an example diagram of a fault control method provided in an embodiment of this application.

[0046] Figure 9 This is an example diagram of a fault elimination control method provided in an embodiment of this application.

[0047] Figure 10 This is an example diagram of a control device for a power supply circuit provided in an embodiment of this application.

[0048] Figure 11 This is an exemplary block diagram of the hardware structure of a control device for a power supply circuit provided in an embodiment of this application. Detailed Implementation

[0049] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0050] This application can be applied to mobile carriers, which can include road vehicles, water vehicles, air vehicles, industrial equipment, agricultural equipment, or entertainment equipment. For example, a mobile carrier can be a vehicle, which is a vehicle in a broad sense, including transportation vehicles (such as commercial vehicles, passenger cars, motorcycles, flying cars, trains, etc.), industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), agricultural equipment (such as lawnmowers, harvesters, etc.), amusement equipment, toy vehicles, etc. This application does not specifically limit the type of vehicle. Furthermore, a mobile carrier can be an airplane or a ship.

[0051] This solution can also be applied to fields such as intelligent driving, smart homes, and industrial remote control.

[0052] For ease of understanding, the following uses an application to vehicles as an example to briefly introduce the background technology involved in the embodiments of this application.

[0053] Figure 1 This is an example diagram of a traditional vehicle architecture. The vehicle can be a pure electric vehicle, a hybrid electric vehicle, or other new energy vehicle. Figure 1 As shown, 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, and a charging circuit 17. The second battery 12 can be a low-voltage storage battery, which can supply power to the low-voltage load 16 before the vehicle starts, and simultaneously wake up the DC / DC converter 15. The first battery 11 can be a high-voltage battery, used to drive the motor 13 after the vehicle starts, which in turn drives the wheels 14 to rotate, thus enabling vehicle movement. Furthermore, the first battery 11 is also used to convert high-voltage electricity to low-voltage electricity via the DC / DC converter 15 to supply power to the low-voltage load 16 and to replenish the second battery 12. The charging circuit 17 is used to connect to an external charging station or mobile charging device to charge the first battery 11, or to connect to an external load (e.g., another vehicle) to provide the electrical energy from the first battery 11 to the external load. The low-voltage load 16 can include vehicle loads such as in-vehicle entertainment systems, in-vehicle navigation systems, and intelligent driving controllers.

[0054] In the power supply circuit provided by the conventional architecture 10, the DC / DC converter 15, the second battery 12, and the low-voltage load 16 are directly connected. The power supply to all low-voltage loads 16 in the vehicle is combined. If any branch fails, all loads in the vehicle will be affected. For example, if a short circuit fault occurs in a low-voltage load 16, although the fuse can be blown by the second battery 12, due to its hysteresis (e.g., there may be a 1-second delay in blowing), the vehicle voltage will still drop, leading to loss of vehicle control.

[0055] To improve the reliability of the power supply circuit, traditional solutions also provide a power supply circuit, such as... Figure 2 As shown, 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 of the DC / DC converter 212 is connected to the first battery 211, and its output can be used to power a first load 213 in the vehicle. The second power supply circuit 22 includes a second battery 221, which is connected to the output of the DC / DC converter 212 via a switch 23. This second battery 221 can be used to power a second load 222. The power supply for the first load 213 and the second load 222 can include the same important load (e.g., an intelligent driving controller). In actual operation, if any voltage or current abnormality is detected, the switch is disconnected to avoid affecting the normal operation of the other low-voltage load; the switch is then turned on again after the fault is cleared.

[0056] However, based on this power supply circuit 20, if the first power supply circuit 21 experiences a short circuit fault and the switch is turned off, the fuse cannot blow because there is no second battery 221 to provide output current for that circuit. This will cause the entire circuit to be paralyzed and unable to eliminate the fault on its own, which seriously affects the reliability of the power supply circuit.

[0057] Based on this, this application provides a power supply circuit. In addition to the conventional power supply circuit 20, the output terminal of the DC / DC converter in the first power supply circuit supplies power to the battery management system (BMS) of the first battery and the controller of the DC / DC converter. The second battery in the second power supply circuit supplies power to the controller of the DC / DC converter. In the event of a short circuit fault in the first power supply circuit, the output current of the DC / DC converter can be controlled under the action of the BMS and the controller of the DC / DC converter, thereby restoring the power supply of the first power supply circuit and improving the reliability of the power supply circuit.

[0058] Figure 3 This is an example diagram of a power supply circuit provided in an embodiment of this application. For example... Figure 3As shown, 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. The input of the DC / DC converter 312 is connected to the first battery 311, and its output can power the BMS 314 of the first battery 311, the controller 313 of the DC / DC converter, and one or more first loads 315. The second power supply circuit 32 includes a second battery 321, which is connected to the output of the DC / DC converter 312 via the switch 33. The second battery 321 can power the controller 313 of the DC / DC converter and one or more second loads 322. The first battery 311 can be a high-voltage battery for outputting high-voltage electricity; the DC / DC converter 312 converts the high-voltage electricity from the first battery 311 to low-voltage electricity; and the second battery 321 can be a low-voltage storage battery for outputting low-voltage electricity.

[0059] Specifically, when switch 33 is open, switch 33 can block the bidirectional voltage signal flow between the output of DC / DC converter 311 and the second battery 321. In this case, the output of DC / DC converter 312 can be used to power the BMS 314 of the first battery 311, the controller 313 of the DC / DC converter, and one or more first loads 315, while the second battery 321 can be used to power the controller 313 of the DC / DC converter and one or more second loads 322. For ease of understanding, in this embodiment, the power supply to the output of DC / DC converter 312 in the first power supply circuit 31 can be denoted as power supply A, and the power supply to the second battery 321 in the second power supply circuit 32 can be denoted as power supply B, with arrows indicating the direction of current flow. Based on this, the current flow and power supply situation in the current case can be found in [reference needed]. Figure 3 .

[0060] It needs to be understood that, Figure 3The current flow and power supply conditions shown are merely examples; other power supply conditions and current flows are possible in practice. As an example, when switch 33 is on, it connects the output of DC / DC converter 312 and the second battery 321, allowing a bidirectional voltage signal to flow between them. In this case, the output of DC / DC converter 312 can supply power to the BMS 314 of the first battery 311, the controller 313 of the DC / DC converter, and one or more first loads 315, while also supplying power to the second battery 321, the controller 313 of the DC / DC converter connected to the second battery 321, and one or more second loads 322—corresponding to power supply A. As another example, when switch 33 is on and the circuit of 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—corresponding to power supply B.

[0061] It should be understood that switch 33 is configured to be on under normal conditions. If either the first power supply circuit 31 or the second power supply circuit 32 fails, switch 33 can be configured to switch from on to off, so that if either circuit fails, switching 33 can be disconnected to prevent the failure of one circuit from affecting the normal operation of the other low-voltage load. As an example, if the first power supply circuit 31 fails, disconnecting switch 33 achieves electrical decoupling between the first power supply circuit 31 and the second power supply circuit 32. Since the second power supply circuit 32 includes the second battery 321, the output power supply can be maintained, ensuring that the power supply of the entire second power supply circuit 32 is unaffected. See [link to relevant documentation]. Figure 4 The diagram shows an example of the power supply of the second power supply circuit 32. As another example, if the second power supply circuit 32 malfunctions, the switch 33 is disconnected, achieving electrical decoupling between the first power supply circuit 31 and the second power supply circuit 32. Since the BMS in the first power supply circuit 31 is powered by the first power supply circuit 31, it is unaffected and can maintain its high-voltage output capability. Furthermore, the controller 313 of the DC / DC converter is connected to both the first and second power supply circuits 31 and 32, and is therefore also unaffected, maintaining its high-voltage to low-voltage conversion output capability. Therefore, the power supply of the entire first power supply circuit 31 is unaffected. See [link to relevant documentation]. Figure 5 The diagram shows an example of the power supply for the first power supply circuit 31.

[0062] Based on power supply circuit 30, when the first power supply circuit 31 fails to supply power to BMS 314, DC / DC converter 313, and connected load due to a short circuit fault and switch 33 is open, the BMS 314 of the first battery 311 typically includes a built-in capacitor, which allows BMS 314 to temporarily control the first battery 311 to output high voltage. Simultaneously, since the second power supply circuit 32 can supply power to the controller 313 of the DC / DC converter, the controller 313 can control the DC / DC converter 312 to convert high voltage to low voltage, maintaining current output and blowing the fuse at the fault location to restore power supply to the first power supply circuit 31. It should be understood that when the first power supply circuit 31 fails to supply power to BMS 314, DC / DC converter 313, and connected load due to a short circuit fault and switch 33 is open, using this method to achieve current output reduces circuit manufacturing costs compared to adding other batteries to the first power supply circuit 31 to achieve current output.

[0063] For example, such as Figure 6 As shown, switch 33 is configured to be on under normal conditions. If a short circuit fault occurs in the third load 316 of one or more first loads 315, the state of switch 33 is configured to switch from on to off, and the power supply of the entire second power supply circuit 32 is not affected. In addition, since BMS 314 can briefly control the first battery 311 to output high voltage, the second power supply circuit 32 can supply power to the controller 313 of the DC / DC converter. This causes the fuse 318 connected to the third load 316 to blow under the action of BMS 314 and the controller 313 of the DC / DC converter, eliminating the short circuit fault and restoring the power supply of the first power supply circuit 31, thereby improving the reliability of the power supply circuit 30.

[0064] In addition, since the second battery 321 has limited energy storage and can only provide power for a short time, after the fault is cleared, the switch 33 needs to be configured to switch from open to closed so that the first power supply circuit 31 can replenish the second battery 321 and supply power to the load on the second power supply circuit 31. This is to prevent the operation of the relevant load from being affected after the second battery 321 is depleted, thereby improving the reliability of the power supply circuit 30.

[0065] Optionally, such as Figure 6 As shown, one or more first loads 315 and one or more second loads 315 may each include a fourth load 317 to achieve redundant power supply for the fourth load 317, thereby improving the reliability of the power supply circuit 30.

[0066] The fourth load 317 can be a relatively important load in practical application scenarios. For example, in the field of autonomous driving, the fourth load 317 can be the intelligent driving controller in an intelligent driving vehicle to achieve redundant power supply for the intelligent driving controller. This ensures that the intelligent driving controller can still operate even if one power supply circuit fails, preventing the intelligent driving of the entire vehicle from going out of control and giving the user sufficient time to take over. The fourth load 317 can also be the controller of equipment that plays a key role in normal driving, such as steering and braking. The other first and second loads can be equipment that has little impact on normal driving, such as in-vehicle entertainment equipment.

[0067] The DC / DC converter can have one controller 313, with the first power supply circuit 31 and the second power supply circuit 32 jointly powering the controller 313. In this case, a circuit combining design can be pre-designed at the power supply points of the first power supply circuit 31 and the second power supply circuit 32. Alternatively, the DC / DC converter can have two controllers 313 (i.e., redundant setup), with the first power supply circuit 31 and the second power supply circuit 32 powering the two controllers 313 respectively.

[0068] The number of fourth loads 317 can be one, with the first power supply circuit 31 and the second power supply circuit 32 jointly supplying power to the fourth load 317. In this case, a circuit combining design can be made in advance at the power supply points of the first power supply circuit 31 and the second power supply circuit 32. Alternatively, the number of fourth loads 317 can also be two (i.e., redundant setting), with the first power supply circuit 31 and the second power supply circuit 32 supplying power to the two fourth loads 317 respectively.

[0069] Optionally, the second power supply circuit 32 can also be connected to the BMS 314 to achieve redundant power supply for the BMS 314. Similarly, the configuration of the BMS 314 can refer to the configuration of the fourth load 317 and the controller 313 of the DC / DC converter, and will not be repeated here. It should be noted that not connecting the second power supply circuit 32 to the BMS 314 reduces the complexity of the circuit design compared to connecting the BMS 314.

[0070] Optionally, it can be determined whether the first power supply circuit 31 or the second power supply circuit 32 has a fault or whether the fault has been eliminated by detecting the current or voltage of the first power supply circuit 31 and the second power supply circuit 32.

[0071] The connections involved in this application can be direct electrical connections, indirect electrical connections through other conductors or circuit elements, or connections generated through electromagnetic induction; this application does not limit the scope of these connections.

[0072] The second battery 321 can be any device or apparatus that can be used to store and / or release electrical energy, such as a lead-acid battery, lithium-ion battery, nickel-metal hydride battery, lithium polymer battery, nickel-cadmium battery, or supercapacitor.

[0073] Switch 33 can be an electronic switch, such as a bidirectional (also known as a counter-rotating) switching transistor, specifically a metal-oxide-semiconductor field-effect transistor (MOSFET), an insulated-gate bipolar transistor (IGBT), or a bipolar junction transistor (BJT). Switch 33 can also be a mechanical switch, such as a relay or contactor. Optionally, there can be one or more switches 33; this application does not limit this. Each switch 33 may include a first electrode, a second electrode, and a control electrode, wherein the control electrode is used to control the switching of switch 33 to be on or off. When switch 33 is on, current can be transmitted between the first and second electrodes of switch 33; when switch 33 is off, no current can be transmitted between the first and second electrodes of switch 33.

[0074] Switch 33 can be an automatic protect switch (APS), thereby further improving the safety and reliability of the battery circuit.

[0075] The low voltage involved in the embodiments of this application can be 12, 24, 36, 48V, etc.

[0076] Figure 7 This is an example diagram of a control method for a power supply circuit provided in an embodiment of this application. The power supply circuit can be the aforementioned power supply circuit 30. The control method 700 includes steps S710 and S720, which are described below.

[0077] S710 detects faults in the first and second power supply circuits.

[0078] It can detect whether the first power supply circuit and the second power supply circuit are faulty in real time during the operation of the power supply circuit.

[0079] S720 controls the switching on or off based on the detection results.

[0080] If a short circuit fault is detected in the third load of one or more first loads, the control disconnect switch is activated, and the fuse connected to the third load blows under the action of the BMS and the controller of the DC / DC converter, thus eliminating the short circuit fault.

[0081] like Figure 8 As shown, if the first power supply circuit or the second power supply circuit fails (i.e., step S810), the control disconnect switch is activated (i.e., step S820), causing the first power supply circuit and the second power supply circuit to decouple (i.e., step S830), and power is supplied independently.

[0082] like Figure 9 As shown, if the faults in the first power supply circuit and the second power supply circuit are eliminated (i.e., step S910), the control switch is turned on (i.e., step S920), that is, the switch is closed, so that the first power supply circuit and the second power supply circuit are turned on (i.e., step S930), and common power supply is realized.

[0083] Based on the control method provided in the embodiments of this application, the switch can be turned off when any power supply circuit fails, so as to avoid the fault of that circuit affecting the normal operation of another low-voltage load; or the switch can be turned on when the fault is eliminated or there is no fault, so as to prevent the operation of related loads from being affected after the power of the second battery is depleted, thereby improving the reliability of the power supply circuit.

[0084] Figure 10 This is an example diagram of a control device for a power supply circuit provided in an embodiment of this application. For example... Figure 10 As shown, the control device 1000 includes a detection module 1010 and a processing module 1020. The detection module 1010 is used to perform the above-described step S710, and the processing module 1020 is used to perform the above-described step S720.

[0085] Figure 11 This is an exemplary block diagram of the hardware structure of a control device for a power supply circuit provided in an embodiment of this 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 interconnected via a bus.

[0086] 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 may store a program, and when the program stored in the memory 1110 is executed by the processor 1120, the processor 1120 is used to execute the various steps of the control method of the embodiments of this application.

[0087] 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, used to execute relevant programs to implement the control method of the embodiments of this application.

[0088] The processor 1120 can also be an integrated circuit chip with signal processing capabilities. In implementation, the control method of this application can be accomplished through integrated logic circuits in the processor 1120 or through software instructions.

[0089] The processor 1120 described above can also be a general-purpose processor, a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 1110. The processor 1120 reads the information in memory 1110 and, in conjunction with its hardware, completes the functions required by the modules included in the apparatus of the embodiments of this application, or executes the control methods of the method embodiments of this application.

[0090] The communication interface 1130 uses a transceiver device, such as, but not limited to, a transceiver, to enable communication between the device 1100 and other devices or communication networks.

[0091] This application also provides a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the control method described above.

[0092] This application also provides a computer program product containing instructions that, when executed on a computer, implement the aforementioned control method.

[0093] This application also provides a computing device, including: at least one processor and a memory, wherein the at least one processor is coupled to the memory and is used to read and execute instructions in the memory to perform the above-described control method.

[0094] This application also provides a chip, which includes a processor and a data interface. The processor reads instructions stored in the memory through the data interface and executes the above-described control method.

[0095] Optionally, as one implementation, the chip may further include a memory storing instructions, and the processor is used to execute the instructions stored in the memory. When the instructions are executed, the processor is used to perform the control method described above.

[0096] This application also provides an electronic device, characterized in that it includes any of the power supply circuits provided in this application.

[0097] This application also provides a vehicle, characterized in that it includes any of the power supply circuits provided in this application. Optionally, one or more first loads and one or more second loads each include an intelligent driving controller.

[0098] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0099] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0100] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0101] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0102] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0103] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0104] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power supply circuit, characterized in that, include: The first power supply circuit includes a first battery and a DC / DC / DC converter. The input terminal of the DC / DC converter is connected to the first battery, and the output terminal of the DC / DC converter is used to supply power to the battery management system (BMS) of the first battery, the controller of the DC / DC converter, and one or more first loads. The BMS includes a built-in capacitor. The second power supply circuit includes a second battery, which is connected to the output terminal of the DC / DC converter via a switch. The second battery is used to supply power to the controller of the DC / DC converter and one or more second loads. The switch is configured to be on under normal conditions. If the first power supply circuit or the second power supply circuit fails, the switch is configured to switch from on to off. When the first power supply circuit is short-circuited, the built-in capacitor drives the BMS to control the first battery to output high voltage. The second power supply circuit supplies power to the controller of the DC / DC converter. The controller of the DC / DC converter controls the DC / DC converter to convert the high voltage to low voltage to maintain the current output. The current is used to blow the fuse at the fault location. If the fault is cleared, the switch is configured to switch from open to closed.

2. The power supply circuit as described in claim 1, characterized in that, If a short-circuit fault occurs in the third load of the one or more first loads, the switch is configured to switch from being on to being off.

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

4. The power supply circuit as described in claim 1, characterized in that, The fault or whether the fault has been eliminated is determined by detecting the current or voltage of the first power supply circuit and the second power supply circuit.

5. The power supply circuit as described in any one of claims 1 to 4, characterized in that, The first load and the second load each include a fourth load.

6. A control method for a power supply circuit, characterized in that, 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 / DC converter. The input terminal of the DC / DC converter is connected to the first battery, and the output terminal of the DC / DC converter supplies power to the battery management system (BMS) of the first battery, the controller of the DC / DC converter, and one or more first loads. The BMS includes a built-in capacitor. The second power supply circuit includes a second battery, which is connected to the output terminal of the DC / DC converter via a switch. The second battery supplies power to the controller of the DC / DC converter and one or more second loads. The control method includes: Detect the fault conditions of the first power supply circuit and the second power supply circuit; If either the first or second power supply circuit fails, the switch is disconnected. In the event of a short circuit in the first power supply circuit, the built-in capacitor drives the BMS to control the first battery to output high-voltage electricity. The second power supply circuit supplies power to the controller of the DC / DC converter. The controller of the DC / DC converter controls the DC / DC converter to convert the high-voltage electricity to low-voltage electricity to maintain current output. This current is used to blow the fuse at the fault location; or... If the faults in the first power supply circuit and the second power supply circuit are eliminated, the switch is turned on.

7. The control method as described in claim 6, characterized in that, The step of controlling the switch to be turned on or off based on the detection result includes: If a short-circuit fault is detected in the third load among the one or more first loads, the switch is disconnected, and the fuse connected to the third load blows under the action of the controller of the BMS and the DC / DC converter.

8. A control device for a power supply circuit, characterized in that, Includes a module for performing the control method as described in claim 6 or 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed on a computer, implement the control method as described in claim 6 or 7.

10. An electronic device, characterized in that, include: The power supply circuit as described in any one of claims 1 to 5.

11. A vehicle, characterized in that, include: The power supply circuit as described in any one of claims 1 to 5.

12. The vehicle as claimed in claim 11, characterized in that, Each of the one or more first loads and the one or more second loads includes an intelligent driving controller.

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