Low-voltage circuit control method, device, equipment, storage medium and system

Abstract

The application relates to a low-voltage circuit control method, device, equipment, storage medium and system, and relates to the technical field of vehicle control. The method is applied to a power management unit in a low-voltage circuit control system, and the method comprises the following steps: in the case that the current of the low-voltage circuit is greater than a preset current, judging whether a fault point of the low-voltage circuit control system is located in a second low-voltage circuit according to the voltage across the power management unit. Then, in the case that the fault point is not located in the second low-voltage circuit, controlling a direct-current converter to be disconnected, and determining the on-off state of the power management unit according to the current of the low-voltage circuit after the direct-current converter is disconnected, so that the second low-voltage circuit can at least work normally. In the case that the fault point is located in the second low-voltage circuit, controlling the power management unit to be in a disconnected state, so that the first low-voltage circuit can work normally. Meanwhile, the low-voltage circuit control system is composed of a single storage battery and a single direct-current converter, and the cost can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle control, in particular to the technical field of vehicle power supply, and specifically to a low-voltage circuit control method, device, equipment, storage medium and system. BACKGROUND

[0002] In order to ensure the reliability of intelligent driving, it is necessary to ensure the normal low-voltage power supply of electric appliances such as the vehicle controller, and in order to ensure the safety of driving, it is necessary to ensure the normal low-voltage power supply of safety-critical components such as the chassis braking system and the steering system. In order to meet the above requirements, the following method is usually used: a DC converter is connected with two battery circuits, and the two battery circuits supply power to low-voltage electric appliances at the same time.

[0003] However, the above method requires the setting of two batteries, which increases the hardware cost of vehicle manufacturing. Therefore, how to control the low-voltage circuit at low cost is a technical problem to be solved. SUMMARY

[0004] The present application provides a low-voltage circuit control method, device, equipment, storage medium and system to at least solve the technical problem of being unable to control the low-voltage circuit at low cost in the related art. The technical solution of the present application is as follows:

[0005] According to the first aspect of the present application, a low-voltage circuit control method is provided, which is applied to a power management unit in a low-voltage circuit control system. The low-voltage circuit control system further includes a DC converter and a low-voltage circuit. The low-voltage circuit includes a first low-voltage circuit and a second low-voltage circuit. The power management unit is used to control the on-off of the second low-voltage circuit. The DC converter is used to supply power to the load in the first low-voltage circuit, and in the case that the power management unit is in a closed state, to supply power to the load in the second low-voltage circuit. The second low-voltage circuit further includes a battery. The battery is used to supply power to the load in the second low-voltage circuit in the case that the power management unit is in an open state, and in the case that the power management unit is in a closed state and the DC converter is in an open state, to supply power to the load in the first low-voltage circuit and the second low-voltage circuit. The method includes: in the case that the current of the low-voltage circuit is greater than a preset current, judging whether the fault point of the low-voltage circuit control system is located in the second low-voltage circuit according to the voltage across the power management unit; in the case that the fault point is not located in the second low-voltage circuit, controlling the DC converter to be in an open state, and determining the on-off state of the power management unit according to the current of the low-voltage circuit after the DC converter is in an open state; in the case that the fault point is located in the second low-voltage circuit, controlling the power management unit to be in an open state.

[0006] According to the above technical means, in the case that the current of the low-voltage circuit is greater than the preset current, it can be determined that the low-voltage circuit is in an overcurrent state, that is, the low-voltage circuit control system fails. Then, whether the fault point of the low-voltage circuit control system is located in the second low-voltage circuit can be determined according to the voltage across the power management unit. Further, in the case that the fault point is not located in the second low-voltage circuit, whether the fault point of the low-voltage circuit control system is located in the DC converter can be determined by the current of the low-voltage circuit after the DC converter is in the off state, and the on-off state of the power management unit is determined, so that at least the second low-voltage circuit can work normally, so that the vehicle can still enter a safe state in the case that the low-voltage circuit control system fails. In the case that the fault point is located in the second low-voltage circuit, the power management unit is controlled to be in the off state, so that the first low-voltage circuit can work normally, so that the vehicle can still enter a safe state in the case that the low-voltage circuit control system fails. Meanwhile, the low-voltage circuit control method provided by the application is applied to the power management unit in the low-voltage circuit control system, and the low-voltage circuit control system further includes a DC converter, a first low-voltage circuit, a second low-voltage circuit, and the second low-voltage circuit further includes a storage battery. In this way, the manufacturing cost can be effectively reduced by setting a single DC converter and a single storage battery.

[0007] In a possible implementation, the first end of the power management unit is connected with the DC converter and the first low-voltage circuit respectively, and the second end of the power management unit is connected with the second low-voltage circuit. In the case that the current of the low-voltage circuit is greater than the preset current, whether the fault point of the low-voltage circuit control system is located in the second low-voltage circuit can be determined according to the voltage across the power management unit, including: in the case that the current of the low-voltage circuit is greater than the preset current, and the voltage at the first end of the power management unit is greater than the voltage at the second end of the power management unit, it is determined that the fault point is located in the second low-voltage circuit; in the case that the current of the low-voltage circuit is greater than the preset current, and the voltage at the first end of the power management unit is less than the voltage at the second end of the power management unit, it is determined that the fault point is not located in the second low-voltage circuit.

[0008] According to the above technical means, in the case that the voltage at the first end of the power management unit is greater than the voltage at the second end of the power management unit, it can be determined that the current direction is from the first end of the power management unit to the second end of the power management unit, indicating that the fault point is located in the second low-voltage circuit. Further, by the voltage across the power management unit, whether the fault point is located in the second low-voltage circuit can be accurately determined.

[0009] In a possible implementation, the determining the on-off state of the power management unit according to the voltage of the low-voltage circuit after the DC converter is in the off state comprises: if the voltage of the low-voltage circuit is greater than a preset voltage after the DC converter is in the off state, controlling the power management unit to be in the off state; and if the voltage of the low-voltage circuit is less than the preset voltage after the DC converter is in the off state, controlling the power management unit to be in the closed state.

[0010] According to the technical means, the application can determine whether the fault point is located in the first low-voltage circuit or the DC converter according to the current of the low-voltage circuit after the DC converter is in the off state. In this way, if the current of the low-voltage circuit is greater than a preset current, i.e., the fault point is located in the first low-voltage circuit, the power management unit is controlled to be in the off state, so that the second low-voltage circuit can work normally. Meanwhile, if the current of the low-voltage circuit is less than the preset current, i.e., the fault point is located in the DC converter, the power management unit is controlled to be in the closed state, so that the first low-voltage circuit and the second low-voltage circuit can work normally.

[0011] In a possible implementation, the method further comprises: in a case where the voltage of the low-voltage circuit is greater than a preset voltage, controlling the DC converter to be in the off state, and determining the on-off state of the power management unit according to the voltage of the low-voltage circuit after the DC converter is in the off state.

[0012] According to the technical means, the application can determine that the low-voltage circuit control system has an overvoltage fault in a case where the voltage of the low-voltage circuit is greater than a preset voltage. Further, the DC converter is controlled to be in the off state, and the voltage of the low-voltage circuit after the DC converter is in the off state can be used to determine whether the overvoltage fault point of the low-voltage circuit control system is located in the DC converter, so as to determine the on-off state of the power management unit, so that the low-voltage circuit control system can work normally.

[0013] In a possible implementation, the determining the on-off state of the power management unit according to the voltage of the low-voltage circuit after the DC converter is in the off state comprises: if the voltage of the low-voltage circuit is greater than a preset voltage after the DC converter is in the off state, controlling the power management unit to be in the off state; and if the voltage of the low-voltage circuit is less than the preset voltage after the DC converter is in the off state, controlling the power management unit to be in the closed state.

[0014] According to the technical means, if the voltage of the low-voltage circuit is less than a preset voltage after the DC converter is in the off state, it indicates that the overvoltage fault point is located in the DC converter. In this way, the power management unit is controlled to be in the closed state, so that the first low-voltage circuit and the second low-voltage circuit can work normally.

[0015] According to a second aspect of the present application, a low-voltage circuit control device is provided. The low-voltage circuit control device is applied to a power management unit in a low-voltage circuit control system. The low-voltage circuit control system further comprises a DC converter, a low-voltage circuit, the low-voltage circuit comprising a first low-voltage circuit and a second low-voltage circuit, the power management unit being configured to control the on-off state of the second low-voltage circuit, the DC converter being configured to supply power to a load in the first low-voltage circuit and, in the case that the power management unit is in a closed state, to a load in the second low-voltage circuit, the second low-voltage circuit further comprising a battery, the battery being configured to supply power to the load in the second low-voltage circuit in the case that the power management unit is in an open state, and to the loads in the first low-voltage circuit and the second low-voltage circuit in the case that the power management unit is in the closed state and the DC converter is in an open state, the low-voltage circuit control device comprising a determination unit, a processing unit and a control unit, the determination unit being configured to determine, in the case that a current of the low-voltage circuit is greater than a preset current, whether a fault point of the low-voltage circuit control system is located in the second low-voltage circuit according to a voltage across the power management unit, the processing unit being configured to, in the case that the fault point is not located in the second low-voltage circuit, control the DC converter to be in the open state, and determine the on-off state of the power management unit according to the current of the low-voltage circuit after the DC converter is in the open state, and the control unit being configured to, in the case that the fault point is located in the second low-voltage circuit, control the power management unit to be in the open state.

[0016] In a possible implementation, the first end of the power management unit is connected with the DC converter and the first low-voltage circuit respectively, and the second end of the power management unit is connected with the second low-voltage circuit, the determination unit is specifically configured to: in the case that the current of the low-voltage circuit is greater than the preset current, and the voltage at the first end of the power management unit is greater than the voltage at the second end of the power management unit, determine that the fault point is located in the second low-voltage circuit; and in the case that the current of the low-voltage circuit is greater than the preset current, and the voltage at the first end of the power management unit is less than the voltage at the second end of the power management unit, determine that the fault point is not located in the second low-voltage circuit.

[0017] In a possible implementation, the processing unit is specifically configured to: in the case that the current of the low-voltage circuit is greater than the preset current after the DC converter is in the open state, control the power management unit to be in the open state; and in the case that the current of the low-voltage circuit is less than the preset current after the DC converter is in the open state, control the power management unit to be in the closed state.

[0018] In a possible implementation, the processing unit is further configured to: in the case that the voltage of the low-voltage circuit is greater than a preset voltage, control the DC converter to be in the open state, and determine the on-off state of the power management unit according to the voltage of the low-voltage circuit after the DC converter is in the open state.

[0019] In a possible implementation, the processing unit is specifically configured to: if the voltage of the low-voltage loop is greater than the preset voltage after the DC converter is in the off state, control the power management unit to be in the off state; and if the voltage of the low-voltage loop is less than the preset voltage after the DC converter is in the off state, control the power management unit to be in the on state.

[0020] According to a third aspect provided by the present application, an electronic device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute the instructions to implement the method of the first aspect and any possible implementation thereof.

[0021] According to a fourth aspect provided by the present application, a computer-readable storage medium is provided, when instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device can execute the method of the first aspect and any possible implementation thereof.

[0022] According to a fifth aspect provided by the present application, a low-voltage circuit control system is provided, comprising: a DC converter, a low-voltage loop, and a power management unit for executing the method of the first aspect and any possible implementation thereof; the low-voltage loop comprises a first low-voltage loop and a second low-voltage loop; the power management unit is configured to control the on-off of the second low-voltage loop; the DC converter is configured to supply power to a load in the first low-voltage loop, and supply power to a load in the second low-voltage loop when the power management unit is in the on state; the second low-voltage loop further comprises a battery; the battery is configured to supply power to the load in the second low-voltage loop when the power management unit is in the off state, and supply power to the load in the first low-voltage loop and the second low-voltage loop when the power management unit is in the on state and the DC converter is in the off state.

[0023] According to a sixth aspect provided by the present application, a computer program product is provided, the computer program product comprising computer instructions, when the computer instructions are executed on an electronic device, the electronic device executes the method of the first aspect and any possible implementation thereof.

[0024] Therefore, the above technical features of the present application have the following beneficial effects:

[0025] (1) In the case that the fault point is not located in the second low-voltage circuit, whether the fault point of the low-voltage circuit control system is located in the direct current converter can be determined by the current of the low-voltage circuit after the direct current converter is in the open state, and the on-off state of the power management unit is determined, so that at least the second low-voltage circuit can work normally, and the vehicle can still enter a safe state in the case that the low-voltage circuit control system fails. In the case that the fault point is located in the second low-voltage circuit, the power management unit is controlled to be in the open state, so that the first low-voltage circuit can work normally, and the vehicle can still enter a safe state in the case that the low-voltage circuit control system fails. Meanwhile, the low-voltage circuit control method provided by the application is applied to the power management unit in the low-voltage circuit control system, and the low-voltage circuit control system further comprises a direct current converter, a first low-voltage circuit and a second low-voltage circuit, and the second low-voltage circuit further comprises a storage battery. In this way, the manufacturing cost can be effectively reduced by setting a single direct current converter and a single storage battery.

[0026] (2) In the case that the voltage at the first end of the power management unit is greater than the voltage at the second end of the power management unit, it can be determined that the current direction is from the first end of the power management unit to the second end of the power management unit, indicating that the fault point is located in the second low-voltage circuit. Further, whether the fault point is located in the second low-voltage circuit can be accurately determined by the voltage at the two ends of the power management unit.

[0027] (3) In the case that the current of the low-voltage circuit is greater than the preset current, i.e. the fault point is located in the first low-voltage circuit, the power management unit is controlled to be in the open state, so that the second low-voltage circuit can work normally. Meanwhile, in the case that the current of the low-voltage circuit is less than the preset current, i.e. the fault point is located in the direct current converter, the power management unit is controlled to be in the closed state, so that the first low-voltage circuit and the second low-voltage circuit can work normally.

[0028] (4) Whether the overvoltage fault point of the low-voltage circuit control system is located in the direct current converter can be determined, so that the on-off state of the power management unit is determined, so that the low-voltage circuit control system can work normally.

[0029] (5) After the direct current converter is in the open state, if the voltage of the low-voltage circuit is less than the preset voltage, it indicates that the overvoltage fault point is located in the direct current converter. In this way, the power management unit is controlled to be in the closed state, so that the first low-voltage circuit and the second low-voltage circuit can work normally.

[0030] It should be noted that the technical effects brought by any one of the implementation manners of the second aspect to the sixth aspect can be referred to the technical effects brought by the corresponding implementation manners in the first aspect, which will not be described here.

[0031] It should be understood that the general description and detailed description of the foregoing are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0032] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application, and do not limit the present application.

[0033] Figure 1 is a structural schematic diagram of a low-voltage circuit control system according to an exemplary embodiment;

[0034] Figure 2 is a flowchart of a low-voltage circuit control method according to an exemplary embodiment;

[0035] Figure 3 is a flowchart of another low-voltage circuit control method according to an exemplary embodiment;

[0036] Figure 4 is a flowchart of another low-voltage circuit control method according to an exemplary embodiment;

[0037] Figure 5 is a block diagram of a low-voltage circuit control device according to an exemplary embodiment;

[0038] Figure 6 is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0039] In order to make the ordinary person in the art better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0041] Before the low-voltage circuit control method provided by the present application is described in detail, the implementation environment (implementation architecture) involved in the present application will be briefly introduced.

[0042] The low-voltage circuit control method provided by the embodiment of the application can be applied to a power management unit in a low-voltage circuit control system. Figure 1 A structural schematic diagram of the low-voltage circuit control system 10 is shown. As shown in the figure, Figure 1 The low-voltage circuit control system 10 includes a power management unit 11, a direct-current converter 12, a first low-voltage circuit 13, a second low-voltage circuit 14, and loads (15). Figure 1 Exemplary loads 15 are shown. In actual application, more or fewer loads can exist, which are not limited by the application.

[0043] The low-voltage circuit includes the first low-voltage circuit 13 and the second low-voltage circuit 14. The first end of the power management unit 11 is connected with the direct-current converter 12 and the first low-voltage circuit 13 respectively, and the second end of the power management unit 11 is connected with the second low-voltage circuit 14. Figure 1 Exemplary loads 131 and 132 are shown. In actual application, more or fewer loads can exist, which are not limited by the application. The second low-voltage circuit 14 includes a storage battery 141 and loads (142). Figure 1 Exemplary loads 142 and 143 are shown. In actual application, more or fewer loads can exist, which are not limited by the application.

[0044] The power management unit 11 is used to control the on-off of the second low-voltage circuit 14.

[0045] The direct-current converter 12 is used to supply power to the loads in the first low-voltage circuit 13, and supply power to the loads in the second low-voltage circuit 14 in the case that the power management unit 11 is in the closed state.

[0046] The storage battery 15 is used to supply power to the loads in the second low-voltage circuit 14 in the case that the power management unit 11 is in the open state, and supply power to the loads in the first low-voltage circuit 14 and the second low-voltage circuit 12 in the case that the power management unit 11 is in the closed state and the direct-current converter 12 is in the open state.

[0047] In actual application, the low-voltage circuit control system provided by the embodiment of the application can be applied to a system with dual low-voltage power supply requirements. For a single controller system, the single controller can be connected to the first low-voltage circuit and the second low-voltage circuit simultaneously, such as the load 15 shown in the figure. Figure 1 For a dual controller system, the dual controllers can be connected to the first low-voltage circuit and the second low-voltage circuit respectively, such as the loads 131 and 142 shown in the figure. Figure 1

[0048] ​In practical applications, the high-voltage management controller is used to activate the high-voltage state of the whole vehicle, and the normal operation of the DC converter depends on the high-voltage state of the whole vehicle. Therefore, the high-voltage manager is usually arranged in the first low-voltage loop.

[0049] For ease of understanding, the low-voltage circuit control method provided in the present application is specifically introduced below in combination with the accompanying drawings.

[0050] Figure 2 A flowchart of a low-voltage circuit control method according to an exemplary embodiment is shown, which can be applied to a power management unit in a low-voltage circuit control system. As shown in Figure 2 the low-voltage circuit control method includes the following steps:

[0051] S201, the power management unit determines whether the fault point of the low-voltage circuit control system is located in the second low-voltage loop according to the voltage across the power management unit when the current of the low-voltage loop is greater than the preset current.

[0052] As a possible implementation manner, the power management unit obtains the current of the low-voltage loop, and obtains the voltage across the power management unit when the current of the low-voltage loop is greater than the preset current. Further, the power management unit determines whether the fault point of the low-voltage circuit control system is located in the second low-voltage loop according to the voltage across the power management unit.

[0053] In practical applications, the power management unit can be a power management unit, and the power management unit can also be a hardware network separator (hardware network separator, HNS). The power management unit is built-in with a metal-oxide-semiconductor field-effect transistor (metal-oxide-semiconductor field-effect transistor, MOSFET). The DC converter can be a direct current (direct current, DC / DC).

[0054] The specific implementation manner of this step can refer to the subsequent description of the embodiments of the present application, which will not be described here.

[0055] S202, the power management unit controls the DC converter to be in an off state when the fault point is not located in the second low-voltage loop.

[0056] S203, the power management unit determines the on-off state of the power management unit according to the current of the low-voltage loop after the DC converter is in the off state.

[0057] As a possible implementation, the power management unit controls the DC converter to be in the off state, then acquires the current of the low-voltage loop again, and determines the on-off state of the power management unit according to the current of the low-voltage loop.

[0058] The specific implementation of this step can refer to the subsequent description of the embodiments of the present application, and will not be described here in detail.

[0059] S204, in the case where the fault point is located in the second low-voltage loop, the power management unit is controlled to be in the off state.

[0060] It can be understood that, in the case where the current of the low-voltage loop is greater than the preset current, it can be determined that the low-voltage loop is in an overcurrent state, i.e., the low-voltage circuit control system has a fault. Then, according to the voltage across the power management unit, it can be determined whether the fault point of the low-voltage circuit control system is located in the second low-voltage loop. Further, in the case where the fault point is not located in the second low-voltage loop, the current of the low-voltage loop after the DC converter is in the off state can be used to determine whether the fault point of the low-voltage circuit control system is located in the DC converter, and the on-off state of the power management unit is determined, so that at least the second low-voltage loop can work normally, so that the vehicle can still enter a safe state in the case where the low-voltage circuit control system has a fault. In the case where the fault point is located in the second low-voltage loop, the power management unit is controlled to be in the off state, so that the first low-voltage loop can work normally, so that the vehicle can still enter a safe state in the case where the low-voltage circuit control system has a fault. At the same time, the low-voltage circuit control method proposed in the present application is applied to the power management unit in the low-voltage circuit control system, and the low-voltage circuit control system further includes a DC converter, a first low-voltage loop, a second low-voltage loop, and the second low-voltage loop further includes a storage battery. In this way, by setting a single DC converter and a single storage battery, the manufacturing cost can be effectively reduced.

[0061] In some embodiments, the first end of the power management unit is connected with the DC converter and the first low-voltage loop respectively, and the second end of the power management unit is connected with the second low-voltage loop. In order to accurately determine whether the fault point is located in the second low-voltage loop, S201 can be implemented in the following manner:

[0062] S301, in the case where the current of the low-voltage loop is greater than the preset current, and the voltage at the first end of the power management unit is greater than the voltage at the second end of the power management unit, it is determined that the fault point is located in the second low-voltage loop.

[0063] As a possible implementation manner, the power management unit obtains the voltage across the power management unit when the current of the low-voltage loop is greater than the preset current. Then, the power management unit determines that the fault point is located in the second low-voltage loop when the voltage at the first end of the power management unit is greater than the voltage at the second end of the power management unit.

[0064] S302, the power management unit determines that the fault point is not located in the second low-voltage loop when the current of the low-voltage loop is greater than the preset current and the voltage at the first end of the power management unit is less than the voltage at the second end of the power management unit.

[0065] As a possible implementation manner, the power management unit obtains the voltage across the power management unit when the current of the low-voltage loop is greater than the preset current. Then, the power management unit determines that the fault point is not located in the second low-voltage loop when the voltage at the first end of the power management unit is less than the voltage at the second end of the power management unit.

[0066] It can be understood that the first end of the power management unit is connected with the DC converter and the first low-voltage loop respectively, and the second end of the power management unit is connected with the second low-voltage loop. In this way, when the voltage at the first end of the power management unit is greater than the voltage at the second end of the power management unit, it can be determined that the current direction is from the first end of the power management unit to the second end of the power management unit, indicating that the fault point is located in the second low-voltage loop. Further, by the voltage across the power management unit, it can be accurately determined whether the fault point is located in the second low-voltage loop.

[0067] In some embodiments, in order to determine whether the fault point is located in the first low-voltage loop, the above S203 can be implemented in the following manner:

[0068] S401, the power management unit controls the power management unit to be in an open state when the current of the low-voltage loop is greater than the preset current after the DC converter is in the open state.

[0069] As a possible implementation manner, the power management unit obtains the current of the low-voltage loop again after the DC converter is in the open state. Then, the power management unit controls the power management unit to be in the open state when the current of the low-voltage loop is greater than the preset current.

[0070] S402, the power management unit controls the power management unit to be in a closed state when the current of the low-voltage loop is less than the preset current after the DC converter is in the open state.

[0071] As a possible implementation manner, the power management unit obtains the current of the low-voltage loop again after the DC converter is in the open state. Then, the power management unit controls the power management unit to be in the closed state in a case that the current of the low-voltage loop is less than the preset current.

[0072] It can be understood that, after the DC converter is in the open state, whether the fault point is located in the first low-voltage loop or the DC converter can be determined by the current of the low-voltage loop. In this way, in a case that the current of the low-voltage loop is greater than the preset current, i.e., the fault point is located in the first low-voltage loop, the power management unit is controlled to be in the open state, so that the second low-voltage loop can work normally. Meanwhile, in a case that the current of the low-voltage loop is less than the preset current, i.e., the fault point is located in the DC converter, the power management unit is controlled to be in the closed state, so that the first low-voltage loop and the second low-voltage loop can work normally.

[0073] In some embodiments, in a case that the overvoltage fault point of the low-voltage circuit control system is located in the DC converter, in order to control the low-voltage circuit control system to work normally, the low-voltage circuit control method provided by the embodiment of the application further includes:

[0074] S501, the power management unit controls the DC converter to be in the open state in a case that the voltage of the low-voltage loop is greater than a preset voltage.

[0075] As a possible implementation manner, the power management unit obtains the voltage of the low-voltage loop, and sends an open signal to the DC converter through a controller area network (CAN) in a case that the voltage of the low-voltage loop is greater than a preset voltage, so as to control the DC converter to be in the open state.

[0076] S502, the power management unit determines the on-off state of the power management unit according to the voltage of the low-voltage loop after the DC converter is in the open state.

[0077] It can be understood that, in a case that the voltage of the low-voltage loop is greater than the preset voltage, it can be determined that the overvoltage fault of the low-voltage circuit control system occurs. Further, the DC converter is controlled to be in the open state, and whether the overvoltage fault point of the low-voltage circuit control system is located in the DC converter can be determined according to the voltage of the low-voltage loop after the DC converter is in the open state, so as to determine the on-off state of the power management unit, so that the low-voltage circuit control system can work normally.

[0078] In some embodiments, in a case that the overvoltage fault point is located in the DC converter, in order to control the low-voltage circuit control system to work normally, the above S502 can be implemented in the following manner:

[0079] S601, after the DC converter is in the open state, if the voltage of the low-voltage loop is greater than a preset voltage, the power management unit is controlled to be in the open state.

[0080] As a possible implementation, after the DC converter is in the open state, the power management unit acquires the voltage of the low-voltage loop. Then, in the case that the voltage of the low-voltage loop is greater than a preset voltage, the power management unit is controlled to be in the open state.

[0081] S602, after the DC converter is in the open state, if the voltage of the low-voltage loop is less than a preset voltage, the power management unit is controlled to be in the closed state.

[0082] As a possible implementation, after the DC converter is in the open state, the power management unit acquires the voltage of the low-voltage loop. Then, in the case that the voltage of the low-voltage loop is less than a preset voltage, the power management unit is controlled to be in the closed state.

[0083] It can be understood that, after the DC converter is in the open state, if the voltage of the low-voltage loop is less than a preset voltage, it indicates that the overvoltage fault point is located at the DC converter. In this way, the power management unit is controlled to be in the closed state, so that the first low-voltage loop and the second low-voltage loop can work normally.

[0084] In some embodiments, in the case that the low-voltage circuit control system is in an overcurrent state, in order to control the low-voltage circuit control system to operate normally at a low cost, the low-voltage circuit control method provided by the embodiments of the present application can be implemented in the following manner: Figure 3

[0085] S701, the power management unit acquires the current of the low-voltage loop.

[0086] S702, in the case that the current of the low-voltage loop is greater than a preset current, the power management unit acquires the voltage across the power management unit.

[0087] S703, the power management unit determines whether the voltage at the first end of the power management unit is greater than the voltage at the second end of the power management unit.

[0088] S704, in the case that the voltage at the first end of the power management unit is greater than the voltage at the second end of the power management unit, the power management unit is controlled to be in the open state.

[0089] S705, in the case that the voltage at the first end of the power management unit is less than the voltage at the second end of the power management unit, the DC converter is controlled to be in the open state.

[0090] ​S706, the power management unit acquires the current of the low-voltage circuit.

[0091] S707, the power management unit determines whether the current of the low-voltage circuit is greater than a preset current.

[0092] S708, the power management unit controls the power management unit to be in an open state in the case that the current of the low-voltage circuit is greater than the preset current.

[0093] S709, the power management unit controls the power management unit to be in a closed state in the case that the current of the low-voltage circuit is less than the preset current.

[0094] In some embodiments, in the case that the overvoltage state occurs in the low-voltage circuit control system, in order to control the low-voltage circuit control system to operate normally at a low cost, as shown in the following table, the low-voltage circuit control method provided by the embodiments of the present application can also be implemented in the following manner: Figure 4

[0095] S801, the power management unit acquires the voltage of the low-voltage circuit.

[0096] S802, the power management unit controls the DC converter to be in an open state in the case that the voltage of the low-voltage circuit is greater than a preset voltage.

[0097] S803, the power management unit acquires the voltage of the low-voltage circuit.

[0098] S804, the power management unit determines whether the voltage of the low-voltage circuit is greater than the preset voltage.

[0099] S805, the power management unit controls the power management unit to be in an open state in the case that the voltage of the low-voltage circuit is greater than the preset voltage.

[0100] S806, the power management unit controls the power management unit to be in a closed state in the case that the voltage of the low-voltage circuit is less than the preset voltage.

[0101] The above mainly introduces the scheme provided by the embodiments of the present application from the perspective of the method. In order to implement the above functions, the low-voltage circuit control device or the electronic device or the power management unit contains the hardware structure and / or software module for executing the corresponding functions. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed in the present text, the present application can be realized in the form of hardware or the combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. The professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0102] ​The embodiment of the present application can divide the functional modules of the low-voltage circuit control device or the electronic device or the power management unit according to the above method. For example, the low-voltage circuit control device or the electronic device or the power management unit can include various functional modules corresponding to various functional divisions, or two or more functions can be integrated in one processing module. The integrated module can be realized in the form of hardware or in the form of a software functional module. It should be noted that the division of the modules in the embodiment of the present application is illustrative, and is only a logical functional division. In actual implementation, another division mode can be used.

[0103] Figure 5 Fig. 1 is a block diagram of a low-voltage circuit control device according to an exemplary embodiment. The low-voltage circuit control device 900 can be applied to a power management unit in a low-voltage circuit control system. Referring to Fig. 1, Figure 5 the low-voltage circuit control device 900 includes a determination unit 901, a processing unit 902, and a control unit 903.

[0104] The determination unit 901 is configured to determine, when the current of the low-voltage circuit is greater than a preset current, whether a fault point of the low-voltage circuit control system is located in the second low-voltage circuit according to the voltage across the power management unit.

[0105] The processing unit 902 is configured to control the DC converter to be in an off state when the fault point is not located in the second low-voltage circuit, and determine the on-off state of the power management unit according to the current of the low-voltage circuit after the DC converter is in the off state.

[0106] The control unit 903 is configured to control the power management unit to be in an off state when the fault point is located in the second low-voltage circuit.

[0107] Optionally, the first end of the power management unit is connected with the DC converter and the first low-voltage circuit respectively, and the second end of the power management unit is connected with the second low-voltage circuit. In order to accurately determine whether the fault point is located in the second low-voltage circuit, as shown in Figure 5 the determination unit 901 is specifically configured to:

[0108] when the current of the low-voltage circuit is greater than the preset current, and the voltage at the first end of the power management unit is greater than the voltage at the second end of the power management unit, determine that the fault point is located in the second low-voltage circuit.

[0109] when the current of the low-voltage circuit is greater than the preset current, and the voltage at the first end of the power management unit is less than the voltage at the second end of the power management unit, determine that the fault point is not located in the second low-voltage circuit.

[0110] Optionally, in order to determine whether the fault point is located in the first low-voltage circuit, as shown inFigure 5 As shown, the processing unit 902 described above is specifically used for:

[0111] If the current in the low-voltage circuit is greater than the preset current after the DC-DC converter is in the off state, the control power management unit will be in the off state.

[0112] If the current in the low-voltage circuit is less than the preset current after the DC-DC converter is in the off state, the control power management unit will be in the closed state.

[0113] Optionally, in the event of an overvoltage fault in the low-voltage circuit control system, in order to maintain the normal operation of the low-voltage circuit control system, such as... Figure 5 As shown, the processing unit 902 described above is further configured to:

[0114] When the voltage in the low-voltage circuit is greater than the preset voltage, the DC-DC converter is controlled to be in the off state, and the on / off state of the power management unit is determined based on the voltage in the low-voltage circuit after the DC-DC converter is in the off state.

[0115] Optionally, if the overvoltage fault point is located in the DC-DC converter, in order to ensure the normal operation of the low-voltage circuit control system, such as... Figure 5 As shown, the processing unit 902 described above is specifically used for:

[0116] If the voltage of the low-voltage circuit is greater than the preset voltage after the DC-DC converter is in the off state, the control power management unit will be in the off state.

[0117] If the voltage of the low-voltage circuit is less than the preset voltage after the DC-DC converter is in the off state, the control power management unit will be in the closed state.

[0118] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0119] Figure 6 This is a block diagram illustrating an electronic device according to an exemplary embodiment. Figure 6 As shown, the electronic device 1000 includes, but is not limited to, a processor 1001 and a memory 1002.

[0120] The memory 1002 described above is used to store the executable instructions of the processor 1001. It is understood that the processor 1001 is configured to execute instructions to implement the low-voltage circuit control method in the above embodiments.

[0121] It should be noted that those skilled in the art will understand that Figure 6 The electronic device structure shown does not constitute a limitation on the electronic device; the electronic device may include, but is not limited to, other electronic devices.Figure 6 more or less components, or to combine certain components, or to arrange the various components differently.

[0122] The processor 1001 is a control center of the electronic device, which connects each part of the entire electronic device by various interfaces and lines, and performs various functions of the electronic device and processes data by running or executing software programs and / or modules stored in the memory 1002 and calling data stored in the memory 1002, thereby monitoring the entire electronic device. The processor 1001 can include one or more processing units. Alternatively, the processor 1001 can integrate an application processor and a modem processor, in which the application processor mainly processes an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 1001.

[0123] The memory 1002 can be used to store software programs and various data. The memory 1002 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, application programs (such as the determination unit 901, the processing unit 902, and the control unit 903) required by at least one function module, and the like. In addition, the memory 1002 can include a high-speed random access memory, and can also include a non-volatile memory, for example, at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory device.

[0124] In the exemplary embodiments, a computer readable storage medium including instructions is also provided, for example, the memory 1002 including instructions, which can be executed by the processor 1001 of the electronic device 1000 to implement the low-voltage circuit control method in the above embodiments.

[0125] In actual implementation, Figure 5 The functions of the determination unit 901, the processing unit 902, and the control unit 903 in the above embodiments can be implemented by the processor 1001 calling the computer program stored in the memory 1002. Figure 6 The specific execution process can refer to the description of the low-voltage circuit control method in the above embodiments, and will not be described here.

[0126] Alternatively, the computer readable storage medium can be a non-transitory computer readable storage medium, for example, the non-transitory computer readable storage medium can be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0127] In the example embodiment, the application also provides a low-voltage circuit control system, which comprises a power supply module, a battery, and a controller for executing the method of the first aspect and any possible implementation thereof, the controller being connected in parallel with the power supply module and the battery, respectively.

[0128] In the example embodiment, the application also provides a computer program product comprising one or more instructions executable by a processor of an electronic device to perform the low-voltage circuit control method in the above-described embodiments.

[0129] It should be noted that the instructions in the computer-readable storage medium or the one or more instructions in the computer program product are executed by the processor of the electronic device to implement each process of the above-described low-voltage circuit control method embodiment, and achieve the same technical effects as the above-described low-voltage circuit control method. To avoid repetition, this will not be repeated here.

[0130] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-described functional modules is taken as an example for illustration, and in actual application, the above-described functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0131] In the several embodiments provided by the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative, and the division of the modules or units is only a logical function division, and there can be another division way in actual implementation, for example, a plurality of units or components can be combined or integrated into another device, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0132] The units described as separate components can or can not be physically separate, and the components shown as units can be one physical unit or multiple physical units, that is, can be located in one place, or can be distributed to multiple different places. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0133] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0134] When the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application essentially or the parts that make contributions to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The software product is stored in a storage medium, including a plurality of instructions to make a device (which can be a single-chip microcomputer, a chip, etc.) or a processor execute all or part of the steps of the method of each embodiment of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk, and various media that can store program codes.

[0135] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any change or replacement within the technical scope disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A low voltage circuit control method, characterized by, The power management unit is applied to a low-voltage circuit control system, and the low-voltage circuit control system further comprises a direct current converter and a low-voltage loop; the low-voltage loop comprises a first low-voltage loop and a second low-voltage loop; the power management unit is used for controlling the on-off of the second low-voltage loop; the direct current converter is used for supplying power to loads in the first low-voltage loop and, in the case that the power management unit is in a closed state, supplying power to loads in the second low-voltage loop; the second low-voltage loop further comprises a storage battery; the storage battery is used for supplying power to loads in the second low-voltage loop in the case that the power management unit is in an open state, and supplying power to loads in the first low-voltage loop and the second low-voltage loop in the case that the power management unit is in the closed state and the direct current converter is in an open state; a first end of the power management unit is connected with the direct current converter and the first low-voltage loop respectively, and a second end of the power management unit is connected with the second low-voltage loop; The method comprises: In the case that the current of the low-voltage loop is greater than a preset current and the voltage of the first end of the power management unit is greater than the voltage of the second end of the power management unit, it is determined that the fault point of the low-voltage circuit control system is located in the second low-voltage loop; In the case that the current of the low-voltage loop is greater than the preset current and the voltage of the first end of the power management unit is less than the voltage of the second end of the power management unit, it is determined that the fault point is not located in the second low-voltage loop; In the case that the fault point is not located in the second low-voltage loop, the direct current converter is controlled to be in an open state, and the on-off state of the power management unit is determined according to the current of the low-voltage loop after the direct current converter is in the open state; In the case that the fault point is located in the second low-voltage loop, the power management unit is controlled to be in an open state.

2. The method of claim 1, wherein, Determining the on-off state of the power management unit according to the current of the low-voltage loop after the direct current converter is in the open state comprises: If the current of the low-voltage loop is greater than the preset current after the direct current converter is in the open state, the power management unit is controlled to be in an open state; If the current of the low-voltage loop is less than the preset current after the direct current converter is in the open state, the power management unit is controlled to be in a closed state.

3. The method according to claim 1 or 2, characterized in that, The method further comprises: In the case that the voltage of the low-voltage loop is greater than a preset voltage, the direct current converter is controlled to be in an open state, and the on-off state of the power management unit is determined according to the voltage of the low-voltage loop after the direct current converter is in the open state.

4. The method of claim 3, wherein, Determining the on-off state of the power management unit according to the voltage of the low-voltage loop after the direct current converter is in the open state comprises: If the voltage of the low-voltage loop is greater than the preset voltage after the direct current converter is in the open state, the power management unit is controlled to be in an open state; After the DC converter is in the off state, if the voltage of the low-voltage circuit is less than the preset voltage, the power management unit is controlled to be in the closed state.

5. A low voltage circuit control device, characterized by The power management unit is applied to a low-voltage circuit control system, and the low-voltage circuit control system further comprises a DC converter and a low-voltage circuit; the low-voltage circuit comprises a first low-voltage circuit and a second low-voltage circuit; the power management unit is used for controlling the on-off of the second low-voltage circuit; the DC converter is used for supplying power to a load in the first low-voltage circuit and, in the case that the power management unit is in the closed state, supplying power to a load in the second low-voltage circuit; the second low-voltage circuit further comprises a storage battery; the storage battery is used for supplying power to a load in the second low-voltage circuit in the case that the power management unit is in the off state, and supplying power to a load in the first low-voltage circuit and the second low-voltage circuit in the case that the power management unit is in the closed state and the DC converter is in the off state; a first end of the power management unit is connected with the DC converter and the first low-voltage circuit respectively, and a second end of the power management unit is connected with the second low-voltage circuit; The low-voltage circuit control device comprises a determination unit, a processing unit and a control unit; The determination unit is configured to determine that a fault point of the low-voltage circuit control system is located in the second low-voltage circuit in the case that the current of the low-voltage circuit is greater than a preset current and the voltage of the first end of the power management unit is greater than the voltage of the second end of the power management unit, and determine that the fault point is not located in the second low-voltage circuit in the case that the current of the low-voltage circuit is greater than the preset current and the voltage of the first end of the power management unit is less than the voltage of the second end of the power management unit. The processing unit is configured to control the DC converter to be in the off state in the case that the fault point is not located in the second low-voltage circuit, and determine the on-off state of the power management unit according to the current of the low-voltage circuit after the DC converter is in the off state. The control unit is configured to control the power management unit to be in the off state in the case that the fault point is located in the second low-voltage circuit.

6. The apparatus of claim 5, wherein, The processing unit is specifically configured to: control the power management unit to be in the off state in the case that the current of the low-voltage circuit is greater than the preset current after the DC converter is in the off state; control the power management unit to be in the closed state in the case that the current of the low-voltage circuit is less than the preset current after the DC converter is in the off state.

7. The apparatus of claim 5 or 6, wherein, The processing unit is further configured to: control the DC converter to be in the off state in the case that the voltage of the low-voltage circuit is greater than a preset voltage, and determine the on-off state of the power management unit according to the voltage of the low-voltage circuit after the DC converter is in the off state.

8. The apparatus of claim 7, wherein, The processing unit is specifically configured to: control the power management unit to be in the off state in the case that the voltage of the low-voltage circuit is greater than the preset voltage after the DC converter is in the off state; After the direct current converter is in the off state, if the voltage of the low-voltage loop is less than the preset voltage, the power management unit is controlled to be in the closed state.

9. An electronic device, comprising: Comprise: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions to implement the method of any one of claims 1-4.

10. A computer-readable storage medium, characterized in that, When the computer-executable instructions stored in the computer-readable storage medium are executed by the processor of the electronic device, the electronic device can perform the method of any one of claims 1-4.

11. A low voltage circuit control system, characterized by Comprise: a direct current converter, a low-voltage loop, and a power management unit for implementing the method of any one of claims 1-4; the low-voltage loop comprises a first low-voltage loop and a second low-voltage loop; the power management unit is used to control the on-off of the second low-voltage loop; the direct current converter is used to supply power to the load in the first low-voltage loop, and in the case that the power management unit is in the closed state, supply power to the load in the second low-voltage loop; the second low-voltage loop further comprises a battery; the battery is used to supply power to the load in the second low-voltage loop in the case that the power management unit is in the off state, and in the case that the power management unit is in the closed state and the direct current converter is in the off state, supply power to the load in the first low-voltage loop and the second low-voltage loop.

Images