Power management device, power management method, electronic equipment and storage medium

Abstract

The invention provides a power supply management device, a power supply management method, electronic equipment and a storage medium. The power supply management device comprises a high-voltage power supply module, a low-voltage power supply module, a motor controller, a power supply distribution unit, a conversion circuit and a low-voltage load, the high-voltage power supply module is connected with the low-voltage load through the conversion circuit; the low-voltage power supply module is connected with the motor controller and the low-voltage load; the motor controller comprises an emergency power supply; the emergency power supply is connected with the high-voltage power supply module through the power distribution unit. The emergency power supply module in the embodiment of the invention can replace the low-voltage power supply module in an abnormal state in the running process of the target vehicle, so that the normal operation of the motor controller is ensured, and the vehicle is prevented from being out of control; in the stopping process of the target vehicle, the power consumption of the low-voltage power supply module is reduced, the service life of the low-voltage power supply module is prolonged, the use frequency of the conversion circuit is reduced, and the energy consumption of the conversion circuit is reduced.

Description

Technical Field

[0001] The present application relates to the field of power management technology, and in particular to a power management device, a power management method, an electronic device and a storage medium. Background Art

[0002] As people's environmental awareness continues to improve, new energy vehicles have become one of the indispensable means of transportation for the public, especially electric vehicles. Due to the power limit of electric vehicles, reducing energy consumption during driving or stopping (parking and shutting down) is an issue that needs close attention.

[0003] Existing electric vehicles frequently turn on the conversion circuit (DC / DC) when using some functions. For example, when the sentinel mode is turned on, a large amount of power will be consumed. Since the sentinel mode is powered by a battery, the battery power will be lost quickly. When the battery power is insufficient, it is necessary to replenish power from the battery pack RESS (high voltage) through the conversion circuit. This way of replenishing power not only causes power loss in the conversion circuit, but also reduces the service life of the battery. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a power management device, a power management method, an electronic device and a storage medium to overcome the problems in the prior art.

[0005] In a first aspect, an embodiment of the present application provides a power management device, which acts on a target vehicle, and includes: a high-voltage power supply module, a low-voltage power supply module, a motor controller, a power distribution unit, a conversion circuit, and a low-voltage load; the high-voltage power supply module is connected to the low-voltage load through the conversion circuit; the low-voltage power supply module is connected to the motor controller, and the low-voltage power supply module is connected to the low-voltage load; the motor controller includes an emergency power supply; the emergency power supply is connected to the high-voltage power supply module through the power distribution unit;

[0006] During the driving of the target vehicle, the high-voltage power supply module is used to provide electric energy to the motor controller and the low-voltage load and power the low-voltage power supply module through the conversion circuit;

[0007] The low-voltage power supply module is used to supply power to the motor controller;

[0008] The emergency power supply is used to supply power to the motor controller when the low-voltage power supply module is abnormal;

[0009] During the stopping process of the target vehicle, the high-voltage power supply module is used to supply power to the emergency power supply through the power distribution unit;

[0010] When the low-voltage load does not reach the preset power consumption threshold, the emergency power supply is used to provide power to the motor controller, the low-voltage load and the low-voltage power supply module respectively;

[0011] When the low-voltage load reaches a preset power consumption threshold, the high-voltage power supply module is used to provide electrical energy to the low-voltage load and power to the low-voltage power supply module through the conversion circuit.

[0012] In some technical solutions of the present application, the motor controller further includes: a valve circuit, a drive module and a control module; the emergency power supply is connected to one end of the valve circuit, and the other end of the valve circuit is connected to the low-voltage power supply module and the low-voltage load; the emergency power supply is also connected to the drive module, and the drive module is connected to the control module;

[0013] The emergency power supply is used to supply power to the drive module; the drive module is used to supply the received power to the control module;

[0014] During the driving process of the target vehicle, the valve circuit is used to detect the state of the low-voltage power supply module, and when the low-voltage power supply module is abnormal, cut off the connection between the emergency power supply and the low-voltage load and the low-voltage power supply module, so that the emergency power supply is only used to power the drive module.

[0015] In some technical solutions of the present application, the valve circuit includes an execution circuit and a detection circuit;

[0016] The detection circuit is used to detect the state of the low-voltage power supply module;

[0017] The execution circuit is used to cut off the connection between the emergency power supply and the low-voltage load and the low-voltage power supply module.

[0018] In some technical solutions of the present application, the above-mentioned detection circuit includes: a comparator and a first diode; the cathode of the first diode is connected to the low-voltage power supply module, and the anode of the first diode is connected to the first input terminal of the comparator; the second input terminal of the comparator is connected to a preset first voltage; the cathode of the first diode is also connected to the execution circuit; and the output terminal of the comparator is connected to the execution circuit.

[0019] In some technical solutions of the present application, when the low-voltage power supply module is in a normal state, the comparator outputs a low level so that the execution circuit maintains the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module;

[0020] When the low-voltage power supply module is in an abnormal state, the comparator outputs a high level to enable the execution circuit to cut off the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module.

[0021] In some technical solutions of the present application, the execution circuit includes: a first MOS tube, a first resistor, a second resistor, a third resistor, a second MOS tube, a second diode and a third diode;

[0022] The drain of the first MOS tube is connected to the detection circuit, the source of the first MOS tube is connected to the emergency power supply, the source of the first MOS tube is connected to the drain of the second MOS tube through the first resistor and the second resistor, and the gate of the first MOS tube is connected between the first resistor and the second resistor; the source of the second MOS tube is grounded, the gate of the second MOS tube is connected to one end of the third resistor, the other end of the third resistor is connected to a preset second voltage, the gate of the second MOS tube is also connected to the positive electrode of the third diode, and the negative electrode of the third diode is connected to the output end of the control module; the gate of the second MOS tube is also connected to the positive electrode of the second diode, and the negative electrode of the second diode is connected to the detection circuit; the input end of the control module is also connected between the detection circuit and the negative electrode of the second diode.

[0023] In some technical solutions of the present application, when the detection circuit outputs a high voltage or the control module outputs a high voltage, the first MOS tube is in a cut-off state, cutting off the connection between the emergency power supply and the low-voltage load providing power and the low-voltage power supply module;

[0024] When the detection circuit outputs a low voltage, the first MOS tube is in a conducting state, maintaining the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module.

[0025] In a second aspect, an embodiment of the present application provides a power management method, which is applied to a power management device, wherein the power management device acts on a target vehicle, and the power management device includes: a high-voltage power supply module, a low-voltage power supply module, a motor controller, a power distribution unit, a conversion circuit, and a low-voltage load; the high-voltage power supply module is connected to the low-voltage load through the conversion circuit; the low-voltage power supply module is connected to the motor controller, and the low-voltage power supply module is connected to the low-voltage load; the motor controller includes an emergency power supply; the emergency power supply is connected to the high-voltage power supply module through the power distribution unit, and the method includes:

[0026] During the driving of the target vehicle, the high-voltage power supply module provides electric energy to the motor controller and the low-voltage load and supplies power to the low-voltage power supply module through the conversion circuit;

[0027] The low voltage power supply module supplies power to the motor controller;

[0028] The emergency power supply supplies power to the motor controller when the low-voltage power supply module is abnormal;

[0029] During the stopping process of the target vehicle, the high voltage power supply module supplies power to the emergency power supply through the power distribution unit;

[0030] When the low-voltage load does not reach the preset power consumption threshold, the emergency power supply provides power to the motor controller, the low-voltage load and the low-voltage power supply module respectively;

[0031] When the low-voltage load reaches a preset power consumption threshold, the high-voltage power supply module provides electrical energy to the low-voltage load and supplies power to the low-voltage power supply module through the conversion circuit.

[0032] In a third aspect, an embodiment of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned power management method when executing the computer program.

[0033] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned power management method are executed.

[0034] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0035] The power management device in the embodiment of the present application acts on the target vehicle, and the power management device includes: a high-voltage power supply module, a low-voltage power supply module, a motor controller, a power distribution unit, a conversion circuit and a low-voltage load; the high-voltage power supply module is connected to the low-voltage load through the conversion circuit; the low-voltage power supply module is connected to the motor controller, and the low-voltage power supply module is connected to the low-voltage load; the motor controller includes an emergency power supply; the emergency power supply is connected to the high-voltage power supply module through the power distribution unit; during the driving process of the target vehicle, the high-voltage power supply module is used to provide electrical energy and the low-voltage power supply to the motor controller and the low-voltage load respectively through the conversion circuit. module power supply; the low-voltage power supply module is used to power the motor controller; the emergency power supply is used to power the motor controller when the low-voltage power supply module is abnormal; during the stop process of the target vehicle, the high-voltage power supply module is used to power the emergency power supply through the power distribution unit; when the low-voltage load does not reach the preset power consumption threshold, the emergency power supply is used to provide power to the motor controller, the low-voltage load and the low-voltage power supply module respectively; when the low-voltage load reaches the preset power consumption threshold, the high-voltage power supply module is used to provide power to the low-voltage load and the low-voltage power supply module respectively through the conversion circuit.

[0036] The emergency power supply module in the embodiment of the present application can replace the low-voltage power supply module in an abnormal state during the driving of the target vehicle, thereby ensuring the normal operation of the motor controller and preventing the vehicle from losing control; during the stopping of the target vehicle, the power consumption of the low-voltage power supply module is reduced, the service life of the low-voltage power supply module is extended, the number of times the conversion circuit is used is reduced, and the energy consumption of the conversion circuit is reduced.

[0037] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of a power management device provided in an embodiment of the present application is shown;

[0040] Figure 2 A schematic diagram of another power management device provided in an embodiment of the present application is shown;

[0041] Figure 3 A schematic diagram of a valve circuit provided in an embodiment of the present application is shown;

[0042] Figure 4 A schematic diagram of a power management method provided in an embodiment of the present application is shown;

[0043] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.

[0045] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0046] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0047] As people's environmental awareness continues to improve, new energy vehicles have become one of the indispensable means of transportation for the public, especially electric vehicles. Due to the power limit of electric vehicles, reducing energy consumption during driving or stopping (parking and shutting down) is an issue that needs close attention.

[0048] Existing electric vehicles frequently turn on the conversion circuit (DC / DC) when using some functions. For example, when the sentinel mode is turned on, a large amount of power will be consumed. Since the sentinel mode is powered by a battery, the battery power will be lost quickly. When the battery power is insufficient, it is necessary to replenish power from the battery pack RESS (high voltage) through the conversion circuit. This way of replenishing power not only causes power loss in the conversion circuit, but also reduces the service life of the battery.

[0049] Based on this, the embodiments of the present application provide a power management device, a power management method, an electronic device and a storage medium, which are described by embodiments below. Some implementation methods of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0050] Figure 1 A structural schematic diagram of a control device provided in an embodiment of the present application is shown. The power management device in the embodiment of the present application acts on a target vehicle, and the power management device includes: a high-voltage power supply module, a low-voltage power supply module, a motor controller, a power distribution unit, a conversion circuit and a low-voltage load; the high-voltage power supply module is connected to the low-voltage load through the conversion circuit; the low-voltage power supply module is connected to the motor controller, and the low-voltage power supply module is connected to the low-voltage load; the motor controller includes an emergency power supply; the emergency power supply is connected to the high-voltage power supply module through the power distribution unit.

[0051] The electric energy of the emergency power supply in the prior art can only be provided inside the motor controller, that is, the emergency power supply in the prior art does not consider the low-voltage power supply module and low-voltage load outside the motor controller, and its function is limited. The power management device in the embodiment of the present application can not only supply power to the motor controller, but also supply power to the low-voltage power supply module and low-voltage load outside the motor controller. The function of the power management module in the embodiment of the present application is specifically reflected in two aspects: the target vehicle driving process and the target vehicle stopping process (engine off state), specifically including:

[0052] During the driving process of the target vehicle, the high-voltage power supply module is used to provide electric energy to the motor controller, the low-voltage load and the low-voltage power supply module through the conversion circuit; the low-voltage power supply module is used to power the motor controller; the emergency power supply is used to power the motor controller when the low-voltage power supply module is abnormal;

[0053] During the stopping process of the target vehicle, the high-voltage power supply module is used to supply power to the emergency power supply through the power distribution unit; when the low-voltage load does not reach a preset power consumption threshold, the emergency power supply is used to provide power to the motor controller, the low-voltage load and the low-voltage power supply module respectively; when the low-voltage load reaches a preset power consumption threshold, the high-voltage power supply module is used to provide power to the low-voltage load and the low-voltage power supply module respectively through the conversion circuit.

[0054] During the specific implementation, the high-voltage power supply module here can select a high-voltage battery pack (RESS), which generally has two specifications of 400V or 800V. The power distribution unit (PDU) serves as a connection unit between the RESS and other high-voltage electrical equipment. Motor controller: The target vehicle power control device, which will use high-voltage electricity and low-voltage electricity at the same time. The low-voltage loads here include entertainment systems: large screens, audio, massage chairs, etc.; camera systems: front and rear cameras, etc. The low-voltage power supply module can select a lead-acid battery: a small battery for the vehicle, used to power the 12V system. In other words, the high-voltage power supply module in the embodiment of the present application provides a high voltage of 400V or 800V, and the low-voltage power supply module provides a low voltage of 12V. Conversion circuit (DC-DC): Converts high-voltage electricity into low-voltage 12V electricity, generally capable of 1-4KW.

[0055] Further, such as Figure 2 As shown, the motor controller further includes: a valve circuit, a drive module and a control module; the emergency power supply is connected to one end of the valve circuit, and the other end of the valve circuit is connected to the low-voltage power supply module and the low-voltage load; the emergency power supply is also connected to the drive module, and the drive module is connected to the control module;

[0056] The emergency power supply is used to supply power to the drive module; the drive module is used to supply the received power to the control module;

[0057] During the driving process of the target vehicle, the valve circuit is used to detect the state of the low-voltage power supply module, and when the low-voltage power supply module is abnormal, cut off the connection between the emergency power supply and the low-voltage load and the low-voltage power supply module, so that the emergency power supply is only used to power the drive module.

[0058] In the specific implementation, the valve circuit: can sense the state of the lead-acid battery, and when the lead-acid battery fails, cut off the external power supply of the emergency power supply to ensure that the emergency power supply meets the power supply requirements of the motor controller. The control module (such as a single-chip microcomputer): integrates the motor control algorithm. Generally speaking, the control module is powered by the lead-acid battery.

[0059] Further, the valve circuit includes an execution circuit and a detection circuit;

[0060] The detection circuit is used to detect the state of the low-voltage power supply module;

[0061] The execution circuit is used to cut off the connection between the emergency power supply and the low-voltage load and the low-voltage power supply module.

[0062] like Figure 3 As shown, the detection circuit comprises: a comparator (U1) and a first diode (D1); the cathode of the first diode (D1) is connected to the low-voltage power supply module, and the anode of the first diode (D1) is connected to the first input end of the comparator (U1); the second input end of the comparator (U1) is connected to a preset first voltage (generally set to 10V); the cathode of the first diode is also connected to the execution circuit; and the output end of the comparator (U1) is connected to the execution circuit.

[0063] When the low-voltage power supply module is in a normal state, the comparator (U1) outputs a low level so that the execution circuit maintains the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module;

[0064] When the low-voltage power supply module is in an abnormal state, the comparator (U1) outputs a high level to enable the execution circuit to cut off the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module.

[0065] The execution circuit comprises: a first MOS tube (Q1), a first resistor (R1), a second resistor (R2), a third resistor (R3), a first MOS tube (Q2), a second diode (D2) and a third diode (D3);

[0066] The drain of the first MOS transistor (Q1) is connected to the detection circuit, the source of the first MOS transistor (Q1) is connected to the emergency power supply, the source of the first MOS transistor (Q1) is connected to the drain of the first MOS transistor (Q2) through the first resistor (R1) and the second resistor (R2), and the gate of the first MOS transistor (Q1) is connected between the first resistor (R1) and the second resistor (R2); the source of the first MOS transistor (Q2) is grounded, the gate of the first MOS transistor (Q2) is connected to one end of the first resistor (R3), the other end of the first resistor (R3) is connected to a preset second voltage (generally set to 5V), the gate of the first MOS transistor (Q2) is also connected to the positive electrode of the third diode (D3), and the negative electrode of the third diode (D3) is connected to the output end of the control module; the gate of the first MOS transistor (Q2) is also connected to the positive electrode of the second diode (D2), and the negative electrode of the second diode (D2) is connected to the detection circuit; the input end of the control module is also connected between the detection circuit and the negative electrode of the second diode (D2).

[0067] When the detection circuit outputs a high voltage or the control module outputs a high voltage, the first MOS tube (Q1) is in a cut-off state, cutting off the connection between the emergency power supply and the low-voltage load providing power and the low-voltage power supply module;

[0068] When the detection circuit outputs a low voltage, the first MOS tube (Q1) is in a conducting state, maintaining the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module.

[0069] In a specific implementation, a comparator (U1) and a first diode (D1); the cathode of the first diode (D1) is connected to the low-voltage power supply module, and the anode of the first diode (D1) is connected to the first input end of the comparator (U1); the second input end of the comparator (U1) is connected to a preset first voltage; the cathode of the first diode is also connected to the execution circuit; and the output end of the comparator (U1) is connected to the cathode of the second diode (D2).

[0070] The drain of the first MOS tube (Q1) is connected to the detection circuit, the source of the first MOS tube (Q1) is connected to the emergency power supply, the source of the first MOS tube (Q1) is connected to the drain of the first MOS tube (Q2) through the first resistor (R1) and the second resistor (R2), and the gate of the first MOS tube (Q1) is connected between the first resistor (R1) and the second resistor (R2); the source of the first MOS tube (Q2) is grounded, and the gate of the first MOS tube (Q2) is connected to one end of the first resistor (R3). The first MOS tube (Q2) is connected to an output terminal of the comparator (U1), the other end of the first resistor (R3) is connected to a preset second voltage, the gate of the first MOS tube (Q2) is also connected to the positive electrode of the third diode (D3), and the negative electrode of the third diode (D3) is connected to the output terminal of the control module; the gate of the first MOS tube (Q2) is also connected to the positive electrode of the second diode (D2), and the negative electrode of the second diode (D2) is connected to the output terminal of the comparator (U1); and the input terminal of the control module is also connected between the output terminal of the comparator (U1) and the negative electrode of the second diode (D2).

[0071] Among them, Q1, R1, R2, Q2, D3, and D2 form a valve execution circuit. When the control module output or U1 output is low, Q1 is closed, otherwise Q1 is open. U1, D1, and REF_10V form a detection circuit. When the emergency power supply output is pulled down to below 10V by the external circuit (usually occurs when the lead-acid battery fails), D2 quickly pulls down the pole of Q2, thereby cutting off Q1. When the microcontroller input detects a lead-acid battery event, it will keep the microcontroller output low voltage until the next driving cycle begins.

[0072] KL15 (vehicle key signal), after power off, it means the vehicle is turned off. After the vehicle is turned off, most electrical devices will enter a dormant state. The 12V power consumption is calculated by the total number of online devices in the communication. When the total power consumption is less than 70W, the DC-DC is turned off. The consumed power is provided by the emergency power supply of the motor controller.

[0073] Figure 4 A flow chart of a power management method provided by an embodiment of the present application is shown, the method is applied to a power management device, the power management device acts on a target vehicle, the power management device comprises: a high-voltage power module, a low-voltage power module, a motor controller, a power distribution unit, a conversion circuit and a low-voltage load; the high-voltage power module is connected to the low-voltage load through the conversion circuit; the low-voltage power module is connected to the motor controller, and the low-voltage power module is connected to the low-voltage load; the motor controller comprises an emergency power supply; the emergency power supply is connected to the high-voltage power module through the power distribution unit;

[0074] The method includes steps S101-S102; specifically:

[0075] S101, during the driving of the target vehicle, the high-voltage power supply module provides electric energy to the motor controller and the low-voltage load and supplies power to the low-voltage power supply module through the conversion circuit; the low-voltage power supply module supplies power to the motor controller; and the emergency power supply supplies power to the motor controller when the low-voltage power supply module is abnormal;

[0076] S102. During the stopping process of the target vehicle, the high-voltage power supply module supplies power to the emergency power supply through the power distribution unit; when the low-voltage load does not reach a preset power consumption threshold, the emergency power supply provides power to the motor controller, the low-voltage load and the low-voltage power supply module respectively; when the low-voltage load reaches a preset power consumption threshold, the high-voltage power supply module provides power to the low-voltage load and the low-voltage power supply module respectively through the conversion circuit.

[0077] The motor controller further comprises: a valve circuit, a drive module and a control module; the emergency power supply is connected to one end of the valve circuit, and the other end of the valve circuit is connected to the low-voltage power supply module and the low-voltage load; the emergency power supply is also connected to the drive module, and the drive module is connected to the control module;

[0078] The emergency power supply supplies power to the driving module; the driving module supplies the received power to the control module.

[0079] During the driving of the target vehicle, the valve circuit detects the state of the low-voltage power supply module, and when the low-voltage power supply module is abnormal, cuts off the connection between the emergency power supply and the low-voltage load and the low-voltage power supply module, so that the emergency power supply is only used to power the drive module.

[0080] The valve circuit includes an execution circuit and a detection circuit;

[0081] The detection circuit detects the state of the low voltage power supply module;

[0082] The execution circuit cuts off the connection between the emergency power supply and the low-voltage load and the low-voltage power supply module.

[0083] The detection circuit includes: a comparator and a first diode; the cathode of the first diode is connected to the low-voltage power supply module, and the anode of the first diode is connected to the first input terminal of the comparator; the second input terminal of the comparator is connected to a preset first voltage; the cathode of the first diode is also connected to the execution circuit; and the output terminal of the comparator is connected to the execution circuit.

[0084] When the low-voltage power supply module is in a normal state, the comparator outputs a low level so that the execution circuit maintains the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module;

[0085] When the low-voltage power supply module is in an abnormal state, the comparator outputs a high level to enable the execution circuit to cut off the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module.

[0086] The execution circuit comprises: a first MOS tube, a first resistor, a second resistor, a third resistor, a second MOS tube, a second diode and a third diode;

[0087] The drain of the first MOS tube is connected to the detection circuit, the source of the first MOS tube is connected to the emergency power supply, the source of the first MOS tube is connected to the drain of the second MOS tube through the first resistor and the second resistor, and the gate of the first MOS tube is connected between the first resistor and the second resistor; the source of the second MOS tube is grounded, the gate of the second MOS tube is connected to one end of the third resistor, the other end of the third resistor is connected to a preset second voltage, the gate of the second MOS tube is also connected to the positive electrode of the third diode, and the negative electrode of the third diode is connected to the output end of the control module; the gate of the second MOS tube is also connected to the positive electrode of the second diode, and the negative electrode of the second diode is connected to the detection circuit; the input end of the control module is also connected between the detection circuit and the negative electrode of the second diode.

[0088] When the detection circuit outputs a high voltage or the control module outputs a high voltage, the first MOS tube is in a cut-off state, cutting off the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module;

[0089] When the detection circuit outputs a low voltage, the first MOS tube is in a conducting state, maintaining the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module.

[0090] like Figure 5 As shown, an embodiment of the present application provides an electronic device for executing the power management method in the present application, the device includes a memory, a processor, a bus, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the power management method when executing the computer program.

[0091] Specifically, the above-mentioned memory and processor may be general-purpose memory and processor, which are not specifically limited here. When the processor runs the computer program stored in the memory, the above-mentioned power management method can be executed.

[0092] Corresponding to the power management method in the present application, an embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned power management method are executed.

[0093] Specifically, the storage medium can be a general storage medium, such as a mobile disk, a hard disk, etc. When the computer program on the storage medium is run, the above-mentioned power management method can be executed.

[0094] In the embodiments provided in the present application, it should be understood that the disclosed systems and methods can be implemented in other ways. The system embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of systems or units, which can be electrical, mechanical or other forms.

[0095] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0096] In addition, each functional unit in the embodiments provided in the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0097] If the functions are implemented in the form of 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 the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0098] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and are not to be understood as indicating or implying relative importance.

[0099] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application. They should all be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A power management device, characterized in that: The power management device acts on the target vehicle, and the power management device includes: a high-voltage power module, a low-voltage power module, a motor controller, a power distribution unit, a conversion circuit and a low-voltage load; the high-voltage power module is connected to the low-voltage load through the conversion circuit; the low-voltage power module is connected to the motor controller, and the low-voltage power module is connected to the low-voltage load; the motor controller includes an emergency power supply; the emergency power supply is connected to the high-voltage power module through the power distribution unit; During the driving of the target vehicle, the high-voltage power supply module is used to provide electric energy to the motor controller and the low-voltage load and power the low-voltage power supply module through the conversion circuit; The low-voltage power supply module is used to supply power to the motor controller; The emergency power supply is used to supply power to the motor controller when the low-voltage power supply module is abnormal; During the stopping process of the target vehicle, the high-voltage power supply module is used to supply power to the emergency power supply through the power distribution unit; When the low-voltage load does not reach the preset power consumption threshold, the emergency power supply is used to provide power to the motor controller, the low-voltage load and the low-voltage power supply module respectively; When the low-voltage load reaches a preset power consumption threshold, the high-voltage power supply module is used to provide electrical energy to the low-voltage load and power to the low-voltage power supply module through the conversion circuit.

2. The power management device according to claim 1, characterized in that: The motor controller further comprises: a valve circuit, a drive module and a control module; the emergency power supply is connected to one end of the valve circuit, and the other end of the valve circuit is connected to the low-voltage power supply module and the low-voltage load; the emergency power supply is also connected to the drive module, and the drive module is connected to the control module; The emergency power supply is used to supply power to the drive module; the drive module is used to supply the received power to the control module; During the driving process of the target vehicle, the valve circuit is used to detect the state of the low-voltage power supply module, and when the low-voltage power supply module is abnormal, cut off the connection between the emergency power supply and the low-voltage load and the low-voltage power supply module, so that the emergency power supply is only used to power the drive module.

3. The power management device according to claim 2, characterized in that: The valve circuit includes an execution circuit and a detection circuit; The detection circuit is used to detect the state of the low-voltage power supply module; The execution circuit is used to cut off the connection between the emergency power supply and the low-voltage load and the low-voltage power supply module.

4. The power management device according to claim 3, characterized in that: The detection circuit includes: a comparator and a first diode; the cathode of the first diode is connected to the low-voltage power supply module, and the anode of the first diode is connected to the first input terminal of the comparator; the second input terminal of the comparator is connected to a preset first voltage; the cathode of the first diode is also connected to the execution circuit; and the output terminal of the comparator is connected to the execution circuit.

5. The power management device according to claim 4, characterized in that: When the low-voltage power supply module is in a normal state, the comparator outputs a low level so that the execution circuit maintains the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module; When the low-voltage power supply module is in an abnormal state, the comparator outputs a high level to enable the execution circuit to cut off the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module.

6. The power management device according to claim 3, characterized in that: The execution circuit comprises: a first MOS tube, a first resistor, a second resistor, a third resistor, a second MOS tube, a second diode and a third diode; The drain of the first MOS tube is connected to the detection circuit, the source of the first MOS tube is connected to the emergency power supply, the source of the first MOS tube is connected to the drain of the second MOS tube through the first resistor and the second resistor, and the gate of the first MOS tube is connected between the first resistor and the second resistor; the source of the second MOS tube is grounded, the gate of the second MOS tube is connected to one end of the third resistor, the other end of the third resistor is connected to a preset second voltage, the gate of the second MOS tube is also connected to the positive electrode of the third diode, and the negative electrode of the third diode is connected to the output end of the control module; the gate of the second MOS tube is also connected to the positive electrode of the second diode, and the negative electrode of the second diode is connected to the detection circuit; the input end of the control module is also connected between the detection circuit and the negative electrode of the second diode.

7. The power management device according to claim 6, characterized in that: When the detection circuit outputs a high voltage or the control module outputs a high voltage, the first MOS tube is in a cut-off state, cutting off the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module; When the detection circuit outputs a low voltage, the first MOS tube is in a conducting state, maintaining the connection between the emergency power supply and the low-voltage load to provide power and the low-voltage power supply module.

8. A power management method, characterized in that: Applied to a power management device, the power management device acts on a target vehicle, the power management device comprises: a high-voltage power module, a low-voltage power module, a motor controller, a power distribution unit, a conversion circuit and a low-voltage load; the high-voltage power module is connected to the low-voltage load through the conversion circuit; the low-voltage power module is connected to the motor controller, and the low-voltage power module is connected to the low-voltage load; the motor controller comprises an emergency power supply; the emergency power supply is connected to the high-voltage power module through the power distribution unit, and the method comprises: During the driving of the target vehicle, the high-voltage power supply module provides electric energy to the motor controller and the low-voltage load and supplies power to the low-voltage power supply module through the conversion circuit; The low voltage power supply module supplies power to the motor controller; The emergency power supply supplies power to the motor controller when the low-voltage power supply module is abnormal; During the stopping process of the target vehicle, the high voltage power supply module supplies power to the emergency power supply through the power distribution unit; When the low-voltage load does not reach the preset power consumption threshold, the emergency power supply provides power to the motor controller, the low-voltage load and the low-voltage power supply module respectively; When the low-voltage load reaches a preset power consumption threshold, the high-voltage power supply module provides electrical energy to the low-voltage load and supplies power to the low-voltage power supply module through the conversion circuit.

9. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate via the bus, and when the machine-readable instructions are executed by the processor, the steps of the power management method as described in claim 8 are performed.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the power management method as claimed in claim 8 are executed.

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