Energy management method and device, vehicle and storage medium

Abstract

The invention discloses an energy management method and device, a vehicle and a storage medium, relates to the technical field of vehicles, and aims to solve the problem that an energy storage unit is easily overcharged during energy recovery. The energy management method comprises the steps of obtaining working parameters of a motor driving system, wherein the motor driving system comprises a motor, an energy storage unit and a DC-DC converter; wherein one end of the DC-DC converter is connected with the motor, and the other end is connected with the energy storage unit; and controlling the working mode of the DC-DC converter based on the working parameters of the motor driving system.

Description

Technical Field

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

[0002] As a power source for electrical appliances or various machines, the main function of the motor is to generate driving torque, convert electrical energy into mechanical energy, and provide power for various applications. Batteries, as energy suppliers, convert chemical energy into electrical energy, and motors, as energy conversion devices, convert electrical energy into mechanical energy.

[0003] However, in actual applications, when the motor is braking, there is excess energy in the circuit connecting the battery and the motor, and this energy cannot be recovered, which may damage the motor and the battery.

[0004] In the related art, the battery is directly connected to the motor, and the output voltage of the power source is changed by switching the power source, that is, switching the power battery and the storage battery during the motor operation. By setting two power sources to directly recover the excess energy in the circuit composed of the battery and the motor, this method cannot control the current in the circuit composed of the battery and the motor, which will cause the battery to be overcharged and affect the battery performance. Summary of the invention

[0005] The purpose of the present application is to provide an energy management method, device, vehicle and storage medium, aiming to solve the problem that energy storage units are easily overcharged when recovering energy.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides an energy management method, comprising: obtaining operating parameters of a motor drive system, the motor drive system comprising a motor, an energy storage unit and a DC-DC converter; wherein one end of the DC-DC converter is connected to the motor and the other end is connected to the energy storage unit; based on the operating parameters of the motor drive system, controlling the operating mode of the DC-DC converter.

[0008] The energy management method provided in the embodiment of the present application adds a DC-DC converter between the energy storage unit and the motor, and by controlling the working mode of the DC-DC converter, the DC-DC converter can perform voltage conversion between the energy storage unit and the motor, so that the motor can work in the optimal voltage range under different working conditions. At the same time, when there is excess energy in the motor drive system, the DC-DC converter adjusts the electric energy output by the motor to a suitable voltage to match the charging voltage range of the energy storage unit, which not only realizes the recovery of excess electric energy, but also prevents the energy storage unit from being overcharged or damaged due to excessive charging voltage.

[0009] In some embodiments, the working modes of the above-mentioned DC-DC converter include power supply mode, charging mode and idle mode; wherein, the power supply mode is used to use the energy storage unit to power the motor; the charging mode is used to use the motor to charge the energy storage unit; the idle mode is when the DC-DC converter is in a non-working state.

[0010] In some embodiments, controlling the working mode of the DC-DC converter based on the working parameters of the motor drive system includes: controlling the DC-DC converter to be in the power supply mode when the working parameters of the motor drive system meet the power supply mode operating conditions.

[0011] In some embodiments, the operating parameters of the motor drive system include the current of the motor drive system; and the power supply mode operating conditions include: the current of the motor drive system is greater than a current threshold.

[0012] In some embodiments, the operating parameters of the motor drive system include the bus voltage of the motor; the power supply mode operating conditions include: the bus voltage of the motor is less than a voltage threshold.

[0013] In some embodiments, controlling the operating mode of the DC-DC converter based on the operating parameters of the motor drive system includes: controlling the DC-DC converter to be in charging mode when the operating parameters of the motor drive system meet the charging mode operating conditions.

[0014] In some embodiments, the operating parameters of the motor drive system include the current of the motor drive system; and the charging mode operating conditions include: the current of the motor drive system is less than a current threshold.

[0015] In some embodiments, the operating parameters of the motor drive system include the bus voltage of the motor; and the charging mode operating condition includes: when the bus voltage of the motor is greater than a voltage threshold.

[0016] In some embodiments, the above charging mode operating condition also includes: the motor is in a braking state.

[0017] In some embodiments, controlling the operating mode of the DC-DC converter based on the operating parameters of the motor drive system includes: controlling the DC-DC converter to be in idle mode when the operating parameters of the motor drive system meet idle mode operating conditions.

[0018] In some embodiments, the operating parameters of the motor drive system include the current of the motor drive system; and the idle mode operating condition includes: the current of the motor drive system is equal to a current threshold.

[0019] In some embodiments, the operating parameters of the motor drive system include the temperature of the DC-DC converter; and the idle mode operating condition includes: the temperature of the DC-DC converter is greater than a temperature threshold.

[0020] In some embodiments, the motor comprises a motor in a winch system.

[0021] In the second aspect, the present application provides an energy management device, including: an acquisition unit, used to acquire the operating parameters of a motor drive system, the motor drive system including a motor, an energy storage unit and a DC-DC converter; wherein one end of the DC-DC converter is connected to the motor, and the other end is connected to the energy storage unit; a processing unit, used to control the operating mode of the DC-DC converter based on the operating parameters of the motor drive system.

[0022] In a third aspect, the present application provides an electronic device comprising: a processor and a memory configured to store processor executable instructions; wherein the processor is configured to execute the instructions to implement any one of the optional energy management methods in the first aspect above.

[0023] In a fourth aspect, the present application provides a computer-readable storage medium having instructions stored thereon. When the instructions in the computer-readable storage medium are executed by a device, the device is enabled to execute any one of the optional energy management methods in the first aspect described above.

[0024] In a fifth aspect, the present application provides a vehicle, comprising: the electronic device of the third aspect above, or the computer-readable storage medium of the fourth aspect.

[0025] In a sixth aspect, the present application provides a computer program product, which includes computer instructions. When the computer instructions are executed on a processor of a device, the device is enabled to execute any optional energy management method as described in the first aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a structural schematic diagram of a high-voltage winch system in the related art;

[0028] Figure 2 A schematic flow chart of a control method for a high-voltage winch system in the related art;

[0029] Figure 3 A schematic diagram of the structure of a motor drive system provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of the structure of another motor drive system provided in an embodiment of the present application;

[0031] Figure 5 A schematic diagram of a flow chart of an energy management method provided in an embodiment of the present application;

[0032] Figure 6 A circuit structure diagram of a motor drive system provided in an embodiment of the present application;

[0033] Figure 7 A flowchart of another energy management method provided in an embodiment of the present application;

[0034] Figure 8 A flowchart of another energy management method provided in an embodiment of the present application;

[0035] Fig. 9 A flowchart of another energy management method provided in an embodiment of the present application;

[0036] Fig.10 A flow chart of a method for controlling a winch motor provided in an embodiment of the present application;

[0037] Fig.11 A schematic flow chart of a control method for a bidirectional DC-DC converter provided in an embodiment of the present application;

[0038] Fig.12 A schematic diagram of the structure of an energy management device provided in an embodiment of the present application;

[0039] Fig.13 A schematic diagram of the structure of a device provided in an embodiment of the present application.

[0040] Reference numerals:

[0041] Motor drive system 300; motor 310; energy storage unit 320; DC-DC converter 330; control module 340; inverter 350; display module 360; first DC-DC converter 331; second DC-DC converter 332; domain controller 400; converter control unit 410; winch control unit 420; winch control switch 430; storage unit 440; display unit 450; power supply controller 411; first state feedback module 412; winch controller 421; second state feedback module 422;

[0042] Power battery S; first switch tube Q1; second switch tube Q2; third switch tube Q3; fourth switch tube Q4; first diode D1; second diode D2; third diode D3; fourth diode D4; capacitor C; first inductor L1; second inductor L2; third inductor L3; motor R. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. Unless otherwise specified, the above-mentioned directional description can be flexibly set in the process of actual application under the condition that the relative positional relationship shown in the accompanying drawings is met.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0046] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In the present application, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, article or device including the element.

[0048] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0049] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0050] As a power source for electrical appliances or various machines, the main function of the motor is to generate driving torque, convert electrical energy into mechanical energy, and provide power for various applications. Batteries, as energy suppliers, convert chemical energy into electrical energy, and motors, as energy conversion devices, convert electrical energy into mechanical energy.

[0051] However, in actual applications, when the motor is braking, there is excess energy in the circuit connecting the battery and the motor, and this energy cannot be recovered, which may damage the motor and the battery.

[0052] It should be understood that for ease of description, the embodiment of the present application takes a winch motor as an example, but this description method does not constitute a limitation. In actual applications, the type of motor can be determined according to needs.

[0053] In the related art, a high-voltage winch system using a hybrid electric vehicle architecture is proposed. The invention uses an auxiliary battery (storage battery) to power the electrical system accessories and a traction battery (power battery) to provide power for the winch. The winch motor is controlled by a designed winch controller and torque sensor. The controller is configured to initiate power transmission from the auxiliary battery to the motor in response to the motor's requested torque being less than a threshold, otherwise initiate power transmission from the traction battery to the motor.

[0054] like Figure 1As shown, the high voltage winch system is suitable for a vehicle 102, including: an electric machine 104, a traction battery 106, an engine 108, a transmission 112, and a hybrid powertrain controller 110. The transmission 112 is connected to a differential 126 via a corresponding output shaft, and the drive wheels 114 are connected to the differential 126 through corresponding axles 128. The battery controller 118 can be configured to monitor and control the operation of the traction battery 106. The electric vehicle service equipment 134 can have a charging connector for insertion into a charging connector 136 of the vehicle 102, such as via a connector pin that mates with a corresponding groove of the charging connector 136. The charging connector 136 can be electrically connected to an on-board charger 138.

[0055] The traction battery 106 may be configured to provide energy to a low voltage DC power source that is compatible with other electrical loads of the vehicle 102. A DC / DC converter 120 may be connected between a low voltage connection 122 used by one or more low voltage subsystems or components and a high voltage connection 124 used by, for example, the motor 104 and the traction battery 106. A low voltage bus may be an electrical bus that connects together one or more low voltage connection 122 components, such as, but not limited to, an accessory load power source 130 and an accessory load 132. The accessory load power source 130 connected to the low voltage connection 122 may be configured to provide energy to an accessory load 132, such as, but not limited to, cabin and propulsion system climate control, cabin lighting, vehicle audio system, and the like.

[0056] like Figure 2 As shown, the control process of the high-voltage winch can be: 202. Receive a request to activate the high-voltage winch. 204. Determine whether the requested torque is greater than a threshold. If so, execute 206. If not, execute 208. 206. Issue an alarm notification and prevent the activation of the high-voltage winch. 208. Whether the high-voltage battery SOC is greater than a threshold. If so, execute 210. If not, execute 206. 210. Activate the high-voltage winch using the high-voltage battery.

[0057] The control process of the high-voltage winch can also be: 212. Receive a request to activate the high-voltage winch. 214. Determine whether the requested torque is greater than a threshold. If so, execute 218. If not, execute 216. 216. Use the low-voltage battery to activate the high-voltage winch. 218. Whether the high-voltage battery SOC is greater than a threshold. If so, execute 220. If not, execute 216. 220. Use the high-voltage battery to activate the high-voltage winch.

[0058] However, the above-mentioned high-voltage winch system 100 directly connects the battery to the motor, and changes the output voltage of the power source by switching the power source, that is, switching the power battery and the storage battery during the motor operation. By setting two power sources to directly recover the excess energy in the circuit composed of the battery and the motor, this method cannot control the magnitude of the current in the circuit composed of the battery and the motor, which may cause overcharging of the battery. At the same time, during high-speed braking, the back electromotive force generated by the motor may be higher than the supply voltage, damaging the battery.

[0059] Based on this, the present application proposes an energy management method, including: obtaining the working parameters of the motor drive system, the motor drive system includes a motor, an energy storage unit and a DC-DC converter; wherein one end of the DC-DC converter is connected to the motor, and the other end is connected to the energy storage unit; based on the working parameters of the motor drive system, the working mode of the DC-DC converter is controlled. A DC-DC converter is added between the energy storage unit and the motor, and by controlling the working mode of the DC-DC converter, the DC-DC converter can perform voltage conversion between the energy storage unit and the motor, so that the motor can operate in the optimal voltage range under different working conditions. At the same time, when there is excess energy in the motor drive system, the DC-DC converter adjusts the electric energy output by the motor to a suitable voltage to match the charging voltage range of the energy storage unit, thereby realizing the recovery of excess electric energy.

[0060] The energy management method of an article provided in the embodiment of the present application can be applied to Figure 3 The motor drive system shown in Figure 1 is Figure 3 As shown, the motor drive system 300 includes: a motor 310, an energy storage unit 320 and a DC-DC converter 330. The energy storage unit 320 provides energy for the motor drive system 300, and the DC-DC converter 330 converts the voltage provided by the energy storage unit 320 into an optimal range for the motor to operate.

[0061] The energy storage unit 320 is any rechargeable battery, such as an energy storage system. The DC-DC converter can be a bidirectional DC-DC converter that can increase or decrease the voltage input to the motor 310 when the energy storage unit 320 supplies power to the motor 310, and can also increase or decrease the voltage input to the energy storage unit 320 when charging the energy storage unit 320.

[0062] like Figure 3As shown, the motor drive system 300 further includes: a control module 340, an inverter 350 and a display module 360. The control module 340 is used to control the operation of each module in the motor drive system 300. The inverter 350 is used to convert the DC voltage input by the DC-DC converter 330 into AC power and supply power to the motor 310. The display module 360 ​​is used to display parameters such as temperature and pressure of the motor 310 and the DC-DC converter 330.

[0063] In some embodiments, the DC-DC converter 330 includes two parts, namely a first DC-DC converter 331 and a second DC-DC converter 332. The first DC-DC converter 331 is used to increase or decrease the voltage input to the motor 310, and the second DC-DC converter 332 is used to provide a stable voltage to the display module 360.

[0064] It should be noted that the control module can be any device with computing capabilities. In this letter, the control module is taken as a domain controller as an example. The domain controller here can specifically be a power domain controller in the vehicle, which is used to control the power system of the vehicle.

[0065] In some embodiments, reference Figure 3 and Figure 4 The control module 340 may be a domain controller 400, the motor 310 may be a winch motor, and the specific structure of the control module 340 may be as follows Figure 4 As shown, the domain controller 400 includes: a converter control unit 410 and a winch control unit 420 , wherein the converter control unit 410 is used to control the DC-DC converter 330 , and the winch control unit 420 is used to control the winch motor 310 .

[0066] The converter control unit 410 includes: a power controller 411 and a first state feedback module 412. The power controller 411 is used to control the working mode of the DC-DC converter 330 according to the instructions of the domain controller 400 or the information of the energy storage unit 320 or the instructions of the winch controller 421, and the first state feedback module 412 is used to monitor the operating parameters such as voltage, temperature and current of the DC-DC converter 330. These operating parameters are fed back to the domain controller 400, and the domain controller 400 controls the power controller 411 and the winch controller 421 according to the operating parameters fed back by the first state feedback module 412.

[0067] The winch control unit 420 includes: a winch controller 421 and a second state feedback module 422. The power controller 411 is used to control the winch motor 310 to work, stop or adjust the speed according to the instructions of the domain controller 400 or the instructions of the power controller 421, and the second state feedback module 422 is used to monitor the operating parameters such as the temperature and load of the winch motor 310. These operating parameters are fed back to the domain controller 400, and the domain controller 400 controls the power controller 411 and the winch controller 421 according to the operating parameters fed back by the second state feedback module 422.

[0068] In some embodiments, the control module 340 further includes: a winch control switch 430, a storage unit 440 and a display unit 450. The winch control switch 430 is used to control the on or off of the winch motor, the storage unit 440 is used to store the voltage, temperature and current and other operating parameters of the DC-DC converter 330 fed back by the first state feedback module 412 and the temperature and load and other operating parameters of the winch motor 310 fed back by the second state feedback module 422, and the display unit 450 is used to control the load condition, over-temperature, under-voltage and other states of the winch motor 310 to be displayed on the display module 360.

[0069] It should be noted that the motor drive system 300 also includes one or more temperature sensors, current sensors, voltage sensors, etc. These devices are used to detect the temperature, voltage, current and other operating parameters of the winch motor 310 and the DC-DC converter 330. The models of these devices and their installation locations in the motor drive system 300 are not specifically limited here.

[0070] It should be noted that the energy management method of the article of the present application is applicable to the control module of the above-mentioned motor drive system. Among them, the control module can be a personal computer (PC), a laptop computer, a mobile device, a tablet computer, a laptop computer and other electronic devices, and the embodiments of the present application do not limit the specific form of the electronic device. Alternatively, the control module can also be a separate server, or a server cluster composed of multiple servers. In some implementations, the server cluster can be a distributed cluster server. The embodiments of the present application do not impose any restrictions on this.

[0071] like Figure 5 As shown, the energy management method provided in the embodiment of the present application includes:

[0072] S501. Obtain operating parameters of the motor drive system.

[0073] The motor drive system includes a motor, an energy storage unit, and a DC-DC converter. One end of the DC-DC converter is connected to the motor, and the other end is connected to the energy storage unit. The specific working principle and process of the motor drive system can be referred to above. Figure 3 The description is omitted here.

[0074] In some embodiments, the operating parameters of the motor drive system include: voltage, current and temperature of the motor, and temperature of the DC-DC converter.

[0075] It should be noted that the voltage and current of the motor are different when the motor is in different states. At the same time, the working parameters of the motor drive system also reflect the working state of the motor, that is, the working state of the motor and the DC-DC converter can be judged by the size of the working parameters, or whether the motor and the DC-DC converter are abnormal.

[0076] It should be understood that the current of the motor drive system and the current flowing through the motor mentioned in the embodiments of the present application both represent the current on the motor bus, and the voltage of the motor also represents the bus voltage of the motor.

[0077] In some embodiments, the motor drive system includes multiple temperature sensors, current sensors, and voltage sensors. The voltage sensor can detect the voltage of the motor, the current sensor can detect the current in the circuit composed of the energy storage unit, the motor, and the DC-DC converter, and the temperature sensor can obtain the temperature of the motor and the temperature of the DC-DC converter. Each sensor communicates with the control module in the motor drive system and sends the voltage, current, and temperature of the motor and the temperature of the DC-DC converter to the control module.

[0078] S502 : Controlling the working mode of the DC-DC converter based on the working parameters of the motor drive system.

[0079] The working modes of the DC-DC converter include power supply mode, charging mode and idle mode. The power supply mode is used to use the energy storage unit to power the motor, the charging mode is used to use the motor to charge the energy storage unit, and the idle mode is when the DC-DC converter is in a non-working state.

[0080] It is important to understand that the motor's speed, torque, power, efficiency and other parameters jointly determine the motor's operating state and performance. In the motor drive system, these parameters need to be precisely controlled to meet specific application requirements. The motor's speed, torque, power, efficiency and other parameters are determined by controlling the voltage across the motor and the current flowing through the motor. In other words, the motor's operating state can be determined by the motor drive system's operating parameters, and then the DC-DC converter's operating mode can be determined by the motor's operating state.

[0081] Exemplarily, when the DC-DC converter is in the power supply mode, if the voltage of the motor suddenly increases during the operation of the motor, the DC-DC converter is controlled to switch from the power supply mode to the charging mode.

[0082] In some embodiments, the DC-DC converter includes two modes in the power supply mode: a boost mode and a buck mode. The DC-DC converter can adjust the voltage output by the energy storage unit by boosting or bucking so that the voltage at both ends of the motor is within the optimal voltage range of the current working condition of the motor, so that when the motor requires different voltages under different working conditions, the voltage output by the energy storage unit is within the optimal voltage range, which can improve the working efficiency of the motor. At the same time, the DC-DC converter can quickly respond to the control requirements of the motor drive system, provide stable voltage and power support for the motor under different working conditions, and improve the stability of the motor drive system.

[0083] In other embodiments, the DC-DC converter includes two modes in the charging mode: a boost mode and a buck mode. The DC-DC converter can also adjust the excess energy in the circuit composed of the energy storage unit, the motor and the DC-DC converter by boosting or bucking so that the voltage across the energy storage unit matches the charging voltage range of the energy storage unit. The DC-DC converter adjusts the voltage output by the motor to a suitable voltage to match the charging voltage range of the energy storage unit, thereby avoiding overcharging of the energy storage unit and optimizing the working efficiency of the energy storage unit.

[0084] Based on S501-S502, it can be seen that the energy management method of the embodiment of the present application adds a DC-DC converter between the energy storage unit and the motor, and by controlling the working mode of the DC-DC converter, the DC-DC converter can perform voltage conversion between the energy storage unit and the motor, so that the motor can work in the optimal voltage range under different working conditions. At the same time, when there is excess energy in the motor drive system, the DC-DC converter adjusts the electric energy output by the motor to a suitable voltage to match the charging voltage range of the energy storage unit, which not only realizes the recovery of excess electric energy, but also prevents the energy storage unit from being overcharged or damaged due to excessive charging voltage.

[0085] In some embodiments, the motor comprises a motor in a winch system.

[0086] For example, when a vehicle is stuck in mud, sand or other roads, the motor in the winch system is required to convert the vehicle's electrical energy into the tension of the cable to pull the vehicle out of trouble. Different degrees of vehicle sinking require different tensions, and different tensions mean that the operating parameters such as the voltage of the motor in the winch system are different. By controlling the motor in the winch system based on the energy management method of the present application, it is possible to adjust the voltage output by the energy storage unit to the range corresponding to the voltage required by the motor when the motor requires different voltages, thereby improving the working efficiency of the motor.

[0087] At the same time, when the motor in the winch system is in braking and other states, a large amount of energy needs to be recovered in the winch system. By controlling the motor in the winch system based on the energy management method of the present application, the charging voltage of the energy storage unit can be adjusted within an appropriate range to avoid overcharging of the energy storage unit or damage to the energy storage unit due to excessive charging voltage.

[0088] Figure 6 The circuit structure diagram of the motor drive system provided in an embodiment of the present application, the motor drive system includes: a power battery S, a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a fourth switch tube Q4, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a capacitor C, a first inductor L1, a second inductor L2, a third inductor L3, and a motor R.

[0089] When the DC-DC converter is in the power supply mode, when boosting, the first switch tube Q1, the third switch tube Q3 and the fourth switch tube Q4 are turned on, and the second switch tube Q2 is turned off. When reducing the voltage, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 are turned on, and the first switch tube Q1 is turned off. The degree of opening of the third switch tube Q3 and the fourth switch tube Q4 can be determined according to the difference between the voltage required by the motor R and the voltage output by the power battery S.

[0090] When the DC-DC converter is in charging mode, when boosting, the third switch tube Q3, the first switch tube Q1 and the second switch tube Q2 are turned on, and the fourth switch tube Q4 is turned off. When reducing the voltage, the fourth switch tube Q4, the second switch tube Q2 and the first switch tube Q1 are turned on, and the third switch tube Q3 is turned off. The degree of opening of the first switch tube Q1 and the second switch tube Q2 can be determined according to the difference between the voltage required by the power battery S and the voltage output by the motor R.

[0091] When the DC-DC converter is in an idle mode, the first switch tube Q1 , the second switch tube Q2 , the third switch tube Q3 , and the fourth switch tube Q4 are all controlled to be turned off.

[0092] Among them, the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, and the fourth switch tube Q4 can all be insulated gate bipolar transistors (IGBTs), and the gate of each IGBT is connected to a signal source for driving the IGBT, and the voltage output by the energy storage unit or the charging voltage when the energy storage unit is charged is adjusted by controlling the conduction time of the IGBT.

[0093] In some embodiments, Figure 6 As shown, the motor drive system also includes: a temperature acquisition unit, which is used to collect the temperature of the battery S, the temperature of the compressor R, the temperature of the first switch tube Q1, the temperature of the second switch tube Q2, the temperature of the third switch tube Q3, the temperature of the fourth switch tube Q4, the ambient temperature and the temperature of the radiator.

[0094] In some embodiments, Figure 6 As shown, the motor drive system further includes: a current and voltage acquisition unit, which respectively acquires the voltage across the battery S and the current flowing through the battery S, and the voltage across the motor R and the current flowing through the motor R. The domain controller acquires the voltage across the battery S and the current flowing through the battery S, and the voltage across the motor R and the current flowing through the motor R, and controls the on or off of the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, and the fourth switch tube Q4 according to the voltage across the battery S and the current flowing through the battery S, and the voltage across the motor R and the current flowing through the motor R, thereby realizing the switching of the DC-DC converter working mode.

[0095] Among them, the voltage across the battery S and the current flowing through the battery S, the voltage across the motor R and the current flowing through the motor R refer to the bus voltage and the current on the bus.

[0096] In some embodiments, when the energy storage unit is required to supply power to the motor in the motor drive system, the operating parameters of the motor drive system are different from other working conditions. At this time, the DC-DC converter needs to be in the power supply mode. Therefore, it can be determined whether the DC-DC converter can be in the power supply mode by judging whether the operating parameters of the motor drive system meet the power supply mode operating conditions. Figure 7 , the above S502 may include:

[0097] S701 . When the operating parameters of the motor drive system meet the operating conditions of the power supply mode, control the DC-DC converter to be in the power supply mode.

[0098] It should be noted that the DC-DC converter should be in power supply mode when the motor is operating normally, while the operating parameters of the motor drive system are different in different situations such as when the motor is operating normally, during motor braking, and when the motor is abnormal. Therefore, the DC-DC converter can be controlled to be in power supply mode based on whether the operating parameters of the motor drive system meet the operating conditions of the power supply mode.

[0099] As a possible implementation method, the domain controller determines whether the working parameters of the motor drive system meet the power supply mode operating conditions. If the working parameters of the motor drive system meet the power supply mode operating conditions, it indicates that the energy storage unit is required to supply power to the motor. The domain controller can control the DC-DC converter to be in power supply mode.

[0100] Based on S701, it can be seen that by judging whether the working parameters meet the operating conditions of the power supply mode, when the operating conditions of the power supply mode are met, the DC-DC converter is controlled to be in the power supply mode, and the energy storage unit supplies power to the motor. At the same time, the voltage output by the energy storage unit can be adjusted through the DC-DC converter to ensure that the motor can operate in the optimal voltage range under different working conditions.

[0101] In some embodiments, when the operating parameters of the motor drive system include the current of the motor drive system, the above-mentioned power supply mode operating conditions include: the current of the motor drive system is greater than the current threshold. Therefore, it can be determined whether the DC-DC converter needs to be in the power supply mode according to the current of the motor drive system, and when the current of the motor drive system is greater than the current threshold, the DC-DC converter is controlled to be in the power supply mode.

[0102] It should be noted that when the DC-DC converter is in the power supply mode, that is, the energy storage unit needs to supply power to the motor, the current in the motor drive system flows from the energy storage unit to the motor.

[0103] As a possible implementation method, the direction of the current flowing out of the positive pole of the energy storage unit is the positive direction, and the current is greater than 0. The current sensor detects the current of the motor drive system, and the domain controller determines which working mode the DC-DC converter should be in according to the magnitude of the current. When the current of the motor drive system is greater than 0, it indicates that the energy storage unit is supplying power to the motor, and at this time, the DC-DC converter is controlled to be in the power supply mode.

[0104] It can be seen that by judging whether the DC-DC converter needs to be in power supply mode based on the current, when the current is greater than the current threshold, the DC-DC converter is controlled to be in power supply mode, and the energy storage unit supplies power to the motor. At the same time, the voltage output by the energy storage unit can be adjusted through the DC-DC converter to ensure that the motor can operate in the optimal voltage range under different working conditions.

[0105] In some embodiments, the operating parameters of the motor drive system also include the bus voltage of the motor, and the above-mentioned power supply mode operation condition includes: the bus voltage of the motor is less than the voltage threshold. Therefore, it can be determined whether the DC-DC converter needs to be in the power supply mode according to the bus voltage of the motor, and when the bus voltage of the motor is less than the voltage threshold, the DC-DC converter is controlled to be in the power supply mode.

[0106] As a possible implementation method, a voltage sensor detects the bus voltage of the motor. If the bus voltage of the motor is less than the voltage threshold, this indicates that there is no excess energy in the circuit of the motor drive system that needs to be recovered, that is, an energy storage unit is required to power the motor. At this time, the DC-DC converter needs to be in power supply mode.

[0107] It can be seen that by judging whether the DC-DC converter needs to be in the power supply mode according to the voltage, when the voltage is less than the voltage threshold, the DC-DC converter is controlled to be in the power supply mode, and the energy storage unit supplies power to the motor. At the same time, the voltage output by the energy storage unit can be adjusted through the DC-DC converter to ensure that the motor can operate in the optimal voltage range under different working conditions.

[0108] In some embodiments, when there is excess energy in the motor drive system, the operating parameters of the motor drive system are different from other working conditions. At this time, the DC-DC converter needs to be in charging mode. Therefore, it can be determined whether the DC-DC converter can be in charging mode by judging whether the operating parameters of the motor drive system meet the charging mode operating conditions. Figure 8 , the above S502 may include:

[0109] S801 . When the operating parameters of the motor drive system meet the charging mode operating conditions, control the DC-DC converter to be in the charging mode.

[0110] It should be noted that when the operating state of the motor changes, the operating state of the energy storage unit changes accordingly, and different states can be characterized by operating parameters with different values. The DC-DC converter can be controlled to be in charging mode based on whether the operating parameters of the motor drive system meet the charging mode operating conditions.

[0111] As a possible implementation method, the domain controller determines whether the operating parameters of the motor drive system meet the charging mode operating conditions. If the operating parameters of the motor drive system meet the power supply mode operating conditions, it indicates that there is excess energy in the motor drive system that needs to be recovered by the energy storage unit. The domain controller can control the DC-DC converter to be in charging mode.

[0112] Based on S801, it can be seen that by judging whether the working parameters meet the charging mode operating conditions, if the charging mode operating conditions are met, the DC-DC converter is controlled to be in charging mode, and the energy storage unit recovers excess energy in the circuit. At the same time, the charging voltage of the energy storage unit can be adjusted through the DC-DC converter to match the charging voltage range of the energy storage unit, which not only realizes the recovery of excess electric energy, but also avoids the energy storage unit from being overcharged or damaged due to excessive charging voltage.

[0113] In some embodiments, the operating parameters of the motor drive system include the current of the motor drive system, and the charging mode operating condition includes: the current of the motor drive system is less than the current threshold. Therefore, it can be determined whether the DC-DC converter needs to be in the charging mode according to the current of the motor drive system, and when the current of the motor drive system is less than the current threshold, the DC-DC converter is controlled to be in the charging mode.

[0114] It should be noted that when the DC-DC converter is in charging mode, that is, the motor needs to supply power to the energy storage unit, the current in the motor drive system flows from the motor to the energy storage unit.

[0115] As a possible implementation method, the direction of flowing out of the positive pole of the energy storage unit is taken as the positive direction, the current sensor detects the current of the motor drive system, and the domain controller determines the working mode of the DC-DC converter according to the magnitude of the current. When the current of the motor drive system is less than 0, it indicates that the motor is supplying power to the energy storage unit. At this time, the DC-DC converter needs to be in charging mode.

[0116] It can be seen that by judging whether the DC-DC converter needs to be in charging mode based on the current, when the current is less than the current threshold, the DC-DC converter is controlled to be in charging mode, and the energy storage unit recovers excess energy in the circuit. At the same time, the charging voltage of the energy storage unit can be adjusted through the DC-DC converter to match the charging voltage range of the energy storage unit. This not only realizes the recovery of excess electric energy, but also avoids the energy storage unit from being overcharged or damaged due to excessive charging voltage.

[0117] In some embodiments, when the operating parameters of the motor drive system include the bus voltage of the motor, the charging mode operation condition includes: when the bus voltage of the motor is greater than a voltage threshold. Therefore, it can be determined whether the DC-DC converter needs to be in the charging mode according to the bus voltage of the motor, and when the bus voltage of the motor is greater than the voltage threshold, the DC-DC converter is controlled to be in the charging mode.

[0118] It should be noted that when the motor runs at high speed, the bus voltage of the motor will exceed the set voltage of the energy storage unit output. At this time, the energy of the motor needs to be received in the energy storage unit, that is, the DC-DC converter needs to be in charging mode.

[0119] As a possible implementation method, when the DC-DC converter is in charging mode, that is, the motor needs to supply power to the energy storage unit, the voltage across the motor is greater than the voltage output by the DC-DC converter. If the bus voltage of the motor is greater than the voltage threshold, this indicates that there is excess energy in the circuit of the motor drive system that needs to be recovered, that is, the energy storage unit is needed to recover the excess energy in the circuit, and the DC-DC converter needs to be in power supply mode.

[0120] It can be seen that by judging whether the DC-DC converter needs to be in charging mode according to the voltage, when the voltage is greater than the voltage threshold, the DC-DC converter is controlled to be in charging mode, and the energy storage unit recovers excess energy in the circuit. At the same time, the charging voltage of the energy storage unit can be adjusted by the DC-DC converter to match the charging voltage range of the energy storage unit. This not only realizes the recovery of excess electric energy, but also avoids the energy storage unit from being overcharged or damaged due to excessive charging voltage.

[0121] In some embodiments, when the operating parameters of the motor drive system include the running state of the motor, the charging mode operating condition may further include: the motor is in a braking state. Therefore, it may be determined whether the DC-DC converter needs to be in the charging mode according to the running state of the motor, and when the motor is in the braking state, the DC-DC converter is controlled to be in the charging mode.

[0122] It should be understood that when the motor is in a braking state, a back electromotive force will be generated at both ends of the motor, and the voltage at both ends of the motor will exceed the output voltage set by the energy storage unit. In this case, there is energy in the circuit that needs to be recovered, that is, the DC-DC converter needs to be in charging mode so that the energy in the circuit can be absorbed by the energy storage unit.

[0123] As a possible implementation method, when the motor is in a braking state, there will be a braking current inside the motor, and the direction of the braking current is opposite to the direction of motor rotation. By detecting whether there is a braking current in the motor, it is determined whether the motor is in a braking state, and then when the motor is in a braking state, the DC-DC converter is controlled to be in charging mode.

[0124] In some embodiments, since the braking current is proportional to the braking torque, the braking torque can also be used to determine whether the motor is in a braking state.

[0125] It can be seen that by judging whether the DC-DC converter needs to be in charging mode according to the operating state of the motor, when the motor is in a braking state, the DC-DC converter is controlled to be in charging mode, and the energy storage unit recovers excess energy in the circuit. At the same time, the charging voltage of the energy storage unit can be adjusted through the DC-DC converter to match the charging voltage range of the energy storage unit. This not only realizes the recovery of excess electric energy, but also avoids the energy storage unit from being overcharged or damaged due to excessive charging voltage.

[0126] In some embodiments, when an abnormality occurs in the motor or the DC-DC converter, it is necessary to control the DC-DC converter to be in idle mode. The working mode of the DC-DC converter is related to the operating parameters of the motor drive system. It can be determined whether the DC-DC converter can be in idle mode by judging whether the operating parameters of the motor drive system meet the idle mode operating conditions. Fig. 9 , the above S502 may include:

[0127] S901 . When the operating parameters of the motor drive system meet the idle mode operating conditions, control the DC-DC converter to be in the idle mode.

[0128] It should be noted that the operating parameters of the motor drive system are different when the motor is in different states, so the DC-DC converter can be controlled to be in idle mode according to whether the operating parameters of the motor drive system meet the idle mode operating conditions. When an abnormality occurs in the motor, the DC-DC converter can be controlled to be in idle state to cut off the power supply of the motor, thereby protecting the motor.

[0129] Based on S901, it can be seen that by judging whether the working parameters meet the idle mode operating conditions, if the idle mode operating conditions are met, the DC-DC converter is controlled to be in idle mode. Therefore, when an abnormality occurs in the motor, the DC-DC converter can be controlled to be in an idle state to cut off the power supply of the motor, thereby protecting the motor drive system.

[0130] In some embodiments, the operating parameters of the motor drive system include the current of the motor drive system, and the idle mode operating condition includes: the current of the motor drive system is equal to the current threshold. Therefore, it can be determined whether the DC-DC converter needs to be in the idle mode according to the magnitude of the current of the motor drive system, and when the current of the motor drive system is equal to the current threshold, the DC-DC converter is controlled to be in the idle mode.

[0131] It should be noted that when the energy storage unit does not need to supply power to the motor or there is no excess energy absorbed in the circuit, energy does not need to be transferred between the energy storage unit and the motor, and the DC-DC converter may not work.

[0132] As a possible implementation method, the current sensor detects the current of the motor drive system, and the domain controller determines the working mode of the DC-DC converter based on the current. When the current is equal to 0, it indicates that no energy transfer occurs in the motor drive system loop. At this time, the DC-DC converter is controlled to be in idle mode.

[0133] It can be seen that by judging whether the DC-DC converter needs to work based on the current, when the current is equal to the current threshold, the DC-DC converter is controlled to be in idle mode. Therefore, when an abnormality occurs in the motor, the DC-DC converter can be controlled to be in idle state to cut off the power supply of the motor, thereby protecting the motor drive system.

[0134] In some embodiments, when the operating parameters of the motor drive system include the temperature of the DC-DC converter, the idle mode operating condition may include: the temperature of the DC-DC converter is greater than a temperature threshold. Therefore, it is possible to determine whether the DC-DC converter needs to be in the idle mode based on the temperature of the DC-DC converter, and when the temperature of the DC-DC converter is greater than the temperature threshold, the DC-DC converter is controlled to be in the idle mode.

[0135] It should be noted that the DC-DC converter includes multiple switching tubes, and the temperature affects the performance of the switching tubes. When the temperature is high, the failure rate and life of the switching tubes will be affected. When the DC-DC converter is working, the switching tube will generate power loss during operation, causing heat. If the heat cannot be dissipated in time, the junction temperature of the device will exceed 125°C, and the switching tube may be damaged. Therefore, it is necessary to turn off the switching tube in the DC-DC converter when the temperature of the DC-DC converter is too high, that is, to control the DC-DC converter to be in idle mode.

[0136] As a possible implementation method, the temperature sensor detects the temperature of each switch tube. The domain controller detects the temperature of each switch tube based on the temperature of the DC-DC converter. When the temperature of the DC-DC converter is greater than the temperature threshold, it indicates that the temperature of the DC-DC converter is too high and the heat generated by the switch tube is not dissipated in time. At this time, the DC-DC converter needs to be controlled to be in idle mode.

[0137] It can be seen that by judging whether the DC-DC converter needs to work according to the temperature, when the temperature is greater than the temperature threshold, the DC-DC converter is controlled to be in idle mode. Therefore, when an abnormality occurs in the motor, the DC-DC converter can be controlled to be in idle state to cut off the power supply of the motor, thereby protecting the motor drive system.

[0138] The following takes the motor as a winch motor, the DC-DC converter as a bidirectional DC-DC converter, and the energy storage unit as a power battery as an example to illustrate the control process of the motor and the DC-DC converter.

[0139] like Fig.10 As shown, the control process of the motor is:

[0140] S1001, initialize the winch motor.

[0141] S1002: Receive a command to drive the winch motor.

[0142] S1003, setting the speed of the winch motor.

[0143] S1004: Turn on the bidirectional DC-DC converter and collect signals such as voltage, current and temperature.

[0144] Among them, the voltage, current and temperature signals of the bidirectional DC-DC converter, and the temperature and load signals of the winch motor are collected respectively.

[0145] S1005, judging whether the state of the winch motor is normal. If the state is abnormal, executing S1007, if the state is normal, executing S1006.

[0146] Among them, whether the state of the winch motor is normal is judged by the bus voltage of the motor.

[0147] S1006, driving the winch motor and controlling the bidirectional DC-DC converter to be in power supply mode.

[0148] S1007, determine whether the motor is in a braking state. If not, execute S1009, if yes, execute S1008.

[0149] S1008, stop the winch motor and control the bidirectional DC-DC converter to be in charging mode.

[0150] S1009, stop the winch motor and sound an alarm.

[0151] It should be noted that, when the temperature of the DC-DC converter is too high, the temperature of the winch motor is too high, or the current exceeds a set threshold, it is also necessary to stop driving the winch motor.

[0152] S1010: Whether a command to stop the winch motor is received. If yes, the control process ends. If no, S1003 is executed.

[0153] like Fig.11 As shown, the control process of the bidirectional DC-DC converter is:

[0154] S1101, initialize the sensor.

[0155] S1102. Collect the power battery voltage and set the rated working voltage of the motor.

[0156] S1103, receiving a command to drive the winch motor.

[0157] S1104, collecting signals such as voltage, current and temperature.

[0158] S1105, judging whether the state of the winch motor is normal. If the state is abnormal, executing S1107, if the state is normal, executing S1106.

[0159] Among them, whether the state of the winch motor is normal is judged by the bus voltage of the motor.

[0160] S1106 , control the bidirectional DC-DC converter to be in power supply mode.

[0161] S1107, determine whether the voltage of the motor is normal. If it is abnormal, execute S1109, if it is normal, execute S1108.

[0162] S1108 , control the bidirectional DC-DC converter to be in charging mode.

[0163] S1109: Determine whether the temperature of the bidirectional DC-DC converter is normal. If it is abnormal, execute S1111; if it is normal, execute S1110.

[0164] S1110 , control the bidirectional DC-DC converter to be in an idle mode.

[0165] S1111: Is a command to stop the winch motor received? If yes, execute S1112. If no, execute S1104.

[0166] S1112, control the bidirectional DC-DC converter to turn off.

[0167] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. In order to achieve the above functions, the energy management device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0168] The embodiment of the present application can exemplarily divide the functional modules of the energy management device according to the above method. For example, the energy management device can include various functional modules corresponding to the various functional divisions, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0169] Fig.12A possible structural diagram of the energy management device involved in the above embodiment is shown. Fig.12 The energy management device 1200 includes: an acquisition unit 1201 and a processing unit 1202.

[0170] The acquisition unit 1201 is used to acquire the working parameters of the motor drive system, which includes a motor, an energy storage unit and a DC-DC converter, wherein one end of the DC-DC converter is connected to the motor, and the other end is connected to the energy storage unit.

[0171] The processing unit 1202 is used to control the working mode of the DC-DC converter based on the working parameters of the motor drive system.

[0172] In some embodiments, the working modes of the above-mentioned DC-DC converter include power supply mode, charging mode and idle mode; wherein, the power supply mode is used to use the energy storage unit to power the motor; the charging mode is used to use the motor to charge the energy storage unit; the idle mode is when the DC-DC converter is in a non-working state.

[0173] In some embodiments, the processing unit 1202 is specifically configured to control the DC-DC converter to be in the power supply mode when the operating parameters of the motor drive system meet the power supply mode operating conditions.

[0174] In some embodiments, the operating parameters of the motor drive system include the current of the motor drive system; and the power supply mode operating conditions include: the current of the motor drive system is greater than a current threshold.

[0175] In some embodiments, the operating parameters of the motor drive system include the bus voltage of the motor; the power supply mode operating conditions include: the bus voltage of the motor is less than a voltage threshold.

[0176] In some embodiments, the processing unit 1202 is specifically configured to control the DC-DC converter to be in the charging mode when the operating parameters of the motor drive system meet the charging mode operating conditions.

[0177] In some embodiments, the operating parameters of the motor drive system include the current of the motor drive system; and the charging mode operating conditions include: the current of the motor drive system is less than a current threshold.

[0178] In some embodiments, the operating parameters of the motor drive system include the bus voltage of the motor; and the charging mode operating conditions include: the bus voltage of the motor is greater than a voltage threshold.

[0179] In some embodiments, the above charging mode operating condition also includes: the motor is in a braking state.

[0180] In some embodiments, the processing unit 1202 is specifically configured to control the DC-DC converter to be in the idle mode when the operating parameters of the motor drive system meet the idle mode operating conditions.

[0181] In some embodiments, the operating parameters of the motor drive system include the current of the motor drive system; and the idle mode operating condition includes: the current of the motor drive system is equal to a current threshold.

[0182] In some embodiments, the operating parameters of the motor drive system include the temperature of the DC-DC converter; and the idle mode operating condition includes: the temperature of the DC-DC converter is greater than a temperature threshold.

[0183] In some embodiments, the motor comprises a motor in a winch system.

[0184] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0185] Fig.13 This is a schematic diagram of the structure of a device provided in an embodiment of the present application. Fig.13 As shown, the device 1300 includes but is not limited to: a processor 1301 and a memory 1302.

[0186] The memory 1302 is used to store executable instructions of the processor 1301. It can be understood that the processor 1301 is configured to execute instructions to implement the group fault detection method in the above embodiment.

[0187] It should be noted that those skilled in the art can understand that Fig.13 The device structure shown in the figure does not constitute a limitation of the device, and the device may include Fig.13 More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0188] The processor 1301 is the control center of the device. It uses various interfaces and lines to connect various parts of the entire device. By running or executing software programs and / or modules stored in the memory 1302 and calling data stored in the memory 1302, it executes various functions of the device and processes data, thereby monitoring the device as a whole. The processor 1301 may include one or more processing units. Optionally, the processor 1301 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 1301.

[0189] The memory 1302 may be used to store software programs and various data. The memory 1302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one functional module (such as a determination unit, a processing unit, etc.), etc. In addition, the memory 1302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0190] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, such as a memory 1302 including instructions, and the above instructions can be executed by the processor 1301 of the device 1300 to implement the method in the above embodiment.

[0191] In actual implementation, Fig.12 The acquisition unit 1201 and the processing unit 1202 in the embodiment can both be composed of Fig.13 The processor 1301 in the embodiment calls the computer program stored in the memory 1302 to implement. The specific execution process can refer to the description of the method part in the above embodiment, which will not be repeated here.

[0192] Optionally, the computer-readable storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0193] In an exemplary embodiment, the present application also provides a computer program product including one or more instructions, and the one or more instructions can be executed by the processor 1301 of the device to complete the method in the above embodiment.

[0194] It should be noted that when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor of the device, the various processes of the above-mentioned method embodiment are implemented, and the same technical effect as the above-mentioned method can be achieved. To avoid repetition, they will not be repeated here.

[0195] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0196] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, 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 interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0197] The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0198] In addition, each functional unit in each embodiment of 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. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0199] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the full classification part or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute the full classification part or part of the steps of each embodiment method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, disk or CD and other media that can store program code.

[0200] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0201] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An energy management method, characterized in that: include: Acquire operating parameters of a motor drive system, wherein the motor drive system includes a motor, an energy storage unit, and a DC-DC converter; wherein one end of the DC-DC converter is connected to the motor, and the other end is connected to the energy storage unit; Based on the operating parameters of the motor drive system, the operating mode of the DC-DC converter is controlled.

2. The method according to claim 1, characterized in that The working modes of the DC-DC converter include a power supply mode, a charging mode and an idle mode; wherein the power supply mode is used to utilize the energy storage unit to power the motor; the charging mode is used to utilize the motor to charge the energy storage unit; and the idle mode is when the DC-DC converter is in a non-working state.

3. The method according to claim 2, characterized in that The controlling the working mode of the DC-DC converter based on the working parameters of the motor drive system includes: When the operating parameters of the motor drive system meet the power supply mode operating conditions, the DC-DC converter is controlled to be in the power supply mode.

4. The method according to claim 3, characterized in that The working parameters of the motor drive system include the current of the motor drive system; and the power supply mode operating condition includes: the current of the motor drive system is greater than a current threshold.

5. The method according to claim 3, characterized in that: The operating parameters of the motor drive system include the bus voltage of the motor; the power supply mode operating condition includes: the bus voltage of the motor is less than a voltage threshold.

6. The method according to claim 2, characterized in that The controlling the working mode of the DC-DC converter based on the working parameters of the motor drive system includes: When the operating parameters of the motor drive system meet the charging mode operating conditions, the DC-DC converter is controlled to be in the charging mode.

7. The method according to claim 6, characterized in that The operating parameters of the motor drive system include the current of the motor drive system; and the charging mode operating condition includes: the current of the motor drive system is less than a current threshold.

8. The method according to claim 6, characterized in that The operating parameters of the motor drive system include the bus voltage of the motor; the charging mode operating condition includes: the bus voltage of the motor is greater than a voltage threshold.

9. The method according to claim 6, characterized in that The charging mode operating condition also includes: the motor is in a braking state.

10. The method according to claim 2, characterized in that The controlling the working mode of the DC-DC converter based on the working parameters of the motor drive system includes: When the operating parameters of the motor drive system meet the idle mode operating conditions, the DC-DC converter is controlled to be in the idle mode.

11. The method according to claim 10, characterized in that The working parameters of the motor drive system include the current of the motor drive system; and the idle mode operating condition includes: the current of the motor drive system is equal to a current threshold.

12. The method according to claim 10, characterized in that The operating parameters of the motor drive system include the temperature of the DC-DC converter; and the idle mode operating condition includes: the temperature of the DC-DC converter is greater than a temperature threshold.

13. The method according to any one of claims 1 to 12, characterized in that: The motor comprises a motor in a winch system.

14. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the energy management method according to any one of claims 1 to 13.

15. A computer-readable storage medium, characterized in that: When the computer-executable instructions stored in the computer-readable storage medium are executed by a processor of a device, the device is capable of performing the energy management method according to any one of claims 1 to 13.

16. A vehicle, characterized in that: include: The electronic device of claim 14, or the computer-readable storage medium of claim 15.

17. A computer program product, comprising computer instructions, characterized in that: When the computer instructions are executed on a processor of a device, the device is enabled to perform the energy management method according to any one of claims 1 to 13.

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