Electric drive control method and device based on heat pump air conditioner, electronic device and computer program product

Abstract

This invention discloses an electric drive control method, apparatus, electronic device, and computer program product based on a heat pump air conditioning system, relating to the field of electric vehicle technology. The method includes: obtaining the heat radiation exchange strategy of the heat pump air conditioning system in the electric vehicle; controlling the drive motor according to a first efficiency mode that maximizes motor efficiency when the heat radiation exchange strategy is a first or second heat exchange strategy; and controlling the drive motor according to a second efficiency mode that minimizes the total power of the heat pump air conditioning system and the drive motor when the heat radiation exchange strategy is a third heat exchange strategy, wherein the total power is determined based on the load of the heat pump air conditioning system and the motor efficiency of the drive motor. This invention solves the technical problem of poor overall vehicle energy-saving performance when heat pump air conditioning is applied to electric vehicles.

Description

Technical Field

[0001] This invention relates to the field of electric vehicles, and more specifically, to an electric drive control method, apparatus, electronic device, and computer program product based on a heat pump air conditioner. Background Technology

[0002] Most electric vehicles currently use heat pump air conditioning systems. At low temperatures, heat pumps typically absorb heat from the air, which is usually lower than the cooling circuit of the motor system. This is because the motor system generates heat during vehicle operation. Compared to absorbing heat from the air, heat pump systems are more efficient at absorbing heat from the higher-temperature motor cooling circuit, resulting in lower overall power consumption.

[0003] With technological advancements, some heat pump solutions have emerged in the industry that absorb heat from the motor system's cooling circuit. These solutions are typically for water-cooled electric drive systems, where the motor and inverter are water-cooled, while the gearbox is oil-cooled. The motor and inverter share one cooling circuit, while the gearbox has a separate cooling circuit. These two circuits are independent and do not exchange heat. The heat pump absorbs heat from the motor and inverter cooling circuit, not from the gearbox's oil circuit. However, because the motor and inverter have high efficiency and generate less heat at low temperatures, the amount of heat absorbed by the heat pump is limited, resulting in limited energy savings. Furthermore, current control strategies typically determine whether to absorb heat based on ambient temperature and motor coolant temperature, without considering the principle of overall energy optimization, leading to insufficient overall vehicle energy savings.

[0004] There is currently no effective solution to the technical problem of poor energy-saving performance of electric vehicles when using heat pump air conditioning. Summary of the Invention

[0005] This invention provides an electric drive control method, device, electronic device, and computer program product based on heat pump air conditioning, to at least solve the technical problem of poor overall vehicle energy-saving effect when heat pump air conditioning is applied to electric vehicles.

[0006] According to one embodiment of the present invention, an electric drive control method based on a heat pump air conditioning system is provided, comprising: obtaining a heat radiation exchange strategy of a heat pump air conditioning system in an electric vehicle, wherein the heat radiation exchange strategy includes: a first heat exchange strategy representing the heat pump in the heat pump air conditioning system absorbing heat from the air, a second heat exchange strategy representing the heat pump absorbing heat from the power battery, and a third heat exchange strategy representing the heat pump absorbing heat from the drive motor; when the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy, controlling the drive motor according to a first efficiency mode with the highest motor efficiency; when the heat radiation exchange strategy is the third heat exchange strategy, controlling the drive motor according to a second efficiency mode with the lowest total power of the heat pump air conditioning system and the drive motor, wherein the total power is determined based on the load of the heat pump air conditioning system and the motor efficiency of the drive motor.

[0007] Optionally, obtaining the heat exchange strategy of the heat pump air conditioning system in an electric vehicle includes: collecting temperature parameters in the thermal management system of the electric vehicle, wherein the thermal management system includes at least: the heat pump air conditioning system, the battery cooling water system, and the electric drive cooling water system, and the temperature parameters include: a first temperature in the heat pump air conditioning system, a second temperature in the battery cooling water system, and a third temperature in the electric drive cooling water system; determining the heat radiation exchange strategy as the first heat exchange strategy when the first temperature is greater than the second temperature and the third temperature is also greater; determining the heat radiation exchange strategy as the second heat exchange strategy when the second temperature is greater than the first temperature and the second temperature is also greater than the third temperature; and determining the heat radiation exchange strategy as the third heat exchange strategy when the third temperature is greater than the first temperature and the third temperature is also greater than the second temperature.

[0008] Optionally, when the heat radiation exchange strategy is the first heat exchange strategy, the method further includes: disconnecting the connection between the heat pump air conditioning system and the water system, wherein the water system includes: the battery cooling water system and the electric drive cooling water system; adjusting the water pump mode in the thermal management system to a first water pump mode, wherein in the first water pump mode, the first water pump in the heat pump air conditioning system is turned on, the second water pump in the battery cooling water system is turned off, the third water pump in the electric drive cooling water system is turned off, and the rotational speed of the first water pump is positively correlated with the load of the compressor corresponding to the heat pump air conditioning system.

[0009] Optionally, when the heat radiation exchange strategy is the second heat exchange strategy, the method further includes: connecting the heat pump air conditioning system to the battery cooling water circuit system and disconnecting the connection between the heat pump air conditioning system and the electric drive cooling water circuit system; adjusting the water pump mode in the thermal management system to the second water pump mode, wherein, in the second water pump mode, the first water pump in the heat pump air conditioning system is turned on, the second water pump in the battery cooling water circuit system is turned on, the third water pump in the electric drive cooling water circuit system is turned off, the rotational speed of the first water pump is positively correlated with the load of the compressor corresponding to the heat pump air conditioning system, and the rotational speed of the second water pump is positively correlated with the discharge power of the power battery corresponding to the battery cooling water circuit system.

[0010] Optionally, when the heat radiation exchange strategy is the third heat exchange strategy, the method further includes: connecting the heat pump air conditioning system to the electric drive cooling water circuit system and disconnecting the connection between the heat pump air conditioning system and the battery cooling water circuit system; adjusting the water pump mode in the thermal management system to the third water pump mode, wherein, in the third water pump mode, the first water pump in the heat pump air conditioning system is turned on, the second water pump in the battery cooling water circuit system is turned off, and the third water pump in the electric drive cooling water circuit system is turned on, the rotational speed of the first water pump is positively correlated with the load of the compressor corresponding to the heat pump air conditioning system, and the rotational speed of the third water pump is positively correlated with the motor power of the drive motor corresponding to the electric drive cooling water circuit system.

[0011] Optionally, after collecting temperature parameters in the thermal management system of the electric vehicle, the method further includes: detecting whether the heat pump air conditioning system is turned on; after the heat pump air conditioning system is turned on, determining the heat radiation exchange strategy; and when the heat pump air conditioning system is not turned on, determining the water circuit heat exchange strategy for heat exchange between the battery cooling water circuit system and the electric drive cooling water circuit system.

[0012] Optionally, when the heat pump air conditioning system is not turned on, the water circuit heat exchange strategy for heat exchange between the battery cooling water circuit system and the electric drive cooling water circuit system includes: when the third temperature is not greater than the second temperature, the water circuit heat exchange strategy is determined to be a third heat exchange strategy, wherein, under the third heat exchange strategy, the battery cooling water circuit system and the electric drive cooling water circuit system do not exchange heat; when the third temperature is greater than the second temperature, the water circuit heat exchange strategy is determined to be a fourth heat exchange strategy, wherein, under the fourth heat exchange strategy, the battery cooling water circuit system and the electric drive cooling water circuit system exchange heat.

[0013] Optionally, when the water circuit heat exchange strategy is the third heat exchange strategy, the method further includes: disconnecting the connection between the battery cooling water circuit system and the electric drive cooling water circuit system; adjusting the water pump mode in the thermal management system to the fourth water pump mode, wherein, in the fourth water pump mode, the first water pump in the heat pump air conditioning system is turned off, the second water pump in the battery cooling water circuit system is turned off, and the third water pump in the electric drive cooling water circuit system is turned off.

[0014] Optionally, when the water circuit heat exchange strategy is the fourth heat exchange strategy, the method further includes: connecting the battery cooling water circuit system with the electric drive cooling water circuit system; adjusting the water pump mode in the thermal management system to the fifth water pump mode, wherein in the fifth water pump mode, the first water pump in the heat pump air conditioning system is turned off, the second water pump in the battery cooling water circuit system is turned on, the third water pump in the electric drive cooling water circuit system is turned on, the rotational speed of the second water pump and the rotational speed of the third water pump are both target rotational speeds, and the target rotational speed is positively correlated with the temperature difference between the second temperature and the third temperature.

[0015] Optionally, when the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy, controlling the drive motor according to the first efficiency mode with the highest motor efficiency includes: acquiring a plurality of preset configured motor drive algorithms for controlling the drive motor, wherein each motor drive algorithm is pre-configured with a corresponding motor efficiency; and when the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy, determining the motor drive algorithm with the highest motor efficiency as the first efficiency mode.

[0016] Optionally, when the heat radiation exchange strategy is the third heat exchange strategy, controlling the drive motor according to the second efficiency mode with the minimum total power of the heat pump air conditioning system and the drive motor includes: acquiring a plurality of preset configured motor drive algorithms for controlling the drive motor, wherein each motor drive algorithm is pre-configured with a corresponding motor efficiency; when the heat radiation exchange strategy is the third heat exchange strategy, determining the total power corresponding to each motor drive algorithm based on the compressor load and the motor efficiency of the drive motor in the heat pump air conditioning system; and determining the motor drive algorithm with the lowest total power as the second efficiency mode.

[0017] According to one embodiment of the present invention, an electric drive control device based on a heat pump air conditioner is also provided, comprising: an acquisition module, configured to acquire a heat radiation exchange strategy of a heat pump air conditioner system in an electric vehicle, wherein the heat radiation exchange strategy includes: a first heat exchange strategy representing the heat pump in the heat pump air conditioner system absorbing heat from the air, a second heat exchange strategy representing the heat pump absorbing heat from the power battery, and a third heat exchange strategy representing the heat pump absorbing heat from the drive motor; a first control module, configured to control the drive motor according to a first efficiency mode with the highest motor efficiency when the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy; and a second control module, configured to control the drive motor according to a second efficiency mode with the lowest total power of the heat pump air conditioner system and the drive motor when the heat radiation exchange strategy is the third heat exchange strategy, wherein the total power is determined based on the load of the heat pump air conditioner system and the motor efficiency of the drive motor.

[0018] According to one embodiment of the present invention, an electronic device is also provided, comprising: a memory and a processor, the processor being configured to run a program stored in the memory, wherein the program, when running, executes the above-described electric drive control method based on a heat pump air conditioner.

[0019] According to one embodiment of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements the steps of the above-described electric drive control method based on a heat pump air conditioner.

[0020] In this embodiment of the invention, based on the heat exchange method of the heat pump in the heat pump air conditioning system, the most efficient heat radiation exchange strategy can be intelligently selected according to the actual heat source temperature. This avoids the high energy consumption caused by forcibly absorbing heat when the heat source temperature is extremely low, thus improving the economic efficiency of system operation. Furthermore, for different heat radiation exchange strategies, a corresponding efficiency control mode can be selected to control the drive motor. This efficiency control mode does not simply pursue the highest efficiency of the motor, but rather aims to minimize the total power of the "heat pump air conditioning system + drive motor". It allows the drive motor to operate in a lower efficiency range to increase heat generation, thereby improving the heat absorption efficiency of the heat pump and reducing the power consumption of the heat pump compressor. This avoids the defect of focusing only on the efficiency of the drive motor or only on the efficiency of the heat pump, which leads to suboptimal vehicle energy consumption. It achieves the goal of ensuring an overall balance between the losses on the drive motor side and the energy consumption on the heat pump side, thus achieving the technical effect of significantly reducing the overall vehicle power consumption under heating conditions. This solves the technical problem of poor energy-saving effect of electric vehicles using heat pump air conditioning. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0022] Figure 1 This is a flowchart of an electric drive control method based on a heat pump air conditioner according to one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of an electric vehicle cryogenic energy management system according to one embodiment of the present invention. Figure 1 ;

[0024] Figure 3 This is a schematic diagram of a control system according to one embodiment of the present invention. Figure 1 ;

[0025] Figure 4 This is a schematic diagram of a heat pump heat absorption strategy according to one embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of a control strategy according to one embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of an electric drive battery heat exchange strategy according to one embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the overall framework of a control strategy according to one embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of an electric vehicle cryogenic energy management system according to one embodiment of the present invention. Figure 2 ;

[0030] Figure 9 This is a schematic diagram of a control system according to one embodiment of the present invention. Figure 2 ;

[0031] Figure 10 This is a structural block diagram of an electric drive control device for a heat pump air conditioner according to one embodiment of the present invention. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. In the description of these embodiments, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] According to one embodiment of the present invention, an embodiment of an electric drive control method based on a heat pump air conditioner is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0035] This method embodiment can be executed in an electronic device, similar control device, or system that includes a memory and a processor. Taking an electronic device as an example, the electronic device may include one or more processors and a memory for storing data. Optionally, the electronic device may also include a communication device for communication functions and a display device. Those skilled in the art will understand that the above structural description is merely illustrative and does not limit the structure of the electronic device. For example, the electronic device may include more or fewer components than described above, or have a different configuration than described above.

[0036] A processor may include one or more processing units. For example, a processor may include a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing (DSP) chip, a microcontroller unit (MCU), a field-programmable gate array (FPGA), a neural network processing unit (NPU), a tensor processing unit (TPU), or an artificial intelligence (AI) processor. Different processing units may be independent components or integrated into one or more processors. In some instances, electronic devices may also include one or more processors.

[0037] The memory can be used to store computer programs, such as the computer program corresponding to the electric drive control method based on a heat pump air conditioner in this embodiment of the invention. The processor implements the aforementioned electric drive control method based on a heat pump air conditioner by running the computer program stored in the memory. The memory may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include memory remotely located relative to the processor, and these remote memories can be connected to electronic devices via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0038] Communication devices are used to receive or send data via a network. Specific examples of such networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the communication device includes a network interface controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the communication device may be a radio frequency (RF) module used for wireless communication with the Internet.

[0039] Display devices can be, for example, touchscreen liquid crystal displays (LCDs) and touch displays (also referred to as "touchscreens" or "touch displays"). The LCD allows users to interact with the user interface of the mobile terminal. In some embodiments, the mobile terminal has a graphical user interface (GUI), which allows users to interact with the GUI through finger contact and / or gestures on a touch-sensitive surface. Optional human-computer interaction functions include: creating web pages, drawing, word processing, creating electronic documents, playing games, video conferencing, instant messaging, sending and receiving emails, call interfaces, playing digital video, playing digital music, and / or web browsing, etc. Executable instructions for performing the above human-computer interaction functions are configured / stored in one or more processor-executable computer program products or readable storage media.

[0040] This embodiment provides an electric drive control method for a heat pump-based air conditioner operating in an electronic device. Figure 1 This is a flowchart of an electric drive control method for a heat pump air conditioner according to one embodiment of the present invention, as shown below. Figure 1 As shown, the process includes the following steps:

[0041] Step S101: Obtain the heat radiation exchange strategy of the heat pump air conditioning system in the electric vehicle, wherein the heat radiation exchange strategy includes: a first heat exchange strategy representing the heat pump in the heat pump air conditioning system absorbing heat from the air, a second heat exchange strategy representing the heat pump absorbing heat from the power battery, and a third heat exchange strategy representing the heat pump absorbing heat from the drive motor.

[0042] Step S102: When the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy, control the drive motor according to the first efficiency mode with the highest motor efficiency.

[0043] Step S103: When the heat radiation exchange strategy is the third heat exchange strategy, control the drive motor according to the second efficiency mode that minimizes the total power of the heat pump air conditioning system and the drive motor. The total power is determined based on the load of the heat pump air conditioning system and the motor efficiency of the drive motor.

[0044] In this embodiment of the invention, based on the heat exchange method of the heat pump in the heat pump air conditioning system, the most efficient heat radiation exchange strategy can be intelligently selected according to the actual heat source temperature. This avoids the high energy consumption caused by forcibly absorbing heat when the heat source temperature is extremely low, thus improving the economic efficiency of system operation. Furthermore, for different heat radiation exchange strategies, a corresponding efficiency control mode can be selected to control the drive motor. This efficiency control mode does not simply pursue the highest efficiency of the motor, but rather aims to minimize the total power of the "heat pump air conditioning system + drive motor". It allows the drive motor to operate in a lower efficiency range to increase heat generation, thereby improving the heat absorption efficiency of the heat pump and reducing the power consumption of the heat pump compressor. This avoids the defect of focusing only on the efficiency of the drive motor or only on the efficiency of the heat pump, which leads to suboptimal vehicle energy consumption. It achieves the goal of ensuring an overall balance between the losses on the drive motor side and the energy consumption on the heat pump side, thus achieving the technical effect of significantly reducing the overall vehicle power consumption under heating conditions. This solves the technical problem of poor energy-saving effect of electric vehicles using heat pump air conditioning.

[0045] The above-mentioned electric drive control method based on heat pump air conditioning is executed through the electric vehicle low-temperature energy management system.

[0046] Figure 2 This is a schematic diagram of an electric vehicle cryogenic energy management system according to one embodiment of the present invention. Figure 1 ,like Figure 2 As shown, this refers to a dual-drive system with one electric drive system, specifically including: a thermal management system and a control system; the thermal management system includes: a heat pump air conditioning system, an electric drive cooling water circuit system, and a battery cooling water circuit system; the heat pump air conditioning system includes: an air conditioning chiller (such as a heat pump), an electric water pump 1 (such as a first water pump), a compressor, and other related components; the battery cooling water circuit system includes: a power battery, an electric water pump 2 (such as a second water pump), a three-way valve 2, a three-way valve 3, a water temperature sensor 2 (for collecting a second temperature), and other components; the electric drive cooling water circuit system includes: a first motor (such as a drive motor), a first inverter, an electric water pump 3 (such as a third water pump), a three-way valve 1, a water temperature sensor 1 (for collecting a third temperature), and other components.

[0047] It should be noted that the electric drive cooling water system and the battery cooling water system adopt a water-cooling solution, and can use the same water system to transfer the heat generated by the power battery and the drive motor.

[0048] Optionally, the water system and the heat pump air conditioning system are independent heat transfer pipelines. The heat pump in the heat pump air conditioning system exchanges heat with the water system through thermal radiation. By switching the connection between the heat pump air conditioning system, the electric drive cooling water system and the battery cooling water system, multiple thermal radiation exchange strategies can be obtained.

[0049] Optionally, the interconnected heat pump air conditioning system, electric drive cooling water system, and battery cooling water system indicate that heat exchange can occur between the systems, but do not necessarily indicate that the piping between the systems is interconnected.

[0050] Optionally, such as Figure 2 As shown, when port 1 and port 3 of the three-way valve 1 are connected and port 1 and port 2 are closed, the heat from the electric drive cooling water circuit can flow through the air conditioner chiller, and the heat pump can absorb heat from the electric drive cooling water circuit, thereby reducing energy consumption. When port 1 and port 3 of the three-way valve 1 are closed and port 1 and port 2 are connected, the heat from the electric drive water circuit does not flow through the air conditioner chiller, and the heat pump cannot absorb heat from the electric drive water circuit.

[0051] Optionally, such as Figure 2 As shown, when ports 1 and 2 of three-way valve 2 are connected and ports 2 and 3 of three-way valve 3 are connected, the power battery can exchange heat with the electric drive cooling system. When ports 3 and 2 of three-way valve 2 are connected and ports 2 and 1 of three-way valve 3 are connected, the power battery can exchange heat with the air conditioner chiller.

[0052] Figure 3 This is a schematic diagram of a control system according to one embodiment of the present invention. Figure 1 ,like Figure 3 As shown, the control system includes: a central domain controller (VDC), a first motor controller (MCU1), a battery management system (BMS), an electronic stability control system (ESC), an air conditioning system controller (ATC), electric water pump 1, electric water pump 2, electric water pump 3, three-way valve 1, three-way valve 2, three-way valve 3, and other components.

[0053] Optionally, such as Figure 3 As shown, MCU1 sends information such as motor speed, torque, and system efficiency (motor-inverter combined efficiency) to VDC. VDC comprehensively judges the vehicle status and assembly status, and sends the motor efficiency mode command to MCU1. BMS sends information such as battery SOC and charging / discharging power to VDC. ESC sends information such as vehicle speed, acceleration, and deceleration to VDC. Air conditioning controller (ATC) sends information such as ambient temperature, air conditioning operating status, and heat pump heat absorption request status to VDC. Water temperature sensor 1 sends water temperature information from the outlet of the electric drive (such as the drive motor) to VDC. Water temperature sensor 2 sends water temperature information from the outlet of the power battery to VDC. VDC sends the speed command of electric water pump 1 to electric water pump 1. VDC sends the speed command of electric water pump 2 to electric water pump 2. VDC sends the speed command of electric water pump 3 to electric water pump 3. VDC sends the opening and closing commands of three-way valve 1, three-way valve 2, and three-way valve 3 to three-way valve 1, three-way valve 2, and three-way valve 3, respectively.

[0054] The embodiments described above are primarily used in scenarios where users turn on air conditioning for heating in low-temperature conditions. The motor system (motor + inverter) can achieve different efficiency operating modes through control algorithms. When using a high-efficiency operating mode, the motor system experiences less loss, which is beneficial to the overall vehicle energy consumption. However, the motor system generates less heat, and the heat pump system can absorb less heat, resulting in higher heat pump power consumption, which is detrimental to the overall vehicle energy consumption. Conversely, when the motor system uses a low-efficiency operating mode, the motor system experiences more loss, which is also detrimental to energy consumption. However, the motor system generates more heat, and the heat pump system can absorb more heat, resulting in lower heat pump power consumption, which is beneficial to energy consumption. Therefore, there is a balance point when the heat pump system operates at low temperatures, resulting in optimal system energy consumption for the entire vehicle. Based on this consideration, by controlling the efficiency operating mode of the motor system and the operating state of the thermal management system with the goal of optimizing overall vehicle energy consumption, the energy saving of the entire vehicle can be maximized.

[0055] Optionally, in step S101, obtaining the heat exchange strategy of the heat pump air conditioning system in the electric vehicle may include the following execution steps:

[0056] Step S101a: Collect temperature parameters in the thermal management system of the electric vehicle. The thermal management system includes at least: a heat pump air conditioning system, a battery cooling water system, and an electric drive cooling water system. The temperature parameters include: a first temperature in the heat pump air conditioning system, a second temperature in the battery cooling water system, and a third temperature in the electric drive cooling water system.

[0057] Step S101b: If the first temperature is greater than the second temperature and the first temperature is greater than the third temperature, determine the heat radiation exchange strategy as the first heat exchange strategy.

[0058] Step S101c: When the second temperature is greater than the first temperature and the second temperature is greater than the third temperature, the heat radiation exchange strategy is determined to be the second heat exchange strategy.

[0059] In step S101d, when the third temperature is greater than the first temperature and the third temperature is greater than the second temperature, the heat radiation exchange strategy is determined to be the third heat exchange strategy.

[0060] In this embodiment of the invention, by collecting and comparing the air conditioning system (ambient temperature), battery water circuit temperature, and electric drive water circuit temperature in real time, the system can preferentially select the heat source with the highest temperature (such as air, electric drive motor, or power battery) for heat absorption. This allows for timely heat absorption from a suitable heat source, significantly improving the heat absorption efficiency of the heat pump evaporator, thereby enhancing the performance coefficient of the heat pump system, reducing compressor power consumption, and providing a reliable data foundation for subsequent water circuit system switching and drive motor control mode selection. This avoids inefficient system operation caused by misjudging the heat source status, thus achieving a significant reduction in the overall vehicle power consumption under heating conditions. This solves the technical problem of poor overall vehicle energy saving when using heat pump air conditioning in electric vehicles.

[0061] Figure 4 This is a schematic diagram of a heat pump heat absorption strategy according to one embodiment of the present invention, such as... Figure 4 As shown, the default heat pump absorbs heat from the water source, when the conditions are met... At this time, the heat pump enters the air source heat absorption mode (such as the first heat exchange strategy), where, The third temperature reported by temperature sensor 1 The second temperature reported by temperature sensor 2. The ambient temperature (e.g., the first temperature) is preferably 5℃.

[0062] Optionally, such as Figure 4 As shown, when the following conditions are met At this time, the heat pump enters the mode of absorbing heat from the water source.

[0063] Optionally, such as Figure 4 As shown, in the heat pump heat absorption mode from the water source, the default mode is to switch to heat pump heat absorption mode from the electric drive (such as the third heat exchange strategy). When the conditions are met... (Preferred temperature 5°C), enters the heat pump mode to absorb heat from the power battery (such as the second heat exchange strategy), when the condition is met. The heat pump then enters the electric drive heat absorption mode (such as the third heat exchange strategy).

[0064] By implementing the above control strategy, the heat pump can absorb heat from a higher-temperature heat source, thereby reducing the energy consumption of the heat pump system and the overall vehicle power consumption.

[0065] Optionally, after step S101b, that is, when the heat radiation exchange strategy is the first heat exchange strategy, the electric drive control method based on heat pump air conditioning may further include the following execution steps:

[0066] Step S101b1: Disconnect the connection between the heat pump air conditioning system and the water system, wherein the water system includes: a battery cooling water system and an electric drive cooling water system;

[0067] Step S101b2: Adjust the water pump mode in the thermal management system to the first water pump mode. In the first water pump mode, the first water pump in the heat pump air conditioning system is turned on, the second water pump in the battery cooling water circuit system is turned off, and the third water pump in the electric drive cooling water circuit system is turned off. The speed of the first water pump is positively correlated with the load of the compressor corresponding to the heat pump air conditioning system.

[0068] In this embodiment of the invention, when the heat pump absorbs heat from the air (first heat exchange strategy), the connection between the heat pump air conditioning system and the water system is disconnected. Only the first water pump of the air conditioning water circuit is turned on, while the water pumps of the battery and electric drive water circuits are turned off. This avoids energy waste caused by unnecessary circulation or heat exchange, reduces unnecessary water pump operating power consumption, and ensures that the speed of the first water pump is positively correlated with the compressor load, thus ensuring that the coolant flow rate is precisely matched with the current heating demand. This avoids pump power waste caused by excessive flow, improves the control accuracy and energy efficiency of the air conditioning system, and achieves the technical effect of significantly reducing the overall vehicle power consumption under heating conditions. This solves the technical problem of poor overall vehicle energy saving effect when heat pump air conditioning is applied to electric vehicles.

[0069] Optionally, such as Figure 2 As shown, in the heat pump heat absorption mode from the air source (i.e., the first heat exchange strategy): electric water pump 1 operates, and its speed is related to the load of the heat pump air conditioner compressor. The greater the load, the higher the speed of electric water pump 1, which is determined by the calibration value. Electric water pumps 2 and 3 do not operate. Port 1 and port 2 of three-way valve 1 are connected and port 1 and port 3 are closed. Port 3 and port 2 of three-way valve 2 are connected and port 1 and port 2 are closed. Port 2 and port 1 of three-way valve 3 are connected and port 2 and port 3 are closed.

[0070] Optionally, after step S101c, that is, when the heat radiation exchange strategy is the second heat exchange strategy, the electric drive control method based on heat pump air conditioning may further include the following execution steps:

[0071] Step S101c1: Connect the heat pump air conditioning system to the battery cooling water system and disconnect the connection between the heat pump air conditioning system and the electric drive cooling water system.

[0072] Step S101c2: Adjust the water pump mode in the thermal management system to the second water pump mode. In the second water pump mode, the first water pump in the heat pump air conditioning system is turned on, the second water pump in the battery cooling water circuit system is turned on, and the third water pump in the electric drive cooling water circuit system is turned off. The speed of the first water pump is positively correlated with the load of the compressor corresponding to the heat pump air conditioning system, and the speed of the second water pump is positively correlated with the discharge power of the power battery corresponding to the battery cooling water circuit system.

[0073] In this embodiment of the invention, a connection is established between the heat pump air conditioning system and the battery cooling water circuit system, while the connection between the heat pump air conditioning system and the electric drive cooling water circuit system is disconnected. This ensures that the heat pump obtains heat only from the battery, utilizing the residual heat of the battery at low temperatures or the heat after heating, thus avoiding interference from the electric drive heat source to the battery. The second water pump in the battery cooling water circuit system is activated, and the speed of the second water pump is positively correlated with the battery discharge power. When the battery discharge power is high (more heat generated), the water flow is increased to remove more heat to supply the heat pump; when the battery discharge power is low (less heat generated), the flow rate is reduced. This linkage control improves heat exchange efficiency, ensures that the heat pump can obtain a stable heat source, and prevents the battery from overheating or overcooling. This achieves a significant reduction in the overall vehicle power consumption under heating conditions, thereby solving the technical problem of poor energy-saving effect in electric vehicles using heat pump air conditioning.

[0074] Optionally, such as Figure 2 As shown, in the heat pump heat absorption mode from the power battery (i.e., the second heat exchange strategy): electric water pump 3 does not operate; the speed of electric water pump 1 is related to the load of the heat pump air conditioner compressor. The greater the load, the higher the speed of electric water pump 1, which is determined by the calibration value; electric water pump 2 operates; the speed of electric water pump 2 is related to the discharge power of the power battery. The greater the discharge power of the power battery, the higher the speed of electric water pump 2, which is determined by the calibration value; port 1 and port 2 of three-way valve 1 are connected, and port 1 and port 3 are closed; port 3 and port 2 of three-way valve 2 are connected, and port 1 and port 2 are closed; port 2 and port 1 of three-way valve 3 are connected, and port 2 and port 3 are closed.

[0075] Optionally, after step S101d, that is, when the heat radiation exchange strategy is the third heat exchange strategy, the electric drive control method based on heat pump air conditioning may further include the following execution steps:

[0076] Step S101d1: Connect the heat pump air conditioning system to the electric drive cooling water system, and disconnect the connection between the heat pump air conditioning system and the battery cooling water system.

[0077] Step S101d2: Adjust the water pump mode in the thermal management system to the third water pump mode. In the third water pump mode, the first water pump in the heat pump air conditioning system is turned on, the second water pump in the battery cooling water circuit system is turned off, and the third water pump in the electric drive cooling water circuit system is turned on. The speed of the first water pump is positively correlated with the load of the compressor corresponding to the heat pump air conditioning system, and the speed of the third water pump is positively correlated with the motor power of the drive motor corresponding to the electric drive cooling water circuit system.

[0078] In this embodiment of the invention, a connection is established between the heat pump air conditioning system and the electric drive cooling water system. The waste heat generated by the drive motor and inverter is utilized. Because the electric drive waste heat has the characteristics of high temperature and high power, it can significantly improve the energy efficiency of the heat pump. The third water pump in the electric drive cooling water system is activated, and the speed of the third water pump is positively correlated with the motor power. The higher the motor power, the more heat is generated, and the higher the water pump speed, increasing the coolant flow rate to carry away more heat to supply the heat pump. If the motor power is low, the flow rate is reduced. Through a dynamic matching mechanism, the heat load balance on both sides of the heat exchanger is ensured, maximizing the heat transfer efficiency from the electric drive to the heat pump. This achieves a significant reduction in the overall vehicle power consumption under heating conditions, thus solving the technical problem of poor overall vehicle energy saving when heat pump air conditioning is applied to electric vehicles.

[0079] Optionally, such as Figure 2 As shown, in the heat pump's electric drive heat absorption mode (i.e., the third heat exchange strategy): electric water pump 2 does not operate; the speed of electric water pump 1 is related to the load of the heat pump air conditioner compressor; the greater the load, the higher the speed of electric water pump 1, which is determined by the calibration value; electric water pump 3 operates; the speed of electric water pump 3 is related to the motor power; the greater the motor power, the higher the speed of electric water pump 3, which is determined by the calibration value; ports 1 and 2 of three-way valve 1 are closed, and ports 1 and 3 are connected; ports 1 and 3 of three-way valve 2 are connected, and ports 1 and 2 are closed; ports 2 and 1 of three-way valve 3 are closed, and ports 1 and 3 are connected.

[0080] Optionally, after step S101a, that is, after acquiring the temperature parameters in the thermal management system of the electric vehicle, the electric drive control method based on the heat pump air conditioner may further include the following execution steps:

[0081] Step S101e: Check if the heat pump air conditioning system is turned on;

[0082] Step S101f: After the heat pump air conditioning system is turned on, determine the heat radiation exchange strategy;

[0083] Step S101e: When the heat pump air conditioning system is not turned on, determine the water circuit heat exchange strategy for heat exchange between the battery cooling water circuit system and the electric drive cooling water circuit system.

[0084] In this embodiment of the invention, the two functions of "heat pump heating" and "battery-electric drive heat exchange" are decoupled. When the air conditioner is on, heating efficiency is prioritized; when the air conditioner is off, the system reverts to the basic battery-electric drive thermal management logic. This hierarchical control strategy allows the system to find the optimal control target under different operating conditions, avoiding functional conflicts. By detecting the air conditioner's on / off status to trigger different control strategies, the determinism of the control logic is ensured, improving the stability and predictability of the system response. This achieves a significant reduction in the overall vehicle power consumption under heating conditions, thereby solving the technical problem of poor energy-saving performance in electric vehicles using heat pump air conditioning.

[0085] Figure 5 This is a schematic diagram of a control strategy according to one embodiment of the present invention, such as... Figure 5 As shown, the default execution of control strategy 1 (such as water circuit heat exchange strategy) is to switch to control strategy 2 (such as heat radiation exchange strategy) when the air conditioner is turned on and the heat pump has a heat absorption request; in control strategy 2 mode, if the air conditioner is detected to be off or the heat pump has no heat absorption request, the system switches to control strategy 1 (such as water circuit heat exchange strategy).

[0086] Optionally, control strategy 1 includes an electric drive battery heat exchange strategy (such as a water circuit heat exchange strategy) and an electric drive efficiency mode control strategy 1 (such as a first efficiency mode).

[0087] Optionally, control strategy 2 includes a heat pump heat absorption strategy (such as a heat radiation exchange strategy), wherein the heat pump heat absorption strategy includes three types: heat pump absorbing heat from air source (such as a first heat exchange strategy), heat pump absorbing heat from power battery (such as a second heat exchange strategy), and heat pump absorbing heat from electric drive (such as a third heat exchange strategy).

[0088] Optionally, when the heat pump absorbs heat from the air source or from the power battery (such as the first heat exchange strategy and the second heat exchange strategy), the electric drive efficiency mode is executed according to the electric drive efficiency mode control strategy 1 (such as the first efficiency mode); when the heat pump absorbs heat from the electric drive (such as the third heat exchange strategy), the electric drive efficiency mode is executed according to the electric drive efficiency mode control strategy 2 (such as the second efficiency mode).

[0089] Optionally, in step S101e, when the heat pump air conditioning system is not turned on, determining the water circuit heat exchange strategy for heat exchange between the battery cooling water circuit system and the electric drive cooling water circuit system may include the following execution steps:

[0090] Step S101e1: When the third temperature is not greater than the second temperature, the water circuit heat exchange strategy is determined to be the third heat exchange strategy. Under the third heat exchange strategy, the battery cooling water circuit system and the electric drive cooling water circuit system do not exchange heat.

[0091] In step S101e2, when the third temperature is greater than the second temperature, the water circuit heat exchange strategy is determined to be the fourth heat exchange strategy, wherein, under the fourth heat exchange strategy, the battery cooling water circuit system and the electric drive cooling water circuit system exchange heat.

[0092] In this embodiment of the invention, the difference between the electric drive water temperature (e.g., the third temperature) and the battery water temperature (e.g., the second temperature) determines whether heat exchange occurs between the two. When the electric drive temperature is not high (close to or lower than the battery temperature), heat exchange is not performed (the third heat exchange strategy) to prevent battery heat from flowing to the electric drive and causing the battery to cool down. When the electric drive temperature is significantly higher than the battery temperature, heat exchange occurs (the fourth heat exchange strategy) to use the waste heat of the electric drive to heat the battery. In low-temperature environments, this avoids battery heat loss that could reduce battery activity, effectively ensuring the battery's charging and discharging capacity and energy recovery efficiency at low temperatures. This achieves the technical effect of significantly reducing the overall vehicle power consumption under heating conditions, thereby solving the technical problem of poor energy-saving effect in electric vehicles using heat pump air conditioning.

[0093] Figure 6 This is a schematic diagram of an electric drive battery heat exchange strategy according to one embodiment of the present invention, such as... Figure 6 As shown, by default, the electric drive battery does not perform heat exchange (such as the third heat exchange strategy); when the water temperature reported by water temperature sensor 1... (Water temperature reported by water temperature sensor 2) + δT (preferably 5℃), the electric drive battery performs heat exchange (such as the fourth heat exchange strategy; when The electric drive battery does not perform heat exchange (return to the third heat exchange strategy).

[0094] Optionally, after step S101e1, that is, when the water heat exchange strategy is the third heat exchange strategy, the electric drive control method based on heat pump air conditioning may further include the following execution steps:

[0095] Step S101e1a: Disconnect the connection between the battery cooling water system and the electric drive cooling water system;

[0096] Step S101e1b: Adjust the water pump mode in the thermal management system to the fourth water pump mode. In the fourth water pump mode, the first water pump in the heat pump air conditioning system is turned off, the second water pump in the battery cooling water circuit system is turned off, and the third water pump in the electric drive cooling water circuit system is turned off.

[0097] In this embodiment of the invention, when the battery and electric drive are not exchanging heat (third heat exchange strategy), the water circuit is disconnected, making the two thermal systems of battery and electric drive relatively independent thermodynamically. This allows them to operate within their optimal temperature ranges without interfering with each other. All relevant water pumps (first, second, and third water pumps) are shut down, eliminating parasitic power consumption in the pipeline circulation and further reducing the static or low-load energy consumption of the vehicle. This achieves a significant reduction in the overall power consumption of the vehicle under heating conditions, thereby solving the technical problem of poor energy-saving effect in electric vehicles using heat pump air conditioning.

[0098] Optionally, such as Figure 2 As shown, under the third heat exchange strategy: electric water pump 2 does not operate, electric water pump 3 does not operate, port 1 and port 2 of three-way valve 1 are connected, port 1 and port 3 are closed, port 1 and port 2 of three-way valve 2 are connected, port 3 and port 2 are closed, port 2 and port 3 of three-way valve 3 are connected, port 2 and port 1 are closed. Since the motor temperature is not high enough, the heat from the battery can be prevented from flowing to the electric drive, ensuring that the battery temperature does not drop and the battery performance does not decrease. The performance of the motor and inverter is not greatly affected by temperature. Therefore, heat exchange between the motor and the battery is not allowed.

[0099] Optionally, after step S101e2, that is, when the water heat exchange strategy is the fourth heat exchange strategy, the electric drive control method based on heat pump air conditioning may further include the following execution steps:

[0100] Step S101e2a: Connect the battery cooling water circuit system to the electric drive cooling water circuit system;

[0101] Step S101e2b: Adjust the water pump mode in the thermal management system to the fifth water pump mode. In the fifth water pump mode, the first water pump in the heat pump air conditioning system is turned off, the second water pump in the battery cooling water circuit system is turned on, and the third water pump in the electric drive cooling water circuit system is turned on. The speed of the second water pump and the speed of the third water pump are both target speeds, and the target speed is positively correlated with the temperature difference between the second temperature and the third temperature.

[0102] In this embodiment of the invention, when the electric drive temperature is higher than the battery temperature, the water circuits of both are connected and the water pump is turned on to transfer the waste heat of the electric drive to the battery, thereby raising the battery temperature. This not only utilizes the waste heat that would otherwise be lost to the environment, but also improves the battery performance at low temperatures. Furthermore, the water pump speed is positively correlated with the temperature difference; a larger temperature difference means more waste heat can be utilized, thus accelerating the water flow to quickly raise the battery temperature or quickly remove the heat from the electric drive. A smaller temperature difference reduces the flow rate, which ensures heating efficiency while avoiding overcooling of the electric drive or underheating of the battery. This achieves precise heat distribution, thereby significantly reducing the overall vehicle power consumption under heating conditions. This solves the technical problem of poor energy-saving performance in electric vehicles using heat pump air conditioning.

[0103] Optionally, such as Figure 2 As shown, under the fourth heat exchange strategy: both electric water pump 2 and electric water pump 3 operate, and their operating speeds are similar to... and The difference between them is related; the larger the difference, the higher the speed of the two water pumps. Specifically, it is determined according to the calibration value. Ports 1 and 2 of three-way valve 1 are closed, and port 1 and port 3 are connected. Ports 1 and 2 of three-way valve 2 are connected, and port 3 and port 2 are closed. Ports 2 and 3 of three-way valve 3 are connected, and port 2 and port 1 are closed. Since the electric drive water temperature is higher than the battery water temperature, the electric drive heat is drawn to the battery to heat the battery, increase the battery temperature, increase the battery charging and discharging power, increase the battery energy recovery capability, reduce the vehicle's power consumption, and improve the vehicle's power performance. At low temperatures, the temperature reduction of the motor and inverter will not have a significant impact on the electric drive.

[0104] Table 1 is a schematic table showing the change in rotational speed of electric water pump 2 and electric water pump 3 with water temperature according to one embodiment of the present invention. As shown in Table 1, the operating speeds of electric water pump 2 (such as the second water pump) and electric water pump 3 (such as the third water pump) are as follows: and The difference between them is related; the larger the difference, the higher the speed of the two water pumps.

[0105] Table 1

[0106]

[0107] Figure 7 This is a schematic diagram of the overall framework of the control strategy according to one embodiment of the present invention, as shown below. Figure 7 As shown, the steps are as follows:

[0108] Step S701: Perform pre-calibration of the electric drive system control algorithm (such as the motor drive algorithm) to determine the efficiency characteristic data (such as motor efficiency) corresponding to different efficiency working modes.

[0109] It should be noted that different electric drive efficiency algorithms will affect the efficiency of the motor and inverter. By calibrating the electric drive system control algorithm, the efficiency MAP of the electric drive combination (motor and inverter) corresponding to different algorithms can be obtained. This application prioritizes three algorithms, corresponding to three different efficiency MAPs of the electric drive combination system.

[0110] Table 2 is a schematic table of the efficiency MAP corresponding to the electric drive algorithm according to one embodiment of the present invention. As shown in Table 2, the efficiency MAP (such as motor efficiency) corresponding to different algorithms (such as motor drive algorithm) is stored in the electric drive controller MCU and VDC. Moreover, the MCU can control the switching of different algorithms. As needed, the electric drive will execute different efficiency MAP working modes.

[0111] Table 2

[0112]

[0113] Step S702: Determine different control strategies (such as control strategy 1 and control strategy 2) based on the air conditioner's operating status.

[0114] Optionally, in step S102, when the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy, controlling the drive motor according to the first efficiency mode with the highest motor efficiency includes the following execution steps:

[0115] Step S102a: Obtain multiple motor drive algorithms pre-configured for controlling the drive motor, wherein each motor drive algorithm is pre-configured with a corresponding motor efficiency.

[0116] Step S102b: When the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy, the motor drive algorithm with the highest motor efficiency is determined as the first efficiency mode.

[0117] In this embodiment of the invention, when the heat pump does not absorb heat from the electric drive (i.e., the electric drive's heating does not contribute to the heat pump or the heat pump absorbs heat from other heat sources), the system reverts to the traditional "highest motor efficiency" control logic. By comparing the efficiency MAP (e.g., motor efficiency) of multiple preset motor drive algorithms, the algorithm with the highest motor efficiency under the current operating condition is selected. This ensures that the energy consumption of the electric drive system itself is also the lowest under non-cooperative operating conditions, providing a basic guarantee for the energy saving of the entire vehicle. This achieves the technical effect of significantly reducing the overall power consumption of the vehicle under heating conditions, thereby solving the technical problem of poor energy saving effect of the entire vehicle when heat pump air conditioning is applied in electric vehicles.

[0118] As an optional example, the electric drive efficiency mode control strategy 1 (such as the first efficiency mode) includes: The VDC interpolates the reported speed and torque from the motor according to the three efficiency MAPs (such as motor efficiency) corresponding to the three algorithms (such as motor drive algorithms) in Table 2, calculating the three efficiencies η1, η2, and η3. It then identifies the value with the highest efficiency and its corresponding control algorithm (such as the motor drive algorithm). For example, if the highest efficiency is η1, and its corresponding control algorithm is control algorithm 1 (first efficiency mode), the VDC sends efficiency control mode = 1 to the MCU. The MCU executes control algorithm 1 (first efficiency mode), ensuring the highest motor efficiency and contributing to overall energy consumption reduction. To prevent frequent changes in the motor control algorithm, this control strategy updates every Δt period (e.g., 1 minute) instead of real-time calculation and updating.

[0119] Optionally, in step S103, when the heat radiation exchange strategy is the third heat exchange strategy, controlling the drive motor according to the second efficiency mode that minimizes the total power of the heat pump air conditioning system and the drive motor includes the following execution steps:

[0120] Step S103a: Obtain multiple motor drive algorithms pre-configured for controlling the drive motor, wherein each motor drive algorithm is pre-configured with a corresponding motor efficiency.

[0121] Step S103b: When the heat radiation exchange strategy is the third heat exchange strategy, determine the total power corresponding to each motor drive algorithm based on the compressor load and motor efficiency of the drive motor in the heat pump air conditioning system.

[0122] Step S103c: The motor drive algorithm with the lowest total power is determined as the second efficiency mode.

[0123] In this embodiment of the invention, motor efficiency is no longer considered in isolation. Instead, motor efficiency is treated as a variable, and the total power corresponding to different motor efficiency algorithms is calculated. The motor drive algorithm that minimizes the total power is automatically found. This optimization algorithm based on mathematical models and real-time data can accurately quantify the impact of different motor control strategies on the energy consumption of the vehicle, select the truly most energy-efficient combination, and significantly improve the vehicle's range under low-temperature heat pump heating conditions. This achieves the technical effect of significantly reducing the overall power consumption of the vehicle under heating conditions, thereby solving the technical problem of poor energy-saving effect of electric vehicles using heat pump air conditioning.

[0124] As an optional example, the electric drive efficiency mode control strategy 2 (such as the second efficiency mode) includes: the heat pump can reduce the energy consumption of the heat pump by absorbing heat from the electric drive. The more heat is absorbed, the more energy is reduced. The lower the electric drive efficiency, the more heat is generated by the electric drive, and the more heat can be supplied to the heat pump to absorb.

[0125] Optionally, based on the compressor load and drive motor efficiency in the heat pump air conditioning system, the total power corresponding to each motor drive algorithm is determined, including: ,in, The total output power of the system is given by η, where η is the electric drive efficiency; when the heat pump absorbs heat from the electric drive system, , For the power of the heat pump air conditioning system, , For the compressor load, The electric drive heat generation power indicates that the power of the heat pump air conditioning system has a certain functional relationship with the air conditioning load and the electric drive heat generation power. This functional relationship is obtained through bench testing.

[0126] Optionally, VDC interpolates the reported speed and torque from the motor according to the three efficiency MAPs corresponding to the three algorithms in Table 1, calculating the three efficiencies η1, η2, and η3, and then substitutes these three efficiencies into the... The system output power is obtained by solving the problem. Minimum corresponding electric drive efficiency ,For example If the VDC sends efficiency control mode = 3 to the MCU, the MCU will execute control algorithm 3 (such as the second efficiency mode). Although the electric drive efficiency may not be optimal, it can ensure optimal system energy consumption, which helps to reduce overall energy consumption. To prevent frequent changes in the motor control algorithm, this control strategy updates every certain period of time Δt (e.g., 1 minute), instead of calculating and updating in real time.

[0127] Figure 8 This is a schematic diagram of an electric vehicle cryogenic energy management system according to one embodiment of the present invention. Figure 2 ,like Figure 8 The diagram illustrates a four-wheel drive system with two electric drive systems, specifically including: a thermal management system and a control system; the thermal management system includes a heat pump air conditioning system, an electric drive cooling water circuit system, and a battery cooling water circuit system; the heat pump air conditioning system includes an air conditioner chiller, an electric water pump 1, a compressor, and other related components; the electric drive cooling water circuit system includes a first motor, a first inverter, an electric water pump 3, a water temperature sensor 1, a second motor, a second inverter, and other components; the battery cooling water circuit system includes a power battery, an electric water pump 2, a three-way valve 2, a three-way valve 3, a water temperature sensor 2, and other components. The first motor and the second motor are identical, the first inverter and the second inverter are identical, and the water temperature sensor 1 and the water temperature sensor 2 are identical.

[0128] Figure 9 This is a schematic diagram of a control system according to one embodiment of the present invention. Figure 2 ,like Figure 9 As shown, for a four-wheel drive system with two electric drive systems, the control system includes: a central domain controller (VDC), a first motor controller (MCU1), a second motor controller (MCU2), a battery management system (BMS), an electronic stability control system (ESC), an air conditioning system controller (ATC), electric water pump 1, electric water pump 2, electric water pump 3, three-way valve 1, three-way valve 2, three-way valve 3, and other components.

[0129] Optionally, such as Figure 9As shown, MCU1 sends information such as the speed, torque, and system efficiency (motor-inverter combined efficiency) of the first motor to VDC; MCU2 sends information such as the speed, torque, and system efficiency (motor-inverter combined efficiency) of the second motor to VDC; VDC comprehensively judges the vehicle status and assembly status, and sends the first motor efficiency mode command to MCU1 and the second motor efficiency mode command to MCU2; BMS sends information such as battery SOC and charging / discharging power to VDC; ESC sends information such as vehicle speed, acceleration, and deceleration to VDC; air conditioning... The controller (ATC) sends the ambient temperature, air conditioner operating status, and heat pump heat absorption request status to the VDC; water temperature sensor 1 sends the water temperature information of the second electric drive outlet to the VDC; water temperature sensor 2 sends the water temperature information of the power battery outlet to the VDC; the VDC sends the speed command of electric water pump 1 to electric water pump 1, the speed command of electric water pump 2 to electric water pump 2, and the speed command of electric water pump 3 to electric water pump 3; the VDC sends the opening and closing commands of three-way valve 1, three-way valve 2, and three-way valve 3 to three-way valve 1, three-way valve 2, and three-way valve 3 respectively.

[0130] As an optional embodiment, for a four-wheel drive system with two electric drive systems, the overall architecture of the control strategy is the same as... Figure 4 The control strategies shown are similar, and the specific steps are as follows:

[0131] Step S411: Perform the calibration of the control algorithms for the two electric drive systems in advance to determine the efficiency characteristic data corresponding to different efficiency operating modes.

[0132] It should be noted that different electric drive efficiency algorithms will affect the efficiency of the motor and inverter. By calibrating the electric drive system control algorithm, the efficiency MAP of the electric drive combination (motor and inverter) corresponding to different algorithms can be obtained. The first electric drive and the second electric drive are exactly the same. This application prioritizes three algorithms, corresponding to three different efficiency MAPs of the electric drive combination system.

[0133] Table 3 is a schematic table of efficiency MAPs corresponding to the electric drive algorithm according to one embodiment of the present invention. As shown in Table 3, the efficiency MAPs corresponding to different algorithms are stored in the electric drive controllers MCU1, MCU2 and VDC respectively. Moreover, MCU1 and MCU2 can control the switching of different algorithms. They can switch to different algorithms as needed. The first electric drive and the second electric drive execute the corresponding efficiency MAP working mode according to the control algorithm.

[0134] Table 3

[0135]

[0136] Step S412: Determine different control strategies based on the air conditioner's operating status.

[0137] Optionally, for a four-wheel drive system with two electric drive systems, the control strategy is executed as follows: Figure 5 The execution control strategies shown are the same, such as Figure 5 As shown, the default control strategy is 1. When the air conditioner is turned on and the heat pump has a heat absorption request, the control strategy is switched to 2. In the control strategy 2 mode, if the air conditioner is turned off or the heat pump has no heat absorption request, the control strategy is switched back to 1.

[0138] Optionally, control strategy 1 includes an electric drive battery heat exchange strategy and an electric drive efficiency mode control strategy 1. Control strategy 2 includes a heat pump heat absorption strategy. The heat pump heat absorption strategy includes three types: heat pump absorbing heat from the air source, heat pump absorbing heat from the electric drive, and heat pump absorbing heat from the power battery. When the heat pump absorbs heat from the air source or from the power battery, both electric drive efficiency modes are executed according to electric drive efficiency mode control strategy 1. When the heat pump absorbs heat from the electric drive, both electric drive efficiency modes are executed according to electric drive efficiency mode control strategy 2.

[0139] Optionally, for a four-wheel drive system with two electric drive systems, the electric drive battery heat exchange strategy and Figure 6 The heat exchange strategy for the electric drive battery shown is the same, such as Figure 6 As shown, by default, the electric drive battery does not perform heat exchange (state one). When the water temperature sensor 1 reports the water temperature... > (Water temperature reported by water temperature sensor 2) +δT (preferably 5℃), the electric drive battery performs heat exchange (corresponding to state two), when The electric drive battery does not undergo heat exchange.

[0140] Optionally, such as Figure 8 As shown, in the above-mentioned state one mode: electric water pump 2 does not operate, electric water pump 3 does not operate, port 1 and port 2 of three-way valve 1 are connected, port 1 and port 3 are closed, port 1 and port 2 of three-way valve 2 are connected, port 3 and port 2 are closed, port 2 and port 3 of three-way valve 3 are connected, port 2 and port 1 are closed. In this state, since the motor temperature is not high enough, the heat from the battery can be prevented from flowing to the electric drive, ensuring that the battery temperature does not drop and the battery performance does not drop. The performance of the motor and inverter is not greatly affected by temperature. Therefore, in this mode, the motor and battery are not allowed to exchange heat.

[0141] Optionally, such as Figure 8 As shown, both electric water pump 2 and electric water pump 3 are operating, and their operating speeds are the same as those of electric water pump 3. , The difference is related to the speed of the two water pumps. The larger the difference, the higher the speed of the two water pumps. The specific speed is determined according to the calibration value. Port 1 and port 2 of three-way valve 1 are closed and port 1 and port 3 are connected. Port 1 and port 2 of three-way valve 2 are connected and port 3 and port 2 are closed. Port 2 and port 3 of three-way valve 3 are connected and port 2 and port 1 are closed. In this state, since the water temperature of the electric drive system is higher than that of the battery, the heat of the electric drive is drawn to the battery to heat the battery, increase the battery temperature, increase the battery charging and discharging power, increase the battery energy recovery capability, reduce the overall vehicle power consumption, and improve the overall vehicle power performance. At low temperatures, the temperature drop of the motor and inverter will not have a significant impact on the electric drive.

[0142] Table 4 is a schematic table showing the change in rotational speed of electric water pump 2 and electric water pump 3 with water temperature according to one embodiment of the present invention. As shown in Table 4, the operating speeds of electric water pump 2 and electric water pump 3 are related to water temperature. and The difference between them is related; the larger the difference, the higher the speed of the two water pumps.

[0143] Table 4

[0144]

[0145] Optionally, for a four-wheel drive system with two electric drive systems, the heat pump heat absorption strategy and Figure 7 The heat pump heat absorption strategy shown is the same, such as Figure 7 As shown, the default heat pump absorbs heat from the water source, when the conditions are met... At this time, the heat pump enters the air source heat absorption mode (such as the first heat exchange strategy), where, The third temperature reported by temperature sensor 1 The second temperature reported by temperature sensor 2. The ambient temperature (e.g., the first temperature) is preferred to be 5℃.

[0146] Optionally, such as Figure 7 As shown, when the following conditions are met At this time, the heat pump enters the mode of absorbing heat from the water source.

[0147] Optionally, such as Figure 7 As shown, in the heat pump heat absorption mode from the water source, the default mode is to switch to heat pump heat absorption mode from the electric drive (such as the third heat exchange strategy). When the conditions are met... (Preferred temperature 5°C), enters the heat pump mode to absorb heat from the power battery (such as the second heat exchange strategy), when the condition is met. The heat pump then enters the electric drive heat absorption mode (such as the third heat exchange strategy).

[0148] By implementing the above control strategy, the heat pump can absorb heat from a higher-temperature heat source, thereby reducing the energy consumption of the heat pump system and the overall vehicle power consumption.

[0149] Optionally, such as Figure 8 As shown, in the heat pump's air-source heat absorption mode: electric water pump 1 operates, and its speed is related to the load of the heat pump air conditioner compressor. The greater the load, the higher the speed of electric water pump 1, which is determined by the calibration value. Electric water pumps 2 and 3 do not operate. Port 1 and port 2 of three-way valve 1 are connected, and port 1 and port 3 are closed. Port 3 and port 2 of three-way valve 2 are connected, and port 1 and port 2 are closed. Port 2 and port 1 of three-way valve 3 are connected, and port 2 and port 3 are closed.

[0150] Optionally, such as Figure 8 As shown, in the heat pump's electric drive heat absorption mode: electric water pump 2 does not operate; the speed of electric water pump 1 is related to the load of the heat pump air conditioner compressor. The greater the load, the higher the speed of electric water pump 1, which is determined by the calibration value; electric water pump 3 operates; the speed of electric water pump 3 is related to the sum of the power of the two motors. The greater the sum of the power of the two motors, the higher the speed of electric water pump 3, which is determined by the calibration value; ports 1 and 2 of three-way valve 1 are closed, and ports 1 and 3 are connected; ports 1 and 3 of three-way valve 2 are connected, and ports 1 and 2 are closed; ports 2 and 1 of three-way valve 3 are closed, and ports 1 and 3 are connected.

[0151] Optionally, such as Figure 8 As shown, in the heat pump's heat absorption mode from the power battery: electric water pump 3 does not operate; the speed of electric water pump 1 is related to the load of the heat pump air conditioner compressor; the greater the load, the higher the speed of electric water pump 1, which is determined by the calibration value; electric water pump 2 operates; the speed of electric water pump 2 is related to the discharge power of the power battery; the greater the discharge power of the power battery, the higher the speed of electric water pump 2, which is determined by the calibration value; ports 1 and 2 of three-way valve 1 are connected, and port 1 and 3 are closed; ports 3 and 2 of three-way valve 2 are connected, and ports 1 and 2 are closed; ports 2 and 1 of three-way valve 3 are connected, and ports 2 and 3 are closed.

[0152] As an optional example, the electric drive efficiency mode control strategy 1 includes: The VDC, based on the speed and torque reported by the first and second motors respectively, interpolates according to the three efficiency MAPs corresponding to the two motors in Table 3, calculating the three efficiencies η1_1, η1_2, and η1_3 for the first motor system and η2_1, η2_2, and η2_3 for the second motor system. It then identifies the maximum efficiency values ​​and corresponding control algorithms for the first and second motor systems. For example, if the control algorithm corresponding to the maximum efficiency of the first motor system is control algorithm 1_1, the VDC sends this efficiency control mode instruction to MCU1, and MCU1 executes control algorithm 1_1. Similarly, if the control algorithm corresponding to the maximum efficiency of the second motor system is control algorithm 1_2, the VDC sends this efficiency control mode instruction to MCU2, and MCU2 executes control algorithm 1_2. This ensures the highest efficiency for both motors, contributing to overall energy consumption reduction. To prevent frequent changes in the motor control algorithm, this control strategy updates the algorithm every Δt (e.g., every minute) instead of calculating and updating in real-time.

[0153] As an optional example, electric drive efficiency mode control strategy 2 includes: the heat pump absorbs heat from the electric drive, which reduces the heat pump's energy consumption; the more heat absorbed, the greater the energy consumption reduction; the lower the electric drive efficiency, the more heat the electric drive generates, and the more heat can be supplied to the heat pump. (Heat pump air conditioning system power) (Formula 1_1) indicates that the power of the heat pump air conditioning system has a certain functional relationship with the sum of the air conditioning load, the first electric drive, and the second electric drive heat generation power. This functional relationship can be obtained through bench testing. (Formula 2_1), where η1 is the first electric drive efficiency. (Formula 2_2), η2 is the second electric drive efficiency, which is the system output power when the heat pump absorbs heat from the electric drive system. (Formula 3_1) Combining Formulas 1_1, 2_1, 2_2, and 3_1 above, the system output power can be obtained. (Formula 4_1) Based on the speed and torque reported by the first motor, VDC interpolates according to the three efficiency MAPs corresponding to the three algorithms in Table 3 to calculate three efficiencies η1_1, η1_2, and η1_3. Based on the speed and torque reported by the second motor, VDC interpolates according to the three efficiency MAPs corresponding to the three algorithms in Table 3 to calculate three efficiencies η2_1, η2_2, and η2_3. The first motor and the second motor each have three efficiencies, resulting in nine efficiency combinations. Substituting these nine efficiency combinations into Formula 4_1, the minimum corresponding system output power P_total2 is obtained. Given the electric drive efficiency combination (η1_1, η2_1), for example (η1_1, η2_1), we identify the corresponding efficiency mode control algorithms. For instance, the first motor corresponds to the first efficiency mode control algorithm, and the second motor corresponds to the first efficiency mode control algorithm. Then, VDC sends the efficiency mode control algorithm corresponding to the first motor to MCU1 and the efficiency mode control algorithm corresponding to the second motor to MCU2. MCU1 and MCU2 execute the control algorithm requirements sent by VDC. Although the electric drive efficiency may not be optimal, this ensures optimal system energy consumption, which helps reduce overall energy consumption. To prevent frequent changes in motor control algorithms, this control strategy updates the algorithm every certain period of time Δt (e.g., 1 minute), instead of calculating and updating in real time.

[0154] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0155] This embodiment also provides an electric drive control device based on a heat pump air conditioner, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0156] Figure 10 This is a structural block diagram of an electric drive control device based on a heat pump air conditioner according to one embodiment of the present invention, such as... Figure 10As shown, an electric drive control device 1000 based on a heat pump air conditioner is used as an example. The device includes: an acquisition module 1001, used to acquire the heat radiation exchange strategy of the heat pump air conditioner system in the electric vehicle, wherein the heat radiation exchange strategy includes: a first heat exchange strategy representing the heat pump in the heat pump air conditioner system absorbing heat from the air, a second heat exchange strategy representing the heat pump absorbing heat from the power battery, and a third heat exchange strategy representing the heat pump absorbing heat from the drive motor; a first control module 1002, used to control the drive motor according to a first efficiency mode with the highest motor efficiency when the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy; and a second control module 1003, used to control the drive motor according to a second efficiency mode with the lowest total power of the heat pump air conditioner system and the drive motor when the heat radiation exchange strategy is the third heat exchange strategy, wherein the total power is determined based on the load of the heat pump air conditioner system and the motor efficiency of the drive motor.

[0157] In this embodiment of the invention, based on the heat exchange method of the heat pump in the heat pump air conditioning system, the most efficient heat radiation exchange strategy can be intelligently selected according to the actual heat source temperature. This avoids the high energy consumption caused by forcibly absorbing heat when the heat source temperature is extremely low, thus improving the economic efficiency of system operation. Furthermore, for different heat radiation exchange strategies, a corresponding efficiency control mode can be selected to control the drive motor. This efficiency control mode does not simply pursue the highest efficiency of the motor, but rather aims to minimize the total power of the "heat pump air conditioning system + drive motor". It allows the drive motor to operate in a lower efficiency range to increase heat generation, thereby improving the heat absorption efficiency of the heat pump and reducing the power consumption of the heat pump compressor. This avoids the defect of focusing only on the efficiency of the drive motor or only on the efficiency of the heat pump, which leads to suboptimal vehicle energy consumption. It achieves the goal of ensuring an overall balance between the losses on the drive motor side and the energy consumption on the heat pump side, thus achieving the technical effect of significantly reducing the overall vehicle power consumption under heating conditions. This solves the technical problem of poor energy-saving effect of electric vehicles using heat pump air conditioning.

[0158] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0159] Embodiments of the present invention also provide a vehicle for performing the steps in any of the above embodiments of the electric drive control method based on heat pump air conditioning.

[0160] Embodiments of the present invention also provide a computer-readable storage medium storing a computer program, wherein the computer program is configured to execute the steps in any of the embodiments of the electric drive control method based on heat pump air conditioning when run on a computer or processor.

[0161] Optionally, in this embodiment, the computer-readable storage medium may be configured to store a computer program for performing the following steps:

[0162] Step S1: Obtain the heat radiation exchange strategy of the heat pump air conditioning system in the electric vehicle. The heat radiation exchange strategy includes: a first heat exchange strategy that represents the heat pump in the heat pump air conditioning system absorbing heat from the air, a second heat exchange strategy that represents the heat pump absorbing heat from the power battery, and a third heat exchange strategy that represents the heat pump absorbing heat from the drive motor.

[0163] Step S2: When the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy, control the drive motor according to the first efficiency mode with the highest motor efficiency.

[0164] Step S3: When the heat radiation exchange strategy is the third heat exchange strategy, control the drive motor according to the second efficiency mode that minimizes the total power of the heat pump air conditioning system and the drive motor. The total power is determined based on the load of the heat pump air conditioning system and the motor efficiency of the drive motor.

[0165] Optionally, in this embodiment, the computer-readable storage medium may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0166] Embodiments of the present invention also provide an electronic device, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the steps in any of the above embodiments of the electric drive control method based on a heat pump air conditioner.

[0167] Optionally, in this embodiment, the processor in the above-described electronic device may be configured to run a computer program to perform the following steps:

[0168] Step S1: Obtain the heat radiation exchange strategy of the heat pump air conditioning system in the electric vehicle. The heat radiation exchange strategy includes: a first heat exchange strategy that represents the heat pump in the heat pump air conditioning system absorbing heat from the air, a second heat exchange strategy that represents the heat pump absorbing heat from the power battery, and a third heat exchange strategy that represents the heat pump absorbing heat from the drive motor.

[0169] Step S2: When the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy, control the drive motor according to the first efficiency mode with the highest motor efficiency.

[0170] Step S3: When the heat radiation exchange strategy is the third heat exchange strategy, control the drive motor according to the second efficiency mode that minimizes the total power of the heat pump air conditioning system and the drive motor. The total power is determined based on the load of the heat pump air conditioning system and the motor efficiency of the drive motor.

[0171] Embodiments of the present invention also provide a computer program product, including a computer program that, when executed by a processor, implements the steps in any of the above embodiments of the electric drive control method based on a heat pump air conditioner.

[0172] Optionally, in this embodiment, the computer program in the above-described computer program product can be configured to perform the following steps when executed by a processor:

[0173] Step S1: Obtain the heat radiation exchange strategy of the heat pump air conditioning system in the electric vehicle. The heat radiation exchange strategy includes: a first heat exchange strategy that represents the heat pump in the heat pump air conditioning system absorbing heat from the air, a second heat exchange strategy that represents the heat pump absorbing heat from the power battery, and a third heat exchange strategy that represents the heat pump absorbing heat from the drive motor.

[0174] Step S2: When the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy, control the drive motor according to the first efficiency mode with the highest motor efficiency.

[0175] Step S3: When the heat radiation exchange strategy is the third heat exchange strategy, control the drive motor according to the second efficiency mode that minimizes the total power of the heat pump air conditioning system and the drive motor. The total power is determined based on the load of the heat pump air conditioning system and the motor efficiency of the drive motor.

[0176] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0177] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0178] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0179] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0180] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0181] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0182] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0183] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for controlling an electric drive based on a heat pump air conditioner, characterized by, include: The heat radiation exchange strategy of the heat pump air conditioning system in an electric vehicle is obtained, wherein the heat radiation exchange strategy includes: a first heat exchange strategy representing the heat pump in the heat pump air conditioning system absorbing heat from the air, a second heat exchange strategy representing the heat pump absorbing heat from the power battery, and a third heat exchange strategy representing the heat pump absorbing heat from the drive motor. When the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy, the drive motor is controlled according to the first efficiency mode with the highest motor efficiency. When the heat radiation exchange strategy is the third heat exchange strategy, the drive motor is controlled according to the second efficiency mode that minimizes the total power of the heat pump air conditioning system and the drive motor, wherein the total power is determined based on the load of the heat pump air conditioning system and the motor efficiency of the drive motor.

2. The method according to claim 1, characterized in that, The heat exchange strategies for heat pump air conditioning systems in electric vehicles include: The temperature parameters in the thermal management system of the electric vehicle are collected. The thermal management system includes at least: the heat pump air conditioning system, the battery cooling water system and the electric drive cooling water system. The temperature parameters include: a first temperature in the heat pump air conditioning system, a second temperature in the battery cooling water system and a third temperature in the electric drive cooling water system. If the first temperature is greater than the second temperature and the first temperature is greater than the third temperature, then the heat radiation exchange strategy is determined to be the first heat exchange strategy. If the second temperature is greater than the first temperature and the second temperature is greater than the third temperature, then the heat radiation exchange strategy is determined to be the second heat exchange strategy. If the third temperature is greater than the first temperature and the third temperature is greater than the second temperature, then the heat radiation exchange strategy is determined to be the third heat exchange strategy.

3. The method according to claim 2, characterized in that, When the heat radiation exchange strategy is the first heat exchange strategy, the method further includes: Disconnect the connection between the heat pump air conditioning system and the water system, wherein the water system includes: the battery cooling water system and the electric drive cooling water system; The water pump mode in the thermal management system is adjusted to the first water pump mode, wherein, in the first water pump mode, the first water pump in the heat pump air conditioning system is turned on, the second water pump in the battery cooling water circuit system is turned off, and the third water pump in the electric drive cooling water circuit system is turned off, and the speed of the first water pump is positively correlated with the load of the compressor corresponding to the heat pump air conditioning system.

4. The method according to claim 2, characterized in that, When the heat radiation exchange strategy is the second heat exchange strategy, the method further includes: Connect the heat pump air conditioning system to the battery cooling water circuit system, and disconnect the connection between the heat pump air conditioning system and the electric drive cooling water circuit system; The water pump mode in the thermal management system is adjusted to the second water pump mode. In the second water pump mode, the first water pump in the heat pump air conditioning system is turned on, the second water pump in the battery cooling water circuit system is turned on, and the third water pump in the electric drive cooling water circuit system is turned off. The speed of the first water pump is positively correlated with the load of the compressor corresponding to the heat pump air conditioning system, and the speed of the second water pump is positively correlated with the discharge power of the power battery corresponding to the battery cooling water circuit system.

5. The method according to claim 2, characterized in that, When the heat radiation exchange strategy is the third heat exchange strategy, the method further includes: Connect the heat pump air conditioning system to the electric drive cooling water circuit system, and disconnect the connection between the heat pump air conditioning system and the battery cooling water circuit system; The water pump mode in the thermal management system is adjusted to the third water pump mode. In the third water pump mode, the first water pump in the heat pump air conditioning system is turned on, the second water pump in the battery cooling water circuit system is turned off, and the third water pump in the electric drive cooling water circuit system is turned on. The speed of the first water pump is positively correlated with the load of the compressor corresponding to the heat pump air conditioning system, and the speed of the third water pump is positively correlated with the motor power of the drive motor corresponding to the electric drive cooling water circuit system.

6. The method according to claim 2, characterized in that, After collecting temperature parameters from the thermal management system of the electric vehicle, the method further includes: Check whether the heat pump air conditioning system is turned on; After the heat pump air conditioning system is turned on, the heat radiation exchange strategy is determined; When the heat pump air conditioning system is not turned on, a water circuit heat exchange strategy is determined for heat exchange between the battery cooling water circuit system and the electric drive cooling water circuit system.

7. The method according to claim 6, characterized in that, When the heat pump air conditioning system is not turned on, the water circuit heat exchange strategy for determining heat exchange between the battery cooling water circuit system and the electric drive cooling water circuit system includes: If the third temperature is not greater than the second temperature, the water circuit heat exchange strategy is determined to be the third heat exchange strategy, wherein, under the third heat exchange strategy, the battery cooling water circuit system and the electric drive cooling water circuit system do not exchange heat. If the third temperature is greater than the second temperature, the water circuit heat exchange strategy is determined to be a fourth heat exchange strategy, wherein, under the fourth heat exchange strategy, the battery cooling water circuit system and the electric drive cooling water circuit system exchange heat.

8. The method according to claim 7, characterized in that, When the water-channel heat exchange strategy is the third heat exchange strategy, the method further includes: Disconnect the battery cooling water circuit system from the electric drive cooling water circuit system; The water pump mode in the thermal management system is adjusted to the fourth water pump mode, wherein, in the fourth water pump mode, the first water pump in the heat pump air conditioning system is turned off, the second water pump in the battery cooling water circuit system is turned off, and the third water pump in the electric drive cooling water circuit system is turned off.

9. The method according to claim 7, characterized in that, When the water-channel heat exchange strategy is the fourth heat exchange strategy, the method further includes: Connect the battery cooling water circuit system to the electric drive cooling water circuit system; The water pump mode in the thermal management system is adjusted to the fifth water pump mode. In the fifth water pump mode, the first water pump in the heat pump air conditioning system is turned off, the second water pump in the battery cooling water circuit system is turned on, and the third water pump in the electric drive cooling water circuit system is turned on. The rotational speed of the second water pump and the rotational speed of the third water pump are both target rotational speeds. The target rotational speed is positively correlated with the temperature difference between the second temperature and the third temperature.

10. The method according to claim 1, characterized in that, When the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy, controlling the drive motor according to the first efficiency mode with the highest motor efficiency includes: Obtain a plurality of motor drive algorithms with a preset configuration for controlling the drive motor, wherein each motor drive algorithm is pre-configured with a corresponding motor efficiency; When the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy, the motor drive algorithm with the highest motor efficiency is determined as the first efficiency mode.

11. The method according to claim 1, characterized in that, When the heat radiation exchange strategy is the third heat exchange strategy, controlling the drive motor according to the second efficiency mode that minimizes the total power of the heat pump air conditioning system and the drive motor includes: Obtain a plurality of motor drive algorithms with a preset configuration for controlling the drive motor, wherein each motor drive algorithm is pre-configured with a corresponding motor efficiency; When the heat radiation exchange strategy is the third heat exchange strategy, the total power corresponding to each motor drive algorithm is determined based on the compressor load and the motor efficiency of the drive motor in the heat pump air conditioning system. The motor drive algorithm with the lowest total power is determined as the second efficiency mode.

12. An electric drive control device based on a heat pump air conditioner, characterized in that, include: The acquisition module is used to acquire the heat radiation exchange strategy of the heat pump air conditioning system in the electric vehicle, wherein the heat radiation exchange strategy includes: a first heat exchange strategy representing the heat pump in the heat pump air conditioning system absorbing heat from the air, a second heat exchange strategy representing the heat pump absorbing heat from the power battery, and a third heat exchange strategy representing the heat pump absorbing heat from the drive motor. The first control module is used to control the drive motor according to the first efficiency mode with the highest motor efficiency when the heat radiation exchange strategy is the first heat exchange strategy or the second heat exchange strategy. The second control module is used to control the drive motor according to a second efficiency mode that minimizes the total power of the heat pump air conditioning system and the drive motor when the heat radiation exchange strategy is the third heat exchange strategy, wherein the total power is determined based on the load of the heat pump air conditioning system and the motor efficiency of the drive motor.

13. An electronic device, characterized in that, include: A memory and a processor, the processor being configured to run a program stored in the memory, wherein the program, when running, executes the electric drive control method for a heat pump air conditioner according to any one of claims 1 to 11.

14. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the electric drive control method based on heat pump air conditioning as described in any one of claims 1 to 11.

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