Energy recovery control method and related device

Abstract

The embodiment of the invention discloses an energy recovery control method. The method comprises the steps that the battery charge state and the battery temperature of a battery of a vehicle are obtained; calculating the charging power of the battery according to the battery charge state and the battery temperature; determining a first operation condition of the vehicle according to the vehicle state information of the vehicle; according to the first operation working condition, the energy recovery power of a motor system of the vehicle under the first operation working condition is calculated; and in response to determining that the energy recovery power is greater than the charging power, controlling the motor system of the vehicle to work in a second operation condition. When the charging efficiency of the battery is not enough to receive the energy recovery efficiency of the motor system, the operation condition of the motor system is changed, so that the motor system operates at lower motor working efficiency, the power consumption of the motor system is improved, and the energy recovery efficiency of the motor system is reduced; the charging efficiency of the battery is matched with the energy recovery efficiency of the motor system, so that the deceleration capability of the vehicle is maintained.

Description

Technical Field

[0001] This application relates to the technical field of new energy vehicles, and particularly to an energy recovery control method and related device. Background Art

[0002] New energy vehicles have advantages such as low emissions, low noise, and high energy utilization rate compared to traditional fuel vehicles. An important reason is that new energy vehicles can achieve energy recovery.

[0003] When a new energy vehicle is in a decelerating coasting or braking working condition, the drive motor stops supplying current. At the same time, the inertia of the vehicle's forward movement causes the motor rotor to continue rotating, generating electricity by the motor rotor. Then, the motor controller stores the electricity generated by the motor rotor into the battery through the drive motor to achieve energy recovery. At the same time, the electricity generated by the motor rotor provides resistance to the motor rotor, improving the vehicle's deceleration ability.

[0004] However, when the charging capacity of the battery in the vehicle is limited, such as when the battery is fully charged or the battery operating temperature is too high, the charging power of the battery is less than the power of energy recovery during vehicle decelerating coasting or braking, resulting in a decrease in the resistance received by the motor rotor, thereby causing a decrease in the vehicle's deceleration ability, failing to meet the driver's expectation for vehicle deceleration, and reducing the driver's driving experience and the driving safety of the vehicle. Summary of the Invention

[0005] To solve the above technical problems, this application provides an energy recovery control method and related device. According to the operating conditions of the vehicle and the real-time status of the battery in the vehicle, compare the charging capacity of the battery with the power output during energy recovery, and by changing the working mode of the motor in the vehicle motor system, enable the charging power of the vehicle to meet the power recovered during braking, and improve the vehicle's deceleration ability.

[0006] The embodiments of this application disclose the following technical solutions:

[0007] In a first aspect, the embodiments of this application disclose an energy recovery control method, and the method includes:

[0008] Obtain the state of charge and battery temperature of the vehicle's battery;

[0009] Determine the charging power of the battery according to the state of charge and the battery temperature;

[0010] Determine the first operating condition of the vehicle according to the vehicle state information of the vehicle;

[0011] Calculate the energy recovery power of the vehicle's motor system under the first operating condition according to the first operating condition;

[0012] In response to determining that the energy recovery power is greater than the charging power, control the motor system of the vehicle to operate in a second operating condition; the motor operating efficiency of the motor system operating in the second operating condition is lower than the motor operating efficiency of the motor system operating in the first operating condition.

[0013] Optionally, the motor system includes a main drive motor and an integrated starter generator; one end of the main drive motor is connected to the battery, and the other end of the main drive motor is connected to the wheel end of the vehicle; one end of the integrated starter generator is connected to the battery, and the other end of the integrated starter generator is connected to the engine and is also connected to the wheel end.

[0014] Optionally, the step of in response to determining that the energy recovery power is greater than the charging power and controlling the motor system of the vehicle to operate in a second operating condition includes:

[0015] In response to determining that the energy recovery power is greater than the charging power and the engine is in an unoperated state, control the main drive motor and the integrated starter generator to change their operating conditions so that the motor system of the vehicle operates in a second operating condition.

[0016] Optionally, the method further includes:

[0017] In response to determining that the energy recovery power is greater than the charging power and the engine is in an unoperated state, control the first output torque transmitted by the integrated starter generator to the engine to be less than a preset torque.

[0018] Optionally, the method further includes:

[0019] In response to determining that the energy recovery power is greater than the charging power and the engine is in an operated state, control the integrated starter generator to output a second output torque opposite to that of the engine; the power consumed by the motor of the integrated starter generator is greater than the energy recovery power.

[0020] Optionally, the method further includes:

[0021] In response to determining that the difference between the energy recovery power and the charging power is greater than a first preset power and the power-consuming components of the vehicle are in an operating state, increase the power consumption of the power-consuming components to a preset power consumption.

[0022] Optionally, the method further includes:

[0023] In response to determining that the difference between the energy recovery power and the charging power is greater than a second preset power, and the difference between the battery temperature and the preset battery operating temperature is greater than a preset temperature threshold, heating or cooling is performed to control the change of the battery temperature, so that the difference between the battery temperature and the preset battery operating temperature is less than the preset temperature threshold.

[0024] In a second aspect, an embodiment of the present application discloses a coasting energy recovery control device, and the device includes:

[0025] A battery state acquisition unit, configured to acquire the state of charge and the battery temperature of the vehicle's battery;

[0026] A charging power calculation unit, configured to determine the charging power of the battery according to the state of charge and the battery temperature;

[0027] An operating condition determination unit, configured to determine a first operating condition of the vehicle according to the vehicle state information of the vehicle;

[0028] A recovery power calculation unit, configured to calculate the energy recovery power of the vehicle's motor system under the first operating condition according to the first operating condition;

[0029] An operating condition control unit, configured to control the vehicle's motor system to operate in a second operating condition in response to determining that the energy recovery power is greater than the charging power; the motor operating efficiency of the motor system operating in the second operating condition is lower than the motor operating efficiency of the motor system operating in the first operating condition.

[0030] Optionally, the motor system includes a main drive motor and an integrated starter generator; one end of the main drive motor is connected to the battery, and the other end of the main drive motor is connected to the wheel end of the vehicle; one end of the integrated starter generator is connected to the battery, and the other end of the integrated starter generator is connected to the engine and is connected to the wheel end.

[0031] Optionally, the operating condition control unit is further configured to:

[0032] In response to determining that the energy recovery power is greater than the charging power and the engine is in an unoperated state, control the main drive motor and the integrated starter generator to change the operating condition, so that the vehicle's motor system operates in a second operating condition.

[0033] Optionally, the device further includes:

[0034] A first torque control unit, configured to control a first output torque transmitted by the integrated starter generator to the engine to be less than a preset torque in response to determining that the energy recovery power is greater than the charging power and the engine is in an unoperated state.

[0035] Optionally, the device further includes:

[0036] A first torque control unit, configured to control a second output torque opposite to the engine by the integrated starter generator in response to determining that the energy recovery power is greater than the charging power and the engine is in an operating state; a power consumption of the motor of the integrated starter generator is greater than the energy recovery power.

[0037] Optionally, the device further includes:

[0038] A power-consuming component control unit, configured to increase a power consumption of the power-consuming component to a preset power consumption in response to determining that a difference between the energy recovery power and the charging power is greater than a first preset power and the power-consuming component of the vehicle is in an operating state.

[0039] Optionally, the device further includes:

[0040] A battery temperature control unit, configured to control a change in the battery temperature by heating or cooling in response to determining that a difference between the energy recovery power and the charging power is greater than a second preset power and a difference between the battery temperature and a preset battery operating temperature is greater than a preset temperature threshold, so that the difference between the battery temperature and the preset battery operating temperature is less than the preset temperature threshold.

[0041] In a third aspect, an embodiment of the present application discloses a computer device, which includes a processor and a memory:

[0042] The memory is configured to store program code and transmit the program code to the processor;

[0043] The processor is configured to execute the energy recovery control method as described in the first aspect and any optional item of the first aspect according to instructions in the program code.

[0044] In a fourth aspect, an embodiment of the present application discloses a computer-readable storage medium, which is configured to store a computer program, and the computer program is configured to execute the energy recovery control method as described in the first aspect and any optional item of the first aspect when being executed by a processor.

[0045] As can be seen from the above technical solution, the state of charge and the battery temperature of the vehicle's battery are obtained; according to the state of charge and the battery temperature of the battery, the charging power of the battery is calculated; according to the vehicle state information of the vehicle, the first operating condition of the vehicle is determined; according to the first operating condition, the energy recovery power of the motor system of the vehicle under the first operating condition is calculated; in response to determining that the energy recovery power is greater than the charging power, the motor system of the vehicle is controlled to operate in a second operating condition; the motor operating efficiency of the motor system operating in the second operating condition is lower than the motor operating efficiency of the motor system operating in the first operating condition. That is, when the charging efficiency of the battery is not sufficient to receive the energy recovery efficiency of the motor system, the operating condition of the motor system is changed, so that the motor system operates at a lower motor operating efficiency, thereby increasing the power consumption of the motor system itself, reducing the energy recovery efficiency of the motor system, and matching the charging efficiency of the battery with the energy recovery efficiency of the motor system, so as to maintain the deceleration ability of the vehicle, improve the driving experience of the driver, and improve the driving safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0047] Figure 1 It is a flowchart of an energy recovery control method provided by an embodiment of the present application;

[0048] Figure 2 It is a schematic diagram of the hardware application of an energy recovery control method provided by an embodiment of the present application;

[0049] Figure 3 It is a structural block diagram of an energy recovery control device provided by an embodiment of the present application;

[0050] Figure 4 It is a structural block diagram of a computer device for energy recovery control provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] In order to enable those skilled in the art to better understand the solution of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments.

[0052] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, which is merely a way of distinguishing objects with the same attributes when describing the embodiments of this application.

[0053] New energy vehicles include types such as pure electric vehicles, hybrid vehicles, and hydrogen energy vehicles, and their market share is increasing. In order to improve energy use efficiency and the endurance of vehicles, current new energy vehicles mostly drive by configuring a motor system composed of multiple motors and combining multiple power sources. For example, power is provided to the vehicle by the battery and the engine simultaneously, enabling new energy vehicles to have advantages such as quick power response and fast response.

[0054] Since new energy vehicles are equipped with motors and batteries, when the vehicle is in operating conditions such as decelerating and coasting or braking, the drive motor stops supplying drive energy. At the same time, the motor rotor continues to rotate due to the inertia of the vehicle's forward movement. The motor can generate electricity due to the rotation of the rotor and charge the battery with the generated electric energy. While generating electricity, resistance is provided to the rotation of the rotor, thereby recovering the kinetic energy of the vehicle during decelerating and coasting or braking and achieving vehicle deceleration, improving the endurance of the whole vehicle while ensuring the deceleration feeling of the whole vehicle.

[0055] However, when the charging capacity of the battery is limited, for example, when the battery is fully charged or the working temperature of the battery is too high or too low, the charging power that the battery can reach is less than the energy recovery power that the motor rotor can provide. At this time, the battery charging power will affect the energy recovery power, causing the power of the motor rotor to generate electricity to decrease, resulting in a decrease in the resistance provided to the rotor during the power generation process, and the deceleration ability of the vehicle also decreases accordingly, thus failing to meet the driver's expectation for deceleration and reducing the driver's driving experience. Even if certain psychological expectations are provided to the driver through text prompts or other means, the decline in the driving experience still exists. At the same time, in vehicle driving conditions such as long downhill slopes, if the charging capacity is limited and the deceleration ability of the vehicle decreases, the braking system needs to be used for a long time to maintain a stable vehicle speed, which is likely to cause the braking system to overheat and be damaged, thereby reducing the driving safety of the vehicle.

[0056] To solve the above technical problems, the embodiments of this application provide an energy recovery control method and related device. By comparing the charging power of the battery with the real-time energy recovery power of the vehicle, when the charging power of the battery is lower than the energy recovery power of the vehicle, by changing the operating conditions of the motor system, the motor system consumes the excess energy by itself, and then transfers the remaining energy to the battery in the form of electricity generation for storage, so as to achieve the purpose of ensuring the deceleration performance of the vehicle.

[0057] Next, in conjunction with the accompanying drawings, an energy recovery control method provided by an embodiment of the present application will be introduced. It can be understood that this method can be applied to a control unit with computing capabilities such as an Electronic Control Unit (ECU) of a vehicle or a motor controller. For the convenience of description, each embodiment of the present application will take the motor controller as the control main body of the motor system and each motor in the motor system to implement the energy recovery control method provided by the present application.

[0058] Please refer to Figure 1 , Figure 1 which is a flowchart of an energy recovery control method provided by an embodiment of the present application. The method includes S101 - S105:

[0059] S101: Obtain the state of charge and battery temperature of the vehicle's battery.

[0060] Among them, the state of charge (SOC) of the battery is a metric for measuring the remaining battery power, usually expressed as a percentage, that is, the ratio of the remaining battery capacity to the fully charged state capacity of the battery is used for quantitative expression. The state of charge of the battery can be obtained by the open circuit voltage method, that is, through the open circuit voltage characteristic (open circuit voltage - state of charge, OCV - SOC) curve of the battery, by measuring the real - time open circuit voltage across the battery, and comparing it with the OCV - SOC characteristic curve to determine the current state of charge of the battery.

[0061] In some possible implementation manners, the battery temperature can be obtained by a temperature sensor, and then the temperature obtained by the temperature sensor is converted into an electrical signal and sent to the motor controller through a communication bus such as a Controller Area Network (CAN) bus.

[0062] S102: Determine the charging power of the battery according to the state of charge and the battery temperature of the battery.

[0063] In some possible implementation manners, a MAP diagram corresponding to the battery can be preset in the motor controller. This MAP diagram is the corresponding relationship between the battery temperature, the state of charge of the battery, and the battery charging power. When the battery temperature and the state of charge of the battery are obtained, the battery charging power in the current state of the battery is determined by querying this MAP diagram.

[0064] S103: Determine the first operating condition of the vehicle according to the vehicle state information of the vehicle.

[0065] Among them, the vehicle state information may include state information such as the vehicle speed, the opening degree of the vehicle throttle pedal, the opening degree of the vehicle brake pedal, and the gear of the vehicle. For example, when the vehicle speed tends to decrease, the opening degree of the vehicle throttle pedal is 0, the opening degree of the vehicle brake pedal is 0, and the gear of the vehicle remains unchanged, it is determined that the first operating condition of the vehicle is the coasting condition; and when the vehicle speed drops significantly, and the opening degree of the vehicle brake pedal is large, and at the same time the vehicle gear drops as the vehicle speed drops, it is determined that the vehicle is in the decelerating braking condition.

[0066] S104: According to the first operating condition, calculate the energy recovery power of the vehicle's motor system under the first operating condition.

[0067] Since the motor rotor provides a reverse friction braking torque when driven by the running inertia of the vehicle, thereby realizing power generation. Therefore, it is possible to calculate the reverse friction braking torque of the motor system during braking when the vehicle is running in the braking or decelerating coasting condition at a certain fixed time and the energy recovery function is turned on, then calculate the reverse friction braking torque of the motor system during braking when running under the same time and the same condition and the energy recovery function is turned off, and finally calculate the difference between the two reverse friction braking torques, so as to calculate the energy value recovered by the motor system according to the difference, and then calculate the energy recovery power of the motor system in combination with the fixed time value.

[0068] S105: In response to determining that the energy recovery power is greater than the charging power, control the vehicle's motor system to operate in a second operating condition; the motor operating efficiency of the motor system operating in the second operating condition is lower than the motor operating efficiency of the motor system operating in the first operating condition.

[0069] The motor controller can judge the magnitude of the calculated energy recovery power and the charging power. When the energy recovery power is greater than the charging power, it is determined that the battery charging ability is limited at this time, that is, due to the limitation of the battery charging ability, the rotor power generation is also correspondingly limited, and the deceleration resistance that the rotor can provide decreases. At this time, the motor controller controls the motor system to change the operating condition so that the operating efficiency of the motor system decreases, that is, the motor system itself consumes the excess energy, thereby maintaining the decelerating braking ability of the motor system.

[0070] Next, a method for controlling energy recovery provided by an embodiment of the present application will be introduced in combination with a motor system with multi-motor series-parallel connection in a hybrid vehicle.

[0071] Please refer to Figure 2 , Figure 2Schematic diagram of the hardware application of an energy recovery control method provided by an embodiment of the present application. The hardware includes a main drive (Torgue Max, TM) motor and an integrated starter generator (ISG); one end of the main drive motor is connected to the battery, and the other end of the main drive motor is connected to the wheel end of the vehicle through a speed reducer; one end of the integrated starter generator is connected to the battery, and the other end of the integrated starter generator is connected to the engine and to the wheel end.

[0072] The clutchless multi-motor system can drive the vehicle through three driving modes, namely pure electric drive, series drive, and parallel drive. When in the pure electric drive mode, the engine is in an unoperated state, and only the battery provides power. The TM motor drives the wheel end to drive the vehicle; when in the series drive mode, the engine provides power, generates electricity through the ISG, and transmits the generated electricity to the TM motor. The TM motor drives the wheel end to drive the vehicle; when in the parallel drive mode, on the one hand, the engine drives the wheel end to drive the vehicle, and on the other hand, the ISG generates electricity, and then the TM motor drives the vehicle.

[0073] It should be noted that when the vehicle speed is lower than the engine idle speed, the engine cannot ensure the braking effect of the vehicle.

[0074] In some possible implementation manners, when the engine is in an unoperated state, that is, when the vehicle is in the pure electric drive state, based on the above embodiment, further, the motor system can be controlled in the following manner:

[0075] In response to determining that the energy recovery power is greater than the charging power and the engine is in an unoperated state, control the main drive motor and the integrated starter generator to change the operating conditions so that the motor system of the vehicle operates in a second operating condition.

[0076] Combined with Figure 2 , when controlling the TM motor and the ISG generator to change the operating conditions, the motor controller can make the TM motor and the ISG generator operate in the low-efficiency region, that is, reduce the power generation efficiency of the ISG generator and the driving efficiency of the TM motor, so that the surplus energy caused by the energy recovery power exceeding the charging power is consumed by the ISG generator and the TM motor itself, to reduce the power generation power of the ISG generator and the TM motor, that is, indirectly reduce the energy recovery power, and further improve the deceleration ability of the motor system.

[0077] To improve the operating safety of the engine, based on the above embodiment, further, the method further includes:

[0078] In response to determining that the regenerative power is greater than the charging power and the engine is in an off state, control the first output torque transmitted from the integrated starter generator to the engine to be less than a preset torque.

[0079] When the ISG motor provides reverse torque, part of the reverse torque will be output to the engine to drag the engine to start running. Since the engine is not started, that is, at this time the engine only runs through the ISG motor, the output torque of the ISG motor should be controlled below a certain specific torque at this time, so as to prevent the engine from being dragged away and improve the vehicle operation safety.

[0080] In some other possible implementation manners, when the engine is in an operating state, that is, when the vehicle is in a series or parallel drive state, based on the above embodiments, further, the motor system can be controlled in the following manner:

[0081] In response to determining that the regenerative power is greater than the charging power and the engine is in an operating state, control the integrated starter generator to output a second output torque opposite to that of the engine; the power consumption of the motor of the integrated starter generator is greater than the regenerative power.

[0082] Also in combination with Figure 2 , at this time the ISG generator receives the energy provided by the wheel end, so as to transmit a second output torque to the engine, and this output torque is opposite to the rotation direction of the engine, that is, at this time the ISG generator is in a power consumption mode, consuming the surplus energy, and at the same time, because it transmits a reverse output torque, it can also drag the engine to run, so as to achieve the effect of improving the deceleration performance.

[0083] At the same time, the TM motor is in a power generation mode due to the deceleration or braking condition of the vehicle, and its power generation principle has been introduced in detail above and will not be elaborated here.

[0084] At this time, the ISG generator has a power consumption function, and the TM motor has a power generation function. Then, in some possible implementation manners, the motor controller can control the power consumption of the motor of the ISG generator to be greater than or equal to the power generation power of the TM motor, so that the motor system shows a working state of consuming energy to ensure the deceleration performance of the vehicle.

[0085] There is also a class of possible working conditions, that is, the regenerative power of the motor exceeds the charging power of the battery by a certain value, and it is not enough to balance the two only by changing the operating conditions of the motor.

[0086] To further solve this technical problem, based on the above embodiments, further, in some possible implementation manners, the method further includes:

[0087] In response to determining that the difference between the energy recovery power and the charging power is greater than a first preset power, and the power-consuming components of the vehicle are in an operating state, increase the power consumption of the power-consuming components to a preset power consumption.

[0088] Among them, the power-consuming components can be components that consume power inside and outside the vehicle, and the number of power-consuming components can be one or more. The power-consuming components can be refrigeration or heating components. For example, the refrigeration component can be an air-conditioning compressor, and the heating component can be a positive temperature coefficient (PTC) heating resistor, that is, a PTC heater, etc.

[0089] Taking an air conditioner with both heating and cooling functions as an example, when the driver turns on the in-vehicle air conditioner, the part of the motor energy recovery power that exceeds the battery charging power can be consumed by increasing the power consumption of the air conditioner, so as to maintain the deceleration performance of the vehicle.

[0090] In some other possible implementation manners, based on the above embodiments, further, the method further includes:

[0091] In response to determining that the difference between the energy recovery power and the charging power is greater than a second preset power, and the difference between the battery temperature and the preset battery operating temperature is greater than a preset temperature threshold, control the battery temperature to change by heating or cooling, so that the difference between the battery temperature and the preset battery operating temperature is less than the preset temperature threshold.

[0092] Since the power conversion efficiency of the battery will decrease when it works in an overheated or overcooled environment, the charging power will decrease. Among them, the preset battery operating temperature can be the rated operating temperature of the battery. When the difference between the battery temperature and the preset battery operating temperature is greater than the preset temperature threshold, that is, when the actual operating temperature of the battery exceeds or is lower than the rated operating temperature of the battery by a large amount, the working temperature of the battery is changed by a heating or cooling device to increase the charging power of the battery, reduce the difference between the charging power and the energy recovery power, and indirectly improve the deceleration performance of the vehicle.

[0093] Among them, the heating or cooling device of the battery can be a Peltier device, or other devices that can change the battery temperature. In some possible implementation manners, the motor controller receives the real-time battery temperature provided by the temperature sensor and controls the heating and cooling devices according to the real-time battery temperature, so that the battery works within a suitable temperature range.

[0094] Please refer to Figure 3 , Figure 3 which is a structural block diagram of an energy recovery control device provided by an embodiment of the present application. The device includes:

[0095] A battery state acquisition unit 310, configured to acquire the state of charge and the battery temperature of the vehicle's battery;

[0096] A charging power calculation unit 320, configured to determine the charging power of the battery according to the state of charge and the battery temperature of the battery;

[0097] An operating condition determination unit 330, configured to determine a first operating condition of the vehicle according to the vehicle state information of the vehicle;

[0098] A regenerative power calculation unit 340, configured to calculate the energy regenerative power of the vehicle's motor system under the first operating condition according to the first operating condition;

[0099] An operating condition control unit 350, configured to, in response to determining that the regenerative power is greater than the charging power, control the vehicle's motor system to operate in a second operating condition; the motor operating efficiency of the motor system operating in the second operating condition is lower than the motor operating efficiency of the motor system operating in the first operating condition.

[0100] As a possible implementation, the motor system includes a main drive motor and an integrated starter generator; one end of the main drive motor is connected to the battery, and the other end of the main drive motor is connected to the vehicle's wheel end; one end of the integrated starter generator is connected to the battery, and the other end of the integrated starter generator is connected to the engine and is connected to the wheel end.

[0101] As a possible implementation, the operating condition control unit is further configured to:

[0102] In response to determining that the regenerative power is greater than the charging power and the engine is in an unoperated state, control the main drive motor and the integrated starter generator to change the operating condition, so that the vehicle's motor system operates in a second operating condition.

[0103] As a possible implementation, the device further includes:

[0104] A first torque control unit, configured to, in response to determining that the regenerative power is greater than the charging power and the engine is in an unoperated state, control the first output torque transmitted by the integrated starter generator to the engine to be less than a preset torque.

[0105] As a possible implementation, the device further includes:

[0106] A first torque control unit, configured to control the integrated starter generator to output a second output torque opposite to that of the engine in response to determining that the energy recovery power is greater than the charging power and the engine is in an operating state; the power consumption of the motor of the integrated starter generator is greater than the energy recovery power.

[0107] As a possible implementation, the device further includes:

[0108] A power-consuming component control unit, configured to increase the power consumption of the power-consuming component to a preset power consumption in response to determining that the difference between the energy recovery power and the charging power is greater than a first preset power and the power-consuming component of the vehicle is in an operating state.

[0109] As a possible implementation, the device further includes:

[0110] A battery temperature control unit, configured to control the change of the battery temperature by heating or cooling in response to determining that the difference between the energy recovery power and the charging power is greater than a second preset power and the difference between the battery temperature and the preset battery operating temperature is greater than a preset temperature threshold, so that the difference between the battery temperature and the preset battery operating temperature is less than the preset temperature threshold.

[0111] It can be seen from the above technical solutions that by obtaining the state of charge and the temperature of the battery of the vehicle; calculating the charging power of the battery according to the state of charge and the temperature of the battery; determining the first operating condition of the vehicle according to the vehicle state information of the vehicle; calculating the energy recovery power of the motor system of the vehicle under the first operating condition according to the first operating condition; controlling the motor system of the vehicle to operate in a second operating condition in response to determining that the energy recovery power is greater than the charging power; the motor operating efficiency of the motor system operating in the second operating condition is lower than the motor operating efficiency of the motor system operating in the first operating condition. That is, when the charging efficiency of the battery is not sufficient to receive the energy recovery efficiency of the motor system, the operating condition of the motor system is changed, so that the motor system operates at a lower motor operating efficiency, thereby increasing the power consumption of the motor system itself, reducing the energy recovery efficiency of the motor system, matching the charging efficiency of the battery with the energy recovery efficiency of the motor system, thereby maintaining the deceleration ability of the vehicle, improving the driving experience of the driver, and improving the driving safety of the vehicle.

[0112] Please refer to Figure 4 , Figure 4 which is a structural block diagram of a computer device for energy recovery control provided by an embodiment of the present application. The computer device includes a processor 410 and a memory 420:

[0113] The memory 420 is configured to store program code and transmit the program code to the processor 410;

[0114] The processor 410 is configured to execute the energy recovery control method according to any one of the above embodiments based on the instructions in the program code.

[0115] An embodiment of the present application also discloses a computer-readable storage medium for storing a computer program, which is configured to execute the energy recovery control method according to any one of the above embodiments when executed by a processor.

[0116] It can be understood that this method can be applied to a processing device, which is a processing device capable of performing motion control, such as a terminal device or a server with motion control functions. This method can be independently executed by a terminal device or a server, or can be applied to a network scenario where a terminal device and a server communicate, and is executed in cooperation with the terminal device and the server. Among them, the terminal device can be a device such as a computer or a mobile phone. The server can be understood as an application server or a Web server. In actual deployment, the server can be an independent server or a cluster server.

[0117] Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a computer-readable storage medium, and when executed, it executes the steps including the above method embodiments; and the foregoing storage medium can be at least one of the following media: read-only memory (ROM), RAM, magnetic disk, or optical disk, etc., which can store program codes.

[0118] It should be noted that the embodiments in this specification are all described in a progressive manner. For the same or similar parts between the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the device and system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiments. The device and system embodiments described above are only illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0119] As described above, it is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An energy recovery control method, characterized in that: The method comprises: Obtaining the battery state of charge and battery temperature of the vehicle's battery; Determining a charging power of the battery according to the battery state of charge and the battery temperature; Determining a first operating condition of the vehicle according to vehicle state information of the vehicle; Calculating, according to the first operating condition, energy recovery power of the motor system of the vehicle under the first operating condition; In response to determining that the energy recovery power is greater than the charging power, the motor system of the vehicle is controlled to operate in a second operating condition; the motor working efficiency of the motor system operating in the second operating condition is lower than the motor working efficiency of the motor system operating in the first operating condition.

2. The method according to claim 1, characterized in that The motor system includes a main drive motor and an integrated starter generator; one end of the main drive motor is connected to the battery, and the other end of the main drive motor is connected to the wheel end of the vehicle; one end of the integrated starter generator is connected to the battery, and the other end of the integrated starter generator is connected to the engine and the wheel end.

3. The method according to claim 1, characterized in that In response to determining that the energy recovery power is greater than the charging power, controlling the motor system of the vehicle to operate in a second operating condition includes: In response to determining that the energy recovery power is greater than the charging power and the engine is in a non-operating state, the main drive motor and the integrated starter generator are controlled to change operating conditions so that the vehicle's motor system operates in a second operating condition.

4. The method according to claim 3, characterized in that The method further comprises: In response to determining that the energy recovery power is greater than the charging power and the engine is in a non-operating state, the first output torque transmitted by the integrated starter generator to the engine is controlled to be less than a preset torque.

5. The method according to claim 2, characterized in that: The method further comprises: In response to determining that the energy recovery power is greater than the charging power and the engine is in a running state, the integrated starter generator is controlled to output a second output torque opposite to the engine; the motor power consumption of the integrated starter generator is greater than the energy recovery power.

6. The method according to claim 1, characterized in that The method further comprises: In response to determining that the difference between the energy recovery power and the charging power is greater than a first preset power and a power-consuming element of the vehicle is in an operating state, the power consumption of the power-consuming element is increased to a preset power consumption.

7. The method according to claim 2, characterized in that: The method further comprises: In response to determining that the difference between the energy recovery power and the charging power is greater than a second preset power, and the difference between the battery temperature and the preset battery operating temperature is greater than a preset temperature threshold, the battery temperature is controlled to change by heating or cooling so that the difference between the battery temperature and the preset battery operating temperature is less than the preset temperature threshold.

8. A coasting energy recovery control device, characterized in that: The device comprises: A battery status acquisition unit, used to acquire the battery state of charge and battery temperature of the battery of the vehicle; a charging power calculation unit, configured to determine the charging power of the battery according to the battery state of charge and the battery temperature; an operating condition determining unit, configured to determine a first operating condition of the vehicle according to vehicle state information of the vehicle; a recovery power calculation unit, configured to calculate, according to the first operating condition, the energy recovery power of the motor system of the vehicle under the first operating condition; An operating condition control unit is used to control the motor system of the vehicle to operate in a second operating condition in response to determining that the energy recovery power is greater than the charging power; the motor working efficiency of the motor system operating in the second operating condition is lower than the motor working efficiency of the motor system operating in the first operating condition.

9. A computer device, characterized in that: The computer device comprises a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the energy recovery control method described in any one of claims 1-7 according to the instructions in the program code.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program, and the computer program, when executed by a processor, is used to execute the energy recovery control method according to any one of claims 1 to 7.

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