Wind power generation system based on automobile radiator fan and control method

Abstract

The invention provides a wind power generation system based on an automobile radiator fan and a control method, and the method comprises the steps: obtaining vehicle working condition parameters in real time, and dynamically selecting a strong heat dissipation mode, an energy recovery mode or a balance mode based on the obtained vehicle working condition parameters; the optimal rotating speed of the fan is calculated through an optimization algorithm, and cooperative control over the heat dissipation requirement and the generated power is achieved in combination with a control valve assembly; and the storage and distribution of the recovered electric energy are managed in a hierarchical manner according to the storage battery SOC. Wind energy generated in the running process of the automobile is recycled, converted into electric energy and stored in the storage battery, so that the energy consumption of the electric automobile is reduced, and the driving range of the electric automobile is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of energy consumption reduction in automobiles, and particularly to a wind power generation system and control method based on an automobile radiator fan. Background Art

[0002] With the increasingly severe global energy problems and the enhancement of environmental awareness, electric vehicles, as a clean energy transportation means, have received extensive attention and promotion. However, the cruising range and energy consumption problems of electric vehicles have always been the key factors restricting their development. In order to reduce energy consumption and improve energy utilization efficiency, the entire vehicle industry has been continuously exploring new energy recovery and utilization methods.

[0003] In the existing automobile structure, a radiator and a radiator fan are usually installed behind the front air inlet of the vehicle; when the vehicle temperature is too high and cooling is required, the radiator fan will start and take away the heat by rotating quickly to achieve the cooling effect. However, during vehicle driving, especially in high-speed driving scenarios such as highways, even when the vehicle does not need cooling, the radiator fan will still rotate due to the influence of wind, generating a certain amount of kinetic energy. If this part of kinetic energy can be effectively utilized, it will be of great significance for reducing automobile energy consumption and improving energy utilization efficiency. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a wind power generation system and control method based on an automobile radiator fan. By making full use of the radiator fan in the idle state, the wind energy generated during vehicle driving is converted into electric energy and stored in the storage battery, so as to reduce the charging demand of the storage battery, reduce the energy consumption of the entire vehicle, and effectively improve the cruising range of the vehicle.

[0005] In order to achieve the above object, the following technical solutions are adopted:

[0006] On the one hand of the embodiment of the present invention, a wind power generation system based on an automobile radiator fan is provided. The system includes an automobile radiator fan, a fan drive, a generator rotor, a power adapter, a storage battery, and a control valve assembly, wherein:

[0007] The automobile radiator fan is installed in the front engine compartment of the vehicle for forced heat dissipation;

[0008] The fan drive is integrated in one of the control main board or the external control board of the automobile system and is connected to the radiator fan through a cable for controlling the rotation speed, rotation direction, start and stop of the radiator fan;

[0009] The generator rotor is installed on the radiator fan and rotates coaxially with the radiator fan to generate alternating current;

[0010] The power adapter includes a rectifier and a DC-DC conversion module. The power adapter is connected to the generator rotor and the battery respectively, and is used to convert the alternating current generated by the generator rotor into direct current and store it in the battery;

[0011] The battery is used to store the recovered electric energy and supply power to the low-voltage electrical appliances of the vehicle;

[0012] The control valve assembly is used to control the connection state between the radiator fan, the fan drive, and the power adapter. By switching the control valve, the heat dissipation function and the power generation function of the radiator fan can be switched.

[0013] Further, in the power adapter, the rectifier is used to convert alternating current (AC) into direct current (DC), and at the same time cooperate with the filter circuit to output smooth direct current, providing a stable power supply basis for subsequent devices; the DC-DC conversion module is used to flexibly adjust the voltage, realize step-up, step-down or step-up-and-step-down conversion of the DC voltage, suppress input voltage fluctuations and load changes, and output a stable DC voltage to ensure the reliable operation of precision instruments, automotive electronics and other devices.

[0014] Further, the control valve assembly includes two control valves, namely: Control valve 1 (electromagnetic clutch) arranged between the generator rotor and the power adapter, which controls the on-off of the power generation circuit; Control valve 2 (relay) arranged between the radiator fan and the fan drive, which controls the start and stop of the heat dissipation function.

[0015] Further, a current limiting device connected in series is also arranged between the power adapter and the battery, which is used to limit the magnitude of the current to prevent damage to the battery and other components due to excessive current; the power adapter has overvoltage protection and overcurrent protection functions to ensure the safe and stable operation of the system.

[0016] On the other hand, an embodiment of the present invention also provides a control method for a wind power generation system based on an automotive radiator fan, and the method includes:

[0017] Real-time obtain vehicle condition parameters, and dynamically select a strong heat dissipation mode, an energy recovery mode or an equalization mode based on the obtained vehicle condition parameters;

[0018] Calculate the optimal fan speed through an optimization algorithm, and combine the control valve assembly to achieve coordinated control of the heat dissipation demand and the power generation power;

[0019] Manage the storage and distribution of the recovered electric energy according to the battery SOC classification.

[0020] Further, the real-time obtaining of the vehicle condition parameters is specifically to collect the vehicle speed v, the engine temperature T, and the state of charge SOC of the battery of the vehicle in real time through the vehicle built-in sensors;

[0021] Based on the obtained vehicle operating conditions parameters, dynamically select the strong heat dissipation mode, energy recovery mode or balancing mode, specifically including:

[0022] When the engine temperature T≥90°C, select the strong heat dissipation mode, that is, the control valve 2 closes and the control valve 1 disconnects. At this time, the on-vehicle battery discharges to provide power for the fan drive, and the radiator fan rotates to quickly cool down the vehicle;

[0023] When the engine temperature T<80°C and v≥40km / h, select the energy recovery mode, that is, the control valve 1 closes and the control valve 2 disconnects. At this time, the radiator fan is connected to the power adapter, and the wind outside the vehicle enters through the front air inlet of the vehicle. The wind power drives the radiator fan to rotate, driving the generator rotor to rotate. The generator rotor converts mechanical energy into electrical energy. The generated alternating current is converted into direct current through the power adapter and stored in the battery after current protection through the current limiting device;

[0024] When the engine temperature and vehicle speed are in other conditions, select the balancing mode, that is, dynamically adjust the radiator fan speed through the PID algorithm to balance the heat dissipation demand and power generation benefit.

[0025] Further, the dynamically adjusting the radiator fan speed through the PID algorithm is specifically to output a dynamic control signal through the PID algorithm, convert it into a wind speed through the drive circuit, and combine the motor characteristics and control hardware design during the conversion to achieve closed-loop regulation of the speed; specifically including:

[0026] Based on the temperature and power generation power collected by each sensor, obtain the temperature error and power generation benefit error, and calculate the dual-objective comprehensive error;

[0027] Based on the dual-objective comprehensive error, build a PID control equation to output a dynamic control signal;

[0028] Adjust the motor drive voltage through the output dynamic control signal, thereby changing the radiator fan speed.

[0029] Further, calculating the optimal fan speed through the optimization algorithm and combining the control valve assembly to achieve coordinated control of the heat dissipation demand and power generation power is specifically carried out when the vehicle executes the energy recovery mode, and specifically further includes:

[0030] Establish a mathematical model between the fan speed and the power generation power P, and its mathematical model expression is:

[0031] P=k··A·v 3 ·η gen ·η conv

[0032] Where ρ represents the air density, A represents the fan swept area, v is the equivalent wind speed (related to the vehicle speed and fan speed), η gen represents the generator efficiency, η conv represents the converter efficiency, and k is the motor characteristic constant (which can compensate for other factors or errors not considered in the model);

[0033] The optimal speed is solved by the genetic algorithm to maximize the power generation benefit.

[0034] Furthermore, the solution of the optimal speed by the genetic algorithm is specifically as follows:

[0035] The fan speed is encoded as a chromosome using binary coding;

[0036] A certain number of individuals (i.e., chromosomes) are randomly generated, and these individuals represent different fan speed schemes to form an initial population;

[0037] The fitness function is defined as the power generation benefit function J = P - α·(e T (t)), where P is the power generation power, α is the heat dissipation weight coefficient, and e T (t) is the temperature error. The larger the value of the fitness function J, the better the fan speed scheme of the individual;

[0038] According to the fitness function value, the tournament selection method is used to select better individuals for reproduction to ensure that individuals with higher fitness have more chances to be selected;

[0039] The selected individuals are subjected to crossover and mutation operations to generate new individuals;

[0040] The newly generated individuals replace the individuals with lower fitness in the population to form a new generation of population; in this way, each generation of population will be better than the previous generation;

[0041] Check whether the termination condition is satisfied. If the maximum number of iterations is reached or the population fitness no longer improves significantly, the optimal individual, that is, the optimal speed, is output. Otherwise, return to step D to continue the iteration until the optimal individual is output.

[0042] Furthermore, among the priority conditions for the vehicle to dynamically select the strong heat dissipation mode, the energy recovery mode or the balance mode, the priority of the battery SOC state of charge is higher than the vehicle operating condition parameters. The hierarchical management of the storage and distribution of the recovered electric energy according to the battery SOC specifically includes:

[0043] When the battery SOC < 30%, slight sacrifice of the heat dissipation performance is allowed for forced charging;

[0044] When 30% ≤ battery SOC ≤ 80%, the energy is recovered normally;

[0045] When the State of Charge (SOC) of the battery is > 80%, the electric energy is directly supplied to the low-voltage load.

[0046] Furthermore, when it is detected that the bus voltage fluctuation exceeds ±15%, the power generation circuit is immediately cut off.

[0047] Compared with the prior art, the present invention has the following advantages:

[0048] 1. Reduce energy consumption. By recycling the wind energy generated during the driving of the vehicle, converting it into electric energy and storing it in the battery, the charging demand of the battery is reduced, and the overall vehicle energy consumption is decreased.

[0049] 2. Improve the energy utilization rate. Make full use of the radiator fan in the idle state, convert mechanical energy into electric energy, and improve the energy utilization rate. At the same time, by reducing energy consumption and improving the energy utilization rate, the cruising range of the electric vehicle is effectively extended, alleviating the mileage anxiety problem of electric vehicles.

[0050] 3. The present invention uses clean energy for power generation, reducing the dependence on traditional energy and emissions, which is beneficial to environmental protection and energy conservation.

[0051] Other features and advantages of the present invention will be described in the subsequent specification, and part of them will become obvious from the specification or be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the specification, claims, and drawings. Brief Description of the Drawings

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present invention 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 following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0053] Figure 1 It is a schematic structural diagram of a wind power generation system based on an automotive radiator fan.

[0054] Figure 2 It is a schematic flowchart of the control method of a wind power generation system based on an automotive radiator fan. Detailed Embodiments

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0056] In one embodiment, please refer to Figure 1 , a wind power generation system based on an automotive radiator fan is provided. The system includes an automotive radiator fan, a fan drive, a generator rotor, a power adapter, a storage battery, and a control valve assembly, where:

[0057] The automotive radiator fan is installed in the front engine compartment of the vehicle for forced heat dissipation;

[0058] The fan drive is integrated in one of the control main board of the automotive system or an external control board and is connected to the radiator fan through a cable for controlling the rotation speed, rotation direction, start, and stop of the radiator fan;

[0059] The generator rotor is installed on the radiator fan and rotates coaxially with the radiator fan to generate alternating current;

[0060] The power adapter includes a rectifier and a DC-DC conversion module. The power adapter is respectively connected to the generator rotor and the storage battery for converting the alternating current generated by the generator rotor into direct current and storing it in the storage battery;

[0061] The storage battery is used for storing the recycled electric energy and supplying power to the low-voltage electrical appliances of the vehicle;

[0062] The control valve assembly is used for controlling the connection state between the radiator fan, the fan drive, and the power adapter. By switching the control valve, the heat dissipation function and the power generation function of the radiator fan are switched.

[0063] In this embodiment, in the power adapter, the rectifier is used for converting alternating current (AC) into direct current (DC), and at the same time, cooperating with the filter circuit to output smooth direct current to provide a stable power supply basis for subsequent devices; the DC-DC conversion module is used for flexibly adjusting the voltage to achieve step-up, step-down, or step-up-and-step-down conversion of the DC voltage, suppressing input voltage fluctuations and load changes, and outputting a stable DC voltage to ensure the reliable operation of devices such as precision instruments and automotive electronics.

[0064] In this embodiment, the control valve assembly includes two control valves, namely: Control Valve 1 (electromagnetic clutch) disposed between the generator rotor and the power adapter to control the on / off of the power generation circuit; Control Valve 2 (relay) disposed between the radiator fan and the fan drive to control the start / stop of the heat dissipation function.

[0065] In this embodiment, a current limiting device is also connected in series between the power adapter and the battery to limit the magnitude of the current and prevent damage to the battery and other components due to excessive current; the power adapter has overvoltage protection and overcurrent protection functions to ensure the safe and stable operation of the system.

[0066] In one embodiment, refer to Figure 2 , a control method for a wind power generation system based on an automotive radiator fan is also provided, and the method includes:

[0067] Step S1: Real-time obtain vehicle condition parameters, and dynamically select a strong heat dissipation mode, an energy recovery mode, or a balancing mode based on the obtained vehicle condition parameters;

[0068] Further, in step S1, the real-time obtaining of vehicle condition parameters is specifically to collect the vehicle speed v, the engine temperature T, and the state of charge SOC of the battery in real time through built-in vehicle sensors;

[0069] The dynamically selecting a strong heat dissipation mode, an energy recovery mode, or a balancing mode based on the obtained vehicle condition parameters specifically includes:

[0070] Step S101: When the engine temperature T≥90°C, select the strong heat dissipation mode, that is, Control Valve 2 is closed and Control Valve 1 is opened. At this time, the in-vehicle battery discharges to provide power for the fan drive, and the radiator fan rotates to quickly cool the vehicle;

[0071] Step S102: When the engine temperature T<80°C and v≥40 km / h, select the energy recovery mode, that is, Control Valve 1 is closed and Control Valve 2 is opened. At this time, the radiator fan is connected to the power adapter, the wind outside the vehicle enters through the front air inlet of the vehicle, the wind power drives the radiator fan to rotate, drives the generator rotor to rotate, the generator rotor converts mechanical energy into electrical energy, the generated alternating current is converted into direct current through the power adapter, and after current protection through the current limiting device, it is stored in the battery;

[0072] Step S103: When the engine temperature and vehicle speed are in other conditions, select the balancing mode, that is, dynamically adjust the radiator fan speed through the PID algorithm to balance the heat dissipation requirement and the power generation benefit.

[0073] Further, in step S103, the dynamic adjustment of the radiator fan speed by the PID algorithm specifically outputs a dynamic control signal through the PID algorithm, converts it into a wind speed through a drive circuit, and combines the motor characteristics and control hardware design during the conversion process to achieve closed-loop regulation of the speed; specifically including:

[0074] Step S1031: Based on the temperature and power generation collected by each sensor, obtain the temperature error and power generation revenue error, and calculate the dual-objective comprehensive error;

[0075] Further, the temperature error e T (t), the power generation revenue error e P (t), and the expression of the dual-objective comprehensive error e(t) are as follows:

[0076]

[0077] In the formula, e T (t) represents the temperature error, T 实 represents the actual temperature, T 目 represents the target temperature; e P (t) represents the power generation revenue error, P 目 represents the target power generation power, P 实 represents the actual power generation power; e(t) represents the dual-objective comprehensive error, where α ∈ [0, 1] is the heat dissipation weight coefficient.

[0078] Step S1032: Based on the dual-objective comprehensive error, build a PID control equation to output a dynamic control signal;

[0079] Further, the expression of the PID control equation is:

[0080]

[0081] In the formula, K p , K i , K d are the proportional, integral, and differential coefficients respectively, u(t) represents the dynamic control signal, de(t) represents the rate of change of the error with time, that is, the instantaneous change of the error, dt represents the time differential, that is, the change of the error within a small time interval, and t represents the time during which the control process proceeds.

[0082] Step S1033: Adjust the motor drive voltage through the output dynamic control signal, thereby changing the radiator fan speed.

[0083] Further, the adjustment of the motor drive voltage through the output dynamic control signal to change the radiator fan speed, and the conversion relationship expression between the motor speed and the dynamic signal is:

[0084] n(t) = k·u(t) + n0

[0085] Wherein, n(t) represents the rotational speed of the motor currently under control, k is the motor characteristic constant, and n0 is the initial rotational speed of the motor, that is, the free rotational speed when there is no control signal.

[0086] In one embodiment, when the temperature approaches the threshold of 90 °C, the heat dissipation weight coefficient α increases. At this time, the temperature error e T (t) is preferentially reduced, and the rotational speed of the cooling fan is increased; when the vehicle is running at high speed with low load, the heat dissipation weight coefficient α decreases, and the power generation is preferentially increased to maintain the rotational speed of the fan in the high-efficiency power generation range.

[0087] Step S2: Calculate the optimal rotational speed of the fan through an optimization algorithm, and combine with the control valve assembly to achieve the coordinated control of heat dissipation requirements and power generation;

[0088] Further, in step S2, the calculation of the optimal rotational speed of the fan through the optimization algorithm and the combination with the control valve assembly to achieve the coordinated control of heat dissipation requirements and power generation are specifically carried out when the vehicle executes the energy recovery mode, and specifically further include:

[0089] Step S201: Establish a mathematical model between the rotational speed of the fan and the power generation P, and its mathematical model expression is:

[0090] P = k·ρ·A·v 3 ·η gen ·η conv

[0091] Wherein, ρ represents the air density, A represents the fan swept area, v is the equivalent wind speed (related to the vehicle speed and the fan rotational speed), and η gen represents the generator efficiency, and η conv represents the converter efficiency, and k is the motor characteristic constant (which can compensate for other factors or errors not considered in the model);

[0092] Step S202: Solve the optimal rotational speed through the genetic algorithm to maximize the power generation benefit.

[0093] Further, the solution of the optimal rotational speed through the genetic algorithm is specifically as follows:

[0094] Step A: Encode the rotational speed of the fan into a chromosome using binary coding;

[0095] Step B: Randomly generate a certain number of individuals (i.e., chromosomes), and these individuals represent different fan rotational speed schemes to form an initial population;

[0096] Step C: Define the fitness function as the power generation benefit function J = P - α·(e T(t)), where P is the power generation, α is the heat dissipation weight coefficient, and e T (t) is the temperature error. The larger the value of the fitness function J, the better the fan speed scheme of the individual;

[0097] Step D: According to the fitness function value, the tournament selection method is used to select better individuals for reproduction to ensure that individuals with higher fitness have more opportunities to be selected;

[0098] Step E: Perform crossover and mutation operations on the selected individuals to generate new individuals;

[0099] Furthermore, the crossover operation generates new individuals by exchanging some genes (i.e., certain bits on the chromosome), and the mutation operation generates new individuals by randomly changing some genes; these operations can increase the diversity of the population and the search space.

[0100] Step F: Replace the individuals with lower fitness in the population with the newly generated individuals to form a new generation of population; in this way, each generation of population will be better than the previous generation.

[0101] Step G: Check whether the termination condition is met. If the maximum number of iterations is reached or the population fitness no longer improves significantly, output the optimal individual, that is, the optimal speed. Otherwise, return to Step D to continue the iteration until the optimal individual is output.

[0102] Step S3: Manage the storage and distribution of the recovered electric energy according to the battery SOC classification.

[0103] Furthermore, among the priority conditions for the vehicle to dynamically select the strong heat dissipation mode, the energy recovery mode or the balancing mode, the battery SOC charge is higher in priority than the vehicle condition parameters. In Step S3, the management of the storage and distribution of the recovered electric energy according to the battery SOC classification specifically includes:

[0104] When the battery SOC < 30%, slightly sacrificing the heat dissipation performance is allowed and forced charging is performed;

[0105] When 30% ≤ battery SOC ≤ 80%, energy is normally recovered;

[0106] When the battery SOC > 80%, the electric energy is directly supplied to the low-voltage load.

[0107] Furthermore, when it is detected that the bus voltage fluctuation exceeds ±15%, the power generation circuit is immediately cut off.

[0108] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wind power generation system based on an automotive radiator fan, characterized in that, The system includes an automotive radiator fan, a fan drive, a generator rotor, a power adapter, a battery, and a control valve assembly, where: The automotive radiator fan is installed in the front engine compartment of the vehicle and is used for forced heat dissipation; The fan drive is integrated in one of the control main board or the external control board of the automotive system and is connected to the radiator fan through a cable, and is used to control the rotation speed, rotation direction, start and stop of the radiator fan; The generator rotor is installed on the radiator fan and rotates coaxially with the radiator fan to generate alternating current; The power adapter includes a rectifier and a DC-DC conversion module. The power adapter is respectively connected to the generator rotor and the battery, and is used to convert the alternating current generated by the generator rotor into direct current and store it in the battery; The battery is used to store the recycled electric energy and supply power to the low-voltage electrical appliances of the vehicle; The control valve assembly is used to control the connection state between the radiator fan, the fan drive, and the power adapter. By switching the control valve, the heat dissipation function and the power generation function of the radiator fan are switched.

2. The wind power generation system based on the fan of an automobile radiator according to claim 1, characterized in that, The control valve assembly includes two control valves, namely: Control valve 1, that is, an electromagnetic clutch, is arranged between the generator rotor and the power adapter and is used to control the on-off of the power generation circuit; Control valve 2, that is, a relay, is arranged between the radiator fan and the fan drive and is used to control the start and stop of the heat dissipation function.

3. The wind power generation system based on an automotive radiator fan according to claim 1, wherein: A current limiting device connected in series is further arranged between the power adapter and the battery, and is used to limit the magnitude of the current to prevent damage to the battery and other components due to excessive current; The power adapter has overvoltage protection and overcurrent protection functions to ensure the safe and stable operation of the system.

4. A control method for a wind power generation system based on an automotive radiator fan, which is used to implement the wind power generation system based on an automotive radiator fan according to any one of claims 1 to 3, wherein: Vehicle condition parameters are obtained in real time, and based on the obtained vehicle condition parameters, a strong heat dissipation mode, an energy recovery mode, or an equalization mode is dynamically selected; The optimal rotation speed of the fan is calculated through an optimization algorithm, and the control valve assembly is combined to achieve coordinated control of the heat dissipation requirement and the power generation power; The storage and distribution of the recycled electric energy are managed according to the battery SOC grading.

5. The control method for the wind power generation system based on an automotive radiator fan according to claim 4, wherein: The obtaining of the vehicle condition parameters in real time is specifically to collect the vehicle speed v, the engine temperature T, and the state of charge SOC of the battery of the vehicle in real time through the built-in sensors of the vehicle; The dynamically selecting a strong heat dissipation mode, an energy recovery mode, or an equalization mode based on the obtained vehicle condition parameters specifically includes: When the engine temperature T≥90°C, the strong heat dissipation mode is selected, that is, control valve 2 is closed and control valve 1 is opened. At this time, the on-vehicle battery discharges to provide power for the fan drive, and the radiator fan rotates to quickly cool down the vehicle; When the engine temperature T < 80°C and v ≥ 40 km / h, select the energy recovery mode, that is, the control valve 1 is closed and the control valve 2 is opened. At this time, the radiator fan is connected to the power adapter. The wind outside the vehicle enters through the front air inlet of the vehicle, and the wind drives the radiator fan to rotate, driving the generator rotor to rotate. The generator rotor converts mechanical energy into electrical energy. The generated alternating current is converted into direct current through the power adapter and stored in the battery after current protection through the current limiting device; When the engine temperature and vehicle speed are in other conditions, select the balanced mode, that is, dynamically adjust the radiator fan speed through the PID algorithm to balance the heat dissipation demand and power generation benefit.

6. The control method of the wind power generation system based on the automotive radiator fan according to claim 5, characterized in that: The dynamically adjusting the radiator fan speed through the PID algorithm is specifically to output a dynamic control signal through the PID algorithm, convert it into a wind speed through the drive circuit, and realize the closed-loop regulation of the speed in combination with the motor characteristics and control hardware design; specifically including: Based on the temperature and power generation power collected by each sensor, obtain the temperature error and power generation benefit error, and calculate the dual-object comprehensive error; Based on the dual-object comprehensive error, build a PID control equation to output a dynamic control signal; Adjust the motor drive voltage through the output dynamic control signal, thereby changing the radiator fan speed.

7. The control method of the wind power generation system based on the automotive radiator fan according to claim 4, characterized in that: The optimal fan speed is calculated through the optimization algorithm, and the heat dissipation demand and power generation power are coordinated and controlled in combination with the control valve assembly. Specifically, it is carried out when the vehicle executes the energy recovery mode, specifically: Establish a mathematical model between the fan speed and the power generation power P; Solve the optimal speed through the genetic algorithm to maximize the power generation benefit.

8. The control method of the wind power generation system based on the automobile radiator fan according to claim 7, characterized in that, The expression of the mathematical model is: P = k·ρ·A·v 3 ·η gen ·η conv Where ρ represents the air density, A represents the fan swept area, v is the equivalent wind speed, η gen represents the generator efficiency, η conv represents the converter efficiency, and k is the motor characteristic constant used to compensate for other factors or errors not considered in the model.

9. The control method of the wind power generation system based on the automobile radiator fan according to claim 8, characterized in that, The solving the optimal speed through the genetic algorithm is specifically: Encode the fan speed into a chromosome using binary encoding; Randomly generate a certain number of individuals (i.e., chromosomes), and these individuals represent different fan speed schemes to form an initial population; Define the fitness function as the power generation revenue function \(J = P-\alpha\cdot(e T (t))\), where \(P\) is the power generation power, \(\alpha\) is the heat dissipation weight coefficient, and \(e T (t)\) is the temperature error. The larger the value of the fitness function \(J\), the better the fan speed scheme of the individual; According to the fitness function value, use the tournament selection method to select better individuals for reproduction to ensure that individuals with higher fitness have more opportunities to be selected; Perform crossover and mutation operations on the selected individuals to generate new individuals; Replace the individuals with lower fitness in the population with the newly generated individuals to form a new generation of population; in this way, each generation of population will be better than the previous generation; Check whether the termination condition is met. If the maximum number of iterations is reached or the population fitness no longer increases significantly, output the optimal individual, that is, the optimal speed. Otherwise, return and continue to iterate until the optimal individual is output.

10. The control method of the wind power generation system based on the automobile radiator fan according to any one of claims 4 to 9, characterized in that, The hierarchical management of the storage and distribution of the recovered electric energy according to the battery SOC is specifically: When the battery SOC < 30%, allow slight sacrifice of heat dissipation performance and force charging; When 30% ≤ battery SOC ≤ 80%, recover energy normally; When the battery SOC > 80%, the electric energy is directly supplied to the low-voltage load.

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