A vehicle endurance auxiliary control system based on driving airflow energy recovery

Abstract

The application belongs to the technical field of new energy automobile energy recovery control, and discloses a vehicle endurance auxiliary control system based on driving airflow energy recovery, which comprises a driving airflow guiding and stabilizing module, a drum type fan blade energy capturing module, a series connection axial flux power generation module, a vehicle working condition signal acquisition module, an intelligent energy recovery control module, a rectification voltage stabilization and battery energy supplement module, and a safety protection and endurance evaluation module. Through the linkage of driving airflow guiding and stabilizing, drum type fan blade energy capturing, series connection axial flux power generation, vehicle working condition acquisition, intelligent recovery control, rectification voltage stabilization energy supplement, and safety endurance evaluation, airflow energy recovery in the whole driving process, stable power generation output, battery safety energy supplement, and endurance gain judgment are realized, and the problems of wind resistance energy waste, weak power generation at low speed, unmatched energy supplement, and difficult judgment of wind resistance benefits are solved.

Description

Technical Field

[0001] This invention belongs to the field of energy recovery control technology for new energy vehicles, and particularly relates to a vehicle range assist control system based on the recovery of driving airflow energy. Background Technology

[0002] New energy vehicles are affected by oncoming airflow and wind resistance during actual driving. To overcome wind resistance, the vehicles continuously consume power battery energy. However, the energy recovery of existing vehicles is mainly concentrated in the braking and deceleration scenario. The kinetic energy of the airflow that exists continuously throughout the driving process is not effectively utilized. Especially in high-speed cruising, urban expressway commuting, and long-term driving scenarios of new energy logistics vehicles, the energy of the oncoming airflow has continuity and recoverable value. Therefore, a vehicle range assistance control system that can guide and stabilize the airflow, capture the wind blades, generate electricity in series, identify the operating conditions, control energy replenishment, and conduct safety assessments is needed.

[0003] (1) Existing vehicle-mounted wind energy recovery devices mostly adopt exposed wind blades or a single generator structure. The air intake is easily affected by vehicle speed, installation position, turbulence disturbance and noise limitation, resulting in difficulty to start at low speed, large speed fluctuation at high speed, and unstable power generation voltage. In addition, some devices only pursue power generation output and do not comprehensively judge the power loss caused by additional wind resistance. It is easy for the power generation benefit to be lower than the wind resistance loss, making it difficult to truly improve the vehicle's range performance.

[0004] (2) The existing auxiliary power generation and energy replenishment control method is not linked enough with the vehicle operating conditions, battery SOC, battery allowable charging current, generator speed, output voltage, output current and temperature protection. It cannot dynamically adjust the current conduction opening, power generation load and energy replenishment current according to different states such as low-speed standby, city driving, high-speed cruising, full charge protection and abnormal protection. It is easy to have problems such as power fluctuation, battery energy replenishment mismatch, continued power generation in full charge state, and lagging overvoltage, overcurrent and overtemperature protection. Summary of the Invention

[0005] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a vehicle range assist control system based on driving airflow energy recovery. This system achieves full-process airflow energy recovery, stable power generation, safe battery replenishment, and range gain assessment through a combination of driving airflow guidance and stabilization, roller-type fan energy capture, series axial flux power generation, vehicle operating condition data acquisition, intelligent recovery control, rectification and voltage stabilization for energy replenishment, and safe range assessment. This solves the problems of wind resistance energy waste, weak low-speed power generation, mismatched energy replenishment, and difficulty in assessing wind resistance benefits.

[0006] The technical solution adopted in this invention is as follows: a vehicle range assist control system based on driving airflow energy recovery, including a driving airflow guiding and stabilizing module, a drum-type fan blade energy capture module, a series axial flux power generation module, a vehicle operating condition signal acquisition module, an intelligent energy recovery control module, a rectification and voltage regulation and battery replenishment module, and a safety protection and range assessment module. As a preferred technical solution of this scheme, the driving airflow guiding and stabilizing module receives the oncoming airflow generated during vehicle driving and generates the guiding opening adjustment result based on vehicle speed, air inlet angle, airflow fluctuation state and noise state; The drum-type fan blade energy capture module receives stable airflow and generates mechanical rotational energy based on airflow velocity, drum fan blade rotation speed, fan blade load status, and start-up threshold. The series-connected axial flux power generation module receives mechanical rotational energy and generates AC power output through multiple sets of axial flux power generation units connected in series. The vehicle operating condition signal acquisition module collects vehicle speed, battery SOC, generator speed, output voltage, output current, battery charging allowable current, vehicle energy consumption, and ambient temperature. The intelligent energy recovery control module generates energy recovery intensity, generator load adjustment results, guide flow opening adjustment results, and energy replenishment control commands based on vehicle operating condition signals, airflow energy status, power generation status, battery SOC, and safety protection status. The rectification, voltage regulation and battery charging module receives AC power and performs rectification, voltage regulation, current limiting, energy storage buffering and battery charging control to generate DC charging power that meets the charging conditions of the vehicle's power battery. The safety protection and range assessment module generates protection control results based on overvoltage, overcurrent, overtemperature, overspeed, vibration, full battery charge, circuit abnormality, and wind resistance gain status, and generates range auxiliary assessment results based on cumulative charging power, vehicle average energy consumption, and system operating time.

[0007] As a preferred technical solution of this scheme, the airflow guiding and stabilizing module includes an inlet air velocity identification unit, a guiding opening adjustment unit, an airflow stabilization judgment unit, an impurity filtration judgment unit, a guiding noise suppression unit, and an available airflow power calculation unit; the guiding opening adjustment unit adjusts the inlet air opening according to the inlet air velocity result, battery SOC, and energy recovery intensity; the airflow stabilization judgment unit generates a stabilization judgment result based on the airflow pulsation amplitude and the rotational speed fluctuation of the drum fan blades.

[0008] As a preferred technical solution of this scheme, the drum-type fan blade energy capture module includes a drum speed acquisition unit, a low wind speed start-up judgment unit, a fan blade load matching unit, an airflow torque calculation unit, a speed stabilization control unit, and a mechanical energy output unit; the fan blade load matching unit adjusts the working load of the drum fan blade according to the electromagnetic load state of the series axial flux power generation module; the speed stabilization control unit generates a load balance result based on the speed fluctuation amplitude.

[0009] As a preferred technical solution of this scheme, the series axial flux power generation module includes a generator speed acquisition unit, a series voltage superposition unit, a power generation estimation unit, a power generation load adjustment unit, an AC output monitoring unit, and a power generation status judgment unit; the series voltage superposition unit generates a series output voltage based on the output voltage of each axial flux power generation unit; the power generation status judgment unit generates four types of statuses: normal power generation, inefficient power generation, overload power generation, and protection shutdown.

[0010] As a preferred technical solution of this scheme, the vehicle operating condition signal acquisition module includes a vehicle speed acquisition unit, a battery SOC detection unit, a generator speed acquisition unit, an output voltage acquisition unit, an output current acquisition unit, a battery allowable charging acquisition unit, a vehicle energy consumption acquisition unit, and an ambient temperature acquisition unit; the vehicle operating condition signal acquisition module generates a comprehensive vehicle operating condition index based on vehicle speed, battery status, generator status, charging capability, and temperature status.

[0011] As a preferred technical solution of this scheme, the intelligent energy recovery control module includes an operating condition identification unit, a recovery intensity calculation unit, a power generation load adjustment unit, a current guide opening control unit, a low-power standby unit, a full-charge protection unit, and a closed-loop feedback correction unit. The operating condition identification unit generates five operating states based on the vehicle's comprehensive operating condition index: low-speed standby, urban driving, high-speed cruising, full-charge protection, and abnormal protection. The recovery intensity calculation unit generates the energy recovery intensity based on the vehicle's comprehensive operating condition index, power generation, battery SOC, and system protection status.

[0012] As a preferred technical solution of this scheme, the rectification and voltage regulation and battery charging module includes an AC rectification unit, a voltage regulation unit, a current limiting unit, an energy storage buffer unit, a battery charging judgment unit, a charging current calculation unit, and a charging status recording unit; the battery charging judgment unit generates three types of charging status: allowed charging, derating charging, and prohibited charging based on the battery SOC, allowable charging current, DC output voltage, and safety protection status.

[0013] As a preferred technical solution of this scheme, the safety protection and range assessment module includes an overvoltage protection unit, an overcurrent protection unit, an overtemperature protection unit, an overspeed protection unit, a vibration anomaly identification unit, a wind resistance gain judgment unit, a range auxiliary assessment unit, and a protection recording unit; the wind resistance gain judgment unit determines whether the system is in recovery mode based on the wind resistance increment and power generation revenue; the range auxiliary assessment unit generates range gain mileage based on the cumulative replenished power and the vehicle's average energy consumption.

[0014] The beneficial effects of this invention are as follows: (1) By combining the principle of guiding and stabilizing the airflow during driving with the energy capture of the drum-type fan blade, the airflow guiding and stabilizing module adjusts the air inlet opening, regulates airflow fluctuations and suppresses guiding noise. Then, the drum-type fan blade energy capture module generates stable mechanical rotational energy according to the airflow speed and fan blade load status, realizing continuous airflow energy capture under low-speed driving, idling coasting and high-speed cruising conditions, solving the technical problems of disordered air intake, difficulty in starting at low wind speed, high noise and large power generation fluctuation of traditional exposed fan blades.

[0015] (2) By utilizing the principle of coordinated matching between the drum fan blade and the series axial flux generator, the mechanical rotational energy output by the drum fan blade is transferred to multiple sets of axial flux generator units. Stable AC power output is achieved through series voltage superposition, power generation estimation, power generation load adjustment and AC output monitoring. This realizes low-speed high-density power generation, voltage superposition output and power generation status classification judgment, solving the technical problems of weak low-speed output, unstable power generation and insufficient matching with the speed of the vehicle-mounted fan blade of ordinary single generator.

[0016] (3) By utilizing the closed-loop linkage principle of vehicle operating condition signal acquisition, intelligent energy recovery control, rectification and voltage regulation for energy replenishment and safe range assessment, energy recovery intensity, current conduction opening, power generation load and target energy replenishment current are generated based on vehicle speed, battery SOC, power generation, allowable energy replenishment current, ambient temperature and safety protection status. This realizes high-speed enhanced recovery, low-speed low-power standby, full-charge stop energy replenishment, abnormal protection shutdown and range gain assessment, and solves the technical problems of lack of vehicle operating condition adaptation, insufficient battery energy replenishment safety and difficulty in judging wind resistance net benefit of the driving airflow power generation system. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the invention and do not constitute a limitation thereof.

[0018] Figure 1 This is a block diagram of the vehicle range assist control system based on driving airflow energy recovery proposed in this invention; Figure 2This is a diagram showing the relationship between the vehicle operating condition acquisition, energy recovery control, and safe range assessment modules proposed in this invention. Detailed Implementation

[0019] Example 1, see Figures 1-2 The present invention provides a vehicle range assist control system based on driving airflow energy recovery, including a driving airflow guiding and stabilizing module, a roller fan blade energy capture module, a series axial flux power generation module, a vehicle operating condition signal acquisition module, an intelligent energy recovery control module, a rectification and voltage regulation and battery replenishment module, and a safety protection and range assessment module.

[0020] The airflow guiding and stabilizing module is located in the windward area of ​​the vehicle. It receives the oncoming airflow generated during vehicle movement and generates the guiding opening adjustment result based on vehicle speed, air inlet angle, airflow fluctuation state and noise state, so that the airflow entering the system forms a stable airflow channel.

[0021] The drum-type fan blade energy capture module receives the stable airflow output from the driving airflow guiding and stabilizing module, and generates mechanical rotational energy based on the airflow speed, drum fan blade speed, fan blade load state and start-up threshold, so that the airflow kinetic energy under low-speed driving, idling coasting and high-speed cruising conditions can all enter the energy capture process.

[0022] The series axial flux power generation module receives the mechanical rotational energy output from the drum-type fan blade energy capture module, and generates AC power output through the series power generation of multiple sets of axial flux power generation units, so that a stable voltage output can still be formed when the drum fan blade rotates at low speed.

[0023] The vehicle operating condition signal acquisition module collects vehicle speed, battery SOC, generator speed, output voltage, output current, battery charging allowable current, vehicle energy consumption, and ambient temperature, and sends the vehicle operating condition signals to the intelligent energy recovery control module.

[0024] The intelligent energy recovery control module generates energy recovery intensity, generator load adjustment results, guide opening adjustment results, and energy replenishment control commands based on vehicle operating condition signals, airflow energy status, power generation status, battery SOC, and safety protection status. This enables the wind energy recovery intensity to be increased when driving at high speeds, the system load to be reduced when driving at low speeds, and the battery to enter a protection state when it is close to full charge.

[0025] The rectification, voltage regulation, and battery replenishment module receives AC power output from the series axial flux generator module and performs rectification, voltage regulation, current limiting, energy storage buffering, and battery replenishment control to generate DC replenishment power that meets the charging conditions of the vehicle's power battery.

[0026] The safety protection and range assessment module generates protection control results based on overvoltage, overcurrent, overtemperature, overspeed, vibration, full battery charge, circuit abnormality, and wind resistance gain status, and generates range auxiliary assessment results based on cumulative charging power, vehicle average energy consumption, and system operating time.

[0027] Through the above system, the present invention converts the oncoming airflow energy that was originally consumed during vehicle driving into controllable electrical energy, and realizes range assistance control through vehicle operating condition identification, power generation load adjustment, rectification and voltage stabilization for energy replenishment, and safety protection judgment. This solves the problems of traditional vehicle energy recovery mainly relying on braking scenarios, unutilized wind resistance energy, unstable on-board wind energy recovery and power generation, and lack of operating condition adaptability in energy replenishment control.

[0028] Example 2: Based on all the above examples, the airflow guiding and stabilizing module specifically includes an inlet air velocity identification unit, a guide opening adjustment unit, an airflow stabilization judgment unit, an impurity filtration judgment unit, a guide noise suppression unit, and an available airflow power calculation unit.

[0029] The air inlet speed recognition unit generates the air inlet speed result based on the vehicle speed and the cross-sectional area of ​​the air inlet channel. The airflow opening adjustment unit adjusts the air inlet opening based on the air inlet speed result, battery SOC, and energy recovery intensity. The airflow stabilization judgment unit generates the stabilization judgment result based on the airflow pulsation amplitude and the rotational speed fluctuation of the drum fan blades. The impurity filtration judgment unit generates the filter maintenance prompt based on the air inlet blockage status. The airflow noise suppression unit generates the noise reduction adjustment result based on the vehicle speed and the air inlet opening.

[0030] The recoverable power of the airflow can be calculated using the airflow power calculation unit based on the inlet air velocity, the cross-sectional area of ​​the inlet air passage, and the air density. The recoverable power of the airflow is calculated according to the following formula:

[0031] In the formula, This indicates the recoverable power of the airflow during travel. Indicates air density, Indicates the effective cross-sectional area of ​​the air inlet channel. Indicates the air intake velocity. This represents the flow guiding and stabilizing efficiency coefficient.

[0032] When the vehicle speed increases and the battery SOC is lower than the upper limit of the charging limit, the airflow opening adjustment unit increases the air inlet opening and improves the airflow stabilization efficiency coefficient. When the vehicle speed is low and the drum fan speed is lower than the start-up threshold, the airflow opening adjustment unit maintains a low-resistance standby opening. When the airflow pulsation amplitude exceeds the stabilization threshold, the airflow stabilization judgment unit triggers the airflow opening correction.

[0033] Regarding parameter adjustments: The effective cross-sectional area of ​​the air inlet channel is set based on the available installation space at the front of the vehicle, the vehicle's wind resistance limits, and noise limits. The airflow stabilization efficiency coefficient is corrected based on the shape of the airflow channel, the degree of filter blockage, and the air inlet angle. The upper limit of the air inlet opening is limited based on the upper limit of the vehicle's wind resistance increment.

[0034] Through the above processing, the airflow guiding and stabilizing module can form a stable airflow at different vehicle speeds and balance the airflow energy recovery and additional wind resistance, solving the problems of turbulent airflow, high noise and large power generation fluctuations of traditional exposed fan blades.

[0035] Example 3: Based on all the above examples, the drum-type fan blade energy capture module specifically includes a drum speed acquisition unit, a low wind speed start-up judgment unit, a fan blade load matching unit, an airflow torque calculation unit, a speed stabilization control unit, and a mechanical energy output unit.

[0036] The drum speed acquisition unit acquires the real-time speed of the drum fan blades; the low wind speed start-up judgment unit generates the start-up status based on the inlet air velocity and the start-up speed threshold; the fan blade load matching unit adjusts the working load of the drum fan blades based on the electromagnetic load status of the series axial flux power generation module; the airflow torque calculation unit generates the airflow torque result based on the airflow power, drum fan blade speed, and energy capture efficiency; and the speed stabilization control unit generates the load balance result based on the speed fluctuation amplitude.

[0037] The airflow torque calculation unit calculates the output torque of the drum fan blades according to the following formula:

[0038] In the formula, This indicates the output torque of the drum fan blades. This indicates the recoverable power of the airflow during travel. This indicates the energy capture efficiency of the drum fan blades. Indicates the angular velocity of the drum fan blades. This indicates a correction term to prevent sudden changes in slow computation.

[0039] When the angular velocity of the drum fan blade is lower than the low-speed protection threshold, the fan blade load matching unit reduces the power generation load and maintains the drum fan blade in the starting state. When the angular velocity of the drum fan blade is higher than the rated speed range, the speed stabilization control unit reduces the guide opening or increases the electromagnetic load. When the speed fluctuation exceeds the fluctuation threshold, the mechanical energy output unit stops increasing the load to the series axial flux power generation module.

[0040] Regarding parameter adjustments: The energy capture efficiency of the drum fan blades is calibrated based on the surface condition of the fan blades, the matching degree of the airflow channel, and the fan blade speed range. The low wind speed start threshold is set separately for three operating conditions: vehicle idling coasting, urban low speed, and high-speed cruising. The correction item to prevent sudden changes in low-speed calculation is set according to the sensor sampling period.

[0041] Through the above processing, the drum-type fan blade energy capture module can stably capture airflow energy under low and high speed driving conditions, and provide controllable mechanical input for the series axial flux power generation module, solving the problems of traditional vehicle-mounted fan blades being difficult to start at low wind speeds and having large speed fluctuations under high-speed conditions.

[0042] Example 4: Based on all the above examples, the series axial flux power generation module specifically includes a generator speed acquisition unit, a series voltage superposition unit, a power generation estimation unit, a power generation load adjustment unit, an AC output monitoring unit, and a power generation status judgment unit.

[0043] The generator speed acquisition unit collects the speed of each axial flux generator unit; the series voltage superposition unit generates a series output voltage based on the output voltage of each axial flux generator unit; the power generation estimation unit generates the power generation result based on the output voltage, output current, and power correction coefficient; the power generation load adjustment unit adjusts the load of the power generation module based on the energy recovery intensity; the AC output monitoring unit monitors voltage fluctuations, frequency fluctuations, and current fluctuations; and the power generation status judgment unit generates four types of statuses: normal power generation, inefficient power generation, overload power generation, and protection shutdown.

[0044] The power generation estimation unit calculates the output power of the power generation module according to the following formula:

[0045] In the formula, Indicates the output power of the power generation module. Indicates the series output voltage. Indicates the series output current. This indicates the axial flux power generation conversion efficiency.

[0046] The series output voltage is calculated using the following formula:

[0047] In the formula, Indicates the series output voltage. Indicates the number of axial flux generator units. Indicates the first The output voltage of each axial flux generator unit This represents the line voltage drop coefficient. This indicates the output current in series.

[0048] When the output voltage of any axial flux generator unit is lower than the unit voltage threshold, the generator state judgment unit generates an inefficient generator state. When the series output current exceeds the current limit, the generator load adjustment unit reduces the energy recovery intensity. When the AC output monitoring unit detects that the voltage fluctuation exceeds the fluctuation threshold, the series voltage superposition unit triggers voltage regulation compensation.

[0049] Regarding parameter adjustments: the axial flux power generation conversion efficiency is corrected based on the generator speed, coil temperature, and load conditions; the line voltage drop coefficient is calibrated based on the cable length, cable cross-sectional area, and interface temperature rise; and the number of axial flux power generation units is configured based on the vehicle installation space and the target power replenishment.

[0050] Through the above processing, the series axial flux generator module can output voltage by superimposing multiple axial flux generator units and maintain power generation stability according to the load condition, thus solving the problems of weak low-speed output, large voltage fluctuation and insufficient matching with the speed of the drum fan blades of ordinary single generators.

[0051] Example 5: Based on all the above examples, the vehicle operating condition signal acquisition module specifically includes a vehicle speed acquisition unit, a battery SOC detection unit, a generator speed acquisition unit, an output voltage acquisition unit, an output current acquisition unit, a battery allowable charging acquisition unit, a vehicle energy consumption acquisition unit, and an ambient temperature acquisition unit.

[0052] The vehicle speed acquisition unit collects the real-time speed of the vehicle; the battery SOC detection unit collects the remaining charge of the on-board power battery; the generator speed acquisition unit collects the speed of the series axial flux generator module; the output voltage acquisition unit collects the voltage before and after rectification; the output current acquisition unit collects the generation current and the charging current; the battery allowable charging current acquisition unit collects the current allowable charging current of the power battery; the vehicle energy consumption acquisition unit collects the energy consumption per unit mileage of the vehicle; and the ambient temperature acquisition unit collects the ambient temperature of the system's operating environment.

[0053] The vehicle operating condition comprehensive index is calculated according to the following formula:

[0054] In the formula, This indicates the vehicle's overall operating condition index. Indicates the vehicle's real-time speed. This indicates the vehicle's maximum speed limit, and SOC indicates the remaining charge of the onboard battery. Indicates the upper limit of the power battery capacity. Indicates the generator speed. Indicates the upper limit of generator speed. This indicates the current allowable charging current of the power battery. Indicates the maximum allowable charging current. Indicates the system ambient temperature. Indicates the upper limit of ambient temperature. , , , and These represent the weighting coefficients of the corresponding working condition factors.

[0055] When the vehicle operating condition comprehensive index increases, the intelligent energy recovery control module increases the energy recovery intensity. When the vehicle operating condition comprehensive index is lower than the standby threshold, the intelligent energy recovery control module reduces the current conduction opening and enters a low power consumption state. When the ambient temperature approaches the upper limit or the allowable charging current of the power battery decreases, the vehicle operating condition signal acquisition module generates a derating control flag.

[0056] Regarding parameter adjustments: Each weighting coefficient is calibrated based on vehicle type, driving scenario, power battery management strategy, and target range assistance requirements. When logistics vehicles have a high proportion of high-speed cruising, the vehicle speed weighting coefficient is increased. When urban commuter vehicles frequently start and stop, the battery SOC and allowable charging current weighting coefficients are increased.

[0057] Through the above processing, the vehicle operating condition signal acquisition module can uniformly convert vehicle speed, battery status, power generation status, energy replenishment capability, and temperature status into control data, solving the problem of the lack of vehicle-wide operating condition linkage in vehicle-mounted wind power generation systems.

[0058] Example 6: Based on all the above examples, the intelligent energy recovery control module specifically includes an operating condition identification unit, a recovery intensity calculation unit, a power generation load adjustment unit, a current guide opening control unit, a low-power standby unit, a full-charge protection unit, and a closed-loop feedback correction unit.

[0059] The operating condition identification unit generates five operating states based on the vehicle's comprehensive operating condition index: low-speed standby, city driving, high-speed cruising, full-charge protection, and abnormal protection. The energy recovery intensity calculation unit generates the energy recovery intensity based on the vehicle's comprehensive operating condition index, power generation, battery SOC, and system protection status. The power generation load adjustment unit adjusts the load of the series axial flux power generation module based on the energy recovery intensity. The current guide opening control unit adjusts the current guide opening based on the energy recovery intensity. The low-power standby unit reduces system power consumption in low-speed standby mode. The full-charge protection unit stops battery charging when the battery SOC exceeds the charging limit.

[0060] Energy recovery intensity is calculated using the following formula:

[0061] In the formula, Indicates the intensity of energy recovery. Indicates the basic recycling intensity. This indicates the vehicle's overall operating condition index. Indicates the output power of the power generation module. The system's rated power output is indicated by SOC, which indicates the remaining charge of the onboard battery. Indicates the upper limit of the power battery capacity. Indicates the safety protection status value. , , and These represent the weight coefficients of the corresponding control factors.

[0062] When the energy recovery intensity is higher than the high recovery threshold, the power generation load adjustment unit increases the power generation load and improves the supplementary energy output. When the energy recovery intensity is lower than the low recovery threshold, the guide opening control unit reduces the guide opening and reduces the load on the drum fan blades. When the safety protection status value increases, the closed-loop feedback correction unit reduces the power generation load and prioritizes the execution of protection control.

[0063] Regarding parameter adjustments: the basic recovery intensity is set according to the vehicle type and installation location, the rated power generation is determined according to the configuration of the series axial flux generation module, the safety protection status value is accumulated based on the risks of overvoltage, overcurrent, overtemperature, overspeed and vibration, and the weighting coefficient is calibrated based on the vehicle's wind resistance increment, energy replenishment requirements and battery protection strategy.

[0064] Through the above processing, the intelligent energy recovery control module can dynamically adjust the system's operating status according to vehicle speed, battery status, power generation capacity, and safety risks, solving the problem that traditional vehicle-mounted auxiliary power generation devices cannot simultaneously address energy replenishment efficiency, wind resistance loss, and battery safety.

[0065] Example 7: This example is based on all the above examples. The rectification, voltage regulation and battery charging module specifically includes an AC rectification unit, a voltage regulation unit, a current limiting unit, an energy storage buffer unit, a battery charging judgment unit, a charging current calculation unit and a charging status recording unit.

[0066] The AC rectifier unit converts the AC power output from the series axial flux generator module into DC power. The voltage regulator unit adjusts the DC output voltage according to the charging voltage range of the vehicle power battery. The current limiting unit limits the charging current according to the current allowable charging current of the power battery. The energy storage buffer unit absorbs the energy fluctuation of the power generation and smooths the output. The battery charging judgment unit generates three types of charging states: allowed charging, derating charging, and prohibited charging, based on the battery SOC, allowable charging current, DC output voltage, and safety protection status.

[0067] The energy replenishment current calculation unit calculates the target energy replenishment current according to the following formula:

[0068] In the formula, Indicates the target replenishment current. Indicates the output power of the power generation module. This indicates the rectification, voltage regulation, and energy compensation efficiency. Indicates the power battery charging voltage. This indicates the current allowable charging current of the power battery. This indicates the safety protection status value.

[0069] When the target charging current is greater than the current allowed charging current of the power battery, the current limiting unit performs current limiting according to the current allowed charging current of the power battery. When the battery SOC exceeds the charging limit, the battery charging judgment unit generates a charging prohibition state. When the energy storage buffer unit detects that the input power fluctuation exceeds the buffer threshold, the voltage regulation unit performs voltage regulation correction.

[0070] Regarding parameter adjustments: The rectification and voltage regulation energy replenishment efficiency is calibrated based on the rectifier temperature, output voltage, and load current. The power battery energy replenishment voltage is determined based on the energy replenishment window provided by the vehicle battery management system. The safety protection state value for the prohibited energy replenishment state is set to one, and the safety protection state value for the permitted energy replenishment state is set to zero.

[0071] Through the above processing, the rectifier and voltage regulator and battery power replenishment module can convert the fluctuating electrical energy generated by wind power generation into DC power replenishment energy that meets the requirements of the vehicle's power battery, and stop or reduce the power replenishment when the battery is fully charged, the temperature is abnormal, or the current exceeds the limit, thus solving the problems of unstable wind power generation output and insufficient safety of vehicle battery power replenishment.

[0072] Example 8: Based on all the above examples, the safety protection and endurance evaluation module specifically includes an overvoltage protection unit, an overcurrent protection unit, an overtemperature protection unit, an overspeed protection unit, a vibration anomaly identification unit, a wind resistance gain judgment unit, an endurance auxiliary evaluation unit, and a protection recording unit.

[0073] The overvoltage protection unit generates an overvoltage protection state when the series output voltage or DC output voltage exceeds the voltage limit; the overcurrent protection unit generates an overcurrent protection state when the series output current or replenishment current exceeds the current limit; the overtemperature protection unit generates an overtemperature protection state when the coil temperature, rectifier temperature, or controller temperature exceeds the temperature limit; the overspeed protection unit generates an overspeed protection state when the drum fan speed or generator speed exceeds the speed limit; the vibration anomaly identification unit generates a vibration anomaly state when the drum fan vibration or installation position vibration exceeds the vibration threshold; and the wind resistance gain judgment unit determines whether the system should maintain a recovery state based on the wind resistance increment and power generation revenue.

[0074] The range assist assessment unit calculates the range gain mileage based on the cumulative charging capacity and the vehicle's average energy consumption. The range gain mileage is calculated according to the following formula:

[0075] In the formula, Indicates the increase in driving range. Indicates the cumulative amount of electricity replenished. This indicates the average energy consumption per unit distance of the vehicle. This indicates the overall vehicle energy replenishment efficiency.

[0076] The drag gain assessment unit calculates the net benefit evaluation value according to the following formula:

[0077] In the formula, This represents the net income valuation. Indicates the output power of the power generation module. This indicates the power loss caused by additional wind resistance. This indicates the system's own power consumption.

[0078] When the net benefit evaluation value is greater than the net benefit threshold, the wind resistance gain judgment unit maintains the recovery state. When the net benefit evaluation value is not greater than the net benefit threshold, the intelligent energy recovery control module reduces the current conduction opening or enters a low power standby state. When any protection unit generates a protection state, the protection recording unit records the protection type, occurrence time, vehicle speed, battery SOC, power generation, and energy replenishment status.

[0079] Regarding parameter adjustments: The overall vehicle energy utilization efficiency is calibrated based on the charging acceptance capacity of the power battery, the efficiency of the energy replenishment line, and the vehicle energy management strategy. The power loss caused by additional wind resistance is corrected based on the test results of the guide opening, vehicle speed, and changes in vehicle wind resistance. The system's own power consumption is statistically analyzed based on the real-time power consumption of the controller, sensors, rectifier and voltage regulator unit, and execution unit.

[0080] Through the above processing, the safety protection and range assessment module can make a net benefit judgment between energy replenishment efficiency, additional wind resistance and system power consumption, and output auxiliary range results to the vehicle or user end through range gain mileage, solving the problem that the vehicle-mounted wind energy recovery system only focuses on power generation and ignores wind resistance loss and actual range benefit.

Claims

1. A vehicle range assist control system based on driving airflow energy recovery, characterized in that: It includes a driving airflow guiding and stabilizing module, a drum-type fan blade energy capture module, a series axial flux power generation module, a vehicle operating condition signal acquisition module, an intelligent energy recovery control module, a rectification and voltage regulation and battery replenishment module, and a safety protection and range assessment module; The airflow guiding and stabilizing module receives the oncoming airflow generated during vehicle movement and generates the guiding opening adjustment result based on vehicle speed, air inlet angle, airflow fluctuation state and noise state; The drum-type fan blade energy capture module receives the stable airflow output from the driving airflow guiding and stabilizing module, and generates mechanical rotational energy based on the airflow velocity, drum fan blade speed, fan blade load status and start-up threshold. The series axial flux power generation module receives the mechanical rotation energy output from the drum-type wind turbine energy capture module, and generates AC power output through multiple sets of axial flux power generation units connected in series. The vehicle operating condition signal acquisition module collects vehicle speed, battery SOC, generator speed, output voltage, output current, battery charging allowable current, vehicle energy consumption, and ambient temperature. The intelligent energy recovery control module generates energy recovery intensity, generator load adjustment results, guide flow opening adjustment results, and energy replenishment control commands based on vehicle operating condition signals, airflow energy status, power generation status, battery SOC, and safety protection status. The rectification and voltage regulation and battery power replenishment module receives the AC power output from the series axial flux power generation module and generates DC power replenishment that meets the charging conditions of the vehicle power battery. The safety protection and range assessment module generates protection control results based on overvoltage, overcurrent, overtemperature, overspeed, vibration, full battery charge, circuit abnormality, and wind resistance gain status, and generates range auxiliary assessment results based on cumulative charging power, vehicle average energy consumption, and system operating time.

2. The vehicle range assist control system based on driving airflow energy recovery according to claim 1, characterized in that: The airflow guiding and stabilizing module includes an inlet air velocity identification unit, a guide opening adjustment unit, an airflow stabilization judgment unit, an impurity filtration judgment unit, a guide noise suppression unit, and an available airflow power calculation unit; the inlet air velocity identification unit generates the inlet air velocity result based on the vehicle speed and the cross-sectional area of ​​the inlet air passage; The airflow opening adjustment unit adjusts the airflow opening based on the inlet air velocity, battery SOC, and energy recovery intensity. The airflow stabilization judgment unit generates a stabilization judgment result based on the airflow pulsation amplitude and the rotational speed fluctuation of the drum fan blades; The impurity filtration judgment unit generates a filter maintenance prompt based on the air inlet blockage status. The airflow noise suppression unit generates noise reduction adjustment results based on vehicle speed and air inlet opening.

3. The vehicle range assist control system based on driving airflow energy recovery according to claim 1, characterized in that: The drum-type fan blade energy capture module includes a drum speed acquisition unit, a low wind speed start-up judgment unit, a fan blade load matching unit, an airflow torque calculation unit, a speed stabilization control unit, and a mechanical energy output unit. The drum speed acquisition unit acquires the real-time speed of the drum fan blades; the low wind speed start-up judgment unit generates a start-up status based on the inlet air velocity and the start-up speed threshold; the fan blade load matching unit adjusts the working load of the drum fan blades according to the electromagnetic load status of the series axial flux power generation module; the speed stabilization control unit generates a load balance result based on the speed fluctuation amplitude; and the mechanical energy output unit outputs mechanical rotational energy to the series axial flux power generation module based on the load balance result.

4. A vehicle range assist control system based on driving airflow energy recovery according to claim 1, characterized in that: The series axial flux generator module includes a generator speed acquisition unit, a series voltage superposition unit, a power generation estimation unit, a power generation load adjustment unit, an AC output monitoring unit, and a power generation status judgment unit. The generator speed acquisition unit acquires the speed of each axial flux generator unit. The series voltage superposition unit generates a series output voltage based on the output voltage of each axial flux generator unit. The power generation estimation unit generates the power generation result based on the series output voltage, series output current, and power correction coefficient. The AC output monitoring unit monitors voltage fluctuations, frequency fluctuations, and current fluctuations. The power generation status judgment unit generates four types of statuses: normal power generation, inefficient power generation, overload power generation, and protection shutdown.

5. A vehicle range assist control system based on driving airflow energy recovery according to claim 1, characterized in that: The vehicle operating condition signal acquisition module includes a vehicle speed acquisition unit, a battery SOC detection unit, a generator speed acquisition unit, an output voltage acquisition unit, an output current acquisition unit, a battery allowable charging acquisition unit, a vehicle energy consumption acquisition unit, and an ambient temperature acquisition unit. The vehicle speed acquisition unit acquires the real-time speed of the vehicle; the battery SOC detection unit acquires the remaining charge of the on-board power battery; the generator speed acquisition unit acquires the rotational speed of the series axial flux generator module; and the output voltage acquisition unit acquires the voltage before and after rectification. The output current acquisition unit collects the generation current and the charging current; the battery allowable charging current acquisition unit collects the current allowable charging current of the power battery; the vehicle energy consumption acquisition unit collects the energy consumption per unit mileage of the vehicle; and the ambient temperature acquisition unit collects the ambient temperature of the system's operating environment.

6. A vehicle range assist control system based on driving airflow energy recovery according to claim 1, characterized in that: The intelligent energy recovery control module includes an operating condition identification unit, a recovery intensity calculation unit, a power generation load adjustment unit, a current guide opening control unit, a low-power standby unit, a full-charge protection unit, and a closed-loop feedback correction unit. The operating condition identification unit generates five operating states based on the vehicle's comprehensive operating condition index: low-speed standby, city driving, high-speed cruising, full-charge protection, and abnormal protection. The energy recovery intensity calculation unit generates the energy recovery intensity based on the vehicle's comprehensive operating condition index, power generation, battery SOC, and system protection status. The power generation load adjustment unit adjusts the load of the series axial flux power generation module based on the energy recovery intensity. The current guide opening control unit adjusts the current guide opening based on the energy recovery intensity. The low-power standby unit reduces system power consumption in low-speed standby mode. The full-charge protection unit stops battery charging when the battery SOC exceeds the charging limit.

7. A vehicle range assist control system based on driving airflow energy recovery according to claim 1, characterized in that: The rectification, voltage regulation, and battery charging module includes an AC rectification unit, a voltage regulation unit, a current limiting unit, an energy storage buffer unit, a battery charging judgment unit, a charging current calculation unit, and a charging status recording unit. The AC rectification unit converts the AC power output from the series axial flux generator module into DC power. The voltage regulation unit adjusts the DC output voltage according to the charging voltage range of the vehicle power battery. The current limiting unit limits the charging current according to the current allowable charging current of the power battery. The energy storage buffer unit absorbs the energy fluctuations of the power generation and smooths the output. The battery charging judgment unit generates three charging states: allowed charging, derating charging, and prohibited charging, based on the battery SOC, allowable charging current, DC output voltage, and safety protection status.

8. A vehicle range assist control system based on driving airflow energy recovery according to claim 1, characterized in that: The safety protection and range assessment module includes an overvoltage protection unit, an overcurrent protection unit, an overtemperature protection unit, an overspeed protection unit, a vibration anomaly identification unit, a wind resistance gain judgment unit, a range auxiliary assessment unit, and a protection recording unit. The overvoltage protection unit generates an overvoltage protection status when the series output voltage or DC output voltage exceeds the voltage limit. The overcurrent protection unit generates an overcurrent protection status when the series output current or charging current exceeds the current limit. The overtemperature protection unit generates an overtemperature protection status when the coil temperature, rectifier temperature, or controller temperature exceeds the temperature limit. The overspeed protection unit generates an overspeed protection status when the drum fan speed or generator speed exceeds the speed limit. The vibration anomaly identification unit generates a vibration anomaly status when the drum fan vibration or installation location vibration exceeds the vibration threshold. The wind resistance gain judgment unit generates a net benefit evaluation value based on the wind resistance increment and power generation revenue. The range auxiliary assessment unit generates a range gain mileage based on the cumulative charging power and the vehicle's average energy consumption.

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