Control method and device for range extender power generation, electronic equipment and storage medium

Abstract

This application provides a control method, apparatus, electronic device, and storage medium for range extender power generation. The control method for range extender power generation includes: acquiring the total power generation of a target vehicle, the maximum allowable charging power of the power battery, and the driving conditions; and controlling the current power generation of the range extender and / or the regenerative braking power of the drive motor of the target vehicle based on the total power generation of the target vehicle, the maximum allowable charging power of the power battery, and the driving conditions. Specifically, when the driving conditions are energy recovery conditions and the total power generation is greater than the maximum allowable charging power of the power battery, the current power generation of the range extender and / or the regenerative braking power of the drive motor are adjusted so that the total power generation is less than or equal to the maximum allowable charging power of the power battery. The adjustment priority of the current power generation of the range extender is higher than the adjustment priority of the regenerative braking power of the drive motor.

Description

Technical Field

[0001] This application relates to the field of vehicle energy management, and more specifically, to a control method, apparatus, electronic device, and storage medium for range extender power generation. Background Technology

[0002] Currently, range-extended electric vehicles (EREVs) are typically equipped with a range extender (such as an internal combustion engine + generator) and a drive motor system. During vehicle operation, the range extender can generate electricity based on the battery's state of charge (SOC) to supplement electrical energy; simultaneously, when the vehicle decelerates or brakes, the drive motor can achieve regenerative braking, converting kinetic energy into electrical energy and feeding it back to the battery.

[0003] When a vehicle is in a high-energy-recovery scenario (such as a long incline) and the battery's state of charge (SOC) is high, the battery's allowable charging power is relatively low. If the range extender is still generating electricity at this time, the total input power will exceed the battery's maximum charging capacity, potentially leading to overcharging and, in severe cases, affecting battery life and even safety. Existing technologies address this issue by limiting regenerative torque or disabling regenerative braking, but this sacrifices braking performance and energy recovery efficiency, impacting driving experience and range. Summary of the Invention

[0004] The purpose of this application is to provide a control method, device, electronic device and storage medium for range extender power generation, so as to at least solve the technical problem of reduced braking performance and energy waste caused by reducing the regenerative power of the drive motor.

[0005] In a first aspect, the present invention provides a control method for generating electricity using a range extender, the method comprising: Obtain the target vehicle's total power generation capacity, maximum allowable charging power of the power battery, and operating conditions; Based on the target vehicle's total power generation, the maximum allowable charging power of the power battery, and the driving condition control of the target vehicle's current power generation of the range extender and / or the regenerative braking power of the drive motor, wherein: When the driving condition is an energy recovery condition and the total power generation is greater than the maximum allowable charging power of the power battery, the current power generation of the range extender and / or the recovery power of the drive motor are adjusted so that the total power generation is less than or equal to the maximum allowable charging power of the power battery. The adjustment priority of the current power generation of the range extender is higher than the adjustment priority of the recovery power of the drive motor.

[0006] In the above implementation process, under the condition of energy recovery and when the total power generation is greater than the maximum allowable charging power of the power battery, the range extender's current power generation is adjusted first, rather than the drive motor's recovery power, based on the adjustment priority. The drive motor's recovery power is not limited to achieve the goal of limiting the total power generation to below the maximum allowable charging power of the power battery. Furthermore, since the drive motor's recovery power is not limited, the reverse torque generated by the vehicle based on the drive motor's recovery power will not decrease, and consequently, the regenerative braking force corresponding to the reverse torque will not decrease. Therefore, under the premise that the mechanical friction braking force remains unchanged, the overall braking performance of the vehicle will not deteriorate. Thus, by avoiding limiting the drive motor's recovery power, the vehicle's braking performance can be prevented from being restricted. On the other hand, since the drive motor's recovery power does not decrease, the energy recovered per unit time will not decrease, thereby reducing the probability of energy waste.

[0007] In an optional implementation, adjusting the current power generation of the range extender and / or the power recovery of the drive motor to make the total power generation less than or equal to the maximum allowable charging power of the power battery includes: Reduce the current power generation of the range extender while keeping the power recovered by the drive motor constant; Obtain the lower limit of the range extender's power generation, and if the current power generation of the range extender has dropped to less than or equal to the lower limit of the range extender's power generation, determine whether the total power generation is greater than the maximum allowable charging power of the power battery. When the total power generation exceeds the maximum allowable charging power of the power battery, the power recovery power of the drive motor is reduced so that the total power generation is less than or equal to the maximum allowable charging power of the power battery.

[0008] In the above implementation process, the current power generation of the range extender is first reduced while the power recovery of the drive motor remains unchanged. When the current power generation of the range extender has been reduced to the level of the lower limit of the range extender's power generation, the power recovery of the drive motor is reduced to ensure that the power battery is not overcharged.

[0009] In an optional implementation, reducing the current power generation of the range extender includes: Obtain the power descent curve of the range extender; The range extender's current power generation is controlled to decrease based on the range extender's power reduction curve.

[0010] In the above implementation process, controlling the current power generation of the range extender to decrease based on the range extender power reduction curve can avoid vehicle vibration.

[0011] In an optional implementation, the step of controlling the current power generation of the range extender and / or the regenerative braking power of the drive motor based on the total power generation of the target vehicle, the maximum allowable charging power of the power battery, and the driving conditions further includes: Under the condition that the driving condition exits the energy recovery condition or the power recovery of the drive motor naturally decreases, determine whether the total power generation is less than the maximum allowable charging power of the power battery; The charging status of the target vehicle is determined when the total power generation is less than the maximum allowable charging power of the power battery. Under the condition that the charging status indicates that the target vehicle has a charging demand, the current power generation of the range extender is increased.

[0012] In the above implementation process, when the energy recovery mode is exited during driving or the recovery power of the drive motor naturally decreases, and the vehicle has a charging demand, the current power generation of the range extender can be restored to meet the charging demand.

[0013] In an optional implementation, the step of controlling the current power generation of the range extender and / or the regenerative braking power of the drive motor based on the total power generation of the target vehicle, the maximum allowable charging power of the power battery, and the driving conditions further includes: Under the condition that the total power generation is less than the maximum allowable charging power of the power battery, the driving scenario data of the target vehicle is obtained; Based on the driving scenario data of the target vehicle, determine whether the total power generation power is greater than the maximum allowable charging power of the power battery at the next moment; If the total power generation is greater than the maximum allowable charging power of the power battery at the next moment, the adjustment of the current power generation of the range extender and / or the power recovery of the drive motor is performed at the current moment.

[0014] In the above implementation process, it is possible to predict in advance whether the total power generation will be greater than the maximum allowable charging power of the power battery at the next moment, thereby reducing the current power generation of the range extender and / or the power recovery of the drive motor in advance.

[0015] In an optional implementation, the driving scenario data includes slope recognition data and the navigation information; The step of determining whether the total power generation at the next moment is greater than the maximum allowable charging power of the power battery based on the driving scenario data of the target vehicle includes: Based on the slope recognition data and the navigation information, it is determined whether the total power generation power at the next moment is greater than the maximum allowable charging power of the power battery. Specifically, when the slope recognition data indicates that the driving slope of the target vehicle is greater than or equal to the target slope, and the navigation information indicates that the length of the forward driving path of the target vehicle is greater than or equal to the target mileage, it is determined that the total power generation power at the next moment is greater than the maximum allowable charging power of the power battery.

[0016] In the above implementation process, based on the slope identification data and the navigation information, it can be predicted in advance whether it is necessary to reduce the current power generation of the range extender and / or the power recovery of the drive motor.

[0017] In an optional implementation, the specific method for obtaining the maximum allowable charging power of the power battery includes: Obtain the battery performance parameters of the target vehicle, wherein the battery performance parameters include at least the battery state of charge, battery temperature, and battery health status; The maximum allowable charging power of the power battery is dynamically determined based on the battery performance parameters.

[0018] In the above implementation process, the maximum allowable charging power of the power battery can be dynamically calculated based on the battery's remaining charge, battery temperature, and battery health status, thereby improving the accuracy of the calculation of the maximum allowable charging power of the power battery.

[0019] In a second aspect, the present invention provides a control device for generating electricity using a range extender, the device comprising: The acquisition module is used to acquire the target vehicle's total power generation, maximum allowable charging power of the power battery, and driving conditions. The control module is used to control the current power generation of the range extender and / or the regenerative braking power of the drive motor of the target vehicle based on the total power generation of the target vehicle, the maximum allowable charging power of the power battery, and the driving conditions, wherein: When the driving condition is an energy recovery condition and the total power generation is greater than the maximum allowable charging power of the power battery, the current power generation of the range extender and / or the recovery power of the drive motor are adjusted so that the total power generation is less than or equal to the maximum allowable charging power of the power battery. The adjustment priority of the current power generation of the range extender is higher than the adjustment priority of the recovery power of the drive motor.

[0020] In the aforementioned implementation process, under energy recovery conditions and when the total power generation exceeds the maximum allowable charging power of the power battery, the device prioritizes adjusting the current power generation of the range extender, rather than prioritizing the regenerative braking power of the drive motor. It avoids limiting the regenerative braking power of the drive motor to achieve a total power generation below the maximum allowable charging power of the power battery. Furthermore, since the regenerative braking power of the drive motor is not limited, the reverse torque generated by the vehicle based on this power generation will not decrease, and consequently, the regenerative braking force corresponding to the reverse torque will not decrease. Therefore, with the mechanical friction braking force remaining constant, the overall braking performance of the vehicle will not deteriorate. Thus, by avoiding limiting the regenerative braking power of the drive motor, the vehicle's braking performance can be prevented from being restricted. On the other hand, since the regenerative braking power of the drive motor does not decrease, the energy recovered per unit time will not decrease, thereby reducing the probability of energy waste.

[0021] Thirdly, the present invention provides an electronic device, comprising: Processor; and The memory is configured to store machine-readable instructions that, when executed by the processor, perform the control method for range extender power generation as described in any of the foregoing embodiments.

[0022] In the above implementation process, the electronic device, under the condition of energy recovery and when the total power generation is greater than the maximum allowable charging power of the power battery, prioritizes adjusting the current power generation of the range extender, rather than adjusting the recovery power of the drive motor, based on adjustment priority. It avoids limiting the recovery power of the drive motor to achieve the goal of limiting the total power generation below the maximum allowable charging power of the power battery. Furthermore, since the recovery power of the drive motor is not limited, the reverse torque generated by the vehicle based on the recovery power of the drive motor will not decrease, and the regenerative braking force corresponding to the reverse torque will not decrease. Therefore, under the premise that the mechanical friction braking force remains unchanged, the overall braking performance of the vehicle will not decrease. Thus, by avoiding limiting the recovery power of the drive motor, the braking performance of the vehicle can be avoided. On the other hand, since the recovery power of the drive motor will not decrease, the energy recovered per unit time will not decrease, thereby reducing the probability of energy waste. Fourthly, the present invention provides a storage medium storing a computer program, which is executed by a processor using the range extender power generation control method as described in any of the foregoing embodiments.

[0023] In the above implementation process, under the condition of energy recovery and when the total power generation is greater than the maximum allowable charging power of the power battery, the storage medium, based on adjustment priority, prioritizes adjusting the current power generation of the range extender, rather than prioritizing adjusting the regenerative braking power of the drive motor. It avoids limiting the regenerative braking power of the drive motor to achieve a total power generation limit below the maximum allowable charging power of the power battery. Furthermore, since the regenerative braking power of the drive motor is not limited, the reverse torque generated by the vehicle based on the regenerative braking power will not decrease, and consequently, the regenerative braking force corresponding to the reverse torque will not decrease. Therefore, under the premise that the mechanical friction braking force remains unchanged, the overall braking performance of the vehicle will not deteriorate. Thus, by avoiding limiting the regenerative braking power of the drive motor, the braking performance of the vehicle can be prevented from being restricted. On the other hand, since the regenerative braking power of the drive motor will not decrease, the energy recovered per unit time will not decrease, thereby reducing the probability of energy waste. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic flowchart of a control method for range extender power generation provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a control device for range extender power generation provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0027] Please see Figure 1 , Figure 1 This is a schematic flowchart illustrating a control method for range extender power generation provided in an embodiment of this application. Figure 1 As shown, the method includes the following steps: 101. Obtain the target vehicle's total power generation, maximum allowable charging power of the power battery, and operating conditions; 102. Based on the total power generation of the target vehicle, the maximum allowable charging power of the power battery, and the driving condition, control the current power generation of the range extender and / or the regenerative braking power of the drive motor of the target vehicle, wherein: when the driving condition is an energy recovery condition and the total power generation is greater than the maximum allowable charging power of the power battery, adjust the current power generation of the range extender and / or the regenerative braking power of the drive motor so that the total power generation is less than or equal to the maximum allowable charging power of the power battery, and the adjustment priority of the current power generation of the range extender is higher than the adjustment priority of the regenerative braking power of the drive motor.

[0028] In this embodiment, the target vehicle refers to a hybrid vehicle equipped with a range extender and a power battery, which can be a series range-extended electric vehicle or a parallel hybrid electric vehicle.

[0029] In this embodiment, the total power generation refers to the sum of the power generation generated by the range extender and the power recovery generated by the drive motor in energy recovery mode at any given time. It can be the algebraic sum of the DC power after rectification of the AC power output by the range extender and the DC power fed back by the drive motor, or it can be the total system input power after being uniformly measured by the vehicle power management system.

[0030] In this embodiment, the maximum allowable charging power of the power battery refers to the maximum instantaneous charging power value allowed by the battery management system to ensure battery safety and lifespan under the current battery state. This power can be a power threshold dynamically calculated based on the battery's state of charge (SOC), battery temperature, and state of health (SOH), or it can be a lookup value from a preset safe power upper limit table. For example, sensors can collect real-time data on the battery pack's SOC at 60%, battery temperature at 25°C, and SOH at 95%. Based on these parameters, a lookup operation is performed on the preset safe power upper limit table, where the horizontal axis represents the SOC range, the vertical axis represents the temperature range, and the vertical axis represents the power value. When the SOC is found to be in the 50%-70% range and the temperature in the 20°C-30°C range, the corresponding benchmark maximum charging power is 80kW.

[0031] In this embodiment, the driving condition refers to the driving state of the vehicle when it is running on the road. It can be a basic driving state such as acceleration, constant speed, coasting, and braking, or a complex scenario such as uphill, downhill, congestion, and high-speed cruising identified by vehicle sensors or navigation information.

[0032] In this embodiment, the energy recovery condition refers to a specific driving condition in which the vehicle is in a deceleration or braking state and the drive motor is working in generator mode to convert the vehicle's kinetic energy into electrical energy. It can be active braking energy recovery triggered by the driver pressing the brake pedal, or passive coasting energy recovery triggered by the vehicle coasting after the accelerator pedal is released.

[0033] In this embodiment, the current power output of the range extender refers to the electrical power actually output by the range extender at the current moment for charging the power battery or driving the vehicle. It can be the real-time output power generated by the generator driven by the engine, or the output power adjusted by the DC-DC converter.

[0034] In this embodiment, the regenerative power of the drive motor refers to the instantaneous power of the drive motor in energy recovery mode, which converts the vehicle's kinetic energy into electrical energy and feeds it back to the power battery. It can be the power generated by the motor controller according to the negative torque generated by the braking demand command, or it can be the theoretical regenerative power calculated based on the vehicle speed and motor speed.

[0035] In this embodiment, the adjustment priority refers to the order in which the control system executes adjustment commands for different power sources when it is necessary to reduce the total power generation. It can be a preset software logic judgment order or a weighted sorting based on the degree of impact of different adjustment methods on vehicle performance.

[0036] In this embodiment, a specific method for controlling the target vehicle's range extender's current power generation and / or drive motor's regenerative braking power based on the target vehicle's total power generation, the maximum allowable charging power of the power battery, and the driving condition can be as follows: The vehicle controller (VCU) periodically reads the maximum allowable charging power of the power battery from the battery management system (BMS), reads the current power generation of the range extender and the regenerative braking power of the drive motor from the range extender controller and the motor controller, respectively, and combines the braking signal obtained from the body controller to determine whether it is in an energy recovery condition; when it is confirmed that it is in an energy recovery condition and the total power generation exceeds the limit, the VCU first sends a command to the range extender controller to reduce the power generation.

[0037] In this embodiment, a specific approach based on the target vehicle's total power generation, the maximum allowable charging power of the power battery, the current power generation of the range extender of the target vehicle under driving conditions, and / or the power recovery of the drive motor can be as follows: establish a state machine that includes the total power generation, battery charging limit, and operating condition flags; when the state machine detects that the "energy recovery" flag is activated and the condition "total power generation > battery charging limit" is met, the state machine automatically switches to the "prioritize reducing range extender power" state. In this state, the system only allows adjustment of the range extender power until the total power generation drops to a safe range or the range extender reaches its lower power limit.

[0038] In the above implementation process, under the condition of energy recovery and the total power generation is greater than the maximum allowable charging power of the power battery, the current power generation of the range extender is adjusted first based on the adjustment priority, rather than the power recovery of the drive motor. This reduces the probability of decreased braking performance and energy waste caused by adjusting the power recovery of the drive motor.

[0039] For example, when a vehicle is performing energy recovery on a long downhill section, the drive motor generates a significant amount of regenerative power. Simultaneously, if the range extender is still generating electricity at a high power, the combined power output can easily exceed the charging capacity of the battery. Without control, this could lead to battery overcharging, triggering a protection mechanism to interrupt charging and wasting energy. Traditional control strategies directly reduce the drive motor's regenerative power to quickly lower the total power, but this weakens the vehicle's braking performance, forcing the driver to use mechanical braking more frequently, reducing energy recovery efficiency and increasing brake pad wear. The technical solution in this embodiment prioritizes the range extender's power adjustment, reducing or even shutting down its power generation, thus providing ample battery charging space for the drive motor's energy recovery. In this way, while ensuring battery safety, it maximizes the utilization of regenerative braking, maintaining good braking performance and energy efficiency, and avoiding a decline in driving experience and component wear caused by frequent switching of braking modes.

[0040] In an optional implementation, adjusting the current power generation of the range extender and / or the regenerative braking power of the drive motor to make the total power generation less than or equal to the maximum allowable charging power of the power battery includes: Reduce the current power output of the range extender while keeping the power recovered by the drive motor constant; Obtain the lower limit of the range extender's power generation, and determine whether the total power generation is greater than the maximum allowable charging power of the power battery when the current power generation of the range extender has dropped to less than or equal to the lower limit of the range extender's power generation. When the total power generation exceeds the maximum allowable charging power of the power battery, the power recovery of the drive motor is reduced so that the total power generation is less than or equal to the maximum allowable charging power of the power battery.

[0041] In this embodiment, the lower limit of the range extender's power generation refers to the minimum power generation value set to maintain the stable operation of the range extender or to meet the minimum power demand of the vehicle's accessories. It can be the minimum stable power generation corresponding to the engine's idle speed, or it can be the minimum power threshold required to ensure the normal operation of key accessories such as air conditioning and power steering.

[0042] In this embodiment, a specific way to reduce the current power generation of the range extender while keeping the regenerative power of the drive motor constant is as follows: the vehicle controller sends a target power command to the range extender controller, the value of which is lower than the current power generation but higher than the lower limit of the range extender's power generation; at the same time, it sends a locking command to the motor controller to keep the current regenerative torque command unchanged, thereby keeping the regenerative power constant.

[0043] In this embodiment, a specific way to reduce the current power generation of the range extender while keeping the power recovery of the drive motor unchanged is to set a power allocation flag in the control algorithm. When this control logic is entered, the power request channel of the range extender is set to the "active adjustment" state, while the power request channel of the drive motor is set to the "frozen" state. The system only responds to the power adjustment from the range extender side, ensuring that the power recovery of the motor is not affected.

[0044] In the above implementation process, the current power generation of the range extender is reduced first, while the power recovery of the drive motor remains unchanged. When the current power generation of the range extender has been reduced to the level of the lower limit of the range extender's power generation, the power recovery of the drive motor is reduced to ensure that the power battery is not overcharged.

[0045] For example, when a vehicle frequently starts and stops on urban roads, regenerative braking is constantly triggered. If the range extender is still charging a low-charge battery at this time, the total power generation can easily exceed the battery's capacity. This implementation first frees up battery charging space by reducing the range extender's power, which does not affect the vehicle's braking performance. Only when the range extender's power has dropped to its physical or strategic lower limit (e.g., it cannot be reduced further to avoid engine stalling), and the total power still exceeds the limit, does the regenerative braking power of the motor begin to be reduced. This phased, guaranteed control strategy maximizes efficient energy recovery, sacrificing some recovery only when absolutely necessary, thereby optimizing overall energy utilization efficiency and driving smoothness while ensuring battery safety.

[0046] In an optional implementation, reducing the current power output of the range extender includes: Obtain the power descent curve of the range extender; The range extender's current power generation is controlled based on the range extender's power descent curve.

[0047] In this embodiment, the range extender power descent curve refers to a pre-set or real-time calculated function that describes the smooth decrease of the range extender's power generation over time. It can be a linear sloping descent curve or a non-linear S-shaped smooth transition curve.

[0048] In this embodiment, a specific way to control the current power generation of the range extender based on the power descent curve of the range extender can be: storing the descent curve in the non-volatile memory of the controller, and when it is necessary to reduce the power, the controller looks up the target power value from the curve according to the current time and the preset descent rate, and sends this as an instruction to the range extender controller.

[0049] In this embodiment, a specific way to control the current power generation of the range extender based on the power descent curve of the range extender can also be: adopting a closed-loop control strategy, the controller uses the theoretical power value on the descent curve as a reference, compares the actual output power of the range extender in real time, and dynamically adjusts the engine throttle opening or generator excitation current through the PID (proportional-integral-derivative) algorithm so that the actual power accurately tracks the descent curve.

[0050] In the above implementation process, controlling the current power generation of the range extender to decrease based on the range extender power reduction curve can avoid vehicle vibration.

[0051] For example, a range extender consists of an engine and a generator. Sudden changes in its power output can cause drastic changes in engine speed and torque, which are then transmitted to the passenger compartment through the vehicle structure, producing perceptible vibrations or noises that severely affect driving comfort. For instance, a sudden and significant reduction in range extender power during high-speed cruising can cause the engine to jerk due to the abrupt decrease in load. By introducing a descent curve to achieve a smooth power transition, the engine can smoothly adapt to the new operating point, effectively suppressing torque shocks and speed fluctuations.

[0052] In an optional implementation, based on the target vehicle's total power generation, the maximum allowable charging power of the power battery, the current power generation of the range extender of the target vehicle under driving conditions, and / or the regenerative braking power of the drive motor, the system further includes: Under the condition that the energy recovery mode is exited during driving or the recovery power of the drive motor naturally decreases, determine whether the total power generation is less than the maximum allowable charging power of the power battery. Determine the charging status of the target vehicle when the total power generation is less than the maximum allowable charging power of the power battery. Under the condition that the charging status indicates that the target vehicle has a charging demand, the current power generation of the range extender is increased.

[0053] In this embodiment, exiting the energy recovery mode means that the vehicle returns from a deceleration or braking state to an acceleration or constant speed state, the drive motor stops generating electricity and may switch to drive mode. This can be the driver releasing the brake pedal and pressing the accelerator pedal, or the vehicle entering a flat road for coasting after completing a downhill slope.

[0054] In this embodiment, the natural decrease of the regenerative power of the drive motor refers to the process in which, without active braking command, the regenerative power gradually decreases to zero as the vehicle speed naturally decreases due to frictional resistance. This can be the inertial coasting of the vehicle after releasing the accelerator on a flat road, or the slow decrease of vehicle speed when going uphill on a gentle slope.

[0055] In this embodiment, the charging status refers to comprehensive status information that characterizes whether the vehicle's power battery currently needs to be replenished with energy. It can be based on whether the battery's state of charge (SOC) is lower than a preset charging threshold, or it can be based on whether there is a next charging station in the route planned by the navigation system and whether the current remaining driving range is sufficient.

[0056] In this embodiment, "having a charging need" refers to a state in which the vehicle system determines that it needs to start or enhance the range extender to generate electricity to replenish the battery charge. This can be due to the SOC being lower than the level required to maintain efficient driving, or it can be due to the need to store electrical energy for upcoming high-energy-consuming road sections (such as long uphill sections).

[0057] In this embodiment, under the condition that the charging status indicates that the target vehicle has a charging demand, a specific way to increase the current power generation of the range extender can be: when the energy recovery is detected to be over and the battery has a charging demand, the vehicle controller sends a power ramp command to the range extender controller. The command gradually increases the power generation to the target value that can meet the current charging demand according to the preset power ramp rate.

[0058] In this embodiment, under the condition that the target vehicle has a charging demand, another specific way to increase the current power generation of the range extender is to establish a charging demand level table, where different SOC ranges correspond to different target power outputs of the range extender. When the conditions are met, the controller queries the table based on the current SOC and directly sets the range extender power to the corresponding optimal operating point, thus balancing charging efficiency and fuel economy.

[0059] In the above implementation process, when the energy recovery mode is exited during driving or the power recovery of the drive motor naturally decreases, and the vehicle has a charging demand, the current power generation of the range extender can be restored to meet the charging demand.

[0060] For example, after a vehicle completes energy recovery on a long downhill section, the battery's SOC may have been significantly replenished, at which point the range extender may be in a low-power or off state. However, if the vehicle is about to enter a long stretch of highway or congested road, it will rely primarily on battery power, posing a risk of battery depletion. This implementation intelligently identifies when energy recovery ends and, based on the vehicle's charging needs (such as low SOC or a long route planned by navigation), proactively and promptly increases the range extender's power to replenish the battery.

[0061] In an optional implementation, based on the target vehicle's total power generation, the maximum allowable charging power of the power battery, the current power generation of the range extender of the target vehicle under driving conditions, and / or the regenerative braking power of the drive motor, the system further includes: Under the condition that the total power generation is less than the maximum allowable charging power of the power battery, obtain the driving scenario data of the target vehicle; Based on the driving scenario data of the target vehicle, determine whether the total power generation power is greater than the maximum allowable charging power of the power battery at the next moment; If the total power generation is greater than the maximum allowable charging power of the power battery at the next moment, the current power generation of the range extender and / or the power recovery of the drive motor will be adjusted at the current moment.

[0062] In this embodiment, driving scenario data refers to predictive information that can reflect the future driving status of the vehicle. It can be information on the slope, curvature, and speed limit of the road ahead from high-precision maps and GPS, or information on traffic flow and obstacles ahead from cameras and radar.

[0063] In this embodiment, the next moment refers to a preset, relatively short future time window, which can be any moment within the next 5 seconds, or the time when the vehicle travels to the next critical path point (such as the starting point of the downhill section).

[0064] In this embodiment, a specific way to determine whether the total power generation is greater than the maximum allowable charging power of the power battery at the next moment based on the driving scenario data of the target vehicle can be: extract the road slope sequence of N kilometers ahead using navigation map data, combine it with the vehicle dynamics model, simulate and calculate the theoretical recovery power that may be generated when entering the downhill section in the future under the current vehicle speed and driving style, and superimpose it with the current range extender power to predict the total power generation.

[0065] In this embodiment, a specific way to determine whether the total power generation is greater than the maximum allowable charging power of the power battery at the next moment based on the driving scenario data of the target vehicle can be: by using a forward-looking camera to identify traffic signs or road features on a long downhill slope in real time, and combining this with millimeter-wave radar to detect that there is no congestion ahead, it can be inferred that the vehicle is about to enter a working condition in which high-intensity energy recovery can be carried out continuously, and thus predict that the total power generation will surge.

[0066] In the above implementation process, it is possible to predict in advance whether the total power generation will be greater than the maximum allowable charging power of the power battery at the next moment, thereby reducing the current power generation of the range extender and / or the power recovery of the drive motor in advance.

[0067] For example, when a vehicle is about to enter a known long and steep downhill section at the top of a mountain, the system receives this information in advance through navigation data. Even if the current total power is still within a safe range, the system will anticipate that the huge regenerative power generated by the conversion of gravitational potential energy a few seconds later will cause the total power to far exceed the battery's limit. Therefore, the system will reduce the range extender's power in advance and smoothly, or even shut it down.

[0068] In an optional implementation, the driving scenario data includes slope recognition data and navigation information; Determining whether the total power generation capacity exceeds the maximum allowable charging capacity of the power battery at the next moment based on the target vehicle's driving scenario data includes: Based on slope recognition data and navigation information, it is determined whether the total power generation power is greater than the maximum allowable charging power of the power battery at the next moment. Specifically, when the slope recognition data indicates that the driving slope of the target vehicle is greater than or equal to the target slope, and the navigation information indicates that the length of the driving path ahead of the target vehicle is greater than or equal to the target mileage, it is determined that the total power generation power is greater than the maximum allowable charging power of the power battery at the next moment.

[0069] In this embodiment, slope recognition data refers to the slope information of the vehicle's current and the road ahead, which is acquired in real time or near real time. It can be the current slope estimated by fusing the vehicle's longitudinal acceleration sensor and vehicle speed signal, or it can be the accurate slope profile data of the road ahead obtained through a high-precision map API.

[0070] In this embodiment, navigation information refers to detailed data about the vehicle's planned route provided by the vehicle navigation system. It can be a sequence of waypoints that includes changes in altitude, or road segment information marked with semantic tags such as "long downhill" or "accident-prone".

[0071] In this embodiment, the target slope refers to a preset slope threshold, which is used to determine whether the steepness of the downhill slope is sufficient to generate significant recovery power. It can be -4% (the negative sign represents a downhill slope) or -6%, and the specific value can be calibrated according to the vehicle model and motor characteristics.

[0072] In this embodiment, the target mileage refers to a preset distance threshold used to determine whether the length of the downhill section is sufficient to maintain continuous energy recovery. It can be 500 meters or 1 kilometer to ensure the effectiveness of the prediction and avoid misjudgment caused by short-term fluctuations.

[0073] In this embodiment, a specific way to determine whether the total power generation power is greater than the maximum allowable charging power of the power battery at the next moment based on slope recognition data and navigation information can be as follows: The controller periodically queries the road slope data within a 2-kilometer range centered on the vehicle's current location from the high-precision map service to construct a slope-distance array; then iterates through the array to find whether there is a continuous downhill section with an average slope of less than or equal to -5% and a length of more than 800 meters. If it exists, a prediction is triggered.

[0074] In this embodiment, a specific method for determining whether the total power generation capacity exceeds the maximum allowable charging power of the power battery at the next moment based on slope recognition data and navigation information can be as follows: The path key points (such as the top and bottom of the slope) in the navigation information are spatiotemporally aligned with the slope recognition data to form a predictive corridor. When the system confirms that the vehicle will enter a corridor area with a slope <-4% and a duration >30 seconds within the next T seconds, it determines that the total power generation capacity will exceed the limit at the next moment.

[0075] In the above implementation process, based on slope identification data and navigation information, it is possible to predict in advance whether it is necessary to reduce the current power generation of the range extender and / or the power recovery of the drive motor.

[0076] For example, if the map shows a long downhill slope ahead, and the vehicle's IMU (Inertial Measurement Unit) also detects that a slight downhill tilt has begun, this double verification greatly improves the accuracy of the prediction. Only when the downhill slope is both steep enough (greater than the target gradient) and long enough (greater than the target mileage) will the system assume that a continuous and large amount of recovered energy will be generated, thus initiating preventative power adjustment.

[0077] In optional implementations, the specific method for obtaining the maximum allowable charging power of the power battery includes: Obtain the battery performance parameters of the target vehicle, including at least the battery state of charge, battery temperature, and battery health status. The maximum allowable charging power of the power battery is dynamically determined based on battery performance parameters.

[0078] In this embodiment, the State of Charge (SOC) of a battery refers to the percentage of its current remaining capacity relative to its rated capacity. It can be an estimated value obtained by combining the ampere-hour integration method (coulomb counting) with open-circuit voltage calibration, or it can be a state variable identified online by a battery model.

[0079] In this embodiment, battery temperature refers to the real-time temperature inside the power battery or a key cell. It can be the temperature measured by a thermistor (NTC) arranged on the surface of the battery module, or the highest or average temperature in the internal temperature distribution of the battery pack obtained by infrared thermal imaging technology.

[0080] In this embodiment, the State of Health (SOH) refers to the degree of degradation of the current maximum usable capacity of the power battery relative to its factory nominal capacity. It can be an estimate based on the increase in battery internal resistance, or it can be the capacity retention rate obtained through periodic deep charge-discharge cycle calibration.

[0081] In this embodiment, a specific method for dynamically determining the maximum allowable charging power of the power battery based on battery performance parameters can be as follows: a multidimensional lookup table (LUT) is pre-set in the BMS (Battery Management System). The dimensions of this table are SOC, temperature, and SOH, and each grid point stores the maximum safe charging power under the corresponding operating condition. The BMS collects the three parameters in real time and retrieves the current maximum allowable charging power from the table using an interpolation algorithm.

[0082] In this embodiment, another specific way to dynamically determine the maximum allowable charging power of the power battery based on battery performance parameters is to use an equivalent circuit model (ECM) based on electrochemical principles, with SOC, temperature, and SOH as model input parameters, and calculate the battery's terminal voltage, internal heat generation, and lithium deposition risk under different charging currents through online simulation, and take the power corresponding to the maximum current that does not violate any safety constraints (such as voltage limit, temperature rise rate) as the maximum allowable charging power.

[0083] In the above implementation process, the maximum allowable charging power of the power battery can be dynamically calculated based on the battery's remaining charge, battery temperature, and battery health status, thereby improving the accuracy of the calculation of the maximum allowable charging power of the power battery.

[0084] For example, the charging capacity of a power battery is affected by its internal state. In low-temperature environments, the ion migration rate inside the battery slows down. If high-power charging at room temperature is used, lithium deposition easily occurs on the negative electrode surface, leading to capacity loss and an increased risk of internal short circuits. As the battery ages (SOH decreases), its internal resistance increases, and the acceptable maximum charging current decreases accordingly. By acquiring the battery's state of charge (SOC), temperature, and state of health (SOH) in real time, and dynamically calculating the current maximum allowable charging power based on these parameters, the system automatically lowers this power threshold at low temperatures. In the high SOC range, the system also limits the charging power to prevent overcharging. For aged batteries, the system sets a lower safe charging power based on their degraded performance parameters. This dynamic adjustment mechanism ensures that the charging power input to the battery remains within its safe tolerance range under various operating conditions, improving the accuracy of calculating the maximum allowable charging power of the power battery. This avoids battery damage caused by overcharging, lithium deposition, or overheating, ensuring the safety of the charging process and the long-term cycle life of the battery.

[0085] Please see Figure 2 , Figure 2 This is a schematic diagram showing the result of a control device for a range extender generator provided in an embodiment of this application. For example... Figure 2 As shown, the device includes the following functional modules: The acquisition module 201 is used to acquire the total power generation capacity, maximum allowable charging power of the power battery, and driving conditions of the target vehicle. The control module 202 is used to control the current power generation of the range extender and / or the regenerative braking power of the drive motor of the target vehicle based on the total power generation of the target vehicle, the maximum allowable charging power of the power battery, and the driving conditions. Specifically, when the driving conditions are energy recovery conditions and the total power generation is greater than the maximum allowable charging power of the power battery, the control module 202 adjusts the current power generation of the range extender and / or the regenerative braking power of the drive motor so that the total power generation is less than or equal to the maximum allowable charging power of the power battery. The adjustment priority of the current power generation of the range extender is higher than the adjustment priority of the regenerative braking power of the drive motor.

[0086] In the above implementation process, under the condition of energy recovery and the total power generation is greater than the maximum allowable charging power of the power battery, the device can adjust the current power generation of the range extender first, rather than the power recovery power of the drive motor, based on the adjustment priority, thereby reducing the probability of braking performance degradation and energy waste caused by adjusting the power recovery power of the drive motor.

[0087] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. For example... Figure 3 As shown, the electronic device includes: Processor 301; and The memory 302 is configured to store machine-readable instructions that, when executed by the processor 301, perform a range extender power generation control method as described in any of the foregoing embodiments.

[0088] In the above implementation process, the electronic device can, under the condition of energy recovery and the total power generation is greater than the maximum allowable charging power of the power battery, prioritize adjusting the current power generation of the range extender rather than prioritizing the power recovery of the drive motor, thereby reducing the probability of braking performance degradation and energy waste caused by adjusting the power recovery of the drive motor.

[0089] This application also provides a storage medium storing a computer program, which is executed by a processor as a control method for range extender power generation as described in any of the foregoing embodiments.

[0090] During the above implementation process, when the storage medium is in the energy recovery condition and the total power generation is greater than the maximum allowable charging power of the power battery, based on the adjustment priority, the current power generation power of the range extender is preferentially adjusted rather than the recovery power of the drive motor, thereby reducing the probability of degradation of braking performance and energy waste caused by adjusting the recovery power of the drive motor.

[0091] Exemplarily, as a specific implementation manner, a control method for a range extender has the following implementation logic: Monitor the operating state of the range extender generator in real time to confirm whether it is in the power generation mode (i.e., the engine has been started and the generator is outputting electric energy), and at the same time determine whether the vehicle has entered the energy recovery state (such as triggering the regenerative braking condition by releasing the accelerator pedal and coasting or stepping on the brake pedal).

[0092] Further, obtain the expected recovery power P_rec of the current drive motor (calculated based on vehicle speed, deceleration, motor efficiency MAP, etc.); Further, obtain the real-time power generation power P_gen of the current range extender, and calculate the total vehicle power generation P_total = P_rec + P_gen.

[0093] Further, query the current maximum allowable charging power P_charge_max provided by the battery management system (BMS), which is dynamically determined by parameters such as battery SOC, temperature, and state of health SOH.

[0094] Further, if P_total ≤ P_charge_max, maintain the current power generation power and recovery power of the range extender unchanged and operate normally. If P_total > P_charge_max, execute the following priority adjustment strategy: Preferentially reduce the power generation power of the range extender so that the reduction amount ΔP = P_total – P_charge_max, and keep the regenerative braking recovery power P_rec unchanged to ensure braking performance and energy recovery efficiency. The target power generation power of the adjusted range extender is: P_gen_target = P_gen – ΔP.

[0095] Further, if the power of the range extender has dropped to the lowest operating threshold and still cannot meet the requirement, then gradually limit the recovery power.

[0096] Further, when the vehicle exits the energy recovery state or the recovery power naturally decreases (such as when the vehicle speed decreases), and the system detects that P_total < P_charge_max and the battery has a charging demand, automatically restore the power generation power of the range extender to the original set level or readjust it according to the energy management strategy.

[0097] Furthermore, this strategy is executed by the vehicle controller (VCU) or energy management unit (EMU), receiving real-time data from the BMS, MCU (motor controller), and GCU (generator controller). The control process can be embedded into existing control modules through software algorithms without the need for additional hardware.

[0098] Furthermore, a prediction algorithm is introduced to predict long downhill scenarios based on slope recognition and navigation information, and to reduce the power of the range extender in advance.

[0099] Furthermore, a power descent curve for the range extender is set to avoid driving vibration caused by sudden power changes.

[0100] Furthermore, a user notification mechanism has been added, which uses the instrument panel to remind users of "energy coordination in progress" when frequent adjustments are made.

[0101] This specific implementation method effectively prevents battery overcharging by real-time monitoring of the total power generation and the maximum allowable charging power of the power battery, and timely intervention when conflicts arise, ensuring the safety of the battery system. During power regulation, the power generation of the range extender is reduced first, rather than the regenerative braking power of the drive motor, thereby ensuring the performance and reliability of regenerative braking and improving the driving experience. This strategy maximizes the energy recovery capability under conditions such as downhill driving, helping to improve the energy utilization efficiency of the vehicle and extend the driving range. At the same time, by dynamically adjusting the output power of the range extender, drastic fluctuations in the power battery charge are avoided, maintaining a stable balance of the vehicle's energy flow. This solution requires no additional hardware and can be implemented only through software control logic optimization, offering advantages such as low cost and ease of mass production. Furthermore, this strategy enables collaborative management of the range extender and electric drive system in multi-source power generation scenarios, improving the intelligence level of the vehicle's energy management system and providing a technical foundation for higher-level energy efficiency optimization strategies.

[0102] It should be noted that, regarding the control entity, the above-described specific implementation methods can be executed not only by the vehicle control unit (VCU) but also by the engine management system (EMS) or a separate energy management module, and are not limited to a single controller architecture. Regarding the judgment criteria, for systems with relatively stable battery voltage, the "maximum allowable charging current" can be used instead of the "maximum allowable charging power" as the threshold criterion for power coordination. Regarding the adjustment method, in addition to using linearly decreasing range extender power adjustment, stepped power reduction can also be used, or the target power output can be achieved by coordinating the adjustment of engine speed and generator excitation current. Regarding the recovery mechanism, various recovery logics can be configured according to actual needs, including but not limited to automatic recovery after a set time delay, recovery triggered based on the battery SOC rising to a specific threshold, or recovery in response to the driver's selected driving mode. Furthermore, this strategy can be extended to unified scheduling by a cloud-based energy management platform, combining high-precision maps, traffic flow, and vehicle status information to issue coordination commands to the vehicle, achieving more forward-looking and efficient energy coordination control.

[0103] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and there may be other division methods in actual implementation. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interface; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0104] Furthermore, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0105] Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0106] It should be noted that if a function is implemented as a software module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0107] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0108] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A control method for generating electricity using a range extender, characterized in that, The method includes: Obtain the target vehicle's total power generation capacity, maximum allowable charging power of the power battery, and operating conditions; Based on the target vehicle's total power generation, the maximum allowable charging power of the power battery, and the driving condition control of the target vehicle's current power generation of the range extender and / or the regenerative braking power of the drive motor, wherein: When the driving condition is an energy recovery condition and the total power generation is greater than the maximum allowable charging power of the power battery, the current power generation of the range extender and / or the recovery power of the drive motor are adjusted so that the total power generation is less than or equal to the maximum allowable charging power of the power battery. The adjustment priority of the current power generation of the range extender is higher than the adjustment priority of the recovery power of the drive motor.

2. The method according to claim 1, characterized in that, Adjusting the current power generation of the range extender and / or the regenerative braking power of the drive motor to make the total power generation less than or equal to the maximum allowable charging power of the power battery includes: Reduce the current power generation of the range extender while keeping the power recovered by the drive motor constant; Obtain the lower limit of the range extender's power generation, and if the current power generation of the range extender has dropped to less than or equal to the lower limit of the range extender's power generation, determine whether the total power generation is greater than the maximum allowable charging power of the power battery. When the total power generation exceeds the maximum allowable charging power of the power battery, the power recovery power of the drive motor is reduced so that the total power generation is less than or equal to the maximum allowable charging power of the power battery.

3. The method according to claim 2, characterized in that, The reduction of the current power generation of the range extender includes: Obtain the power descent curve of the range extender; The range extender's current power generation is controlled to decrease based on the range extender's power reduction curve.

4. The method according to claim 1, characterized in that, The method of controlling the target vehicle's range extender's current power generation and / or drive motor's regenerative braking power based on the target vehicle's total power generation, maximum allowable charging power of the power battery, and driving conditions also includes: Under the condition that the driving condition exits the energy recovery condition or the power recovery of the drive motor naturally decreases, determine whether the total power generation is less than the maximum allowable charging power of the power battery; The charging status of the target vehicle is determined when the total power generation is less than the maximum allowable charging power of the power battery. Under the condition that the charging status indicates that the target vehicle has a charging demand, the current power generation of the range extender is increased.

5. The method according to claim 4, characterized in that, The method of controlling the target vehicle's range extender's current power generation and / or drive motor's regenerative braking power based on the target vehicle's total power generation, maximum allowable charging power of the power battery, and driving conditions also includes: Under the condition that the total power generation is less than the maximum allowable charging power of the power battery, the driving scenario data of the target vehicle is obtained; Based on the driving scenario data of the target vehicle, determine whether the total power generation power is greater than the maximum allowable charging power of the power battery at the next moment; If the total power generation is greater than the maximum allowable charging power of the power battery at the next moment, the adjustment of the current power generation of the range extender and / or the power recovery of the drive motor is performed at the current moment.

6. The method according to claim 5, characterized in that, The driving scenario data includes slope recognition data and navigation information; The step of determining whether the total power generation at the next moment is greater than the maximum allowable charging power of the power battery based on the driving scenario data of the target vehicle includes: Based on the slope recognition data and the navigation information, it is determined whether the total power generation power at the next moment is greater than the maximum allowable charging power of the power battery. Specifically, when the slope recognition data indicates that the driving slope of the target vehicle is greater than or equal to the target slope, and the navigation information indicates that the length of the forward driving path of the target vehicle is greater than or equal to the target mileage, it is determined that the total power generation power at the next moment is greater than the maximum allowable charging power of the power battery.

7. The method according to claim 1, characterized in that, The specific methods for obtaining the maximum allowable charging power of the power battery include: Obtain the battery performance parameters of the target vehicle, wherein the battery performance parameters include at least the battery state of charge, battery temperature, and battery health status; The maximum allowable charging power of the power battery is dynamically determined based on the battery performance parameters.

8. A control device for generating electricity using a range extender, characterized in that, The device includes: The acquisition module is used to acquire the target vehicle's total power generation, maximum allowable charging power of the power battery, and driving conditions. The control module is used to control the current power generation of the range extender and / or the regenerative braking power of the drive motor of the target vehicle based on the total power generation of the target vehicle, the maximum allowable charging power of the power battery, and the driving conditions, wherein: When the driving condition is an energy recovery condition and the total power generation is greater than the maximum allowable charging power of the power battery, the current power generation of the range extender and / or the recovery power of the drive motor are adjusted so that the total power generation is less than or equal to the maximum allowable charging power of the power battery. The adjustment priority of the current power generation of the range extender is higher than the adjustment priority of the recovery power of the drive motor.

9. An electronic device, characterized in that, include: processor; as well as A memory configured to store machine-readable instructions that, when executed by the processor, perform the control method for range extender power generation as described in any one of claims 1-7.

10. A storage medium, characterized in that, The storage medium stores a computer program, which is executed by a processor using the control method for range extender power generation as described in any one of claims 1-7.

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