Tandem power generation control method for extended-range light commercial vehicle

Abstract

The invention discloses a series power generation control method for an extended-range light commercial vehicle, and the method comprises the steps: 1, obtaining the driving information of a vehicle through a CAN bus, and estimating the mass of the vehicle through a recursive least square method with a forgetting factor; 2, grading the estimated vehicle according to the mass range; 3, selecting different power generation modes according to the identified quality grade, the current vehicle speed and the SOC of the battery; 4 series power generation modes are mainly divided into a fixed-point low gear, a fixed-point middle gear, a fixed-point high gear and a power following mode, the power generation power of an engine does not depend on the power requirement of a driver after mass recognition, and the power following mode is adopted for power generation only when the vehicle is in a high load and the electric quantity is too low; and 5, control is conducted according to the target working rotating speed and torque of the engine, the rotating speed of the engine is adjusted and controlled through PID, the rotating speed of the engine is adjusted through the torque of the generator, and therefore the economical performance of the vehicle can be improved, and the vehicle can work in an efficient area all the time.

Description

Technical Field

[0001] The present application relates to the technical field of range-extended light commercial vehicles, and particularly to a method for controlling series power generation of range-extended light commercial vehicles Background Art

[0002] Currently, traditional light commercial vehicles have relatively high fuel consumption and high vehicle usage costs, while the problem of short driving range of pure electric light commercial vehicles is difficult to be completely solved in a short time. Range-extended light commercial vehicles can not only reduce fuel consumption but also solve consumers' range anxiety. To improve the economic performance of range-extended light commercial vehicles, the rationality of the control method for series power generation is crucial

[0003] Reasonable engine start-stop control and the selection of series power generation operating points are one of the key factors determining the economic performance of range-extended light commercial vehicles. Due to the large range of load changes in commercial vehicles, it poses a great challenge to the energy management control of hybrid vehicles. Therefore, it is necessary to estimate the vehicle load, accurately control the power generation according to the size of the load, which can improve the rationality and accuracy of vehicle energy management control Summary of the Invention

[0004] In order to overcome the deficiencies of low load identification accuracy of existing commercial vehicles and low power generation efficiency of the range extender due to load changes, the present invention proposes a method for controlling series power generation of range-extended light commercial vehicles based on load identification. According to the driving information of the vehicle, the vehicle load is estimated by using the vehicle dynamics formula and the least square method with a forgetting factor, the vehicle load is classified, and the series power generation operating point is selected according to the load level, the SOC of the battery and the vehicle speed, so that the engine works at an efficient point for a long time, improves the system efficiency and effectively reduces fuel consumption. Since the engine operating point is relatively fixed and the rotational speed fluctuation is small, it can further improve the NVH performance of the whole vehicle

[0005] The technical solution adopted by the present invention to solve the technical problem is to propose a method for controlling series power generation of range-extended light commercial vehicles based on load identification, including the following steps

[0006] Step 1: Collect the basic parameters of the vehicle, including the drag coefficient, frontal area, rolling radius, rolling resistance coefficient, etc. And collect the driving parameter information of the vehicle in real time, obtain the current driving speed, wheel-end driving force, ramp angle calculated by the VCU and other signals from the CAN bus, and calculate the longitudinal acceleration a of the vehicle by differentiating the vehicle speed c . Calculate the acceleration method using the following formula

[0007]

[0008] Longitudinal acceleration a cAfter the above calculations, low-pass filtering is performed to obtain the filtered acceleration value. In the above formula, △t is 0.1s, v(k) is the vehicle speed at time k, with the unit of km / h;

[0009] Step 2: Based on the vehicle driving information data obtained in Step 1, the least squares method with a forgetting factor is used to estimate the vehicle mass; the forgetting factor is calibrated and adjusted according to the mass estimated at the previous moment. The model estimated by the recursive least squares method is:

[0010]

[0011] In the formula, F tw is the total vehicle driving force minus the air resistance, a eq is the equivalent acceleration, m is the total vehicle mass to be estimated, α is the slope angle, T tq is the torque output by the drive motor, f is the rolling resistance coefficient, C d is the air resistance coefficient, A is the vehicle frontal area, i0 is the reduction ratio of the vehicle rear axle, i g is the speed ratio corresponding to the gearbox, η t is the total efficiency of the vehicle driveline, r is the tire rolling radius, and v is the vehicle driving speed.

[0012] The recursive format of the least squares method is as follows

[0013]

[0014] K(k) = P(k - 1)a eq (k) × (λ(k) + a eq T (k)P(k - 1)a eq (k)) -1

[0015]

[0016] In the formula is the mass identified at time k - 1, is the mass identified at time k, λ(k) is the forgetting factor, K(k) is the gain coefficient, P(k) is the error covariance, λ(k) is the forgetting factor, and I is the identity matrix.

[0017] Step 3: Based on the total vehicle mass estimated in Step 2, the load is classified into levels. The curb weight of the vehicle when unloaded is 3300 kg. Therefore, when the estimated mass is less than 3500 kg, the vehicle load is low; when the estimated mass is greater than 3500 kg and less than 5500 kg, the vehicle is medium-loaded; when the estimated mass is greater than 5500 kg, the vehicle is high-loaded.

[0018] Step 4: The judgment of engine start and stop takes into account the vehicle load level, battery SOC, vehicle driving speed, and also takes into account the driver's required torque. When the accelerator pedal is greater than 80% for 2 s, it directly enters the range-extending mode. When the accelerator pedal is less than 80%, refer to the vehicle load level obtained in Step 3, and at the same time consider the vehicle speed and battery SOC to determine the vehicle's operating mode. The operating modes mainly include the EV mode and the range-extending mode. The range-extending operating mode is also the series power generation mode.

[0019] Step 5: Correct the actual SOC of the battery according to the load level. When the load is low, the SOC correction factor is 1.1. When the load is medium, the correction factor is 1. When the load is high, the battery correction factor is 0.9. Multiply the actual SOC of the battery by the correction factor to obtain the equivalent SOC of the battery.

[0020] When the equivalent SOC of the battery is lower than 18%, regardless of the vehicle speed and load conditions, the engine starts for a long time and the vehicle directly enters the range-extending mode.

[0021] When the equivalent SOC is between 18% and 40%, when the vehicle speed is higher than 40 km / h, the vehicle enters the range-extending mode. When the vehicle speed is lower than 30 km / h, the vehicle enters the EV mode. In other vehicle speed cases, it remains in the operating mode of the previous moment.

[0022] When the equivalent SOC is greater than 40% and the vehicle speed is less than 40 km / h, the vehicle is in the EV mode and the engine does not start. When the equivalent SOC is lower than 40% and the vehicle speed is higher than 50 km / h, the vehicle enters the range-extending mode and the engine starts. In other vehicle speed cases, it remains in the operating mode state of the previous moment.

[0023] Step 6: When it is determined to be the range-extending operating mode, further determine the engine operating point. The engine operating point is controlled in multiple gears according to the load level and the level of SOC.

[0024] When the vehicle has a low load, refer to the current SOC of the vehicle. If the SOC is greater than 40%, select the optimal power generation point 1, that is, generate power at a fixed low gear. When the vehicle has a low load and the SOC is less than 40%, select the optimal power generation point 2, that is, generate power at a fixed medium gear.

[0025] When the vehicle has a medium load, refer to the current SOC of the vehicle. If the SOC is greater than 40%, select the optimal power generation point 2, that is, generate power at a fixed medium gear. If the SOC is less than 40%, select the optimal power generation point 3, that is, generate power at a fixed high gear.

[0026] When the vehicle is under high load, if the SOC is greater than 40% and less than 60%, select the optimal power generation point 3, that is, perform power generation at a fixed high gear. If the SOC is greater than 60%, select the optimal power generation point 2, that is, perform power generation at a fixed medium gear. If the SOC is less than 40%, in order to prevent the SOC of the battery from dropping too fast, a series power generation method following the demand power is adopted. The demand power following means that the power required for the engine is calculated by dividing the drive demand power by the efficiency.

[0027] To prevent the power generation point from jumping back and forth, it is necessary to delay for 3 s to enter when transitioning from the current power generation level to another power generation level.

[0028] Step 7: Selection of power generation point 1. It is mainly based on the coupling of the universal characteristic data of the engine and the universal characteristic data of the ISG generator to calculate the optimal power generation point 1 with the highest efficiency.

[0029] The optimal power generation point 2 is the engine operating point with the highest efficiency that is 15 kw higher than the power generation point 1.

[0030] The optimal power generation point 3 is the engine operating point with the highest efficiency that is 15 kW higher than the power generation point 2.

[0031] The power generation method following the power is to obtain the power required for the engine by dividing the demand power at the vehicle wheel end by the transmission efficiency. The amount of power generation depends on the magnitude of the demand power at the wheel end and changes with the driver's accelerator pedal, but also considers the limitations of the vehicle NVH performance.

[0032] Compared with the existing technology, the beneficial effects of the present invention are reflected in:

[0033] 1. The series power generation control method for an extended-range light commercial vehicle based on load identification proposed by the present invention can accurately estimate the load of the vehicle, and then determine the start and stop of the engine and the selection of the operating point according to the battery SOC and vehicle speed. The formulation of a reasonable power generation strategy can greatly improve the working efficiency of the system. The determined regular series power generation strategy can not only improve the calculation efficiency but also has a high control robustness.

[0034] 2. Based on the identified vehicle load mass, the present invention has formulated three gears of engine power generation points, which can ensure that the engine operates at an efficient point. In the case of high load and low power, or in the case of extremely low power, the series power generation control of the whole vehicle is in the form of power following, which can not only ensure that the SOC of the battery is maintained within a reasonable range, prevent the phenomenon of overcharging and over-discharging of the battery, but also improve the service life of the battery. Description of the Drawings

[0035] Figure 1 It is a schematic diagram of the series power generation control process of the extended-range light commercial vehicle in the present invention;

[0036] Figure 2 It is the flow chart of the selection strategy for different power generation points in the series power generation of the present invention;

[0037] Figure 3 It is the engine universal data graph and the schematic diagram of the fixed-point power generation working point; Specific implementation mode

[0038] In this embodiment, a series power generation control method for an extended-range light commercial vehicle is applied to the energy management control of an extended-range light commercial vehicle. Specifically, this method can identify the load of the vehicle and formulate a reasonable engine power generation strategy, making the system work more efficiently and the control more robust. The control process is as follows Figure 1 shown. Specifically, it includes the following steps:

[0039] Step 1: By collecting the basic parameters of the vehicle, including the wind resistance coefficient, frontal area, rolling radius, rolling resistance coefficient, etc. And real-time collect the driving parameter information of the vehicle, obtain the current driving speed of the vehicle from the CAN bus, the driving force at the wheel end, the ramp angle calculated by the VCU, etc. By differentiating the vehicle speed, calculate the longitudinal acceleration a of the vehicle c . Calculate the longitudinal acceleration using the following formula.

[0040]

[0041] After the longitudinal acceleration is calculated as above, it is then subjected to low-pass filtering to obtain the filtered acceleration value. In the above formula, the time △t is 0.1s; v(k) is the vehicle speed at time k, with the unit of km / h.

[0042] Step 2: According to the vehicle driving information obtained in Step 1, estimate the mass of the vehicle using the least squares method with a forgetting factor; the model estimated by the recursive least squares method is as follows:

[0043]

[0044] In the formula, F tw is the force after subtracting the wind resistance from the driving force, a eq is the equivalent acceleration, m is the mass to be estimated, α is the slope angle value, T tq is the torque output by the drive motor, f is the rolling resistance coefficient, C d is the wind resistance coefficient, A is the frontal area of the vehicle, i0 is the reduction ratio of the vehicle rear axle, i g is the speed ratio corresponding to the gearbox, η t is the total efficiency of the vehicle driveline, r is the tire rolling radius, and v is the vehicle driving speed.

[0045] Use the recursive calculation of the least squares method.

[0046]

[0047] K(k) = P(k - 1)a eq (k)×(λ(k) + a eq T (k)P(k - 1)a eq (k)) -1

[0048]

[0049] where is the quality identified at time k - 1, is the quality identified at time k, λ(k) is the forgetting factor, K(k) is the gain coefficient, P(k) is the error covariance, and I is the identity matrix;

[0050] Step 3: Classify the vehicle load according to the estimated vehicle mass in Step 2. The curb weight of the vehicle when it is unloaded is 3300 kg. Therefore, when the estimated mass is less than 3500 kg, the vehicle load is low load; when the estimated mass is greater than 3500 kg and less than 5500 kg, the vehicle is medium load; when the estimated mass is greater than 5500 kg, it is high load;

[0051] Step 4: On the premise that the engine and battery have no faults, the judgment of the engine start and stop considers the vehicle load level, battery SOC, vehicle driving speed, and also takes into account the driver's required torque. When the accelerator pedal is greater than 80% for 2 s, it directly enters the range - extender mode. When the accelerator pedal is less than 80%, according to the load level obtained in Step 3, and referring to the vehicle speed and battery SOC size, the working mode of the whole vehicle is determined;

[0052] Step 5: Correct the actual SOC of the battery according to the vehicle load level. When it is low load, the correction coefficient is 1.1; when it is medium load, the correction coefficient is 1; when it is high load, the correction coefficient of the battery is 0.9. Multiply the actual SOC of the battery by the correction coefficient to obtain the equivalent SOC value of the battery;

[0053] When the equivalent SOC of the battery is lower than 18%, regardless of the vehicle speed and load conditions, the engine starts for a long time and the vehicle directly enters the hybrid range - extender mode;

[0054] When the equivalent SOC is between 18% and 40%, when the vehicle speed is higher than 40 km / h, the vehicle enters the range - extender mode; when the vehicle speed is lower than 30 km / h, the vehicle enters the EV mode; in other vehicle speed cases, it remains in the working mode of the previous moment;

[0055] When the equivalent SOC is greater than 40% and the vehicle speed is less than 40 km / h, the vehicle operates in the EV mode and the engine does not start. When the SOC is below 40% and the vehicle speed is higher than 50 km / h, the vehicle enters the range-extending mode and the engine starts. In other SOC and vehicle speed conditions, it remains in the working mode of the previous moment.

[0056] Step 6: When it is determined that the working mode of the vehicle is the range-extending mode, it is necessary to further determine the engine operating point, and the engine operating point is controlled in multiple gears according to the load level and the SOC.

[0057] When the vehicle is under low load, referring to the actual SOC of the battery, if the actual SOC is greater than 40%, select the optimal power generation point 1, that is, fixed-point low gear for power generation. When the vehicle is under low load and the actual SOC is less than 40%, select the optimal power generation point 2, that is, fixed-point medium gear for power generation.

[0058] When the vehicle is under medium load, referring to the actual SOC of the battery, if the SOC is greater than 40%, select the optimal power generation point 2, that is, fixed-point medium gear for power generation. If the SOC is less than 40%, select the optimal power generation point 3, that is, fixed-point high gear for power generation.

[0059] When the vehicle is under high load, if the SOC is greater than 40% and less than 60%, select the optimal power generation point 3, that is, fixed-point high gear for power generation. If the SOC is greater than 60%, select the optimal power generation point 2, that is, fixed-point medium gear for power generation. If the SOC is less than 40%, in order to prevent the SOC of the battery from dropping too fast, a series power generation method with power following is adopted.

[0060] To prevent the situation of the series power generation operating point jumping back and forth, after meeting the conditions for transitioning from the current power generation level to another power generation level, it is allowed to enter the next power generation level only after a delay of 3 s.

[0061] Step 7: The selection of power generation point 1 is mainly based on the coupling calculation of the engine's universal characteristic data and the ISG generator's universal characteristic data. Multiply the engine efficiency and the power generation efficiency, and search and calculate the optimal power generation 1 with the highest efficiency.

[0062] The optimal power generation point 2 is the engine operating point with the highest efficiency that is 15 kw higher than power generation point 1.

[0063] The optimal power generation point 3 is the engine operating point with the highest efficiency that is 15 kW higher than power generation point 2.

[0064] The power generation method with power following is to obtain the required power generation power of the engine by dividing the required power at the vehicle wheel end by the transmission efficiency. The amount of power generation depends on the size of the required power at the wheel end and changes with the change of the driver's accelerator pedal. At the same time, the limitation of the vehicle NVH performance is also considered.

[0065] Figure 2 Selection strategy for series power generation points under different vehicle loads and SOC, the steps are as follows:

[0066] Step 1: Obtain the grade information of the vehicle load according to the mass estimation module.

[0067] Step 2: Refer to the vehicle load grade, divide the load grade into high load, medium load, and low load;

[0068] Step 3: When the vehicle is at low load, refer to the actual SOC of the battery. Take 40% as the critical value for judging high and low SOC. If the battery SOC is greater than 40%, it can be regarded as high SOC. If it is lower than 40%, it is in the low SOC state.

[0069] If the actual SOC is greater than 40%, select the optimal power generation point 1, that is, fixed-point low gear for power generation. When the vehicle is at low load and the actual SOC is less than 40%, select the optimal power generation point 2, that is, fixed-point medium gear for power generation.

[0070] When the vehicle is at medium load, refer to the actual SOC of the battery. If the SOC is greater than 40%, select the optimal power generation point 2, that is, fixed-point medium gear for power generation. If the SOC is less than 40%, select the optimal power generation point 3, that is, fixed-point high gear for power generation.

[0071] When the vehicle is at high load, if the SOC is greater than 40% and less than 60%, select the optimal power generation point 3, that is, fixed-point high gear for power generation. If the SOC is greater than 60%, select the optimal power generation point 2, that is, fixed-point medium gear for power generation. If the SOC is less than 40%, in order to prevent the SOC of the battery from dropping too fast, adopt the series power generation method of power following.

[0072] Step 4: To prevent the situation of the series power generation point jumping back and forth, it is necessary to delay for 3s before allowing entry into the next power generation level after meeting the conditions for transitioning from the current power generation level to another power generation level.

[0073] Step 5: Judgment of fixed-point low gear power generation point. According to the engine universal characteristic data and the generator universal characteristic data, multiply the engine efficiency and the power generation efficiency to calculate three working points at the highest combined efficiency after coupling. The optimal working point 1 of the engine is (2654, 132), that is, fixed-point low gear. On the basis of the optimal working point 1, adding 15kW can obtain the optimal working point 2 (3500, 134), that is, fixed-point medium gear. On the basis of the optimal working point 2, adding 15kW can obtain the optimal working point 3 (4050, 153), that is, fixed-point high gear, as Figure 3 shown.

[0074] Step 6: When the current load is high and the SOC is low, the engine generates electricity in a way that the engine power generation follows the driver's demand power. The required power generation can be obtained by dividing the current driving demand power by the system transmission efficiency, and the target speed and torque of the engine are determined according to the demand power generation. The engine speed is controlled by PID regulation, and the torque of the generator is used to adjust the engine speed within the target speed range. In addition to meeting the driver's power demand, the generated power can also charge the battery with the remaining power to prevent the battery SOC from dropping too fast. The above applicable working conditions are normal temperature conditions, without considering the influence of battery temperature on the maximum allowable charging and discharging power of the battery.

Claims

1. A control method for series power generation of an extended-range light commercial vehicle, characterized in that, Including: Step 1: By collecting the basic parameters of the vehicle, including the drag coefficient, frontal area, rolling radius, rolling resistance coefficient, etc., and collecting the driving parameter information of the vehicle in real time, obtaining signals such as the current driving speed of the vehicle, wheel-end driving force, and ramp angle calculated by the VCU from the CAN bus, and calculating the longitudinal acceleration a of the vehicle by differentiating the vehicle speed. c , use the following formula to calculate the acceleration method: Longitudinal acceleration a c After the above calculations, low-pass filtering is performed to obtain the filtered acceleration value. In the above formula, △t is the time interval and v(k) is the vehicle speed at time k; Step 2: Based on the vehicle driving information data obtained in Step 1, use the least squares method with a forgetting factor to estimate the mass of the vehicle; calibrate and adjust the forgetting factor according to the mass estimated at the previous moment. The model estimated by the recursive least squares method is as follows: Among them, F tw is the vehicle driving force minus the aerodynamic drag, a eq is the equivalent acceleration, m is the vehicle mass to be estimated, α is the slope angle, T tq is the torque output by the drive motor, f is the rolling resistance coefficient, C d is the aerodynamic drag coefficient, A is the vehicle frontal area, i0 is the reduction ratio of the vehicle rear axle, i g is the gear ratio corresponding to the gearbox, η t is the total efficiency of the vehicle driveline, r is the tire rolling radius, v is the vehicle driving speed; The recursive format of the least squares method is as follows: K(k) = P(k - 1)a eq (k)×(λ(k) + a eq T (k)P(k - 1)a eq (k)) -1 where is the quality recognized at time k-1, is the quality recognized at time k, λ(k) is the forgetting factor at time k, K(k) is the gain coefficient at time k, P(k) is the error covariance at time k, a eq (k) is the equivalent acceleration at time k, and I is the identity matrix; Step 3: Classify the load according to the vehicle mass estimated in Step 2. The curb weight of the vehicle when unloaded is 3300 kg. When the estimated mass is less than 3500 kg, the vehicle load is low load; when the estimated mass is greater than 3500 kg and less than 5500 kg, the vehicle is medium load; when the estimated mass is greater than 5500 kg, it is high load; Step 4: The judgment of engine start and stop considers the vehicle load level, battery SOC, vehicle driving speed, and also takes into account the driver's required torque. When the accelerator pedal is greater than 80% for 2 seconds, it directly enters the range extender mode. When the accelerator pedal is less than 80%, refer to the vehicle load level obtained in Step 3, and at the same time consider the vehicle speed and battery SOC to determine the vehicle's working mode. The working modes mainly include EV mode and range extender mode. The range extender working mode is also the series power generation mode; Step 5: Correct the actual SOC of the battery according to the load level. When it is low load, the SOC correction coefficient is 1.1; when it is medium load, the correction coefficient is 1; when it is high load, the correction coefficient of the battery is 0.

9. Multiply the actual SOC of the battery by the correction coefficient to obtain the equivalent SOC of the battery; When the equivalent SOC of the battery is lower than 18%, regardless of the vehicle speed and load conditions, the engine starts for a long time and the vehicle directly enters the range extender mode; When the equivalent SOC is between 18% and 40%, when the vehicle speed is higher than 40 km / h, the vehicle enters the range extender mode; when the vehicle speed is lower than 30 km / h, the vehicle enters the EV mode; in other vehicle speed cases, it remains the working mode of the previous moment; When the equivalent SOC is greater than 40% and the vehicle speed is less than 40 km / h, the vehicle is in the EV mode and the engine does not start. When the equivalent SOC is lower than 40% and the vehicle speed is higher than 50 km / h, the vehicle enters the range extender mode and the engine starts. In other vehicle speed cases, it remains the working mode state of the previous moment; Step 6: When it is determined to be the range extender working mode, further determine the engine operating point. The engine operating point is controlled in multiple gears according to the load level and the level of SOC; When the vehicle is in low load, refer to the current SOC of the vehicle. If the SOC is greater than 40%, select the optimal power generation point 1, that is, perform power generation at a fixed low gear. When the vehicle is in low load and the SOC is less than 40%, select the optimal power generation point 2, that is, perform power generation at a fixed medium gear; When the vehicle is in medium load, refer to the current SOC of the vehicle. If the SOC is greater than 40%, select the optimal power generation point 2, that is, perform power generation at a fixed medium gear. If the SOC is less than 40%, select the optimal power generation point 3, that is, perform power generation at a fixed high gear; When the vehicle is under high load, if the SOC is greater than 40% and less than 60%, select the optimal power generation point 3, that is, perform power generation at a fixed high gear. If the SOC is greater than 60%, select the optimal power generation point 2, that is, perform power generation at a fixed medium gear. If the SOC is less than 40%, in order to prevent the SOC of the battery from dropping too fast, adopt a series power generation method following the demand power. The demand power following means that the power generation power required by the engine is obtained by dividing the driving demand power by the efficiency; to prevent the power generation point from jumping back and forth, delay for 3 seconds to enter when transitioning from the current power generation level to another power generation level; Step 7: Selection of the power generation point 1 is mainly based on the coupling of the universal characteristic data of the engine and the universal characteristic data of the ISG generator to calculate the optimal power generation point 1 with the highest efficiency; The optimal power generation point 2 is the engine operating point with the highest efficiency that is 15 kw higher than the power generation point 1; The optimal power generation point 3 is the engine operating point with the highest efficiency that is 15 kW higher than the power generation point 2; The power generation method following the power is to obtain the power generation power required by the engine by dividing the demand power at the vehicle wheel end by the transmission efficiency. The amount of power generation depends on the magnitude of the demand power at the wheel end, and the power generation power changes with the change of the driver's accelerator pedal, while considering the limitation of the vehicle NVH performance.

2. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, it realizes the steps of the series power generation control method for the range-extended light commercial vehicle described in claim 1.

3. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it realizes the steps of the series power generation control method for the range-extended light commercial vehicle described in claim 1.

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