Range extender power generation control method, device and vehicle for a hybrid vehicle

Abstract

The present invention discloses a power generation control method, device and vehicle for a range extender of a hybrid vehicle, relating to the technical field of hybrid vehicles. The power generation control method for the range extender of the hybrid vehicle includes the following steps: an acquisition step: acquiring the vehicle speed of the whole vehicle, the power demand of the whole vehicle and a first duration; a control step: if the vehicle speed of the whole vehicle is greater than or equal to a first preset vehicle speed value v1, the power demand of the whole vehicle is greater than or equal to a first preset power value p1 of the whole vehicle and the first duration is greater than a first preset time t1, then controlling the range extender to enter a power following mode; otherwise, controlling the range extender to enter a fixed-point power generation mode. The method provided by the present invention can solve the problem of frequent engine start, reduce fuel consumption and emissions, and provide good quietness.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid electric vehicles, and particularly to a power generation control method, device and vehicle for a range extender of a hybrid vehicle. Background Art

[0002] For a hybrid range-extended electric vehicle, since the engine is not directly involved in driving, it can be controlled more flexibly to meet the user's usage requirements. There are currently two technical solutions for the range extender. One is the series-parallel structure of BYD DMI and Honda IMMD, where the engine can be used as a power source for directly driving the whole vehicle and can also charge the power battery, and then drive the whole vehicle through the motor; the other is the series structure, where the engine only charges the power battery and drives the whole vehicle through the motor. There are currently two solutions for the series structure. One is as Figure 9 shown. In this solution, the power battery is a small battery and cannot provide too much energy. Therefore, during vehicle driving, the power battery needs to be charged frequently, and the engine starts frequently or changes the working point; the other solution is as Figure 10 shown. In this solution, the power battery is a large battery. In the control logic, the engine generates electricity and hardly enters the power battery, but directly drives the drive motor. During vehicle driving, the engine also starts frequently or changes the working point.

[0003] Both of the above two solutions for the series structure have the problems of frequent engine starts or frequent changes in the working point, resulting in higher fuel consumption and worse emissions of the system, and also unable to provide quietness during most driving processes. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a power generation control method, device and vehicle for a range extender of a hybrid vehicle, which solves the problems of frequent engine starts or changes in the working point, reduces fuel consumption and emissions, and provides good quietness.

[0005] To achieve the above-mentioned invention purposes, the technical solution of the present invention is as follows:

[0006] In the first aspect, the present invention provides a power generation control method for a range extender of a hybrid vehicle. The range extender includes an engine and a generator, and is characterized by including the following steps:

[0007] Obtaining step: obtaining the vehicle speed of the whole vehicle, the required power of the whole vehicle, and the first duration;

[0008] Control steps: If the vehicle speed is greater than or equal to the first preset vehicle speed value v1, the vehicle demand power is greater than or equal to the first preset vehicle power value p1 and the first duration is greater than the first preset time t1, then control the range extender to enter the power following mode, where the power following mode is: according to the state of charge Soc of the power battery, control the generator not to work or generate electricity at the vehicle demand power;

[0009] Otherwise, control the range extender to enter the fixed-point power generation mode, where the fixed-point power generation mode is: divide the state of charge Soc of the power battery into multiple different intervals, and according to the interval where the current state of charge Soc of the power battery is located, control the generator to generate electricity at different power generation powers, where the higher the current state of charge Soc of the power battery, the smaller the power generation power of the generator.

[0010] Further, the control steps further include: when the range extender enters the power following mode, if the vehicle speed is less than or equal to the second preset vehicle speed value v2, the vehicle demand power is less than or equal to the second preset vehicle power value p2 and the second duration is greater than the second preset time t2, control the range extender to enter the fixed-point power generation mode, where the second preset vehicle speed value is less than the first preset vehicle speed value and the second preset vehicle power value is less than the first preset vehicle power value.

[0011] Further, the power following mode includes:

[0012] Detect the state of charge Soc of the power battery;

[0013] If the state of charge Soc of the power battery is greater than or equal to the first battery charge preset value c1, control the generator not to work; otherwise, control the generator to work, and the power output by the generator is consistent with the vehicle demand power.

[0014] Further, the fixed-point power generation mode specifically includes:

[0015] Detect the state of charge Soc of the power battery;

[0016] If the state of charge Soc of the power battery is greater than or equal to the first threshold c12, control the range extender to enter the pure electric operation mode, where the pure electric operation mode is: the generator does not work;

[0017] If the state of charge (Soc) of the power battery is less than the first threshold c12 and greater than or equal to the second threshold c14, control the range extender to enter the power balance power generation mode. During the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the first sub-threshold c11, exit the power balance power generation mode and enter the pure electric operation mode. Wherein, the power balance power generation mode is: the generator generates electricity at a power generation power P11;

[0018] If the state of charge (Soc) of the power battery is less than the second threshold c14 and greater than or equal to the third threshold c16, control the range extender to enter the power compensation power generation mode. During the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the second sub-threshold c13, exit the power compensation power generation mode and enter the power balance power generation mode. Wherein, the power compensation power generation mode is: the generator generates electricity at a power generation power P12;

[0019] If the state of charge (Soc) of the power battery is less than the third threshold c16, control the range extender to enter the forced power generation mode. During the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the third sub-threshold c15, exit the forced power generation mode and enter the compensation power generation mode. Wherein, the forced power generation mode is: the generator generates electricity at a power generation power P13.

[0020] In a second aspect, the present invention also provides a range extender power generation control device for a hybrid vehicle. The range extender includes an engine and a generator, and is characterized by including the following modules:

[0021] An acquisition module: used to acquire the vehicle speed, the vehicle demand power, and the first duration;

[0022] A control module: used to control the range extender to enter the power following mode when the vehicle speed is greater than or equal to the first vehicle speed preset value v1, the vehicle demand power is greater than or equal to the first vehicle power preset value p1, and the first duration is greater than the first preset time t1. Wherein, the power following mode is: according to the state of charge (Soc) of the power battery, control the generator not to work or generate electricity at the vehicle demand power;

[0023] Otherwise, control the range extender to enter the fixed-point power generation mode. Wherein, the fixed-point power generation mode is: divide the state of charge (Soc) of the power battery into multiple different intervals, and according to the interval where the current state of charge (Soc) of the power battery is located, control the generator to generate electricity at different power generation powers. The higher the current state of charge (Soc) of the power battery, the smaller the power generation power of the generator, and the power generation power of the generator is less than the vehicle demand power.

[0024] Further, the control module is further configured to:

[0025] After the range extender enters the power following mode, if the vehicle speed is less than or equal to the second vehicle speed preset value v2, the vehicle demand power is less than or equal to the second vehicle power preset value p2 and the second duration is greater than the second preset time t2, control the range extender to enter the fixed-point power generation mode, where the second vehicle speed preset value is less than the first vehicle speed preset value, and the second vehicle power preset value is less than the first vehicle power preset value.

[0026] Further, after the control module controls the range extender to enter the power following mode, it includes:

[0027] Detect the state of charge Soc of the power battery;

[0028] When the state of charge Soc of the power battery is greater than or equal to the first battery charge preset value c1, control the generator not to work; otherwise, control the generator to work, and the power output by the generator is consistent with the vehicle demand power.

[0029] Further, after the control module controls the range extender to enter the fixed-point power generation mode, it includes:

[0030] Detect the state of charge Soc of the power battery;

[0031] When the state of charge Soc of the power battery is greater than or equal to the first threshold c12, control the range extender to enter the pure electric operation mode, where the pure electric operation mode is: the generator does not work;

[0032] When the state of charge Soc of the power battery is less than the first threshold c12 and greater than or equal to the second threshold c14, control the range extender to enter the power balance power generation mode, and during the power generation process of the generator, when the state of charge Soc of the power battery is greater than or equal to the first sub-threshold c11, exit the power balance power generation mode and enter the pure electric operation mode, where the power balance power generation mode is: the generator generates electricity at the power generation power P11;

[0033] When the state of charge Soc of the power battery is less than the second threshold c14 and greater than or equal to the third threshold c16, control the range extender to enter the power compensation power generation mode, and during the power generation process of the generator, when the state of charge Soc of the power battery is greater than or equal to the second sub-threshold c13, exit the power compensation power generation mode and enter the power balance power generation mode, where the power compensation power generation mode is: the generator generates electricity at the power generation power P12;

[0034] When the state of charge (Soc) of the power battery is less than the third threshold c16, control the range extender to enter the forced power generation mode. During the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the third sub-threshold c15, exit the forced power generation mode and enter the compensation power generation mode. Wherein, the forced power generation mode is: the generator generates power at a power generation power P13.

[0035] Wherein, the power generation powers P11, P12, and P13 increase in sequence, and the c11, c12, c13, c14, c15, and c16 decrease in sequence.

[0036] In a third aspect, the present invention further provides a range extender power generation control device for a hybrid vehicle, which is characterized by including: a memory and a controller, wherein:

[0037] The memory is used to store a computer program;

[0038] The controller is used to execute the computer program to implement the steps of the method provided in the first aspect.

[0039] In a fourth aspect, the present invention further provides a hybrid vehicle, which is characterized by including the device provided in the second aspect or the device provided in the third aspect.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The range extender power generation control method provided by the present invention controls the range extender to enter the power following mode or the fixed-point power generation mode according to the vehicle speed, the vehicle demand power, and the first duration. In the power following mode or the fixed-point power generation mode, the range extender is further controlled to adopt different power generation modes according to the state of charge (Soc) of the power battery, thereby solving the problem of frequent engine start or change of the working point, reducing fuel consumption and emissions, and providing good quietness. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a flowchart of an embodiment of a range extender power generation control method for a hybrid vehicle according to the present invention.

[0043] Figure 2 It is a structural schematic diagram of an embodiment of a range extender power generation control method for a hybrid vehicle according to the present invention.

[0044] Figure 3 It is a structural schematic diagram of a power system of an embodiment of a range extender power generation control method for a hybrid vehicle according to the present invention.

[0045] Figure 4 It is a flowchart of another embodiment of a range extender power generation control method for a hybrid vehicle according to the present invention.

[0046] Figure 5 This is a flowchart of an embodiment of the power following mode of the present invention.

[0047] Figure 6 This is a flowchart of an embodiment of the fixed-point power generation mode of the present invention.

[0048] Figure 7 is Figure 6 A graph of the relationship between the state of charge threshold of the power battery.

[0049] Figure 8 This is a structural block diagram of an embodiment of a power generation control device for a range extender of a hybrid vehicle according to the present invention.

[0050] Figure 9 This is a schematic diagram of the power supply structure of the small power battery in the background technology.

[0051] Figure 10 This is a schematic diagram of the power supply structure of the large power battery in the background technology. Detailed implementation manners

[0052] To describe in detail the technical content, achieved objectives and effects of the present invention, the following is described in conjunction with embodiments and with reference to the accompanying drawings. [[ID=3 | 1]]

[0053] " Example 1

[0054] As Figure 1 shown, a power generation control method for a range extender of a hybrid vehicle is characterized by including the following steps:

[0055] Obtaining step S10 ^ 1: Obtain the vehicle speed, vehicle demand power and first duration;

[0056] As Figure 2 shown, the range extender controller APU obtains the vehicle speed, vehicle demand power and first duration from the vehicle controller VCU through the CAN bus. The setting of these three values of the vehicle speed, vehicle demand power and first duration is to directly generate a power consistent with the vehicle demand when the vehicle speed is high and the power demand is high, reducing the loss of energy entering the power battery and then being released from the power battery. The time when the first duration starts to count is when both the vehicle speed and the vehicle demand power satisfy the set first vehicle speed preset value v1 and the first vehicle power preset value p1.

[0057] Control step S102: If the vehicle speed is greater than or equal to the first preset vehicle speed value v1, the vehicle demand power is greater than or equal to the first preset vehicle power value p1, and the first duration is greater than the first preset time t1, then control the range extender to enter the power following mode, where the power following mode is: according to the state of charge Soc of the power battery, control the generator not to work or generate electricity at the vehicle demand power;

[0058] Otherwise, control the range extender to enter the fixed-point power generation mode, where the fixed-point power generation mode is: divide the state of charge Soc of the power battery into multiple different intervals, and according to the interval where the current state of charge Soc of the power battery is located, the generator generates electricity at different power generation powers, where the higher the current state of charge Soc of the power battery, the smaller the power generation power of the generator.

[0059] As Figure 3 Described above, the vehicle power system includes a range extender, a drive motor, and a power battery. The range extender includes an engine and a generator. The range extender controller APU controls the power and speed of the generator in the range extender according to the vehicle speed, vehicle demand power, and the first duration. The generator is directly connected to the engine through a spline. Therefore, the power and speed of the engine are the same as those of the generator. Therefore, the range extender controller APU only needs to control the power and speed of the engine in the range extender to achieve the control of the power generation power of the generator.

[0060] If the vehicle speed is greater than or equal to the first preset vehicle speed value v1, the vehicle demand power is greater than or equal to the first preset vehicle power value p1, and the first duration is greater than the first preset time t1, then the range extender controller APU controls the range extender to enter the power following mode, where the power following mode is: according to the state of charge Soc of the power battery, control the generator not to work or generate electricity at the vehicle demand power; where the first preset vehicle speed value v1 is a relatively high speed, such as 90 km / h, the first preset vehicle power value p1 is also a relatively high power, such as 35 KW, and the first preset time t1 is a relatively high time, such as 5000 ms. In this way, in the case of high vehicle speed and high demand power, the power following mode is entered after a certain duration. When the state of charge Soc of the power battery is greater than or equal to the first battery charge preset value c1, control the generator not to work; otherwise, the generator works, and the power output by the generator is the same as the vehicle demand power. When the vehicle is driving at high speed and high power, the generator directly generates the same power as the vehicle demand, and the power is directly provided to the vehicle, reducing the loss of energy entering the power battery and then being released from the power battery, achieving the effect of saving energy consumption.

[0061] Otherwise, the range extender controller APU controls the range extender to enter the fixed-point power generation mode, where the fixed-point power generation mode is: dividing the state of charge (Soc) of the power battery into multiple different intervals, and according to the interval where the current state of charge (Soc) of the power battery is located, the generator generates electricity with different power generation powers. The higher the current state of charge (Soc) of the power battery, the smaller the power generation power of the generator. In the fixed-point power generation mode, the state of charge (Soc) of the power battery is divided into multiple different intervals. For example, (0, 100%] is evenly divided into 4 intervals, and three Soc switching threshold points are set in the middle. In the high state of charge (Soc) interval, the engine does not work. In each other state of charge (Soc) interval, the engine works at a fixed operating point, and these operating points are all points with high engine efficiency. This can avoid frequent switching of the engine operating points in the range extender, solve the problem of frequent engine start or change of operating points, reduce fuel consumption and emissions, and provide good quietness. It can also be divided according to actual situations, such as 5 or 3 intervals, etc.

[0062] In summary, the method provided by the present invention controls the range extender to enter the power following mode or the fixed-point power generation mode according to the vehicle speed, the vehicle demand power, and the first duration. In the power following mode or the fixed-point power generation mode, the range extender is further controlled to adopt different power generation modes according to the state of charge (Soc) of the power battery, thereby solving the problem of frequent engine start or change of operating points, reducing fuel consumption and emissions, and providing good quietness.

[0063] Further, as Figure 4 shown, the control step further includes: when the range extender enters the power following mode, if the vehicle speed is less than or equal to the second vehicle speed preset value v2, the vehicle demand power is less than or equal to the second vehicle power preset value p2 and the second duration is greater than the second preset time t2, control the range extender to enter the fixed-point power generation mode, where the second vehicle speed preset value is less than the first vehicle speed preset value, and the second vehicle power preset value is less than the first vehicle power preset value. In this way, when the range extender enters the power following mode, if the vehicle speed or power demand of the vehicle decreases, the range extender can enter the fixed-point power generation mode, and the engine can work at a fixed high-efficiency point, achieving the effect of fuel saving and emission reduction.

[0064] Specifically, as Figure 5 described, the power following mode includes:

[0065] Detecting the state of charge (Soc) of the power battery;

[0066] If the state of charge (Soc) of the power battery is greater than or equal to the first preset battery power value c1, control the generator not to work; otherwise, control the generator to work, and the power output by the generator is consistent with the vehicle's required power.

[0067] In this way, after entering the power following mode, the range extender continuously detects the state of charge (Soc) of the power battery, and controls the generator not to work or the power output to be consistent with the vehicle's required power. This ensures that when the battery power is sufficient, the battery power is preferentially used, and when the battery power is low, the engine is started to consume fuel, thus ensuring the economy of vehicle use.

[0068] Specifically, as Figure 6 shown, the fixed-point power generation mode specifically includes:

[0069] Detect the state of charge (Soc) of the power battery;

[0070] If the state of charge (Soc) of the power battery is greater than or equal to the first threshold c12, control the range extender to enter the pure electric operation mode, where the pure electric operation mode is: the generator does not work, and only the power battery provides energy. This ensures that when the battery power is sufficient, the battery power is preferentially used, thus ensuring the economy of vehicle use;

[0071] If the state of charge (Soc) of the power battery is less than the first threshold c12 and greater than or equal to the second threshold c14, control the range extender to enter the power balance power generation mode. During the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the first secondary threshold c11, exit the power balance power generation mode and enter the pure electric operation mode. The power balance power generation mode is: the generator generates electricity at the power generation power P11. This allows the engine to operate at a relatively low power when the battery power is slightly insufficient, which can not only ensure the NVH during driving but also maintain the battery power balance within a certain range;

[0072] If the state of charge (Soc) of the power battery is less than the second threshold c14 and greater than or equal to the third threshold c16, control the range extender to enter the power compensation power generation mode. During the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the second secondary threshold c13, exit the power compensation power generation mode and enter the power balance power generation mode. The power compensation power generation mode is: the generator generates electricity at the power generation power P12. This allows the engine to operate at a relatively high power point when the battery power is relatively low to compensate for the battery power;

[0073] If the state of charge (Soc) of the power battery is less than the third threshold value c16, control the range extender to enter the forced power generation mode. During the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the third sub-threshold value c15, exit the forced power generation mode and enter the compensation power generation mode. Among them, the forced power generation mode is that the generator generates power at the power generation power P13. This can make the engine operate at the maximum power point when the battery power is extremely lacking, and quickly charge the battery.

[0074] Among them, the power generation powers P11, P12, and P13 increase in sequence, and the c11, c12, c13, c14, c15, and c16 decrease in sequence, as Figure 7 shown.

[0075] Embodiment 2.

[0076] Based on Embodiment 1, as Figure 8 shown, the present invention provides a control device for power generation of a range extender of a hybrid vehicle. The range extender includes an engine and a generator, and includes the following modules:

[0077] An acquisition module: used to acquire the vehicle speed, the vehicle demand power, and the first duration;

[0078] A control module: used to control the range extender to enter the power following mode when the vehicle speed is greater than or equal to the first vehicle speed preset value v1, the vehicle demand power is greater than or equal to the first vehicle power preset value p1, and the first duration is greater than the first preset time t1. Among them, the power following mode is to control the generator not to work or generate power at the vehicle demand power according to the state of charge (Soc) of the power battery;

[0079] Otherwise, control the range extender to enter the fixed-point power generation mode. Among them, the fixed-point power generation mode is to divide the state of charge (Soc) of the power battery into multiple different intervals, and according to the interval where the current state of charge (Soc) of the power battery is located, the generator generates power at different power generation powers. Among them, the higher the current state of charge (Soc) of the power battery, the smaller the power generation power of the generator, and the power generation power of the generator is less than the vehicle demand power.

[0080] Its implementation principle and technical effects can be further referred to the relevant descriptions in Method Embodiment 1, and will not be elaborated here.

[0081] As a preferred solution, the control module is further used for:

[0082] After the range extender enters the power following mode, if the vehicle speed is less than or equal to the second vehicle speed preset value v2, the vehicle demand power is less than or equal to the second vehicle power preset value p2 and the second duration is greater than the second preset time t2, control the range extender to enter the fixed-point power generation mode, where the second vehicle speed preset value is less than the first vehicle speed preset value and the second vehicle power preset value is less than the first vehicle power preset value. To achieve the automatic switching from the power following mode to the fixed-point power generation mode, when the vehicle is driving at high speed and high power, the generator directly generates the power consistent with the vehicle demand, and the power is directly provided to the vehicle, reducing the loss of energy entering the power battery and then being released from the power battery. After the vehicle speed or power demand decreases, the range extender can enter the fixed-point power generation mode, and the engine can work at a fixed high-efficiency point, achieving the effect of fuel saving and emission reduction.

[0083] As a preferred solution, after the control module controls the range extender to enter the power following mode, it includes:

[0084] Detect the state of charge Soc of the power battery;

[0085] When the state of charge Soc of the power battery is greater than or equal to the first battery charge preset value c1, control the generator not to work; otherwise, control the generator to work, and the power output by the generator is consistent with the vehicle demand power. This can ensure that when the power battery has sufficient power, the power of the power battery is preferentially used, and when the power of the power battery is less, the engine is started to consume fuel, ensuring the economy of vehicle use.

[0086] As a preferred solution, after the control module controls the range extender to enter the fixed-point power generation mode, it includes:

[0087] Detect the state of charge Soc of the power battery;

[0088] When the state of charge Soc of the power battery is greater than or equal to the first threshold c12, control the range extender to enter the pure electric operation mode, where the pure electric operation mode is: the generator does not work, and only the power battery provides energy; [[ID=1⑨]]

[0089] When the state of charge Soc of the power battery is less than the first threshold c12 and greater than or equal to the second threshold c14, control the range extender to enter the power balance power generation mode, and during the power generation process of the generator, when the state of charge Soc of the power battery is greater than or equal to the first sub-threshold c11, exit the power balance power generation mode and enter the pure electric operation mode, where the power balance power generation mode is: the generator generates power at the power generation power P11;

[0090] When the state of charge (Soc) of the power battery is less than the second threshold c14 and greater than or equal to the third threshold c16, control the range extender to enter the power compensation power generation mode. During the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the second sub-threshold c13, exit the power compensation power generation mode and enter the power balance power generation mode. Wherein, the power compensation power generation mode is: the generator generates electricity at a power generation power P12;

[0091] When the state of charge (Soc) of the power battery is less than the third threshold c16, control the range extender to enter the forced power generation mode. During the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the third sub-threshold c15, exit the forced power generation mode and enter the compensation power generation mode. Wherein, the forced power generation mode is: the generator generates electricity at a power generation power P13.

[0092] Wherein, the power generation powers P11, P12, and P13 increase in sequence, and c11, c12, c13, c14, c15, c16 decrease in sequence. This can ensure that when the battery power is sufficient, the battery power is preferentially used, ensuring the economy of vehicle use. When the power battery power is slightly insufficient, the engine runs at a smaller power, which can not only ensure the NVH during driving but also maintain the power battery power balance in a certain range; when the power battery power is relatively low, the engine runs at a larger power point to compensate for the power battery power; when the power battery power is extremely insufficient, the engine runs at an extremely large power point to quickly charge the power battery.

[0093] Embodiment III

[0094] Based on Embodiment I, the present invention provides a range extender power generation control device for a hybrid vehicle, including: a memory and a controller, wherein:

[0095] The memory is used to store a computer program;

[0096] The controller is used to execute the computer program to implement the steps of the method as described in Embodiment I.

[0097] The range extender power generation control device provided in this embodiment can be used to execute the technical solutions of the method embodiment shown in Embodiment I. Its implementation principle and technical effects can be further referred to the relevant descriptions in Method Embodiment I, and will not be elaborated here.

[0098] Embodiment IV

[0099] Based on Embodiment 2 or Embodiment 3, the present invention provides a hybrid vehicle, including the range extender power generation control device of the hybrid vehicle as described in Embodiment 2, or the range extender power generation control device of the hybrid vehicle as described in Embodiment 3.

[0100] For the implementation principle and technical effects, reference can be further made to the relevant descriptions in Method Embodiment 1, which will not be elaborated here.

[0101] Although the present invention has been described in detail with specific implementation manners in the above text, on the basis of the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A power generation control method for a range extender of a hybrid vehicle, the range extender including an engine and a generator, characterized in that, Including the following steps: Obtaining step: Obtain the vehicle speed of the whole vehicle, the required power of the whole vehicle, and the first duration; Control step: If the vehicle speed of the whole vehicle is greater than or equal to the first preset vehicle speed value v1, the required power of the whole vehicle is greater than or equal to the first preset power value p1 of the whole vehicle, and the first duration is greater than the first preset time t1, then control the range extender to enter the power following mode, where the power following mode is: According to the state of charge Soc of the power battery, control the generator not to work or generate electricity at the required power of the whole vehicle; Otherwise, control the range extender to enter the fixed-point power generation mode, where the fixed-point power generation mode is: Divide the state of charge Soc of the power battery into multiple different intervals, and according to the interval where the current state of charge Soc of the power battery is located, control the generator to generate electricity at different power generation powers, where the higher the current state of charge Soc of the power battery, the smaller the power generation power of the generator; The control step further includes: After the range extender enters the power following mode, if the vehicle speed of the whole vehicle is less than or equal to the second preset vehicle speed value v2, the required power of the whole vehicle is less than or equal to the second preset power value p2 of the whole vehicle, and the second duration is greater than the second preset time t2, control the range extender to enter the fixed-point power generation mode, where the second preset vehicle speed value is less than the first preset vehicle speed value, and the second preset power value of the whole vehicle is less than the first preset power value of the whole vehicle.

2. The power generation control method of the range extender for a hybrid vehicle according to claim 1, wherein The power following mode includes: Detect the state of charge Soc of the power battery; If the state of charge Soc of the power battery is greater than or equal to the first preset battery charge value c1, control the generator not to work; Otherwise, control the generator to work, and the power output by the generator is the same as the required power of the whole vehicle.

3. The power generation control method of the range extender for a hybrid vehicle according to claim 1, characterized in that, The specific fixed-point power generation mode includes: detecting the state of charge (Soc) of the power battery; if the state of charge (Soc) of the power battery is greater than or equal to the first threshold c12, controlling the range extender to enter the pure electric operation mode, where the pure electric operation mode is that the generator does not work; if the state of charge (Soc) of the power battery is less than the first threshold c12 and greater than or equal to the second threshold c14, controlling the range extender to enter the power balance power generation mode, and during the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the first sub-threshold c11, exiting the power balance power generation mode and entering the pure electric operation mode, where the power balance power generation mode is that the generator generates electricity at the power generation power P11; if the state of charge (Soc) of the power battery is less than the second threshold c14 and greater than or equal to the third threshold c16, controlling the range extender to enter the power compensation power generation mode, and during the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the second sub-threshold c13, exiting the power compensation power generation mode and entering the power balance power generation mode, where the power compensation power generation mode is that the generator generates electricity at the power generation power P12; if the state of charge (Soc) of the power battery is less than the third threshold c16, controlling the range extender to enter the forced power generation mode, and during the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the third sub-threshold c15, exiting the forced power generation mode and entering the compensation power generation mode, where the forced power generation mode is that the generator generates electricity at the power generation power P13; where the power generation power P11, the power generation power P12, and the power generation power P13 increase in sequence, and the first sub-threshold c11, the first threshold c12, the second sub-threshold c13, the second threshold c14, the third sub-threshold c15, and the third threshold c16 decrease in sequence.

4. An extended-range generator power generation control device for a hybrid vehicle, the extended-range generator including an engine and a generator, characterized in that, It includes the following modules: Acquisition module: used to acquire the vehicle speed, vehicle demand power, and the first duration; Control module: when the vehicle speed is greater than or equal to the first vehicle speed preset value v1, the vehicle demand power is greater than or equal to the first vehicle power preset value p1, and the first duration is greater than the first preset time t1, control the range extender to enter the power following mode, where the power following mode is: according to the state of charge Soc of the power battery, control the generator not to work or generate electricity at the vehicle demand power; otherwise, control the range extender to enter the fixed-point power generation mode, where the fixed-point power generation mode is: divide the state of charge Soc of the power battery into multiple different intervals, according to the interval where the current state of charge Soc of the power battery is located, the generator generates electricity at different power levels, where the higher the current state of charge Soc of the power battery, the smaller the power generation power of the generator, and the power generation power of the generator is less than the vehicle demand power; the control module is further used for: after the range extender enters the power following mode, if the vehicle speed is less than or equal to the second vehicle speed preset value v2, the vehicle demand power is less than or equal to the second vehicle power preset value p2, and the second duration is greater than the second preset time t2, control the range extender to enter the fixed-point power generation mode, where the second vehicle speed preset value is less than the first vehicle speed preset value, and the second vehicle power preset value is less than the first vehicle power preset value.

5. The range extender power generation control device for a hybrid vehicle according to claim 4, wherein After the control module controls the range extender to enter the power following mode, it includes: detecting the state of charge Soc of the power battery; when the state of charge Soc of the power battery is greater than or equal to the first battery charge preset value c1, control the generator not to work; otherwise, control the generator to work, and the power output by the generator is consistent with the vehicle demand power.

6. The range extender power generation control device for a hybrid vehicle according to claim 4, wherein After the control module controls the range extender to enter the fixed-point power generation mode, it includes: detecting the state of charge (Soc) of the power battery; when the state of charge (Soc) of the power battery is greater than or equal to the first threshold c12, controlling the range extender to enter the pure electric operation mode, where the pure electric operation mode is: the generator does not work; when the state of charge (Soc) of the power battery is less than the first threshold c12 and greater than or equal to the second threshold c14, controlling the range extender to enter the power balance power generation mode, and during the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the first sub-threshold c11, exiting the power balance power generation mode and entering the pure electric operation mode, where the power balance power generation mode is: the generator generates electricity at a power generation power P11; when the state of charge (Soc) of the power battery is less than the second threshold c14 and greater than or equal to the third threshold c16, controlling the range extender to enter the power compensation power generation mode, and during the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the second sub-threshold c13, exiting the power compensation power generation mode and entering the power balance power generation mode, where the power compensation power generation mode is: the generator generates electricity at a power generation power P12; when the state of charge (Soc) of the power battery is less than the third threshold c16, controlling the range extender to enter the forced power generation mode, and during the power generation process of the generator, when the state of charge (Soc) of the power battery is greater than or equal to the third sub-threshold c15, exiting the forced power generation mode and entering the compensation power generation mode, where the forced power generation mode is: the generator generates electricity at a power generation power P13; where the power generation power P11, power generation power P12, and power generation power P13 increase in sequence, and the first sub-threshold c11, first threshold c12, second sub-threshold c13, second threshold c14, third sub-threshold c15, and third threshold c16 decrease in sequence.

7. An extended-range generator power generation control device for a hybrid vehicle, characterized in that Comprising: a memory and a controller, where: the memory is used to store a computer program; the controller is used to execute the computer program to implement the steps of the method according to any one of claims 1 to 3.

8. A hybrid vehicle, characterized in that, Comprising the range extender power generation control device of the hybrid vehicle according to any one of claims 4 - 6, or the range extender power generation control device of the hybrid vehicle according to claim 7.

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