TWI716701B - Hybrid vehicle and its power generation control method of hybrid vehicle and device and computer readable storage medium - Google Patents

Abstract

The invention discloses a hybrid vehicle and its power generation control method and device, the control method includes the following steps: Get the gradient, throttle depth and power consumption of hybrid vehicles; determine the target power consumption level of the hybrid vehicle; obtain the SOC value and SOC balance point of the hybrid vehicle's power battery to determine the power generation demand level of the hybrid vehicle; obtain the maximum allowable power generation of the secondary motor of the hybrid vehicle, and in the best economic region the engine is preset the power generation output power and the allowable charge power of the power battery determine the power generation capability level of the hybrid vehicle; the final power generation level of the hybrid vehicle is determined according to the target power consumption level, the power generation demand level, and the power generation capability level, and based on the final generation level controls the power generation of the hybrid vehicle. In this way, the power generation control combined with the use of electricity can be realized to improve the overall vehicle protection capability and enhance the user experience.

Description

Hybrid electric vehicle and its power generation control method and device, and computer readable storage media

The present invention relates to the field of automobile technology, in particular to a power generation control method of a hybrid electric vehicle, a computer-readable storage medium, a power generation control device of a hybrid electric vehicle, and a hybrid electric vehicle.

In the electricity consumption strategy of the related hybrid power system, the vehicle speed-power curve is usually checked according to the current vehicle speed, and then multiplied by the first coefficient obtained according to the SOC (State Of Charge) value, and then multiplied by the current SOC and SOC The second coefficient obtained by the difference of the balance point is finally limited by the power generation capacity of the vehicle to obtain the power generation.

However, the problem with the related technology is that it is not comprehensive enough to generate electricity according to the actual situation, and it is easy to cause the power protection capacity of the vehicle to decline. For example, in the summer, when traffic jams on a ramp for a long time, the air conditioner consumes a lot of electricity at this time, and it is prone to electricity. The rapid decline has led to a decline in the ability of the vehicle to maintain electricity and affects the user experience.

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the first object of the present invention is to provide a power generation control method for a hybrid electric vehicle, which can enhance the power retention capability.

The second objective of the present invention is to provide a computer-readable storage medium.

The third object of the present invention is to provide a power generation control device for a hybrid electric vehicle.

The fourth object of the present invention is to provide a hybrid electric vehicle.

In order to achieve the above objective, a hybrid electric vehicle power generation control method proposed by an embodiment of the first aspect of the present invention includes the following steps: obtaining the gradient, throttle depth, and power of the electric device of the hybrid electric vehicle, and according to the gradient, the throttle The depth and the power of the electric device determine the target power consumption level of the hybrid electric vehicle; obtain the SOC value and SOC balance point of the power battery of the hybrid electric vehicle, and determine the hybrid power according to the SOC value and SOC balance point of the power battery The power generation demand level of the vehicle; obtain the maximum allowable generating power of the auxiliary motor of the hybrid electric vehicle, the generating output power of the engine in the preset optimal economic area and the allowable charging power of the power battery, and according to the maximum allowable power of the auxiliary motor The allowable power generation, the generation output power of the engine in the preset optimal economic zone and the allowable charging power of the power battery determine the power generation capacity level of the hybrid electric vehicle; according to the target power consumption level, the power generation demand level and the power generation The capability level determines the final power generation level of the hybrid electric vehicle, and controls the power generation of the hybrid electric vehicle according to the final power generation level.

According to the power generation control method of the hybrid electric vehicle proposed by the embodiment of the present invention, the target use of the hybrid electric vehicle is determined according to the gradient, the throttle depth and the power of the electric device by obtaining the gradient of the hybrid electric vehicle, the depth of the throttle, and the power of the electric device. Electricity level, obtain the SOC value and SOC balance point of the power battery of the hybrid electric vehicle, determine the power generation demand level of the hybrid electric vehicle according to the SOC value and SOC balance point of the power battery, and then obtain the maximum allowable power generation of the auxiliary motor of the hybrid electric vehicle , And according to the maximum allowable power generation of the auxiliary motor, the generation output power of the engine in the preset optimal economic area and the allowable charging power of the power battery to determine the power generation capacity level of the hybrid electric vehicle, according to the target power level and power generation demand level And the power generation capacity level determine the final power generation level of the hybrid electric vehicle, and control the power generation of the hybrid electric vehicle according to the final power generation level. Therefore, the power generation control method of the hybrid electric vehicle according to the embodiment of the present invention can be adjusted according to the gradient and oil of the hybrid electric vehicle. The depth of the door, the power of the electrical device, the SOC value of the power battery, the SOC balance point, the maximum allowable power generation of the auxiliary motor, the generation output power of the engine in the preset optimal economic zone and the allowable charging power of the power battery determine the power generation Level, so that the judgment conditions are more comprehensive, and the power generation can be comprehensively judged based on the power state of the vehicle, the user's power state and the power generation capacity, etc., and realize the power generation control combined with the power consumption situation, improve the power protection capability of the vehicle, and enhance the user experience.

To achieve the above objective, an embodiment of the second aspect of the present invention provides a computer-readable storage medium having instructions stored therein, and when the instructions are executed, the hybrid electric vehicle executes the power generation control method.

According to the computer-readable storage medium proposed in the embodiment of the present invention, by executing the instructions of the hybrid electric vehicle power generation control method, the power generation power can be comprehensively judged according to the power state of the vehicle, the user power state and the power generation capacity, etc., to achieve power generation control Combining with the electricity consumption situation, improve the power protection capability of the whole vehicle and enhance the user experience.

In order to achieve the above objective, a power generation control device for a hybrid electric vehicle provided by an embodiment of the third aspect of the present invention includes a controller and a memory. The memory stores a plurality of instructions, and the instructions are suitable for being loaded and loaded by the controller. Execution: Obtain the gradient, throttle depth and power of the electric device of the hybrid electric vehicle, and determine the target power consumption level of the hybrid electric vehicle according to the gradient, the throttle depth and the power of the electric device; obtain the hybrid electric vehicle's power The SOC value and SOC balance point of the power battery are used to determine the power generation demand level of the hybrid electric vehicle according to the SOC value and SOC balance point of the power battery; the maximum allowable power generation of the auxiliary motor of the hybrid electric vehicle is obtained, and the engine is at the preset The generation output power in the optimal economic area and the allowable charging power of the power battery are based on the maximum allowable generation power of the auxiliary motor, the generation output power of the engine in the preset optimal area and the allowable charging power of the power battery Determine the power generation capacity level of the hybrid electric vehicle; and determine the final power generation level of the hybrid electric vehicle according to the target power consumption level, the power generation demand level, and the power generation capacity level, and the power generation of the hybrid electric vehicle according to the final power generation level Take control.

According to the power generation control device of a hybrid electric vehicle proposed by an embodiment of the present invention, the target use of the hybrid electric vehicle is determined according to the gradient, the throttle depth, and the power of the electric device by obtaining the gradient, throttle depth, and power of the electric device of the hybrid electric vehicle. Electricity level; obtain the SOC value and SOC balance point of the power battery of the hybrid electric vehicle, and determine the power generation demand level of the hybrid electric vehicle according to the SOC value and SOC balance point of the power battery; obtain the maximum allowable power generation of the auxiliary motor of the hybrid electric vehicle, The generator output power of the engine in the preset optimal economic zone and the allowable charging power of the power battery are based on the maximum allowable generator power of the auxiliary motor, the generator output power of the engine in the preset optimal zone and the allowable power battery The charging power determines the power generation capacity level of the hybrid electric vehicle; and determines the final power generation level of the hybrid electric vehicle according to the target power consumption level, the power generation demand level and the power generation capacity level, and controls the power generation of the hybrid electric vehicle according to the final power generation level. Therefore, the power generation control device of the hybrid electric vehicle according to the embodiment of the present invention can be based on the gradient of the hybrid electric vehicle, the depth of the throttle, the power of the electric device, the SOC value of the power battery, the SOC balance point, the maximum allowable power generation of the auxiliary motor, The power generation output power of the engine in the preset optimal economic zone and the allowable charging power of the power battery determine the power generation level, so that the judgment conditions are more comprehensive, and it can be comprehensively judged according to the power state of the vehicle, the user power state, and the power generation capacity. Generating power, realizing power generation control combined with electricity consumption, improving the ability of the entire vehicle to maintain electricity, and improving user experience.

To achieve the above objective, the hybrid electric vehicle proposed by the embodiment of the fourth aspect of the present invention includes the power generation control device of the hybrid electric vehicle as described above.

According to the hybrid electric vehicle of the embodiment of the present invention, the power generation control device of the hybrid electric vehicle can comprehensively determine the power generation according to the power state of the vehicle, the user's power consumption state and the power generation capacity, etc., and realize the power generation control combined with the power consumption situation to improve The vehicle’s power-guarantee capability improves user experience.

1: Engine

2: Power motor

3: Power battery

4: DC-DC converter

5: auxiliary motor

6: Clutch

7: Wheel

10: The first electrical device

20: Low-voltage battery

21: second controller

30: The second electrical device

51: first controller

71: a pair of front wheels

72: A pair of rear wheels

90: Transmission

91: first transmission

92: second transmission

100: Power generation control device for hybrid electric vehicles

300: memory

400: instruction

500: Controller

1000: Hybrid car

DC1: The first DC terminal

DC2: second DC terminal

DC3: Third DC terminal

DC4: Fourth DC terminal

Figure 1 is a schematic block diagram of a hybrid electric vehicle according to an embodiment of the present invention; Figure 2a is a structural schematic diagram of a power system of a hybrid electric vehicle according to an embodiment of the present invention; Figure 2b is another diagram according to the present invention A schematic structural diagram of a power system of a hybrid electric vehicle according to an embodiment; Figure 3 is a block diagram of a power system of a hybrid electric vehicle according to another embodiment of the present invention; Figure 4 is a schematic diagram of a hybrid electric vehicle according to an embodiment of the present invention A flowchart of a power generation control method; Figure 5 is a flowchart of a hybrid electric vehicle according to an embodiment of the present invention to determine a target power consumption level; Figure 6 is a flowchart of a hybrid electric vehicle according to an embodiment of the present invention to determine a power generation demand level; Figure 7 is a flow chart of determining the power generation capacity level of a hybrid electric vehicle according to an embodiment of the present invention; Figure 8 is a flow chart of determining the final power generation power of a hybrid electric vehicle according to an embodiment of the present invention; A schematic block diagram of a power generation control device for a hybrid electric vehicle of the example; and FIG. 10 is a block diagram of a hybrid electric vehicle according to an embodiment of the present invention.

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

The power generation control method of the hybrid electric vehicle, the power system of the hybrid electric vehicle, and the hybrid electric vehicle according to the embodiments of the present invention are described below with reference to the accompanying drawings.

According to the embodiments shown in FIGS. 1 to 3, the power system 200 of the hybrid vehicle includes: an engine 1, a power motor 2, a power battery 3, a DC-DC converter 4, and an auxiliary motor 5.

As shown in FIGS. 1 to 3, the engine 1 outputs power to the wheels 7 of the hybrid vehicle through the clutch 6; the power motor 2 is used to output driving force to the wheels 7 of the hybrid vehicle. In other words, the power system of the embodiment of the present invention can provide power for the normal running of the hybrid vehicle through the engine 1 and/or the power motor 2. In some embodiments of the present invention, the power source of the power system 200 may be the engine 1 and the power motor 2, that is to say, any one of the engine 1 and the power motor 2 can independently output power to the wheels 7, or the engine 1 The power motor 2 can output power to the wheels 7 at the same time.

The power battery 3 is used to supply power to the power motor 2; the auxiliary motor 5 is connected to the engine 1, for example, the auxiliary motor 5 can be connected to the engine 1 through the wheel train end of the engine 1. The auxiliary motor 5 is respectively connected to the power motor 2, the DC-DC converter 4 and the power battery 3. When the auxiliary motor 5 generates power under the drive of the engine 1, it can charge the power battery 3, supply power to the power motor 2, and supply DC- At least one of the DC converter 4 supplies power. In other words, the engine 1 can drive the auxiliary motor 5 to generate electricity, and the electric energy generated by the auxiliary motor 5 can be provided to at least one of the power battery 3, the power motor 2 and the DC-DC converter 4. It should be understood that the engine 1 can drive the auxiliary motor 5 to generate electricity while outputting power to the wheels 7, or it can drive the auxiliary motor 5 to generate electricity alone.

As a result, the power motor 2 and the auxiliary motor 5 respectively act as a drive motor and a generator. Since the auxiliary motor 5 has high power generation and power generation efficiency at low speeds, it can meet the electricity demand for low-speed driving and maintain the low speed of the vehicle. Electric balance maintains low-speed ride comfort of the vehicle and improves the dynamic performance of the vehicle.

In some embodiments, the auxiliary motor 5 may be a BSG (Belt-driven Starter Generator, belt-driven starter/generator integrated motor) motor. It should be noted that the auxiliary motor 5 is a high-voltage motor. For example, the power generation voltage of the auxiliary motor 5 is equivalent to the voltage of the power battery 3, so that the electric energy generated by the auxiliary motor 5 can directly charge the power battery 3 without voltage conversion. The power motor 2 and/or the DC-DC converter 4 are directly supplied with power. In addition, the auxiliary motor 5 is also a high-efficiency generator. For example, the auxiliary motor 5 can be driven to generate electricity at the idling speed of the engine 1 to achieve a power generation efficiency of over 97%.

In addition, in some embodiments of the present invention, the auxiliary motor 5 can be used to start the engine 1, that is, the auxiliary motor 5 can have the function of starting the engine 1. For example, when the engine 1 is started, the auxiliary motor 5 can drive the crankshaft of the engine 1 to rotate. , So that the piston of the engine 1 reaches the ignition position, so as to start the engine 1, so that the auxiliary motor 5 can realize the function of the starter in the related art.

As mentioned above, both the engine 1 and the power motor 2 can be used to drive the wheels 7 of a hybrid vehicle. For example, as shown in Figure 2a, the engine 1 and the power motor 2 jointly drive the same wheel of a hybrid vehicle, such as a pair of front wheels 71 (including the left front wheel and the right front wheel); another example, as shown in Figure 2b, the engine 1 can be Drive the first wheel of the hybrid vehicle, such as a pair of front wheels 71 (including the left front wheel and the right front wheel), and the power motor 2 can drive power to the second wheel of the hybrid vehicle, such as a pair of rear wheels 72 (including the left rear wheel and the right rear wheel). wheel).

In other words, when the engine 1 and the power motor 2 drive a pair of front wheels 71 together, the driving force of the power system 200 is output to a pair of front wheels 71, and the whole vehicle can adopt a two-wheel drive mode; when the engine 1 drives a pair of front wheels 71 and When the power motor 2 drives the pair of rear wheels 72, the driving force of the power system 200 is output to the pair of front wheels 71 and the pair of rear wheels 72 respectively, and the entire vehicle can adopt a four-wheel drive mode.

Further, when the engine 1 and the power motor 2 drive the same wheel together, as shown in Figure 2a, the power system 200 of the hybrid vehicle further includes a final drive 8 and a transmission 90, wherein the engine 1 passes through the clutch 6, the transmission 90 And the final drive 8 outputs power to the first wheels of the hybrid vehicle, such as a pair of front wheels 71, and the power motor 2 outputs driving force to the first wheels of the hybrid vehicle through the final drive 8 such as a pair of front wheels 71. Among them, the clutch 6 and the transmission 90 can be integrated.

When the engine 1 drives the first wheel and the power motor 2 drives the second wheel, as shown in Figure 2b, the power system 200 of the hybrid vehicle further includes a first transmission 91 and a second transmission 92, Among them, the engine 1 outputs power to the first wheel of the hybrid vehicle through the clutch 6 and the first transmission 91, such as a pair of front wheels 71, and the power motor 2 outputs driving force to the second wheel of the hybrid vehicle through the second transmission 92, for example, a 72 to the rear wheel. Among them, the clutch 6 and the first transmission 91 can be integrated.

Further, in some embodiments of the present invention, as shown in Figures 1 to 3, the auxiliary motor 5 further includes a first controller 51, the power motor 2 further includes a second controller 21, and the auxiliary motor 5 passes through the A controller 51 is connected to the power battery 3 and the DC-DC converter 4 respectively, and is connected to the power motor 2 through the first controller 51 and the second controller 21.

Specifically, the first controller 51 is respectively connected to the second controller 21, the power battery 3, and the DC-DC converter 4. The first controller 51 may have an AC-DC conversion unit, and the auxiliary motor 5 may generate alternating current when generating electricity. , The AC-DC conversion unit can convert the alternating current generated by the high-voltage motor 2 into high-voltage direct current, such as 600V high-voltage direct current, to achieve at least one of charging the power battery 3, powering the power motor 2, and powering the DC-DC converter 4. .

Similarly, the second controller 21 may have a DC-AC conversion unit, the first controller 51 may convert the AC power generated by the auxiliary motor 5 into high-voltage DC power, and the DC-AC conversion unit may convert the first controller 51 into The high-voltage direct current is converted into alternating current to supply power to the power motor 2.

In other words, as shown in FIG. 3, when the auxiliary motor 5 is generating power, the auxiliary motor 5 can charge the power battery 3 and/or supply power to the DC-DC converter 4 through the first controller 51. In addition, the auxiliary motor 5 can also supply power to the power motor 2 through the first controller 51 and the second controller 21.

Further, as shown in FIGS. 1 to 3, the DC-DC converter 4 is also connected to the power battery 3. The DC-DC converter 4 is also connected to the power motor 2 through the second controller 21.

In some embodiments, as shown in Figure 3, the first controller 51 has a first DC terminal DC1, the second controller 21 has a second DC terminal DC2, and the DC-DC converter 4 has a third DC terminal DC3. , The third DC terminal DC3 of the DC-DC converter 4 can be connected to the first DC terminal DC1 of the first controller 51, so as to perform DC-DC on the high-voltage direct current output from the first controller 51 through the first DC terminal DC1. DC conversion. and Moreover, the third DC terminal DC3 of the DC-DC converter 4 can also be connected to the power battery 3, and the first DC terminal DC1 of the first controller 51 can be connected to the power battery 3 so that the first controller 51 can pass through The first DC terminal DC1 outputs high-voltage DC power to the power battery 3 to charge the power battery 3. Further, the third DC terminal DC3 of the DC-DC converter 4 may also be connected to the second DC terminal DC2 of the second controller 21, and the first DC terminal DC1 of the first controller 51 may be connected to the second controller The second DC terminal DC2 of 21 is connected, so that the first controller 51 outputs high-voltage DC power to the second controller 21 through the first DC terminal DC1 to supply power to the power motor 2.

Further, as shown in Figure 3, the DC-DC converter 4 is also connected to the first electrical device 10 and the low-voltage battery 20 in the hybrid vehicle to supply power to the first electrical device 10 and the low-voltage battery 20, and the low-voltage battery 20 is also connected to the first electrical device 10.

In some embodiments, as shown in Figure 3, the DC-DC converter 4 further has a fourth DC terminal DC4, and the DC-DC converter 4 can pass the high-voltage direct current output from the power battery 3 and/or the auxiliary motor 5 through the first The high-voltage DC power output by a controller 51 is converted into low-voltage DC power, and the low-voltage DC power is output through the fourth DC terminal DC4. Further, the fourth DC terminal DC4 of the DC-DC converter 4 can be connected to the first electrical device 10 to supply power to the first electrical device 10, where the first electrical device 10 can be a low-voltage electrical device, including but not Limited to car lights, radios, etc. The fourth DC terminal DC4 of the DC-DC converter 4 can also be connected to the low-voltage battery 20 to charge the low-voltage battery 20.

In addition, the low-voltage battery 20 is connected to the first electrical device 10 to supply power to the first electrical device 10. In particular, when the auxiliary motor 5 stops generating power and the power battery 3 fails or has insufficient power, the low-voltage battery 20 can be the first electrical device 10 Power supply, so as to ensure the low-voltage power consumption of the whole vehicle, to ensure that the whole vehicle can be driven in pure fuel mode, which helps to meet the user's driving range requirements for the whole vehicle.

As above, the third DC terminal DC3 of the DC-DC converter 4 is connected to the first controller 51, and the fourth DC terminal DC4 of the DC-DC converter 4 is connected to the first electrical device 10 and the low-voltage battery 20 respectively. 2. When the second controller 21 and the power battery 3 fail, the auxiliary motor 5 can enter It generates electricity to supply power to the first electrical device 10 and/or charge the low-voltage battery 20 through the first controller 51 and the DC-DC converter 4, so that the hybrid vehicle runs in a fuel-only mode.

In other words, when the power motor 2, the second controller 21, and the power battery 3 fail, the first controller 51 can convert the alternating current generated by the auxiliary motor 5 into high-voltage direct current, and the DC-DC converter 4 can control the first The high-voltage DC power converted by the device 51 is converted into low-voltage DC power to supply power to the first electrical device 10 and/or to charge the low-voltage battery 20.

Therefore, the auxiliary motor 5 and the DC-DC converter 4 have a separate power supply channel. When the power motor 2, the second controller 21 and the power battery 3 fail, electric drive cannot be realized. At this time, the auxiliary motor 5 and the DC -The separate power supply channel of the DC converter 4 can ensure low-voltage power consumption of the entire vehicle, ensure that the entire vehicle can be driven in pure fuel mode, and help meet the user's mileage requirements for the entire vehicle.

In further combination with the embodiment in FIG. 3, the first controller 51, the second controller 21 and the power battery 3 are respectively connected to the second electrical device 30 in the hybrid vehicle.

In some embodiments, as shown in Figure 3, the first DC terminal DC1 of the first controller 51 can be connected to the second electrical device 30. When the auxiliary motor 5 is generating power, the auxiliary motor 5 can be controlled by the first The device 51 directly supplies power to the second electrical device 30. In other words, the AC-DC conversion unit of the first controller 51 can also convert the AC power generated by the auxiliary motor 5 into high-voltage DC power, and directly supply power to the second electrical device 30.

Similarly, the power battery 3 can also be connected to the second electrical device 30 to supply power to the second electrical device 30. In other words, the high-voltage DC power output by the power battery 3 can be directly supplied to the second electrical device 30.

Wherein, the second electrical device 30 may be a high-voltage electrical device, which may include, but is not limited to, an air conditioner compressor, a PTC (Positive Temperature Coefficient, positive temperature coefficient) heater, etc.

As above, the auxiliary motor 5 generates electricity to charge the power battery 3, or power the power motor 2, or power the first electrical device 10 and the second electrical device 30. And, the power battery 3 The power motor 2 can be powered by the second controller 21 or the second electrical device 30 can be powered, and the first electrical device 10 and/or the low-voltage battery 20 can also be powered by the DC-DC converter 4. This enriches the power supply mode of the whole vehicle, meets the power demand of the whole vehicle under different working conditions, and improves the performance of the whole vehicle.

It should be noted that, in the embodiment of the present invention, low voltage may refer to a voltage of 12V (volt) or 24V, and high voltage may refer to a voltage of 600V, but is not limited thereto.

Therefore, in the power system of the hybrid electric vehicle according to the embodiment of the present invention, the engine is not involved in driving at low speed, and the clutch is not used, thereby reducing clutch wear or slipping, reducing frustration, improving comfort, and At low speeds, the engine can be operated in an economic area, only generating electricity without driving, reducing fuel consumption, reducing engine noise, maintaining low-speed electric balance and low-speed smoothness of the vehicle, and improving vehicle performance. Moreover, the auxiliary motor can directly charge the power battery, and can also supply power to low-voltage devices such as low-voltage batteries, first electrical devices, etc., and can also be used as a starter.

Based on the structure of the power system of the hybrid electric vehicle, the embodiment of the present invention also proposes a power generation control method of the hybrid electric vehicle.

As shown in Figure 4, the power generation control method of a hybrid electric vehicle according to an embodiment of the present invention includes the following steps:

S1: Obtain the gradient, throttle depth and power consumption of the hybrid electric vehicle, and determine the target power consumption level of the hybrid electric vehicle according to the gradient, throttle depth, and power consumption of the electric device.

It should be noted that the slope is the ratio of the vertical height of the slope to the horizontal length, the accelerator depth is the depth at which the accelerator pedal is depressed, and the current working power of the electrical device is the total power of all electrical devices. Among them, the electrical device may be a low-voltage electrical device, such as an air conditioner, a radio, and the like.

S2: Obtain the SOC value and SOC balance point of the power battery of the hybrid electric vehicle, and determine the power generation demand level of the hybrid electric vehicle according to the SOC value and SOC balance point of the power battery.

Among them, the SOC balance point can be a target SOC value set by the user. Even if the SOC value of the power battery is kept as close to the SOC balance point as possible, when the SOC value of the power battery is lower than the SOC balance point, the power battery can be charged.

S3: Obtain the maximum allowable generating power of the auxiliary motor of the hybrid electric vehicle, the generating output power of the engine in the preset optimal economic area, and the allowable charging power of the power battery, and according to the maximum allowable generating power of the auxiliary motor and the engine in advance The power generation output power in the optimal economic area and the allowable charging power of the power battery determine the power generation capacity level of the hybrid electric vehicle.

Among them, the power generation output power of the engine in the preset optimal economic zone may refer to the output power that the engine can use for power generation after meeting the driving demand and operating in the economic zone.

In a specific embodiment of the present invention, the target power consumption level can be divided into three power consumption levels, namely the maximum power consumption level, the standard power consumption level, and the economic power consumption level. Similarly, the power generation demand level and power generation capacity are also It can be divided into three levels, namely, the power generation demand level can be divided into the maximum power generation demand level, the standard power generation demand level and the economic power generation demand level, and the power generation capacity level can be divided into the maximum power generation capacity level, the standard power generation capacity level and the economic power generation capacity level.

S4: Determine the final power generation level of the hybrid electric vehicle according to the target power consumption level, power generation demand level and power generation capacity level, and control the power generation of the hybrid electric vehicle according to the final power generation level.

Therefore, the power generation control method of the hybrid electric vehicle according to the embodiment of the present invention can be based on the gradient of the hybrid electric vehicle, the throttle depth, the power of the electric device, the SOC value of the power battery, the SOC balance point, and the maximum allowable power generation of the auxiliary motor. , The power generation output power of the engine in the preset optimal economic area and the allowable charging power of the power battery determine the power generation level, so that the judgment conditions are more comprehensive, which can be integrated according to the power state of the vehicle, the user power state and the power generation capacity. Judgment of power generation can be determined based on the sum of the target power consumption level, power generation demand level and power generation capacity level of the hybrid electric vehicle Power generation level, thus realizing power generation control combined with power consumption, improving the power protection capability of the vehicle, and enhancing user experience.

According to an embodiment of the present invention, determining the target power consumption level of the hybrid electric vehicle according to the gradient, the throttle depth, and the power of the electric device includes: obtaining the gradient interval to which the gradient belongs, and obtaining the gradient target corresponding to the gradient interval to which the gradient belongs. Electric level; get the throttle depth range to which the throttle depth belongs, and get the throttle depth target power consumption level corresponding to the throttle depth range to which the throttle depth belongs; get the power range to which the power of the electric device belongs, and get the power of the electric device The power target power consumption level corresponding to the power range; the highest level among the slope target power level, the throttle depth target power level, and the power target power level is the target power level.

Among them, the slope is positively correlated with the target power consumption level of the slope, that is, the higher the target power consumption level of the slope, the higher the slope in the corresponding slope interval, and the throttle depth is positively correlated with the target power consumption level of the throttle depth, that is, The higher the target power consumption level of the throttle depth, the higher the throttle depth in the corresponding throttle depth range, and the power of the electric device is positively correlated with the target power consumption level. In other words, the higher the target power consumption level, the corresponding power The working power of the electric devices in the interval is higher.

Specifically, each of the gradient, throttle depth, and power consumption of the hybrid electric vehicle can be divided into three sections, and the three sections can correspond to the maximum power consumption level, the standard power consumption level, and the economic power consumption. Grade, that is, the three slope intervals correspond to the maximum power consumption grade of the slope, the standard power consumption grade of the slope and the economic power consumption grade of the slope; the three throttle depth ranges correspond to the maximum power consumption grade of the throttle depth, the standard power consumption grade of the throttle depth, and the throttle depth. Economic power consumption level; the three power ranges respectively correspond to the maximum power consumption level, power standard power consumption level and power economic power consumption level. Among them, the maximum power consumption level is higher than the standard power consumption level, and the standard power consumption level is higher than the economic power consumption level.

Determining the grade of power consumption according to the gradient may include: the gradient of the hybrid vehicle can be divided into the first gradient interval, the second gradient interval and the third gradient interval. The first gradient interval is greater than A1%, and the second gradient interval is greater than or equal to A2. % And less than or equal to A1%, and the third slope interval is greater than 0 and less than A2%. Among them, when the slope is greater than A1%, it is judged that the slope belongs to the first slope interval, and the power consumption level corresponding to the first slope interval is the maximum power consumption level; when the slope is greater than A2% and less than or equal to A1%, the slope belongs to the second slope In the interval, the slope electricity consumption grade corresponding to the second gradient interval is the standard electricity consumption grade. When the slope is greater than 0 and less than or equal to A2%, the slope belongs to the third gradient interval, and the slope electricity consumption grade corresponding to the third gradient interval is the economic electricity consumption grade. , Where A1>A2>0.

Determining the power level of the throttle depth according to the throttle depth can include: the throttle depth of the hybrid electric vehicle can be divided into the first depth range, the second depth range and the third depth range. The first depth range is greater than B1%, and the second depth range Is greater than B2% and less than or equal to B1%, and the third depth interval is greater than 0 and less than or equal to B2%. Among them, when the throttle depth is greater than B1%, it is judged that the throttle depth belongs to the first throttle depth range, and the throttle depth target power consumption level corresponding to the first throttle depth range is the maximum power consumption level; when the throttle depth is greater than B2% and less than or equal to B1% , It is judged that the throttle depth belongs to the second throttle depth range, and the target power consumption level of the throttle depth corresponding to the second throttle depth range is the standard power consumption level; when the throttle depth is greater than 0 and less than or equal to B2%, it is judged that the throttle depth belongs to the third throttle depth range , The target power consumption level of the throttle depth corresponding to the third throttle depth interval is the economic power consumption level, where B1>B2>0.

Determining the power consumption level according to the working power of the electric device may include: the working power of the electric device of the hybrid electric vehicle can be divided into a first power interval, a second power interval, and a third power interval, and the first power interval is greater than C1kw, the second power interval is greater than or equal to C2kw and less than or equal to C1kw, and the third power interval is less than C2kw. Among them, when the working power of the electric device is greater than C1kw, it is determined that the working power belongs to the first power interval, and the power target power consumption level corresponding to the first power interval is the maximum power consumption level; when the working power is greater than or equal to C2kw and less than or equal to C1kw, Determine that the working power belongs to the second power interval, and the power target power consumption level corresponding to the second power interval is the standard power consumption level; when the working power is less than C2kw, determine that the working power belongs to the third power interval, and the power target corresponding to the third power interval The power consumption level is the economic power consumption level, where C1>C2>0.

Further, after separately determining the grade power level, throttle depth power level, and power power level based on the slope, throttle depth, and current working power of the electrical device, the maximum power level, standard power level, and economic The current power consumption level is judged in the descending order of priority of the power consumption level, and the highest level among the power consumption level of the slope, the power consumption level of the throttle depth, and the power consumption level can be regarded as the power consumption level.

In other words, if any one of the grade power level, the throttle depth power level, and the power power level is the maximum power level, the power level is the maximum power level, if there is no maximum power level , And there is at least one standard electricity consumption grade, the electricity consumption grade is the standard electricity consumption grade. If there is neither the maximum electricity consumption nor the standard electricity consumption grade, and there is only one economic electricity consumption grade, the electricity consumption grade is economic electricity consumption grade.

According to a specific embodiment of the present invention, as shown in FIG. 5, the hybrid electric vehicle of the embodiment of the present invention determines the target power consumption level including the following steps:

S101: The system is powered on, the slope, the throttle depth, and the power of the powered device are obtained, and step S102, step S109, and step S116 are executed respectively.

S102: Determine whether the slope value is greater than A1%.

If yes, go to step S103; if not, go to step S104.

S103: Determine the slope target power consumption level as the maximum power consumption level, and execute step S123.

S104: Determine whether the slope value is greater than A2%.

If yes, go to step S105; if no, go to step S106.

S105: Determine the slope target power consumption level as the standard power consumption level, and execute step S123.

S106: Determine whether the slope value is greater than 0.

If yes, go to step S107; if not, go to step S108.

S107: Determine the slope target power consumption level as the economic power consumption level, and execute step S123.

S108: It is determined that there is no electricity demand for the gradient of the hybrid electric vehicle, and step S123 is executed.

S109: Determine whether the throttle depth is greater than B1%.

If yes, go to step S110; if not, go to step S111.

S110: Determine the target power consumption level of the throttle depth as the maximum power consumption level, and execute step S123.

S111: Determine whether the throttle depth is greater than B2%.

If yes, go to step S112; if not, go to step S113.

S112: Determine the target power consumption level of the throttle depth as the standard power consumption level, and execute step S123.

S113: Determine whether the throttle depth is greater than 0.

If yes, go to step S114; if no, go to step S115.

S114: Determine the target power consumption level of the throttle depth as the economic power consumption level, and execute step S123.

S115: It is determined that there is no electricity demand for the hybrid electric vehicle's throttle depth, and step S123 is executed.

S116: Determine whether the working power of the electrical device is greater than C1kw.

If yes, go to step S117; if not, go to step S118.

S117: Determine the power target power consumption level as the maximum power consumption level, and execute step S123.

S118: Determine whether the working power of the electrical device is greater than C2kw.

If yes, go to step S119; if not, go to step S120.

S119: Determine the power target power consumption level as the standard power consumption level, and execute step S123

S120: Determine whether the working power of the electrical device is greater than C3kw.

If yes, go to step S121; if not, go to step S122.

S121: Determine the power target power consumption level as the economic power consumption level, and execute step S123.

S122: Determine that the electric device of the hybrid electric vehicle has no electricity demand, and execute step S123.

S123: Set the highest level among the slope target power level, the throttle depth target power level, and the power target power level as the target power level.

According to an embodiment of the present invention, determining the power generation demand level of the hybrid electric vehicle according to the SOC value of the power battery and the SOC balance point includes: obtaining the SOC value range to which the SOC value of the power battery belongs, and obtaining the SOC value range to which the SOC value belongs The corresponding first generation demand level; obtain the difference between the SOC balance point of the power battery and the SOC value, obtain the difference interval to which the difference belongs, and obtain the second generation demand level corresponding to the difference interval to which the difference belongs; The highest level of the first power generation demand level and the second power generation demand level is used as the power generation demand level.

Among them, the SOC value of the power battery is positively correlated with the first power generation demand level, that is, the higher the first power generation demand level, the higher the SOC value in the SOC value range of the corresponding power battery, and the SOC balance point of the power battery is The difference in the SOC value is positively correlated with the second power generation demand level, that is, the higher the second power generation demand level, the higher the difference in the corresponding difference interval.

Specifically, the SOC value and difference of the power battery can be divided into three intervals, the three intervals correspond to the maximum power generation demand level, the standard power generation demand level, and the economic power generation demand level, that is, the three power battery SOC value intervals correspond to Maximum power generation demand level, standard power generation demand level and economic power generation demand level. The three difference intervals correspond to the maximum power generation demand level, standard power generation demand level and economic power generation demand level. Among them, the maximum power generation demand level is higher than the standard power generation demand level. The standard power generation demand level is higher than the economic power level.

Determining the first power generation demand level according to the SOC value of the power battery may include: dividing the SOC value of the power battery into a first SOC value interval, a second SOC value interval and a third SOC value, the first SOC value interval being greater than s2 % And less than or equal to s3%, the second SOC value interval is greater than s1% and less than or equal to s2%, and the third SOC value interval is less than or equal to s1%. Among them, when the SOC value of the power battery is greater than s2% and less than or equal to s3%, it is determined that the SOC value of the power battery belongs to the first SOC value interval, and the first power generation demand level is the economic power generation demand level. When the SOC value of the power battery is greater than s1% and less than or equal to s2%, then judge The SOC value of the off-power battery belongs to the second SOC value range, and the first power generation demand level is the standard power generation demand level. When the SOC value of the power battery is less than or equal to s1%, it is determined that the SOC value of the power battery belongs to the third SOC value range. The first power generation demand level is the maximum power generation demand level, where s1<s2<s3.

Determining the second power generation demand level according to the difference between the SOC balance point of the power battery and the SOC value may include: obtaining the difference by subtracting the SOC value from the SOC balance point of the power battery, and the difference may be divided into the first difference interval and the first difference interval. The second difference interval and the third difference interval, the first difference interval is greater than or equal to n1%, the second difference interval is greater than or equal to n2% and less than n1%, and the third difference interval is greater than or equal to n3% and less than n2%. Among them, when the difference is greater than or equal to n1%, the difference is determined to belong to the first difference interval, and the second generation demand level is the maximum generation demand level. When the difference is greater than or equal to n2% and less than n1%, the difference is determined It belongs to the second difference interval, and the second power generation demand level is the standard power generation demand. When the difference is greater than or equal to n3% and less than n2%, the difference is judged to belong to the third difference interval, and the second power generation demand level is the economic power generation demand , Where n1>n2>n3.

Further, after the first power generation demand level and the second power generation demand level are separately determined according to the SOC value and the difference of the power battery, the priority order of the maximum power generation demand level, the standard power generation demand level, and the economic power generation demand level can be in descending order After determining the power generation demand level, the highest level of the first power generation demand level and the second power generation demand level can be used as the power generation demand level.

According to a specific embodiment of the present invention, as shown in Fig. 6, the hybrid electric vehicle of the embodiment of the present invention determines the power generation demand level including the following steps:

S201: Obtain the SOC value of the power battery, and execute step S202 and step S209 respectively.

S202: Determine whether the SOC value of the power battery is greater than s2% and less than or equal to s3%.

If yes, go to step S203; if not, go to step S204.

S203: Determine that the first power generation demand level is the maximum power generation demand level, and execute step S217.

S204: Determine whether the SOC value of the power battery is greater than s1% and less than or equal to s2%.

If yes, go to step S205; if not, go to step S206.

S205: Determine the first power generation demand level as the standard power generation demand level, and execute step S217.

S206: Determine whether the SOC value of the power battery is less than or equal to s1%.

If yes, go to step S207; if not, go to step S208.

S207: Determine that the first power generation demand level is the economic power generation demand level, and execute step S217.

S208: Determine that the first power generation demand is no demand, and execute step S217.

S209: Calculate the difference according to the SOC balance point and the SOC value of the power battery.

S210: Determine whether the difference is greater than or equal to n1%.

If yes, go to step S211; if not, go to step S212.

S211: Determine that the second power generation demand level is the maximum power generation demand level, and execute step S217.

S212: Determine whether the difference is greater than or equal to n2% and less than n1%.

If yes, go to step S213; if not, go to step S214.

S213: Determine the second power generation demand level as the standard power generation demand level, and execute step S217.

S214: Determine whether the difference is greater than or equal to n3% and less than n2%.

If yes, go to step S215; if not, go to step S216.

S215: Determine the second power generation demand level as the economic power generation demand level, and execute step S217.

S216: Determine that the second power generation demand is no demand, and execute step S217.

S217: Determine whether the first power generation demand level is greater than the second power generation demand level. Among them, the maximum power generation demand level is greater than the standard power generation demand level, and the standard power generation demand level is greater than the economic power generation demand level.

If yes, go to step S218; if not, go to step S219.

S218: Determine the first power generation demand level as the power generation demand level.

S219: Determine the second power generation demand level as the power generation demand level.

According to an embodiment of the present invention, the power generation capacity level of the hybrid electric vehicle is determined according to the maximum allowable power generation of the auxiliary motor, the generation output power of the engine in the preset optimal economic zone, and the allowable charging power of the power battery, including: obtaining The maximum allowable generating power of the auxiliary motor belongs to the allowable generating power range, and obtaining the auxiliary motor generating capacity level corresponding to the allowable generating power range of the maximum allowable generating power of the auxiliary motor; obtaining the power generation of the engine in the preset optimal economic area The generating output power range to which the output power belongs, and obtaining the engine generating capacity level corresponding to the generating output power range of the generating output power of the engine in the preset optimal economic zone; obtaining the allowable charging power to which the allowable charging power of the power battery belongs Obtain the power battery generating capacity level corresponding to the allowable charging power range to which the allowable charging power of the power battery belongs; the lowest level of the auxiliary motor generating capacity level, the engine generating capacity level and the power battery generating capacity level is regarded as the generating capacity level.

Among them, the maximum allowable power generation of the auxiliary motor is positively correlated with the power generation capacity of the auxiliary motor, that is to say, the higher the power generation capacity of the auxiliary motor, the higher the maximum allowable power generation of the corresponding auxiliary motor, and the engine is in the preset optimal economy The power generation output in the region is positively related to the engine power generation capacity level, that is, the higher the engine power generation capacity level, the higher the power generation output power of the corresponding engine in the preset optimal economic region, and the allowable charging power of the power battery It is positively correlated with the power battery generating capacity level, that is, the higher the power battery generating capacity, the higher the allowable charging power of the corresponding power battery.

Specifically, each of the maximum allowable power generation of the auxiliary motor, the generation output power of the engine in the preset optimal economic zone, and the allowable charging power of the power battery can be divided into three sections, and the three sections can correspond to each Maximum power generation capacity level, standard power generation capacity level and economic power generation capacity level, that is, the maximum allowable power generation power range of the three auxiliary motors corresponds to the maximum power generation capacity level, standard power generation capacity level and economic power generation capacity level. The three engines are preset The power generation output power range in the best economic area corresponds to the maximum power generation capacity level, the standard power generation capacity level and the economic power generation capacity level. The allowable charging power ranges of the three power batteries correspond to the maximum power generation capacity level, standard power generation capacity level and economic power generation respectively. Ability level. Among them, the maximum power generation capacity level is higher than the standard power generation capacity level, and the standard power generation capacity level is greater than the economic power generation capacity level. Specifically, the interval critical value corresponding to the maximum power generation capacity level is P1KW, and the interval critical value corresponding to the standard power generation capacity level is P2KW. The interval critical value corresponding to the economic power generation capacity level is P3KW, where P1>P2>P3.

Specifically, determining the power generation capacity level of the auxiliary motor according to the maximum allowable power generation of the auxiliary motor includes: when the maximum allowable power generation power of the auxiliary motor is greater than or equal to P1KW, determining that the power generation capacity level of the auxiliary motor is the maximum power generation capacity level, when the auxiliary motor When the maximum allowable generating power is greater than or equal to P2KW and less than P1KW, the generating capacity of the auxiliary motor is judged to be the standard generating capacity level. When the maximum allowable generating power of the auxiliary motor is greater than or equal to P3KW and less than P2KW, the generating capacity of the auxiliary motor is judged It is the level of economic power generation capacity.

Determining the power generation capacity level of the engine according to the power generation output power of the engine in the preset optimal area includes: when the power generation output power of the engine is greater than or equal to P1KW, the power generation capacity level of the engine is judged to be the maximum power generation capacity level. When the output power is greater than or equal to P2KW and less than P1KW, the engine generating capacity level is judged to be the standard generating capacity level. When the engine's generating output power is greater than or equal to P3KW and less than P2KW, the engine generating capacity level is judged to be economic generating capacity. grade.

Determining the power generation capacity level of the power battery according to the allowable electric power of the power battery includes: when the allowable charging power of the power battery is greater than or equal to P1KW, the power generation capacity level of the power battery is judged to be the maximum generation capacity level, when the allowable charging power is greater than or equal to P2KW and less than At P1KW, the power battery generating capacity level is judged to be the standard generating capacity level. When the allowable charging power is greater than or equal to P3KW and less than P2KW, the power battery generating capacity level is judged to be the economic generating capacity level.

Further, according to the maximum allowable power generation of the auxiliary motor, the generation output power of the engine in the preset optimal economic zone, and the allowable charging power of the power battery, the auxiliary motor generating capacity level, engine generating capacity level and power After the battery power generation capacity level, the power generation capacity level can be determined in the order of increasing priority of the maximum power generation capacity level, standard power generation capacity level, and economic power generation capacity level, and then the auxiliary motor power generation capacity level, engine power generation capacity level and power battery power generation can be determined The lowest level among the capability levels is the power generation capability level.

According to a specific embodiment of the present invention, as shown in Figure 7, the hybrid electric vehicle of the embodiment of the present invention determines the power generation capability level including the following steps:

S301: Obtain the maximum allowable generating power of the auxiliary motor, the generating output power of the engine in the preset optimal economic zone, and the allowable charging power of the power battery, and perform step S302, step S309, and step S316 respectively.

S302: Determine whether the maximum allowable generating power of the auxiliary motor is greater than or equal to P1KW.

If yes, go to step S303; if not, go to step S304.

S303: Determine that the power generation capacity level of the auxiliary motor is the maximum power generation capacity level, and execute step S323.

S304: Determine whether the maximum allowable power generation of the auxiliary motor is greater than or equal to P2KW.

If yes, go to step S305; if no, go to step S306.

S305: Determine the power generation capacity level of the auxiliary motor as the standard power generation capacity level, and execute step S323.

S306: Determine whether the maximum allowable power generation of the auxiliary motor is greater than or equal to P3KW.

If yes, go to step S307; if not, go to step S308.

S307: Determine that the power generation capacity level of the auxiliary motor is the economic power generation capacity level, and execute step S323.

S308: Determine that the power generation capacity of the auxiliary motor is insufficient, and execute step S323.

S309: Determine whether the power generation output of the engine in the preset optimal economic zone is greater than or equal to P1KW.

If yes, go to step S310; if not, go to step S311.

S310: Determine that the engine power generation capacity level is the maximum power generation capacity level, and execute step S323.

S311: Determine whether the power generation output of the engine in the preset optimal economic area is greater than or equal to P2KW.

If yes, go to step S312; if not, go to step S313.

S312: Determine the engine power generation capability level as the standard power generation capability level, and execute step S323.

S313: Determine whether the power generation output of the engine in the preset optimal economic zone is greater than or equal to P3KW.

If yes, go to step S314; if no, go to step S315.

S314: Determine the engine power generation capability level as the economic power generation capability level, and execute step S323.

S315: Determine that the power generation capacity of the engine is insufficient, and execute step S323.

S316: Determine whether the allowable charging power of the power battery is greater than or equal to P1KW.

If yes, go to step S317; if not, go to step S318.

S317: Determine the power battery generating capacity level as the maximum generating capacity level, and execute step S323.

S318: Determine whether the allowable charging power of the power battery is greater than or equal to P2KW.

If yes, go to step S319; if not, go to step S320.

S319: Determine the power battery power generation capacity level as the standard power generation capacity level, and execute step S323.

S320: Determine whether the allowable charging power of the power battery is greater than or equal to P3KW.

If yes, go to step S321; if no, go to step S322.

S321: Determine the power battery power generation capacity level as the economic power generation capacity level, and execute step S323.

S322: Determine that the power battery has insufficient power generation capacity, and execute step S323.

S323: Determine the lowest level among the power generation capacity level of the auxiliary motor, the power generation capacity level of the engine, and the power generation capacity level of the power battery as the power generation capacity level.

According to an embodiment of the present invention, determining the final power generation level of the hybrid electric vehicle according to the target power consumption level, power generation demand level, and power generation capacity level includes: taking the highest level between the target power consumption level and the power generation demand level as the power generation target level , And use the lowest level between the target power generation level and the power generation capacity level as the final power generation level.

Specifically, as shown in Figure 8, the hybrid electric vehicle of the embodiment of the present invention determines the final power generation level including the following steps:

S401: Obtain the target power consumption level, power generation demand level, and power generation capacity level.

S402: Determine whether the target power consumption level is greater than the power generation demand level.

If yes, go to step S403; if no, go to step S404.

S403: Determine the target power consumption level as the power generation target level, and execute step S405.

S404: Determine the power generation demand level as the power generation target level, and execute step S405.

S405: Determine whether the target power generation level is greater than the power generation capacity level.

If yes, perform step S406; if not, perform step S407.

S406: Determine the power generation capacity level as the final power generation level.

S407: Determine the target power generation level as the final power generation level.

Further, controlling the power generation of the hybrid electric vehicle according to the final power generation level includes: obtaining the final power generation corresponding to the final power generation level; and controlling the hybrid electric vehicle to generate power according to the final power generation power.

Specifically, the final power generation level may be the maximum power generation level, the standard power generation level, and the economic power generation level. When the final power generation level is the maximum power generation level, the power generation of the hybrid electric vehicle can be controlled according to the first preset power generation. When the level is the standard power generation level, the power generation of the hybrid vehicle can be controlled according to the second preset power generation. When the final power generation level is the economic power generation level, the control can be performed according to the third preset power generation. Among them, the first preset power generation may be P1KW, the second preset power generation may be P2KW, and the third preset power generation power may be P3KW.

In summary, according to the power generation control method of a hybrid electric vehicle proposed in an embodiment of the present invention, the hybrid electric vehicle is determined by obtaining the gradient, throttle depth, and power of the electric device of the hybrid electric vehicle according to the gradient, throttle depth, and power of the electric device. Obtain the SOC value and SOC balance point of the power battery of the hybrid electric vehicle, determine the power generation demand level of the hybrid electric vehicle according to the SOC value and SOC balance point of the power battery, and then obtain the maximum value of the auxiliary motor of the hybrid electric vehicle Allowable power generation, and determine the power generation capacity level of the hybrid electric vehicle based on the maximum allowable power generation power of the auxiliary motor, the power generation output power of the engine in the preset optimal economic zone and the allowable charging power of the power battery. According to the target power level, The power generation demand level and the power generation capacity level determine the final power generation level of the hybrid electric vehicle, and the power generation of the hybrid electric vehicle is controlled according to the final power generation level. Therefore, the power generation control method of the hybrid electric vehicle according to the embodiment of the present invention can be based on the gradient of the hybrid electric vehicle, the depth of the throttle, the power of the electric device, the SOC value of the power battery, the SOC balance point, and the maximum value of the auxiliary motor. The maximum allowable generation power, the generation output power of the engine in the preset optimal economic area and the allowable charging power of the power battery determine the generation level, so that the judgment conditions are more comprehensive, and it can be based on the power state of the vehicle, the user's power consumption and The power generation capacity and other comprehensive judgments of the power generation, the realization of power generation control combined with the power consumption situation, improve the power protection capacity of the vehicle, and enhance the user experience.

The present invention also provides a computer-readable storage medium having instructions stored therein. When the instructions are executed, the hybrid electric vehicle executes the above-mentioned power generation control method.

According to the computer-readable storage medium proposed in the embodiment of the present invention, by executing the instructions of the hybrid electric vehicle power generation control method, the power generation power can be comprehensively judged according to the power state of the vehicle, the user power state and the power generation capacity, etc., to achieve power generation control Combining with the electricity consumption situation, improve the power protection capability of the whole vehicle and enhance the user experience.

Figure 9 is a block diagram of a power generation control device for a hybrid electric vehicle according to an embodiment of the present invention. As shown in FIG. 9, the power generation control device 100 for a hybrid electric vehicle according to an embodiment of the present invention includes a controller 500 and a memory 300. The memory 300 stores a plurality of instructions 400, and the instructions 400 are suitable for being loaded and stored by the controller 500. Execution: Obtain the gradient, throttle depth and power of the electric device of the hybrid electric vehicle, determine the target power consumption level of the hybrid electric vehicle according to the gradient, throttle depth and the power of the electric device; obtain the SOC value of the power battery of the hybrid electric vehicle and SOC balance point, according to the SOC value of the power battery and the SOC balance point to determine the power generation demand level of the hybrid electric vehicle; obtain the maximum allowable power generation of the auxiliary motor of the hybrid electric vehicle, and the generation output power of the engine in the preset optimal economic region And the allowable charging power of the power battery, and according to the maximum allowable generation power of the auxiliary motor, the generation output power of the engine in the preset optimal area and the allowable charging power of the power battery to determine the generation capacity level of the hybrid electric vehicle; and according to the target The power consumption level, power generation demand level and power generation capacity level determine the final power generation level of the hybrid electric vehicle, and control the power generation of the hybrid electric vehicle according to the final power generation level.

According to an embodiment of the present invention, the controller 500 further executes: acquiring the gradient interval to which the gradient belongs, and acquiring the gradient target power consumption level corresponding to the gradient interval to which the gradient belongs; acquiring the throttle depth interval to which the throttle depth belongs, and acquiring the throttle depth to which it belongs Throttle depth target power consumption level corresponding to the throttle depth interval of, obtain the power range to which the power of the electric device belongs, and obtain the power target power consumption level corresponding to the power interval to which the power of the electric device belongs; and set the slope target power consumption level , Throttle depth target power consumption level and power target power consumption level the highest level as the target power consumption level.

According to an embodiment of the present invention, the slope is positively correlated with the target power consumption level of the slope, the throttle depth is positively correlated with the target power consumption level of the throttle depth, and the power of the electric device is positively correlated with the power target power consumption level.

According to an embodiment of the present invention, the controller 500 further executes: acquiring the SOC value interval to which the SOC value of the power battery belongs, and acquiring the first power generation demand level corresponding to the SOC value interval to which the SOC value belongs; acquiring the SOC balance point of the power battery The difference between the value and the SOC value, the difference interval to which the difference belongs, and the second power generation demand level corresponding to the difference interval to which the difference belongs; and the highest level of the first power generation demand level and the second power generation demand level As the level of power generation demand.

According to an embodiment of the present invention, the SOC value of the power battery is positively correlated with the first power generation demand level, and the difference between the SOC balance point of the power battery and the SOC value is positively correlated with the second power generation demand level.

According to an embodiment of the present invention, the controller 500 further executes: obtaining the allowable generating power interval to which the maximum allowable generating power of the auxiliary motor belongs, and obtaining the auxiliary motor generating capacity corresponding to the allowable generating power interval to which the maximum allowable generating power of the auxiliary motor belongs Level; obtain the generation output power range to which the generator output power of the engine in the preset optimal economic zone belongs, and obtain the engine power generation corresponding to the generation output power range to which the generator output power of the engine in the preset optimal economic zone belongs Capability level; obtain the allowable charging power interval to which the allowable charging power of the power battery belongs, and obtain the power electricity corresponding to the allowable charging power interval to which the allowable charging power of the power battery belongs The power generation capacity level of the pool; and the lowest level among the power generation capacity level of the auxiliary motor, the power generation capacity level of the engine and the power generation capacity level of the power battery is used as the power generation capacity level.

According to an embodiment of the present invention, the maximum allowable power generation of the auxiliary motor is positively related to the power generation capacity level of the auxiliary motor, and the power generation output power of the engine in the preset optimal economic zone is positively related to the power generation capacity level of the engine. The charging power is positively correlated with the power battery generating capacity level.

According to an embodiment of the present invention, the controller 500 further executes: taking the highest level between the target power consumption level and the power generation demand level as the power generation target level, and taking the lowest level between the power generation target level and the power generation capacity level as the final power generation grade.

According to an embodiment of the present invention, the controller 500 further executes: obtaining the final power generation corresponding to the final power generation level, and controlling the hybrid electric vehicle to generate power according to the final power generation.

In summary, according to the power generation control device for a hybrid electric vehicle proposed in an embodiment of the present invention, the hybrid electric vehicle is determined according to the gradient, the throttle depth and the power of the electric device by obtaining the gradient of the hybrid electric vehicle, the depth of the throttle and the power of the electric device The target power consumption level of the hybrid electric vehicle; obtain the SOC value and SOC balance point of the power battery of the hybrid electric vehicle, and determine the power generation demand level of the hybrid electric vehicle according to the SOC value and SOC balance point of the power battery; obtain the maximum allowable auxiliary motor of the hybrid electric vehicle Generated power, the generator output power of the engine in the preset optimal economic zone and the allowable charging power of the power battery, based on the maximum allowable generating power of the auxiliary motor, and the generator output power and power of the engine in the preset optimal zone The allowable charging power of the battery determines the power generation capacity level of the hybrid electric vehicle; and determines the final power generation level of the hybrid electric vehicle according to the target power consumption level, power generation demand level and power generation capacity level, and controls the power generation of the hybrid electric vehicle according to the final power generation level . Therefore, the power generation control device of the hybrid electric vehicle according to the embodiment of the present invention can be based on the gradient of the hybrid electric vehicle, the depth of the throttle, the power of the electric device, the SOC value of the power battery, the SOC balance point, the maximum allowable power generation of the auxiliary motor, The power generation output of the engine in the preset optimal economic zone and the allowable power battery The allowable charging power determines the power generation level, so that the judgment conditions are more comprehensive. The power generation power can be comprehensively judged based on the power state of the vehicle, the user power state and the power generation capacity, etc., to realize the power generation control combined with the power consumption situation, and improve the power protection ability of the whole vehicle. Improve user experience.

The embodiment of the present invention also provides a hybrid electric vehicle.

Figure 10 is a block diagram of a hybrid vehicle according to an embodiment of the present invention. As shown in FIG. 10, the hybrid vehicle 1000 includes the aforementioned hybrid vehicle power generation control device 100.

According to the hybrid electric vehicle of the embodiment of the present invention, the power generation control device of the hybrid electric vehicle can comprehensively determine the power generation according to the power state of the vehicle, the user's power consumption state and the power generation capacity, etc., and realize the power generation control combined with the power consumption situation to improve The vehicle’s power-guarantee capability improves user experience.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", " The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the indicated device or element must It has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. , Or into a whole; it can be mechanically connected or electrically connected; it can be straight The connection can also be indirectly connected through an intermediate medium, and it can be a communication between two elements or an interaction relationship between two elements, unless specifically defined otherwise. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood according to specific circumstances.

In the present invention, unless expressly stipulated and defined otherwise, the first feature “on” or “under” the second feature may be in direct contact with the first and second features, or the first and second features may be indirectly through an intermediary. contact. Moreover, the "above", "above" and "above" of the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the level of the first feature is higher than the second feature. The “below”, “below” and “below” of the second feature of the first feature may mean that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , Structure, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials, or characteristics can be combined in any one or plural embodiments or examples in an appropriate manner. In addition, those skilled in the art can combine and combine the different embodiments or examples and the characteristics of the different embodiments or examples described in this specification without contradicting each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can comment on the foregoing within the scope of the present invention. The embodiment undergoes changes, modifications, substitutions and modifications.

Claims (18)

A power generation control method for a hybrid electric vehicle is characterized by comprising the following steps: obtaining a gradient, a throttle depth, and the power of an electric device of the hybrid electric vehicle, according to the gradient, the throttle depth and the power of the electric device The power determines a target power consumption level of the hybrid electric vehicle; obtains the SOC value and SOC balance point of a power battery of the hybrid electric vehicle, and determines a power generation demand of the hybrid electric vehicle according to the SOC value and SOC balance point of the power battery Level; Obtain the maximum allowable generating power of an auxiliary motor of the hybrid electric vehicle, the generating output power of the engine in the preset optimal economic zone and the allowable charging power of the power battery, and according to the maximum allowable generating power of the auxiliary motor , The power generation output power of the engine in the preset optimal economic area and the allowable charging power of the power battery determine the power generation capacity level of the hybrid electric vehicle; determine the power generation capacity level according to the target power consumption level, the power generation demand level and the power generation capacity level A final power generation level of the hybrid electric vehicle, and the power generation of the hybrid electric vehicle is controlled according to the final power generation level; wherein, a power generation demand level of the hybrid electric vehicle is determined according to the SOC value and the SOC balance point of the power battery , Including: obtaining the SOC value interval to which the SOC value of the power battery belongs, and obtaining a first power generation demand level corresponding to the SOC value interval to which the SOC value belongs; obtaining a difference between the SOC balance point of the power battery and the SOC value , Obtain the difference interval to which the difference belongs, and obtain a second power generation demand level corresponding to the difference interval to which the difference belongs; use the highest level of the first power generation demand level and the second power generation demand level as the Power generation demand level. According to the power generation control method of a hybrid electric vehicle as described in item 1 of the scope of patent application, the determination of a target power consumption level of the hybrid electric vehicle according to the slope, the throttle depth and the power of the electric device includes: Obtain the gradient interval to which the gradient belongs, and obtain a gradient target power consumption level corresponding to the gradient interval to which the gradient belongs; obtain the throttle depth interval to which the throttle depth belongs, and obtain a throttle depth corresponding to the throttle depth interval to which the throttle depth belongs Target power consumption level; obtain the power interval to which the power of the electric device belongs, and obtain a power target power consumption level corresponding to the power interval to which the power of the electric device belongs; the slope target power consumption level, the throttle depth target The highest level of the power consumption level and the target power consumption level is taken as the target power consumption level. For example, the power generation control method of a hybrid electric vehicle described in item 2 of the scope of patent application, wherein the slope is positively correlated with the target power consumption level of the slope, the throttle depth is positively correlated with the target power consumption level of the throttle depth, and the power consumption device The power of is positively correlated with the target power consumption level. The power generation control method of a hybrid electric vehicle as described in item 1 of the scope of patent application, wherein the SOC value of the power battery is positively correlated with the first power generation demand level, and the difference between the SOC balance point of the power battery and the SOC value is The second generation demand level is positively correlated. The power generation control method of a hybrid electric vehicle as described in item 1 of the scope of patent application, wherein the power generation control method is based on the maximum allowable power generation of the auxiliary motor, the power generation output power of the engine in the preset optimal economic region, and the power battery Allowable charging power to determine a generating capacity level of the hybrid electric vehicle includes: obtaining the allowable generating power interval to which the maximum allowable generating power of the auxiliary motor belongs, and obtaining the corresponding allowable generating power interval to which the maximum allowable generating power of the auxiliary motor belongs A power generation capacity level of the auxiliary motor; obtain the generation output power range of the generator output power of the engine in the preset optimal economic area, and obtain the generation output power of the engine in the preset optimal economic area An engine generating capacity level corresponding to the output power range; Obtain the allowable charging power range to which the allowable charging power of the power battery belongs, and obtain a power battery generating capacity level corresponding to the allowable charging power range to which the allowable charging power of the power battery belongs; The lowest level among the ability level and the power generation capacity level of the power battery is regarded as the power generation capacity level. The power generation control method of a hybrid electric vehicle as described in item 5 of the scope of patent application, wherein the maximum allowable power generation of the auxiliary motor is positively correlated with the power generation capacity of the auxiliary motor, and the engine is in the preset optimal economic zone The generated output power is positively correlated with the generating capacity level of the engine, and the allowable charging power of the power battery is positively correlated with the generating capacity level of the power battery. According to the power generation control method of a hybrid electric vehicle as described in item 1 of the scope of patent application, the determination of a final power generation level of the hybrid electric vehicle according to the target power consumption level, the power generation demand level and the power generation capacity level includes: The highest level between the target power consumption level and the power generation demand level is taken as a power generation target level, and the lowest level between the power generation target level and the power generation capability level is taken as the final power generation level. According to the power generation control method of a hybrid electric vehicle described in item 1 of the scope of patent application, the controlling the power generation of the hybrid electric vehicle according to the final power generation level includes: obtaining a final power generation corresponding to the final power generation level; According to the final power generation, the hybrid electric vehicle is controlled to generate power. A computer-readable storage medium is characterized by having instructions stored therein, and when the instructions are executed, the power generation control of a hybrid electric vehicle as described in any one of items 1 to 8 of the scope of the patent application is executed method. A power generation control device for a hybrid electric vehicle, which is characterized by comprising a controller and a memory, the memory stores a plurality of instructions, and the instructions are suitable for being loaded and executed by the controller: obtaining the information of the hybrid vehicle A gradient, a throttle depth, and the power of a power-consuming device, and a target power consumption level of the hybrid electric vehicle is determined according to the slope, the throttle depth and the power of the power-consuming device; Obtain the SOC value and SOC balance point of a power battery of the hybrid electric vehicle, and determine the power generation demand level of the hybrid electric vehicle according to the SOC value and SOC balance point of the power battery; obtain the maximum allowable power generation of the auxiliary motor of the hybrid electric vehicle Power, the generator output power of the engine in the preset optimal economic zone and the allowable charging power of the power battery, based on the maximum allowable generator power of the auxiliary motor, the generator output power of the engine in the preset optimal zone and The allowable charging power of the power battery determines the power generation capacity level of the hybrid electric vehicle; and determines a final power generation level of the hybrid electric vehicle according to the target power consumption level, the power generation demand level, and the power generation capacity level, and according to the final power generation The level controls the power generation of the hybrid electric vehicle; wherein, the controller further executes: obtain the SOC value interval to which the SOC value of the power battery belongs, and obtain a first power generation demand level corresponding to the SOC value interval to which the SOC value belongs Obtain a difference between the SOC balance point of the power battery and the SOC value, obtain the difference interval to which the difference belongs, and obtain a second power generation demand level corresponding to the difference interval to which the difference belongs; and The highest level of a power generation demand level and the second power generation demand level is used as the power generation demand level. For example, the power generation control device for a hybrid electric vehicle described in item 10 of the scope of patent application, wherein the controller further executes: acquiring the gradient interval to which the gradient belongs, and acquiring a gradient target power consumption level corresponding to the gradient interval to which the gradient belongs ; Obtain the throttle depth interval to which the throttle depth belongs, and obtain a throttle depth target power consumption level corresponding to the throttle depth interval to which the throttle depth belongs; obtain the power interval to which the power of the electric device belongs, and obtain the power consumption of the electric device A target power consumption level corresponding to the power range to which the power belongs; and The highest level among the slope target power level, the throttle depth target power level, and the power target power level is taken as the target power level. For example, the power generation control device of a hybrid electric vehicle described in item 11 of the scope of patent application, wherein the slope is positively correlated with the target power consumption level of the slope, the throttle depth is positively correlated with the target power consumption level of the throttle depth, and the power consumption device The power of is positively correlated with the target power consumption level. The power generation control device for a hybrid electric vehicle according to item 10 of the scope of patent application, wherein the SOC value of the power battery is positively correlated with the first power generation demand level, and the difference between the SOC balance point of the power battery and the SOC value is The second generation demand level is positively correlated. For the hybrid electric vehicle power generation control device described in item 10 of the scope of patent application, the controller further executes: obtain the allowable generation power interval to which the maximum allowable generation power of the auxiliary motor belongs, and obtain the maximum allowable generation power of the auxiliary motor An auxiliary motor generating capacity level corresponding to the allowable generating power range to which the generated power belongs; obtaining the generating output power range to which the generating output power of the engine in the preset optimal economic zone belongs, and obtaining the preset optimal output power of the engine An engine generating capacity level corresponding to the generating output power range to which the generated output power in the economic area belongs; obtaining the allowable charging power range to which the allowable charging power of the power battery belongs, and obtaining the allowable charging power to which the allowable charging power of the power battery belongs A power battery power generation capacity level corresponding to the interval; and the lowest level among the auxiliary motor power generation capacity level, the engine power generation capacity level, and the power battery power generation capacity level is taken as the power generation capacity level. For example, the power generation control device for a hybrid electric vehicle described in item 14 of the scope of patent application, wherein the maximum allowable power generation of the auxiliary motor is positively correlated with the power generation capacity level of the auxiliary motor, and the power generation The power generation output of the motive in the preset optimal economic region is positively correlated with the power generation capacity level of the engine, and the allowable charging power of the power battery is positively correlated with the power generation capacity level of the power battery. For the hybrid electric vehicle power generation control device described in item 10 of the scope of patent application, the instruction is loaded by a control module and further executed: the highest level between the target power consumption level and the power generation demand level is taken as A power generation target level, and the lowest level between the power generation target level and the power generation capability level is used as the final power generation level. For example, in the power generation control device for a hybrid electric vehicle described in item 10 of the scope of patent application, the controller further executes: obtain a final power generation corresponding to the final power generation level, and control the hybrid vehicle to perform according to the final power generation Power generation. A hybrid electric vehicle is characterized by comprising: the power generation control device of the hybrid electric vehicle as described in any one of items 10 to 17 in the scope of patent application.

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