Parameter matching type selection recommendation method and system for hybrid electric vehicle

Abstract

The invention relates to the technical field of electro-hydraulic hybrid electric vehicles, in particular to a parameter matching type selection recommendation method and system for a hybrid electric vehicle, and the method comprises the steps: obtaining the dynamic working condition information of a to-be-matched hybrid electric vehicle, and obtaining the operation parameter information of the to-be-matched hybrid electric vehicle through calculation based on the dynamic working condition information; a user selects a corresponding target matching type selection system from the multiple matching type selection systems, and corresponding target operation parameters are obtained based on the target matching type selection system; and performing adaptive calculation on the operation parameter information to obtain target operation parameter information of the target operation parameters, and generating a corresponding model selection recommendation result based on the target operation parameter information. According to the electro-hydraulic hybrid electric vehicle, energy is efficiently recycled through an electromechanical-hydraulic coupling technology, and the technology provides smooth driving experience and optimizes acceleration performance and driving stability through complementary intelligent switching of a motor and a hydraulic system.

Description

Technical Field

[0001] The present invention relates to the technical field of electro - hydraulic hybrid vehicles, and particularly to a method and system for parameter matching selection recommendation for hybrid vehicles. Background Art

[0002] With the increasing shortage of global oil resources and the exacerbation of environmental pollution problems, the development of new energy - saving and environment - friendly vehicles has become an important development direction of the automotive industry. Electro - hydraulic hybrid vehicles have attracted more and more attention due to their advantages of low fuel consumption and low emissions.

[0003] Electro - hydraulic hybrid vehicles can recover energy more efficiently through electro - mechanical - hydraulic coupling technology. In some studies, the energy recovery rate of electro - hydraulic hybrid vehicles can be significantly improved by optimizing the control strategy. Electro - hydraulic hybrid vehicles can provide a smooth driving experience. Due to the complementarity of the motor and the hydraulic system, they can be intelligently switched under different driving conditions, providing better acceleration performance and driving stability. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for selecting a motor for an electro - hydraulic hybrid system of a vehicle, aiming to match a suitable motor according to the power requirements of the vehicle under various different working conditions, match a suitable fuel cell and power battery according to the power and requirements of the motor, and match a suitable hydraulic pump - motor and corresponding accumulator according to the regenerative braking of the vehicle.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] According to the first aspect of the present invention, the present invention claims a method for parameter matching selection recommendation for hybrid vehicles, including:

[0007] Obtain the dynamic working condition information of the hybrid vehicle to be matched, and calculate the operating parameter information of the hybrid vehicle to be matched based on the dynamic working condition information;

[0008] The user selects the corresponding target matching selection system from multiple matching selection systems, and obtains the corresponding target operating parameters based on the target matching selection system;

[0009] Perform an adaptability calculation on the operating parameter information to obtain the target operating parameter information of the target operating parameters, and generate a corresponding selection recommendation result based on the target operating parameter information.

[0010] Further, the step of obtaining the dynamic working condition information of the hybrid vehicle to be matched and calculating the operating parameter information of the hybrid vehicle to be matched based on the dynamic working condition information further includes:

[0011] Calculate the output power of the motor and the output power of the fuel cell according to the dynamic working conditions of the hybrid vehicle to be matched;

[0012] Obtain the first power for the hybrid vehicle to be matched to travel at the highest speed, the second power for traveling at the maximum climbing gradient, and the third power during the acceleration process.

[0013] Further, when the user selects the corresponding target matching selection system from multiple matching selection systems and obtains the corresponding target operating parameters based on the target matching selection system, it further includes:

[0014] The user selects the corresponding target matching selection system from the vehicle power matching selection system, the electrical energy storage matching selection system, and the hydraulic energy storage matching selection system;

[0015] When the target matching selection system is the vehicle power matching selection system, the corresponding target operating parameters are the maximum output power of the motor required under the three working conditions of the hybrid vehicle to be matched and the maximum output power of the hydraulic motor required during the acceleration process of the hybrid vehicle to be matched;

[0016] When the target matching selection system is the electrical energy storage matching selection system, the corresponding target operating parameters are the capacity of the fuel cell determined by the maximum power working time of the fuel cell and the lowest thermal efficiency value, and the voltage and capacity of the power battery determined by the maximum power of the power battery, the voltage, internal resistance, and capacity of a single battery;

[0017] When the target matching selection system is the hydraulic energy storage matching selection system, the corresponding target operating parameters are the working pressure of the hydraulic accumulator determined by the driving speed of the hydraulic motor alone and the volume of the accumulator determined by the energy recovery that satisfies the regenerative braking of the hybrid vehicle to be matched.

[0018] Further, when the target matching selection system is the vehicle power matching selection system and the corresponding target operating parameter is the maximum output power of the motor required under the three working conditions of the hybrid vehicle to be matched, it further includes:

[0019] Calculate the maximum power of the motor of the hybrid vehicle to be matched based on the first power, the second power, and the third power;

[0020] Calculate the rated power of the motor of the hybrid vehicle to be matched in combination with the vehicle overload factor.

[0021] Further, when the target matching selection system is the vehicle power matching selection system and the corresponding target operating parameter is the maximum output power of the hydraulic motor required during the acceleration process of the hybrid vehicle to be matched, it further includes:

[0022] Calculate the maximum torque of the motor based on the rated speed and maximum power of the motor of the hybrid vehicle to be matched.

[0023] Calculate the rated torque of the motor based on the rated speed and rated power of the motor of the hybrid vehicle to be matched.

[0024] Obtain the vehicle transmission efficiency, vehicle speed after acceleration, acceleration, frontal area, air resistance coefficient, rotating mass conversion coefficient, rolling resistance coefficient, curb weight of the vehicle, and power consumption of fuel cell accessories under the working conditions of the hybrid vehicle to be matched, and calculate the first output power of the fuel cell.

[0025] Determine the second output power of the fuel cell based on the percentage of the fuel cell in the output power and the maximum power of the motor.

[0026] Obtain the maximum power of the fuel cell based on the first output power and the second output power of the fuel cell.

[0027] Determine the parameters of the hydraulic pump motor, and calculate the first output power of the hydraulic motor based on the vehicle transmission efficiency, vehicle speed after acceleration, acceleration, frontal area, air resistance coefficient, rotating mass conversion coefficient, rolling resistance coefficient, and curb weight of the vehicle under the working conditions of the hybrid vehicle to be matched.

[0028] Calculate the maximum torque of the hydraulic motor by combining the maximum power speed of the hydraulic motor and the maximum power of the motor.

[0029] Further, when the target matching selection system is an electric energy storage matching selection system, the corresponding target operating parameters are the capacity of the fuel cell determined by the working time of the fuel cell at the maximum power and the lowest thermal efficiency value, and the voltage and capacity of the power battery determined by the maximum power of the power battery, the voltage, internal resistance, and capacity of a single battery. It further includes:

[0030] Determine the energy C required for the maximum working duration of the fuel cell based on the maximum output power of the fuel cell. f ;

[0031] Determine the capacity of the fuel cell based on the lower calorific value of the fuel, the maximum power of the fuel cell, and the output efficiency at the maximum power of the fuel cell.

[0032] Determine the parameters of the power battery pack, and calculate the ratio of the output power of the power battery based on the output power of the power battery and the percentage of the fuel cell in the output power.

[0033] Calculate the output power of the power battery by combining the total efficiency of the power battery pack.

[0034] Determine the voltage, internal resistance, and capacity of the selected single battery cell, and calculate the power and number of single battery cells in the battery pack;

[0035] Based on the rated power of the motor, determine the commonly used motor for the hybrid vehicle, determine the motor voltage, obtain the number of series-connected single battery cells in the battery pack, and calculate the total voltage based on the voltage of the selected single battery cell.

[0036] Based on the number and series connection number of single battery cells in the battery pack, obtain the number of parallel-connected single battery cell groups in the battery pack.

[0037] Based on the number of parallel-connected single battery cells in the battery pack, obtain the capacity of the battery pack.

[0038] Further, when the target matching and selection system is a hydraulic energy storage matching and selection system, the corresponding target operating parameters are the working pressure of the hydraulic accumulator determined by the driving speed of the hydraulic motor alone and the volume of the accumulator determined by meeting the energy recovery of the regenerative braking of the hybrid vehicle to be matched, and further include:

[0039] Determine the minimum working pressure, maximum working pressure, and charging pressure of the hydraulic accumulator through the first output power of the hydraulic motor, the maximum vehicle speed in the single-drive mode of the hydraulic pump / motor, and the displacement of the hydraulic pump / motor;

[0040] Determine the volume V of the hydraulic accumulator by meeting the energy recovery of vehicle regenerative braking, in combination with the initial speed of vehicle braking, the polytropic process index of the gas, the maximum working pressure of the hydraulic accumulator, and the charging pressure of the accumulator 0 。

[0041] According to the second aspect of the present invention, the present invention claims protection for a parameter matching and selection recommendation system for a hybrid vehicle, including:

[0042] One or more processors;

[0043] A memory storing one or more programs thereon, and when the one or more programs are executed by the one or more processors, the one or more processors implement the parameter matching and selection recommendation method for a hybrid vehicle as described above.

[0044] The present invention relates to the technical field of electro-hydraulic hybrid vehicles, and particularly to a method and system for parameter matching and selection recommendation for hybrid vehicles. The dynamic operating condition information of a hybrid vehicle to be matched is obtained, and the operating parameter information of the hybrid vehicle to be matched is calculated based on the dynamic operating condition information. The user selects a corresponding target matching and selection system from multiple matching and selection systems, and obtains the corresponding target operating parameters based on the target matching and selection system. The operating parameter information is adaptively calculated to obtain the target operating parameter information of the target operating parameters, and based on the target operating parameter information, a corresponding selection recommendation result is generated. The electro-hydraulic hybrid vehicle of the present invention efficiently recovers energy through an electromechanical-hydraulic coupling technology, which provides a smooth driving experience, optimizes the acceleration performance and driving stability through the complementary and intelligent switching between the motor and the hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 FIG. is a flowchart of a method for parameter matching and selection recommendation for a hybrid vehicle claimed in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] The terms "first", "second", and "third" in the present invention are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0048] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the invention. Appearances of the phrase in the specification in various places are not necessarily all referring to the same embodiment, nor are they independent or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will understand explicitly and implicitly that the embodiments described herein can be combined with other embodiments.

[0049] According to a first embodiment of the present invention, the present invention claims a method for recommending parameter matching and selection for a hybrid vehicle. Referring to Figure 1 , including:

[0050] Obtain the dynamic operating condition information of the hybrid vehicle to be matched, and calculate the operating parameter information of the hybrid vehicle to be matched based on the dynamic operating condition information;

[0051] The user selects a corresponding target matching and selection system from multiple matching and selection systems, and obtains corresponding target operating parameters based on the target matching and selection system;

[0052] Perform adaptive calculation on the operating parameter information to obtain the target operating parameter information of the target operating parameters, and generate a corresponding selection recommendation result based on the target operating parameter information.

[0053] Furthermore, the step of obtaining the dynamic operating condition information of the hybrid vehicle to be matched and calculating the operating parameter information of the hybrid vehicle to be matched based on the dynamic operating condition information further includes:

[0054] Calculate the output power of the motor and the output power of the fuel cell according to the dynamic operating condition of the hybrid vehicle to be matched;

[0055] Obtain the first power for the hybrid vehicle to be matched to travel at the highest speed, the second power for climbing the maximum gradient, and the third power during the acceleration process.

[0056] Wherein, in this embodiment, obtain the power P 1 ;

[0057] Obtain the power P 2 ;

[0058] Obtain the power P 3 .

[0059] Furthermore, the step of the user selecting a corresponding target matching and selection system from multiple matching and selection systems and obtaining corresponding target operating parameters based on the target matching and selection system further includes:

[0060] The user selects the corresponding target matching and selection system from the vehicle power matching and selection system, the electric energy storage matching and selection system, and the hydraulic energy storage matching and selection system;

[0061] When the target matching and selection system is the vehicle power matching and selection system, the corresponding target operating parameters are the maximum output power of the motor required under three working conditions of the hybrid vehicle to be matched and the maximum output power of the hydraulic motor required during the acceleration process of the hybrid vehicle to be matched;

[0062] When the target matching and selection system is the electric energy storage matching and selection system, the corresponding target operating parameters are the capacity of the fuel cell determined by the maximum power working time of the fuel cell and the lowest thermal efficiency value and the voltage and capacity of the power battery determined by the maximum power of the power battery and the voltage, internal resistance, and capacity of a single battery;

[0063] When the target matching and selection system is the hydraulic energy storage matching and selection system, the corresponding target operating parameters are the working pressure of the hydraulic accumulator determined by the driving speed of the hydraulic motor alone and the volume of the accumulator determined by meeting the energy recovery of the regenerative braking of the hybrid vehicle to be matched.

[0064] Furthermore, when the target matching and selection system is the vehicle power matching and selection system, the corresponding target operating parameter is the maximum output power of the motor required under three working conditions of the hybrid vehicle to be matched, and it further includes:

[0065] Calculating the maximum power of the motor of the hybrid vehicle to be matched based on the first power, the second power, and the third power;

[0066] Calculating the rated power of the motor of the hybrid vehicle to be matched in combination with the vehicle overload coefficient.

[0067] Among them, in this embodiment, according to the power P 1 、P 2 、P 3 , obtaining the maximum power P max of the motor;

[0068] P max =max{P 1 ,P 2 ,P 3};

[0069] Calculating the rated power P e of the motor;

[0070]

[0071] Among them, λ is the vehicle overload coefficient of the electro-hydraulic hybrid vehicle.

[0072] Further, when the target matching selection system is a vehicle power matching selection system and the corresponding target operating parameter is the maximum output power of the hydraulic motor required during the acceleration process of the hybrid vehicle to be matched, it further includes:

[0073] Calculating the maximum torque of the motor based on the rated speed and maximum power of the motor of the hybrid vehicle to be matched;

[0074] Calculating the rated torque of the motor based on the rated speed and rated power of the motor of the hybrid vehicle to be matched;

[0075] Obtaining the vehicle transmission efficiency, vehicle speed after acceleration, acceleration, frontal area, air resistance coefficient, rotating mass conversion coefficient, rolling resistance coefficient, curb weight of the vehicle, and power consumption of the fuel cell accessories under the operating conditions of the hybrid vehicle to be matched, and calculating the first output power of the fuel cell;

[0076] Determining the second output power of the fuel cell based on the percentage of the fuel cell in the output power and the maximum power of the motor;

[0077] Obtaining the maximum power of the fuel cell based on the first output power and the second output power of the fuel cell;

[0078] Determining the parameters of the hydraulic pump motor, and calculating the first output power of the hydraulic motor based on the vehicle transmission efficiency, vehicle speed after acceleration, acceleration, frontal area, air resistance coefficient, rotating mass conversion coefficient, rolling resistance coefficient, and curb weight of the vehicle under the operating conditions of the hybrid vehicle to be matched;

[0079] Calculating the maximum torque of the hydraulic motor in combination with the maximum power speed of the hydraulic motor and the maximum power of the motor.

[0080] Among them, in this embodiment, calculating the maximum torque T of the motor Emax ;

[0081]

[0082] Calculating the rated torque T of the motor Ee ;

[0083]

[0084] Among them, n e is the rated speed of the motor;

[0085] Calculating the first output power P of the fuel cell through the design requirements and operating conditions f1 :

[0086]

[0087] Among them, η T is the vehicle transmission efficiency; v a is the vehicle speed after acceleration; is the vehicle acceleration; δ is the rotational mass conversion coefficient; m is the curb weight of the vehicle; A is the frontal area of the vehicle; C D is the aerodynamic drag coefficient of the vehicle; f is the rolling resistance coefficient of the vehicle; P ap is the power consumption of the fuel cell accessories.

[0088] Determine the second output power P f2 ;

[0089] P f2 = xP max ,

[0090] Among them, x is the percentage of the fuel cell in the output power.

[0091] According to the power P f1 , P f2 , obtain the maximum power P fmax ;

[0092] P fmax = max{P f1 , P f2};

[0093] The parameters of the hydraulic pump motor are determined. According to the design requirements, the hydraulic motor is used during the acceleration process of vehicle starting, and the output power P H of the hydraulic motor is obtained:

[0094]

[0095] Among them, η T is the vehicle transmission efficiency;

[0096] Calculate the maximum torque T Hmax of the hydraulic motor:

[0097]

[0098] Among them, n max is the maximum power speed, and α is the torque adaptability coefficient.

[0099] Furthermore, when the target matching selection system is the electric energy storage matching selection system, the corresponding target operating parameters are the capacity of the fuel cell determined by the maximum power working time and the lowest thermal efficiency value of the fuel cell, and the number of single cells determined by the maximum power of the power battery, the voltage and internal resistance of a single cell. It also includes:

[0100] Determine the energy C required for the maximum working duration of the fuel cell based on the maximum output power of the fuel cell f ;

[0101] Determine the capacity of the fuel cell based on the low calorific value of the fuel, the maximum power of the fuel cell, and the output efficiency at the maximum power of the fuel cell;

[0102] Determine the power battery pack parameters, and calculate the ratio of the output power occupied by the power battery based on the output power of the power battery and the percentage of the fuel cell in the output power;

[0103] Combined with the total efficiency of the power battery pack, calculate the output power of the power battery;

[0104] Determine the voltage, internal resistance, and capacity of the selected single cell, and calculate the power and number of single cells in the battery pack;

[0105] Based on the rated power of the motor, determine the common motor of the hybrid vehicle, determine the motor voltage, obtain the number of series-connected single cells in the battery pack, and calculate the total voltage according to the voltage of the selected single cell.

[0106] Based on the number and number of series-connected single cells in the battery pack, obtain the number of parallel-connected single cell groups in the battery pack.

[0107] Based on the number of parallel-connected single cells in the battery pack, obtain the capacity of the battery pack.

[0108] Based on the capacity of the single cell in the battery pack, obtain the capacity of the power battery.

[0109] Among them, in this embodiment, determine the energy C required for the maximum working duration t of the fuel cell at the maximum output power f ;

[0110] C f = t·P fmax ;

[0111] Determine the capacity m of the fuel cell f ;

[0112]

[0113] Among them, is the low calorific value of the fuel;

[0114] Determine the power battery pack parameters:

[0115] According to the design requirements, the ratio P of the output power occupied by the power battery B :

[0116] P B=(1 - x)P Emax ;

[0117] Determine the output power P of the battery Bmax :

[0118]

[0119] where η b is the total efficiency of the power battery pack.

[0120] According to the voltage V BC , internal resistance R BC and capacity C BC of the selected single battery, obtain the power of the single battery in the battery pack and the number of single batteries in the battery pack

[0121] According to the rated power of the motor, determine the common motor of the hybrid vehicle and determine the motor voltage V CE ;

[0122] Determine the number of series-connected single batteries in the battery pack: (Round up)

[0123] Determine the total voltage V of the battery pack C =V BC ·n s ;

[0124] Determine the number of parallel connections in the battery pack: (Round up)

[0125] Determine the capacity of the battery pack: C E =n p ·C BC

[0126] Furthermore, when the target matching and selection system is a hydraulic energy storage matching and selection system, the corresponding target operating parameters are to determine the working pressure of the hydraulic accumulator through the driving speed of the hydraulic motor alone and the volume of the accumulator determined by meeting the energy recovery of the regenerative braking of the hybrid vehicle to be matched, and further include:

[0127] Determine the minimum working pressure, maximum working pressure and charging pressure of the hydraulic accumulator through the first output power of the hydraulic motor, the maximum vehicle speed in the single drive mode of the hydraulic pump / motor and the displacement of the hydraulic pump / motor;

[0128] Determine the volume V of the hydraulic accumulator by meeting the energy recovery of the vehicle's regenerative braking, combining the initial speed of the vehicle braking, the polytropic process index of the gas, the maximum working pressure of the hydraulic accumulator and the charging pressure of the accumulator 0 .

[0129] Among them, in this embodiment, by satisfying the output power P of the hydraulic accumulator H , the minimum working pressure P of the hydraulic accumulator is determined 1 and the maximum working pressure P 2 as well as the charging pressure P of the accumulator 0 ;

[0130]

[0131] P 1 =(0.6 - 0.85)P 2

[0132] P 0 =(0.8 - 0.85)P 1

[0133] Among them, v mid is the maximum vehicle speed in the single - drive mode of the hydraulic pump / motor; V max is the displacement of the hydraulic pump / motor; by satisfying the energy recovery of the vehicle's regenerative braking, the volume V of the hydraulic accumulator is determined 0

[0134]

[0135] Among them, u max is the initial speed of vehicle braking; n is the polytropic process index of the gas.

[0136] According to the second embodiment of the present invention, the present invention claims a parameter matching and selection recommendation system for a hybrid vehicle, including:

[0137] One or more processors;

[0138] A memory storing one or more programs, when the one or more programs are executed by the one or more processors, enabling the one or more processors to implement the parameter matching and selection recommendation method for a hybrid vehicle.

[0139] In several embodiments provided by the present invention, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection of devices or units can be in electrical, mechanical or other forms.

[0140] In addition, in each embodiment of the present invention, each functional unit can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. The above are only the embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

[0141] The specific embodiments of the invention have been described in detail above, but they are only examples, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modification or substitution of the invention is also within the scope of the present invention. Therefore, all equivalent transformations, modifications, improvements, etc. made without departing from the spirit and principles of the present invention should be covered by the scope of the present invention.

Claims

1. A parameter matching and selection recommendation method for hybrid electric vehicles, characterized in that: include: Acquiring dynamic operating condition information of the hybrid vehicle to be matched, and calculating and obtaining operating parameter information of the hybrid vehicle to be matched based on the dynamic operating condition information; The user selects a corresponding target matching selection system from multiple matching selection systems, and obtains corresponding target operating parameters based on the target matching selection system; Adaptively calculate the operating parameter information to obtain target operating parameter information of the target operating parameter, and generate corresponding selection recommendation results based on the target operating parameter information.

2. A parameter matching and selection recommendation method for hybrid electric vehicles according to claim 1, characterized in that: The step of acquiring dynamic operating condition information of the hybrid vehicle to be matched, and calculating and obtaining operating parameter information of the hybrid vehicle to be matched based on the dynamic operating condition information, further includes: Calculating the output power of the motor and the output power of the fuel cell according to the dynamic working condition of the hybrid vehicle to be matched; A first power that satisfies the hybrid vehicle to be matched and travels at the highest speed, a second power that satisfies the hybrid vehicle to travel at the maximum climbing gradient, and a third power during acceleration is obtained.

3. A parameter matching and selection recommendation method for hybrid electric vehicles according to claim 2, characterized in that: The user selects a corresponding target matching selection system from a plurality of matching selection systems, and obtains corresponding target operating parameters based on the target matching selection system, further comprising: The user selects the corresponding target matching selection system from the vehicle power matching selection system, electric energy storage matching selection system, and hydraulic energy storage matching selection system; When the target matching selection system is a vehicle power matching selection system, the corresponding target operating parameters are the maximum output power of the motor required under the three working conditions of the hybrid vehicle to be matched and the maximum output power of the hydraulic motor required during the acceleration process of the hybrid vehicle to be matched; When the target matching and selection system is an electric energy storage matching and selection system, the corresponding target operating parameters are the capacity of the fuel cell determined by the maximum power working time and the minimum thermal efficiency value of the fuel cell, and the voltage and capacity of the power battery determined by the maximum power of the power battery and the voltage, internal resistance and capacity of a single battery; When the target matching and selection system is a hydraulic energy storage matching and selection system, the corresponding target operating parameters are the working pressure of the hydraulic accumulator determined by the driving speed of the hydraulic motor alone and the volume of the accumulator determined by satisfying the energy recovery of the regenerative braking of the hybrid vehicle to be matched.

4. A parameter matching and selection recommendation method for hybrid electric vehicles according to claim 3, characterized in that: When the target matching and selection system is a vehicle power matching and selection system, the corresponding target operating parameter is the maximum output power of the motor required under the three working conditions of the hybrid vehicle to be matched, and further includes: Calculating the maximum power of the motor of the hybrid vehicle to be matched according to the first power, the second power and the third power; The rated power of the motor of the hybrid vehicle to be matched is calculated in combination with the vehicle overload coefficient.

5. A parameter matching and selection recommendation method for hybrid electric vehicles according to claim 4, characterized in that: When the target matching and selection system is a vehicle power matching and selection system, and the corresponding target operating parameter is to meet the maximum output power of the hydraulic motor required during the acceleration process of the hybrid electric vehicle to be matched, it also includes: Calculating the maximum torque of the motor according to the rated speed and maximum power of the motor of the hybrid vehicle to be matched; Calculating the rated torque of the motor according to the rated speed and rated power of the motor of the hybrid vehicle to be matched; Obtaining the vehicle transmission efficiency, vehicle speed after acceleration, acceleration, frontal area, air resistance coefficient, rotational mass conversion coefficient, rolling resistance coefficient, vehicle curb weight and fuel cell accessory power consumption under the working condition of the hybrid vehicle to be matched, and calculating the first output power of the fuel cell; determining a second output power of the fuel cell based on the percentage of the output power accounted for by the fuel cell and the maximum power of the motor; Obtaining the maximum power of the fuel cell according to the first output power and the second output power of the fuel cell; Determine the parameters of the hydraulic pump motor, and calculate the first output power of the hydraulic motor according to the vehicle transmission efficiency, vehicle speed after acceleration, acceleration, frontal area, air resistance coefficient, rotational mass conversion coefficient, rolling resistance coefficient and vehicle curb weight under the working conditions of the hybrid vehicle to be matched; The maximum torque of the hydraulic motor is calculated by combining the maximum power rotation speed of the hydraulic motor and the maximum power of the motor.

6. A parameter matching and selection recommendation method for hybrid electric vehicles according to claim 5, characterized in that: When the target matching and selection system is an electric energy storage matching and selection system, the corresponding target operating parameters are the capacity of the fuel cell determined by the maximum power working time and the minimum thermal efficiency value of the fuel cell and the voltage and capacity of the power battery determined by the maximum power of the power battery and the voltage, internal resistance and capacity of a single battery, and also include: Based on the maximum output power P of the fuel cell fmax Determine the energy C required for the maximum operating time of the fuel cell f ; Based on the lower calorific value of the fuel, the maximum power of the fuel cell and the output efficiency of the fuel cell at the maximum power Determine the capacity of the fuel cell; Determine the parameters of the power battery pack based on the output power P of the power battery E . The ratio of the output power of the power battery is calculated by comparing it with the percentage of the output power of the fuel cell; Combined with the total efficiency of the power battery pack, the output power of the power battery is calculated; Determine the voltage, internal resistance and capacity of the selected single battery, and calculate the power and number of single batteries in the battery pack; According to the rated power of the motor, the commonly used motors for hybrid vehicles are determined, the motor voltage is determined, the number of single cells in series in the battery pack is obtained, and the total voltage is calculated based on the voltage of the selected single battery. The number of parallel-connected single-cell battery groups in the battery pack is obtained based on the number of single-cell batteries in the battery pack and the number of single-cell batteries connected in series. The capacity of the battery pack is obtained based on the number of single cells connected in parallel in the battery pack.

7. A parameter matching and selection recommendation method for hybrid electric vehicles according to claim 6, characterized in that: When the target matching and selection system is a hydraulic energy storage matching and selection system, the corresponding target operating parameters are the working pressure of the hydraulic accumulator determined by the driving speed of the hydraulic motor alone and the volume of the accumulator determined by satisfying the energy recovery of the regenerative braking of the hybrid vehicle to be matched, and also include: Determine the minimum working pressure and maximum working pressure of the hydraulic accumulator and the charging pressure of the accumulator according to the first output power of the hydraulic motor, the maximum vehicle speed in the hydraulic pump / motor single drive mode and the displacement of the hydraulic pump / motor; The volume V0 of the hydraulic accumulator is determined by meeting the energy recovery of the vehicle's regenerative braking, combining the initial braking speed of the vehicle, the variable process index of the gas, the maximum working pressure of the hydraulic accumulator, and the charging pressure of the accumulator.

8. A parameter matching and selection recommendation system for hybrid electric vehicles, characterized in that: include: one or more processors; A memory having one or more programs stored thereon, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement a parameter matching selection recommendation method for a hybrid electric vehicle according to any one of claims 1 to 7.

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