Extended-range electric vehicle power system based on dual-power-source cooperative power generation

Abstract

The invention belongs to the field of new energy automobiles, particularly relates to an extended-range electric vehicle power system based on dual-power-source cooperative power generation, and provides the following scheme aiming at the problems that an existing extended-range electric vehicle is high in energy consumption and limited in cruising ability: a horizontally-opposed range extender and a double-spiral wind power range extender are designed and integrated; the double-spiral wind power range extender is driven to generate power through double effects of wind resistance collection and range extender tail gas thrust in the running process of a vehicle, and energy recovery and cooperative power supply are realized by combining the conventional power generation function of the horizontally-opposed range extender, so that the energy consumption of the whole vehicle is greatly reduced, and the energy consumption is reduced. And the use frequency of fossil fuel and battery electric energy of the vehicle is reduced in a pure green electricity application mode, so that the endurance performance is improved. Through estimation, the design can reduce the power consumption of a new energy car per hundred kilometers by 40-60% compared with a conventional car type, and has remarkable energy-saving and endurance advantages.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and in particular to a range-extended electric vehicle power system based on dual power source coordinated power generation, which is suitable for new energy vehicles with high requirements for energy consumption control and range capability. Background Technology

[0002] Range-extended electric vehicles (REEVs), as an important type of new energy vehicle, rely on onboard range extenders to generate electricity to charge the battery or directly power onboard electrical appliances, thus solving the range anxiety problem of pure electric vehicles. However, existing REEVs have the following technical shortcomings: First, the range extender only performs conventional power generation, and its exhaust energy is not effectively utilized, resulting in energy waste; second, the wind resistance generated during vehicle operation only exists as drag and does not achieve energy recovery; third, the vehicle's energy consumption per 100 kilometers is relatively high, and there is still room for optimization in the fuel consumption of conventional range extenders, which restricts the energy-saving performance and market competitiveness of REEVs; fourth, under the background of promoting "low-carbon and environmentally friendly" new energy vehicles, the use of energy has not yet achieved the application of "pure green energy".

[0003] Therefore, developing a collaborative power generation system that integrates wind resistance energy recovery and exhaust gas energy reuse has become a key direction for improving the energy efficiency of range-extended electric vehicles. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing range-extended electric vehicles, such as high energy consumption and limited range. The invention proposes a range-extended electric vehicle power system based on dual power source collaborative power generation. Through the collaborative design of a horizontally opposed range extender and a double-helix wind turbine range extender, it achieves wind resistance energy recovery and exhaust thrust utilization, reduces overall vehicle power consumption and fuel consumption, increases the penetration rate of pure green energy use, and thus improves range.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A range-extended electric vehicle power system based on dual-power-source collaborative power generation includes: Horizontal opposed range extender, twin-helix wind turbine range extender, air inlet assembly; The air inlet assembly is located at the front of the vehicle, and the rear end of the air inlet assembly is connected to the double-helix wind power range extender; the horizontally opposed range extender and the double-helix wind power range extender work together.

[0006] Preferably, the air inlet assembly is used to collect air and increase the airflow velocity, providing high-speed airflow for the dual-helix wind power extender.

[0007] Preferably, the horizontally opposed range extender is used for conventional power generation, and the exhaust gas generated during its operation can increase the operation of the twin-helix wind power range extender, thereby increasing its power generation.

[0008] Preferably, the dual-helix wind turbine receives the airflow generated by the wind resistance of the vehicle and the exhaust thrust of the horizontally opposed range extender to achieve dual-power drive for power generation.

[0009] Preferably, the air inlet assembly adopts a streamlined airflow guide design, which improves the airflow velocity through a narrowing structure.

[0010] Preferably, the dual-helix wind power range extender is located at the rear end of the air inlet assembly. The dual-helix wind power range extender includes a dual-helix fan, a generator, and a high-voltage electrical box. The dual-helix fan, generator, and high-voltage electrical box are connected in sequence, and the high-voltage electrical box is respectively connected to the vehicle's high-voltage load and power battery.

[0011] Preferably, the blade assembly of the twin-helix fan is aligned with the airflow output direction of the air collection port assembly, and is opposite to the exhaust port of the horizontally opposed range extender.

[0012] Furthermore, when the vehicle is running at a certain speed, the dual-helix wind power extender, in conjunction with the exhaust action of the horizontally opposed range extender, can ensure that the wind power input to the dual-helix wind power extender is not less than 9 kW.

[0013] Furthermore, the horizontally opposed range extender and the twin-helix wind turbine range extender form a collaborative power generation system. The exhaust gas emission path of the horizontally opposed range extender is directed toward the blade drive end of the twin-helix wind turbine range extender, and the high-pressure thrust of the exhaust gas is used to assist in driving the blade rotation.

[0014] The beneficial effects of the range-extended electric vehicle power system based on dual power source coordinated power generation in this invention are as follows: 1) Significant energy saving effect: The dual-helix wind power range extender recovers wind resistance to generate electricity and uses exhaust gas to assist in power generation, which can reduce the power consumption per 100 kilometers of new energy vehicles by 40%-60% compared with conventional models, greatly reducing the cost of use.

[0015] 2) Improved energy utilization: Recover and utilize two types of "waste energy"—wind resistance and exhaust gas—converting vehicle driving resistance and range extender exhaust thrust into electrical energy, thereby improving overall energy utilization.

[0016] 3) Enhanced range: The combined effect of increased power generation and reduced energy consumption effectively extends the range of range-extended electric vehicles.

[0017] 4) Compact structure: The air inlet, double helix wind power range extender, and horizontally opposed range extender are integrated into the front of the vehicle and the power compartment. The layout is compact, adaptable to the body structure of existing new energy vehicles, and easy to industrialize.

[0018] This invention achieves wind resistance energy recovery and exhaust thrust utilization through the synergistic design of a horizontally opposed range extender and a twin-helix wind turbine range extender, thereby reducing the vehicle's electricity and fuel consumption, increasing the penetration rate of pure green energy use, and thus improving driving range. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the electrical architecture of a range-extended electric vehicle power system based on dual power source collaborative power generation proposed in this invention. Figure 2 This is a schematic diagram of energy transfer in the dual-helix wind power range extender mode of a range-extended electric vehicle power system based on dual power source collaborative power generation proposed in this invention. Figure 3 This is a schematic diagram of energy transfer under the dual-power-source collaborative power generation mode of a range-extended electric vehicle power system based on dual-power-source collaborative power generation proposed in this invention. Figure 4 This is a flowchart illustrating the control strategy of a range-extended electric vehicle power system based on dual-power-source collaborative power generation, as proposed in this invention. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Example

[0021] Reference Figures 1-4 A range-extended electric vehicle power system based on dual-power source coordinated power generation mainly includes three parts: a horizontally opposed range extender, a double-helix wind turbine range extender, and a front air inlet assembly. The components work together to achieve dual-power generation. 1. Front air intake assembly The air inlet assembly is installed at the front of the electric vehicle and adopts a streamlined airflow guide design. It can efficiently collect air during vehicle operation and increase airflow speed through a narrowing structure, providing continuous and high-speed airflow input for the dual-helix wind turbine range extender and enhancing wind power generation efficiency.

[0022] 2-Hydraulic wind turbine range extender The dual-helix wind turbine range extender is located at the rear end of the air inlet assembly, with its blades aligned with the airflow output direction of the air inlet and opposite to the exhaust port of the horizontally opposed range extender. 1) When the vehicle is in motion, the high-speed wind resistance airflow collected by the air inlet drives the double helix blades to rotate, converting wind energy into electrical energy and realizing wind resistance energy recovery. 2) When the horizontally opposed range extender is running, the high-pressure exhaust gas generated by the engine is ejected from the exhaust port. The ejected gas acts on the double helical blades, and the blades are rotated by the exhaust gas thrust, which further increases the power generation.

[0023] 3 horizontally opposed range extenders The horizontally opposed range extender, as the core power generation unit, adopts a horizontally opposed structure design, featuring stable operation and high power generation efficiency. 1) Under normal operating conditions, the horizontally opposed range extender burns fossil fuels to generate electricity, which charges the vehicle's power battery or directly supplies the vehicle's electrical appliances; 2) The exhaust emission path is directionally designed to guide the high-pressure exhaust gas generated by combustion to the blades of the double-helix wind turbine, thereby realizing the secondary utilization of exhaust gas energy and avoiding energy waste.

[0024] Example: A power system structure for a range-extended electric vehicle based on dual-power source collaborative power generation. A streamlined air inlet assembly is installed at the original air intake and front grille of the vehicle. A dual-helix wind turbine range extender is connected to the rear end of the air inlet. A horizontally opposed range extender is arranged inside the vehicle's power compartment, with its exhaust pipe facing the blade drive end of the dual-helix wind turbine range extender. The pipe outlet is spaced slightly from the blade assembly to avoid installation interference and ensure that the exhaust thrust effectively acts on the blades. When the vehicle is in motion, the air inlet collects air to form a high-speed airflow, which drives the dual-helix blades to rotate and generate electricity. Simultaneously, the horizontally opposed range extender starts generating electricity, and its exhaust gas is ejected. The ejected exhaust gas, combined with the airflow, acts on the blades of the dual-helix wind turbine range extender, thereby increasing the output power. Data analysis shows that when a vehicle travels 100km under certain conditions, the dual-helix wind-powered range extender can recover approximately 7kWh of electrical energy. The remaining electrical energy required for the vehicle's operation can be supplemented by the horizontally opposed range extender. At this point, the vehicle's original energy consumption of 14kWh per 100km can be reduced to 6.5kWh.

[0025] Basic control strategy: A range-extended electric vehicle power system based on dual-power-source collaborative power generation utilizes the airflow generated by the vehicle's movement as the dual-helix wind turbine operates. This airflow cannot be actively controlled to change its magnitude. Furthermore, for a given model of dual-helix wind turbine, its wind-receiving area is fixed. Therefore, by determining the wind speed entering the turbine, the turbine's output power at that speed can be accurately calculated. Since wind speed is positively correlated with turbine rotational speed, and the turbine and generator are directly connected, the generator's rotational speed is also positively correlated with wind speed.

[0026] Before system control, the dual-helix wind turbine range extender needs to be calibrated based on the following parameters: wind speed n1 - turbine speed n2 - generator speed n3 - output torque T1 - output power P1. For example, at a wind speed of 10 m / s, the maximum turbine speed n2 is 500 rpm, and the corresponding generator speed n3 is 500 rpm. Then, by carefully calibrating the value of "output torque T1", the maximum torque value that allows the system to operate stably can be found, thereby obtaining the actual maximum output power P1 of the system at that wind speed.

[0027] The calibration process is repeated under different wind speeds to obtain a detailed "wind speed-speed-torque-power" table. The discrete calibration table is then fitted to find the "speed-power" curve. When the vehicle is in motion, the generator receives a real-time speed reading. The control system then uses the calibrated curve to find the maximum output power value at that moment, and then calculates the power using the power calculation formula. To calculate the real-time torque value that can be output under real-time wind speed.

[0028] When the vehicle controller detects driver behavior based on collected information and calculates the power required by the vehicle, it sends this power value to the control system of the dual-helix wind turbine via the vehicle's CAN bus. The control system then controls the wind turbine's operation based on the difference between the maximum power output of the turbine and the power required by the vehicle. 1) When the output power of the wind turbine range extender is greater than or equal to the power required by the vehicle, the control system of the wind turbine range extender will inform the horizontally opposed range extender that it does not need to work. At this time, the target power is the power required by the vehicle, and the corresponding torque value is matched to make the generator of the wind turbine range extender work.

[0029] 2) When the output power of the wind turbine range extender is less than the power required by the vehicle, the wind turbine range extender's control system will inform the horizontally opposed range extender of its maximum output power at that time, and operate at that maximum output power. The horizontally opposed range extender's control system calculates the difference between the vehicle's power requirement and the wind turbine range extender's output power, and uses this difference as the target power to control the horizontally opposed range extender's operation.

[0030] Industrial Applicability: The range-extended electric vehicle power system structure described in this invention integrates the synergistic power generation functions of a horizontally opposed range extender and a twin-helix wind turbine range extender, achieving the recovery and utilization of wind resistance and exhaust energy, significantly reducing overall vehicle energy consumption and improving range. Its structural layout is compatible with existing new energy vehicle body designs, requiring no large-scale modification of production lines, and possesses clear prospects for industrial application. It can be widely used in the research and development and production of various range-extended new energy vehicles.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A range-extended electric vehicle power system based on dual-power source coordinated power generation, characterized in that, include: Horizontal opposed range extender, twin-helix wind turbine range extender, air inlet assembly; The air inlet assembly is located at the front of the vehicle, and the rear end of the air inlet assembly is connected to the double-helix wind power range extender; the horizontally opposed range extender and the double-helix wind power range extender work together.

2. The range-extended electric vehicle power system based on dual power source coordinated power generation according to claim 1, characterized in that, The air inlet assembly is used to collect air and increase airflow speed, providing high-speed airflow for the twin-helix wind turbine range extender.

3. The range-extended electric vehicle power system based on dual power source coordinated power generation according to claim 2, characterized in that, The horizontally opposed range extender is used for conventional power generation, and the exhaust gas generated during its operation can increase the operation of the twin-helix wind power range extender, thereby increasing its power generation.

4. The range-extended electric vehicle power system based on dual power source coordinated power generation according to claim 3, characterized in that, The dual-helix wind turbine range extender receives airflow generated by the wind resistance of the vehicle and the exhaust thrust of the horizontally opposed range extender, achieving dual-power drive for power generation.

5. The range-extended electric vehicle power system based on dual power source coordinated power generation according to claim 4, characterized in that, The air inlet assembly adopts a streamlined airflow guide design, which improves the airflow speed through a narrowing structure.

6. The range-extended electric vehicle power system based on dual power source coordinated power generation according to claim 5, characterized in that, The dual-helix wind power range extender is located at the rear end of the air inlet assembly. The dual-helix wind power range extender includes a dual-helix fan, a generator, and a high-voltage electrical box. The dual-helix fan, generator, and high-voltage electrical box are connected in sequence, and the high-voltage electrical box is connected to the vehicle's high-voltage load and power battery, respectively.

7. A range-extended electric vehicle power system based on dual-power source coordinated power generation according to claim 6, characterized in that, The blade assembly of the twin-helix fan is aligned with the airflow output direction of the air inlet of the air inlet assembly, and is opposite to the exhaust port of the horizontally opposed range extender.

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