阅读说明：本技术 一种新能源汽车用增程器及控制方法 (range extender for new energy automobile and control method ) 是由 陆祖荣 杨继勇 于 2019-09-16 设计创作，主要内容包括：本发明公开了一种新能源汽车用增程器,属于新能源汽车的技术领域,旨在提供一种可延长新能源汽车行程的增程器,其技术方案要点是包括发电单元和增程器控制系统,所述发电单元包括发动机、燃油系统和永磁同步发电机,所述发动机的驱动轴连接永磁同步发电机,永磁同步发电机外接车辆自带电池包并联接入车辆的电机。解决了原有新能源车电池续航能力有限、充电麻烦、充电桩分布有限,遇到特殊情况需要增加行程,但电池续航不够难以补充、电池损坏后无法应急等问题。本发明公开了一种增程器的控制方法,属于新能源汽车的技术领域。(The invention discloses a range extender for a new energy automobile, belongs to the technical field of new energy automobiles, and aims to provide a range extender capable of extending the stroke of the new energy automobile. The problems that the battery endurance of an original new energy vehicle is limited, the charging is troublesome, the distribution of charging piles is limited, the stroke needs to be increased when special conditions are met, the battery endurance is difficult to supplement, and emergency cannot be achieved after the battery is damaged are solved. The invention discloses a control method of a range extender, and belongs to the technical field of new energy automobiles.)

1. The utility model provides a new energy automobile is with increasing journey ware which characterized in that: the system comprises a power generation unit and a range extender control system, wherein the power generation unit comprises an engine, a fuel system and a permanent magnet synchronous generator, a driving shaft of the engine is connected with the permanent magnet synchronous generator, and the permanent magnet synchronous generator is externally connected with a vehicle self-contained battery pack and is connected with a motor of the vehicle in parallel;

The range extender control system comprises a power generation power demand module, a state management module, an engine output power demand module, a range extender working mode selection module, an engine control module and a generator control module;

The output end of the generating power demand module is connected to the input end of the state management module and the input end of the engine input power demand module; the output end of the state management module is connected with the input end of the engine control module and the input end of the generator control module; the output end of the engine output power demand module is connected to the input end of the engine control module and the input end of the generator control module; the output end of the range extender working mode selection module is connected to the input end of the engine control module and the input end of the generator control module.

2. The range extender for the new energy automobile according to claim 1, characterized in that: the range extender further comprises a warm air water pump connected with the engine and a warm air blower connected with the warm air water pump and arranged in a vehicle compartment, the warm air blower is further connected with the engine, and the warm air blower is connected with a central control panel of the vehicle.

3. The range extender for the new energy automobile according to claim 2, characterized in that: the warm air blower is provided with a plurality of warm air outlets in a vehicle compartment.

4. A range extender control method as set forth in claim 3, wherein:

the power generation power demand module receives the energy demand of the whole vehicle, and obtains the output electric power demand value of the range extender system through conversion calculation; the output electric power demand value of the range extender system is input into a state management module and an engine output power demand module;

The state management module determines the current working state of the range extender according to the input signal of the range extender control system, the whole vehicle control request signal and the output electric power demand of the range extender system; the working state of the range extender is input into the engine control module and the generator control module;

The engine output power demand module determines an engine output power demand according to the output electric power demand of the range extender system and the working efficiency of the generator; determining the target rotating speed and the target torque of the engine according to the output power requirement of the engine and the optimal working path of the engine; inputting the target rotating speed and the target torque of the engine to the engine control module and the generator control module;

The range extender working mode selection module sets a range extender working mode and inputs the range extender working mode to the engine control module and the generator control module;

the engine control module determines an engine target instruction according to the working state of the range extender, the target rotating speed and the target torque of the engine work and the working mode of the engine;

The generator control module determines a generator target instruction according to the working state of the range extender, the target rotating speed and the target torque of the engine and the working mode of the generator.

5. the range extender control method of claim 4, wherein: the state management module further comprises a battery active equalization submodule, and when the permanent magnet synchronous generator charges the battery pack, the battery active equalization submodule transfers energy between the battery cores exceeding the set pressure difference so as to balance influences brought by the pressure difference.

6. The range extender control method of claim 5, wherein: the distance increasing device adopts small current I balance for charging, the power of the generator is adjusted through the battery active balance submodule according to the running condition of the vehicle, the discharging amount of a battery pack is reduced, and the small current I balance charging is realized.

7. The range extender control method of claim 6, wherein: the small current I is 2A.

8. The range extender control method of claim 7, wherein: and a voltage and current acquisition loop is adopted to control a power supply system in a real-time closed-loop manner, so that the transferred energy can be adjusted in real time by a feedback signal.

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to a range extender for a new energy automobile and a control method.

Background

with the development of economic technology and the continuous innovation of technology, the development of new energy electric automobiles is highly valued by various national governments and is rapidly developed.

at present new forms of energy electric automobile mainly takes to fill electric pile and charges that charges, and the defect of its existence: firstly, the battery has limited cruising ability and is troublesome to charge; secondly, charging piles are limited in distribution, and when special conditions are met, the travel needs to be increased, but the battery endurance is not enough and is difficult to supplement; and thirdly, the emergency can not be realized after the battery is damaged.

disclosure of Invention

The invention aims to provide a range extender for a new energy automobile, which has the advantage of prolonging the range of the new energy automobile.

the technical purpose of the invention is realized by the following technical scheme:

A range extender for a new energy automobile comprises a power generation unit and a range extender control system, wherein the power generation unit comprises an engine, a fuel system and a permanent magnet synchronous generator;

the range extender control system comprises a power generation power demand module, a state management module, an engine output power demand module, a range extender working mode selection module, an engine control module and a generator control module;

The output end of the generating power demand module is connected to the input end of the state management module and the input end of the engine input power demand module; the output end of the state management module is connected with the input end of the engine control module and the input end of the generator control module; the output end of the engine output power demand module is connected to the input end of the engine control module and the input end of the generator control module; the output end of the range extender working mode selection module is connected to the input end of the engine control module and the input end of the generator control module.

By adopting the technical scheme, the engine is started when the stored electric quantity of the battery pack of the original vehicle is insufficient or the power of the battery pack of the original vehicle driving the vehicle is insufficient, and the permanent magnet synchronous generator is driven to provide electric energy for the motor driving the vehicle. The battery pack of the vehicle is prevented from being charged under the condition that the cruising ability of the primary battery pack is not enough.

Furthermore, the range extender further comprises a warm air water pump connected with the engine and a warm air blower connected with the warm air water pump and arranged in a compartment of the vehicle, the warm air blower is further connected with the engine, and the warm air blower is connected with a central control panel of the vehicle.

By adopting the technical scheme, the warm air water pump heats water through the engine, and then supplies heat to the interior of the vehicle compartment through the warm air blower, and does not use electric energy to supply heat to the warm air blower, so that the use of electric energy is reduced. The warm air blower and the warm air water pump realize the heating to the interior of the automobile according to the requirement, when the outdoor temperature is low, the heat energy of the charging system is utilized to drive the warm air in the automobile, the energy is further saved, the heavy current discharge of the battery at low temperature is avoided, the service life of the battery is prolonged, and the risk of the low-temperature discharge failure of the battery is reduced

Furthermore, the warm air blower is provided with a plurality of warm air outlets in a vehicle compartment.

Through adopting above-mentioned technical scheme, a plurality of warm braw exports evenly arrange in the vehicle carriage for the temperature in the vehicle carriage is more even.

the second purpose of the invention is to provide a control method of the range extender for the new energy automobile, which has the advantage of being capable of prolonging the range of the new energy automobile.

The technical purpose of the invention is realized by the following technical scheme:

A control method of the range extender is provided,

the power generation power demand module receives the energy demand of the whole vehicle, and obtains the output electric power demand value of the range extender system through conversion calculation; the output electric power demand value of the range extender system is input into a state management module and an engine output power demand module;

The state management module determines the current working state of the range extender according to the input signal of the range extender control system, the whole vehicle control request signal and the output electric power demand of the range extender system; the working state of the range extender is input into the engine control module and the generator control module;

The engine output power demand module determines an engine output power demand according to the output electric power demand of the range extender system and the working efficiency of the generator; determining the target rotating speed and the target torque of the engine according to the output power requirement of the engine and the optimal working path of the engine; inputting the target rotating speed and the target torque of the engine to the engine control module and the generator control module;

The range extender working mode selection module sets a range extender working mode and inputs the range extender working mode to the engine control module and the generator control module;

The engine control module determines an engine target instruction according to the working state of the range extender, the target rotating speed and the target torque of the engine work and the working mode of the engine;

The generator control module determines a generator target instruction according to the working state of the range extender, the target rotating speed and the target torque of the engine and the working mode of the generator.

Through adopting above-mentioned technical scheme, will increase journey ware and new energy automobile adaptation and use, solved original new energy automobile battery duration limited, the trouble of charging, fill electric pile distribution limited, meet the special circumstances and need increase the stroke, nevertheless battery duration is difficult to supply inadequately, the battery can't meet an urgent need the scheduling problem after damaging.

further, the state management module further comprises a battery active equalization submodule, and when the permanent magnet synchronous generator charges the battery pack, the battery active equalization submodule transfers energy between the battery cores exceeding a set pressure difference so as to balance influences caused by the pressure difference.

By adopting the technical scheme, the battery balance is realized by a real-time voltage and current control loop through a high-frequency transformer isolation conversion technology, the heating and electrolyte boiling evaporation consumption caused by over-discharge and over-charge of the battery of the electric car are avoided, and the battery is always kept in the optimal use state.

furthermore, the range extender is charged by adopting small current I balance, the power of the generator is adjusted by the battery active balance submodule according to the running condition of the vehicle, the discharge capacity of the battery pack is reduced, and the small current I balance charging is realized.

By adopting the technical scheme, the small current equalizing charge reduces the heat of battery charging and prolongs the service life of the battery.

Further, the small current I is 2A.

by adopting the technical scheme, the 2A current is not too large to damage the vehicle battery pack, and the balance condition is met.

Furthermore, a voltage and current acquisition loop is adopted to control the power supply system in a real-time closed-loop manner, so that the transferred energy can be adjusted in real time by the feedback signal.

By adopting the technical scheme, the voltage and current acquisition precision is higher, and the damage to the circuit caused by overlarge current and voltage floating when the battery is charged is avoided.

In conclusion, the invention has the following beneficial effects:

1. The problems that the battery endurance of the original new energy vehicle is limited, the charging is troublesome, the distribution of charging piles is limited, the travel needs to be increased under special conditions, the battery endurance is not enough and is difficult to supplement, and emergency cannot be realized after the battery is damaged are solved;

2. The warm air blower and the warm air water pump realize heating to the interior of the automobile as required, when the outdoor temperature is low, the heat energy of the charging system is utilized to drive the warm air in the automobile, so that the energy is further saved, the heavy current discharge of the battery at low temperature is avoided, the service life of the battery is prolonged, and the risk of the low-temperature discharge failure of the battery is reduced.

drawings

FIG. 1 is a system block diagram of a range extender in embodiment 1;

FIG. 2 is a system block diagram of a power generation unit in embodiment 1;

FIG. 3 is a schematic view of the intake of warm air in embodiment 1;

Fig. 4 is a system block diagram of a range extender control system in embodiment 1.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.