Range-increasing type electric vehicle transmission device with flywheel energy storage function

Abstract

The invention belongs to the field of electric vehicle engineering and relates to a range-increasing type electric vehicle transmission device with the flywheel energy storage function. The range-increasing type electric vehicle transmission device comprises a main power transmission system, a flywheel energy storage system and a vehicle-mounted charging system. The main power transmission system comprises a motor, a planet mechanism, a transmission and a main speed reducer. The flywheel energy storage system comprises a flywheel, a clutch, driven gears and a driving gear. The vehicle-mounted charging system comprises an internal combustion engine, an electric generator, a motor controller, an electric generator controller and an external charging interface. The planet mechanism comprises a sun gear, planet gears, a planet carrier, a gear ring and gear ring brakes. A flywheel is installed on a flywheel shaft. The planet carrier is connected with an output shaft of the planet mechanism. The gear ring is connected with the motor. An input shaft of the transmission is connected with the output shaft of the planet mechanism and an output shaft of the transmission is connected with an input shaft of the main speed reducer. The electric generator is connected with the internal combustion engine and the flywheel shaft. By the adoption of the range-increasing type electric vehicle transmission device with the flywheel energy storage function, the problems that an existing range-increasing type electric vehicle is low in braking energy recycling rate and the service life of a storage battery is short are solved.

Description

technical field [0001] The invention belongs to the field of electric vehicle engineering and relates to a range-extended electric vehicle transmission device with flywheel energy storage. Background technique [0002] The types of electric vehicles mainly include pure electric vehicles (Pure Electric Vehicle, PEV), hybrid electric vehicles (Hybrid Electric Vehicle, HEV) and fuel cell vehicles (Fuel Cell Electric Vehicle, FCEV). Among them, the extended-range electric vehicle is a pure electric drive electric vehicle with on-board and ground charging functions. The power system of an extended-range electric vehicle is mainly composed of a battery pack and battery management system, a main drive motor and controller, an engine and a generator system, etc. The battery pack can be charged by a ground charging pile or a vehicle charger, and the engine can be fuel-based or gas-fired. According to the operating conditions, it can operate in pure electric mode, extended range mode...

AI Technical Summary

Problems solved by technology

[0003] There are still some deficiencies in the above method: First, the vehicle only uses the charging method of the battery to recycle the kinetic energy in the braking process, and there are two conversions of energy forms, that is, mechanical energy-electrical energy-mechanical energy, which leads to energy loss and affects energy saving. efficiency; second, when the vehicle brakes and starts frequently, the battery is also in a state of repeated charging and discharging, which will have an adverse effect on the service life of the battery; third, when the car brakes in an emergency, the charging characteristics of the battery The limitation of electric energy recovery and storage is limited, so the efficiency of energy recovery and utilization is not high

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