Power system of range extended electric vehicle and energy control method of power system

Abstract

The invention discloses a power system of a range extended electric vehicle and an energy control method of the power system. The power system comprises an engine, a battery system, a plurality of accessory systems, a power generation unit and an electronic control unit. Each accessory system comprises a mechanical driving interface and a power driving interface; and each mechanical driving interface corresponds to an accessory clutch, and / or the multiple mechanical driving interfaces correspond to the accessory clutch. The accessory systems are in action force connection with or separation from the engine through the accessory clutch, and the power driving interfaces correspond to a relay; and the accessory systems are electrically connected with or separated from the battery system through the relay. Meanwhile, the accessory systems run by selecting the corresponding driving interfaces. The power generation unit is electrically connected with the battery system and is in action force connection with or separation from the engine. The electronic control unit comprises the accessory clutch, the staring / power generation clutch and the relay, and the accessory clutch, the staring / power generation clutch and the relay monitor vehicle states and are electrically connected and controlled.

Description

technical field [0001] The present invention relates to a power system of a Range Extended Electric Vehicle (REEV) and its energy control method, in particular to a power system of a vehicle accessory system using an engine and a battery combined with an electromechanical dual drive interface and control methods. Background technique [0002] Such as figure 1 Shown is US Patent No. US7954580 which discloses an electric hybrid system 10 with an accessory drive system 11. When the engine 12 is turned off, a Belt-Alternator-Starter (BAS) system 13 passes through a driven pulley 14 and many Flywheels (15, 15') and belts 16 transmit torque and energy to each accessory system (17, 17') to ensure proper operation; when the engine is shut down, the engine intake can be controlled by the controller 18 It is a technical solution to reduce the resistance when the belt generator starting system 13 drives the accessory system (17, 17') to run with the switch of the air outlet valve 19,...

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