Range-extended electric vehicle power device and control method

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A technology of electric vehicles and power devices, applied in the direction of electric power devices, power devices, motor vehicles, etc., can solve the problems of low effective work efficiency, high comprehensive fuel consumption, poor power, etc., and achieve high effective work efficiency, low comprehensive fuel consumption, The effect of less energy loss

Active Publication Date: 2018-03-20

ZHEJIANG GEELY HLDG GRP CO LTD

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Problems solved by technology

[0007] The purpose of the invention is to overcome the disadvantages of poor power, low effective work efficiency and high comprehensive fuel consumption of single follower electric vehicles in the prior art, and provide a power follower as the main energy source, and the power battery as the auxiliary backup energy source Extended range electric vehicle power device and control method

Method used

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Embodiment 1

[0048] Such as figure 1 The illustrated embodiment is a power plant for an extended-range electric vehicle, including a power battery pack 1, a first engine 2, a first generator 3, a second engine 4, a second generator 5, a drive system 6, and a vehicle control system. 7, battery management chip 8, DC buck 9, power distribution unit 10, speed reducer 11 and inverter 12; the first engine is connected to the first generator through the connection mechanism, and the second engine is connected to the second generator through the connection mechanism. Generator connection, the first generator and the second generator are electrically connected to the inverter, and the power distribution unit is respectively electrically connected to the drive system, DC step-down converter, inverter, power battery pack and vehicle controller; The vehicle controller is electrically connected to the battery management chip, drive system, power distribution unit, DC voltage reducer, first engine and sec...

Embodiment 2

[0066] Embodiment 2 includes all the structures and steps in Embodiment 1. The vehicle controller cyclically detects the dischargeable power P4 of the power battery pack, and the vehicle controller is provided with a lower limit value of the dischargeable power;

[0067] In embodiment 2, when the SOC value state parameter in embodiment 1

[0068] In Embodiment 2, the state parameter when the SOC value≥A in Embodiment 1 is replaced by when the dischargeable power≥P4.

[0069] When the vehicle is running at a constant speed and the driving speed is greater than or equal to 60kph, the vehicle controller controls the rotors of the first generator and the second generator to work at the same time at a speed of 1200rpm and a torque of 140Nm.