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Range-extended electric vehicle power device and control method

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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Range-extended electric vehicle power device and control method
  • Range-extended electric vehicle power device and control method

Examples

Experimental program
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Effect test

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<A is replaced by when the dischargeable power<P4;

[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.

Embodiment 3

[0071] Embodiment 3 includes all the structures and method parts in Embodiment 1. Embodiment 3 also includes an alarm, a memory and a temperature sensor located on the casing of the power battery pack. The alarm, memory and each temperature sensor are all connected with the vehicle control Appliance electrical connection; also includes the following steps:

[0072] (7-1) The vehicle controller reads the temperature signal u(t) detected by the temperature sensor, sets the initial value of j to 1, and sets the initial value of i to 1; the fault threshold E is set in the memory;

[0073] (7-2) Calculate the local maximum value of u(t) and obtain the upper envelope u through cubic spline interpolation up (t);

[0074] (7-3) Calculate the local minimum of the signal u(t) and obtain the lower envelope u through cubic spline interpolation low (t);

[0075] (7-4) Define the mean envelope m 1 (t)=[u up (t)+u low (t)] / 2;

[0076] (7-5) Using the formula h j (t)=u(t)-m j (t) Cal...

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Abstract

The invention discloses a range expanding type electric automobile power device and a control method. The range expanding type electric automobile power device comprises a power battery pack, a first engine, a first power generator, a second engine, a second power generator, a drive system, a whole automobile controller, a battery management chip, a direct current voltage reducer, a power distribution unit, a speed reducer and an inverter. The first engine is connected with the first power generator through a connecting mechanism. The second engine is connected with the second power generator through a connecting mechanism. Both the first power generator and the second power generator are electrically connected with the inverter. The power distribution unit is electrically connected with the drive system, the direct current voltage reducer, the inverter, the power battery pack and the whole automobile controller. The range expanding type electric automobile power device has the beneficial effects that the dynamic performance is higher, the device is suitable for more automobile types, the effective work efficiency of the engines is high, the comprehensive oil consumption is low, and the use cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a range-extended electric vehicle power device and a control method using multiple power followers. Background technique [0002] At present, new energy vehicles adopt a distributed power system, and its power source adopts a single follower system. Single-follower electric vehicles have the following disadvantages: [0003] (1) The power of the car is insufficient, the driving experience is poor, there are few applicable models, and the market promotion is difficult. [0004] (2) The effective working efficiency of the engine is low, the comprehensive fuel consumption is high, and the use cost is high; [0005] (3) Difficult vehicle layout, low mechanical transmission efficiency, and poor power performance cannot meet the complex use environment of the vehicle. [0006] Chinese Patent Authorization Publication No.: CN104477166A, authorized publication date November ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W20/13B60W10/06B60W10/08B60K1/02
CPCB60K1/02B60W10/06B60W10/08Y02T10/62
Inventor 宋杨宋光辉崔俊博
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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