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Control method of electric vehicle power follower

A power follower, electric vehicle technology, applied in electric vehicles, electric components, control mechanical energy, etc., can solve the problems of high power loss of range extenders, low power battery life, etc., and achieve light weight, small battery capacity, and low emissions. Effect

Active Publication Date: 2017-10-31
ZHEJIANG GEELY HLDG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of high power loss and low power battery life of the range extender in the prior art, and provide a power follower for electric vehicles as the main energy source and the power battery as the auxiliary backup energy source for electric vehicles. Follower and its control method

Method used

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  • Control method of electric vehicle power follower
  • Control method of electric vehicle power follower
  • Control method of electric vehicle power follower

Examples

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Embodiment 1

[0047] Such as figure 1 The illustrated embodiment is a power follower for an electric vehicle. The electric vehicle includes a drive motor 1 for driving the vehicle, a drive motor controller 2, a power battery 3, a power battery controller 4 and an electronic accelerator pedal 5; the power battery and the power The battery controller is electrically connected, and the drive motor controller is electrically connected with the drive motor; the electric vehicle power follower includes an engine 6, a generator 7, a rectifier 8, a main controller 9 and an acceleration sensor 30 arranged on the electric vehicle; The mechanism is connected to the generator, the generator is electrically connected to the rectifier, the rectifier and the power battery are both electrically connected to the drive motor controller for converting direct current into alternating current, and the main controller communicates with the acceleration sensor, electronic accelerator pedal, Engine controller, pow...

Embodiment 2

[0071] All structures and steps in embodiment 2 are the same as in embodiment 1, and step 200 of embodiment 1 is replaced by the following steps:

[0072] The main controller also has a charging threshold SOC1. The controller loops to check and detect the current SOC state parameter output by the power battery controller. When the SOC state parameter obtained by the query is e >Vehicle required power Rectifier output power P e Moderately exceeds the required power of the vehicle The power is used to charge the power battery;

[0073] When the main controller detects that the current SOC state parameter of the power battery ≥ A through the power battery controller, after a delay time T, return to step 100 .

[0074] In this embodiment, SOC1 is 18%.

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Abstract

The invention provides an electric vehicle power follower and a control method thereof. The electric vehicle power follower comprises an engine, a generator, a rectifier, a main controller and an acceleration sensor, which are arranged on an electric vehicle. The engine is connected with the generator through a connecting mechanism. The generator is electrically connected with the rectifier. The rectifier and a power battery are electrically connected with a driving motor controller used for converting direct current electricity to alternating current electricity. The main controller is electrically connected with the acceleration sensor, an electronic throttle pedal, an engine controller, a power battery controller, the rectifier and the driving motor controller through a CAN bus. The electric vehicle power follower achieves range extension of power following characteristics, reduces the capacity of the power battery, reduces the weight and the cost of the power battery, reduces the using frequency of the power battery, prolongs the service life of the power battery, reduces the total amount of charging of the power battery by the rectifier, reduces the total amount of discharge of the power battery and the reduces the energy loss of charge and discharge of the power battery.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle power follower with a power follower as a main energy source and a power battery as an auxiliary backup energy source and a control method thereof. Background technique [0002] At present, the fuel consumption and emission requirements of vehicles are becoming more and more stringent. There have been extended-range electric vehicles on the market to reduce vehicle fuel consumption and reduce vehicle emissions. The energy supply of this extended-range electric vehicle is mainly based on power batteries. , the power battery required is large in capacity and heavy in weight. The range extender is used as an auxiliary energy source. When the SOC of the power battery is less than a certain value, the range extender charges the power battery. The engine in the range extender works at one or several fixed speed points with high efficiency. The range exten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/12H02K7/18B60L50/15
CPCY02T10/64Y02T10/70Y02T10/72
Inventor 蔡文远童国庆
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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