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Electric vehicle power following device and control method

A power-following, electric vehicle technology, applied in electric vehicles, electromechanical devices, electric components, etc., can solve the problems of low power battery life and high power loss of range extenders, and achieve the effects of small battery capacity, light weight and low emissions

Active Publication Date: 2018-08-21
ZHEJIANG GEELY HOLDING (GROUP) 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 the range extender in the prior art, such as the high power loss and the low service life of the power battery, and provide a power follower device for electric vehicles as the main energy source, and the power battery as the auxiliary backup energy source for electric vehicles. Follower device and control method

Method used

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  • Electric vehicle power following device and control method
  • Electric vehicle power following device and control method
  • Electric vehicle power following device and control method

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Embodiment 1

[0048] Such as figure 1 The illustrated embodiment is a power following device 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 driving motor controller is electrically connected with the driving motor; the electric vehicle power following device includes an engine 6, a generator 7, a rectifier 8 and a main controller 9 arranged on the electric vehicle; the engine is connected to the generator through a connecting mechanism The generator is electrically connected to the rectifier, and both the rectifier and the power battery are electrically connected to the drive motor controller for converting direct current into alternating current. The main controller communicates with the electronic accelerator pedal, the engine controller, a...

Embodiment 2

[0073] 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:

[0074] 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;

[0075] When the main controller detects through the power battery controller that the current SOC state parameter of the power battery reaches 85%, after a delay time T, return to step 100 .

[0076] In this embodiment, SOC1 is 18%.

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Abstract

The invention discloses a power following device of an electric automobile and a controlling method of the power following device. The power following device comprises an engine, an electric generator, a rectifier and a main controller, wherein the engine is connected with the electric generator through a connecting mechanism; the electric generator is electrically connected with the rectifier; the rectifier and a power battery are respectively and electrically connected with a driving motor controller, wherein the driving motor controller is used for converting direct current into alternating current; the main controller is respectively and electrically connected with an electronic accelerator pedal, an engine controller, a power battery controller, the rectifier and the driving motor controller through CAN buses. The power following device of the electric automobile and the controlling method of the power following device disclosed by the invention have the characteristics that range extension of power following characteristics is realized, the capacity of the power battery is reduced, the weight of the power battery and the cost of the power battery are reduced, the using frequency of the power battery is reduced, and the service life of the power battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle power following device and a control method which use a power following device as a main energy source and a power battery as an auxiliary backup energy source. 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. Th...

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 HOLDING (GROUP) CO LTD
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