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Method for controlling range extender of extended-range electric vehicle

An electric vehicle and range extender technology, applied in electric vehicles, control drive, electric traction, etc., can solve the problems of not being able to satisfy the power, economy, and practicability of the whole vehicle at the same time, so as to meet the power, guarantee economical effect

Inactive Publication Date: 2014-06-25
TIANJIN QINGYUAN ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many types of range extender control methods, but most of them are still in the theoretical exploration, not mature enough, and not very practical. Only the thermostat control method has been widely used. However, in this control method, the range extender always works at At the constant power point, the power and economy of the vehicle cannot be satisfied at the same time

Method used

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  • Method for controlling range extender of extended-range electric vehicle
  • Method for controlling range extender of extended-range electric vehicle
  • Method for controlling range extender of extended-range electric vehicle

Examples

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Embodiment 1

[0049] In this embodiment, a certain type of battery is selected, and the current SOC of the power battery pack 2 is set to 60%, its highest threshold value is 75%, the lowest threshold value is 35%, and the extremely low threshold value is 15%; a certain type of extended range is selected According to the performance of range extender 1, its three stable power points are set as K1<K2<K3 respectively.

[0050] The vehicle controller 11 initializes, powers on, collects and processes signals, and judges the driving mode.

[0051] like image 3 As shown, when the vehicle controller 11 collects that the SOC of the power battery is 60%, which is lower than the maximum threshold value of 75%, it is allowed to turn on the range extender 1 through the indicator button. If the driver presses the indicator button, the When the range extender 1 is not turned on, the start and stop flag of the range extender 1 is flag=1, and the range extender 1 is started. After the range extender 1 is ...

Embodiment 2

[0053] This embodiment differs from the first embodiment only in the current SOC of the traction battery pack 2 . In this embodiment, the current SOC of the traction battery pack 2 is set to be 13%, and the other settings are the same as in the first embodiment.

[0054] like figure 2 As shown, when the vehicle controller 11 collects that the current SOC of the traction battery 2 is 13% and the current range extender 1 is activated. First, the SOC is lower than the maximum threshold value, then the system allows the range extender 1 to be turned on through the indicator button and enters the subroutine for the driver to manually switch the range extender 1 through the indicator button, during which it is assumed that the driver does not perform any operation on the indicator button; The vehicle controller 11 continues to detect that the SOC is less than the minimum threshold value, then controls the range extender 1 to start and run at 23KW power, and detects that the SOC is ...

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Abstract

The invention discloses a method for controlling a range extender of an extended-range electric vehicle. The method includes: (1) when an electrical charge state, of a power storage battery pack, collected by a vehicle control unit is higher than the highest threshold value, the whole extended-range electric vehicle is controlled to enter a pure electric operation mode to end a procedure by the vehicle control unit, or the step (2) is executed; (2) when the electric charge state is lower than the highest threshold value, a driver is allowed to manually turn on the range extender via an indicator lamp button; (3) when the electric charge state is lower than the lowest threshold value and the range extender is not turned on manually, the range extender is controlled to start automatically; (4) when the electric charge state is higher than the lowest threshold value, the driver is allowed to turn on or turn off the range extender manually via the indicator lamp button; but after the electric charge state is lower than the lowest threshold value, the driver is not allowed to turn off the range extender via the indicator lamp button, at this time, the ranger extender works at the point with maximum power, and the whole extended-range electric vehicle is in a power-limited state. The method for controlling the range extender of the extended-range electric vehicle is capable of meeting requirements on dynamic property and economy of the whole extended-range electric vehicle.

Description

technical field [0001] The invention relates to the technical field of control of a range extender in an extended-range electric vehicle, in particular to a control method for the range extender in an extended-range electric vehicle. Background technique [0002] With the widespread promotion of electric vehicles, the mileage of electric vehicles has become the focus of people's attention. However, the high cost and low life of batteries hinder the development of electric vehicles, and the emergence of extended-range electric vehicles has greatly eased the People are anxious about the driving range. It is to install a range extender on the car that can increase the driving range. When the battery power is sufficient, the range extender does not start, and the vehicle runs in pure electric form. When the battery power is insufficient, The range extender is turned on, and it is used as the power source of the whole vehicle together with the battery. It can be seen from this th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18B60L15/00
CPCY02T10/70
Inventor 石立霞李磊周能辉杜森
Owner TIANJIN QINGYUAN ELECTRIC VEHICLE
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