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Electric vehicle sliding energy recovery control method

An energy recovery, electric vehicle technology, applied in electric vehicles, control devices, electric braking systems, etc., can solve the problems of adjusting the power of coasting energy recovery, single recovery method, etc., to improve the utilization rate and improve the power of coasting energy recovery. Effect

Pending Publication Date: 2020-07-24
江西精骏电控技术有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing coasting energy recovery strategies only control the amount of energy recovery based on the vehicle speed when the vehicle is coasting. Utilization of sliding kinetic energy

Method used

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  • Electric vehicle sliding energy recovery control method
  • Electric vehicle sliding energy recovery control method
  • Electric vehicle sliding energy recovery control method

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Embodiment Construction

[0025] next combined with figure 1 A specific embodiment of the present invention is described in detail.

[0026] A method for recovering energy recovery from electric vehicle coasting, which is accomplished through the following existing systems on the vehicle:

[0027] Driving state perception system, including speed sensor and torque sensor, respectively obtain the real-time speed u and driving torque T of the whole vehicle;

[0028] The environmental perception system includes at least a wind speed sensor, a wind direction sensor, a friction sensing system between tires and the ground, and a gyroscope, which respectively obtain the current wind speed v, wind direction n, tire rolling resistance coefficient f, and the inclination of the vehicle body, that is, the current slope α;

[0029] The battery module provides the power source for the whole vehicle and recovers energy in the sliding state;

[0030] The vehicle controller is connected with the driving state sensing ...

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Abstract

An electric vehicle sliding energy recovery control method comprises the following steps: establishing a whole vehicle longitudinal kinetic equation; acquiring current vehicle and environment parameters; obtaining a reference horizontal acceleration, and according to the obtained parameters and the longitudinal kinetic equation, obtaining the horizontal acceleration of the whole vehicle; obtainingthe current actual acceleration of the whole vehicle; and outputting an energy recovery strategy value, carrying out difference operation on the obtained reference horizontal acceleration and the current actual acceleration of the whole vehicle, if the difference is greater than a preset threshold in a whole vehicle controller, judging that the current whole vehicle is in a downhill state and reaches a state capable of carrying out energy recovery, and outputting the energy recovery strategy value. Under the condition that hardware equipment is not added, vehicle downhill working condition recognition is newly added, when the vehicle is in the downhill working condition, the vehicle sliding energy recovery strength is improved, and the larger the slope is, the larger the sliding energy recovery strength is, so that the utilization rate of vehicle energy is improved.

Description

technical field [0001] The invention relates to the field of energy recovery, in particular to a method for controlling energy recovery of electric vehicle coasting. Background technique [0002] With the development of society, energy crisis and environmental pollution have become more and more important factors restricting economic development. Electric vehicles, as an effective direction to solve such problems, have been highly valued by governments and the automobile industry. Compared with traditional vehicles, due to the low energy density of batteries, the driving range of electric vehicles is generally not high, so the energy saving of electric vehicles has become the focus of research. In order to maximize energy saving, most electric vehicles currently have energy recovery technologies, mainly in the following two types: the first is to use the electric vehicle to switch the motor from the electric state to the power generation state when the electric vehicle brake...

Claims

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Application Information

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IPC IPC(8): B60L7/10
CPCB60L7/10B60L2240/12B60L2240/423B60L2240/642B60L2240/46
Inventor 叶文王长江
Owner 江西精骏电控技术有限公司
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