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Single-energy-source electro-mobile variable-current regenerative braking control method

An electric vehicle, regenerative braking technology, applied in electric vehicles, electric braking systems, vehicle components, etc., can solve problems such as battery damage, and achieve the effect of improving energy recovery efficiency

Active Publication Date: 2015-04-01
浙江越士科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the above methods do not take into account the limitation of battery charging current, and excessive feedback current will cause damage to the battery.

Method used

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  • Single-energy-source electro-mobile variable-current regenerative braking control method

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. While the invention will be described in conjunction with the preferred embodiments, it will be understood that it is not intended to limit the invention to the described embodiments. On the contrary, the invention is to cover alternatives, modifications and equivalents, which may be included within the scope of the invention as defined by the appended claims.

[0025] The technical solution adopted by the present invention is that when the electric vehicle regeneratively brakes, the maximum braking torque of the motor can be determined according to the vehicle speed, motor voltage and current; As input observations, precise identification of regenerative braking times is performed. At the same time, information such as battery SOC, voltage, and temperature are obtained through the battery management system, and based on the identified braking time, the ...

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PUM

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Abstract

The invention discloses a single-energy-source electro-mobile variable-current regenerative braking control method. The method comprises the following steps: (1) determining a maximum braking torque of a motor according to vehicle running speed, motor voltage and current so as to obtain armature current of the motor; (2) controlling a system to identify regenerative braking time; (3) determining the maximum acceptable charging current of a battery based on the identified braking time; (4) reasonably allocating a mechanical braking force and a motor braking force based on identified braking strength; (5) comparing the motor regenerative braking current with the battery acceptable charging current to obtain regenerative braking feedback current; (6) with reduction of the vehicle speed, continuously changing the maximum feedback current, and dynamically following the acceptable charging current. The method disclosed by the invention has the beneficial effects that by taking the feedback current as a controlled object, the method integrates the battery charging safety with system protection and improves the energy recycle efficiency as far as possible.

Description

technical field [0001] The invention relates to a braking control method of an electric vehicle, in particular to a method for controlling regenerative braking of a single energy source electric vehicle with variable current. Background technique [0002] Electric vehicles are mainly powered by batteries and driven entirely or partially by electric motors. They are high-tech products involving multiple disciplines such as machinery, electronics, electricity, and microcomputer control. In recent years, the research and development of electric vehicles has shown a trend of accelerated development in countries all over the world, and all countries are actively promoting the development of electric vehicles. [0003] One of the most important differences between electric vehicles and traditional fuel vehicles is that electric vehicles can achieve regenerative braking, recovering part of the energy lost during the braking process of traditional fuel vehicles, thereby increasing t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/18
Inventor 宋士刚钱少明林勇刘福庆毛亚郎
Owner 浙江越士科技有限责任公司
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