Electric vehicle brake energy feedback system and electric retarding method

A technology of braking energy feedback and electric vehicles, applied in electric braking systems, electric vehicles, vehicle energy storage, etc., can solve the problems of no electric retarding function, etc., to increase mileage, reduce wear, and improve braking safety Effects on sex, reliability and energy utilization

Inactive Publication Date: 2018-06-08
CHENGDU BUS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention overcomes the deficiencies of the prior art and provides a braking energy feedback system and electric retarding method for electric vehicles, which are used to solve the problem that there is no electric retarding function when the battery power is high and the battery cannot be charged for energy recovery. technical problem

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  • Electric vehicle brake energy feedback system and electric retarding method
  • Electric vehicle brake energy feedback system and electric retarding method
  • Electric vehicle brake energy feedback system and electric retarding method

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0028] A braking energy feedback system for an electric vehicle, comprising:

[0029] An anti-battery recharging circuit, the anti-battery recharging circuit is set on the line where the battery supplies power to the motor, and is used to block the electrical energy recovered and converted from the mechanical energy of the motor in reverse to the charging the battery;

[0030] A discharge resistance circuit, the discharge resistance circuit is connected on the line between the anti-battery recharging circuit and the motor, and is used to block the electrical energy recovered and converted from the mechanical energy of the motor in the anti-battery recharging circuit to the said anti-battery recharging circuit. In the case of battery charging, the electrical energy recovered and converted from the reversed ...

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Abstract

The invention discloses an electric vehicle brake energy feedback system. The system comprises a battery recharging prevention loop and a discharge resistor loop, wherein the battery recharging prevention loop is used for blocking electric energy obtained by motor reverse mechanical energy recycling conversion from charging a battery on the condition that the electric quantity of the battery is high, and recharging and energy storage cannot be performed; the discharge resistor loop is used for preferentially supplying the electric energy obtained by motor reverse mechanical energy recycling conversion to whole vehicle accessories as demand on the condition that the battery recharging prevention loop blocks the electric energy obtained by motor reverse mechanical energy recycling conversionfrom charging the battery, and then excessive electric energy is consumed through the discharge resistor loop. On the condition that the electric quantity of the battery is high, and recharging and energy storage cannot be performed, it is ensured that the electric retarding function is normal, the brake security and reliability are improved, the energy utilization rate is increased, and abrasionto a brake friction plate is lowered.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a braking energy feedback system and an electric retarding method for electric vehicles. Background technique [0002] For cars that often drive in mountainous or hilly areas, the vehicle needs to reduce or maintain a stable speed for a long time and continuously when going down a long slope. Auxiliary braking devices such as retarders are usually required. The principle of electric vehicle retarding is that when braking, the drive motor is transformed into a generator to apply reverse torque, forming a reverse current to charge the power battery, achieving the purpose of auxiliary braking (electric braking) to decelerate the vehicle, and at the same time improving Energy efficiency of electric vehicles. Effectively prolonging the driving range of the electric vehicle, when the battery power is high (90%-100%), when the battery cannot be charged for energy recovery, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/10B60L11/18B60R16/02
CPCB60L7/10B60R16/02B60L50/50Y02T10/70
Inventor 鄢俊蒋平
Owner CHENGDU BUS
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