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A high-efficiency energy recovery system based on fast-charging batteries

An energy recovery and rechargeable battery technology, which is applied in electric braking systems, electric vehicles, vehicle components, etc., can solve the problems of single energy recovery mode, insufficient experience improvement, low recovery efficiency, etc., to overcome the problems of braking energy recovery systems and The effect of the control method

Active Publication Date: 2021-06-04
西安电子科技大学芜湖研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention has a single energy recovery mode and low recovery efficiency, which does not improve user experience enough

Method used

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  • A high-efficiency energy recovery system based on fast-charging batteries

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Embodiment 1

[0029] Such as figure 1 As shown, a high-efficiency energy recovery system based on a fast charging battery, the energy recovery power system includes a motor 1, a user control command selection unit 2, a vehicle controller 3, a grid drive control unit 4, and a motor controller 5 , a two-way BUCK-BOOST circuit control unit 6, a selection switch 7, a supercapacitor 8, a fast charging battery pack 9 and a power device module 10;

[0030]The user control command selection unit 2 is connected to the vehicle controller 3, the vehicle controller 3 is connected to the motor controller 5, and the motor controller 5 is also connected to the grid drive control unit 4 and the bidirectional BUCK-BOOST circuit The control unit 6, the selector switch 7 are connected to the supercapacitor 8, the gate drive control unit 4 is connected to the power device module 10, the power device module 10 is directly connected to the motor 1, and the gate drive control unit 4 is also connected to the elect...

Embodiment 2

[0038] Such as figure 1 As shown, a high-efficiency energy recovery system based on fast charging batteries, including energy recovery and control methods are:

[0039] The energy recovery control method is based on the rotational speed R driven by the automobile machinery. 机 The resulting rotational speed R provided by the kinetic energy 电 The relationship between, through the speed of the motor 1 can determine the induced voltage U generated corresponding to the speed 感 , there is a relationship between the speed of motor 1 and the output induced voltage V=N*R, (0感 , when R 机 >R 电 When the energy is recovered, the fast charging battery pack (9) can be charged at a high rate of 8C-10C. In the case of energy overcharge, that is, when 0.98U 动 充 (battery voltage in charging state) 动 (Battery pack rated voltage) adopts supercapacitor energy recovery state for auxiliary energy recovery, which is used to provide electric energy during the starting process after braking, so as t...

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Abstract

The invention discloses a high-efficiency energy recovery system based on a fast-charging battery. The energy recovery system includes a motor, a user control command selection unit, a vehicle controller, a grid drive control unit, a power device module, a motor controller, and a bidirectional BUCK ‑BOOST circuit control unit, selector switch, supercapacitor and fast-charging battery pack, the present invention is based on the energy recovery of a high-current rechargeable battery pack and adopts a bidirectional controllable BUCK‑BOOST circuit and control method, including a control strategy for energy recovery, The present invention is based on the output characteristics of the motor and the charging characteristics of the battery pack, and sets up a set of bidirectional buck-boost energy recovery circuit. In the best state, the best recovery efficiency is achieved.

Description

technical field [0001] The invention relates to the field of new energy electric vehicles, in particular to a high-efficiency energy recovery system based on fast charging batteries. Background technique [0002] At present, the efficiency of the energy recovery system of electric vehicles is low, and energy recovery and consumption are performed through series connection of multi-channel buck-boost circuits and braking circuits, resulting in low energy recovery efficiency, and energy waste restricts the battery life. Generally, multi-channel The boost mode reduces the energy conversion efficiency, and it is often impossible to choose energy recovery level control and high current recovery energy. At the same time, a large amount of mechanical energy is consumed as heat. One of the biggest problems of electric vehicles at present is the battery life problem. In addition to the battery capacity, it is to improve the utilization rate of electric energy and perform energy recov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/10
Inventor 檀生辉吴勇王东陈兴伍旭东张金生卫祥何滇张玉明
Owner 西安电子科技大学芜湖研究院
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