Fuel cell/lithium ion battery hybrid power energy management system used for electric bicycle

A fuel cell system and energy management system technology, applied in electric vehicles, battery circuit devices, current collectors, etc., can solve the problems of poor flexibility, large space and proportion of the controller, and improve the safety of the whole vehicle. performance and economy, improve floating charge safety, and optimize output performance
CN103227487AActive Publication Date: 2013-07-31SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTHWEST JIAOTONG UNIV
Publication Date
2013-07-31

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Abstract

The invention discloses a fuel cell / lithium ion battery hybrid power energy management system used for an electric bicycle, which comprises an energy management unit, which controls a fuel cell system unit to charge a lithium ion batter unit, controls a hybrid power system to supply power to the external, and is electrically connected with the fuel cell system unit and the lithium ion battery unit respectively. The energy management system reliably clamps the output power of the fuel cell unit in real time, optimizes the output performance of the fuel cell system unit, estimates the under-voltage float charge voltage of the lithium ion batter unit in real time on the base of the working temperature of the lithium ion batter, avoids over charge of the lithium ion battery on the premise of reducing the capacity loss of the lithium ion battery, can improve the float charge safety of the lithium ion battery unit, and further improves the overall safety and the economy of the fuel cell / lithium ion battery hybrid power electric bicycle system.
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Description

technical field

[0001] The invention relates to a fuel cell / lithium ion battery hybrid energy management system for an electric bicycle. Background technique

[0002] With the continuous increase of people's demand for green travel and the continuous enhancement of environmental protection awareness, fuel cell / lithium-ion battery electric bicycles characterized by lightness, flexibility, energy saving and environmental protection have gradually entered people's field of vision. At present, the rated voltage of the DC motor of the electric bicycle is usually 36V and 48V, so in this low-voltage DC application, the main system of the fuel cell / lithium-ion battery hybrid power system is on the output DC bus of the fuel cell cascaded DC converter When the lithium-ion battery pack is connected, the voltage variation range of the DC bus, that is, the charging and discharging voltage range of the lithium-ion battery pack matches the working voltage range of the electric bicycle moto...

Claims

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