Active equalization system of battery pack

A technology of active equalization and equalization system, applied in electric vehicles, battery circuit devices, current collectors, etc., can solve the problems of complex actual structure, no practical application, too many components, etc., and achieve the effect of reducing power consumption
CN103501025AActive Publication Date: 2014-01-08INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
Publication Date
2014-01-08

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Abstract

Provided is an active equalization system of a battery pack. The active equalization system of the battery pack comprises a battery state monitoring unit (07), a channel switching unit (06), a DC / DC direct voltage conversion unit (02) and an equalization control unit (05), wherein the battery state monitoring unit (07) is used for measuring voltage of batteries (b1,b2......bn) of the battery pack in a real-time mode, the equalization control unit (05) is used for receiving battery monitoring data in a real-time mode, and sending logic gating signals and equalization control signals to the channel switching unit (06) and the DC / DC direct voltage conversion unit (02) respectively, the channel switching unit (06) is used for receiving the output logic gating signals of the equalization control unit (05), and controlling equalization loops of the batteries to be connected and be disconnected, and the DC / DC direct voltage conversion unit (02) is used for carrying out equalization on the batteries (b1,b2......bn) by receiving the equalization control signals of the equalization control unit (05). The active equalization system of the battery pack can carry out equalization on any single battery of the battery pack, and is high in equalization efficiency.
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Description

technical field

[0001] The invention relates to an active equalization system for a battery pack, in particular to an active equalization system for a lithium-ion battery pack connected in series for an electric vehicle. Background technique

[0002] Due to the inherent electrochemical characteristics of the battery, the rated operating voltage of the single battery is usually very low. In some high energy demand applications such as electric vehicle power supply, grid battery energy storage and other technical fields, in order to meet the energy demand of the system, the usual method is to connect a large number of battery cells in series and use them in groups. The number of batteries connected in series ranges from tens to hundreds of strings, and the battery capacity ranges from a few Ah to hundreds of Ah. Due to the limitations of the battery manufacturing process, the characteristics of each battery cell will have slight differences. When a large number of battery cel...

Claims

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