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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

Active Publication Date: 2014-01-08
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

However, from the analysis of the current status of active equalization technology research, active equalization schemes involve too many components, the actual structure is complex, and there are still many problems such as the safety and stability of the system. Most equalization schemes are still in the theoretical research stage and have not yet get practical application

Method used

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  • Active equalization system of battery pack
  • Active equalization system of battery pack

Examples

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] Such as figure 1 As shown, the balance control system 01 includes a battery state monitoring unit 07 , a balance control unit 03 , a DC / DC direct voltage conversion unit 02 , and a channel switching unit 06 . The battery pack 08 is composed of battery cells b1, b2, ..., bn in series, and the battery monitoring unit 07 is used to monitor the voltage, current and temperature signals of each battery cell b1, b2, ..., bn in real time; the balance control unit 05 Receive the signal sent by the battery state monitoring unit 07, send the balance control command and the balance channel gating command according to the balance control strategy; the channel switching unit 06 receives the balance channel logic gating command sent by the balance control unit 05, and controls the opening and closing of the balance loop Shutdown; the DC / DC DC voltage ...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 王立业王丽芳李勇徐冬平张志刚
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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