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Direct-type lithium ion battery lossless equilibration circuit and equilibration control method

A lithium-ion battery, non-destructive equalization technology, applied in battery circuit devices, circuit devices, current collectors, etc., to achieve the effects of simple control structure, low cost and high efficiency

Active Publication Date: 2013-12-18
JIANGSU ALFA BUS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a novel direct lithium-ion battery lossless equalization circuit and equalization control method to overcome the shortcomings of the existing equalization method

Method used

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  • Direct-type lithium ion battery lossless equilibration circuit and equilibration control method
  • Direct-type lithium ion battery lossless equilibration circuit and equilibration control method
  • Direct-type lithium ion battery lossless equilibration circuit and equilibration control method

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Embodiment Construction

[0024] Such as figure 1 It is a schematic block diagram of the overall structure of the present invention. The present invention relates to a direct lithium-ion battery lossless equalization circuit, comprising a lithium-ion battery pack C, an equalization switch control unit S, a transformer equalization unit L and an equalization switch control circuit.

[0025] Lithium-ion battery pack C contains more than one battery cell C X (Such as figure 1 C in 1- C 6 ), the lithium-ion battery pack C controls the energy in the battery cell C through the transformer equalization unit L controlled by the equalization switch control unit S X flow between them to complete the balancing function.

[0026] Each battery cell C X Corresponding to an equalizing switch control unit S and a transformer equalizing unit L.

[0027] Each balance switch control unit S includes two balance control switches S X (Such as figure 1 S in 1- S 12 ), the two balance control switches S X The cor...

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Abstract

The invention discloses a direct-type lithium ion battery lossless equilibration circuit and an equilibration control method and belongs to the field of battery management systems of electromobiles or large-power energy storage power stations. The circuit comprises a lithium ion battery pack, an equilibration switch control unit, a transformer equilibration unit and an equilibration switch control circuit. The lithium ion battery pack comprises more than one battery cell and controls energy to flow between the battery cells through the transformer equilibration unit controlled by the equilibration switch control unit, and thus the equilibration function is achieved. The direct-type lithium ion battery lossless equilibration circuit and the equilibration control method can make battery energy directly flow to batteries with lower voltage from batteries with high voltage and have the advantages of being high in efficiency, low in cost and simple in control structure.

Description

technical field [0001] The invention belongs to the technical field of battery management systems for electric vehicles or high-power energy storage power stations, and relates to a direct lithium-ion battery equalization circuit and an equalization control method. Background technique [0002] Electric vehicles or high-power energy storage systems are composed of a large number of battery modules in series. Due to the inconsistency in the performance of lithium-ion battery cells, there will be inconsistencies in the cell voltage when the battery pack is charging and discharging. During the charging or discharging process of the battery pack, as long as one battery cell reaches the charging and discharging voltage limit of the battery, the entire battery pack must stop charging and discharging, otherwise the single cell will be overcharged or overdischarged, seriously affecting the battery life , this phenomenon seriously restricts the charging and discharging ability of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 杨重山
Owner JIANGSU ALFA BUS