Series storage battery pack double modular parallel flyback energy equalizer and control method thereof

A technology for energy equalization and battery packs, applied in charge equalization circuits, electrochemical generators, current collectors, etc., can solve the problems of poor energy balance control ability, low energy transfer efficiency, slow equalization speed, etc., and achieve fast equalization speed, Ease of expansion and high utilization of components

Pending Publication Date: 2021-08-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current equalizers generally have the problems of low energy transfer efficiency, slow equalization speed, and poor control over equalized energy.

Method used

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  • Series storage battery pack double modular parallel flyback energy equalizer and control method thereof
  • Series storage battery pack double modular parallel flyback energy equalizer and control method thereof
  • Series storage battery pack double modular parallel flyback energy equalizer and control method thereof

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Embodiment 1

[0031] Embodiment 1: as Figure 1-5As shown, a double modularized parallel flyback energy balancer for series battery packs, including i balance modules, i balance modules pass through 5i mosfet switches with antiparallel diodes, i flyback transformers Tn, i It is composed of battery units BUn connected in series, and i equalization modules are used to form an inductance equalization module and a flyback transformer equalization module, n=1, 2, . . . , i.

[0032] Further, the i balancing modules can be set, each of which has the same structure, and every battery unit composed of two single cells, 5 mosfet switches with anti-parallel diodes and a flyback transformer form a balancing module; for the first n equalization modules: the nth inductance equalization module is formed through the primary winding of the flyback transformer Tn, mosfet switch nM1, mosfet switch nM2, and mosfet switch nM4, through the flyback transformer Tn, mosfet switch nM1, mosfet switch nM3, The mosfe...

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Abstract

The invention discloses a series storage battery pack double modular parallel flyback energy equalizer and a control method thereof, the series storage battery pack double modular parallel flyback energy equalizer comprises i equalization modules, and the i equalization modules are composed of 5i mosfet switches with antiparallel diodes, i flyback transformers and i series-connected battery units, and the i equalization modules are used for forming an inductance equalization module and a flyback transformer equalization module. In the static state, the inductance equalization modules are used for carrying out first equalization, the inductance equalization modules are simple in circuit structure, all the modules are independent of one another, all the inductance equalization modules work at the same time during equalization, the equalization speed is high, and control and implementation are easy; the second equalization is realized by utilizing flyback transformer equalization modules, the equalization topology circuit principle is simple, the control capability on equalization current is strong, the equalization energy transfer efficiency is high, the flyback transformer equalization modules are mutually independent, the flyback transformer equalization modules work simultaneously during equalization, and the equalization speed is high.

Description

technical field [0001] The invention relates to a dual modularized parallel flyback energy equalizer for series battery packs and a control method thereof, belonging to the technical fields of power electronics technology and battery pack energy balance management. Background technique [0002] As people pay more and more attention to environmental issues caused by the use of traditional fossil fuels, new energy vehicles are becoming more and more popular. In order to meet the power requirements of electric vehicles, the vehicle battery pack needs to connect several single cells in series to form a group. Due to the differences in the processing accuracy of lithium single cells and the ventilation conditions, contact thermal resistance, and self-discharge degree in later use, there are inevitably inconsistencies in the cells in the battery pack, which will affect the performance of the entire battery pack. cause serious impact. [0003] After the batteries are connected in...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/44H02M3/335
CPCH02J7/0014H02J7/0016H01M10/441H02M3/33576Y02E60/10
Inventor 刘红锐李海瑞张开翔张彬古栋华
Owner KUNMING UNIV OF SCI & TECH
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