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Transfer-type real-time battery equalizer with bidirectional synchronous rectification function

A technology of battery equalization and two-way synchronization, which is applied in the arrangement of multiple synchronous batteries, charge equalization circuits, collectors, etc., can solve the problems of large loss and low equalization efficiency, and achieve reduced equipment costs, high equalization efficiency, and equalized current wide range of effects

Inactive Publication Date: 2019-03-05
周宝林 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large conduction voltage drop of the diode, the loss is large during high current equalization, and the equalization efficiency is low

Method used

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  • Transfer-type real-time battery equalizer with bidirectional synchronous rectification function
  • Transfer-type real-time battery equalizer with bidirectional synchronous rectification function
  • Transfer-type real-time battery equalizer with bidirectional synchronous rectification function

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Embodiment Construction

[0029] The present invention is described in detail below in conjunction with accompanying drawing:

[0030] The invention discloses a transfer-type real-time battery equalizer with bidirectional synchronous rectification function based on a single battery cell series battery pack, including a square wave signal generator, an electronic switch, a pulse shaping and driving circuit, a pulse width control circuit, and a relative voltage Comparing and fuzzy control circuit, synchronous rectification control circuit and transduction circuit and other seven functional circuits, such as figure 1 As shown, among them, the square wave signal generator is respectively connected with the electronic switch and the pulse width control circuit; the relative voltage comparison and the fuzzy control circuit are not only connected with the pulse width control circuit, but also connected with the electronic switch and the synchronous rectification control circuit; the electronic switch It is al...

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Abstract

The invention provides a transfer-type real-time battery equalizer with a bidirectional synchronous rectification function, and relates to the technical field of battery management. The transfer-typereal-time battery equalizer comprises a square wave signal generator, an electronic switch, a pulse shaping and driving circuit, a pulse width control circuit, a relative voltage comparison and fuzzycontrol circuit, a synchronous rectification control circuit and an energy exchange circuit. By detecting and controlling relative voltage difference between adjacent batteries in real time, the electric energy transferring equalization function is involved and achieved in real time and is nothing to do with an actual voltage of a single battery and a state of a battery pack, batteries in arbitrary numbers are connected in series, the size of an equalization current is automatically adjusted according to the relative voltage difference, the equalization current and the efficiency are substantially improved by a bidirectional synchronous rectification technology, the problem of short service lifetime caused by non-consistency of the battery pack is solved, and rapid attenuation and thermalrunaway of the battery pack are effectively controlled. The transfer-type real-time battery equalizer is low in cost and long in effective equalization time, the battery capacity utilization rate is improved, and the transfer-type real-time battery equalizer is particularly applicable to a large-capacity power lithium battery pack, a single 2V lead-acid storage battery pack, a supercapacitor bankand the like.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a transfer type real-time battery equalizer with bidirectional synchronous rectification function. Background technique [0002] In the application fields of high-power power battery packs such as pure electric vehicles, plug-in hybrid electric vehicles, locomotives, ships, and energy storage power stations, battery packs are the key energy sources. The power battery pack is composed of single cells with the same design parameters in series and parallel. Due to the influence of factors such as production technology, charging and discharging parameters, and ambient temperature, the battery pack will gradually produce inconsistencies after running for a period of time, mainly in In terms of obvious differences in main parameters such as voltage, internal resistance, self-discharge rate, and capacity, especially the difference in voltage and capacity is the most obvious, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0016H02J7/0019
Inventor 周宝林周全
Owner 周宝林
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