Passive equalization system based on model and equalization current estimation method

A technology of passive equalization and equalization of current, applied in the direction of charge equalization circuits, circuits, collectors, etc., can solve the problems of high cost, low equalization speed, and difficult regulation, and achieve high equalization current, high equalization speed, and reduce current sensors Effect

Active Publication Date: 2020-12-22
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a model-based passive equalization system and an equalization current estimation method to solve the problems of low equalization speed, difficult regulation and high cost in the prior art

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  • Passive equalization system based on model and equalization current estimation method
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  • Passive equalization system based on model and equalization current estimation method

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[0037] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circums...

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Abstract

The invention provides a passive equalization system based on a model and an equalization current estimation method, and belongs to the technical field of battery equalization. By utilizing the characteristics of the MOSFETs, the variable and controllable equalization current can be applied to the battery, and in order to eliminate an equalization current sensor, a model-based equalization currentestimation method is provided, so that the system cost is further reduced. An experimental platform is built, and experimental verification is carried out on the proposed QPBS. Experimental results show that the maximum equalization current of the QPBS can reach 10a, and the maximum equalization current of the PBM is about 0.1 A. Meanwhile, under the condition that the equalization current is required to be 10A, the cost of the provided QPBS main circuit is greatly reduced and is greatly lower than that of a PBM.

Description

technical field [0001] The invention belongs to the technical field of battery balancing, and particularly proposes a model-based low-cost quasi-passive balancing system (QPBS) and a balancing current estimation method. Background technique [0002] As promising solutions to the problems of environmental pollution and energy crisis, electric vehicles (EVs), photovoltaics, wind energy, and smart grids have attracted increasing attention. Batteries are widely used as energy storage systems (ESS) for such applications. However, due to the voltage and capacity limitations of the battery cells, the battery cells should be connected in parallel and / or in series to handle energy and power requirements. Unfortunately, due to both manufacturing and usage factors, inconsistencies are unavoidable with series connected cells. In fact, battery cells can be considered to be different from each other even within the same production batch. The inconsistency of the battery will lead to th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/42G06F17/12
CPCH02J7/0019H02J7/00712H02J7/007182H02J7/00714H01M10/4207H01M10/425G06F17/12H01M2010/4271Y02T10/7072
Inventor 徐俊边嘉豪王海涛梅雪松
Owner XI AN JIAOTONG UNIV
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