A Model-Based Passive Equalization System and Equalization Current Estimation Method

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

Active Publication Date: 2022-07-12
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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[0037] In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are 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", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate ...

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Abstract

The invention provides a model-based passive balancing system and a balancing current estimation method, which belong to the technical field of battery balancing. The invention utilizes the characteristics of the MOSFET, and can apply a variable and controllable equalizing current to the battery. In order to eliminate the equalizing current sensor, a model-based equalizing current estimation method is proposed, which further reduces the system cost. An experimental platform is built, and the proposed QPBS is experimentally verified. The experimental results show that the maximum equalization current of QPBS can reach 10a, while that of PBM is about 0.1A. At the same time, under the condition of equalizing current requirement of 10A, the cost of the proposed QPBS main circuit is greatly reduced, which is much lower than that of 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] Electric vehicles (EVs), photovoltaics, wind energy, and smart grids have attracted increasing attention as promising solutions to the problems of environmental pollution and energy crisis. 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 demands. Unfortunately, due to manufacturing factors and usage factors, inconsistencies are unavoidable for cells connected in series. In fact, even within the same production batch, the cells can be considered to be different from each other. The inconsistency of the battery will cause the maxi...

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Application Information

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Patent Type & Authority Patents(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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