Completely Decentralized Active Balancing Battery Management System
Completely Decentralized Active Balancing Battery Management System
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DOI：
10.1109/tpel.2017.2664922
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发表时间：
2018-01-01
影响因子：
6.7
通讯作者：
Howey, David A.
中科院分区：
文献类型：
--
作者：
Frost, Damien F.;Howey, David A.
串联连接的电池组串的性能通常受到电池组串中最差电池的限制，并且单个故障点将使整个电池组串不可用。为了解决这些问题，我们提出了一个分散的电池管理系统，没有通信要求的基础上的模块化多电平转换器拓扑结构与分布式电感器和分布式控制器上运行的本地微处理器。这种配置被称为“智能单元”。通过检测本地分布式电感器两端的电压，每个智能电池都能够：首先，确定其最佳开关模式，以最大限度地减少输出电压涟漪;其次，调整其占空比，使其荷电状态（SOC）与串联电池串的平均SOC同步。利用仓本振子理论导出了分散控制器，并研究了智能单元系统的稳定性。我们的实验表明，三个智能单元与分散控制器的系统可以准确地同步SOC，同时最大限度地减少其输出电压涟漪。
The performance of a string of series-connected batteries is typically restricted by the worst cell in the string and a single failure point will render the entire string unusable. To address these issues, we present a decentralized battery management system with no communication requirement based on a modular multilevel converter topology with a distributed inductor and distributed controller running on a local microprocessor. This configuration is referred to as a "smart cell." By sensing the voltage across the local distributed inductor, each smart cell is able to: first, determine its optimal switching pattern in order to minimize the output voltage ripple; and second, adjust its duty cycle to synchronize its state of charge (SOC) with the average SOC of the series string of cells. The decentralized controller is derived using the theory of Kuramoto oscillators, and the stability of a system of smart cells is investigated. We experimentally show that a system of three smart cells with their decentralized controllers can accurately synchronize the SOC while minimizing their output voltage ripple.