A Balance Control Scheme of SOC for Power Module Energy Storage Systems with Distributed Batteries

doi:10.7652/xjtuxb201910011

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A Balance Control Scheme of SOC for Power Module Energy Storage Systems with Distributed Batteries

更新时间：2025-07-09

- A Balance Control Scheme of SOC for Power Module Energy Storage Systems with Distributed Batteries
- Vol. 53, Issue 10, Pages: 79-85(2019)
- 作者机构：
  
  西安交通大学机械工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201910011
  CLC： TM910
- Online First：10 October 2019，
  
  Published：2019
- 稿件说明：
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A Balance Control Scheme of SOC for Power Module Energy Storage Systems with Distributed Batteries[J]. 2019, 53(10): 79-85.
DOI：

A Balance Control Scheme of SOC for Power Module Energy Storage Systems with Distributed Batteries[J]. 2019, 53(10): 79-85. DOI： 10.7652/xjtuxb201910011.

摘要

针对储能系统中锂电池充放电程度不一致而造成的电池过放/过充

从而导致电池使用寿命缩短的问题

提出了一种分布式储能系统的荷电状态(SOC)均衡控制方案。首先

采用单体电池电源模块串联的分布式储能结构

以单体锂电池估算SOC为控制对象; 然后

设计基于SOC均衡的加权因子分配公式

通过对电源模块分配不同的加权因子来调整各电源模块的占空比

从而动态调节各单体锂电池的充放电速率

实现分布式储能系统的SOC均衡控制

改变了传统电池组组内、组间两级均衡控制形式

消除了组内单体锂电池间能量传递造成的功率损失; 最后

采用负载电压调节与SOC均衡的双闭环控制结构

保证均衡过程中系统运行的稳定性。仿真结果表明:所提出的均衡控制方法能够有效实现储能系统的动态均衡控制

与SOC比例均衡控制方法相比均衡时间缩短了47%。

Abstract

A balance control scheme of state of charge(SOC)for distributed energy storage systems is proposed to deal with the problem that inconsistencies of charge and discharge degree of lithium batteries lead to the over-charge/over-discharge of the batteries

and shorten the life of batteries in an energy storage system.A distributed energy storage structure with a single battery power module series is adopted and estimations of SOC of single lithium batteries are used as control object.An allocation formula of weighting factors is designed based on balance of SOC to adjust the charge and discharge rate of each single lithium battery dynamically and to achieve the SOC balance of the distributed energy storage system

which breaks the double-stage balance control mode in the traditional battery pack balance and eliminates the power loss caused by the energy transfer between the battery cells in the group.Moreover

the double closed-loop control of load voltage regulation and SOC balance contr

关键词

Keywords

references

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