Equalization protection control method for series-parallel combined battery cluster

Abstract

The invention discloses an equalization protection control method for a series-parallel combined battery cluster. The equalization protection control method comprises the steps of acquiring operation information of a plurality of batteries based on a battery cluster management unit; according to the operation information, a self-checking result, the alarm protection state and the communication state, judging whether each battery meets an equalization starting condition and an equalization protection condition or not based on the battery cluster management unit; when the equalization starting condition and the equalization protection condition are both met, sending an equalization starting instruction to the battery management unit; and based on the battery management unit, judging whether the voltage information and the temperature information are within a preset range or not, if so, performing equalization control on the corresponding battery, and if not, maintaining the battery in the existing state. Through an equalization battery voltage protection strategy, wrong equalization and excessive equalization possibly caused by internal and external factors such as device hardware faults, battery working abnormity and communication abnormity are avoided, and safety and reliability of battery working in the equalization process are guaranteed to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of charge control, in particular to a balanced protection control method for series-parallel combined battery clusters. Background technique [0002] After the establishment of the dual carbon goals, the pace of clean and low-carbon transformation of the energy and power system has accelerated, and new energy has also ushered in new development opportunities. However, the unstable, fluctuating, and unpredictable characteristics of new energy power generation naturally increase the workload and difficulty of maintaining safe and stable operation of the power system. In order to solve this problem, various provinces have introduced policies to encourage the deployment of a certain proportion of energy storage on the new energy side to alleviate the impact of intermittent and volatile new energy power generation on the power system from the source, and to ensure friendly access to new energy. [0003] In order...

AI Technical Summary

Problems solved by technology

However, the current research on active equalization is mainly focused on the equalization control strategy, using voltage, SOC or capacity as the basis for equalization, and improving the consistency of the single battery through corresponding control strategies; little consideration is given to sampling deviation and abnormal communication. Or the possible impact of misbalance and overbalance caused by internal and external factors such as balance circuit failure on the battery

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