Dynamic reconstruction method and balance control system of power system storage battery

Abstract

The invention discloses a balance control system of a power system storage battery. The balance control system comprises a plurality of battery balance modules, wherein each battery balance module comprises an energy storage inductor, two power switches and two fly-wheel diodes; and every two adjacent single batteries correspond to one battery balance module. The invention further discloses a dynamic reconstruction method which comprises the following steps: detecting a voltage of a single battery by using a signal acquisition circuit, processing a voltage signal of the single battery by usinga DSP (Digital Signal Processor) system, generating a PWM (Pulse-Width Modulation) control signal, processing the PWM control signal by using a driving circuit, and finally driving a MOSFET (Metal-Oxide -Semiconductor Field Effect Transistor) switch, finally achieving conduction of electric energy among single batteries. Compared with a fixes serial / parallel connection access system of a conventional battery management system, the balance control system comprises physical layer batteries which are accessed through a reconfigurable battery network. By adopting the battery reconstruction method, the battery grouping management performance can be improved.

Description

Technical field [0001] The invention relates to the field of power system storage batteries and storage battery management, in particular to a method for dynamic reorganization of power system storage batteries and an equilibrium control system thereof. Background technique [0002] In order to ensure the high power supply safety and reliability of the DC power supply system of power plants and substations in the power system, a certain capacity valve-controlled sealed lead-acid battery is equipped in the DC power system as a backup power source after AC power failure. The final safety barrier for the DC power supply system of the substation. [0003] At present, most of the DC power supply systems of substations use valve-regulated sealed lead-acid batteries with moderate cost performance, and the battery cell terminal voltage is small. Therefore, in actual projects, multiple battery cells are often used in series to meet the voltage requirements of the equipment. [0004] The fixe...

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Problems solved by technology

[0006] At the same time, there will be certain performance and voltage differences between the cells connected in series. If this difference is not balanced and suppressed in time, the imbalance will continue to aggravate with the increase of the number of charge and discharge cycles, resulting in a decrease in the capacity of the cells. Rapid attenuation, and eventually the failure of individual cells will affect the work of the entire battery pack and even the DC power system

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