Charging/discharging controlling system of serial storage battery set and charging/discharging optimizing method

Abstract

The invention discloses a charging / discharging controlling system of a serial storage battery set as well as a charging / discharging optimizing method of the system, the charging / discharging controlling system comprises a storage battery set central control module, a parallel switch set controlling module, a storage battery set hierarchical controlling module, a hierarchical asynchronous positive / negative pulse charging controlling module, a storage battery set balanced discharging controlling module, a parameter detector and a unit cell lossy detection controlling module. With the adoption of the charging / discharging scheme which classifies the serial storage battery set and allocates a unit cell to each section in accordance with the classification, the inconsistency difference of the performance of the entire storage battery set is reduced in the charging / discharging process; and meanwhile, a pulse charging way is adopted to reduce the phenomenon of the sulfation, so that the optimal combined mode of charging and discharging of the entire system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of charging and discharging lead-acid storage batteries, in particular to the technical field of solving the performance inconsistency of charging and discharging single cells of series storage battery packs. Background technique [0002] At present, the valve-regulated lead-acid battery (VRLA) is widely used in industrial energy storage equipment due to its excellent sealing performance, high energy density, and low price. In some small independent photovoltaic power generation systems, the performance of the battery energy storage system is particularly important for the efficiency of solar energy and the stability of the entire photovoltaic system. However, due to the characteristics of the battery itself and the technical limitations of battery charge and discharge management, the use of traditional charge and discharge methods (such as constant current, constant voltage, etc.) will cause a series of pro...

AI Technical Summary

Problems solved by technology

[0003] 1. Long-term undercharging, overcharging, and over-discharging will lead to serious sulfation of the battery, high gas evolution rate, reduced battery capacity, and greatly reduced service life

[0004] 2. During the charging process of the battery, the internal resistance will generate heat, resulting in an increase in the internal temperature

If the temperature is not detected and controlled in time, and the electrical parameters of charging and discharging are adjusted in time, the life of the battery will be greatly reduced.

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