Cell charging controller and charging method for UPS

Abstract

The present invention aims at providing one kind of charging device and method with high reliability and capacity of prolonging the service life of accumulator. The technological scheme is that micro controller unit, pulse width regulating control unit, main charging circuit unit, and signal acquisition unit are connected successively. The micro controller unit controls the pulse width regulating control unit based on the signal the signal acquisition unit acquires to provide first the great and limited charging current and then limited equalized voltage and slowly reduced current, convert into intermittence after the set time is over or the charging current reaches preset value, and convert into floating charging in lower voltage and smaller current before converting into sleep and turning off the charger. Meanwhile, the pulse width regulating control unit changes the pulse width based on the acquired temperature signal to provide the charger with required voltage.

Description

technical field [0001] The invention relates to charge and discharge management of accumulators, in particular to a method for intelligently charging accumulators in UPS (Uninterruptible Power Systems), that is, uninterruptible power supplies. Background technique [0002] Battery is an important part of UPS. The cost of battery in long-time UPS is almost equal to the cost of UPS mainframe. Many UPS failures are caused by battery failure or improper use of battery management. However, the disadvantages of battery management in traditional UPS are: [0003] Long-term floating charge. After the traditional charger performs simple current limiting or constant voltage charging to about 90% of the battery capacity, most of the time it uses a constant voltage for long-term floating charging. However, the charged power does not completely become the electrical energy we need, but becomes the decomposition of battery moisture and heat energy that is h...

AI Technical Summary

Problems solved by technology

[0005] The invention aims to overcome the long-term floating state of the battery in the prior art, which easily causes moisture loss inside the battery, most of the power charged by the charger is converted into heat and is consumed, and causes the battery plate to age easily, the activity of the plate is reduced, and the patent In 01209813, when the equalized charging voltage point is reached, the charger output is immediately turned off, causing the battery to be insufficiently charged, etc., and a charging device and charging method with high reliability, prolonging the service life of the battery, and good charging effect are provided.

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