Power supply method of communication equipment with high reliability

Abstract

The invention relates to a power supply method of communication equipment with high reliability. The power supply method comprises the following steps of: firstly, providing a parameter setting module for setting current values and voltage values which comprise a protection current value, wherein the protection current value is correlated to a nominal capacity of a battery and is more than the current needed by the communication equipment; then judging whether the total output current of a rectification module is more than the protection current value or not by a communication power system when the present charging current of the battery measured by a current sensor exceeds a current limiting value of battery charging, reducing the output voltage of the rectification module if the total output current is more than the protection current value; otherwise, further judging whether the output voltage exceeds a set charging voltage value or not, reducing the output voltage if the output voltage exceeds the set charging voltage value; otherwise, continuously judging whether the output voltage exceeds a safe voltage value or not, reducing the output voltage to the safe voltage value if the output voltage exceeds the safe voltage value; and otherwise, constantly judging whether the present charging current of the measured battery exceeds an overcurrent value of battery charging or not, boosting the voltage to the safe voltage if the present charging current exceeds the overcurrent value. Therefore, the power supply reliability for the communication equipment is improved.

Description

technical field [0001] The invention relates to a high-reliability communication equipment power supply method. Background technique [0002] The existing communication power supply system is often equipped with a battery, which is used as a backup power supply during a power failure. The backup battery is charged by the rectifier module. In order to avoid excessive charging and discharging current of the backup battery, a battery current sensor is configured to measure the charging and discharging current of the battery, and the power supply monitoring unit adjusts the output of the rectifier module according to the measured value to maintain The charging current is at the most suitable value, usually the charging current is 10% of the nominal capacity of the battery, expressed as 0.1C 10 . And if the charging current exceeds 0.25C 10 , the backup battery will be damaged. [0003] In order to accurately measure the charge and discharge current of the battery, two types ...

AI Technical Summary

Problems solved by technology

[0004] However, when the sensor circuit fails, it will return a wrong voltage signal, causing the monitoring unit to wrongly judge the battery current

Generally, there will be two failure situations, one is that the return charging current is very large; the other is that the return discharge current is very large

The first situation is very harmful, because when the monitoring unit reads that the charging current is very high, in order to protect the battery, it will reduce the output voltage of the rectifier module

And because the sensor is faulty at this time, the charging current value returned again is still the same as the first time. Therefore, without special protection measures, the output voltage of the rectifier module will continue to drop, and the output current will eventually drop to 0. , at this time, the battery will continue to discharge as a backup power source, and when the battery energy is exhausted, there will be an accident that the mains power is normal but the communication equipment is powered off, which will lead to communication interruption

[0005] Therefore, how to solve the power-off accident of communication equipment caused by the failure of the battery current sensor in the existing communication power supply system, so as to improve the power supply reliability of the communication power supply system, has become a technical issue urgently to be solved by those skilled in the art.

Images