Connection method of energy storage battery and UPS and charging and discharging control method

Abstract

The invention provides a connection method of an energy storage battery and a UPS, the energy storage battery is used for replacing a lead-acid battery, the energy storage battery is connected with aPCS or an inverter, the energy storage battery is connected with a UPS host through an anti-reverse diode, and the anti-reverse diode is connected with a contactor in parallel. According to the connection method, the UPS host does not need to be modified, and timely power supply of the energy storage battery can be realized under the condition of mains supply outage. Moreover, the invention provides a charging and discharging method of the energy storage battery. The PCS, the inverter and the contactor are controlled through the monitoring device; the target backup capacity is set, under the control of the monitoring device, the electric quantity of the energy storage battery always reaches the target standby capacity; the difference between the total capacity of the energy storage batteryand the target standby capacity is used as the automatic charging and discharging capacity to automatically charge the energy storage battery and automatically discharge the PCS or the inverter, floating charge of the battery can be avoided, and the actual state of the energy storage battery can be monitored through PCS or inverter discharge, so that the reliability of the energy storage batteryis improved.

Description

technical field [0001] The invention belongs to power electronics technology, and in particular relates to a method for connecting an energy storage battery to a UPS and a method for controlling charging and discharging. Background technique [0002] UPS (Uninterruptible Power Supply), that is, uninterruptible power supply, is a system device that connects batteries (mostly lead-acid maintenance-free batteries) with electronic circuits, and converts direct current into commercial power through modular circuits such as inverters. It is mainly used for Providing stable and uninterrupted power supply for computers, computer network systems or other power electronic equipment, such as solenoid valves and pressure transmitters, is the cornerstone of ensuring information security and industrial automation. When the mains input is normal, the UPS will stabilize the mains and supply it to the load. At this time, the UPS is an AC voltage stabilizer, and it also charges the battery in...

AI Technical Summary

Problems solved by technology

[0006] The addition of new energy storage batteries in the above method does not solve the problem of long-term floating charging of the original lead-acid batteries, and there are always potential safety hazards; The access of the energy battery needs switching time. If the original lead-acid battery fails at this time, the new energy storage battery cannot guarantee the backup power supply in time.

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