Storage battery and uninterruptible power supply

Abstract

A storage battery and an uninterruptible power supply relate to the technical field of uninterruptible power supplies. The storage battery comprises a positive electrode output line, a negative electrode output line and a neutral line, the positive electrode output line is connected with a first switch in series so as to switch on or switch off the positive electrode output line, the storage battery also comprises a second switch, and the second switch is connected with the negative electrode output line in series so as to switch on or switch off the negative electrode output line or connected with the neutral line in series so as to switch on or switch off the neutral line. The second switch is added to control the on-off of the negative output line or the neutral line, so that the negative output line or the neutral line is cut off when necessary, a loop cannot be formed between the negative output line and the neutral line after the system controls the storage battery to be closed, the voltage balance among all batteries in the storage battery is ensured, and the service life is prolonged. And the storage battery can be completely turned off in case of abnormality, so that the safety of the battery is protected, and the use safety is improved.

Description

technical field [0001] The technical solution relates to the technical field of uninterruptible power supply. Background technique [0002] UPS is an uninterruptible power supply. It is a system device that connects the battery to the host, and converts DC power into commercial power through a module circuit such as the host inverter. When the mains input is normal, the UPS will stabilize the mains and supply it to the load, and at the same time it will charge the internal battery; when the mains is interrupted, the UPS will immediately convert the DC power of the battery into the mains through the inverter. Continue to supply power to the load to maintain the normal operation of the load and protect the load software and hardware from damage. [0003] The battery is an important part of the UPS, and the battery is usually composed of multiple batteries connected in series. Usually, a switch is set on the positive output line of the battery, which plays an on-off role duri...

AI Technical Summary

Problems solved by technology

For this type of battery with a neutral line, after the switch on the positive output line is turned off, a loop may be formed between the neutral line and the negative pole, which will allow the battery between the neutral line and the negative pole to continue to be charged or discharged, resulting in a gap between the batteries inside the battery. Unbalanced voltage affects battery life

Moreover, the battery cannot be completely shut down when an abnormality occurs, which may invalidate the protection of the battery.

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