The backup UPS power supply of the UPS is usually in the state of battery charging, and the inverter is switched to the working state when the power is off, and the DC power provided by the battery is converted into a stable AC output. Therefore, the backup UPS is also called offline UPS. The backup power supply is a quasi-line power supply for automatic driving that effectively prevents the driving circuit from having normal voltage. It can extend the voltage required by the circuit to provide the circuit to work normally.
With this backup UPS power supply, even in the event of a sudden power outage, it can provide an uninterrupted power supply to a single computer, computer network system or other power electronic equipment.
Can lithium batteries be used for backup power UPS?
Lead-acid batteries have been developed for more than 150 years. Because of their low cost, mature technology, and convenient maintenance, they have been the most widely used energy storage batteries in current communication power sources. However, lead-acid batteries are subject to theoretical characteristics and Product characteristics, it is difficult to improve significantly in the future.
The first is short cycle life. Even lead-acid batteries with relatively good cycle performance can frequently maintain a 1-year life in areas with poor grid quality and frequent deep cycle use. In addition, the life of a lead-acid battery greatly depends on its operating temperature. When the temperature increases, it accelerates the corrosion and water loss of the electrode plate, and the battery life also becomes shorter.
The second is low energy density. Occupying a large area, heavy weight, and high floor load requirements, these problems become more and more prominent with the continuous increase of data transmission volume of communication equipment.
Once again it is easy to steal. After being stolen, lead-acid batteries can be applied to a variety of occasions, and the lead content is high, and the recycling is convenient. These are the reasons for the theft of lead-acid batteries.
Finally, the issue of environmental protection. Lead pollution mainly occurs in the manufacturing and recycling of lead storage batteries, and one of the processes is to melt the lead. Melting and recycling processes are prone to contamination. According to Perry Gottesfeld, president of the Professional Knowledge International Association. In fact, for the lead storage battery industry, what is more likely to cause pollution than the production process is the recycling process.
Therefore, there is an urgent need to excel in performance, and the overall cost will not increase too much energy storage to replace traditional lead-acid batteries. At this time, lithium batteries have entered people's sight.
Lithium batteries have low self-discharge and no memory effect. Adding a protective plate to the lithium battery in the production of lithium batteries can make the lithium battery have an overcharge and overdischarge effect.
The energy and density of lithium batteries are also high for other batteries. Lithium batteries have high energy storage density. The density of commonly used lithium batteries can reach 450-620Wh / kg, which is 5-7 times that of lead-acid batteries.