Uninterruptible power supply

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battery overview

Battery Overview
A battery is a device that stores energy while it is being charged and releases energy while it is being discharged. There are a lot of different battery technologies, but lead acid batteries, which consist of plates of lead dioxide and spongy lead, immersed in a sulphuric acid solution contained in a durable housing, are most appropriate for use with inverters and mobile power solutions. Lead acid battery technology has come a long way since 1859, the year it was invented.  You no longer have to check the state of charge with a hygrometer, or top the batteries up with distilled water.  Batteries are now safer, more reliable and in some cases, virtually maintenance free.  Lead acid batteries are recommended for use with inverters/UPS because:
• They are low cost, widely available and easy to manufacture
• They are durable and dependable when properly used and stored
• The self discharge rate is lower than that of other battery technologies
• They can produce a lot of current very fast, which is important in inverter applications

 

Q1. What is Three-Stage Charging?
A1: Multistage charging ensures batteries receive optimum charging, but with minimal wear and tear, regulating the voltage and current delivered to the batteries in three automatic stages:
1. Bulk: Replaces 70-80% of the battery’s state of charge at the fastest possible rate.
2. Absorption: Replenishes the remaining 20-30% of charge, bringing the battery to a full charge at a slow, safe rate.
3. Float: Voltage is reduced and held constant in order to prevent damage and keep batteries at a full charge.


Q2. How about Battery issues-maintenance?
A2: Although the applied battery is maintenance-free type, it would be still necessary to have the battery used with a correct usage. The correct usage is that the battery energy should not be used up usually when a blackout happens, and more, always put the battery in charging right after discharging. If you are not going to replace battery periodically, you may make self-test by pushing the test button for the purpose, or by pulling out power cord for simulating a blackout; then you'll find that if the battery energy is left enough for your computer use. Once the left energy is not able to provide the required backup time, the battery has to be replaced.


Q3. What is the effect of different charging currents on batteries?
A3: A higher charging current can shorten charging time. However, a higher charging will cause more heat and gas inside the battery and could result in thermal runaway. The suggested charging current for our battery is 0.3C.
 

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