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UPS Backup Power Battery Solution for Telecommunications Tower


As a typical communication tool, cell phone, either ancient 2G or current 3G, depends on transit affiliation of signal tower to transmit microwave signal. Therefore, cellular phone tower has become a typical infrastructure facility in town or country.

1. Demand of backup power battery for cellular phone tower:

Cell phone tower is formed from signal-sending instrumentality, signal-receiving instrumentality, antenna feeder system, power source and monitor management instrumentality that ensures standard operation of communication line and no maintenance. Power offer includes not solely alternate current offer however additionally UPS backup facility to ensure continuous operation in case of power cut. Early power source uses lead acid battery as backup power source. as a result of environmental pollution, low specific energy, giant size and short lifespan of lead acid battery, Li-ion batteries are used on cellular phone towers undergoing construction or upgrade as their back power source system. Based on the above, out client needs li-ion battery pack as backup power, that may attain 2-hour continuous work once power outage and meet the necessity of long-run exterior work.

According to consumption power and conversion potency of the complete cellular phone tower system, 48V/65Ah battery pack may attain operating time needed by client. thanks to high voltage, capacity and operational temperature of the battery pack, Japan foreign Li-ion battery cells that were used. These cells have high overall consistency and inbuilt multi protection, as well as anti-explosion valve and PTC.

PCM protection system of power source contains:

 

  • ·         Overcharge and over discharge protection to single cell;
  • ·         Temperature, over current and short circuit protection to the complete battery pack;
  • ·         Balance system between single series battery.

Battery remaining capacity detection section includes a detection system and a display system. Detection is sort of precise in current-voltage operation mode. {lcd|liquid crystal display|LCD|digital display|alphanumeric display} screen may display battery charge and discharge status.

2. Backup power battery resolution for cellular phone tower:

Battery pack parameter: as per customer’s demand of 2-hour period with a load of 100W AC system, 48.1V/65Ah battery may work for one hundred fifty minutes with full load.

PCM parameters: with single cell overcharge, over discharge, over current and short circuit protection. Specific needs as follows:

  • ·         Single cell overcharge protection voltage: 4.22±0.25V
  • ·         Single cell overcharge recovery voltage: 4.15±0.50V
  • ·         Single cell over discharge protection voltage: 3.00±0.10V
  • ·         Single cell overcharge recovery voltage: 3.30±0.10V
  • ·         Over current threshold (10ms): 70A
  • ·         Charge balance current: 50±10mA
  • ·         Charge balance voltage: 4.18±25mV
  • ·         Battery temperature protection scope (recoverable): -20-60 
Short-circuit protection on battery pack.

Battery capacity monitor system function: with smart detection chip and alphanumeric display screen, monitor system allows for timely set display parameters, as well as battery current capacity, current capacity percentage, current battery voltage, charge current, discharge current, discharge remaining time, RSOC and ASOC.

Battery overall structure design: thanks to wide distribution space of cellular phone tower and outside surroundings, insulation, damp-proof and ageing& deterioration proof ought to be thought of on battery. Hence, glass plate and plastic bracket may be used as case body of Li-ion battery pack.

Secondary protection: the complete battery is supplied with protection fuse to stop short circuit from abnormal over current. Within the event of PCM system abnormity, fuse may interrupt output circuit of the complete battery pack.

Li-ion battery cell: use Japan original import cell, 18650 Li-ion battery cell /2500mAh/3.7V, that has smart safety and consistency to confirm reliableness of the complete battery pack.

3. Project Photos:



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