pbq ® VRLA Batteries Introduction Leading in quality
VRLA Batteries GENERAL FEATURES APPLICATIONS High Quality & Reliability The pbq VRLA battery has a constant and reliable performance. It can be easily maintained to provide proper operation of the equipment that it powers.
VRLA Batteries TECHNICAL TERMS BATTERY STORAGE 1. Battery capacity for small VRLA batteries, accepted by worldwide convention, is described in “Ampere Hour” at the 20-hour rate (C20) when discharged at 25°C. For a pbq 4-12 at C20 this battery will deliver a current of 200mA during 20 hours to a cut-off voltage of 1.75 volts per cell (10.5 volts per battery). Please note that for some larger pbq batteries the capacity is shown for a discharge time over 10 hours (C10). 2.
VRLA Batteries charging batteries that are stored at temperatures other than room temperature, a charger that accordingly compensates the charge voltage should be used. The slowest practical rate of discharge for a lead acid battery is self discharge. As the current is very low, the fully discharged voltage is high, i.e. the battery is flat at 2.00 – 2.03Vpc. Therefore a program of stock control must be introduced to ensure that batteries are recharged well before that voltage is reached.
VRLA Batteries Note: A faster recharge may be obtained by using the constant current method of charging. However, this requires a closer supervision of the charging procedures. Less than 6 months from manufacture or previous top up charge: Maximum of 6 hours at a constant current of 0.1C. Up to 12 months after manufacture or previous top up charge: Maximum of 10 hours at a constant current of 0.
VRLA Batteries BATTERY SELECTION BATTERY CHARGING The battery discharge graphs on the individual data sheets can be used for battery selection. The data sheets show the actual ampere hour capacity of each battery type at various discharge currents and cut-off voltages. It is suggested that a review is made together with your pbq distribution partner in case of any questions. Correct battery charging ensures the maximum possible working life for the battery.
VRLA Batteries that is higher than recommended, pressure build-up can occur resulting in opening of the vents and release of gasses. C h a r g e Vo l t a g e & C u r r e n t Tw o S t a g e C h a r g i n g Important in order to minimize the gas emitted from the VRLA battery is the use of the proper float charging voltage of between 2.27 and 2.30 volts per cell and limited use of the equalization voltage of 2.4 volts per cell. As the charging voltage per cell is increased above 2.
VRLA Batteries Due to the low internal resistance (RI) of the battery, the resulting AC ripple current can be very large, up to 100 times as large as the DC float current and result in significant heating (Irms2Ri) of the battery. Since the battery service life is reduced by 50% for every 10°C above its rated operating temperature of 25°C, any long term increase in its temperature should be avoided.
VRLA Batteries 4. 5. 6. 7. with the eyes, wash them thoroughly with large amounts of clean water, and consult a physician immediately. Batteries can explode if put into a fire. Never dispose batteries in a fire. Mixed usage of batteries differing in capacity, type, manufacturer or history of use (charge/discharge operation) may damage the batteries and the equipment due to the difference in their characteristic values. This practice must be avoided at all costs.
