Selected for manufacturers in the configuration storage battery, the design capacity is not fully meet the even more than load power supply power supply for power capacity and time requirements, but in UPS operation, users often find UPS after the mains power failure is not the actual time of the power supply is much less than design value, the causes of this phenomenon, in most case, it is not the original configuration when spare capacity of the battery is not enough, but the capacity of the battery did not play out. The cause of the actual capacity of the battery to reduce a lot, have a battery quality problem, but more is to use and maintenance problems

Lead-acid battery plate in the manufacturing process, charging into opposite plate, it is the lead on the plate into lead dioxide, lead the lead on the negative plate into a cavernous, but manufacturers for plate into time is limited, not all material can be converted into active substances, therefore, the domestic new battery to 90% capacity of qualified standard regulation, only in the following in daily use, capacity gradually to normal, installation requirements after two years at 100%.

 

The rated capacity of the battery pack is under the provisions of the discharge rate, for example, a small battery used in UPS power supply is one of the typical specifications of l2V, 6 ah / 2 ohv, this specification is defined as the output dc voltage l2V, nominal capacity is 6 ah, discharge rate conditions for 20 hr. Specific meaning is: the output dc voltage l2V battery pack placed in 20 h discharge under the condition of constant discharge rate, has been in its output voltage from l2V l0.5 V, measured by the total hours should be 6 ah.