Technical requirements for valve-regulated sealed lead-acid batteries in communication base stations
Structural characteristics of valve-regulated sealed lead-acid batteries
tightness
less maintenance
Compact structure, small size, can be stacked and installed in multiple layers, occupying a small area.
No flowing electrolyte (adsorption type), can be placed horizontally.
The valve-regulated sealed battery has been charged when it leaves the factory, and it can be put into actual operation after a little supplementary electricity after installation, which is more convenient to use.
Main technical performance and requirements of valve-regulated sealed lead-acid battery
Capacity calibration: The capacity of the battery is represented by the 10h rate rated capacity under the condition of ambient temperature 25°C and monomer discharge termination voltage 1.8V.
Float charge service life: at an ambient temperature of 25°C, the service life of 2V float charge is 8 years, and that of 6V and above is 6 years.
Cycle life: the number of times at 100% depth of discharge
Float voltage: 2.23～2.27V/pc.
Equalizing charging voltage: 2.30～2.35V/pc.
Capacity preservation rate: The capacity preservation rate of the battery after 28 days of standing still is not less than 96%.
The balance of the battery terminal voltage: for a battery composed of several cells, the difference between the highest and the lowest open circuit voltage of each cell is ≤20mV.
Voltage drop of battery connection bar: The battery is discharged at a rate of 1h, and the voltage drop of the connection bar between the batteries measured at the root of the two battery poles is ≤10mV.
Anti-acid mist performance: The battery should not escape acid mist during normal operation.
Explosion-proof performance: the battery should not detonate if there is an open flame in the charging process
The use of valve-regulated sealed batteries
normal environmental conditions
Valve-regulated sealed batteries should work continuously under the following conditions.
Ambient temperature: -5℃～40℃.
Relative humidity: ≤90% (25°C).
Altitude: ≤1000m.
Installation method: indoor fixed installation.
Charging voltage
Float voltage: 2.23～2.27V/pc.
Equalizing charging voltage; 2.30～2.35V/pc.
Charging and Discharging of VRLA Battery
Charging and Discharging of VRLA Battery
Sealed batteries do not need to be initially charged before use, but supplementary charging should be carried out. The supplementary charging method and charging voltage should be carried out according to the product technical specification. Under normal circumstances, constant voltage and current limiting charging should be adopted, and the supplementary charging current should not exceed 0.2C10 (C10 = rated capacity of the battery)
Equalization charging of valve-regulated sealed lead-acid batteries:
Under normal circumstances, when the sealed battery pack meets one of the following conditions, it should be uniformly charged (if there are special technical requirements, the product technical specification shall prevail), the charging current shall not exceed 0.2C10, and the charging method shall refer to the charging time-voltage comparison table .
There are more than two float voltages lower than 2.18V/one.
Shelved for more than three months. The depth of discharge exceeds 20% of the rated capacity.
The criteria for charging termination of sealed batteries are as follows, and when one of the following three conditions is met, it can be regarded as charging termination:
The charging capacity is not less than 1.2 times of the discharging capacity.
The charging current in the later stage of charging is less than 0.01C (A).
In the later stage of charging, the charging current does not change continuously for 3 hours.
