VRLA battery Substation Operation and Maintenance(d)

2.3.3 Valve periodic toshiba laptop battery maintenance measures
2.3.3.1 are regularly recharged. Charging pressure are used 2 35V / monomer ± 0 02V. Every three months to 6 months should have one charge times should be normal float voltage difference depending on the extent to decide. Both the charging time is generally 8 ~ 12h. The purpose of a regular basis are charging are: the elimination of temperature changes without a timely amendment to float voltage change; portege 4000, satellite a10 series battery float voltage regular discharge but should not the stipulated period of time sufficient for its electricity.
2.3.3.2 periodic amendments to the battery float voltage value system
Because of the battery float voltage value system influenced by temperature, so the battery system should be based on the use of ambient temperature changes in a timely amendment of the charging voltage value system. Annually adjust the general settings 2 ~ 4 times. Adjust the standard as follows: the ambient temperature increased by 1 ℃, the lower the float voltage 0 003V / monomer; ambient temperature every 1 ℃ lower, the higher float voltage 0 003V / monomer. Battery operation in high-temperature environment (greater than 30 ℃), because of the satellite a100, satellite a70 battery internal resistance become smaller, more efficient battery charging, battery capacity will increase. Therefore appropriate to reduce float voltage value, reducing the float current, battery capacity is not affected. When the battery is running low ambient temperature (20 ℃ below), the battery inside the lead sulfate solubility and dissolution rate of lower electrolyte concentration polarization increases at the same time by the electrolyte resistivity increase caused by the change of the battery internal resistance, so the requirements in low-temperature conditions have a higher charge voltage, in order to meet the charging requirements. Otherwise it will create less than the phenomenon of charge.
2.3.3.3 regularly check discharge test
A post-mortem at a floating battery system of long-term work, because of the excessive negative electrode active material composite design and the existence of oxygen, resulting in negative plates have a part of the total active material in less than a state of charge, but also because of the long-term float current and not enough to make a very small board within the active substances are fully electrochemical reaction caused by the internal electrode active material sulfation, thereby reducing the capacity of negative electrode plates so that satellite a75, satellite 1900 battery life be affected. To avoid these phenomena, for the long-term job in a floating state of the battery charging system should be different depending on the status of job to take every 6 months or 12 months to check one times of discharge test. When the 6 months one time when the discharge depth of discharge can be more shallow, should adopt the 30% ~ 40%, if 12 months may be appropriate when discharge test some better advised to 50% ~ 60%, in-depth understanding will be easily observed battery system breakdown monomer battery.
3 Concluding remarks
In short, the VRLA battery maintenance is very important, according to valve-regulated lead-acid batteries of different characteristics, in view of the impact of VRLA battery life of the main factors, and continuously improve the level of maintenance to enhance the purpose of satellite a60-662, satellite a65 series life to improve the operation of substation DC system reliability, to ensure the safe operation of power grids.