Daily battery inspection

by:Power Kingdom     2021-07-07

  Daily battery inspection

   The contents of the batteries that need to be checked regularly are as follows:

  1. Terminal voltage;

  2. Whether the joints are loose, heated, or corroded (clean up in time and take anti-rust measures);

  3. Whether there is leakage and deformation of the battery shell;

  4. Whether there is acid mist escaping around the valve stem and safety valve (frosting phenomenon) ).

  二. The main purpose of the battery

   The sealed battery does not need to be charged before use, but it should be charged. The charging method should be current limiting and constant voltage charging, and the charging voltage should be implemented in accordance with the specification. In general, the charging voltage and charging time are as follows (the battery is stored for no more than half a year, and the ambient temperature is 25°C).

   cell voltage (V) charging time (H)


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  2.3/2.33V1/2 days

  Under other temperature conditions, the charging time should be adjusted appropriately. If the ambient temperature is between 10°C and 20°C, the charging time should be doubled. If the ambient temperature is higher than 25°C, the charging time should be shortened.

   Third, the floating charge voltage of the battery.

   When the ambient temperature is 20?29℃, the average floating charge voltage of the battery is 2.23 volts per battery. The floating charge voltage can be determined in different temperature ranges according to the following standards:

  ambient temperature (℃) floating charge voltage (V)

  The first three digits are product symbols, and'LC-' means valve-regulated (sealed) lead-acid batteries. The 4th letter of No.4 is the battery characteristic symbol, and the specific meanings are as follows: R: Small valve control (sealed) general product V: Small valve control (sealed) general product, non-flammable electric tank product X: Expected 6-year life product P: 6-year life expectancy, non-flammable electric tank product Q: 13-year life expectancy, non-flammable electric tank product No. 5, the 5th letter is the same model, the same capacity but different shape The product distinguishing mark. When no distinction is necessary, this English letter can be omitted. For example, LC-RLC-XANo.5to6 (or No.6to7) 2 Arabic numerals indicate the nominal voltage of the battery, '12' indicates that the nominal voltage of the battery is 12V, and '06' indicates that the nominal voltage of the battery is 6V. No.7to9 (or No.8to10) 1-3 Arabic numerals represent the rated capacity of the battery, where'R' represents the decimal point. For example, '7R2' means the rated capacity is 7.2Ah, and '100' means the rated capacity is 100Ah. If the terminals of the medium-capacity battery are bolt-type terminals, add an'A' after the above model to indicate. No.8to12 uses 1-2 letters at the end to distinguish the battery’s trademark printing and the packaging box printing style. For small batteries, add an Arabic numeral at the back to distinguish the terminals. '1' means 250M terminals, and '3' means 250 terminal, 187 terminal without a number. According to the above numbering rule,'LC-R127R2ST1' indicates that the valve-regulated (sealed) lead battery is a small valve-regulated (sealed) general product, with a nominal voltage of 12V, a rated capacity of 7.2Ah, Chinese packaging box, and 250M terminals.

  一About charging

  1. When floating charging, please use the charging voltage 2.275V/single cell (20℃ The setting value at the time), constant voltage charging or constant current charging with current less than 0.002CA. When the temperature is below 0C or above 40C, it is necessary to correct the charging voltage. With 20C as the starting point, for every degree change, the single cell voltage changes -3mv.

  UPS battery

  2, when cyclic charging, the charging voltage is 2.40-2.50V/single cell (at 20℃ Set value), charge with constant voltage and voltage. When charging at a temperature below 5C or above 35℃, start at 20℃, and adjust the charging voltage to -4mv/cell for every degree of change.

   The initial charging current is controlled below 0.25CA.

  The charging capacity is set to 100-120% of the discharge capacity, but when the ambient temperature is below 5C, it is set to 120-130%.

  The lower the temperature (below 5C), the longer the charging end time, and the higher the temperature (above 35C), the more likely it is to overcharge. Therefore, especially when it is recycled, it is at 5C It is better to charge within ~30C.

   In order to prevent overcharging, try to install a charging timer or automatically switch to trickle charging.

   The battery temperature should be controlled within the range of -15C~+40C when charging.

  二About discharge

   Please control the battery temperature within the range of -15℃-+50℃ when discharging.

  Please control the continuous discharge current below 3CA (H control below 6CA).

  The end-of-discharge voltage varies according to the magnitude of the current, which is roughly as follows. When discharging, the voltage should not be lower than the following voltage.

  Please charge quickly after discharging. If you accidentally over-discharge, please charge it immediately.

   discharge current

   discharge termination voltage

  0.2CA Full

  1.75CA/single cell

   more than 0.2CA and less than 0.5CA

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  1.70CA/single cell

   more than 0.5CA and less than 1.0CA

  1.55CA /Single cell

  1.0CA or more

  1.30CA/single cell

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