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02 Management of battery for industrial use

Characteristics of battery for industrial use

  • It is convenient since there is no need for separate maintenance since it is a completely sealed type maintenance free battery without leakage.

    • There is absolutely no need for maintenance since there is no reduction in the electrolyte because the gas generated through the electrolysis of water during charging is absorbed by the electrodes without being discharged externally.
  • Can be used safely by installing it anywhere as there is no leakage of electrolyte

    • Electrolyte in gel form is impregnated into the special separator thereby preventing the leakage of electrolyte at all and gas generated due to over-charging is reabsorbed by the electrodes. Therefore, there is absolutely no leakage of electrolyte and acid mist externally during normal usage.
  • No risk of rupture during use

    • There is severe generation of gas during overcharging and execution of inappropriate charging method. However, SLD battery has safety valve installed to prevent the internal pressure increase, it is designed to be used safely even in the event of the generation of gas due to abnormal use.
  • Self-discharging was minimized

    • Through the development of special Pb-Ca alloy, the period of storage without charging is extended by about 1/3~1/4 due to the reduction in self-discharging by the same amount in comparison to the Pb-Sb alloy.
  • SLD battery with low internal resistance and efficient discharge characteristics is used for multiple applications.

    • It is used for Cycle Service for which charging/discharging is repeated generally and emergency power source (Standby) for which charged state is normally maintained and undergoes discharge when needed.
  • Economical due to long lifespan

    • When it is used for Cycle Service, the lifespan of the battery at 50% depth of discharge (DOD) is more than 800 cycles and minimum of more than 5 years of lifespan is guaranteed when used for emergency power source (Standby). In addition, as it is equipped with appropriate price, low maintenance cost, light weight and high performances, it is possible for our customers to reduce the cost of the electric power supply equipment.
  • Can be used safely due to the cover made of fire-prevention materials

    • It can be used even more safely through the use of fire retardant ABS resin (V-0grade) for prevention of fire.
  • No need for equalizing charge

Management of battery for industrial use

Preliminary and follow-up inspection for the battery charging facility

  • Prevention of overcharging by inspecting the maximum set input current (inspection of the maintenance current and actual input current)
  • Management of set charging voltage according to the temperature (recommended temperature: 20±5℃)

For cycle service

Temperature (℃) 0 10 20 25 30 35 Maximum charging current (A)
Charging voltage ±0.05V 2V 2.53 2.48 2.45 2.43 2.41 2.39 0.25C
12V 15.18 14.88 14.70 14.58 14.46 14.34 0.25C

For emergency power source (floating charge)

Temperature(℃) 0 10 20 25 30 35 Maximum charging current (A)
Charging voltage ±0.05V 2V 2.25 2.24 2.22 2.21 2.19 2.18 0.25C
12V 13.50 13.41 13.32 13.23 13.14 13.05 0.25C

Inspect battery voltage during floating charging

  • In the event of using the batteries by connecting several batteries together, if problem in any one of these batteries including abnormal voltage and characteristics occurs and left unattended for long time, it can impart adverse effects on the other connected batteries. Therefore, it is necessary to screen defective cell through regularly scheduled inspections, and check the balance between the cells through the measurement of internal resistance of each cells and take appropriate measures in accordance with the measurements obtained.

Status of charging according to OCV (No. of cells in the case of 12V*OCV)

OCV(V/cell) 2.14 2.09 2.06 2.02 1.97
State of charging(%) 100 80 60 40 20
  • Check presence of abnormality in operation including the external deformation of battery, smell of gas and others

    • Since excessive ambience temperature in use and charging current/voltage in general are the cause of the external deformation of and excessive generation of gas from the battery, check the ambient temperature and charging current (voltage) at the time of occurrence of the corresponding situation.
  • Method of management in accordance with storage environment

    • When lead battery is stored for long period of time, the cycle for supplementary charging differs depending on the surrounding temperature. Therefore, charging must be executed by considering the following.

Self-discharging quantity in accordance with storage temperature and allowed period of storage without recharging

Storage temperature (℃) 20 30 40
Self-discharging quantity (%/월) 2 6 10
Allowed period of storage (Months) 6 4 2

Cycle for supplementary charging and method in accordance with the storage temperature

Ambient temperature at the time of storage (℃) Cycle for supplementary charging Method of supplementary charging
15~20 At 6-month interval It should be charged at rated voltage(2.2V/cell) and rated current (0.1C10) for a period of 16~24. However, if the voltage is not restored after charging, take additional measures by contacting our company.
20~30 At 4-month interval
At 2-month interval 30~40

Inspection of battery for industrial use

Inspection of the conditions of operation of the battery chamber

  • Check the indoor temperature (standard for the appropriate temperature of heater / air conditioner: 20±5℃)
  • Check the ventilation status.
  • Check the effect of the exhaust heat of equipment (UPS and communication equipment, etc.) on the battery (external temperature of the battery)
  • If it is unavoidable to operate the battery in low or high temperature environment, there is a need to adjust the charging voltage through compensation of the temperature
    ⇒ Cell charging voltage + {(current temperature-25℃)*3㎷} (However, if the current temperature is higher than 25℃, subtract the compensation value and, if higher than 25℃, add the compensation value.)
  • Check the charging current (use clamp meter)

Inspect battery

  • Check the appropriate capacity and manufacturing date.
  • Check the installation gap between the products.
  • Check the exterior conditions of the product (front and back, crack, leakage and other damages)
  • Check the external temperature of the product (either touch with hand or use infrared light surface thermometer)
  • Check the status of connection of connecting cable and copper booth bar (If the connection is defective, supply of electric power is not possible and can cause fire through short-circuit, and defectiveness decision due to faulty contact, etc.)
  • Measure the internal resistance and take measures in accordance with the following table (the internal resistance increases in the event of faulty installation, terminal stage of the lifespan or abnormality in the product)
Standard for the average value of the entire cells Measures to be taken
130~150% Observation of the tendency is required
150~200% Execute precision inspection
More than 200% Abnormal (faulty product)

In the event of occurrence of abnormality as the results of inspection, make inquiries to our company or the sales outlet (agency). Do not detach or dismantle the product at your discretion under no circumstances whatsoever.

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