BATER bi-directional recombination plug RecPlug2 for OPzS batteries

BATER Bi-directional recombination plug RecPlug2 reduced requirements of ventilation to the level required by the VRLA batteries.Bi-directional recombination plug  combine the advantages of classic batteries – more than 20 years of lifetime stability, reliability and predictability of action with the advantages of VRLA batteries – no need for refilling water loses, small risk of explosion and the possibility of operating in the same room as other devices. To meet these expectations, the company developed a new generation recombination plug regulated with a valve for external gas recombination in lead acid batteries.



Maine features

  • LIFETIME – more than 20 years. Classic batteries with recombination plug have much longer life than VRLA batteries, in which it is not possible to refill water.
  • SAFETY– reduced requirements of ventilation to the level required by the VRLA batteries, the minimum emission of harmful gases from the liquid electrolyte, fading the flame back, two-way adjustable pressure inside plug protects the system from mechanical damage as a result of uncontrolled growth or drop in pressure, the possibility of charging the battery at increased voltage with new design plug. Flame arrestor prevent external flames from penetrating the cell. Bi-directional recombination plugs are resistant to overload.
  • ECONOMY– significantly reduced the frequency of water refilling (12-15 years topping-up interval), recombination plugs are optimized to work in full lifetime of the battery.
  • FLEXIBLE – the ability to match amount of plugs to specific capacity of batteries.

Bi-directional recombination plug principle of operation

When using lead acid battery as a result of electrolysis of an aqueous electrolyte solution are separated hydrogen and oxygen. These gases in air may form explosive mixtures. Additionally the electrolysis reduces the amount of water in the electrolyte, which must be relatively frequently replenish in the battery. The conversion of hydrogen and oxygen in steam is an exothermic process. The heat emitted during the recombination process inside the sealed battery significantly accelerates the degradation of the lead electrodes immersed in an electrolyte. Therefore, the process is preferably carried away from the recombination with the electrodes, thus increasing the life of the entire battery. The innovative design of the gases generated during the electrolysis of water from the electrolyte when it reaches the plug in a controlled manner are converted into steam. Water vapor then condenses on the walls of plug. After cooling, as the water flows back into the battery. In order to achieve the most efficient gas recombination plug except the construction of a special catalyst system was also used bidirectional valves which automatically regulate the pressure inside the unit to achieve the best value. In order to maintain safe operation of the system pressure regulator over is mounted flame arrestor in the plug in addition to the single fuse hydrogen, in the form of a ceramic flame screen. In such designed plug gas emissions is minimal and safe for the surrounding environment. New recombination plug with two-way valve system, while maintaining the proper operation, maintenance reduces the frequency of replenishing the electrolyte level in the battery. New design of recombination plug increases the safety of the battery in areas with limited ventilation while maintaining the level of gas recombination at the highest possible level.

Application requirments.

For appropriate operation  of  recombination plug the cell must be  properly sealed .  Special construction of  pillars’ grommets and precise gluing of lids – confirmed with pressure test – causeshat recombination plugs  are  excellently working with SLA  BATER  cells (OPzS and SOPzS).

Dimensions and technical parameters

Bi-directional recombination plug typeCell capacity
Qnom [Ah]
Max charging voltage
Diamiter A
Diamiter B
Diamiter C
Height H1
Height H2
RecPlug2-500up to 5002,425405313211
RecPlug2-1000up to 8002,425405313211


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