A battery is basically an electro chemical device capable of converting chemical energy into electric energy and storing it for future use. Several types of batteries are in use for different purposes of which lead-acid deep cycle wet batteries are largely used in golf carts. The expression ‘deep cycle battery’ is self explanatory that the chief consideration is regular optimum deep discharge of its capacity. The purpose, design and construction of the deep cycle batteries used in golf carts are different from those of cranking batteries used in cars. Though both work on the same principle, composition and chemistry, there are vast variations in the functioning.
Deep Cycle Battery Recharge Cycle
A car battery needs to generate surges of huge amount of power capable of turning on the engine for a short duration. Once the engine starts, alternator takes care of the power requirement of the car. Thin lead plates increasing the surface area are used to achieve the surge of power. The design discourages total discharge of battery and you never use more than 20% of its potential capacity. But a deep cycle battery is required to produce moderate amount of power steadily for longer duration. Its power is drained down more frequently up to 75% requiring several deep discharge-recharge cycles. Thicker active plates with high density active paste material and durable separators are preferred to withstand hundreds of these complete cycles. Thick plates enable extended charge-recharge cycles thereby resisting corrosion and improving life expectancy.
The rating of batteries is done on parameters of Cold Cranking Amps (CCA) and Reserve Capacity (RC).CCA is calculated on how many amps a battery can produce for a duration of 30 seconds at 32 degrees F temperature. RC is the duration that the battery can steadily provide 25 amps maintaining the voltage over 10.5 volts. The sturdy deep cycle batteries will have two to three times more RC than the car batteries but can provide only a half or less CCA of the car batteries. The capacity of the battery is estimated in amp-hours (AH). Capacity of one amp for one hour is called an amp-hour. If the battery gives out 20 amps for 30 minutes, the amp-hour rate would be 10 [20 (amps) x .5 (hours)].The choice of batteries done on the basis of these parameters.
Deep cycle batteries require regular maintenance and charging schedules. Water levels from the electrolyte in these flooded batteries may deplete owing to decomposition during charging. Regular inspection of electrolyte level with proper periodic supplementation of water is mandatory as maintenance procedure. Failure of deep cycle batteries is often attributed to the factor of corrosion and shedding of the plates resulting in loss of active materials. The life of a deep cycle battery depends on the depth of discharge and the number of discharge and recharge cycles. Much used and often recharged batteries may suffer in performance. Even during charging for every 1000 watts discharged form battery 1100 to 1250 watts may be required for a full recharge. These variations often occur depending on the maintenance and recharging procedures. An overwhelming 97% to 99% of recycling potential of a majority of these lead-acid deep cycle batteries is an added advantage to recommend them.
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