Zapping and Its Impact on Battery Power

18 Jun

Battery zapping is a procedure where the individual cell is acted upon by a high energy impulse. Zapped cells have a lesser internal resistance and therefore retain higher terminal potential at modest to elevated current loads. This provides significantly greater power and performance than ordinary cells. There is no loss of capacity or useable life. Zapping is a procedure that brings dead batteries to life on the application of high current or voltage. This technique works practically well with nickel cadmium batteries when an elevated pulse current is applied to them. A nickel cadmium battery is rechargeable so the battery should be reusable for more than 100 charges under steady use. Three things that unfavorably influence battery charging are allowing a cell to become totally discharged, putting the cell on a charger in next to no time and overcharging. Crystals can develop inside rechargeable batteries that avert them from sustaining the charging process or keeping a charge for a customary span of time. This makes them an inappropriate choice for manufacturing batteries of notebooks and netbooks. Big companies like Dell, Toshiba, Sony, HP and Lenovo have switched to lithium ion batteries for making their laptop batteries. At times, a nickel cadmium battery can be re-energized and restored to regular overhaul. After a phase of time, the insulator within a Nickel Cadmium battery frequently develops holes which permit the battery to cultivate crystalline shorts that offer a transmission passageway between the positive and negative electrodes of the cell (which basically shorts out the cell). If this happens, you may have to waft open this short with a high current pulse before the cell will again allow charging. This process is sometimes referred to as zapping. A leaky Nickel Cadmium cell will constantly have an elevated self-discharge rate and will again grow in-house shorts if left on the ridge without some sort of trickle charge. The frustrating feature of batteries that die rapidly frequently prompts customers to fling away leaky Nickel Cadmium batteries, even though they may still be capable of giving almost full A.h capacity during discharging process.

Zapping is believed to augment the cell potential by 0.02 to 0.04 V when calculated under a 30 A load. This would amplify the battery potential from 1250 mV to about 1280 mV. According to specialists, zapping works only consistently with Ni Cd batteries. NiMH batteries have been tested but the consequences are open to doubt. The zapping process is performed with a 47 F capacitor charged to 0.09 V. Finest results are attained if the battery is cycled two times after healing, and then zapped another time. Once in examination, zapping will no longer develop the battery performance. In fact, zapping does not rejuvenate a battery that has become feeble.

Companies focusing in zapping batteries use best quality Japan manufactured nickel cadmium cells. The cells are specially selected at the factory. Particularly labeled, the batteries turn up in a discharged condition with an open terminal voltage of 1110 to 1120 mV. If below 1060 mV, the cell is doubtful and zapping does not perform well. A low voltage value may clue to a high self-discharge or chemical shortages. The 1110 mV is formed through the electrochemical voltage of the nickel cadmium battery. This potential is present even without any charge. Application of a load can cause the open circuit voltage to fall down.

There are no obvious drawbacks to zapping but still the battery producers stay ambiguous. No scientific elucidation is accessible and only slight information is there about the long life of the batteries after service.

The following are some of the guidelines that must be followed to elongate the lifespan of Nickel cadmium batteries in particular:

– Do not leave a nickel based battery in a charger for more than 24 hours with the ready light on. It is better to take out the battery from the charger and apply a charge before using.

– Apply intermittent discharge cycles. Running the battery down in the apparatus may also do this.

– It is not compulsory to discharge the battery before each charge. This would put too much pressure on the battery. And this is what companies like Dell, Toshiba, Sony, HP and Lenovo suggest for their laptop batteries

– Avoid high temperature. The battery should cool off and stay at moderate temperature after being fully charged.

– Use good quality chargers. This is true for highly specialized applications like laptops, batteries of notebooks and netbooks, cell phones etc.


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