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Friday, February 11, 2011

It is universally acknowledged that lithium-ion laptop battery has complex structure in tabs design. Under high multiplying power, we have to adjust this part automatically to be adapted to external conditions. Normally, several tabs will be welded into electrode pole piece in winding structure. Therefore, inside the batteries, resistances can be reduces and separated to diverse districts.



Comparatively speaking, lamination needs to have a reversed tab design structure in lithium-ion laptop battery chips. There’s an anode and cathode tab in either side and then connect both by stables to discharge in a large output current equably.



It is said that as to fixed shape, multifold tabs installed inside lithium-ion external laptop battery will reduce the nominal capacity and vice versa. After sealing standards increasing in aluminum-plastic diaphragm, some undesirable phenomena are likelier to emerge between diaphragm and tabs to lead to short circuit, flatulence, leakage and other hidden dangers. In most cases, manufacturers prefer to use electrode of both sides in tab design while same side for larger laptop batteries, which can meet the requests of maximum discharge current.



Great mass of investigators are prepared to improve laptop battery multiplying power through tabs, electrode and electrolyte materials. After optimizing its prescription, someone has cranked out the batteries of 1100mAh and 167℉ in max surface temperature and increased to 181℉ when magnification is adjusted to 23C. It has proved that discharge performance is possible to ameliorate by measures as above but hard to solve them from overheating which is related to cooling rate.



By improvement of discharge ratio, laptop battery capacity is reduced in a very low rate while no ballooning phenomenon will occur in 30C rate of discharge. Such a solution can prove the laptop battery is of good performance. According to analysis, in high-rate discharge, we can apply into brass tabs and rate of heat removal will be more effective.

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by: USB Phone World

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