Impact Of Discharge Current Of Rechargable NiMH Batteries On Charge Output In Accordance With Peukert's Law

Karınca, Kerim Doruk (2015) Impact Of Discharge Current Of Rechargable NiMH Batteries On Charge Output In Accordance With Peukert's Law. Other thesis, TED Ankara Koleji.

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This experiment report is based on the changing available charge capacity (electron count) of a battery by the average current demand, by using Peukert's Law. The battery capacity written on packaging wasn't found to be constant, as Peukert's Law states that high current demand from a battery decreases the number of electrons that the battery can provide. Thus, charge output and runtime aren't linearly correlated - current demands decrease the charge output in a curved fashion. The power that this curve is raised to is called the Peukert constant. This paper found the Peukert constant for GP 2700 Series Rechargable battery to be 1.174. The greater this constant is, the greater the electron losses. Results are directly applicable to battery performance. Increasing currents are found to drain the battery exponentially (eg. doubling the current empties the battery not twice, but more than twice as fast). Thus, making energy-e�cient mobile devices will not only save energy, but will make more potential energy available to the device. Most importantly, expecting to obtain the rated (advertised) battery capacity regardless of current is ungrounded, while capacity is a function of current draft abiding by Peukert's Law. This report analyzes 10 trials of collected current and runtime data by changing current drafts (through varying resistances) to utilize the mathematical model leading to the calculation of the Peukert constant.

Item Type: Thesis (Other)
Additional Information: Supervisor: Mine Gökçe Şahin, IB Notu: C
Uncontrolled Keywords: charge capacity, Batteries, Peukert's Law
Subjects: Q Science > QC Physics
Depositing User: Kamil Çömlekçi
Date Deposited: 26 Aug 2015 08:04
Last Modified: 26 Aug 2015 08:04

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