Powerbank from E-waste: Constructing a 220v Power Bank from Discarded Laptop Battery

Abstract

INTRODUCTION

Garbage disposal is one of the problems of the country. Electronic waste like laptop batteries is one of those waste materials that should be given attention on proper disposal. There were tons electronic wastes being disposed and bring harm to the people residing near the site. In this study, we would like to lessen the electronic wastes and turn it to a useful device. The developed portable 220-power bank from discarded laptop lithium-ion battery was constructed to produce electricity for emergency purposes. The device's practical use during calamities where there will be no electricity would be recommended.

METHODS

The study started with a layout plan of the device. It is followed by gathering of the needed materials for the projectconstruction. The lithium-ion batteries were tested according to voltage and arranged in a series-parallel connection to achieve the desired voltage (12 V).Batteries were soldered and covered with masking tape that served as an insulator. An inverter wasinstalled to convert 12 V of electricity to 220 V output.Then necessary wiring wasinstalled for 5V USB charger output for cellphone charging, 220V AC output for appliances, 12V load terminal for 12V DC appliances, DC voltmeter and exhaust fan. Each output has individual switches for efficient voltage management. The chassis used in this device was an old case of microphone for portability that it could be carried anywhere in any situations.

RESULTS

The developed device was subjected for actual battery run time testing on the common appliances and gadgets such as television, electric fan, laptop, projector and cell phone for charging purposes. Based on the results, the actual battery run time of constructed device shows a close result compared to the computed battery run time.

DISCUSSIONS

Based on the result, the computed run time of 75watts ceiling fan is 2.67 hours; 45 watts televisionis 4.44 hours; 170 watts projector is 1.18; 4 watts mobile phone is 50hours and a 65 watts laptop is 3.08 hours .The formula of getting the total run time ofpower bank is r=10 x Ampere Hour / P (run time is equal to the product of 10 and Ampere Hour divided by power consumption in watts). It was observed that the gadget/appliances with smaller wattage consumed less electricity therefore, have longer run time. Thus, appliances with high wattage consumedshorter run time.