The Improvement of the Efficiency of 3-Wheel Small Electric Motorbike Batteries for Household Uses

Abstract

This research aims to study the improvement of the efficiency of 3-wheel small electric motorbike batteries for household uses and compare the efficiency of lead-acid batteries to lithium-ion phosphate (LiFePO₄) by test drives with different three speed levels. The differential-drive electric vehicle of 500 watts, with the width of 160 cm, the length of 108 cm and the height of 69 cm was used. It was installed with a speedometer, meters for voltage, wattage, and electric current, and lithium phosphate battery power of 48 V 20 A, along with the charge control circuit and battery capacity of BMS (48 V 16S). The study found that after the improved lithium-ion phosphate battery pack was installed, the weight of the battery was decreased 15.61 kg or 59.02 %, and the movement test of a cannon cycle decreased 5 hours or 37.50 %. With the different speed levels (slow, medium, and high) under three time speed average, after the distance, time, and the top speed of the vehicle were measured, it revealed that the mobile performance of lithium-ion phosphate battery was 19.60 %, 33.63 % and 30.27 % better than that of lead-acid batteries. In addition, its shape and weight were reduced, and the battery could be charged more than 2000 cycles, without the formation of a chemical, and acid vapor which caused inflammation. Also, the battery was easy for maintenance and the material used was environmentally friendly. It could be recycled. This is the prototype of the electric vehicle industry, and it also helps promote the use of electric vehicles in the country.