Design of battery charger dedicated the Battery Carrier - Proposal of simple parallel connection

Abstract

Lithium ion batteries are incredibly popular these days. Lithium ion batteries have extremely high energy density, so if charge and discharge are not performed with precise control, battery life is shortened. In extreme cases it bursts or ignites.Therefore, accurate charge control is necessary. The lithium ion battery targeted in this research has 84 cells with a nominal voltage of 4.2 volts, fourteen of cells are connected in series, and six of them are connected in parallel. In addition, it has CAN communication function and can send the state of the battery to the outside. At present there is a charger for that one battery, but there is no charger that charges multiple batteries at the same time. In this research, we aim to develop a battery charger that can charge multiple batteries simultaneously by using data obtained from CAN bus.