Constant-Temperature Constant-Voltage Method for Li-ion Batteries to Reduce the Charging time

EasyChair Preprint 4191

Abstract

Lithium-ion batteries have high energy density, high specific energy, good cycle life, low self-discharge, and are environment friendly. Because of these qualities, they have emerged as a popular rechargeable battery chemistry with a wide variety of applications in portable electronics, electric vehicles (EVs), grid energy storage, and renewable energy. Open –loop approach is the largely used technique for charging Li-ion batteries, where the prior knowledge of cell parameters can be used to predefine the charge profile. Closed loop charging technique is in need, the charging current magnitude can be modulated using instantaneous cell voltage and temperature. Compared to constant-current constant-voltage (CC-CV) technique the closed loop technique achieves 20% fast charging. Under the given total charge time it causes 20% lower temperature. Closed loop technique can charge large capacity battery with less time. In smart phone charging this technique maintains temperature while fast charging.

Keyphrases: Closed-loop charging, constant temperature charging, fast charging, temperature control.

@booklet{EasyChair:4191,
  author    = {B. G. Nishchitha and G. H. Kusumadevi},
  title     = {Constant-Temperature Constant-Voltage Method for Li-ion Batteries to Reduce the Charging time},
  howpublished = {EasyChair Preprint 4191},
  year      = {EasyChair, 2020}}