A Multi-objective Optimization Charging Strategy for Lithium Ion Battery Based on Lithium-plating Inhibited Model

Abstract

With the popularization of electric vehicles, the problem of safe and fast charging of lithium ion batteries must be settled urgently. The existing fast charging minimize charge time, whereas battery health is out of consideration. Constantcurrent (CC) charging with large charge rate (C-rate) leads to irreversible damage to battery life, which reduces chargedischarge cycles and increases cost. In this study, a multi-stage constant-current charging strategy considering charge speed, charge loss and the safety of battery is proposed, which is based on lithium-plating inhibited (LPI) model and optimized by particle swarm optimization (PSO) algorithm. Compared with traditional CC charging methods at different C-rate, the results show that this approach can charge the battery quickly without lithium-plating, which holds promising for longer battery life.