An analysis of the influence of high-frequency ripple currents on dynamic charge acceptance in lead-acid batteries

Abstract

This paper presents the results of an experimental analysis of the influence of high-frequency injected ripple currents on the Dynamic Charge Acceptance (DCA) performance of lead-acid batteries. A wide-bandwidth battery model, derived from real-world data is described, this being a hybrid of the standard Randles model and a high-frequency model previously presented in literature. A bespoke test procedure is introduced, based on the existing DCA Short Test profile (EN50342-6). The results demonstrate that the injection of ripple currents can significantly improve charge acceptance, whilst having no appreciable effect on the State of Charge (SoC) of the battery. This study further demonstrates the importance of knowledge of the impedance spectrum of the battery if the improvements in DCA performance are to be achieved with maximum efficiency and effectiveness.

An Effective Control for Lead-Acid Performance Enhancement in a Hybrid Battery-Supercapacitor System Used in Transport Vehicles

“…In [7], the study proposes a hybrid LAB and supercapacitor to provide an improved charging/discharging criterion using atom search algorithm (ASA) and fractional order proportional integrate-derivative (FOPID) control to solve sulphation problem in LABs and enhance its lifespan during TV operation. Smith et al [20] conduct an experimental evaluation for the effect of high-frequency ripple current and its impact on lead-acid battery DCA.…”

“…In addition, a significant variation of temperature causes battery self-discharge. Moreover, the battery voltage hinge on SoC as revealed by Equation (1) [20];…”

“…Hereafter, through a procedure of battery charging, stored charge in the battery is represented by Q s , which is the integral of the current level used to charge the battery. Equation (2) describes the procedure in determining the stored charge as in the work of [20];…”

The Evolution Tracking of Tribasic Lead Sulfates Features in Lead-Acid Battery Positive Electrode using Design of Experiments

“…Indeed, the pivot of the research was the negative plate since the barrier was the passivation of negative active material (NAM). 1 The challenge was to increase dynamic charge acceptance (DCA) and partial state of charge functioning at high rates (HRPSoC) [2][3][4] using performance additives based on carbon products. [5][6][7] Regarding the positive electrode, research remains more modest in comparison to the NAM, despite the growing attention in recent years.…”