A. Pulse charge/discharge principle The concept of pulse charging is based on successive changes in current rate and/or direction rather than using a constant charging current. Basically, the current can either be interrupted, introducing a shorter rest period, or replaced by a Impact of periodic current pulses on Li-ion battery performance
Firstly, using the C–R pulse mode, it was determined that pulse charging has a positive impact on shortening the charging time for both LFP batteries and NMC batteries, and a smaller frequency is the key to improving battery performance and shortening the total charging time. For the C–R mode, the pulse current amplitude has the greatest impact.
Pulse charging refers to the use of periodically changing current to charge the battery. The pulse current can be positive (i.e. charging) or negative (i.e. discharging). Because the period of pulse charging can be very short, relatively high currents can be used . Pulse charging of a lithium-ion battery has several advantages.
The reason is that a higher pulse discharge current rate results in an increase of cell temperature, leading to better diffusion and thus better charging effect on the battery at low temperatures.
Abstract-- Pulse charging and pulse discharging have been reported by many authors in the literature to improve the performance of various secondary electrochemical cells. Only a few authors mentioned the effects of such charge and discharge method on Lithium-ion batteries.
In addition, other works showed that pulse discharge was detrimental to battery performance mainly due to the fact that the peak currents cause transients on the cell’s voltage that may be interpreted by the voltage cut-off circuit as an end-of-charge/discharge voltage .