It requires much more sophisticated charger hardware, which reflects its cost, and the practical benefits are questionable. In summary, pulse charging is technically challenging. Most of the benefits are disputable and have not been generally accepted by the scientific community. With the same average current, it causes higher joule losses and battery temperature. Application of this technique with the same maximal charge rate results in longer charge duration. Some reports claim dislodging gas bubbles from the porous electrodes active mass. It is supposed to lower electrode polarization during charging and reduce gassing. The pulse charging with a short reverse polarization pulse prior to each charging pulse is called ‘negative pulse charging’. Installation of durable and reliable reference electrode would increase the battery cost significantly. For better control of pulse charging, individual electrodes’ potential control would be desirable however, this is technically challenging. ![]() Pulse charging has no influence on diffusion however, it leads to lower gassing and higher negative electrode polarization at the end of charging. On the contrary, in comparison with equivalent average CC, pulse current generates higher joule losses and longer charging time at the same maximal current rate. Thus, such pulse charging might reduce gassing. ![]() Once it reaches gassing voltage, the pulse current is interrupted. Battery voltage during the pulse is monitored. During a pulse switch on current, voltage increases, reflecting the same voltage fractions as at the current interruption with nearly the same time constants. Other benefits of pulse charging were claimed some are supported by experimental measurements, some are rather vague and disputable. Svoboda, in Encyclopedia of Electrochemical Power Sources, 2009 Pulse chargingĪs mentioned earlier, pulse charging is convenient for IR free charging.
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