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STUDY OF BATTERY CHARGING AND DISCHARGING CHARACTERISTICS OF DIFFERENT BATTERIES ON DIFFERENT LOADS

¹MEHER KUMAR

¹ Engineering College , Dayalbagh Educational Institute, Dayalbagh , Agra282005

E-MAIL: meherkumarusic@gmail.com

ABSTRACT                                        

Earlier Lead Acid batteries were available and used widely since Lithium Ion batteries were not discovered .The Lead Acid are still used since they have low cost of initial investment and have low specific energy and are capable of high discharge rates . When Lithium Ion batteries came into practice , they were found to be having light weight , able to provide constant power ,are temperature tolerant and charging is fast and safe .Though Lead Acid battery are cheap in initial investment but lithium Ion battery although costly requires less investment and service . Since nowdays both batteries intermixed charging is used . The mobile charging is done in car itself. The car charged from lead acid or lithium ion depends upon type of battery used . Whereas mobile has lithium ion battery . So when mobile charging is  done in car , there is intermixing of two batteries. And so a study forcasing the characteristics nature in regards to charging and discharging regimes i.e state of charge and current naturehood during these period is envitable . So now we are charging Lithium Ion battery with Lead Acid or Lithium Ion or vice –versa .So due to this at times , we observe that there is too much delay in charging . So it becomes evident  to check the Charging and Discharging characteristics of both Lead Acid and Lithium Ion batteries separately and also through their series-parallel combinations to discover the malfunctioning in it in order to raise the points so that further more work could be done in this respect . By studying the nature both through the display and waveforms , we are able to demonstrate the peculiarities and able to derive the basic inbuilt in their charging and discharging patterns . Thus we are getting much better throughput in understanding .

“Batteries with good characteristics will help the user to operate their devices safely .A good battery has to be dependable and reliable on load varying working conditions .A rectified Battery management system not only possess good  energy density but it also not affected by the temperature variations developed in working environment .So an attempt is made to survey the SOC and current characteristics to understand their limitations .