Application Of Intelligent Charging Technology In Lead-acid Battery For Electric Bicycle

Bicycle lead-acid battery powered electric bike,you need to have a high rate discharge performance and deep cycling.Current industry standard warranty period for electric bike lead-acid batteries is 8 + 7 of fifteen months,eight months of which is renewal of the current lead-acid battery bicycle renewal of the return rate is generally about 5%.Through the quality return of battery analysis,we found that the quality of the first two rows in the return is the lack of capacity and battery bulging deformation.So reducing the low capacity battery and bulging battery for enterprises to enhance their profitability is very important.Firstly,we focuses on the method for charging the battery and charger study to address market return,to reduce the bulging battery and charging battery caused by insufficient capacity.For the major problem of insufficient capacity is to improve the cycle life of the battery from the charging method,we have studied Battery water loss,grid corrosion,a negative relationship between s ulfide battery life.Lead-acid batteries usually found the cycle life is best when these regimes maintain the SOC of the battery in a range between 97% and 100% to avoid excessive overcharge.and intermittent the SOC of the battery in a range between 102% and 105% excessive overcharge.That is when using normal charging 1.8A constant,charge to 2.45 V / single cell,then 1.8A,2.45 V / single cell charging 30 S,30S intermittent charging.when current to 0.6A,The mode is transferred to the float current float voltage 2.3V,3 hours after stop charging.According to the number of battery environment(20)float regime will paused,start new charge regime,that the charge current 0.6A,voltage 2.6V,timing of charge for 1 hour.Secondly,we studied the thermal distribution of the single cell and 48V12 AH assembly models,it founded that the process of charging the battery pack temperature and the installation distance between the electrodes is inversely proportional relationship,and spacing of the assembly will cause the single battery temperature up to 5℃.When the battery is greater than the pitch of 4mm battery temperature to ensure consistency.By studying the temperature on battery performance,we found that the use of wireless transmission technology for the surface temperature of the battery real-time collection,can be good for battery temperature management,when the temperature is higher than 30 ℃ temperature compensation system start,the battery can be reduced gas analysis volume.While adding 60℃high temperature protection mechanism,when the external battery temperature rises to 61 ℃,the charger automatically stops charging,it can effectively prevent deformation of the battery failure.Finally,the charging method and wireless transmission technology implemented on the charger,through laboratory 100% DOD cycle life than and deformation return on the market the most factory test tracking,it can improve battery cycle life by 20%.