Influence Of Negtive Additive On Performance Of Lead-Acid Batteries

In order to reduce carbon emissions,the development of clean,energy-efficient cars is an important direction,and HEVs is considered a necessary stage.With the application of new energy-saving emission reduction technology,the battery has become a bottleneck factor.Because of low cost and safety,lead-acid batteries will serve as the most potential application of hybrid vehicles if negative electrode sulfation and poor charge acceptability at HRPSo C state can effectively be solved.The species and content of the additive of battery plays a decisive influence on the performance of the battery.In this paper,several different additives such as carbon materials,organic expansion agent and nano-sized Ba SO4 were added in negative plate or electrolyte to prepare lead-acid cells,and then we measured these lead-acid cells to get the influence of several additive and content on performance,including charge acceptance,cold-cranking performance,active material utilization and HRPSo C cycling life,etc.Electrochemical tests show that the introduction of carbon would increase the hydrogen evolution potential of cells,meanwhile increase the water los s and selfdischarge(can be controlled within the appropriate adding amount).The effect of nano-barium sulfate on the hydrogen evolution potential and current of the negative plate is less.With the increase of the content of several lignin,hydrogen evo lution potential also increased,in general,the impact is small.Charging acceptance experiments show that different carbon on the battery charging capacity of different impact,nano-barium sulfate and three kinds of lignin are not conducive to the battery charge acceptanceThe low temperature performance tests show that three lignin were favorable for low temperature and large current performance.In addition to graphite SEG,other carbon materials can basically improve the HRPSo C life of the battery.Because of poor charge acceptance,lignin is not conducive to HRPSo C cycle life.Nano-barium sulfate can improve charging capacity,thus effectively extend the HRPSo C cycle life.Carbon black material OCB can also significantly improve the life of 17.5% DOD.In summary,the battery can achieve best battery performance by using carbon black,lignin A and C-type mixed expansion agent and nano-barium sulfate additives.