Charging Management And Application Design Of Lithium Ion Battery Emergency Lamps In Power Supply Company

This thesis is devoted to solving the management and technical problems in the use of lithium battery lamps and lanterns in power supply enterprises.After investigation,the lithium battery emergency light of power supply enterprises generally has the problems of short service life and high scrap rate.From the management point of view,failure to reasonably dispatch and effectively distribute recycling is the main factor leading to short service life;from a technical point of view,the unreasonable charging method is the main factor leading to short service life and high scrap rate.Therefore,whether from a management or technical perspective,it is necessary to find a reasonable solution to solve these problems that affect the effective use of resources.This thesis takes Qingdao emergency lamp management process and charging mode as an example to analyze,and statistics the number of scrap in recent years,find out the problem of non-standard management-random transfer of users,plug-and-charge when returned,inadequate lamp,or even transfer of non-full lamp,the use of emergency lamp failed to follow the team to form "grouping" or "batch" management.At the same time,the charging method in the past seems reasonable,but only simple charging can be understood as "blind charging".The charging process lacks management and does not have effective management strategies.In summary,on the basis of strengthening the management of daily storage and storage,this thesis focuses on solving the problem of short service life and unbalanced charging of emergency lights caused by unreasonable charging methods.Firstly This thesis analyzes the characteristics of the lithium battery used in the emergency light,and conducts an in-depth analysis of its charging characteristics.From the perspective of eliminating polarization and solving the charging imbalance,the three-stage charging strategy is determined and the appropriate SOC starting value is determined.From the perspective of unbalanced battery packs,the concept of battery packs and battery cells is extended,and the charging management mode of emergency light groups is proposed.Through the parameter setting,the entire group of emergency lights pass a reasonable equalization mode in the initial SOC inconsistency,and finally together When the full charge state is reached,the state of the entire group of emergency lights is kept consistent.Secondly,another key work of this thesis is on practical engineering applications.Through the analysis of theoretical methods and practical application scenarios,external power supply,charging system functions,main control system and various circuit units are designed to achieve.clock synchronization,voltage,Monitoring of electric current,etc.,and focusing on the rational layout of the single cell and battery pack equalization circuit,complete the hardware partt hrough the PCB version;write the corresponding software program,through the control of the main control chip,and finally realize a reasonable charging control strategy.Finally,the thesis designs and manufactures the emergency light charging cabinet as a whole,and corrects the circuits and control strategies through debugging experiments to achieve the original design purpose.