The Design Of Laser Cutting System For Power Lithium Battery

The Development of battery system is the key for the replacement of fuel-engined vehicle by electric vehicles.It's also the bottleneck when promoting the use of electric vehicles in a large scale.With its unique property of light weight,high capacity,long life and pollution-free,lithium battery has became an ideal clean energy for electric vehicles.The reacher of power lithium battery has been one of the hot points in the industry.Although the manufacture technique for small mobile products is mature,many technical problems arise when it's transplanted into the manufacturing process of big power battery.The equipment for small battery can be used to perform part of the processes needed in the production of power lithium battery,but still many structures must be invented for the cell production. These new structures should be achieved using new equipment and control methods.Laser cutting is one of the most important method of laser machining.lt has the advantages of non-contact machining,high cutting speed,high precision.The thesis introduce the future of the present equpment for lithium battery,and discuss how to combine the laser with embedded technology.In this system,this technology is used in cell production,using laser to cut the electrode or terminal of lithium battery automatically.Based on the requirements Analysis of this laser cutting system,the hardware platform is builded centered in PC 104 and FPGA,and RTAI is used to build a realtime linux operating system. Second,the structure and function of the software is intruduced,including hardware abstraction layer,task management thread,motion control thread,soft-PLC,and graphical user interface.Then the design of circuit and driver is discussed,including each hardware modules such as motor,encoder,laser,and so on.Finally the test results of the laser cutting system are given.Now this system has been used in practical and runs well.