Research And Design Of Embedded Control Platform For The Lithium Battery Device

Nowadays, lithium battery is widely used in all kinds of portable appliances, such as laptop computer, cameras, and mobile communications with its unique property including light weight, large capacity, high voltage, long life and pollution-free. There are several procedures in yielding lithium battery. But in this paper, two of the most important procedures will be discussed. One is Post-inspection of electrode welding; the other is winding of electrodes. Aiming to these two items, a self-designed lithium battery embedded control system was put forward together with a total solution for the software and hardware platform.Firstly, based on the analysis of the requirement of control system for lithium battery winding equipment, such as exact control of motor, joint control of multi-motors, collection and feedback of external I / O signals, a hardware design scheme was put forward. The design adopted the AT91SAM9263 chip with the core of ARM926EJ-S ^TM ARM^? Thumb, and FPGA /PLC developing board instead of IPCs (industry personal computer) and DSPs (digital signal processing).Secondly, a DSP-based automated visual inspection system was designed with the detailed analysis of the post-inspection system of electrode welding machine. The hardware system took TMS320DM642 as a core and had four video inputs, one output compatible with composite video, VGA and S-VIDEO.Thirdly, the excellent embedded real-time operating system was introduced after studying the software system based on AT91SAM9263 chip --RTAI (Real-Time Application Interface) and Linux Hybrid OS. The detailed introduction of RTAI, the key features of RTAI such as ADEOS / ipipe, the configure and compile method in PC system was presented in the paper. The advantages of the RTAI and Linux OS also summarized.Finally, Qt was selected as the GUI design tool for its platform-independent. The paper also introduced the build step of Qt platform under Linux, communication method between Qt and the real-time tasks and the simple frame design of the interface.Obviously advantaged, the whole system can provide both functions of control and visual inspection, while with consumption and cost reduced compared with other platforms, e.g. IPC. The Preliminary evaluation of the overall scheme including hardware design and software analysis and testing has been done, great technical improvement of the embedded control system for lithium battery production once successful developed will be brought.