| The development of vehicles will pay much attention in energy consumption and friendly environmental issues. Technologies related to electrical vehicles (EVs) have been remarkably developing to meet the needs for society and high performances, but it still needs a further work in this area. Battery Management System (BMS) is one of the key components in EV or HEV. BMS plays important roles in the efficiency and safety of rechargeable batteries, as well as the driving distance and performances of EVs and HEVs. Therefore, this study aims at the development of BMS with higher efficiency and more practical.In this paper, based on the data obtained from charge/discharge experiments and on-site data from a running EV, the Ni-MH battery's work principle and charge/discharge characteristic were analyzed in-depth. The paper proposed a novel SOC prediction method according to the uncertainties in battery systems. In the newly developed SOC prediction method, amper/hours method was integrated with RBF neural network, and its accuracy and practibility were validated via Matlab and Advisor simulation.Based on the state-of-art 32-bits DSP controller TMS320C2812, a battery management system was designed and studied. That was a distributed structure system, in which CAN bus was used to achieve the communication between DSP controller and battery modules. The designed software and hardware were presented and debugged in the CCS environment.A USB-based communication and data storage interface was designed for the BMS. This interface was developed based on many protocols and specifications, such as USB1.1 specification, Universal Serial Bus Mass Storage Class Specification, SCSI Commands, FAT file system and so on. With the developed software and hardware, the data of the imformation in a battery management system could writen into U-disk directly. This interface greatly improved the develop efficiency of BMS.The study will be useful for further developing an efficient battery management system both theoriticaly and in practice. |
