Research Of Battery-Management System Based On The Smart Chip

Nowadays, by dint of good performance, Lithium-ion batteries are widely used in portableelectronic devices, such as cellphones, camcorders, notebooks, cordless telephones, power tools,remote control or electric toys, cameras and so forth. It is due to its advantages, like small volume,large capacity, low weight, non-pollution, high voltage, low self-discharge rate and large quantitiesof times of cell-cycling that Lithium-ion batteries take the place of traditional batteries gradually.As a battery, however, safety and security must be taken into account during the charge anddischarge process. In this case, this paper proposes a model of battery-management system (BMS),in which the core device of the battery-management system is MAX11068, while the one used forcontrol is STM32F103, aiming at effective management and control of charge and discharge of cells.In addition, this paper also uses advanced program control technology to make sure that the systemcircuit works properly. In order to observe the remaining electricity, a way of capacity check is putforward based on CPLD, as well as its corresponding codes presented.This paper performs a test on the designed battery-management system, of all12cells, by theway that the average voltage in an interval of one minute, during the change process, is measured,analysing the results that have been obtained. The results reveal that the curve isn’t smooth becauseof the existence of noise that has a certain impact on the performance of the system, but the voltageof each cell goes up with the time in general, from which we can arrive at a conclusion that thedesigned system can work properly on the management of batteries.