The Design Of Lithium Battery Management System For Vehicle

This paper describes the design for Li ion battery management system, from thelithium battery itself characteristic of change of current, voltage, charge and dischargeprocess of lithium battery of lithium battery group, changes in temperature, throughthe design of hardware circuit of strict monitoring and control it, and by the computerprogram written in a timely manner displayed on the computer, thus the reasonableprotection lithium battery, prolong the service life of the lithium battery group.Lithium battery management system in this paper, which includes the hardwarepart and software. The hardware circuit part uses the company of meaning lawsemiconductor production of high performance chip STM32F107VCT6as the maincontrol unit. The hardware monitoring circuit and the voltage balancing circuitdesigned by ourselves, which control and monitoring the lithium battery voltage,current, temperature, as well as30lithium battery monomer voltage, while thelithium battery work in the calibration condition. The host computer software programusing Visual Studio2010WinForm platform, the use of C#language program,achieve real-time status reflect the lithium battery group, concise monomer in theman-machine interface. The upper computer software and hardware circuit of themain control unit using CAN communication and TCP/IP communication mode ofcombining, for real-time state of lithium battery group, monomer are transmitted tothe host computer for display, lithium batteries, monomer temperature, current,voltage appears abnormal timely display in the human-computer interface, promptingvoltage, operating personnel the lithium battery current, temperature change,treatment of lithium battery problems quickly and effectively. And will monitor thedata storage, analysis of lithium batteries in order to change the state of.According to the actual power battery capacity demand, increase and decrease thenumber of lithium batteries, lithium battery power management system can be usedfor power battery hybrid vehicles, pure electric cars, but also can be extended to control the application of other large power battery, according to the power batteryrequired for electric requirements of the automobile, the validation of the powermanagement system stability and accuracy. Power management control schemedesign, can be used in pure electric vehicles can also be applied to hybrid vehicles, thelithium battery management system can be flexibly applied to different groups ofpower battery.