Calculation Analysis of Lead-acid Battery Temperature of Urban Electric Vehicle

Lead-acid battery is one of the common energy applying devices of electric vehicle(EV).Suitable working temperature range is an important factor for obtaining optimum performance and prolonging life of batteries.To the need of battery thermal management system,the calculation model of battery temperature variation was proposed resulting from its heat generation and dissipation.Given working environments,and loaded with urban driving cycle for EV,battery temperature varying processes were calculated and analyzed under different initial conditions.The results showed that battery temperature might not always keep in the suitable working range without heating or cooling,and corresponding thermal management system was necessary for batteries to be normally used.