ABSTRACT There is significant interest in using Li-ion batteries as the power source for electric vehicle (EV) applications. Li-ion batteries are, however, sensitive to their thermal environment and it is important to control their operating temperature in order to meet the safety, reliability, and performance requirements. Computer aided engineering (CAE) is used extensively in the automotive industry to assist in the design and development of vehicles. This paper describes an analytical approach that Tata Motors European Technical Centre (TMETC) has developed using existing tools and new techniques in order to support the design of a battery thermal management system.