Through the matching calculation of energy storage device and power system for for EREV (extended range electric vehicle) and CFV (clean fuel vechile), we can realize the reasonable matching of the power and economy of the whole vehicle. By optimizing the control strategy of BMS (battery management system), the battery efficiency can be improved, and the motor can output its optimal performance; by optimizing the design of the sealing and temperature control of the battery pack, the performance and service life of the battery can be improved thus enhancing the safety of the whole vehicle. Develop and promote the battery swap system to solve the long charging conundrum of electric vehicles. IAT is also able to conduct PACK integration development, performance optimization matching, PACK thermal simulation and management, BMS integration development and PACK test verification.