Abstract:This paper uses fan forced convection heat transfer to study on thermal management structure design and performance of 120 6 AH nickel-metal hydride batteries. during nickel-hydrogen batteries management system’s structural design, it makes a rational、 scientific use of the limited space, and utilizes fluent software to Numerically simulate the thermal management structure design, according to numerical analysis of the structure , it makes improvements to the system and produces entity sample. Sample test results show that the thermal management system meets the expected demand.