WANG Mingyu, ZHANG Conghui, XU Song, ZHAO Liangdong, LI Liangsheng
The cylindrical F zinc-nickel battery (ZNB) with special current collecting structure was designed and developed. The application of ZNB in hybrid electric vehicle was systematically evaluated from different levels including cell, module and battery pack according to the requirements of hybrid electric vehicle battery. The capacity of the F cell is 10-13 Ah, and the energy density reaches 120 Wh/kg. The end face current collecting structure of cathode enables the battery to possess excellent rate charge/discharge performance, 80% capacity can be charged in 30 minutes, 94% rate capacity can be delivered at 10 C discharge rare, meanwhile it also shows excellent startability at –29 ℃. The specially designed outer conductive film prevents the zinc electrode from contacting the steel shell directly, inhibits the side reaction, and improves battery cycling stability. 1 200 cycles are achieved at 1 C with 70% capacity retention, and more than 200 000 times start-stop life are obtained for start cycle. No fire or explosion happens after over charge, over discharge, short circuit and needling test. This investigation provides important reference for the large-scale application of ZNB in hybrid electric vehicles.
