A data
supporting system of a fuel
cell city
bus, is acceptable for collection and analysis of
mass data, belonging to the technical field of fuel
cell car, comprising a SCM including a TPU module, a CAN network, a level conversion
chip, an SD card, a real-time
clock; CAN interface of the SCM including a TPU module is connected with CAN network; TPUA port of the SCM including the TPU module is connected with a real-time
clock; TPUB port the SCM including the TPU module is connected with a level conversion
chip, which is connected with the SD card. The SCM is the one of MC 68HC series, MC68K series and MPC5xx series made by Freescale company. According to the invention, main control task is not affected, also extra
control unit and
data transmission are not designed, wherein quantity of
record data is large, recording time is long, and the stored data are not covered before deriving the data, and compatibility is strong.