Data acquisition unit and sampling method thereof for electric vehicle

The invention provides a data acquisition unit and a sampling method of the data acquisition unit for an electric vehicle. The data acquisition unit comprises a microprocessor, a CAN interface circuit, a data storage device, an SD card storage device, a real-time clock circuit and a data transmission interface. According to the data acquisition unit and the sampling method of the data acquisition unit for the electric vehicle, on the basis of on-site data collecting, operation information of the whole vehicle is filtered and received through a whole vehicle CAN bus network, information which is the focus of the study personnel is collected in real time with high speed and is recorded in the internal SD card storage device and the SD card storage device has the advantages of being large in capacity, fast in reading and writing and the like. Thus, massive operation information can be recorded for a long time. Sufficient and objective data analysis bases can be favorably provided for the study personnel to formu