Abstract:

 This paper analyzed the key parameters for passenger battery electric vehicles (BEVs) to evaluate the technical level for different vehicle types, to determine the key technical parameters for new design vehicle type, and to make related policies. The data came from the 275 kinds of vehicle model from 9 batches of the catalogue of new energy vehicles (NEVs) from 2014 to 2016 with purchase-tax-exemption released by government. Analyzed the average, the maximum and the minimal value, as well as the quantity distribution with different curb mass (m) for passenger BEVs. As results, the energy consumption per 100 km is ranged at 7.60~34.84 kWh, the energy density of traction battery is 50.53~199.4 Wh/kg, the ratio (λ) is 9.95%~31.65% between traction battery gross mass and vehicle curb mass, and the consumption per mass-mileage-energy is 78.05~225.90 Wh·(km·t)-1; the ratio λ with an average value of 21.43% is much higher than the ratio between engine-mass and curb-mass for traditional-vehicles; the energy economy performances for BEVs within the mass segments of m ≤ 1 t are much higher than the value desired by Chinese government; it might make an opposite conclusion when evaluating BEVs energy consumption by using energy consumption per 100 km and by using mass-mileage-energy consumption. Therefore, it is recommend to adopt mass-based grouping limit or fitted straight-line method when regulate BEVs energy consumption.

Key words:  battery electric passenger vehicle, new energy vehicles (NEVs), purchase tax exemption, energy consumption limit, energy density of traction battery pack, mass-mileage-energy consumption