Traction battery, as a key component, plays an important role in the mass application of electric vehicles. In the field of its R&D, US, Japan, Germany, Korea and China have all formulated their national-level plans for traction batteries respectively. In the field of traction battery industrialization, lithium-ion battery is the mainstream product, and China, Japan and Korea are the three major suppliers and competitors. Their products involve different material chemistries, capacities and manufacturing processes, the energy density ranges from 89 to 245 (W·h)/kg, and mass production is realized. The category of material chemistry and related technical parameters have also been proposed for the future traction battery industrialization. Issues faced by manufacturing equipment, material chemistry, system integration and evaluation for the traction battery are pointed out at the end of this overview.

electric vehicle  /  lithium-ion traction battery  /  industrial development