Through the comparative analysis of cell base materials, various cell integration technologies, and lightweight battery housing solutions, the technical paths for battery density enhancement are elaborated. The improvement in energy density of individual battery cells heavily relies on significant breakthroughs in basic material science. In the post-lithium-ion era, cell densities are expected to reach 1200 W·h/kg, while in the short term, semi-solid battery technology with a cell density of 360 W·h/kg is anticipated to be the first to achieve mass production, enabling electric vehicles with longer driving ranges and higher energy efficiency. Another key technology is to improve cell integration efficiency. Innovative solutions such as Cell-to-Pack (CTP), Cell-to-Chassis (CTC), and Cell-to-Body (CTB) are anticipated to increase cell integration rates to 90% and space utilization to 70%, breaking traditional design limitations and significantly enhancing battery pack energy density. The lightweight design of battery housings is also essential. Lightweight housing design like aluminum alloy extruded profiles, aluminum alloy integrated die-casting, ultra-high-strength steel rolling, and carbon fiber composite materials molding can effectively reduce the overall weight of battery while ensuring performance, thus improving energy density.

Energy density  /  Battery  /  Lightweight  /  Battery-powered electric vehicles  /  Cell integrated technology