Original EV Charging Research & Telemetry Datasets

Modern DC fast charging stations deployed across public networks predominantly utilize liquid-cooled CCS1 and CCS2 charging cables rated to a physical limit of 500 Amperes. Under a 400V nominal pack voltage, this 500A ceiling caps power delivery at roughly 175–200 kW, forcing automotive manufacturers to push cells to high relative C-rates early in the charging cycle. This empirical investigation evaluates CAN-bus telemetry from 800V-class vehicles (Hyundai E-GMP, Porsche J1, Lucid, GM Ultium) against 400V benchmarks (Tesla Model 3/Y, Ford Mach-E, Rivian R1T). Telemetry reveals that 800V systems reduce resistive pack heating (I²R) by up to 73% during peak acceptance, allowing sustained high-power plateaus past 55% SoC and yielding an average 10–80% dwell time reduction of 44.8%.

Automotive marketing routinely advertises peak charging power (e.g. "Up to 250 kW DC Fast Charging") as a singular proxy for charging performance. However, because battery management systems (BMS) enforce continuous thermal and electrochemical power throttling as state of charge rises, advertised peak power is often sustained for less than 180 seconds. This empirical study analyzes true 10–80% integrated average power (P_avg), Peak-to-Average Ratio (PAR), and effective charging C-rate across 25 electric vehicles. Findings indicate that vehicles with modest peak ratings (e.g. Audi e-tron GT at 270 kW peak, 195.2 kW average) frequently outcharge vehicles with equivalent or higher peak ratings whose curves exhibit steep linear degradation.

Sub-zero ambient temperatures dramatically impede lithium-ion diffusion kinetics, elevating battery internal resistance and increasing the risk of metallic lithium plating on graphite anodes during high-rate charging. In response, Battery Management Systems (BMS) enforce severe "cold-gate" throttling until the pack reaches an acceptable electrochemical temperature (>20°C). This study evaluates empirical DC fast-charging sessions conducted between -10°C and +25°C with and without active navigation preconditioning across 10 modern EVs. The data demonstrates that active thermal preconditioning consumes between 3.2 kWh and 6.8 kWh of energy while driving to the charger, but reduces DCFC dwell time by up to 26 minutes and increases net road-trip average velocity by 18.4%.

Electric vehicle usability on extended highway corridors is determined not by nominal battery capacity or EPA range alone, but by "Effective Highway Travel Velocity" — the mathematical ratio of miles driven to combined driving and charging time. A vehicle with a large battery pack and slow charging curve often spends significantly more time stationary at charging stations than an efficient vehicle with a moderate battery pack and rapid charging capability. This research benchmarks 25 production EVs across standard 15-minute and 30-minute charging stops, calculating empirical Miles-Per-Minute-Charged (MPMC) and overall 600-mile highway corridor transit times.