from chemistry to pack
In 2019 the median 10-80% charge time for BEV road cars was 39 minutes. In 2026 that median has fallen to 22 minutes. The fastest quoted pack in our database is 6.5 minutes and that is the 3rd generation of CATL Shenxing pack. Over this timeframe there has been a steady increase in the peak … Read more
Every push toward faster charging runs into the same wall eventually: it isn’t the wire, the electrode particles, or even the reaction kinetics that gives out first. It’s the electrolyte itself struggling to move enough lithium salt to where it’s needed, fast enough. That transport bottleneck has a name: concentration polarization. It’s one of the … Read more
A pack charging time estimator built using the Electric Vehicle packs in the Battery Pack Database. EV Pack Charging Time Calculator EV Pack Charging Time Calculator Estimates DC fast-charge time from pack size, chemistry, peak charging power, and a SoC window, then layers on a simplified thermal model — starting pack temperature, pack mass, and … Read more
The BYD battery self heating system in the Denza Z9 GT means that even in cold conditions it just adds 3 minutes to the charge time. Not quite as the quote is from 20% SOC in -30°C conditions and not the 10% SOC starting point when the battery is warm. In the BYD European patent … Read more
Some papers you read and think, “ok, more of the same.” Others make you question things you thought were already settled. This work by Dr. Dirk Uwe Sauer and his team is definitely in the second category. They took one of the biggest hidden villains in lithium ion batteries, lithium plating, and showed that it … Read more
The Non-Linear Voltammetry (NLV) charging method differs from Constant Current (CC) based charging methods in that no CC is applied at any time. Instead, a series of short Constant Voltage (CV) steps are applied, separated with very short rest periods while monitoring the current response and temperature. A transition from one CV plateau to the … Read more
AION Engineering INC The 1.3 g/Ah Rule: A Starting Point When designing lithium-ion battery cells, a commonly referenced benchmark is the electrolyte mass-to-capacity ratio, typically around 1.3 g/Ah. This serves as a useful starting point for many applications, providing a baseline for ensuring sufficient ion transport within the cell. Why C-Rate Matters However, this ratio … Read more
BYD have stated “Oil and electricity at the same speed”, by this I read: Charging at the Speed of a Petrol Pump. What does that mean in terms of power? A petrol pump delivers 30 to 40 litres/minute energy content of petrol = 9700 Wh/litre 9700 x 40 = 388,000 Wh/minute = 23.28 MWh/hour = … Read more
Charging Current Control Strategy Based on Online Evaluation of the Chargeability Status of its Cells Authors: DIAB Raymonda, SCHAEFFER Emmanuel, AUGER François, POIZOT Philippe, COUSSEAU Jean-François Context Charging time reduction allows : Challenges Standard fast charging methods of Li-ion batteries : Methodology This algorithm enhances the charging current in order to maintain the observed overpotential … Read more
While individual battery cells can charge in under 15 minutes, EV battery packs take much longer to fully charge. There are a number of factors that influence that, including temperature spread across the pack. Key Factors Limiting Battery Cell Lifetime During Charging At the cell level, the fastest rate at which a battery cell can … Read more