from chemistry to pack
Author Dr. Simon Madgwick of Nuvvon Inc. Last post Nuvvon showed their solid state 5Ah SiC NMC cell cycling continuously at 3C/5C for 1000 cycles full DoD to 90% SoC. Next up is the cell demonstrating incredible sub-zero temperature performance. Here we see discharging at C/5 down to -50° C delivering over 50% capacity. Such cold temperature performance is … Read more
AION Engineering INC No matter how optimized your internal cell structure, electrode design, or N/P ratio might be, the ultimate bottleneck in freezing temperatures is the electrolyte. Just as a flawless, 1,000-horsepower engine is utterly useless if the diesel in its fuel tank has frozen, a lithium-ion battery faces the exact same fate. The electrolyte … 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
Most lithium-ion cells are rated to operate from –40 to 80 °C, yet few ever experience the extremes for more than a few minutes. In real-world operation, temperature tends to converge within a much narrower band. This is typically between 30 and 50 °C. That reality should guide how battery models are trained if they are to … Read more
What are the Cold Temperature Charge / Discharge limitations and mechanisms? At cold temperatures lithium ion cells suffer from a significant decrease in available capacity. The DCIR of the cell increases significantly as the temperature decreases. Significantly reducing the available peak and continuous power. This post has been built based on the support and sponsorship … Read more
Cold climate EV range is determined by a number of factors. First of all though, let’s look at the range results as conducted by Motor.no in their winter range tests. An impressive test with 29 different electric vehicles. Read the full description of the tests on the Motor page and there you can see some … Read more