from chemistry to pack
Grid storage cells have grown quickly. The 280Ah and 314Ah LFP prismatic cells that defined the early 2020s are being displaced by 500Ah-plus formats, with 587Ah, 628Ah and 684Ah in production or launch, and claims above 1000Ah announced [1]. The interesting engineering question is where the benefit actually lands. Most of it shows up at … Read more
Lithium manganese-rich (LMR) cathodes are back in the conversation because a major automaker has put dates on them. General Motors and LG Energy Solution have said they will build prismatic LMR cells at Ultium Cells, with pre-production at an LG facility by late 2027 and commercial production in the US in 2028 [1]. This post … Read more
How much energy will a cell hold in 2030, or in 2035? (If you need a refresher on the two measures, see cell energy density.) Most answers to that question start from a target or a press release. This one starts from the cells themselves. We took every cell in our cell database that has … Read more
CATL and Quibo’s Mobile Power Plant Ultra 2.0 packs up to 2,036 kWh, a converter, EV chargers and a solar inverter into a 20-foot container. What the IAA 2026 placard discloses, what it leaves out, and how it compares.
The Battery Data Behind IAA Transportation 2026 IAA Transportation 2026 ran in Hannover from 15 to 20 September, and electrification was the theme running through most of the exhibitor announcements: Volvo, DAF, MAN, Scania and SANY all had electric truck news on the stand. The one battery-specific launch worth digging into in detail is CATL’s … Read more
Author Dr. Simon Madgwick of Nuvvon Inc. Nuvvon recently showed their solid state 5Ah SiC NMC cell cycling continuously at 3C/5C for 1000 cycles full DOD to 90% SOC. Then incredible sub-zero temperature performance discharging down to -50°C with over 50% capacity and charging at -40°C. Here is the final post on these 5Ah Silicon cells – comparing … Read more
“What are the benefits of a Magnesium battery pack enclosure?” arrived in my inbox with a link to the Estes Energy website. That got me looking at this particular design as a benchmark and also more generally about the use of magnesium as a structural material within the pack design. This post has been built … Read more
CATL’s automotive-grade NMC811 prismatic cell ships with a headline safety feature: a “Dual Vent Safety Design.” The specifications: We believe this cell is for ACC. Jerry Wan shared details of this CATL cell on LinkedIn and it got us thinking: Why vent design matters more on NMC811 A cell’s vent only has one job: get … Read more
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
An update on the Rivian R2 battery pack, now we have more information and more hard data. Trouble is the 2024 Investor Day R2 data left out a lot of the detail and the CEO updates in 2025 (Rivian R2 Pack – 2025 Update) were a little bit confusing. Time to again see if we … Read more