from chemistry to pack
Nuvvon pushes True Solid State boundaries … again Author Dr. Simon Madgwick of Nuvvon Inc. Recently Nuvvon shared 1Ah pouch cell specs for Gr-NMC811 and Li-NMC9 plus the related safety test data (nail and ARC). Here is complete cycle data for the Gr-NMC811 cells (it takes a while to get 900 cycles … and counting) and the … Read more
Author Dr. Simon Madgwick of Nuvvon Inc. Nuvvon Solid State Passes Nail Test with Graphite-NMC811 and Lithium-NMC9 Nuvvon has been building solid state cells for years and has long since exposed the things SSB players don’t tell you. There are some 60 so called Solid-State offerings out there but none with a completely dry cell that operates … Read more
A look at the CATL Shenxing Pro battery pack technology. Are CATL going to run out of names as they hype the Shenxing technology and mature the design? The claims are significant [1]: We can dig a bit deeper into each of these. Long Life The long life looks fabulous at the high level for … Read more
The BAK INR4695-330B battery cell is one of the ever increasing number of 46xx format cells. Based on the date on the specification sheet the start of production is 2023. Metrics Specifications Power9 Tech kindly provided us with the images of the cell teardown and their findings from this process. Regarding BAK 4695 battery cell … Read more
Author Dr. Simon Madgwick of Nuvvon Inc. In the post about 10-things (10 things about SSBs that you are often not told) Nuvvon highlighted key issues including safety, pressure, lithium compatibility and scalability. At that time Nuvvon were making small cells around the 100mAh range with modest cycle life & C rate but nonetheless truly solid … Read more
The Tesla 4680 Cell Generation 2 is interesting as this has been in the battery and electric vehicle news so much. We originally looked at the Tesla 4680 cell back in November 2022, since then lots of progress and once again The Limiting Factor have done a teardown. The “roses” that collect the edges of … Read more
CATL BTF0 161Ah LFP is the cell used in the 55kWh Tesla Model 3 SR pack. Sandro Stock et al [1] have published a cell teardown and analysis. This gives an insight to the cell characteristics and design. The cell is made by CATL. Spcifications Jan Schöberl et [4] Metrics It has two jelly rolls, … Read more
A Ragone plot compares energy storage technologies by plotting specific energy (Wh/kg) against specific power (W/kg), with both axes on a log scale. The diagonal lines show discharge time: time = energy / power, so a cell sitting on the 1 minute line would empty itself in about a minute at that power. The plot … Read more
Initial tests of the Molicel P45B 21700 cells. By Stéphane Melançon, Melstronic Conditions: Measured with calibrated precision class 0.01 instruments for rated capacity measurement STANDARD at C/5 …. and more. All measurement including recharge were made using 4 wire (Kelvin) connections for top accuracy. 2 samples were tested: At C/5 At 1C : At 2C : … Read more
Not many details of the CATL 46145 LFP cell as yet. However, it’s worth sharing as we know already that CATL are lined up to supply 46xx cells for the 2025 BMW Gen6 packs. The specifications appear in this CATL document that lists the basic parameters for their UPS Battery Rack System [1]. This post … Read more