Composite current collectors with metal on both sides of PET film are lighter and fare better under nail penetration, but are harder to weld. Read via CATL’s US11539050B2 and US11233244B2.
Blade cells span the pack width and take over the role of beams. What is gained in pack space rather than cell density, and BYD’s patent claiming cell length as ratios.
CNTs can clear the out-of-plane conductivity baseline at under 1 wt%, but lose their edge if shortened in dispersion. Read with LG Chem’s US10686185B2.
Too little electrolyte is a problem, and so is too much. Why the yardstick is shifting from fill amount to electrode pore volume, and a patent that claims it in numbers.
Why anodes use water-soluble CMC/SBR while cathodes use PVDF in NMP, read through the pH threshold and Nippon Paper’s CMC patent (US9240583B2).
Anode overhang insures against edge lithium plating but leaves a reversible capacity shift. We read its conditions through Medtronic’s no-overhang patent US8105714B2.
A redox shuttle circulates current arriving after full charge and pins the voltage. We cover its match with LFP, the solubility challenge, and the boundaries of the 3M and Argonne patents.
With or without a center pin, the same 18650 degrades differently in cold cycling. We map the three roles of the core and Samsung SDI’s double center pin patent US9219263B2.
Phosphorus flame retardants make electrolytes burn less but weaken the anode film. We compare small-dose, solvent-swap, and structural routes, and read the cyclophosphazene patent US6455200B1.
Pouch film’s weakness lies in the polymer boundaries around the aluminum. We map each layer, seal degradation, and DNP’s insulating-layer hardness patent US10777785B2.