fatty said:
"Non-solderable foil-tabbed automotive prismatics "
Chalo said:
Versus automotive prismatics? How?
?!?!?!?! What is that? ?!?!?!?!?! "Non-solderable foil-tabbed automotive prismatics "
I know of solder-able pouch cells, with tabs, but I never saw a "Prismatic" with "tabs".. I have seen them with studs, and or pads, for laser welding.. but not any with a sort of tab.
A pouch cell has tabs, but a pouch cell is not prismatic. A pouch cell is a pouch cell and has layers, not a jelly roll inside ( like the Ford C-Max prismatic, the Volt pouch, very different, one has solder-able tabs and one uses bolts.. ) ( neither have " non solder-able tabs" and the " foil tab" (pouch) is NOT prismatic. )
How many ebike pack housings are crash-rated?
-Packs of cylindrical cells necessarily include voids, and cell holders increase void space further.
Both cylindrical and prismatics can fail, but cylindricals are mechanically more robust and cylindrical packs are less likely to cascade into full-pack failure.
I would like to see actual tabulated stats on this. Claim.
Trust me, any highway going lipo or lithium cell goes through MUCH more stringent safety standard testing than ANY ebike cell. Ever. Period. In the factor of billions of dollars more R&D, certifications, than any ebike manufacturer gets the certifications for. Every highwa...
Highway going pouch cell systems are bolted too, not only laser or ultrasonically welded. I have seen bolts, laser and ultrasound,.
Prismatic is 100% fill efficiency.
Cylindrical is only 91% fill efficiency.
Both cylindrical and prismatics can fail, but cylindricals are mechanically more robust and cylindrical packs are less likely to cascade into full-pack failure.
I would love to see actual referenced data as to this ( fail rate you refer). There is only one manufacturer who uses the cylindrical cell in OEM highway going vehicles. There s a reason for that.
I know of highway going certified NHTSA cells that are much safer than any ebike cell.... ( much more expensive too.. ) No fire, No conflagrations, can be punctured, and are listed in the datasheets as " NOn Flamable". More power density, safer. That is why they use them in vehicles for roadgoing use. Oh hell yea they tested teh hell out of highway cars, but not the ebike junk.
Ebike fires are much more common than ... Ford or Chevy or Tesla fires. IDk. I just dont want people to confuse pouch cells ( with tabs) and prismatic cells ( with ... jelly rolls) .