DaveinOlyWA wrote: ↑
Tue Dec 10, 2019 6:35 am
So the Fenix plan doesn't work for you but it is still a good solution
Qualifying that you are only talking about a good Financial
solution--but what about Technical
i would suggest that it is not trivial to build, manage and control a multitude of small cylindrical cells in parallel. There are numerous accounts on other forums of garage and home fires by diy electric vehicle guys trying to build their own packs like this. Tesla may be the only OEM doing this, and they use plenty of countermeasures in hardware (individual cell fuses) and electronics, including 24/7 active cell monitoring in order to provide a safe solution.
It seems that most other OEMs are using series strings of large capacity prismatic cells.
Nissan is the odd-ball here in that they are using series strings of 2 pouch cells in parallel but with no individual cell fuses. It may be that a weaker chemistry and the metal module cannisters were chosen to compensate for this lack of a safety feature.
What is the level of knowledge, skills, abilities and experience of Fenix Power with respect to the design, management and control of packs built up of small cylindrical cells in parallel?
Who is going to design and build the circuit boards necessary for monitoring the cells and control of the pack?
And how is this new pack going to be integrated with the current operating system of the Leaf?