so I’m almost finished my first Esk8 and all ready thinking of my second and what I want to improve upon. first issue that I’m wanting to improve upon is the cable lay out and the battery.
i’m thinking along the lines of a chamfered edge to minimise wasted space and leave a aesthetically pleasing case tapered edge (my current one is a rectangle box that just looks ugly)
odd sized BMS and BMS restrictions (my 80a Alien Power system one just docent fit in neatly around other components (and that are unable to provide a spec sheet for it after weeks of asking its not the standard Best Teck one pictured on there website I thought I would be sent)
keeping the battery with some flex and making the P groups spear and modular. also means I can add more P over time for range or reduce for weight reduction (my first design uses foam double sided tape to space the P packs to allow it to flex joined with silicon cable to the next S so as the deck flexes the pac isn’t under strain.
Low profile (who wants a big pack sticking out the bottom of the long board)
even weight distrabution
after reading throu the forms for weeks I’ve never seen any one use separate BMS in parallel before am I been stupid and this won’t work for some reason iv not thought of yet
my idea pictured below its a 10S 1P then add more packs in parallel to allow board flex
Green 18650 Black is a 16850 spacer 60p of eBay Yello XT 30 will also run cables down hear for other batterpacks Red BMS 10s rated to 10S 20A continues 30A Peak Discharge with heat sensor (can’t fined the dimensions so iv drawn it oversized)
im thinking this modular design would have better protection for each 18650 and if you had a bad sell only part of you battery would shut down letting the other packs take over to get back home at full voltage. higher current draw and higher charge curret and more accurate over heating protection of batteries (no restrictions from BMS/more localised heat sensors) reduced cost.
is there any think iv over looked can you put BMS in parallel like this or is there some big obvious issue I’m missing?