One of the things ive been doing lately is diy battery boxes to power my gear (sound systems and lights).
I see there’s a lack of cheap standard dimensioned battery packs. theres only popular proprietary ones. Sony camera/lighting li-ion 2S packs or drill packs, RC lipo packs but not in a hard case. this all end up being quite expensive compared to raw li-ion cells + BMS. With gadgets there seams to also be a problem. handheld computers like prya,zipit,eoma68 laptop[1],gpd pocket,etc use custom lipo cells which are very difficult to get replacements of because there not common but custom sizes.
[1] luke, the eoma68 laptop li-ion cell is a non typical right? i know its a ebike battery cell but i assume theres no typical ebike li-ion cell dimensions?
Why can’t we start cheap standard dimensions battery packs? I guess mass produced of the shelf is needed but what current company is going to start that?
We have standard dimensions lithium cell sizes like the classic 18650 but devices want flat slim lipos :/. For large packs they need to be carefully balanced cells particularly when in parallel. So having mass produced battery boxes that users replace the cells in when the old cells die, i guess is not much good due to the unknowns in how much the cells match each other? Are there other solutions?
Could we have enthusiast packs that are just in series with just 18650s in series for more Wh? upto hmm 6S? and for larger mah switch to more expensive 26650? would this be a in our power solution? would just diy people adapt it? or could products adapt it too?
oww there is AA sized lithium cells too: 14500 maybe they could fit into designs of our little gadgets instead of flat lipo cells?
if we really need small flat lipo cells, what would it take for a set of standard dimensions?
What about large say 5Ah-20Ah sized cells and getting standardized battery packs? for all those large portable speakers or portable solar pods/battery power supply box products and ebikes,etc. Currently some use lead acid retro fit lithium packs but with balancing done internally by the bms, but how acceptingly is that?