V-shaped bay, V-shaped battery

72V tells you the voltage, not whether the pack fits. This bay narrows towards the bottom, so the cell groups follow that V from drawing to case.

IN SHORT

“72V” says voltage, not fit.
This bay narrows towards the bottom, so the cell groups interlock to use its shape.
Copper, wrap and case follow the V through to the finished pack.

A CHAT WE SEE A LOT

Rider

bro found one 72v universal battery online

can put inside my v bay or not sia

universal until u open the battery door

then suddenly universal become very specific liao

but voltage same leh

voltage same, shape different lor

your bay is v-shaped

square battery anyhow shove, then everyone stare at the door stuck

so squeeze in can already ah

eh dont squeeze battery to make it fit lah

battery not kaya toast, press press then can one

send the bay measurements or come down

we draw it to your v shape first, then the pack can fit like it got sense

Bay narrow at the bottom, so how?

Wah lau this bay ah, wide at the top then narrows at the bottom, like a V with the point cut off. A normal rectangle can leave dead space down the sides or simply not go in.

Confirm plus chop cannot solve wrong shape with the same voltage. We model the bay before drawing the pack.

Straight rows? Go holiday

Aiyo bro, straight rows here can go holiday already. In DogeTune Builder, the 20 series groups interlock down the V, each shaped to use the space beside the next.

Steady lah, two 10S12P modules make one 20S12P, that is 240 cells altogether. We place every cell and check the layout until Builder says “Pack valid”.

20S12P · 240 / 240 CELLS PLACED · PACK VALID · 304 × 236 MM FOOTPRINT

Holder also need follow instructions

Wah lau, holder must follow the same V or the cells stand there like nobody brief them. That one awkward until the whole workshop also quiet.

Confirm follow the drawing, we place the cells row by row and check them as they go in. The holder follows the layout shape.

Copper cannot anyhow anyhow

Aiyo, interlocking groups mean the copper must follow along too. A big rectangular busbar can cover the wrong shape.

Don’t play play, each busbar is cut to the outline of its group, then spot welded on row by row. The drawn group shape decides where the copper goes.

FR-4 on, BMS up top

Steady lah, modules get wrapped in FR-4 sheet and the BMS sits on top. Whole thing still follows the V shape.

Confirm plus chop, the BMS leads can reach every series group from there. That is how the wiring is arranged before the pack goes into its case.

THE FINISHED PACK

V in, V out, siap

Wah lau, finally the finished pack follows the bay’s V profile. It slides in without pressing, and the shape uses the space down the sides instead of leaving dead space there.