building battery help wanted

mike513

Just Joined
Jun 30, 2020
1
0
help wanted im building several 10s 36v batteries for my ebike using 80% capacity sanyo batteries from the netherlands and vruzend kit i have 2 questions 1 the batteries vary from 1.80 to 2.1 ah can i put them in any order on the parallel run and 2 watching videos from micah at ebike school.com he mentioned putting two bms on a battery for redundancy but didnt explain how - would i wire them both in identically and if one died would the other seamlessly take over and how would i know one had died and which one had died ?? any advice gratefully received. mike
 

vfr400

Esteemed Pedelecer
Jun 12, 2011
3,965
1,334
Basildon
80% batteries will be useless on an ebike, especially 1.8 and 2,0 Ah ones. If you're going to build a battery, use decent cells and do it properly, otherwise buy a cheap battery from Ebay.
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
10,720
4,059
57
West Sx RH
2ah cells at 80% will be **** poor, you will be lucky to get 1.3/1.4ah capacity out of them let alone use 1.8ah cells.
 

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