the original picture is not very clear, but i can not see 2 connections (minus) to the pack, 1 coming from B- on the PCB and 1 from the balance lead (black wire)
same goes for the positive side (from B+ on pcb) and 1 from 4th balance lead.
I would also try to put the balanceleads on the...
thatdatasheet is more the safety sheet, not the actual technical datasheet, with currents and chargerates. I found that, but not much more.
some references found (russian) say it's manufacured by Sony.
same site stated the 1C and 3C rating.
max charging at 2a
not fuse?: living on the edge? :-)
I think I'm going to fuse, just to be on the save side, until I gain a bit more experience.
Ok, I will start googling for 15A fuses or something in that rating.
it's not a 18650, it a GP4105054T1000L, prismatic, but difficult to find spec. there is a post somewhere on the forum.
I'm still collecting 18650, slowly getting there.
my collection of 18650 is mainly from e-bike batterypacks. sometimes difficult to collect them, but mostly the bms is dead...
thanks for the reply:
for my setup: 1C = 10A, which would be the max continuous estimated current draw per cell.
so I may need a fuse of something like 20A per cell, maybe a bit higher.
you suggest main fuse to be 1/3 of cell fuse. so maybe cell fuse at 30A- 40A and string at 15A?
what is the general value of cell level fuses to use?
for typical 14S60P or more, I see glassfuses of about 2 amp, 3 amp.
This would be about 3 to 6 times the expected currentdraw, if I'm not too far off. (calculated at 500mA or 1000mA draw per cell)
if I have cells that...
In Belgium, you can find advertisementon E-bike battery service, these services repair/upgrade/recondition e-bike batteries.
You bring in a faulty/worn out e-bike battery and they replace the cells with thepossibility to 'upgrade' the overall capacity.
I can imagine, that those serviced...
sorry, you are right, had arough day at the office, mixed it up.
of course: I meant 500mA standard cellphone charger, giving about 70mA per cell. the device i mentionned does not seem to care about 0V. (not in 0V like popped CID, more like below 1v)
if you see something like 20% charged, you...
testing can be done with any tester like opus or liitokala, you will just have to connect the terminals with some wire or crocodile clips.
watch out, they are a bit strange regarding their terminals: the casing is Positive, the small terminal is negative. you can see the difference on the...