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romvup2021-09-19 23:26:51
Rechargeable batteries
romvup, 2021-09-19 23:26:51

What is the best way to distribute Li-ion cells in a battery pack knowing their resistance?

I have 36 cells for a 12S3P battery.
Resistances from 13.6 to 14.6 mom (measured by passing a change of 1 kHz)

. parallel groups are self-balancing, which means ideally that each of the 12 series groups should be the same resistance. And the group with the most resistance will always discharge faster. I understand correctly?

Of course there is an active BMS, but I want to do everything according to science)

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pfg21, 2021-09-20
@romvup

no difference.
a simple BMS will simply disconnect a charged group from further charge.
inside a parallel group, each bank will pick up as much charge and give it back.
if you really want science, then put a capacitive balancer. then all banks will be in ideally identical conditions.

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