JK BMS mis-numbering?

Lyn1489 · Apr 25, 2024

Hi All.
First post here.
Anyone have any idea why the new JK BMS (JK-PB2A16S-20P) has 2 B8 connections printed on the plate above the balance terminals?
Do I miss out the second B8 completely or consider the second B8 as B9 and go on from there.
Just a first observation of the BMS so I might be missing something simple.

BentleyJ · Apr 25, 2024

Lyn1489 said:
Hi All.
First post here.
Anyone have any idea why the new JK BMS (JK-PB2A16S-20P) has 2 B8 connections printed on the plate above the balance terminals?
Do I miss out the second B8 completely or consider the second B8 as B9 and go on from there.
Just a first observation of the BMS so I might be missing something simple.

This question came up recently. Their website has a wiring diagram posted that shows the second B8 terminal as empty and not used.

Steve_S · Apr 25, 2024

These BMS' support either 8S or 16S. With 8S you use only the 1st & 2nd sense harnesses where with 16S you use all 4.
Each sense harness has it's own Temp Sense (2 black wires).

Here is a slightly sharpened diagram that may help.

Lyn1489 · Apr 25, 2024

Thanks guy's appreciate the help.

JK BMS mis-numbering?

Lyn1489

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BentleyJ

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Steve_S

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Lyn1489

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