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OSBMS slave 20ohm

Teslafly·Dead-OpenBMS-dead·Hardware/Cell manager board V2 12S/old REVs/Rev 0.4/OSBMS slave 20ohm.kicad_pcb

OSBMS slave 20ohm PCB layout, top view — open source board by Teslafly

About the OSBMS slave 20ohm PCB

OSBMS slave 20ohm is an open source PCB design by Teslafly, published on GitHub. It is a 2-layer board measuring 49 × 49 mm, with 69 components from 19 distinct parts.

Other key parts include the ATA6870N_BMS. By type, the board carries 36 resistors, 10 capacitors, 6 transistors, 6 diodes, 5 connectors and 1 IC.

It belongs with the power & battery designs in this gallery.

From the project

A scalable, open source battery management system

THIS PROJECT IS DEAD. The avalibility of other projects and low cost off the shelf solutions has imporved significantly to where this project is no londer needed.

A much more mature open source bms that I recommend is https://github.com/EnnoidMe/ENNOID-BMS that has all the features that I had wanted to implement. Off the shelf hardware is available for that too if you don't want to build your own.

OSBMS slave 20ohm, from the project README
From the project README

Main components on the OSBMS slave 20ohm

ATA6870N_BMS

OSBMS slave 20ohm bill of materials (BOM)

69 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATA6870N_BMS
U1
6
BSS138
Q1, Q2, Q3, Q4, Q5, Q6
1
CONN_01X07
P1
1
EXT-TMP
P2
2
CONN_01X09
P3, P4
1
CONN_01X01
P5
1
via
28 mil Id via
3
1K_PACK
RP1, RP2, RP3
1
THERMISTOR
TH1
6
LED
D1, D2, D3, D4, D5, D6
8
100nF
C1, C2, C3, C4, C5, C6, C7, C8
1
10uF PolC
C9
1
33uF PolC
C10
1
121KΩ
R1
2
10KΩ
R2, R3
2
10Ω
R4, R5
1
1K
R6
6
100Ω
R7, R8, R9, R10, R11, R12
24
82.5Ω
R13, R20, R21, R22, R23, R24, R25, R26 +16

OSBMS slave 20ohm design files

The KiCad project lives in the Teslafly/Dead-OpenBMS-dead repository on GitHub; these links point at the commit this page was built from.

OSBMS slave 20ohm: common questions

How big is the OSBMS slave 20ohm PCB?

The OSBMS slave 20ohm measures 49 × 49 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the OSBMS slave 20ohm?

69 components, from 19 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the OSBMS slave 20ohm design files?

From the Teslafly/Dead-OpenBMS-dead repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the OSBMS slave 20ohm design in my own project?

The repository has no license, so all rights stay with Teslafly. Use it as a reference, and ask the author before reusing the design.

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