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20200103 8SBMS A0

simple-ee·mBMS·Schematic/The BMS Board/20200103_8SBMS_A0.kicad_pcb

20200103 8SBMS A0 PCB layout, top view — open source AVR/Arduino board by simple-ee
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About the 20200103 8SBMS A0 PCB

20200103 8SBMS A0 is an open source AVR/Arduino PCB design by simple-ee, published on GitHub under the MIT license. It is a board measuring 55.9 × 49.7 mm, with 70 components from 29 distinct parts.

Its main chip is the ATMEGA328PB-AU, from the AVR/Arduino family. Other key parts include the 8S_PASSIVE, ADS1119IPWR and TPS560430YFDBVR. By type, the board carries 25 resistors, 17 capacitors, 9 fuses, 8 connectors, 5 ICs and 3 inductors.

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

From the project

This is the modular BMS for use with 8S LiFePO4

Right now I'm essentially maxed out resources and memory on the atmega328PB and cannot add anymore features which is why I'm planning on upgrading the design.

Even though this design is now my old design its still very functional and very stable as it has been running my 4kWh system for about 6 months and protecting the cells perfectly.

The reason for making it a modular design is for easy upgradability and also, considering the current chip shortage, is to replace sections of the board in case there are no parts available. This will prevent the need to redo and re-layout of the entire…

20200103 8SBMS A0, from the project README
From the project README

Main components on the 20200103 8SBMS A0

8S_PASSIVEATMEGA328PB-AUADS1119IPWRTPS560430YFDBVR

20200103 8SBMS A0 bill of materials (BOM)

70 components, 29 distinct parts.

QtyPartRefs
1
8S_PASSIVE
U101
1
ATMEGA328PB-AU
U201
2
ADS1119IPWR
U301, U302
1
TPS560430YFDBVR
U401
1
CB3-3I-16M0000
Y201
2
S5B-PH-SM4-TB(LF)(SN)
P201, P202
1
S6B-PH-SM4-TB(LF)(SN)
P203
1
S2B-PH-SM4-TB(LF)(SN)
P204
1
S9B-PH-SM4-TB(LF)(SN)
P301
2
SMD_1POS_1x2mm
P401, P402
1
PH1RB-03-UA
P403
9
0686F1000-01
F301, F302, F303, F304, F305, F306, F307, F308 +1
1
PRTR5V0U2X,215
D201
1
DESD34VS2SO
D401
1
LQH43PN100M26L
L401
1
MLZ2012DR10DT000
L402
1
MLZ2012N100LT000
L403
12
CL10B104KB8NNNC
C201, C202, C203, C204, C205, C206, C301, C302 +4
2
GRM188R6YA225MA12D
C401, C402
1
C0603C104K5RACAUTO
C403
Show 9 more
QtyPartRefs
1
CC0603KRX7R6BB684
C404
1
C1608X5R1A685M080AC
C405
5
ERA-3AEB103V
R201, R202, R203, R204, R205
1
RR0816P-102-D
R206
8
RT0603BRE07673KL
R301, R303, R305, R307, R309, R311, R313, R315
8
ERJ-PB3B4222V
R302, R304, R306, R308, R310, R312, R314, R316
1
CPF0603F100KC1
R401
1
ERJ-3EKF8872V
R403
1
RR0816P-2212-D-34C
R404

20200103 8SBMS A0 design files

The KiCad project lives in the simple-ee/mBMS repository on GitHub; these links point at the commit this page was built from.

20200103 8SBMS A0: common questions

What microcontroller does the 20200103 8SBMS A0 use?

The 20200103 8SBMS A0 is built around the ATMEGA328PB-AU, from the AVR/Arduino family.

How big is the 20200103 8SBMS A0 PCB?

The 20200103 8SBMS A0 measures 55.9 × 49.7 mm and is 1.6 mm thick.

How many components are on the 20200103 8SBMS A0?

70 components, from 29 distinct parts. The full bill of materials is listed on this page.

Where can I download the 20200103 8SBMS A0 design files?

From the simple-ee/mBMS repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the 20200103 8SBMS A0 design in my own project?

Yes, under the terms of its MIT license, which simple-ee chose for the repository.

Can I test firmware for the 20200103 8SBMS A0 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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