2 layers

SodiumBMS

BMS for sodiumflashlight, based on STM32

Copper layers: 2
Thickness: 1.6 mm
Parts: 43
Nets: 102
Pads: 185
Tracks, vias: 0, 0
Routed: Not yet
KiCad: KiCad 10.99 (file 20260206)
Created: 31 May 2026
Updated: 3 Sep 2026

Overview

SodiumBMS is an open-source printed circuit board by nau5ea, from the nau5ea/sodiumBMS repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board with 43 parts on 102 nets.

It is built around the TPS61088RHLR and AO3400A. Its parts include 18 resistors, 17 capacitors, 4 ICs, 2 transistors and 1 inductor. It belongs with the power boards and the STM32 boards of this library.

Main components

README

readme.md

Sodium Battery Management System (BMS)

A BMS for sodium-ion 18650 cells in 3S configuration (3 series 18650s)

We used:

KiCAD for designing schematic/PCB
STM32 as our microcontroller
C/C++ for our firmware

This project is GPLv3 licensed

Authors

Louis "Buddy" Moench
Soham Kalbag

Parts

Qty	Value	Footprint	References
3	1.5nF ish	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C1, C2, C3
3	10uF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C7, C9, C17
3	20k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R1, R4, R6
2	0.05	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R7, R8
2	100k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R2, R18
2	100nF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C15, C16
2	22uF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C13, C14
2	5.1k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R9, R10
2	AO3400A	Package_TO_SOT_SMD:SOT-23	Q1, Q3
1	0.47uF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C5
1	1.4uH	Inductor_SMD:L_0201_0603Metric	L1
1	162k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R11
1	1uF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C8
1	20.5k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R13
1	261k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R12
1	3.3k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R16
1	30k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R17
1	33uF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C4
1	4.7uF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C6
1	40.732pF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C12
1	40k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R3
1	60k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R5
1	8.2nF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C10
1	825k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R14
1	856.774pF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C11
1	92k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R15
1	Fuse	Fuse:Fuseholder_Clip-5x20mm_Eaton_1A5601-01_Inline_P20.80x6.76mm_D1.70mm_Horizontal	F1
1	INA2180A4	sodiumBMS_extras:WSON8_DSG_TEX	U6
1	LM3940	Package_TO_SOT_SMD:SOT-89-3	U4
1	STM32F446RETx	Package_QFP:LQFP-64_10x10mm_P0.5mm	U1
1	TPS61088RHLR	footprints:RHL0020A	U5

Questions

What parts does the SodiumBMS use?

43 parts, built around the TPS61088RHLR and AO3400A. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the SodiumBMS KiCad files?

From the nau5ea/sodiumBMS repository on GitHub, at the commit this page was made from: the board is kicad_files/sodiumBMS.kicad_pcb and its schematic kicad_files/charging.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the SodiumBMS design in my own project?

Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Category and platform

Power STM32

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/nau5ea-sodiumbms" title="SodiumBMS in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/nau5ea-sodiumbms.jpg" alt="SodiumBMS" width="1200" height="900">

A picture that opens the board, for a README

[![SodiumBMS](https://pcbkit.io/embed/boards/nau5ea-sodiumbms.jpg?size=s)](https://pcbkit.io/boards/nau5ea-sodiumbms)

Source

Repository: nau5ea/sodiumBMS
Board file: kicad_files/sodiumBMS.kicad_pcb
Commit: d3a2b0d
Licence: GPL-3.0

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