Repository files (latest commit first)
Filename	Latest commit message	Latest commit date
Kirk Smith 26670d83d9 readme		2026-07-31 18:45:41 +02:00
.forgejo/workflows	lowering double reservoir spillover height for daniel's test	2026-02-04 17:55:05 +01:00
CAD	readme	2026-07-31 18:45:41 +02:00
docs	cad	2026-07-31 18:42:32 +02:00
firmware/ArduinoUnoR3_MotorControl	CAD: a static non-flow frame added for testing flooded chemistries. improved Arduino case. Standoffs for motors to decrease depth of jig to fit easier into secondary containment	2026-05-01 11:59:27 +02:00
.gitattributes	initial KiCad scheme	2025-02-02 13:40:32 +01:00
.gitignore	added export script, minor docs edits, fix endplate barb hole diameters (again?), STLs should export with correct orientation now	2026-03-17 16:00:58 +01:00
certification-mark-FR000028-wide.svg	add OSHWA cert	2025-10-15 15:04:56 +02:00
CHANGELOG.md	improving auto-export for better docs	2026-07-12 21:27:48 +02:00
LICENSE	Initial commit	2023-09-25 08:26:22 +00:00
README.md	readme	2026-07-31 18:45:41 +02:00

About

This kit is for testing flow battery components and electrolytes at a benchtop scale (2 cm²) with an affordable, reproducible setup.

Documentation

Documentation to build the kit, which includes the BOM, is available here (latest version, with file previews), or locally in the repo here (current version, without file previews).

Maximize off-the-shelf component and material availability.
Impervious graphite or polymer-graphite composite materials are hard to source. Instead we use graphite foil, which is affordable, easily sourceable and works well enough to perform cycling experiments at this scale.
No flow fields. We use flow-through graphite felt porous electrodes, and the design is parametric to handle different thicknesses
No milling of graphite or plastic.

CAD directory: FreeCAD and KiCAD design files
- FreeCAD directory: FreeCAD files
- KiCAD directory: KiCAD project files
- exports directory: files for manufacturing components and rendering documentation
- imports directory: files imported by FreeCAD for creating assembly
docs directory: documentation written with GitBuilding
firmware directory: code for pump speed controllers based on Arduino Uno R3

Please see the contributing guide on our website!

Discussion about the project happens on the FBRC forum!

FAIR Battery project (collaborators)
White, R. E. Electrochemical Cell Design; Springer US: Boston, MA, 1984.
O’Connor, H.; Bailey, J. J.; Istrate, O. M.; Klusener, P. A. A.; Watson, R.; Glover, S.; Iacoviello, F.; Brett, D. J. L.; Shearing, P. R.; Nockemann, P. An Open-Source Platform for 3D-Printed Redox Flow Battery Test Cells. Sustainable Energy Fuels 2022, 6 (6), 1529–1540. https://doi.org/10.1039/D1SE01851E.
Arenas, L. F.; Walsh, F. C.; León, C. P. de. 3D-Printing of Redox Flow Batteries for Energy Storage: A Rapid Prototype Laboratory Cell. ECS J. Solid State Sci. Technol. 2015, 4 (4), P3080. https://doi.org/10.1149/2.0141504jss.
https://codeberg.org/LibreWater/Acraea-Prototype
https://github.com/opulo-inc/lumenpnp/tree/main
https://openflexure.org/