open-dyson-battery

Open source implementation of Dyson cordless vacuum cleaner battery firmware.

DISCLAIMER

This project is created for purely educational purposes. Li-ion batteries are high energy devices that may catch fire or explode if mishandled. Review the code and use it at your own risk.

Features

Current status of firmware is 'proof of concept'.

Implemented features:

• Basic button handling. Turn on/off.
• Charging (without temperature monitoring)
• Stop charging by voltage monitoring of each cell.
• Stop operation if voltage of any of the cells is dropped below limit.
• Basic LED indication (charging, operation)

TODO

• Temperature monitoring (external and internal thermistors)
• Show charge state with LED
• Show level of cells unbalance with LED

Hardware

All older Dyson batteries are based on pic16lf1847 microcontroller with ISL94208 battery controller. Both ICs have excellent documentation from the manufacture.

Dyson V6 battery

Reverse engineered schematic of v6 battery with marking 188002 on the board.

Dyson V8 battery

This is pretty much the same as v6 with some minor changes. Reverse engineered schematic of v8 battery with marking 180207 on the board.

Contributing

Pull requests for new features, bug fixes, and suggestions are welcome!

License

MIT