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This is an open source BMS for your home-made electric vehicle, home storage battery or any other battery project! It includes files to help you build and program your own circuit boards. You will need to get the circuit boards made, buy the components and solder them to the boards, then program the chips on the boards.
There is one master board and multiple module boards.
The master has a screen to let you know what is going on. It also has a LED as a warning light in case a fault occurs (low cell voltage for example).
You need to make one module for each cell in the battery pack.
Features
- Pack Voltage
- Cell Voltage
- Cell Temperature
- Data Logging via connected laptop
- Identifies the source of a communications fault
- Disables charger when the pack is charged, or when there is a fault
- Displays a fault code and lights a LED with any fault
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User Reviews
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I have recently bought an electric car with this BMS installed. (1988 BWM 318 - I think it was the first version of this BMS by the original designer.) I didn't realise this BMS project was still alive as the original web page hasn't been updated since 2011. Perhaps it's worth posting a message on this page: ecomodder.com/wiki/index.php/Open_ReVolt/PCB_Schematics#Open_ReVolt_-_CellTop_Battery_Management_System_.28Rev1.29 to redirect people to here ?? Anyway, on to the review: It's a great BMS, it has all the essential features, low cell voltage alert, high cell voltage alert, but the best part is the LCD display. The master LCD is fantastic ! It has been very useful to know the cell that has the lowest voltage. I have just replaced 6 cells in my car's 135 cells pack, using the BMS to help find the weakest cells :) No other low cost, cell top BMS offers this level of information.