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1. #BATTERY MONITORING SYSTEM FOR LEAD ACID BATTERY HOW TO#
2. #BATTERY MONITORING SYSTEM FOR LEAD ACID BATTERY MODS#

These switches can be used to automatially switch on a boiler when all batteries are fully charged and charge current is still available, or automatically shut down certain non-essential consumers when SoC drops down a certain value, etc. Remote automatic energy management switches The remote display unit uses the wifi-system to communicate with the BMS unit. This is pretty much a "black box", containing all the voltage, current and temperature sensor connections, two indication LED's, an emergency "disconnect" button, control outputs for a battery cooling fan, battery heater and bi-stable battery disconnector, and an ESP8266 WiFi-unit for communication with webbrowsers, remote displays, remote automatic energy management switches and network services.Īlthough I like the web-interface for maintenance work, I also like to have a comprehensive display/control unit mounted in my navigation corner where I can just glance at the battery status whenever I pass by. Further evolution of this idea led to a layout consisting of the following main units: The BMS main unit OpenHybridBMS was initially centered around an Arduino Mega, but after adding a WiFi network interface utilizing an ESP8266 it became soon clear that the ESP8266 by itself would be fully capable to carry out all the handling and calculations necessary to implement the BMS. Which turned out to become much more complex than estimated. There are some useless features (bluetooth? Do they really think I keep caring for a darn cellphone while sailing in an area without coverage, just to keep track of the batteries?) but they lack important features like the ability to signal when there is surplus charge energy available so it can be used for non-critical devices like fuel polishers etc.Īnd above all, there were no Battery Management Systems available which could work nicely in a hybrid installation. It looks like these manufacturers never sail themselves. And that was a major obstacle, because my life could easily depend on it on the middle of the ocean.Īlso, too many features were missing. This didn't really put confidence in their knowledge about lithium systems. After all, there are so many otherwise respected manufacturers who produce chargers with a "voltage setting" for lithium batteries, while voltage regulation does not work with lithium batteries. With the knowledge I aquired about lithium batteries, I was wondering how many BMS manufacturers really "got it right". This project was started because I was not satisfied with the commercial Battery Management Systems available. Register, manage your data, log in and off Submit your AIS data to aggregation services WiFi with the Ubiquiti Bullet 31 March 2020.Protection against corrosion 17 July 2021.Open source BMS for lithium / lead-acid hybrid installations Lithium implementations 4 December 2019Ī comparison between different implementations.

#BATTERY MONITORING SYSTEM FOR LEAD ACID BATTERY HOW TO#

How to keep Lithium cells safe and healthy

#BATTERY MONITORING SYSTEM FOR LEAD ACID BATTERY MODS#