Arduino battery monitoring system12/26/2023 ![]() Information is received from the BMS via the CAN bus all easily customised through Ewerts computer software.Īrduino is the name of the mini computer that powers this instrument. With the use of a CAN bus shield, 128圆4 pixel OLED display, a single push button and an Arduino Uno this instrument is much more sophisticated than a €250 battery monitor from a respectable manufacturer and in my case for ⅕ of the price. I found it lacked the information I wanted but more frustratingly unable to store the state of charge when I turned the system off, essentially showing 100% battery capacity every time I turned the power back on regardless of the actual battery state. This is also an expensive piece of equipment which I found disappointing despite having purchased a well reputed one. The BMS itself in many cases require a display or instrument to give us information during usage. ![]() The Orion Jr from Ewert Energy Systems offered me this and included an option with CAN bus interface, which is a universal way of transferring data, commonly used in automobiles. I wanted a unit separated from the cells itself for protection from moisture, be able to customise data output, use CAN bus and have good cell balancing algorithm and capacity. The quality of the system is essential for the safety, reliability and durability of the system. There are several manufacturers of BMS with significant price variations. They are devices with several sensors and inputs effectively controlling contactors and relays (electrically operated switches) cutting off appliances should there be a need for this. We require something to tell us the status and also safeguard us from these undesirable conditions as we can't monitor them at all times during usage and charging. ![]() Your browser does not support HTML5 video.īattery management systems (BMS) can be quite expensive but are an essential part of the equipment when dealing with Lithium battery technology, as they don't like being depleted or charged excessively. ![]() Your browser does not support HTML5 video. ![]()
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