My project: I have an electric sailboat with a 5120wh LiFePO4 battery pack made up of 16s 100AH Sinopoly cells. They are arranged in two banks of 8 cells, to either side of the propeller shaft. I already have a BMS setup that can cut out the charger when full and the controller when low, but I of...
My project: I have an electric sailboat with a 5120wh LiFePO4 battery pack made up of 16s 100AH Sinopoly cells. They are arranged in two banks of 8 cells, to either side of the propeller shaft. I already have a BMS setup that can cut out the charger when full and the controller when low, but I don't have direct voltage readings of each cell. These will allow me to take periodic readings, even while under load. I am permanently wiring them into the battery boxes and onto the cell buss bars. I think it is only powered from the lowest cell in the string so in order to avoid imbalanced loads, I will also place a manual switch in-line with the most-negative lead. Even a 10mA asymmetric load, connected 24/7/365 can put even a large pack like mine out of balance after a while. Ideally, I would like a means to get the digital readings into an arduino or raspberry pi to have an accurate log of voltage over time, coupled with load. But for under $4ea, who am I to complain? Pro: - reads voltage of up to 8 cells - very small and easy to integrate into the battery boxes - can't argue with the price. - display is bright, buzzer is loud. Con: - would like to see solder pads for accessing digital voltage readings (feeding an arduino) - would like to see an I/O pin for controlling a relay - not sure of accuracy of voltage readings. There is a little difference from my multimeter. Need to check against a few other meters. - is this module powered from the lowest cell in the string or from the whole string?
This buzzer is a must have for your lipo batteries! The alarm is very loud so you can hear it from a far distance. Ideal for a quadcopter. Would recomment to anyone, I already bought myself a second one... Good packed, arrived in 2 weeks.
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