dochubert Posted August 9, 2021 Share Posted August 9, 2021 Thought I would post a picture of my balancer setup now that it is installed. So far, it is only connected to half of my battery bank. My bank is Lifepo4 BYD 24v modules. These are used modules, so they are something short of the 220ah rating they had when new. 16 of them connected for a 48v bank. If new that would make my bank 1760ah at 48v. The original 8 were installed several months ago, and I recently added 8 more to double the size of the bank. This is a massive bettery bank, and being new to Lifepo4, I knew almost nothing of balancing when I started. Tried Daly Bms, 1.2a and 5a active balancers with various degrees of disappointment. They were just too 'small' to have the desired impact. The result was keeping the charging set to 54v instead of the 56v or higher that is possible with these batteries. They stay fairly well balanced at 54v and below, but I should be able to do better. The first thing I should have done, and have done recently, is parallel all the cells. This one action has done more to improve balance than anything else so far. That brings us to today and Sid's balancers. They are mounted on a massive heatsink, with a 5 inch fan on the backside, controlled by the temp controller you see on the right side of the pic. 16 balancers for 16 lifepo4 cells in a 48v bank. If you zoom in you can read the cell volts on each balancer. They are ready to go. Honestly, I don't yet know how well these are going to work, because I only have half of the bank connected, and because charging is still set to 54v. Ran out of wire. In a few days when the additional ordered wire gets here, I'll connect up the other half. Then I can start bumping up the charge voltage gradually, eventually settling at 56v. That puts it at 3.5v per cell. Any cell reaching 3.55v will start 'balancing', meaning it should bleed off voltage until it's back in range. I'm expecting to be impressed with these balancers, and hoping the wire gets here soon. Will update when the other half is connected Quote Link to comment Share on other sites More sharing options...
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