If you want to do lifepo4 right, here are the key points (In my opinion).
1. After a discharge, a boost charge at a voltage of around 3.5-3.65V/cell should be applied to recharge the battery, until you reach termination charge current. 2. After boost charge is complete, you may want to hold voltage for a period of time to allow the BMS to top balance the cells. Your BMS will likely be programmed to top balance above 3.4V/cell. I like to hold the pack voltage at just above 3.4V/cell for as long as it takes for this top balance to complete. 3. After the top balance is complete you should switch to a float charge of 3.375V/cell for maximum lifespan. Holding voltage higher in float can lead to pack swelling and lower lifespan. 4. Batteries should not be charged in any way at or below freezing temperatures, discharging is ok. 5. Batteries not being used (spares) should have the BMS disabled to avoid BMS induced self discharging. Peter Kranz <http://www.unwiredltd.com/> www.UnwiredLtd.com Desk: 510-868-1614 x100 Mobile: 510-207-0000 <mailto:pkr...@unwiredltd.com> pkr...@unwiredltd.com
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