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--- electrical:12v:drop-in_lifepo4 [2025/11/22 00:15]
frater_secessus [BMS features and specs] added caveats of active balancing
+++ electrical:12v:drop-in_lifepo4 [2025/11/22 00:16] (current)
frater_secessus [BMS features and specs]
@@ Line 157: / Line 157: @@
 **Capacitive balancing** wastes less power since most of the excess is transferred to the low cell[s].  There are efficiency losses involved (~50%((https://www.ti.com/download/trng/docs/seminar/Topic%202%20-%20Battery%20Cell%20Balancing%20-%20What%20to%20Balance%20and%20How.pdf))) but it's far less than the 100% loss of passive balancing.  The main drawbak of capacitive balancers is the current spec (like 5A) only occur at huge deltas;  the rest of the time the balancing current is much lower.
-Heads up:  because active balancers are just shuffling voltage between cells they can theoretically overdischarge the cells.  To avoid this:
+Heads up:  because active balancers are just shuffling voltage between cells they can overdischarge the cells if left alone without adult supervision.  To avoid this:
   * use [[electrical:12v:lvd|an LVD]] to cut the circuit to the balancer's single NEG lead when pack voltage is <13.0v or some other value of your choosing. Or,

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