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opinion:frater_secessus:dead_battery [2022/08/03 20:29]
frater_secessus [sources of charging] 		opinion:frater_secessus:dead_battery [2022/08/03 20:37]
frater_secessus [replace any damaged components]
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 ====== How to handle a dead house battery ====== ====== How to handle a dead house battery ======
  
-If your house bank ("auxilliary battery") is dead (nothing is working) we have both short-term and long-term problems.  Let's start with the short term issues.+If your house bank(("auxilliary battery")) is dead and nothing is working we have both short-term and long-term problems.  Let's start with the short term issues.
  
 ===== first things first ===== ===== first things first =====
Line 36: Line 36:
  
 Yes, your battery may be toast but there is no use replacing it until you get the underlying issues fixed.  If you replace the battery with the same problems [[electrical:batterycide|it will be murdered]], too.  Yes, your battery may be toast but there is no use replacing it until you get the underlying issues fixed.  If you replace the battery with the same problems [[electrical:batterycide|it will be murdered]], too. 
 +
 +
 +===== lithium considerations =====
 +
 +With lithium banks over-discharge is not the only problem that can cause the battery to stop working.  The BMS can also shut down the party if temperature is too high or low, if current is too high, or if individual cell voltages are out of whack.
 +
 +
 +
 +==== resetting the BMS ====
 +
 +Some Li batteries have special devices that can be inserted into ports to reset the BMS.  Most, however, use a separate charging source to tell the BMS all is well.  Something like 13v and 3A is typical.  Save the vigorous charging for after the underlying problem is addressed. 
 +
 +
 +==== addressing the problem ====
 +
 +If the BMS shut off because of freezing temperatures it is critical to warm the battery before charging.  
 +
 +If the BMS shut off because of cell imbalance try charging to a lower Absorption(("boost")) voltage like 13.8v.  
 +
 +If the BMS shut off because of overcurrent discontinue the load that caused it. 
 +
 +After the underlying issue is address charge the bank gently to a normal SoC((≥20%)) before charging with full force. 
 +
  
  
opinion/frater_secessus/dead_battery.txt · Last modified: 2022/08/06 19:20 by frater_secessus

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