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electrical:12v:drop-in_lifepo4 [2025/04/19 11:30]
frater_secessus [myth: you can't charge Li with a lead battery charger] voltage range 		electrical:12v:drop-in_lifepo4 [2025/05/04 10:19] (current)
frater_secessus [drawbacks of lithium]
Line 43: Line 43:
 ===== drawbacks of lithium ===== ===== drawbacks of lithium =====
  
-  * Li is relatively expensive up front+  * Li has (historically at least) been relatively expensive up front.  Prices started plummeting somewhere around 2024.
   * Li cells need a [[#bms_functions|BMS]] to protect them from damage.((some DIYers run Li "barefoot" (without a BMS) )) For example, Li can be damaged by overvoltage, undervoltage, charging below freezing (32F), etc.  Some batteries have low-temp cutoff and/or internal heating to address the cold-charging limitation.  Most Drop-in Lithium batteries will have a BMS integrated into them, but raw cells do not.   * Li cells need a [[#bms_functions|BMS]] to protect them from damage.((some DIYers run Li "barefoot" (without a BMS) )) For example, Li can be damaged by overvoltage, undervoltage, charging below freezing (32F), etc.  Some batteries have low-temp cutoff and/or internal heating to address the cold-charging limitation.  Most Drop-in Lithium batteries will have a BMS integrated into them, but raw cells do not.
   * Li can be **damaged** by long duration at full charge or high voltage, or high ambient temperatures   * Li can be **damaged** by long duration at full charge or high voltage, or high ambient temperatures
Line 387: Line 387:
   * going into a period where you will need max capacity   * going into a period where you will need max capacity
   * to perform a capacity test   * to perform a capacity test
-  * to reset the BMS amp/SoC counter+  * to [[electrical:12v:battery_monitor#drift_and_reset|reset the BMS amp/SoC counter]]
   * to top-balance cells((to the degree this works))   * to top-balance cells((to the degree this works))
  
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 >> Yes, you can.  Under most circumstances you don't even need to modify your system. >> Yes, you can.  Under most circumstances you don't even need to modify your system.
  
-They do recommend [[electrical:12v:alternator#lithium-specific|a BIM]] or [[electrical:12v:b2b|DC-DC charger]] //for banks >300Ah//.+They do recommend [[electrical:12v:alternator#lithium-specific|a BIM]] or [[electrical:12v:b2b|DC-DC charger]] //for banks >300Ah//.   
 + 
 +If not already present, a small switch to [[electrical:12v:alternator#disabling_alternator_charging|disable the combiner]]((same goes for [[electrical:12v:b2b|DC-DC chargers]])) at will is a good idea. 
  
  
electrical/12v/drop-in_lifepo4.1745076627.txt.gz · Last modified: 2025/04/19 11:30 by frater_secessus

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