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electrical:batterycide [2021/06/03 12:36]
frater_secessus [murdering flooded lead-acid] 		electrical:batterycide [2024/06/15 21:48]
frater_secessus [murdering flooded lead-acid]
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   * discharging too deeply.  Discharge with lead-chemistries is typically limited to 50% [[electrical:depth_of_discharge|depth of discharge]] as a compromise between cycle life and bank size.     * discharging too deeply.  Discharge with lead-chemistries is typically limited to 50% [[electrical:depth_of_discharge|depth of discharge]] as a compromise between cycle life and bank size.  
   * allowing the cells to get low on distilled water.  Check them 1x/month or so until you learn their personality.   * allowing the cells to get low on distilled water.  Check them 1x/month or so until you learn their personality.
 +  * exposing them to heat, as in an engine bay
  
 ===== murdering AGM ===== ===== murdering AGM =====
Line 35: Line 36:
  
   * overvoltage.  [[electrical:12v:lifepo4_batteries_thread|13.8v is a safe upper limit]] without BMS and will charge the bank completely.  Some experienced folk use slightly higher voltages for faster charging but it must be terminated quickly as the bank approaches 100% state of charge.  Exception:  Lithium banks with BMS typically overcharge intentionally to balance cells.  The overcharge is consumed by resistors and does not actually go into the cell.     * overvoltage.  [[electrical:12v:lifepo4_batteries_thread|13.8v is a safe upper limit]] without BMS and will charge the bank completely.  Some experienced folk use slightly higher voltages for faster charging but it must be terminated quickly as the bank approaches 100% state of charge.  Exception:  Lithium banks with BMS typically overcharge intentionally to balance cells.  The overcharge is consumed by resistors and does not actually go into the cell.  
-  * long periods of 100% state of charge;  cease all charging at 100% and only charge that high if you know some loads will be applied immediately.  Lithium chemistries do not care about partial state of charge so use that to your advantage.+  * long periods of 100% state of charge;  cease all charging at 100% and only charge that high if you know some loads will be applied immediately.   
 +    * IF you're storing the van or know you're not going to be using the batteries for more than a couple days, it's strongly recommended to leave lithium batteries at 50-80% SOC. Lithium chemistries do not care about partial state of charge, and actually prefer it..
   * exposure to high heat   * exposure to high heat
   * attempting to charge at below freezing   * attempting to charge at below freezing
electrical/batterycide.txt · Last modified: 2024/06/15 21:48 by frater_secessus

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