User Tools

Site Tools


electrical:12v:drop-in_lifepo4

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
Next revision Both sides next revision
electrical:12v:drop-in_lifepo4 [2022/11/06 10:52]
frater_secessus [Why are manufacturer-recommended charging voltages so high?]
electrical:12v:drop-in_lifepo4 [2023/01/11 18:35]
frater_secessus [myth: you can't charge Li with a lead battery charger]
Line 30: Line 30:
   * Li batteries are not vulnerable to [[electrical:12v:psoc|partial states of charge]] like Pb.  If anything they //prefer// sitting at PSoC.   * Li batteries are not vulnerable to [[electrical:12v:psoc|partial states of charge]] like Pb.  If anything they //prefer// sitting at PSoC.
   * flat voltage curve - stable voltage over much of its state of charge   * flat voltage curve - stable voltage over much of its state of charge
-  * very little Peukert effect (reduction of capacity at higher discharge rates)+  * very little reduction of capacity at higher discharge rates compared to lead((there is a non-Peukert mechanism that starts to attenuate apparent capacity at very high C rates))
   * much less voltage sag under heavy loads   * much less voltage sag under heavy loads
  
Line 208: Line 208:
   - decide whether the charger can charge to mfg specs   - decide whether the charger can charge to mfg specs
  
-Armed with a full understanding, here is one approach to thinking about lead battery charger setpoints:+Armed with a full understanding, here is one approach to thinking about lead battery charger setpoints for lithium banks:
  
   * **Absorption voltage** (Vabs) - whatever charging voltage your battery manufacturer recommends.((see the section on longevity in this article))   * **Absorption voltage** (Vabs) - whatever charging voltage your battery manufacturer recommends.((see the section on longevity in this article))
Line 262: Line 262:
 see [[electrical:12v:directcharginglfp#assessing_your_setup_for_direct_alternator_charging|this section]] see [[electrical:12v:directcharginglfp#assessing_your_setup_for_direct_alternator_charging|this section]]
  
-=== but that Victron video===+=== but that Victron video ===
  
 Why would a manufacturer of pricey [[electrical:12v:b2b|DC-DC chargers]] want to publish [[https://www.youtube.com/watch?v=jgoIocPgOug|a video]] of a big LFP pack smoking a car alternator?((7:01))  And why would they turn comments off?  Oh, right.   Why would a manufacturer of pricey [[electrical:12v:b2b|DC-DC chargers]] want to publish [[https://www.youtube.com/watch?v=jgoIocPgOug|a video]] of a big LFP pack smoking a car alternator?((7:01))  And why would they turn comments off?  Oh, right.  
electrical/12v/drop-in_lifepo4.txt ยท Last modified: 2024/04/12 23:02 by frater_secessus