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electrical:12v:lifepo4_batteries_thread

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electrical:12v:lifepo4_batteries_thread [2017/12/09 14:52]
frater_secessus
electrical:12v:lifepo4_batteries_thread [2017/12/09 15:02] (current)
frater_secessus [LiFePO4 charging for RVs: running barefoot]
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 ==== LiFePO4 charging for RVs: running barefoot ==== ==== LiFePO4 charging for RVs: running barefoot ====
  
-Although his setup does not use it, T1 Terry describes a "​middle 80%" ​approach that works well with Fractional C systems. It can eliminate the need for [[electrical:​12v:​BMS|BMS]] ​balancing+T1 Terry describes a gentle, relatively low-tech ​approach that can work well with vandweller use patterns It does not use a [[electrical:​12v:​BMS|BMS]], judging that in a vandwellers'​ use the BMS introduces more hazards than it alleviates. ​ This approach: 
-  * starts with a balanced battery ​when installing.+ 
 +  * starts with a balanced battery
   * uses moderate terminal voltage (13.8v) to gently rebalance cells((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-77.html#​post1132126)),​((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-44.html#​post1096480)),​ and even become more balanced over time.((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-109.html#​post1142675)) ​ If they do get out of balance for some reason, run more conservative SoC voltages until they can be manually rebalanced.((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-294.html#​post1779359))   * uses moderate terminal voltage (13.8v) to gently rebalance cells((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-77.html#​post1132126)),​((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-44.html#​post1096480)),​ and even become more balanced over time.((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-109.html#​post1142675)) ​ If they do get out of balance for some reason, run more conservative SoC voltages until they can be manually rebalanced.((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-294.html#​post1779359))
-  * charges at less than 1C, common in solar charging+  * charges ​and discharges ​at less than [[electrical:​12v:​battery_capacity|1C]], common in solar charging.  i.e. less than 100A with a 100Ah bank. 
   * keeps the voltage "​between the [voltage] knees",​ 13.8v - 11.8v.((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-103.html#​post1140470)) ​ This is also called the "​middle 80%".   * keeps the voltage "​between the [voltage] knees",​ 13.8v - 11.8v.((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-103.html#​post1140470)) ​ This is also called the "​middle 80%".
-  * does not //require// strapping((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-59.html#​post1118000)) although it is a recommended best practice((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-253.html#​post1574064)) +  * does not require strapping((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-59.html#​post1118000)) although it is a recommended best practice((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-253.html#​post1574064)) 
-  * no BMS required ("​running barefoot"​)+
  
 Since the defining feature of this approach is the lack of BMS, it will be referred to as "​barefoot"​ on this page.  Since the defining feature of this approach is the lack of BMS, it will be referred to as "​barefoot"​ on this page. 
electrical/12v/lifepo4_batteries_thread.txt · Last modified: 2017/12/09 15:02 by frater_secessus