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LiFePO4 Smart Midpoint Monitoring and Battery Balancer

Hi,

is there anything to be gained monitoring the mid point voltage, or using a battery balancer, with 2x 12.8v Lithium batteries in series and a ve.bus BMS with Venus?


cheers,

JT

Lithium battery SmartBattery Balancer
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2 Answers
mvader (Victron Energy) avatar image
mvader (Victron Energy) answered ·

There is balancing inside the Smart Lithiums: using a Battery Balancer with Smart Lithiums does not add anything; don't do it.


Mid point monitoring: yes you could do that.

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Can we monitor the mid point even if we have 4 x 25.6V/200Ah LiFePO4 VE Smart in a system on 48V?


Thanks

mvader (Victron Energy) avatar image mvader (Victron Energy) ♦♦ Daniël Boekel (Victron Energy Staff) ♦♦ ·

ps. I recommend to keep an eye out for next weeks VictronConnect release which includes a lithium firmware update (version v1.19). It has several major improvements on balancing behaviour.

mardhin avatar image
mardhin answered ·

Sorry mvader....we have 4 Smart Lithiums batteries 12.8V in Two Strings parallel in Series for an 25,6 V Systems. We have charged all Batteries to 14.2v and then put them togehter. After 30 days the Batteries at the negative Side get charged between 14.27 to 14.35 and the Batteries on the positive Side get charged only between 13.98 to 14.07.

After 8h of balancing the difference is getting better but only a little bit. We tested all Connections and Charched the Batteries again seperatly.

But the Problem is still there. Now our Victron Dealer told us to install an Balancer!!!


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Hi Mardhin, ok - I'll contact you by mail to see what the issue is.