HI,
I recently bought a Victron IP22 Blue charger 30Amp. I tried charging a lithium battery which was sitting at 60% capacity, which it did…but once the battery got to 100% on the app that belongs to the battery, the charger just kept going at 30amps. I switched off the charger because I was worried about overcharging it. I had the charger set for LI-ion…is their anything i might be doing wrong, or would the app be giving me in-correct information. Any help would be appreciated.
Lithium takes all it can till fully charged. What was the voltage? The lion setting should be 14.2V charge voltage. Can you see the individual cell voltages? Some BMSs will reset the stage of charge to 100% when one cell get to 3.5V for example but there needs to be the absorption stage to finish saturating the lithium battery and balance the individual cells. You can also drop the current lower 15A for night mode or 7amps to 30amps in the advanced settings.
Fully charged all cells read 3.4v. I have a Renogy 200ah Pro with bluetooth. I did drop the voltage in the Victron app to 20 amps, but it just wanted to keep going. According to the graph on the victron app, it was going to run for a while. I was worried and turned off the charger. I’m not sure if I’m getting wrong readings from the renogy dc home app.
That’s a big battery you will need the 30amps otherwise you will be charging much longer. You can’t overcharge a lithium battery with a BMS it will disable the charge MOSFET when the voltage of one cell is too high which should be 3.65V.
Just let the charger do its thing and the battery do its thing you are fine both products are good quality. You can use the full current if you want to charge fast or select a lower one. The Victron charger is fine will do 30A has a fan.
Hi Owen,
Thanks mate. I kinda figured it out. I went into expert mode, and set it to the Preset Smart Lithium (LiFePo4) mode…seems much happier now and the charge rate is spot on at 14.20v. The Renogy BMS is quite advanced. Yes I reset it back to 30amp charge now everything seems fine.
Check what voltage it needs from the data on the battery or manual you got with it you might need to increase it to 14.4V or 14.6V. That setting is for the victron smart lithium with a slightly different chemistry and lower charge voltage.
But 14.2V is fine.