Lthium charged with mppt controler

Rmcgrath53 wrote:
I emailed morning star about the topic and this is there response.







Morningstar Corp. Tech Support via 2v4xqg71s4mcvgo6.4x8azg5z2ljisu01.qn4ugr2.3-oneaeai.na13.bnc.salesforce.com


1:45 PM (2 hours ago)








to me

??what is meant by battery management system . ??and does it mean the float and equalizing function not needed?

Thanks
Ron








Two main types of Lithium batteries:

Lithium ion: With some system modifications, lithium-ion batteries can be used with Morningstar MPPT controllers (TriStar and SunSaver). The battery bank must have a built-in or connected battery management system to monitor cell voltages. Further, the battery management system must NOT have an automatic full charge disconnect feature that breaks the controller connection to the battery. The controller will not operate without a power source. Finally, the controller needs to be programmed / set to disable the float and equalization stages so that current to maintain absorption voltage will be available at all times.

LiFePo4: Even though Morningstar controllers are designed for use with lead-acid batteries, lithium iron-phosphate batteries can be used successfully with programmable units. If using this battery technology, please check with the manufacturer for recommended set-points and current restrictions.

Any diversion function would require a separate Diversion Controller, such as the TS-PWM controller.

what is meant by battery managemwhat is the ent system ...and does it mean the float stage and the equalize stage are not used

Lithium batteries HATE to be over charged, HATE being over discharged, HATE having too much current drawn, HATE being force fed too much charge current.

Hence as to why they REQUIRE a BATTERY MANAGEMENT SYSTEM which monitors each cell voltage, current and such..

The management system will shut off current in the even of over discharge, over charge, too high of charge voltage and so on..

Run without this protection and the result is nothing short of a spectacular 2300F degree fire..

Unless you really have top notch understanding of all the charge/discharge parameters of Lithium batteries it is best to leave them in profession hands..

Perhaps another 10 or 15 yrs they will find better ways to deal with the potential hazards but not as of yet..