![]() Prior to hooking up my charger last night, I ran Forscan and looked at the other battery parameters, including charge state which was only 49%. These were alarm system backup batteries, not automotive chargers, so the entire system operation profile is different and hence my search for the experience of others. Just to give this more background, I'm an electical engneer who has written the software for battery chargers. IIRC changing that parameter forces a reset, which makes sense. If you install something other than an equivilent battery size and ttype (AGM instead of flooded, for example) then that parameter should be changed before you do the reset. ![]() Worst case is I have to buy another battery and do the reset on a new battery and get everything back in sync.Ĭlick to expand.There are settings in the BMS for battery type and CCA capacity. I think I'll reset it and see how it goes. and I'm guessing none has seen this post. Unfortunately only a Ford engineer with knowledge of the charging algorithims could answer the question definitively. At this point the question is whether using a new battery charge profile on a 1 year old battery is more or less damaging than using the charge profile for a 7 year old battery.įor anyone interested, here is the patent on the system: Ford BMS patent It tells, somewhat techncially, what the system is supposed to do but I expect that most readers here will get the general idea. That may decrease the life of the new battery. My concern is that the BMS programming may be over or under charging the battery slightly based on its belief that the battery is 7 years old and has a higher sulfation level than a new battery. Despite the lack of clear direction (to be generous) in the owner's manual, I think that a BMS reset when replaced is a requirement for optimum battery life and performance. Battery size is also an important piece of the equation. However, battery age is an important factor in charge rate and system health determination. It should not shut down any functions with the battery charge state at a high enough level and that determination should not be related to Time in Service (TIS). I would expect that the BMS can tell the state of charge and work out the health level of a battery within certain limits.
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