AGM Adventures- Update
Updated 31 Jan 17 Initial results. I will re-test the AGM after it does one deep cycle to confirm these results. EDIT completed 6 Oct Test was to put the test battery as the only battery run...
Forum Discussion
Señor BFL13,
I have laid hands on OUCH! AGM batteries underhood, basking in 13.9 volt conditions that had done so for years and years of service. They did not vent.
Generally speaking insane voltage can be applied (in the sixteen volt range) and even then it takes (some) time buildup for an AGM to vent. The higher the saturated mat temperature the less voltage it will take to electrolysize the electrolyte. It is not recommended to attempt a Mother Fletcher's When Does It Vent experiment.
Temperature has a significant effect on an AGM. So don't trivialize it when appraising ideal environments. I would rather maintain a Lifeline at 13.8 volts at 20c than at 13.1 volts at 50c Keep it in mind these are generalizations and not hard and fast connect-the-dots laws.
How many square inches in a group 31 jar side? Not an end - a side. Now factor a one PSI increase wall load. How many pounds of pressure are being exerted on that wall? Think it won't bulge?
Recombination Caps do a remarkably efficient job. Of course there is a limit. Just like an auto seat belt. Exert 20G shock loading factor of a 250 lb individual and it'll rip the seat belt anchors right out of the floorboards.
Read the Lifeline manual. It suggests an idea of the point at which the Lifeline MAY be expected to vent. There are variances in construction of an AGM but they are not -that- different.
The speed of temperature buildup is a crucial value in determining when the point of "enough" has been reached and "too much" is at hand. I keep an IR gun at the door of the gen shed and I will shoot some end bank terminals during 500 ampere recharging. The end is the weak sister pair of cells so it is most prone to gain temperature.
I have laid hands on OUCH! AGM batteries underhood, basking in 13.9 volt conditions that had done so for years and years of service. They did not vent.
Generally speaking insane voltage can be applied (in the sixteen volt range) and even then it takes (some) time buildup for an AGM to vent. The higher the saturated mat temperature the less voltage it will take to electrolysize the electrolyte. It is not recommended to attempt a Mother Fletcher's When Does It Vent experiment.
Temperature has a significant effect on an AGM. So don't trivialize it when appraising ideal environments. I would rather maintain a Lifeline at 13.8 volts at 20c than at 13.1 volts at 50c Keep it in mind these are generalizations and not hard and fast connect-the-dots laws.
How many square inches in a group 31 jar side? Not an end - a side. Now factor a one PSI increase wall load. How many pounds of pressure are being exerted on that wall? Think it won't bulge?
Recombination Caps do a remarkably efficient job. Of course there is a limit. Just like an auto seat belt. Exert 20G shock loading factor of a 250 lb individual and it'll rip the seat belt anchors right out of the floorboards.
Read the Lifeline manual. It suggests an idea of the point at which the Lifeline MAY be expected to vent. There are variances in construction of an AGM but they are not -that- different.
The speed of temperature buildup is a crucial value in determining when the point of "enough" has been reached and "too much" is at hand. I keep an IR gun at the door of the gen shed and I will shoot some end bank terminals during 500 ampere recharging. The end is the weak sister pair of cells so it is most prone to gain temperature.
