WBAT battery life testing

leviner commented 1 month ago

Set up for cold room testing, beginning 09/19 at UW (Marine Science Building, Room 301).

leviner commented 1 month ago

Original bench test with the dual (internal/external) 18V battery setup.

leviner commented 3 weeks ago

@AlexDeRobertis-NOAA I stopped by UW thinking it would be dead today, still going, just crossed about 55 Ah.

AlexDeRobertis-NOAA commented 3 weeks ago

That's really good news.

leviner commented 2 weeks ago

The energizer bunny really lived up to its reputation at 2C.

Based simply on number of pings, it ran for 88.9% of the time it did at room temp. Final voltages after getting it out of the cold room:

With the batteries disconnected:
- RBR reading 14.1V
- Internal battery reading 13.8V
With the batteries connected:
- 13.8V with WBAT asleep
- 13.2V with WBAT awake
- 13V being reported by WBAT after restart (note, this was when the system was out of the cold room for ~15 minutes)

This is performing better than what would be anticipated from the energizer documentation so a quick -2 vs 2 C fan test will be informative:

AlexDeRobertis-NOAA commented 2 weeks ago

Success!

We agreed to shoot for 80 AH for the Kodiak deployment and then run down the remainder after 1 year. This, combined with freezer tests (4 cells at -2 and 2 deg) should allow us to decide on conservative AH for a NBS mission.

leviner / MooringRedesign

WBAT battery life testing #3

Success!