Quote:
Originally Posted by Mike Dabrowski 2000
During the test, I ran the pack fan at about 11V, and monitored the temperature rise inlet to outlet, and saw no measurable rise above ambient for the whole 12 hour test. The PTC strip was also measured, and it confirmed that there was no measurable rise in temp.
The charger power supplies rose about 5 degrees above ambient, and the CC supply got to about 95F by the end of the test.
Any suggestions as to further test, and further interpretation of the results?
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Mike, I'd run a test with the fan running at the slow speed voltage - whatever that is (6V?) to see if it works, so that you don't have to have it on high all night. I'm fairly confident that it will be enough because 5V handles three sticks charging and discharging at 10amps with no problem.
Also, it would have been helpful to take V readings of each stick before and after. Many fully functional packs will have large variations between the sticks. They shouldn't, but they do. It's important to see that the charger equalizes them. That's the primary purpose of this device. Do you have another pack to test with?
Additionally, 152V is low, but not as profoundly dead as a couple packs I have here. I have a pack that's sitting at about 130V. If you'd like to send me a set of the chargers, I could try it to measure worst-case conditions. To my knowledge, this pack is not damaged, but has been sitting for 3-4 years.
I can also test a trade-in pack that came from a junkyard and then died after the owner installed it in his car and then parked the car for 6 months. Pure P1447. This one will simulate a real world example.
For safety's sake, I'd rather test / charge the 96V and 48V sub-packs separately, as I can leave the breaker off and go in through the rubber plugs. Would this be a major change? I'll want that configuration anyway later for use as an out-of-car top-up charger.
