ThinkJet 2225B battery pack question

[Dave Frederickson]

(05-25-2020 09:02 AM)hfischer Wrote:  One question remains: should the Picofuse be slow or quick (I have ordered both kinds)?

I don't have a definitive answer, but after comparing images of many pico fuses, I've been unable to find any pics of a slow-blow fuse like the one pictured in the tutorial. So I'm going to say it's fast-blow.

If I'm wrong, worst case is you'd experience nuisance blows. If that happens then switch to the slow-blow fuse.

I did find some info on NiCD and NiMH Pack Design.
http://www.dalitech.com/Resources/NiCd%2...Design.pdf

Paragraph 7.3.4 states that thermal fuses "... open at elevated temperatures caused by run-away current. They are a fail-safe measure since the battery will become inoperative once the fuse has opened. These fuses are recommended, if absolute termination of current is needed for safety concerns only."

Dave