Do It Yourself
The fuse is for overcurrent protection (shorts). The ones I mentioned are specifically designed for rechargeable battery packs and all comercial packs have them. They reset themselves after the overcurrent condition is gone. They don't have anything to do with charging. You could add a thermistor to your pack but your charger would need to be setup for delta T charge termination and then you would need a 3 pin connector. Some chargers like the Maha universal chargers have a thermistor external to the pack to prevent overcharging but mainly use other voltage detection methods for termination.darkmatter said:Hey Homebrew,
Thanks for the digikey tip, I found it in a previous post but was being a numbnuts about digging through their catalog. I am interested in the fused switch you add. Is this to avoid shorting out your battery or will it possibly throw when your battery is charged and begins to get hot due to increased resistance. It says that it provides noncycling protection but I am not really sure what that is. You seem very knowledgable on the subject; what is your background? I am a High School Physics teacher so I know the electricity stuff but I have limited practical experience.
You have been extremely helpfull on this subject and I would like to extend my gratitude.
I spent 6 years as an electronics technician in the Marine Corps. I have since moved on to engineering, although industrial engineering not electrical. Then I spent too much time reading about this stuff on the internet while bored at work. It satisfies my technogeek urges and applies to bikes. What more can one ask for?