I question this because I have heard of 4P 18650 charging at 1 amp (divide by 4 per cell) 3.7v get so hot you couldn't touch it. The fuse didn't blow because it didn't break the amp threshold but still got super hot. What about using Thermal fuses? They break at a certain amp AND temperature. What's your thoughts? Link below:
Thermal fuse 72C Degrees 250V 10A Thermal Cutoff
http://s.click.aliexpress.com/e/Z7YjmqN
This is a quote by Steve McMechan on YT:
I personally tested using the fuses this style (resistor) and I don't believe it offers enough protection personally. I setup a simple 4P 18650 battery holder that I'd soldered cell fuses onto (using the same ones you used that Jehu recommended), and there were 2 bad cells out of 4 in the 4P set, and I was only charging at 4v 1amp current, and within 5 minutes the 2 bad cells got so hot I could hardly touch them without burning my fingers, yet the cell fuses DID NOT BLOW (as the cells were not sucking more than 5amps to blow them). So I replaced the cell fuses with mini 10a 70C thermal fuses and that did the job perfect, protecting the pack from the bad cells when they over-heated above 70C they blew the fuses nicely (even though they were only sucking around 1amp of current). I strongly recommend needing to use thermal fuses not just the resister legs as you've used, as that's a fire hazzard as I found from my own personal testing sorry. The Thermal fuses are super cheap anyhow, and just as easy to solder in place but offer much better protection for each cell.?
What are your thought everyone?
Thermal fuse 72C Degrees 250V 10A Thermal Cutoff
http://s.click.aliexpress.com/e/Z7YjmqN
This is a quote by Steve McMechan on YT:
I personally tested using the fuses this style (resistor) and I don't believe it offers enough protection personally. I setup a simple 4P 18650 battery holder that I'd soldered cell fuses onto (using the same ones you used that Jehu recommended), and there were 2 bad cells out of 4 in the 4P set, and I was only charging at 4v 1amp current, and within 5 minutes the 2 bad cells got so hot I could hardly touch them without burning my fingers, yet the cell fuses DID NOT BLOW (as the cells were not sucking more than 5amps to blow them). So I replaced the cell fuses with mini 10a 70C thermal fuses and that did the job perfect, protecting the pack from the bad cells when they over-heated above 70C they blew the fuses nicely (even though they were only sucking around 1amp of current). I strongly recommend needing to use thermal fuses not just the resister legs as you've used, as that's a fire hazzard as I found from my own personal testing sorry. The Thermal fuses are super cheap anyhow, and just as easy to solder in place but offer much better protection for each cell.?
What are your thought everyone?