Fuse type

[sparkyjuice]

Yep your right on all counts except catastrophic failure causing batt venting....not interested in saving the board, just my skin...
Was sounding out if anyone knew of convenient resettable device maybe should have made that clearer.
Although a rapid blow semiconductor fuse might save the board just the form factor for such a fuse that I am familiar with is little big
for this application....thanks for the reply and I meant no offence !

 

[Tubbyengineer]

Yep your right on all counts except catastrophic failure causing batt venting....not interested in saving the board, just my skin...
Was sounding out if anyone knew of convenient resettable device maybe should have made that clearer.
Although a rapid blow semiconductor fuse might save the board just the form factor for such a fuse that I am familiar with is little big
for this application....thanks for the reply and I meant no offence !

No offence, Rs item code 507-144, 16v PTC Resettable fuse 3.2a trip current giving a trip current of 12.8 at 4v with a trip time of 9s reset current <8a
or Item 647-8500, 30v Ressettable PTC 1.8a trip current meaning 13.5a trip at 4v with a trip time of 5.9 and a reset current of <6.75, either of which will easily prevent damage toan AW IMR 18650 2000mah which should be good for a constant current of 24a. 507-144 costs £1.08, 647-8500 is 38p, both are wire ended pcbmountable and could be epoxied inside a case with no problem...

 

[sparkyjuice]

No offence, Rs item code 507-144, 16v PTC Resettable fuse 3.2a trip current giving a trip current of 12.8 at 4v with a trip time of 9s reset current <8a
or Item 647-8500, 30v Ressettable PTC 1.8a trip current meaning 13.5a trip at 4v with a trip time of 5.9 and a reset current of <6.75, either of which will easily prevent damage toan AW IMR 18650 2000mah which should be good for a constant current of 24a. 507-144 costs £1.08, 647-8500 is 38p, both are wire ended pcbmountable and could be epoxied inside a case with no problem...

Cheers quick trip to RS then !

 

[Tubbyengineer]

Cheers quick trip to RS then !

No problemo, PS the techy details were for other forum members so they understood why I selected fuses with such different trip ratings...