04-02-2022, 12:39 PM
I have recently been re-building NiCd and NIMh battery packs for various pieces of equipment.
I have taken to including a resettable "Polyfuse" in each pack.
The ones I favour currently are the Bourns MF-R090. These are rated at 60V and 0.9A. RS part number 6478538
I found some of these in packs I was re-building.
They sit pretending to be a short until they heat up on overcurrent and open. As soon as they cool down they reset - quite fast.
They hold happily at 0.9A but trip at 1.8A. More than adequate protection from shorts on the output of the battery pack.
So charging or discharging currents of up to an amp are fine.
at about 32p each, a fine investment.
-Jeremy
I have taken to including a resettable "Polyfuse" in each pack.
The ones I favour currently are the Bourns MF-R090. These are rated at 60V and 0.9A. RS part number 6478538
I found some of these in packs I was re-building.
They sit pretending to be a short until they heat up on overcurrent and open. As soon as they cool down they reset - quite fast.
They hold happily at 0.9A but trip at 1.8A. More than adequate protection from shorts on the output of the battery pack.
So charging or discharging currents of up to an amp are fine.
at about 32p each, a fine investment.
-Jeremy
Jeremy. G8MLK. BVWS Chairman. British Vintage Wireless and TV Museum Friend.
Pamphonic Website ______________ BTTT OB Truck Restoration
Pamphonic Website ______________ BTTT OB Truck Restoration
