fuse resistance

[miro13car]

Hi!
I am wondering what resistance would battery fuse introduce to the curcuit?
Example automotive 60A so called fusable link used in some cars which is just alloy ribbon - what kind of resistance it represent?
Does it make sense to have 3 fuses in 12 cells string?
aNYBODY ANY THOUGHTS?
MC

 

[linear]

Hi!
I am wondering what resistance would battery fuse introduce to the curcuit?
aNYBODY ANY THOUGHTS?
MC

This is what Bussmann has to say:
Fuse Resistance
In most applications, the voltage drop across the fuse due to its internal
and contact resistances is negligible. There are, however, certain critical
applications where the fuse resistance must be considered, and it is important
that the circuit designer understands the fuse characteristics in order
to select the proper fuse.

I would just solder up a fuse with 4 leads 2 heavy leads for current and 2 for sense and measure the voltage drop. If you not setup to make a test like that, I can do a quick test on say a 20AMP auto fuse at say 15-18A to give you an idea and you can scale the results for you application. You want to take the fuse holder contact and wire resistance out the loop for a good measurement.

 

[fechter]

The resistance of a 60A fusible link will be very low. Less than 1 milliohm I think.

I'm not sure about your other question. 3 fuses in series? Perhaps try to re-phrase that question.

 

[miro13car]

LifeBatt/BMI VMS board used in HPS batteries uses fuse like a shunt sensing voltage drop across it.
One VMS control 4 cells so 36V pack has 3 fuses, simply fuse every 4 cells.
That is why I was asking what resistance would atomotive fused link introduce to the cicuit?
MC