LIFEPO4 Battery discussion thread

denmendez65 said:
Big boy stuff I guess.

Mine are 11 rand 🤣 .

But you may go over 10 years and the fuse never operates. Its once off.
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There are cheaper brands but not sure about reliablility:
1779269316982.png

Yeah, you should never have to replace a fuse.
 
I am not going to be splitting hairs but when I looked at megafuses price (58v and higher) I went with normal T class fuse and disconnect. I was reading that mega fuses does not have the ratted capacity to break shorted lithium battery bank?
 
DTBA said:
I am not going to be splitting hairs but when I looked at megafuses price (58v and higher) I went with normal T class fuse and disconnect. I was reading that mega fuses does not have the ratted capacity to break shorted lithium battery bank?
Click to expand...
A fuse is just a piece of wire, really, that melts under enough current. I wonder what they meant when they said it doesn't have the rated capacity to break the current of a shorted battery?

That terminology is typically used with breakers and isolators.
 
denmendez65 said:
A fuse is just a piece of wire, really, that melts under enough current. I wonder what they meant when they said it doesn't have the rated capacity to break the current of a shorted battery?

That terminology is typically used with breakers and isolators.
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Probably that is doesnt break but welds together?
1779271914602.png
1779272087923.png
 
DTBA said:
I am not going to be splitting hairs but when I looked at megafuses price (58v and higher) I went with normal T class fuse and disconnect. I was reading that mega fuses does not have the ratted capacity to break shorted lithium battery bank?
Click to expand...
Should we be worried about cheap?
1779272049127.png
 
wingnut771 said:
Probably that is doesnt break but welds together?
View attachment 1909397
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I am trying to think of it practically. The fuse is rated to break at any current higher than its rating.

It also has a voltage rating at which it can safely break the current without a big energy release. If rated at 58V, for example or higher, under an internal short in one of the batteries, the voltage will get pulled down drastically, not go up.

So the voltage rating is met, and the current requirements are met.

Maybe I am missing something else.
 
denmendez65 said:
I am trying to think of it practically. The fuse is rated to break at any current higher than its rating.

It also has a voltage rating at which it can safely break the current without a big energy release. If rated at 58V, for example or higher, under an internal short in one of the batteries, the voltage will get pulled down drastically, not go up.

So the voltage rating is met, and the current requirements are met.

Maybe I am missing something else.
Click to expand...
was reading this
 
denmendez65 said:
I am trying to think of it practically. The fuse is rated to break at any current higher than its rating.

It also has a voltage rating at which it can safely break the current without a big energy release. If rated at 58V, for example or higher, under an internal short in one of the batteries, the voltage will get pulled down drastically, not go up.

So the voltage rating is met, and the current requirements are met.

Maybe I am missing something else.
Click to expand...
🤷‍♂️
 
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