BMV on battery that gets moved

DIY
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1

OK, this is about mounting a BMV-712 shunt to a 100ah 12v lifepo4 battery. The battery is periodically removed to be charged from mains elsewhere so the shunt needs to move with it.

Assume an in line fuse of 100a. So if I assume a linear/ohmic relationship then for a 500a/50mv shunt that’s 10mv or 1W dissipated power.

If a plate was bonded to the battery itself (say 15mm ply as a good insulator) then could the shunt be mounted to that without issue? There isn’t the space for a full blown portable battery box (it has to fit into an existing caravan battery bay).

2

The shunt body is quite sturdy, and could be mounted directly to the battery - not recommended, or as you suggest via a small ply pad. connection to the battery negative could be via a copper busbar, enhancing mechanical stability…

3

Thanks. Whilst there should be no risk of the shunt getting warm enough to be an issue to the battery, I felt the ply pad added another layer of safety.

I hadn’t thought of using a curved busbar to aid in the mechanical aspect, thanks!