External Fuse for BMS-C1

Battery Management
1

Dear Martin,
Hi
The schematic for BMS-C1 (in KiCad) recommends using either ITV9550L5045 or Schott D6SE14-45 fuse as following:

Trigger for fuse(s) on external PCB close to positive terminal, e.g.

* Littelfuse ITV9550L5045
* Schott D6SE14-45

But, as I checked datasheets for both of these components, found their rated current is 45 Amps.

Thus, Since BMS-C1 board is designed for currents up to 100 Amps, what’s your recommended fuse for these high currents instead?

Thanks

2

You would have to use multiple of them in parallel, depending on your desired current.

Another option might be the Dexerials SFM-120 if you find a sourcing option for it.

3

Thank you for your response.

4

Hi again Martin,

As you suggested, I decided to use three ITV9550L5045 fuses in parallel. Since I haven’t designed any PCBs for high currents (up to 100 amps) before, could you please provide some key points for designing a PCB for these fuses?