eXodus
Solar Addict
- Joined
- Jul 27, 2020
- Messages
- 1,482
This is danger zone - so here it goes:
After watching a few Tesla Teardowns I realized - they don't have fuses anymore in most places.
They call it virtual circuit breaker or e-fuse - a piece of software monitors the current and shuts down the power when it exceeds are certain threshold.
Most modern BMS do that already. When Tesla got approval to put this in a production vehicle - why are we still dealing with fuses? (at least the large one after the battery)
My inverter shuts down the output when I overload it - when I put a 2500w load on my 1500w inverter it shuts down within a second. There is never a danger for the wiring.
What steps would we need to take to use the BMS as a e-fuse:
1. We need to size the wire to rating of the BMS - if you got a 100A BMS - the wire needs to be able to take at least 125A
2. The device (inverter) connected to the battery current must be able to handle that current.
3. ??
I know the BMS could fail and not shut down - but the same is true for a fuse or breaker.
Thoughts, opinions?
After watching a few Tesla Teardowns I realized - they don't have fuses anymore in most places.
They call it virtual circuit breaker or e-fuse - a piece of software monitors the current and shuts down the power when it exceeds are certain threshold.
Most modern BMS do that already. When Tesla got approval to put this in a production vehicle - why are we still dealing with fuses? (at least the large one after the battery)
My inverter shuts down the output when I overload it - when I put a 2500w load on my 1500w inverter it shuts down within a second. There is never a danger for the wiring.
What steps would we need to take to use the BMS as a e-fuse:
1. We need to size the wire to rating of the BMS - if you got a 100A BMS - the wire needs to be able to take at least 125A
2. The device (inverter) connected to the battery current must be able to handle that current.
3. ??
I know the BMS could fail and not shut down - but the same is true for a fuse or breaker.
Thoughts, opinions?