5 ms·
When a fault occurs (say a battery fluid leak to the chassis) and is detected, a mechanical relay has to open to disconnect the power from the grid. That can ta
by tlb 2y ago
When a fault occurs (say a battery fluid leak to the chassis) and is detected, a mechanical relay has to open to disconnect the power from the grid. That can take 200 ms or so, which is a long time to have 400v flowing through you.
- adrian_b 2y agoOne can have in series a very fast solid-state relay (which would disconnect in some tens of microseconds at most; e.g. with IGBTs) and a mechanical relay for permanent disconnection. This would increase the cost, but by many times less than the insulated power converters used today.