Housings for Battery Cut-Offs

In some vehicles, the battery is not located in the engine compartment, but rather in the rear of the vehicle near the fuel tank. In the event of a crash, the flow of current from the battery must be stopped immediately to prevent the fuel in the fuel tank from igniting. This can be achieved with a “cut-off” system, which isolates two contacts from one another with the ignition of a small charge.

The operating principle employed in battery cut-off systems is similar to that used in airbag ignitors.