Operating principle of Pyro-Fuses
When the signal is detected from the vehicle, an ignition current is generated to operate the Pyro-Fuse, shutting down the circuit and preventing electrical flow.
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- The ignition current is generated based on the ECU signal.
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- The initiator ignition operates gas emission.
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- The pressurized piston detaches the busbar, shutting down the electric circuit.
Pyro-Fuse application
Automobile application
Instant electrical shutdown is realized based on the high reliability cultivated in the Inflator field.
Daicel Safety Strategic Business Unit(SBU)s' have developed Pyro-Fuse that enables safe, instantaneous shutdown of high-voltage electrical currents.
We provide broad application of Pyro-Fuse requirements that could be used for not only electric vehicles, but also gasoline vehicles as well.

Intentional shutdown application examples
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Circuit malfunctions
Protection from overcurrent due to short circuits and malfunctions.
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Accidents
Protection from electric shocks and fire by isolating the battery in case of car crashes.
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Overcharging
Protection from fire due to overcharging.
Industrial application
Safe electrical shutdown on a millisecond level could also be utilized in systems used for industrial power storages, heavy-duty batteries, recyclable energy storages, and electricity transmissions.

Intentional shutdown application examples
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Short circuits
Shutting down emergency overcurrent.
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Overcharging
Controlling battery charging to prevent overcharge.