VVith the advent of 42 V PowerNet, new technologies have been developed, including batteries, alternators and fuses. The rules of circuit protection have changed in 42 V PowerNet automotive applications. Due to introduction of more powerful batteries and alternators, the short circuit current fuses will encounter will be 4 times greater than today. Single piece, zinc fuses cannot withstand this voltage or the very high short circuit currents. Consequently, a new line of cost-effective fuses for the 42 V PowerNet (ranging from 500 mA to 350 A) has been developed. The foundation of this solution is the proven, multi-material technology for blade fuses which has been used for over twenty years in OEM applications worldwide. With only internal modifications to the melting element, these high voltage blade fuses are in the same footprint as today's standard fuses. However, to prevent interchange with low-voltage fuses, a foolproof coding mechanism has been integrated into the blade fuse to ensure there is no possibilty of consumer mix up. This mechanism should be discussed in upcoming standardization efforts. By subjecting blade fuses (of a multi-material construction) and bolt-on fuses (with ultrasonically welded bodies) to short circuit tests with Johnson Controls INSPIRA batteries and standard lead acid batteries, the authors quantify the following fuse characteristics essential to clear possible 4000 A short circuits of advanced lead acid batteries in the 42 V PowerNet: Multi-Material Construction, Fiberglass Reinforced Thermoplastic Housing, Ultrasonic Welded Housing (for Bolt-On fuses) and a Mechanical Safety Rejection Coding. These features, combined with PUDENZ's industry certified quality production process, will allow OEM's worldwide cost-effective and highly functional circuit protection solutions for 42 V PowerNet vehicles.
Circuit protection solutions for 42V automotive electrical architectures
Lösungen für den Schaltungsschutz bei 42 V Batteriespannung im PKW
2000
5 Seiten, 10 Bilder, 6 Quellen
Aufsatz (Konferenz)
Englisch
Circuit protection solutions for 42 V automotive electrical architectures
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