PTC current limiting header assembly

Details PTC current limiting header assembly PTC current limiting header assembly

1998-05-15

1999-11-30

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

With control means responsive to battery condition sensing...

Temperature control

429 61, 429 59, 429 7, H01M 200, H01M 1050

Patent

active

059939907

ABSTRACT:
The present invention pertains to current limiting (overcurrent protection) header assemblies which employ a Positive Temperature Coefficient (PTC) device. More particularly, this invention pertains to current limiting header assemblies which employ a PTC device and which have particular design features, specifically, a dimpled support plate and an apertured PTC plate positioned above the dimpled support plate, wherein the dimple protrudes into or through the aperture. The header assemblies are useful in battery cells, particularly in battery cells which employ a glass-to-metal, plastic-to-metal, and similar seal instead of a stacked and crimped design. The header assemblies are compact, effectively taking up only a little more thickness than would be required for just an end cap, permitting the use of more electroactive materials and thereby yielding a battery with increased energy density. The header assemblies also offer increased reliability at the higher temperatures and humidities, which is not offered by the stacked and crimped design.

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