BATTERY CELL HEAT EXCHANGER WITH GRADED HEAT TRANSFER SURFACE
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United States of America Patent
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Issued Date -
Feb 4, 2016
app pub date -
Jul 30, 2015
filing date -
Jul 31, 2014
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Abstract
A battery cell heat exchanger formed by a pair of mating plates that together form an internal tubular flow passage. The tubular flow passage is generally in the form of a serpentine flow passage extending between an inlet end and an outlet end and having generally parallel flow passage portions interconnected by generally U-shaped flow passage portions. The flow passage provides a graded heat transfer surface within each generally parallel flow passage portion and/or a variable channel width associated with each flow passage portion to provide improved temperature uniformity across the surface of the heat exchanger. The graded heat transfer surface may be in the form of progressively increasing the surface area associated with the individual flow passage portions with heat transfer enhancement features or surfaces arranged within the flow passage portions. The channel width and/or height may also be varied so as to progressively decrease for each flow passage portion.
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