REVERSAL DEVICE FOR LI-ION CELLL OVERCHARGE PROTECTION
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United States of America Patent
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Issued Date -
Nov 12, 2020
app pub date -
Nov 20, 2018
filing date -
Nov 20, 2017
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Abstract
A lithium-ion battery cell includes a casing, a first terminal pad having a first polarity and positioned proximate the casing, a second terminal pad having a second polarity opposite to the first polarity and positioned proximate the casing, and a reversal device formed into the casing and responsive to an increase in internal pressure within the casing so as to cause a short circuit between the first terminal pad and the second terminal pad when the internal pressure reaches a threshold. The reversal device has a folded configuration and an unfolded configuration, and is configured to transition from the folded configuration to the unfolded configuration in response to an increase in the internal pressure from below the threshold to the threshold.
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