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Current-interrupt device for battery cell

  • US 10,461,291 B2
  • Filed: 12/12/2017
  • Issued: 10/29/2019
  • Est. Priority Date: 12/12/2017
  • Status: Active Grant
First Claim
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1. A current-interrupt device for a battery cell, the current-interrupt comprising:

  • a plate defining a hole;

    a diaphragm joined to the plate and covering a top of the hole;

    a cover sealing a bottom of the hole; and

    a dielectric fluid disposed in the hole, wherein, the diaphragm and the cover are movable, responsive to cell pressure exceeding a threshold, separating the diaphragm from the plate forming a gap therebetween and releasing the fluid into the gap, and preventing current from arching across the gap.

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