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US 12,695,142 B2Granted
Seal assembly for a battery cell
AssigneeDuracell U.S. Operations, Inc.
InventorsMark T. Ashbolt, Daniel G. Allen, Oleg Podoprigora
Life of this patent
Estimating the term…
Abstract
A seal assembly for a battery cell includes a grommet having an opening having an inner surface. A nail has a nail head and a stem extending from the stem. The stem includes a first portion with a larger diameter and a second portion with a smaller diameter and the stem extends through the opening in the grommet. The stem and the grommet form a first interference fit at a distal end of the opening. A trap clearance is formed between the distal end of the opening and the nail head. The trap clearance defines a trap for a sealant. A sealant is disposed on the stem and is located at least partially in the trap.
Claims20
A seal assembly for a battery cell, the seal assembly comprising:
- a grommet having an opening including an inner surface defining a bore diameter, and an inner annular ring extending inward from the inner surface, the inner annular ring having a ring diameter that is smaller than the bore diameter;
- a nail, the nail having a nail head and a stem extending from the nail head, the stem extending through the opening in the grommet, the stem and the grommet forming a first interference fit adjacent a distal end of the opening and a second interference fit between the stem and the grommet adjacent a proximal end of the grommet, a trap clearance being formed between the first interference fit and the second interference fit, and the trap clearance defining a trap for a sealant;
- and
- the sealant disposed on the stem, the sealant being located at least partially in the trap.
1 more element
A seal assembly for a battery cell, the seal assembly comprising:
- a grommet having an opening including an inner surface defining a bore diameter, and an inner annular ring extending inward from the inner surface, the inner annular ring having a ring diameter that is smaller than the bore diameter;
- a nail, the nail having a nail head and a stem extending from the nail head, the stem extending through the opening in the grommet, the stem and the grommet forming a first interference fit adjacent a distal end of the opening and a trap clearance between the distal end of the opening and the nail head, and the trap clearance defining a trap for a sealant;
- and
- the sealant disposed on the stem, the sealant being located at least partially in the trap,
- wherein the stem includes an annular recess, and wherein the trap clearance is formed by the annular recess.
2 more elements
A battery cell comprising:
- a housing, including:
- a first cover at a first housing end and a second cover at a second housing end, and an anode and a cathode disposed within the housing;
- and
- a seal assembly proximate the first cover, the seal assembly including:
- a grommet having an opening including an inner surface defining a bore diameter, and an inner annular ring extending inward from the inner surface, the inner annular ring having a ring diameter that is smaller than the bore diameter;
- a nail, the nail having a nail head and a stem extending from the nail head, the stem extending through the opening in the grommet, the stem and the grommet forming a first interference fit adjacent a distal end of the opening and a second interference fit between the stem and the grommet adjacent a proximal end of the grommet, a trap clearance being formed between the first interference fit and the second interference fit, and the trap clearance defining a trap for a sealant;
- and
- the sealant disposed on the stem, the sealant being located at least partially in the trap.
5 more elements
A battery cell comprising:
- a housing, including:
- a first cover at a first housing end and a second cover at a second housing end, and an anode and a cathode disposed within the housing;
- and
- a seal assembly proximate the first cover, the seal assembly including:
- a grommet having an opening including a distal end, a proximal end, and a bore having an inner surface between the distal end and the proximal end, an internal annular ring positioned proximate the distal end, the internal annular ring having a ring diameter, the bore having a bore diameter, and a headspace located at the proximal end, the headspace having a headspace diameter, the ring diameter being smaller than the bore diameter and the headspace diameter, and the bore diameter being smaller than the headspace diameter;
- a nail, the nail having a nail head and a stem extending from the nail head, the stem including a first portion with a first stem diameter and a second portion with a second stem diameter, the first stem diameter being larger than the second stem diameter, the stem extending through the opening in the grommet, the stem and the grommet forming a first interference fit between the second portion of the stem and the ring diameter and a second interference fit between the stem and the grommet adjacent the proximal end of the grommet, the stem and the grommet forming a trap clearance between the first interference fit and the second interference fit, the trap clearance defining a trap for a sealant;
- and
- the sealant disposed on the stem, the sealant being located at least partially in the trap.
5 more elements
Dependencies are inferred from the claim text.