Bottom cover design for battery with reverse protection
AssigneeEveready Battery Company, Inc.
InventorsJames C. Stricker, Thomas J. Kmetich
Life of this patent
Estimating the term…
Abstract
An electrochemical cell is provided that has a negative terminal cover with a hole therein or a raised portion with notches therein to provide adequate air ingress during the coating of a non-conductive material on the raised portion of the negative terminal. The addition of the hole or notches in the negative terminal cover prevents a vacuum from forming and thereby prevents migration of the non-conductive material toward the center of the negative terminal cover. The process of making an electrochemical cell with a negative terminal cover that has a hole therein or has a raised portion with notches therein is also provided.
Claims31
An electrochemical cell comprising:
- a housing having a first end and second end;
- a first terminal at said first end of said housing;
- a second terminal at said second end of said housing, said second terminal having an exterior surface comprising a substantially flat portion and a raised portion, the uppermost part of which is insulated, and a passageway at or radially inward of said raised portion to allow air ingress to an area outside said external surface and radially inward of said raised portion when a flat structure is placed against said second terminal parallel to said substantially flat portion.
An electrochemical cell comprising:
- a housing having a first end and second end;
- a first terminal at said first end of said housing;
- and
- a second terminal at said second end of said housing, said second terminal having a substantially flat portion and a raised portion, the uppermost part of which is insulated, and air ingress means for allowing sufficient air ingress to avoid migration of a non-conductive coating toward the center of said second terminal from said raised portion during application of said non-conductive material.
An electrochemical cell comprising:
- a housing having a first end and a second end;
- a first terminal at said first end of said housing;
- and
- a second terminal at said second end of said housing, said second terminal having an exterior surface, said second terminal exterior surface having an electrically non-conductive raised portion, said raised portion having at least one air passageway therein to allow the passage of air into an area outside said cell and radially inward of said raised portion.
An electrochemical cell comprising:
- a housing having a first end and a second end;
- a first terminal at said first end of said housing;
- and
- a second terminal at said second end of said housing, said second terminal having an exterior surface, said second terminal exterior surface having an electrically insulated raised portion, said second terminal having at least one hole therein between the radial center of said second terminal and a crest of said raised portion.
Dependencies are inferred from the claim text.