公开(公告)号：US3622392A

公开(公告)日：1971-11-23

申请号：US3622392D

申请日：1968-11-01

Applicant: ESB INC

Inventor： LARSEN DUANE M ,  TERLECKE MARK J

IPC: H01M4/60 ,  H01M10/38 ,  H01M43/02

CPC classification number: H01M10/38 ,  H01M4/60

Abstract: A cell having an outward appearance similar to a conventional primary LeClanche cell but having certain internal structural features that render the cell rechargeable, including an organic depolarizer, insulating means about the portion of the carbon rod located in the cell airspace, laminated separator means about substantially the entire inner wall of the negative electrode can, laminated insulating means along the interior bottom of the negative electrode can, and a vent washer located on top of the cell sealant enabling gases formed in the cell interior to escape to the atmosphere. A one-piece plastic closure has also been developed which eliminates the need for the cell sealant and serves as an insulator about the portion of the carbon rod locatd in the airspace as well as incorporating means to vent gases from the cell, thereby eliminating the separate vent washer.

公开(公告)号：US3615860A

公开(公告)日：1971-10-26

申请号：US3615860D

申请日：1969-12-09

Applicant: ESB INC

Inventor： TERLECKE MARK J

IPC: H01M2/12 ,  H01M6/08

CPC classification number: H01M2/12 ,  H01M6/08

Abstract: A dry cell construction having a one-piece plastic closure covering the open end of the negative electrode can which contains a depolarizer mix and a current collector centrally imbedded in the depolarizer mix. The plastic closure rests on the top edge of the negative electrode can and has a tubular projection extending from the bottom thereof through which the current collector passes. The tubular projection covers the current collector throughout an airspace located above the depolarizer mix. The plastic closure contains at least one venthole extending from its top surface into contact with the airspace above the depolarizer mix and at least one groove in the top surface of the closure extending from the outer edge of the closure into contact with the airspace between the terminal cap on top of the current collector and the plastic closure. It is preferred that the plastic closure have a plurality of ventholes and grooves which are offset from each other. The cell construction of this invention is particularly adapted for rechargeable dry cells which utilize a depolarizer mix containing an azodicarbonamide depolarizer material.