Bipolar electrode for batteries
AssigneeSorapec S.A.
InventorsGuy Bronoel, Bernard Bugnet, Noelle Tassin
Life of this patent
Estimating the term…
Abstract
Bipolar electrode is provided with a conductive support/separator perforated on a part which is free from active material with at least one opening which communicates by a gaseous environment in a battery between elements assembled in series. The opening prevents the passage of electrolyte from one conductive support/separator to another, and may include an advantageously hydrophobic material, which also contains an opening therethrough, and is arranged on at least one side of the opening. The bipolar electrodes are particularly applicable to sealed batteries.
Claims27
A bipolar electrode for a battery, comprising:
- a conductive separator comprising a support including at least two portions;
- an active material on one of said two portions, and the other of said two portions being free from active material;
- and
- means defining at least one opening in said other of said two portions for permitting ambient gas to pass therethrough and preventing passage of electrolyte.
A battery, comprising:
- a plurality of bipolar electrodes, each of said plurality of bipolar electrodes comprising:
- a conductive separator comprising a support including at least two portions;
- an active material on one of said two portions, and the other of said two portions being free from active material;
- and
- means defining at least one opening in said other of said two portions for permitting ambient gas to pass therethrough and preventing passage of electrolyte between said plurality of bipolar electrodes.
A method of manufacturing a bipolar electrode comprising a conductive separator comprising a support including at least two portions;
- an active material on one of the two portions, and the other of the two portions being free from active material;
- and means defining at least one opening in the other of the two portions for permitting ambient gas to pass therethrough and preventing passage of electrolyte, the method comprising:
- forming at least one open area in the other of the two portions;
- force fitting a cylinder into the at least one open area, the cylinder having a center axis, two faces and a central portion between the two faces;
- forming a hole substantially through the center axis of the cylinder;
- positioning a wire in the hole;
- squashing the cylinder on the two faces while maintaining the central portion;
- and
- withdrawing the wire.
A method of manufacturing a bipolar electrode comprising a conductive separator comprising a support including at least two portions;
- an active material on one of the two portions, and the other of the two portions being free from active material;
- and means defining at least one opening in the other of the two portions for permitting ambient gas to pass therethrough and preventing passage of electrolyte, the method comprising:
- forming at least one open area in the other of the two portions;
- and
- adhering a disk comprising a central opening having a diameter which is equal to or slightly greater than a diameter of the at least one open area onto at least one side of the support so that the central opening of the disk is associated with the at least one open area.
Dependencies are inferred from the claim text.