Current collector design to reduce granule bed disruption

Patent metadata

Field	Value
Publication number	US-9786956-B2
Application number	US-201514718146-A
Country	US
Kind code	B2
Filing date	May 21, 2015
Priority date	May 21, 2015
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

Apparatus and methods to reduce granule disruption during manufacture of electrochemical cells, such as a metal halide electrochemical cell, are provided. In one embodiment, a current collector can include a diffuser strip extending beneath an aperture configured to receive an injection stream of molten electrolyte. The diffuser strip can be configured to dissipate an injection stream of molten electrolyte when the molten electrolyte is injected into an electrochemical cell. In this way, disruption of a granule bed by the injection of the molten electrolyte during manufacture of the electrochemical cell can be reduced.

First claim

What is claimed is:

1. A current collector for an electrochemical cell, the current collector comprising:
a cap having an aperture, the aperture configured to receive an injection stream of molten electrolyte;
a first surface extending from the cap, the first surface comprising a first leg of a U-shaped conductor;
a second surface extending from the cap, the second surface separated from the first surface by a distance, the second surface comprising a second leg of the U-shaped conductor;
a diffuser strip extending between the first leg and the second leg, the diffuser strip extending beneath the aperture configured to receive an injection stream of molten electrolyte; and
a wicking material disposed between the first leg and the second leg such that the diffuser strip is positioned between the wicking material and the cap.

2. The current collector of claim 1 , wherein the diffuser strip is configured to dissipate an injection stream of molten electrolyte received in the aperture.

3. The current collector of claim 1 , wherein the diffuser strip has a width that is greater than a size of the aperture.

4. The current collector of claim 1 , wherein the diffuser strip is spaced a distance beneath aperture in the range of 0.5 cm to 4.0 cm.

Assignees

• Gen Electric

Inventors

• Sudworth Paul
• Maruszak Grzegorz

Classifications

• H01M10/399 Primary

  Cells with molten salts · CPC title

• H01M4/661

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title

• H01M4/78

  Shapes other than plane or cylindrical, e.g. helical · CPC title

• H01M2300/0048

  Molten electrolytes used at high temperature · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title