# US 2014/0193698 A1 · Electrochemical cell, cell case and method for making same

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- Number: US 2014/0193698 A1
- Document ID: US20140193698A1
- Status: Published application
- Kind: A1
- Application number: 13/735,309
- Filed: 2013-01-07
- Published: 2014-07-10
- Earliest claimed: 2013-01-07
- Assignees: General Electric Company
- Applicants: General Electric Company
- Inventors: Jinghua Liu, I; Huiqing Wu; Michael Alan Vallance; David Charles Bogdan, JR.
- Web page: https://patentgrep.com/patent/US20140193698A1

## CPC

- H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes}
- H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence)
- H01M 50/529: Intercell connections through partitions, e.g. in a battery casing
- H01M 10/0422: {Cells or battery with cylindrical casing}
- H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence)
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- Y10T 29/49108: Electric battery cell making
- Y10T 29/4911: including sealing
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An electrochemical cell comprises a negative electrode, an positive electrode, a cell case, and a solid electrolyte. The cell case comprises an outer case and an inner case. The solid electrolyte defines a first chamber to receive the negative electrode and is disposed within the inner case to define a second chamber. The second chamber is separated from and is in ionic communication with the first chamber to receive the positive electrode. The electrochemical cell further comprises a first current collector extending into the first chamber. Wherein an open upper end of the inner case extends beyond an open upper end of the outer case. A cell case and a method for making an electrochemical cell are also presented.

## Claims

### Claim 1

An electrochemical cell, comprising:
a negative electrode;
a positive electrode;
a cell case comprising an inner case and an outer case receiving the inner case;
a solid electrolyte defining a first chamber to receive the negative electrode and disposed within the inner case of the cell case to define a second chamber therebetween, and wherein the second chamber is separated from and in ionic communication with the first chamber to receive the positive electrode;
a first current collector extending into the first chamber; and
wherein an open upper end of the inner case extends beyond an open upper end of the outer case.

### Claim 2 (depends on 1)

The electrochemical cell of claim 1, wherein the inner case is detachably disposed on the outer case.

### Claim 3 (depends on 1)

The electrochemical cell of claim 1, wherein the inner case comprises a body section and a collar section disposed around and extending beyond an open upper end of the body section.

### Claim 4 (depends on 3)

The electrochemical cell of claim 3, further comprising a cover mating with the collar section of the inner case to seal the cell case, and wherein the outer case is distal from the cover.

### Claim 5 (depends on 3)

The electrochemical cell of claim 3, wherein a thickness of the collar section is greater than a thickness of the body section, and wherein the thickness of the body section is in a range of from about 0.05 mm to about 0.65 mm.

### Claim 6 (depends on 1)

The electrochemical cell of claim 1, wherein a thickness of the outer case is greater than a thickness of the inner case.

### Claim 7 (depends on 1)

The electrochemical cell of claim 1, wherein the cell case acts as a second current collector, wherein the inner case comprises one of nickel, molybdenum, and combinations thereof.

### Claim 8 (depends on 7)

The electrochemical cell of claim 7, wherein the outer case comprises different materials from the materials of the inner case, and wherein the outer case comprises one of mild steel, stainless steel, galvanized steel, non-ferrous alloys.

### Claim 9 (depends on 1)

The electrochemical cell of claim 1, wherein each of the outer case, inner case and the solid electrolyte has a tube-like shape.

### Claim 10 (depends on 1)

The electrochemical cell of claim 1, wherein the negative electrode comprises alkaline metal and the positive electrode comprises one of sulphur and transition metal chloride.

### Claim 11

A cell case of an electrochemical cell, comprising:
an outer case having an open upper end; and
an inner case disposed within the outer case, and the inner case having an open upper end extending beyond the open upper end of the outer case.

### Claim 12 (depends on 11)

The cell case of claim 11, wherein the inner case is detachably disposed on the outer case.

### Claim 13 (depends on 11)

The cell case of claim 11, wherein the inner case comprises a body section and a collar section disposed around and extending beyond an open upper end of the body section.

### Claim 14 (depends on 13)

The cell case of claim 13, wherein a thickness of the collar section is greater than a thickness of the body section, and wherein the thickness of the body section is in a range of from about 0.05 mm to about 0.65 mm.

### Claim 15 (depends on 11)

The cell case of claim 11, wherein the cell case comprises electrically conductive materials, wherein the inner case comprises one of nickel, molybdenum, and combinations thereof, and wherein the outer case comprises different materials from the inner case.

### Claim 16

A method for making an electrochemical cell, comprising:
introducing a negative electrode into a first chamber defined by a solid electrolyte of an electrochemical cell;
introducing a positive electrode into a second chamber defined between the solid electrolyte and an inner case of a cell case of the electrochemical cell, and separated from and in ionic communication with the first chamber;
extending a first current collector into the first chamber; and
wherein the cell case further comprises an outer case receiving the inner case, and wherein an open upper end of the inner case extends beyond an open upper end of the outer case.

### Claim 17 (depends on 16)

The method of claim 16, wherein the inner case is detachably disposed on the outer case.

### Claim 18 (depends on 16)

The method of claim 16, wherein the inner case comprises a body section and a collar section disposed around and extending beyond an open upper end of the body section, and wherein the body section is fabricated using a drawing technique.

### Claim 19 (depends on 18)

The method of claim 18, further comprising assembling a cover onto the collar section of the inner case to seal the cell case, wherein a thickness of the collar section is greater than a thickness of the body section, and wherein the outer case is distal from the cover.

### Claim 20 (depends on 16)

The method of claim 16, wherein the inner case comprises a body section and a collar section, and wherein the method further comprises providing a planar sheet of the body section and an annular collar section disposed around and extending beyond sides of the body section to fabricate the inner case having a tube-like shape.