Electrochemical cell

Patent metadata

Field	Value
Publication number	US-10522811-B2
Application number	US-201314090455-A
Country	US
Kind code	B2
Filing date	Nov 26, 2013
Priority date	Nov 29, 2012
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

The present invention relates to an electrochemical cell, comprising:
an anode in contact with an anode current collector, a cathode in contact with a cathode current collector, a separator disposed between the anode and the cathode, wherein the anode is disposed between the separator and the anode current collector and wherein the cathode is disposed between the separator and the cathode current collector, wherein the anode current collector and the cathode current collector form an encapsulating housing for the assembly of anode, cathode and separator.

First claim

What is claimed is:

1. An electrochemical cell, comprising:
an anode in contact with an anode current collector;
a cathode in contact with a cathode current collector;
a separator disposed between the anode and the cathode;
an encapsulating housing consisting of the anode current collector, the cathode current collector, and a seal extending between the outer edges of the anode current collector and the cathode current collector; and
an anode connector tab and a cathode connector tab, wherein at least one of the anode connector tab and the cathode connector tab is integrally formed with the anode current collector or with the cathode current collector, respectively,
wherein the encapsulating housing encapsulates the anode, the cathode, and the separator,
wherein the anode is disposed between the separator and the anode current collector and wherein the cathode is disposed between the separator and the cathode current collector,
wherein at least one of the anode current collector and the cathode current collector has a thickness of less than 25 μm and comprises an amorphous metallic material, and
wherein the amorphous metallic material comprises a Ni alloy comprising, based on a total weight of the alloy:
71-92 wt.-% Ni;
7-19 wt.-% Cr;
4.5-7.5 wt.-% Si;
4-5 wt.-% Fe,
1.4-4.0 wt.-% B; and
less than 0.1 wt.-% C.

2. The electrochemical cell according to claim 1 , further comprising:
an electrolyte, which fills pores of the anode, of the cathode, and of the separator.

3. The electrochemical cell according to claim 1 , wherein the at least one of the anode current collector and the cathode current collector at least partially consists of the amorphous metallic material.

4. The electrochemical cell according to claim 1 , wherein the at least one of the anode current collector and the cathode current collector has a thickness of less than 15 μm.

5. The electrochemical cell according to claim 1 , wherein at least one of the anode current collector and the cathode current collector is elastically deformable up to a curvature radius equal to 10 mm.

6. The electrochemical cell according to claim 5 , wherein at least one of the anode current collector and the cathode current collector is substantially kink-free bendable up to a bending radius smaller than or equal to 20 mm.

7. The electrochemical cell according to claim 1 , wherein the separator comprises an outer edge extending beyond an outer edge of the anode and/or cathode to engage with the seal and/or with at least one of anode current collector and cathode current collector.

8. The electrochemical cell according to claim 1 , being designed as a primary or secondary battery.

9. The electrochemical cell according to claim 1 , wherein the seal comprises an electrically insulating material such that the cathode current collector and the anode current collector are electrically separated.

10. The electrochemical cell according to claim 1 , wherein the seal comprises a polyvinyl acetate adhesive.

11. An electrochemical cell, comprising:
an anode in contact with an anode current collector;
a cathode in contact with a cathode current collector;
a separator disposed between the anode and the cathode; and
an encapsulating housing consisting of the anode current collector, the cathode current collector, and a seal extending between the outer edges of the anode current collector and the cathode current collector,
wherein the encapsulating housing encapsulates the anode, the cathode, and the separator,
wherein the anode is disposed between the separator and the anode current collector and wherein the cathode is disposed between the separator and the cathode current collector,
wherein at least one of the anode current collector and the cathode current collector has a thickness of less than 25 μm and comprises an amorphous metallic material,
wherein at least one of the anode current collector and the cathode current collector is elastically deformable up to a curvature radius equal to 10 mm, and
wherein the amorphous metallic material comprises a Ni alloy comprising, based on a total weight of the alloy:
71-92 wt.-% Ni;
7-19 wt.-% Cr;
4.5-7.5 wt.-% Si;
4-5 wt.-% Fe;
1.4-4.0 wt.-% B; and
less than 0.1 wt.-% C.

12. The electrochemical cell according to claim 1 , wherein the anode current collector has a thickness of less than 25 μm and comprises the amorphous metallic material.

13. The electrochemical cell according to claim 1 , wherein the cathode current collector has a thickness of less than 25 μm and comprises the amorphous metallic material.

Assignees

• Swatch Group Res & Dev Ltd

Inventors

• Stalder Michael
• Zuellig Fredy
• Heck Pascal
• Sohi Kurosh
• Leterrier Yves
• Moll Jericho Lynn
• Leran Jean-Baptiste
• Manson Jan-Anders

Classifications

• H01M4/76

  Containers for holding the active material, e.g. tubes, capsules · CPC title

• H01M4/666

  in the form of mixed materials (H01M4/668 takes precedence) · CPC title

• H01M6/40

  Printed batteries {, e.g. thin film batteries} · CPC title

• H01M4/661 Primary

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

• H01M10/0436

  Small-sized flat cells or batteries for portable equipment · CPC title