Thin profile battery

• US 5,652,070 A
• Filed: 01/18/1996
• Issued: 07/29/1997
• Est. Priority Date: 03/02/1994
• Status: Expired due to Term

• Current Assignee: Round Rock Research LLC
• Original Assignee: Micron Communications, Inc. (Micron Technology, Inc.)
• Inventors: Tuttle, Mark E., Blonsky, Peter M.
• Primary Examiner(s): Maples, John S.
• Application Number:
  US08/588,559
• Time in Patent Office: 558 Days
• Field of Search: 429/127, 429/162, 429/185, 429/166, 429/171
• US Class Current: 429/162
• CPC Class Codes: H01M 50/109 of button or coin shape
• CPC Class Codes: H01M 50/184 characterised by their shape or structure
• CPC Class Codes: H01M 50/186 characterised by the disposition of the sealing members
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A button-type battery has an anode, a cathode, and an electrolyte encased with two terminal housing members. The terminal housing members have respective peripheries that are crimped together to form a fluid-tight seal. An insulating gasket is provided between the peripheries to electrically insulate the two terminal housing members. A porous separator physically separates the anode and cathode and extends between the terminal housing member peripheries at least partially into the fluid-tight seal. According to one aspect, the separator overlaps the gasket in the seal. According to another aspect, the separator and gasket are formed of a single, integral piece of material. The thickness of the entire battery is less than one millimeter.

Claims

1. A thin profile battery defined by a thickness which is less than a maximum linear dimension of its anode, comprising:

an anode, and a cathode;

a conductive first terminal housing member having a periphery and being in electrical contact with one of the anode or the cathode;

a conductive second terminal housing member having a periphery and being in electrical contact with the other of the anode or the cathode;

the first and second terminal housing members forming an enclosed housing which surrounds the anode and the cathode;

the first and second terminal housing member peripheries together forming a seal;

a separator between the anode and the cathode;

the separator having a periphery that extends between the first and second terminal housing member peripheries at least partially into the seal; and

wherein a total combined thickness of the anode, the cathode, the separator, and the first and second terminal housing members is less than 1 millimeter.

2. A thin profile battery according to claim 1 wherein the total combined thickness of the anode, the cathode, the separator, and the first and second terminal housing members is approximately 0.5 millimeter or less.

3. A thin profile battery defined by a thickness which is less than a maximum linear dimension of its anode, comprising:

an anode, and a cathode;

a conductive first terminal housing member having a periphery and being in electrical contact with one of the anode or the cathode;

a conductive second terminal housing member having a periphery and being in electrical contact with the other of the anode or the cathode;

the first and second terminal housing members forming an enclosed housing which surrounds the anode and cathode;

an integral separator and gasket layer;

the integral layer having (1) a central portion positioned between the anode and cathode to physically separate the anode and the cathode and to facilitate electrolytic conductivity between the anode and the cathode, and (2) a portion peripheral to the central portion, the peripheral portion being positioned between the first and second terminal housing member peripheries;

the first and second terminal housing member peripheries and the peripheral portion of the integral separator and gasket layer being configured together to form a fluid-tight seal, the peripheral portion of the integral layer electrically insulating the first terminal housing member from the second terminal housing member; and

wherein a total combined thickness of the anode, the cathode, the central portion of the integral separator and gasket layer, and the first and second terminal housing members is less than 1 millimeter.

4. A thin profile battery according to claim 3 wherein the total combined thickness of the anode, the cathode, the central portion of the integral separator and gasket layer, and the first and second terminal housing members is approximately 0.5 millimeter or less.

5. A thin profile battery defined by a thickness which is less than a maximum linear dimension of its anode, comprising:

an anode, and a cathode;

a conductive first terminal housing member having a periphery and being in electrical contact with one of the anode or the cathode;

a conductive second terminal housing member having a periphery and being in electrical contact with the other of the anode or the cathode;

the first and second terminal housing members forming an enclosed housing which surrounds the anode and the cathode;

an insulating gasket between the first and second terminal housing member peripheries;

the first and second terminal housing member peripheries and the insulating gasket together forming a fluid-tight seal;

a separator between the anode and the cathode;

the separator having a periphery that extends between the first and second terminal housing member peripheries at least partially into the seal; and

wherein a total combined thickness of the anode, the cathode, the separator, and the first and second terminal housing members is less than 1 millimeter.

6. A thin profile battery according to claim 5 wherein the total combined thickness of the anode, the cathode, the separator, and the first and second terminal housing members is approximately 0.5 millimeter or less.

7. A thin profile battery defined by a thickness which is less than a maximum linear dimension of its anode, comprising:

an anode, and a cathode;

a conductive first terminal housing member in electrical contact with one of the anode or the cathode;

a conductive second terminal housing member in electrical contact with the other of the anode or the cathode;

the first and second terminal housing members forming an enclosed housing which surrounds the anode and the cathode;

a separator between the anode and the cathode; and

wherein a total combined thickness of the anode, the cathode, the separator, and the first and second terminal housing members is less than 1 millimeter.

8. A thin profile battery according to claim 7 wherein the total combined thickness of the anode, the cathode, the separator, and the first and second terminal housing members is less than about 0.5 millimeter.

9. A thin profile battery defined by a thickness which is less than a maximum linear dimension of its anode, comprising:

a conductive first terminal housing member having a periphery;

a conductive second terminal housing member having a periphery;

a seal comprising the first and second terminal housing member peripheries;

a separator having a periphery that extends between the first and second terminal housing member peripheries at least partially into the seal; and

wherein the thin profile battery has a total thickness of less than 1 millimeter.

10. A thin profile battery according to claim 9 wherein the thickness of the battery is approximately 0.5 millimeter or less.

11. A button-type battery having a thickness of about 0.5 millimeter or less.

12. A button-type battery having a thickness of less than 1 millimeter.

13. A thin profile battery defined by a thickness which is less than a maximum linear dimension of its anode, comprising:

a conductive first terminal housing member having a periphery;

a conductive second terminal housing member having a periphery;

an integral separator and gasket layer having peripheral portion;

a fluid-tight seal comprising the first and second terminal housing member peripheries and the peripheral portion of the integral separator and gasket layer; and

the battery having a thickness of less than 1 millimeter.

14. A thin profile battery according to claim 13 wherein the thickness of the battery is about 0.5 millimeter or less.

15. A thin profile battery defined by a thickness which is less than a maximum linear dimension of its anode, comprising:

a conductive first terminal housing member having a periphery;

a conductive second terminal housing member having a periphery;

the first and second terminal housing members forming an enclosed housing;

an insulating gasket between the first and second terminal housing member peripheries, the first and second terminal housing member peripheries and the insulating gasket together forming a fluid-tight seal;

a separator having a periphery that extends between the first and second terminal housing member peripheries at least partially into the seal; and

wherein the battery has a thickness of less than 1 millimeter.

16. A thin profile battery according to claim 15 wherein the thickness is approximately 0.5 millimeter or less.

17. A thin profile battery defined by a thickness which is less than a maximum linear dimension of its anode, comprising:

an anode, and a cathode;

a conductive first terminal housing member and a conductive second terminal housing member, the first and second terminal housing members forming an enclosed housing which surrounds the anode and the cathode;

a separator between the anode and the cathode; and

wherein a total combined thickness of the anode, the cathode, the separator, and the first and second terminal housing members is less than 1 millimeter.

18. A thin profile battery according to claim 17 wherein the total combined thickness of the anode, the cathode, the separator, and the first and second terminal housing members is less than about 0.5 millimeter.