Rolled single cell and bi-cell electrochemical devices and method of manufacturing the same

• US 5,597,658 A
• Filed: 02/28/1995
• Issued: 01/28/1997
• Est. Priority Date: 02/28/1995
• Status: Expired due to Fees

• Current Assignee: Lithium Battery, LLC
• Original Assignee: Lithium Technologies Incorporated (Khoros LLC)
• Inventors: Kejha, Joseph B.
• Primary Examiner(s): KALAFUT, STEPHEN J
• Application Number:
  US08/395,717
• Time in Patent Office: 700 Days
• Field of Search: 429/99, 429/189, 429/190, 427/393.3, 427/394, 427/412, 427/121, 29/623.5
• US Class Current: 429/94
• CPC Class Codes: H01G 9/00 Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
• CPC Class Codes: H01G 9/15 Solid electrolytic capacitors H01G11/00 takes precedence
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 10/0566 Liquid materials
• CPC Class Codes: H01M 2300/0082 Organic polymers
• CPC Class Codes: H01M 6/181 with polymeric electrolytes
• CPC Class Codes: H01M 6/40 Printed batteries , e.g. thin film batteries
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y10T 29/49115 including coating or impregnating

Abstract

Rolled single cell and bi-cell electrochemical devices and method of manufacturing, wherein the anode, cathode and composite electrolyte layers are separately fed and simultaneously rolled while the composite polymer electrolyte layer is wet or semi-solid, and may be possibly solidified later.

Claims

1. A rolled cell electrochemical device which comprises:

at least one cathode layer,

at least one composite polymer electrolyte layer in contact with said cathode layer,

an anode layer in contact with said composite polymer electrolyte layer,

said cell has positive and negative terminals thereon, and

wherein said electrolyte is wet or semi-solid during rolling and may be solidified after rolling.

2. A device as defined in claim 1 in which

a separator layer is provided in contact with said anode layer.

3. A device as defined in claim 2 in which

said separator layer is in adhesive contact with said anode layer.

4. A device as defined in claim 1 in which

a moisture proof plastic coated heat sealable metal foil bag is provided surrounding said rolled electrochemical device.

5. A device as defined in claim 4 in which

a hard case is provided enclosing said bag.

6. A method of manufacturing rolled cell electrochemical devices which comprises

providing a core about which said device is to be formed,

providing at least one supply of cathode layer material,

providing at least one supply of electrolyte layer web material,

providing at least one supply of anode layer material,

providing a supply of liquid polymer electrolyte,

impregnating and coating said electrolyte web material with said liquid polymer electrolyte to provide a composite polymer electrolyte layer,

placing said composite polymer electrolyte layer between said cathode and said anode layers,

feeding said layers separately, and

simultaneously rolling said layers about said core while said electrolyte is wet or semi-solid to form a rolled electrochemical device.

7. A method as defined in claim 6 in which

said electrolyte is solidified after rolling.

8. A bi-polar cell formed in accordance with the method defined in claim 6.

9. A capacitor formed in accordance with the method defined in claim 6.

10. A fuel cell formed in accordance with the method defined in claim 6.