Battery unit with reinforced current collector tabs and method of making a battery unit having strengthened current collector tabs

• US 5,326,653 A
• Filed: 10/29/1992
• Issued: 07/05/1994
• Est. Priority Date: 10/29/1992
• Status: Expired due to Fees

• Current Assignee: Valence Technology Incorporated (Lithium Werks B.V.)
• Original Assignee: Valence Technology Incorporated (Lithium Werks B.V.)
• Inventors: Chang, On-Kok
• Primary Examiner(s): Shah, Mukund J.
• Assistant Examiner(s): Grumbling, Matthew V.
• Application Number:
  US07/968,173
• Time in Patent Office: 614 Days
• Field of Search: 429/121, 429/123, 429/163, 429/208, 429/162, 429/181
• US Class Current: 429/162
• CPC Class Codes: H01M 50/00 Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
• CPC Class Codes: H01M 50/543 Terminals
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery unit includes a battery having an anode including an anode current collector tab, a cathode including a cathode current collector tab, and an electrolyte disposed between the anode and the cathode. The battery is sealed by packaging material such that portions of the anode current collector tab and the cathode current collector tab extend past the exterior of the packaging material. The extended portions of the anode current collector tab and the cathode current collector tab are secured to the exterior of the packaging material to reinforce the extended portions.

Claims

1. A battery unit, comprising:

a battery having an anode including an anode current collector tab, a cathode including a cathode current collector tab, and an electrolyte disposed between the anode and the cathode;

packaging material surrounding the battery to form a package having top and bottom sides, at least a portion of the anode current collector tab and at least a portion of the cathode current collector tab extending past an exterior surface of the packaging material;

the extended portions of the anode current collector tab and the cathode current collector tab being secured to the exterior surface of the packaging material on at least one of the top and bottom sides of the package.

2. The battery unit as set forth in claim 1, wherein the packaging material surrounds the battery such that the battery is sealed and is moisture-proof.

3. The battery unit as set forth in claim 1, wherein the anode current collector tab and the cathode current collector tab are secured to the exterior surface of the packaging material by an adhesive.

4. The battery unit as set forth in claim 1, wherein the anode current collector tab and the cathode current collector tab are secured to the exterior surface of the packaging material by double-sided tape.

5. The battery unit as set forth in claim 1, wherein the anode current collector tab and the cathode current collector tab are secured to the exterior surface of the packaging material on the same side of the package.

8. The battery unit as set forth in claim 1, further comprising means for forming an electrical connection attached to the anode current collector and the cathode current collector.

9. The battery unit as set forth in claim 8, wherein the electrical connection means includes an alligator clip.

6. A battery unit, comprising:

a battery having an anode including an anode current collector tab, a cathode including a cathode current collector tab, and an electrolyte disposed between the anode and the cathode;

packaging material surrounding the battery to form a package having top and bottom sides, at least a portion of the anode current collector tab and at least a portion of the cathode current collector tab extending past an exterior surface of the packaging material;

the extended portions of the anode current collector tab and the cathode current collector tab being secured to the exterior surface of the packaging material on at least one of the top and bottom sides of the package; and

cushioning means secured on sides of the package opposite from the securement of the anode current collector tab and the cathode current collector tab.

7. The battery unit as set forth in claim 6, wherein the cushioning means includes insulating tape.

10. A method of making a battery unit, comprising the steps of:

attaching together an anode including an anode current collector tab, an electrolyte, and a cathode including a cathode current collector tab, such that the electrolyte is disposed between the anode and the cathode, thereby forming a battery;

surrounding the battery with a packaging material to form a package having a top and a bottom side, at least a portion of the anode current collector tab and at least a portion of the cathode current collector tab extending past the exterior of the packaging material;

securing the anode current collector tab and the cathode current collector tab to the exterior of the packaging material on at least one of the top and bottom sides of the package.

11. The method according to claim 10, wherein the battery is surrounded by the packaging material such that the battery is sealed and moisture-proof.

12. The method according to claim 10, wherein the anode current collector tab and the cathode current collector tab are secured to the exterior of the packaging material with an adhesive.

13. The method according to claim 10, wherein the anode current collector tab and the cathode current collector tab are secured to the exterior of the packaging material with a double-side tape.

14. The method according to claim 10, wherein the anode current collector tab and the cathode current collector tab are secured to the exterior surface of the packaging material on the same side of the package.

16. The method according to claim 10, comprising the further step of attaching means for forming an electrical connection to the anode current collector tab and the cathode current collector tab.

15. A method of making a battery unit, comprising the steps of:

attaching together an anode including an anode current collector tab, an electrolyte, and a cathode including a cathode current collector tab, such that the electrolyte is disposed between the anode and the cathode, thereby forming a battery;

surrounding the battery with a packaging material to form a package having a top and a bottom side, at least a portion of the anode current collector tab and at least a portion of the cathode current collector tab extending past the exterior of the packaging material;

securing the anode current collector tab and the cathode current collector tab to the exterior of the packaging material on at least one of the top and bottom sides of the package; and

securing cushioning means on sides of the battery unit opposite from the securement of the anode current collector tab and the cathode current collector tab.