BATTERY ELECTRODE STRUCTURE

• US 20090142659A1
• Filed: 10/23/2008
• Published: 06/04/2009
• Est. Priority Date: 11/30/2007
• Status: Abandoned Application

• Current Assignee: BYD Company Limited
• Original Assignee: BYD Company Limited
• Inventors: SHEN, XI, LAI, QING, ZHU, JIANHUA
• Application Number:
  US12/256,769
• Publication Number:
  US 20090142659A1
• Time in Patent Office: Days
• US Class Current: 429/163
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 50/536 characterised by the method of fixing the leads to the electrodes, e.g. by welding
• CPC Class Codes: H01M 50/54 Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
• 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

Abstract

An electrode structure for a battery having an electrode tab coupled to a recess within an electrode lead. The tab can be coupled to the recess via hot-pressure treatment or mechanical compression. The coupling can be further reinforced by known welding techniques. The resulting electrode structure is capable of providing a battery with lowered internal resistance, enhanced safety and electrical properties.

Claims

1. An electrode structure for a battery comprising:

at least one electrode tab;

an electrode lead having a recess, the recess adaptable to receive the electrode tab; and

a pressurized means configured to couple the electrode tab to the recess.

2. The structure of claim 1, wherein the pressurized means includes hot-pressure treatment, high pressure treatment and mechanical compression.

3. The structure of claim 1, wherein the depth of the electrode tab received within the recess is about 5 to 95% of the length of the recess.

4. The structure of claim 1, further comprising a bonding means for securing the electrode tab to the recess of the electrode lead.

5. The structure of claim 4, wherein the bonding means includes laser welding, ultrasonic welding and electron-beam welding.

6. A lithium-ion battery comprising:

an electrolytic solution;

a cell core having cathode, anode and separator films;

a battery shell configure to house the electrolytic solution and the cell core; and

two electrode structures disposed within the battery shell, each electrode structure having;

at least one electrode tab;

an electrode lead having a recess, the recess adaptable to receive the electrode tab; and

a pressurized means configured to couple the electrode tab to the recess.

7. The battery of claim 6, wherein the pressurized means includes hot-pressure treatment, high pressure treatment and mechanical compression.

8. The battery of claim 6, wherein the depth of the electrode tab received within the recess is about 5 to 95% of the length of the recess.

9. The battery of claim 6, wherein the cathode, separator and anode films of the cell core are configured in a cascading arrangement, and wherein the cathode and anode films are each coupled to the at least one electrode tab.

10. The battery of claim 6, further comprising a bonding means for securing the electrode tab to the recess of the electrode lead.

11. The battery of claim 10, wherein the bonding means includes laser welding, ultrasonic welding and electron-beam welding.

12. An electrode structure for a battery comprising:

at least one electrode tab;

an electrode lead having a recess, the recess adaptable to receive the electrode tab;

a pressurized means configured to couple the electrode tab to the recess; and

a bonding means for securing the electrode tab to the recess of the electrode lead.

13. The structure of claim 12, wherein the pressurized means includes hot-pressure treatment, high pressure treatment and mechanical compression.

14. The structure of claim 12, wherein the depth of the electrode tab received within the recess is about 5 to 95% of the length of the recess.

15. The structure of claim 12, wherein the bonding means includes laser welding, ultrasonic welding and electron-beam welding.