ADVANCED HIGH DURABILITY LITHIUM-ION BATTERY

• US 20120052365A1
• Filed: 08/27/2010
• Published: 03/01/2012
• Est. Priority Date: 08/27/2010
• Status: Abandoned Application

• Current Assignee: Chun-Chieh Chang
• Original Assignee: Chun-Chieh Chang
• Inventors: Chang, Chun-chieh
• Application Number:
  US12/869,968
• Publication Number:
  US 20120052365A1
• Time in Patent Office: Days
• US Class Current: 429/158
• 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 10/0585 of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
• CPC Class Codes: H01M 50/103 prismatic or rectangular H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 50/105 Pouches or flexible bags
• CPC Class Codes: H01M 50/121 Organic material
• CPC Class Codes: H01M 50/176 for prismatic or rectangular cells H01M50/181 takes precedence
• CPC Class Codes: H01M 50/178 for pouch or flexible bag cells
• CPC Class Codes: H01M 50/188 the sealing members being arranged between the lid and terminal
• CPC Class Codes: H01M 50/198 characterised by physical properties, e.g. adhesiveness or hardness
• CPC Class Codes: H01M 50/209 adapted for prismatic or rectangular cells H01M50/216 takes precedence
• CPC Class Codes: H01M 50/211 adapted for pouch cells
• CPC Class Codes: H01M 50/227 Organic material
• CPC Class Codes: H01M 50/24 adapted for protecting batteries from their environment, e.g. from corrosion thermal insulation H01M10/658
• CPC Class Codes: H01M 50/271 Lids or covers for the racks or secondary casings
• CPC Class Codes: H01M 50/296 characterised by terminals of battery packs terminals of batteries H01M50/543
• CPC Class Codes: H01M 50/51 Connection only in series
• CPC Class Codes: H01M 50/553 Terminals adapted for prismatic, pouch or rectangular cells
• CPC Class Codes: H01M 50/562 characterised by the material
• 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: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y10T 29/4911 : including sealing

Abstract

A sealing system for a Lithium-ion battery to extend the service life of the battery. The sealing system provides, in addition to an external case of the battery, at least one additional layer of hermetic sealing for cells within the external battery case. Films of various plastics, provided in a single layer or in a combination of layers, are used for assembling hermetically sealed enclosures for the cells.

Claims

1. :

A sealing system for a Lithium-ion battery, comprising

at least one Lithium-ion cell having at least one anode, at least one cathode, an anode current collecting tab connected to the at least one anode, a cathode current collecting tab connected to the at least one cathode, and an electrolyte;

an external case for containing said at least one Lithium-ion cell;

a case lid having current collecting poles, said case lid being hermetically sealed to said external case; and

an initial enclosure of plastic for enclosing each Lithium-ion cell, said initial enclosure hermetically sealing each Lithium-ion cell, with said current collecting tabs extending through said initial enclosure.

2. :

The sealing system for a Lithium-ion battery of claim 1, further comprising

a plurality of Lithium-ion cells each having said initial enclosure;

an anode common current collector connected to all of said anode current collecting tabs;

a cathode common current collector connected to all of said cathode current collecting tabs; and

a secondary enclosure of plastic hermetically sealing all of said plurality of Lithium-ion cells having said initial enclosure, with said common current collectors extending through said secondary enclosure.

3. :

(The sealing system for a Lithium-ion battery of claim 1, further comprising

a plurality of Lithium-ion cells each having said initial enclosure;

an anode common current collector connected to all of said anode current collecting tabs;

a cathode common current collector connected to all of said cathode current collecting tabs; and

a secondary enclosure of plastic hermetically sealing all of said plurality of Lithium-ion cells having said initial enclosure, with a hermetic seal of said secondary enclosure being made to said case lid.

4. :

The sealing system for a Lithium-ion battery of claim 1, 2 or 3, wherein

each enclosure of plastic is formed of a film of Polyethylene (PE), Polypropylene (PP), Polyurethane (PU), Nylon, Polyethylene terephthalate (PET), Acrylonitrile butadiene styrene (ABS), Fluorinated ethylene propylene (FEP), Polyoxymethylene (Delrin), Polyimide, Polyacrylic, Epoxy resin or a combination of the above.

5. :

The sealing system for a Lithium-ion battery of claim 1, wherein

said initial enclosure of plastic is hermetically sealed at said current collecting tabs by heat sealing or with an adhesive.

6. :

The sealing system for a Lithium-ion battery of claim 2, wherein

said initial enclosure of plastic is hermetically sealed at said current collecting tabs by heat sealing or with an adhesive; and

said secondary enclosure of plastic is hermetically sealed at said common current collectors by heat sealing or with an adhesive.

7. :

The sealing system for a Lithium-ion battery of claim 3, wherein

said initial enclosure of plastic is hermetically sealed at said current collecting tabs by heat sealing or with an adhesive; and

said secondary enclosure of plastic is hermetically sealed at said case lid by heat sealing or with an adhesive.

8. :

The sealing system for a Lithium-ion battery of claim 2, further comprising

a tertiary enclosure of plastic hermetically enclosing said secondary enclosure, with said common current collectors extending through said tertiary enclosure.

9. :

The sealing system for a Lithium-ion battery of claim 3, further comprising

a tertiary enclosure of plastic hermetically enclosing said plurality of lithium-ion cells having said initial enclosure, with said common current collectors extending through said tertiary enclosure, said tertiary enclosure being hermetically sealed inside said secondary enclosure.

10. :

The sealing system for a Lithium-ion battery of claim 1, further comprising

a plurality of Lithium-ion cells each having said initial enclosure, wherein said plurality of Lithium-ion cells having said initial enclosure are connected in series.

11. :

The sealing system for a Lithium-ion battery of claim 1, wherein

said case lid is hermetically sealed to said external case by laser welding, use of a chime seam, or use of a chime seam in combination with a filler provided in the chime seam.

12. :

The sealing system for a Lithium-ion battery of claim 1, wherein

said current collecting poles include a positive and a negative current collecting pole, and said negative current collecting pole is of Aluminum.

13. :

A method for sealing a Lithium-ion battery, comprising

providing at least one Lithium-ion cell having at least one anode, at least one cathode, an anode current collecting tab connected to the at least one anode, a cathode current collecting tab connected to the at least one cathode, and an electrolyte;

providing an external case for containing said at least one Lithium-ion cell;

providing a case lid having current collecting poles;

hermetically sealing each Lithium-ion cell in an initial enclosure of plastic, with said current collecting tabs extending out of each initial enclosure; and

placing said at least one Lithium-ion cell having said initial enclosure of plastic in said external case and hermetically sealing said case lid to said external case.

14. :

The method for sealing a Lithium-ion battery of claim 13, further comprising

providing a plurality of Lithium-ion cells each having said initial enclosure;

providing an anode common current collector connected to all of said anode current collecting tabs;

providing a cathode common current collector connected to all of said cathode current collecting tabs;

prior to placing said at least one Lithium-ion cell having said initial enclosure in said external case, hermetically sealing all of said plurality of lithium-ion cells having said initial enclosure in a secondary enclosure of plastic, with said common current collectors extending out of said secondary enclosure.

15. The method for sealing a Lithium-ion battery of claim 13, further comprising

providing a plurality of Lithium-ion cells each having said initial enclosure;

providing an anode common current collector connected to all of said anode current collecting tabs;

providing a cathode common current collector connected to all of said cathode current collecting tabs;

prior to placing said at least one Lithium-ion cell having said initial enclosure in said external case, hermetically sealing all of said plurality of lithium-ion cells having said initial enclosure in a secondary enclosure of plastic, with a hermetic seal of said secondary enclosure being made to said case lid.

16. :

The method for sealing a Lithium-ion battery of claim 13, 14 or 15, wherein

each enclosure of plastic is formed of a film of Polyethylene (PE), Polypropylene (PP), Polyurethane (PU), Nylon, Polyethylene terephthalate (PET), Acrylonitrile butadiene styrene (ABS), Fluorinated ethylene propylene (FEP), Polyoxymethylene (Delrin), Polyimide, Polyacrylic, Epoxy resin or a combination of the above.

17. :

The method for sealing a Lithium-ion battery of claim 13, wherein

said initial enclosure of plastic is hermetically sealed at said current collecting tabs by heat sealing or with an adhesive.

18. :

The method for sealing a Lithium-ion battery of claim 14, wherein

said initial enclosure of plastic is hermetically sealed at said current collecting tabs by heat sealing or with an adhesive; and

said secondary enclosure of plastic is hermetically sealed at said common current collectors by heat sealing or with an adhesive.

19. :

The method for sealing a Lithium-ion battery of claim 15, wherein

said initial enclosure of plastic is hermetically sealed at said current collecting tabs by heat sealing or with an adhesive; and

said secondary enclosure of plastic is hermetically sealed at said case lid by heat sealing or with an adhesive.

20. :

The method for sealing a Lithium-ion battery of claim 13, further comprising

providing a plurality of Lithium-ion cells, each having said initial enclosure and connecting said plurality of Lithium-ion cells in series.

21. :

The method for sealing a Lithium-ion battery of claim 13, wherein

said case lid is hermetically sealed to said external case by laser welding, use of a chime seam, or use of a chime seam in combination with a filler provided in the chime seam.

22. :

The method for sealing a Lithium-ion battery of claim 13, further comprising, prior to hermetically sealing each Lithium-ion cell in the initial enclosure,

filling said initial enclosure with said electrolyte;

closing said initial enclosure;

providing a first charging to said lithium-ion cell; and

degassing said closed initial enclosure.