Non-aqueous electrolyte rechargeable batteries

• US 6,713,215 B2
• Filed: 01/19/2001
• Issued: 03/30/2004
• Est. Priority Date: 02/01/2000
• Status: Expired due to Fees

• Current Assignee: Seiko Instruments Incorporated (Seiko Group)
• Original Assignee: SII Micro Parts Ltd.
• Inventors: Tamachi, Tsuneaki, Takasugi, Shinichi, Harada, Toyoo, Onodera, Hideharu, Watanabe, Shunji, Sakai, Tsugio, Kanno, Yoshimi
• Primary Examiner(s): WEINER, LAURA S
• Application Number:
  US09/765,550
• Publication Number:
  US 20020068221A1
• Time in Patent Office: 1,166 Days
• Field of Search: 429/231.5, 429/231.8, 429/218.1, 429/341, 429/330, 429/323, 429/249, 429/231.95
• US Class Current: 429/231.5
• 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 10/056 characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
• CPC Class Codes: H01M 4/483 for non-aqueous cells H01M4/485 takes precedence
• CPC Class Codes: H01M 4/485 of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy H01M4/505, H01M4/525 take precedence
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 50/109 of button or coin shape
• CPC Class Codes: H01M 50/186 characterised by the disposition of the sealing members
• CPC Class Codes: H01M 50/193 Organic material
• CPC Class Codes: H01M 50/437 Glass
• CPC Class Codes: H01M 50/44 Fibrous material
• CPC Class Codes: H01M 6/162 characterised by the electrolyte
• 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

A non-aqueous electrolyte rechargeable battery is resistant to the reflow temperature during reflow soldering. The non-aqueous electrolyte rechargeable battery has a positive electrode having an active material comprised of an oxide of molybdenum, a negative electrode comprised of lithium and SiO, an electrolytic solution comprised of a material containing a supporting salt and resistant to the reflow temperature during reflow soldering of the non-aqueous electrolyte rechargeable battery, and a gasket comprised of a compound selected from the group consisting of LCP, PEEK, PEN, and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin.

Claims

1. A non-aqueous electrolyte rechargeable battery resistant to the reflow temperature during reflow soldering, the non-aqueous electrolyte rechargeable battery comprising:

a positive electrode having an active material comprised of an oxide of molybdenum;

a negative electrode comprised of lithium and SiO;

a non-aqueous solvent;

an electrolytic solution comprised of a material containing a supporting salt and resistant to the reflow soldering temperature;

a separator comprised of a material resistant to the reflow soldering temperature; and

a gasket comprised of a material resistant to the reflow soldering temperature and selected from the group consisting of a liquid crystal polymer, polyether ether ketone resin, polyether nitrile resin, and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin.

2. A non-aqueous electrolyte rechargeable battery as claimed in claim 1;

wherein the oxide of molybdenum comprises MoO₃.

3. A non-aqueous electrolyte rechargeable battery as claimed in claim 1;

wherein the non-aqueous solvent has a boiling point of 200°

C. or higher under ambient pressure.

4. A non-aqueous electrolyte rechargeable battery as claimed in claim 3;

wherein the supporting salt contains fluorine.

5. A non-aqueous electrolyte rechargeable battery as claimed in claim 3;

wherein the separator is comprised of glass fibers.

6. A non-aqueous electrolyte rechargeable battery as claimed in claim 3;

wherein the separator is comprised of a resin having a thermal deformation temperature of 230°

C. or higher.

7. A non-aqueous electrolyte rechargeable battery as claimed in claim 6;

wherein the resin comprises a compound selected from the group consisting of polyphenylene sulfide, a liquid crystal polymer, polyether ether ketone resin, polyether nitrile resin, and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin.

8. A non-aqueous electrolyte rechargeable battery as claimed in claim 1;

wherein the non-aqueous solvent comprises one of ethylene carbonate (EC) and γ

-butyrolactone (γ

-BL) or a composite thereof; and

wherein the supporting salt comprises one of lithium phosphohexafluoride (LiPF₆) and lithium borohexafluoride (LiBF₄) or a composite thereof.

9. A non-aqueous electrolyte rechargeable battery according to claim 1;

wherein the oxide of molybdenum is represented by the chemical formula MoO_x, where 2≦

x≦

3.

10. A non-aqueous electrolyte rechargeable battery resistant to the reflow temperature during reflow soldering, the non-aqueous electrolyte rechargeable battery comprising:

a positive electrode having an active material comprised of an oxide of molybdenum;

a negative electrode comprised of lithium and SiO;

an electrolytic solution comprised of a material containing a supporting salt and resistant to the reflow soldering temperature; and

a gasket comprised of a compound selected from the group consisting of a liquid crystal polymer, polyether ether ketone resin, polyether nitrile resin, and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin.

11. A non-aqueous electrolyte rechargeable battery as claimed in claim 10;

wherein the oxide of molybdenum comprises MoO₃.

12. A non-aqueous electrolyte rechargeable battery as claimed in claim 10;

further comprising a separator comprised of a heat resistant material.

13. A non-aqueous electrolyte rechargeable battery as claimed in claim 12;

wherein the heat resistant material comprises glass fibers or a resin having a thermal deformation temperature of 230°

C. or higher.

14. A non-aqueous electrolyte rechargeable battery according to claim 10;

wherein the oxide of molybdenum is represented by the chemical formula MoO_x, where 2≦

x≦

3.

15. A non-aqueous electrolyte rechargeable battery resistant to the reflow temperature during reflow soldering, the non-aqueous electrolyte rechargeable battery comprising:

a positive electrode having an active material comprised of an oxide of molybdenum;

a negative electrode comprised of lithium and SiO;

a non-aqueous solvent;

an electrolytic solution comprised of a material containing a supporting salt and resistant to the reflow soldering temperature;

a separator comprised of a material resistant to the reflow soldering temperature; and

a gasket comprised of a material resistant to the reflow soldering temperature and having a thermal deformation temperature of 230°

C. or higher.

16. A non-aqueous electrolyte rechargeable battery according to claim 15;

wherein the resin comprises a compound selected from the group consisting of polyphenylene sulfide, a liquid crystal polymer, polyether ether ketone resin, polyether nitrile resin, and tetrafluoroethylene-perfluoroalkyl vinyl ether copoly-mer resin.