Battery precursor and a battery

• US 5,547,780 A
• Filed: 01/12/1994
• Issued: 08/20/1996
• Est. Priority Date: 01/18/1993
• Status: Expired due to Fees

• Current Assignee: GS Yuasa Corporation
• Original Assignee: GS Yuasa Corporation
• Inventors: Kato, Shiro, Murata, Kazuo, Kagawa, Hiroshi
• Primary Examiner(s): Skapars, Anthony
• Application Number:
  US08/180,424
• Time in Patent Office: 951 Days
• Field of Search: 429/149, 429/152-154, 429/156-160, 429/162, 429/185, 429/127
• US Class Current: 429/149
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 50/209 adapted for prismatic or rectangular cells H01M50/216 takes precedence
• CPC Class Codes: H01M 6/40 Printed batteries , e.g. thin film batteries
• CPC Class Codes: H01M 6/46 of flat cells
• 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

This invention provides a battery precursor for producing a battery through a cutting process, in which a large number of battery elements comprising positive active material layers, separators having electrolytes and negative active material layers are installed in parallel between a plate-like positive current collector plate and a negative current collector plate facing each other, and the respective battery elements are partitioned each other and sealed by insulators. According to this battery precursor, a battery having a voluntary shape can be obtained easily by cutting only.

Claims

1. A battery precursor for producing a battery through a cutting process, in which

a large number of battery elements comprising positive active material layers, separators having electrolytes and negative active material layers are installed in parallel under a state of parallel connection between a plate-like positive current collector plate and a negative current collector plate facing each other, and the respective battery elements are partitioned with respect to each other and sealed by insulators.

15. A battery precursor as set forth in any one of claim 1, 2, 3, 6, 7 or 12, in which its has a thickness smaller than 5 mm incl. and the insulator has a width of smaller than 3 mm incl.

16. A battery precursor as set forth in any one of claim 1, 2, 3, 6, 7 or 12, in which the insulator is made of a material deformable by pressure.

17. A battery precursor as set forth in any one of claim 1, 2, 3, 6, 7 or 12, in which the separator is a solid electrolyte.

2. A battery precursor for producing a battery through a cutting process, in which

a large number of battery elements comprising positive active material layers, separators having electrolytes and negative active material layers are installed in parallel under a state of parallel connection between a plate-like positive current collector plate and a negative current collector plate facing each other, and the respective battery elements are partitioned with respect to each other and sealed by insulators, and

said respective current collector plates are continuous without being interrupted.

3. A battery precursor for producing a battery through a cutting process, in which

a large number of battery elements comprising positive active material layers, separators having electrolytes and negative active material layers are installed in parallel under a state of parallel connection between a plate-like positive current collector plate and a negative current collector plate facing each other, and the respective battery elements are partitioned with respect to each other and sealed by insulators, and

a portion between adjoining battery elements of at least one of said current collector plates is narrowed such that a penetration portion is formed.

4. A battery precursor as set forth in claim 3, in which a width of said narrowed portion is 0.2 to 1.0 mm.

5. A battery precursor as set forth in claim 3, in which a distance of the penetration portion normal to the width of said narrowed portion is 0.1 mm to 1.0 mm.

6. A battery precursor for producing a battery through a cutting process, in which

a large number of battery elements comprising positive active material layers, separators having electrolytes and negative active material layers are installed in parallel under a state of parallel connection between a plate-like positive current collector plate and a negative current collector plate facing each other, and the respective battery elements are partitioned with respect to each other and sealed by insulators, and

penetration portions are formed on parts between adjoining battery elements of said respective current collector plates, the penetration portion of the positive current collector plate faces on a non-penetration portion of the negative current collector plate, and the penetration portion of the negative current collector-plate faces on a non-penetration portion of the positive current collector plate.

7. A battery precursor for producing a battery through a cutting process, in which

a large number of battery elements comprising positive active material layers, separators having electrolytes and negative active material layers are installed in parallel under a state of parallel connection between a plate-like positive current collector plate and a negative current collector plate facing each other, and the respective battery elements are partitioned with respect to each other and sealed by insulators, and

slitted penetration portions are formed on parts between adjoining battery elements of at least one of said current collector plates, and recessed portions are formed on parts of the insulator facing on the penetration portions.

8. A battery precursor as set forth in claim 7, in which penetration portions are formed on said current collector plates, the penetration portion of the positive current collector plate faces on a non-penetration portion of the negative current collector plate, and the penetration portion of the negative current collector plate faces on a non-penetration portion of the positive current collector plate.

9. A battery precursor as set forth in claim 7, in which the recessed portion has an acute-angled bottom formed by cutting-in, and has at its opening a swollen portion formed along an edge of the penetration portion.

10. A battery precursor as set forth in claim 7, in which penetration portions which penetrate any of said battery elements are formed on parts of the positive current collector plate and the negative current collector plate contacting with corners of the respective battery elements, the penetration portion of the positive current collector plate faces on a non-penetration portion of the negative current collector plate, and the penetration portion of the negative current collector plate faces on a non-penetration portion of the positive current collector plate.

11. A battery precursor as set forth in claim 7, having a thickness larger than 0.15 mm incl. and smaller than 1 mm incl.

12. A battery precursor for producing a battery through a cutting process, in which

a large number of battery elements comprising positive active material layers, separators having electrolytes and negative active material layers are installed in parallel under a state of parallel connection between a plate-like positive current collector plate and a negative current collector plate facing each other, and the respective battery elements are partitioned with respect to each other and sealed by insulators, and

the battery precursor is held by a retainer plate by being bonded to the plate at one side of said current collector plates.

13. A battery precursor as set forth in claim 12, in which the retainer plate is a semi-sticky film.

14. A battery precursor as set forth in claim 13, in which an adhesive strength of the semi-sticky film is created by a surface property of the film.

18. A battery constructed by integrating plural plate-like unit batteries, in which

the unit batteries are so integrated on a plane as to be connected in parallel in a selectable direction, and

unit battery is constructed such that a battery element comprising a positive active material layer, a separator having an electrolyte and a negative active material layer is sandwiched between a plate-like positive current collector plate and a negative current collector plate facing each other and the battery element is surrounded and sealed by an insulator.

19. A battery as set forth in claim 18, in which a part between adjoining battery elements of at least one of the positive current collector plate and the negative current collector plate is narrowed because a penetration portion is formed thereat, and a width of the narrowed part is larger than 0.2 mm and smaller than 1.0 mm.

20. A battery as set forth in claim 18, in which a peripheral edge of at least one of the positive current collector plate and the negative current collector plate is located at an inside of the insulator.

21. A battery as set forth in claim 18, in which a slitted penetration portion is formed on a part between adjoining battery elements of at least one of the positive current collector plate and the negative current collector plate, a recessed portion is formed at a part of insulator racing on the penetration portion, and battery elements are laminated by being bent at the penetration portion and the recessed portion.

22. A battery as set forth in claim 21, in which the recessed portion has an acute-angled bottom formed by cutting-in, and has at its opening a swollen portion along an edge of the penetration portion.

23. A battery as set forth in claim 21, in which penetration portions penetrating any of the battery elements are formed on parts of the positive current collector plate and the negative current collector plate contacting with corners of the respective battery elements, the penetration portion of the positive current collector plate faces on a non-penetration portion of the negative current collector plate, and the penetration portion of the negative current collector plate faces on a non-penetration portion of the positive current collector plate.