Method for producing a pressurized package for a film packed battery

• US 6,558,438 B1
• Filed: 07/21/2000
• Issued: 05/06/2003
• Est. Priority Date: 07/23/1999
• Status: Expired due to Term

• Current Assignee: Envision AESC Energy Devices Ltd.
• Original Assignee: NEC Corporation, NEC TOKIN Tochigi, Ltd.
• Inventors: Shimizu, Ryuichi, Kumeuchi, Tomokazu, Yageta, Hiroshi, Satoh, Masaharu, Shirakata, Masato, Bannai, Yutaka, Ohyama, Norihide
• Primary Examiner(s): Ryan, Patrick
• Assistant Examiner(s): TSANG FOSTER, SUSY N
• Application Number:
  US09/620,816
• Time in Patent Office: 1,019 Days
• Field of Search: 429/162, 429/163, 429/127, 429/94, 296/231
• US Class Current: 29/623.1
• CPC Class Codes: H01M 10/0413 Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 10/0468 Compression means for stacks of electrodes and separators
• 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 10/054 Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
• CPC Class Codes: H01M 10/0565 Polymeric materials, e.g. gel-type or solid-type
• CPC Class Codes: H01M 10/0587 of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/446 Initial charging measures
• CPC Class Codes: H01M 6/10 with wound or folded electrodes
• CPC Class Codes: H01M 6/181 with polymeric electrolytes
• CPC Class Codes: Y10T 29/49108 Electric battery cell making

Abstract

In a film packed battery, a battery power source comprising, at least, a cathode, an anode, an electrolyte, and a separator is packed with a film. In a method for producing film packed battery, a pre-charging step for charging the film packed battery while pressure is applied, for example, by sandwiching it between two flat plates is included at least once.

Claims

1. A method for producing a film packed battery comprising a battery power source having, at least, a cathode, an anode, an electrolyte, and a separator and packed with a film, comprising at least one precharging step of pre-charging said battery power source while pressure is applied to the battery power source using hydrostatic pressure provided by an insulation liquid.

2. A method for producing a film packed battery according to claim 1, wherein the pressure applied in said pre-charging step is 0.05 MPa or more.

3. A method for producing a film packed battery according to claim 1, wherein said cathode and anode are wound.

4. A method for producing a film packed battery comprising a battery power source having, at least, a cathode, an anode, an electrolyte, and a separator and packed with a film, comprising at least one pre-charging step of pre-charging said battery power source while pressure is applied by a pair of pressing plates having a buffer layer at least on one of said pressing plates, wherein said buffer layer comprises at least two layers including a hard layer and a resilient layer, and said hard layer is disposed so as to be in contact with said battery, said resilient layer is a rubber resilient member in sheet form, and said hard layer is made of a metal sheet or a sheet of resin.

5. A method for producing a film packed battery comprising a battery power source having, at least, a cathode, an anode, an electrolyte, and a separator and packed with a film, comprising at least one pre-charging step of pre-charging said battery power source while pressure is applied, wherein a pressing method in said pre-charging step utilizes hydrostatic pressure and, wherein the battery, before a preparatory charge, is placed in an insulation liquid by a method utilizing hydrostatic pressure.

6. A method of manufacturing a prismatic battery, comprising at least one pre-charging step in which at least one prismatic battery is sandwiched between a pair of pressing plates having a buffer layer at least on one of said pressing plates, and under a condition where an interval between said pressing plates is fixed at a predetermined interval that enables pressing of said prismatic battery, said prismatic battery is charged while pressure is being applied to said prismatic battery, wherein said buffer layer comprises at least two layers of a high hardness layer and a low hardness layer, and said high hardness layer is disposed so as to be in contact with said prismatic battery and, wherein said low hardness layer is a rubber resilient member in a sheet form, and said high hardness layer is made of a metal sheet or a resin sheet.

7. A method of manufacturing a prismatic battery according to claim 6, wherein said prismatic battery is a battery in which battery power sources are packed with a film.

8. A method of manufacturing a prismatic battery according to claim 6, wherein said prismatic battery contains a aprotic electrolyte solution.

9. A method of manufacturing a prismatic battery according to claim 6, wherein said prismatic battery contains a polymer solid electrolyte or a polymer gel electrolyte.

10. A method of manufacturing a prismatic battery according to claim 6, wherein said prismatic battery has battery power sources comprising a cathode and an anode that are wound into a flattened configuration with a separator in between.

11. A method of manufacturing a prismatic battery according to claim 6, wherein a plurality of prismatic batteries is sandwiched between said pair of pressing plates.

12. A method of manufacturing a prismatic battery according to claim 6, wherein said low hardness layer is selected from the group consisting of urethane rubber, expanded urethane rubber, fluororubber copolymer, silicone rubber, silicon sponge rubber, natural rubber, chloroprene rubber, nitrile rubber and acrylic rubber.

13. A method of manufacturing a prismatic battery according to claim 6 wherein said high hardness layer is a metal sheet.

14. A method of manufacturing a prismatic battery according to claim 6, wherein said high hardness layer is a resin sheet.

15. A method of manufacturing a prismatic battery according to claim 14 wherein said high hardness layer is a resin sheet made of a material selected from the group consisting of polyester, polypropylene, polyethylene, acrylic resin and silicone resin.