GB2324404A - Sealed duplex electrode electrochemical cell - Google Patents
Sealed duplex electrode electrochemical cell Download PDFInfo
- Publication number
- GB2324404A GB2324404A GB9707926A GB9707926A GB2324404A GB 2324404 A GB2324404 A GB 2324404A GB 9707926 A GB9707926 A GB 9707926A GB 9707926 A GB9707926 A GB 9707926A GB 2324404 A GB2324404 A GB 2324404A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cell
- cell according
- polymer film
- conductive
- electrolyte
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000011149 active material Substances 0.000 claims abstract description 4
- 229920005570 flexible polymer Polymers 0.000 claims abstract 2
- 239000011244 liquid electrolyte Substances 0.000 claims abstract 2
- 229920000642 polymer Polymers 0.000 claims abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 claims description 2
- 229910001416 lithium ion Inorganic materials 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 229920006254 polymer film Polymers 0.000 claims 2
- 239000004642 Polyimide Substances 0.000 claims 1
- 239000002131 composite material Substances 0.000 claims 1
- 239000011530 conductive current collector Substances 0.000 claims 1
- 229920001940 conductive polymer Polymers 0.000 claims 1
- 229920001721 polyimide Polymers 0.000 claims 1
- 239000002861 polymer material Substances 0.000 claims 1
- 239000007784 solid electrolyte Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 2
- 239000005518 polymer electrolyte Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 9
- 239000005030 aluminium foil Substances 0.000 description 3
- 239000010406 cathode material Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920013683 Celanese Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920005596 polymer binder Polymers 0.000 description 1
- 239000002491 polymer binding agent Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
- H01M50/136—Flexibility or foldability
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/562—Terminals characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/029—Bipolar electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/40—Printed batteries, e.g. thin film batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/42—Grouping of primary cells into batteries
- H01M6/46—Grouping of primary cells into batteries of flat cells
- H01M6/48—Grouping of primary cells into batteries of flat cells with bipolar electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
A novel construction for an electrochemical cell is described in which metal layers or films, too thin to be self supporting are formed on either side of a thin flexible polymer film 1b with the active materials which store electrochemical energy being disposed and bonded on to the metal layers. The metal coated polymer sandwich referred to as a duplex electrode is fed through an insulative laminate container 4 to which it is heat sealed thus giving a single piece bi-terminal. The other components of the cell are a microporous separator and liquid electrolyte or a polymer electrolyte which is inherently ion conductive.
Description
Sealed Duplex Electrode Electrochemical Cell
This invention concerns an efficient and cost-effective means for the construction and sealing of an electrochemical cell, particularly a nonaqueous lithium cell having high surface area electrodes.
There are several lithium rechargeable cell systems now on the market e.g.
Lithium ion from Sony Energytec, in which the positive electrode or cathode is a metal oxide or mixture of metal oxides formed as a thin layer on an aluminium foil and an anode or negative electrode which has a layer of carbon or graphite dispersed in a polymer binder coated on to a copper foil current collector. Single layer cells are readily constructed with such active electrodes and spiral winding is used to construct cylindrical cells. In such designs, the volume ratio of current collector to active material tends to be high unless double sided coating of both electrodes is adopted. The latter presents certain production difficulties, in particular, the gross thickness of the cathode makes it difficult to bend the electrodes around small radii as is required in a wound cell.
The present invention provides a means for the production of thin duplex electrodes which can be bent through 1800 without shedding the cathode material. A cost effective means of cell assembly for large units is described and the terminations from the internal electrode pack to the outside of the cell may be brought through as an integrated bi-terminal, obviating the need for any metal toi metal joining. One embodiment of the invention may include a one piece duplex electrode which can be bonded to the internal sides of a container bag by heat sealing.
An embodiment of the invention is best illustrated by reference to Figure 1.
A flexible laminate (1), is shown and consists typically of aluminium foil about 9 microns thick (la), polyester about 8 microns thick (lob) and a conductive layer of copper and/or graphite (it). The conductive layer is coated on one side of the polyester leaving a margin of 2 to 3 mm from both side and end edges in order to avoid short circuits with the aluminium layer.
The thickness of the copper layer is typically 5 microns.
The cathode material (2) is coated on to the aluminium side to give a typical thickness of 150 microns after drying. The duplex electrode thus formed is now folded with a microporous separator (3) such as Celgard 2500 from
Hoeeechst Celanese by bending through 1800, the conductive copper layer being on the inside. This is the preferred configuration since the cathode is always bent convexly and is thus less liable to crumble. Folding up to form a thick section is facilitated since the bending radius increases with each turn.
Electrolyte can be applied either as the folds are beinf made or by vacuum impregnation after the folded pack is completed.
The final step is the placement of the electrode pack in a container which may consist of a laminate bag (4) with the full width of the duplex electrode led out as shown in Figure 2. Cathode material must be removed from the aluminium layer where the seal is to be made. The bag laminate is typically a barrier type material such as is widely used in the food industry, aluminium foil forming the moisture barrier and a polyolefin type of film as a sealant.
The container bag is heat sealed around the edges (5) and completely envelops and bonds to both the aluminium and copper layers.
Claims (8)
1. An electrochemical cell in which the conductive current collector layers are formed on to opposing sides of a thin flexible polymer film which exits through and is hermetically sealed to the container, the battery active materials being coalesced on to the exposed current collector surfaces,
2. A cell according to Claim 1, in which the conductive layers bonded to the polymer film exit to form a combined flat terminal having opposing positive and negative faces.
3. A cell according to Claim 1, in which the current collectors may be metallic, non-metallic, composites of carbon or conductive polymer materials.
4. A cell according to Claim 1, in which the current collectors are copper and aluminium respectively, the active material on the latter being a rechargeable lithium positive electrode.
5. A cell in which the insulating polymer film may consist of a polyimide, a polyester or polyolefin which resists attack by the electrolyte chosen to transfer charge between the active electrodes.
6. A cell in which the electrode structure may be spirally wound to give a cylindrical form or folded flat to give a rectangular configuration.
7. A cell according to claim 6 in which the outward facing positive and negative electrodes are separated by either a microporous polymer layer and liquid electrolyte or a polymeric lithium ion conductive solid electrolyte.
8. A cell as described in any of the preceding claims which is hermetically contained in either a flexible or a rigid enclosure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9707926A GB2324404A (en) | 1997-04-18 | 1997-04-18 | Sealed duplex electrode electrochemical cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9707926A GB2324404A (en) | 1997-04-18 | 1997-04-18 | Sealed duplex electrode electrochemical cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9707926D0 GB9707926D0 (en) | 1997-06-04 |
| GB2324404A true GB2324404A (en) | 1998-10-21 |
Family
ID=10811020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9707926A Withdrawn GB2324404A (en) | 1997-04-18 | 1997-04-18 | Sealed duplex electrode electrochemical cell |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2324404A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0997959A1 (en) * | 1998-10-30 | 2000-05-03 | Sony Corporation | Non-aqueous electrolyte cell and manufacturing method therefor |
| US6190426B1 (en) | 1998-12-17 | 2001-02-20 | Moltech Corporation | Methods of preparing prismatic cells |
| EP1117144A2 (en) * | 2000-01-12 | 2001-07-18 | Wilson Greatbatch Limited | Secondary cell with high rate pulse capability |
| EP1132988A2 (en) * | 2000-03-10 | 2001-09-12 | Sony Corporation | Solid electrolyte battery and production method thereof |
| EP1437779A2 (en) * | 2002-09-30 | 2004-07-14 | Matsushita Electric Industrial Co., Ltd. | Electrode group for battery and non-aqueous electrolyte secondary battery using the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2251118A (en) * | 1990-12-14 | 1992-06-24 | Hope Henry F | Battery packaging construction |
| EP0499005A2 (en) * | 1991-02-14 | 1992-08-19 | Hydro-Quebec | Device for packaging a lithium battery |
| US5360684A (en) * | 1993-10-25 | 1994-11-01 | Hydro-Quebec | Electrochemical cell for polymer electrolyte-lithium batteries (ACEP) |
-
1997
- 1997-04-18 GB GB9707926A patent/GB2324404A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2251118A (en) * | 1990-12-14 | 1992-06-24 | Hope Henry F | Battery packaging construction |
| EP0499005A2 (en) * | 1991-02-14 | 1992-08-19 | Hydro-Quebec | Device for packaging a lithium battery |
| US5360684A (en) * | 1993-10-25 | 1994-11-01 | Hydro-Quebec | Electrochemical cell for polymer electrolyte-lithium batteries (ACEP) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7157179B2 (en) | 1998-10-30 | 2007-01-02 | Sony Corporation | Non-aqueous electrolyte cell and manufacturing method therefor |
| EP0997959A1 (en) * | 1998-10-30 | 2000-05-03 | Sony Corporation | Non-aqueous electrolyte cell and manufacturing method therefor |
| US6387562B1 (en) | 1998-10-30 | 2002-05-14 | Sony Corporation | Non-aqueous electrolyte cell comprising electrode terminal leads attached to the innermost end of a wound electrode assembly |
| US6706080B2 (en) | 1998-10-30 | 2004-03-16 | Sony Corporation | Non-aqueous electrolyte cell and manufacturing method therefor |
| US6190426B1 (en) | 1998-12-17 | 2001-02-20 | Moltech Corporation | Methods of preparing prismatic cells |
| EP1117144A2 (en) * | 2000-01-12 | 2001-07-18 | Wilson Greatbatch Limited | Secondary cell with high rate pulse capability |
| EP1117144A3 (en) * | 2000-01-12 | 2002-09-18 | Wilson Greatbatch Limited | Secondary cell with high rate pulse capability |
| US6641953B2 (en) | 2000-01-12 | 2003-11-04 | Wilson Greatbatch Ltd. | Secondary cell with high rate pulse capability |
| EP1132988A2 (en) * | 2000-03-10 | 2001-09-12 | Sony Corporation | Solid electrolyte battery and production method thereof |
| EP1132988A3 (en) * | 2000-03-10 | 2004-08-04 | Sony Corporation | Solid electrolyte battery and production method thereof |
| EP1437779A3 (en) * | 2002-09-30 | 2006-10-04 | Matsushita Electric Industrial Co., Ltd. | Electrode group for battery and non-aqueous electrolyte secondary battery using the same |
| EP1437779A2 (en) * | 2002-09-30 | 2004-07-14 | Matsushita Electric Industrial Co., Ltd. | Electrode group for battery and non-aqueous electrolyte secondary battery using the same |
| US7425386B2 (en) | 2002-09-30 | 2008-09-16 | Matsushita Electric Industrial Co., Ltd. | Electrode group for battery and non-aqueous electrolyte secondary battery using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9707926D0 (en) | 1997-06-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |