US20140196839A1 - Battery pouch sheet edge insulation - Google Patents
Battery pouch sheet edge insulation Download PDFInfo
- Publication number
- US20140196839A1 US20140196839A1 US14/217,972 US201414217972A US2014196839A1 US 20140196839 A1 US20140196839 A1 US 20140196839A1 US 201414217972 A US201414217972 A US 201414217972A US 2014196839 A1 US2014196839 A1 US 2014196839A1
- Authority
- US
- United States
- Prior art keywords
- layer
- pouch
- metal layer
- cavity
- insulating layer
- 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.)
- Abandoned
Links
- 238000009413 insulation Methods 0.000 title description 5
- 239000000565 sealant Substances 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 241000206607 Porphyra umbilicalis Species 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 70
- 239000012792 core layer Substances 0.000 description 35
- 229920000642 polymer Polymers 0.000 description 10
- 239000011888 foil Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920006284 nylon film Polymers 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/088—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyamides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- H01M2/02—
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- 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
- 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
- H01M50/133—Thickness
-
- 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/193—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
- H01M50/50—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
- H01M50/557—Plate-shaped terminals
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/44—Number of layers variable across the laminate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1051—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina by folding
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1355—Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
- Y10T428/1359—Three or more layers [continuous layer]
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24752—Laterally noncoextensive components
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31678—Of metal
- Y10T428/31681—Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31725—Of polyamide
Definitions
- An embodiment of the invention relates to a pouch type lithium polymer battery. Other embodiments are also described.
- Batteries are commonly used as an internal power source for such portable devices to enable the device to operate when external power sources are not available. Batteries may employ any of a number of electrochemical technologies and may be manufactured in a variety of form factors.
- interest in pouch type lithium ion polymer batteries also referred to as lithium polymer batteries has increased because of low manufacturing costs, light weight, and easy modification in shape.
- a pouch type lithium polymer battery is constructed by mounting an electrode assembly in a pouch type case that is made of a multi-layer laminate sheet.
- the multi-layer laminate sheet has a core layer that is a metallic foil.
- the metallic foil is substantially moisture and oxygen impervious, to prevent undesirable reactions from moisture or oxygen interacting with an electrolyte inside the case.
- the metal foil is exposed around the edges of the case and thus needs to be insulated to prevent corrosion of the pouch material, which may occur if the metallic foil is grounded or electrically biased as a result of unintended contact with other metal parts in the portable device.
- the sealed edges of the case are manually folded against the sides of the case, and tape is then placed over the sealed edges to insulate the metallic foil and secure the edges against the sides of the case.
- This manual process of insulating the metallic foil can be time consuming and thus expensive.
- folding the sealed edges in this manner and applying tape over them increases the overall size of the battery. This may limit the size of the electrode assembly that can be placed inside the case; alternatively, it may reduce valuable space within the portable electronic device in which the battery is installed.
- the multi-layer laminate sheet includes a core layer, a sealant layer, and an insulating layer.
- the core layer has two surfaces. One surface of the core layer is attached to the sealant layer, and the other surface is attached to the insulating layer.
- the insulating layer is wider than the core layer.
- the sealant layer forms the interior lining of the pouch
- the insulating layer forms the exterior lining of the pouch. Because the insulating layer is wider than the core layer, e.g., similar to an overhang, the peripheral sections of the insulating layer protect the edges of the core layer from being exposed around the edges or a side of the pouch. This inherently insulates the core layer, without the need to fold and tape the peripheral sections of the insulating layer to the side of the pouch.
- FIG. 1 is a perspective view of a multi-layer laminate sheet.
- FIG. 2 is an elevation vie of the multi-layer laminate sheet.
- FIG. 3 is a perspective view of an open pouch.
- FIG. 4 is an elevation view of a closed, but not yet sealed pouch.
- FIG. 5 is a perspective view depicting the placement of an electrode assembly within the pouch.
- FIG. 6 is a top view of a pouch superimposed with an alternative multi-layer laminate sheet, according to another embodiment of the invention.
- FIG. 7 is a flow chart of the operations performed to manufacture a battery pack.
- FIG. 1 and FIG. 2 show a multi-layer laminate sheet 10 that may be used to form a pouch type case for a battery such as a lithium ion polymer battery (also referred to as a lithium polymer battery).
- the multi-layer material 10 may have an inner sealant layer 11 , a core layer 12 , and an outer insulating layer 13 .
- the core layer 12 has a width W1.
- the inner sealant layer 11 may have the same width W1 as the core layer 12 .
- the width W1 is chosen according to the particular design of the battery.
- the outer insulating layer 13 has a width W2 that is greater than the width W1 of the core layer 12 , such that the opposing left and right edges of the outer layer 13 as shown extend far enough past the opposing left and right edges of the core layer 12 , respectively, to provide adequate insulation for the edges of the core layer 12 .
- the edges of the outer layer 13 may extend approximately 0.1 to 0.5 millimeters past the respective edges of the core layer 12 , making the width W2 of the outer layer 13 approximately 0.2 to 1 millimeter greater than the width W1 of the core layer 12 .
- the inner sealant layer 11 may be a polyolefin-based polymer.
- the inner sealant layer 11 directly contacts an electrode assembly. It serves to electrically shield the electrode assembly by virtue of the heat fusion and insulation properties of the polymer.
- the polyolefin-based polymer include, but are not limited to, polypropylene, chlorinated polypropylene, polyethylene, ethylene-propylene copolymer, polyethylene-acrylic acid copolymer, and polypropylene-acrylic acid copolymer.
- casting polypropylene film (CPP) may be used as the inner sealant layer 11 .
- the inner sealant layer 11 may have a thickness in the range of 30 to 150 microns.
- the core layer 12 is interposed between the inner sealant layer 11 and the outer insulating layer 13 . It may be made of a metal foil and serves as a substrate, which prevents moisture and air from penetrating the pouch and maintains the strength of the laminate sheet 10 . Examples of material that may be used to form the metal foil include aluminum, nickel, and steel.
- the core layer 12 may have a thickness in the range of 20 to 150 microns.
- the outer insulating layer 13 provides insulation to protect the other layers, particularly the core layer 12 , of the laminate sheet.
- Examples of a polymer that may be used as the outer layer 13 include nylon, particularly, oriented nylon film.
- the outer layer 13 may have a thickness in the range of 15 to 25 microns.
- the core layer 12 is prepared to have a width that is appropriate for a cell design of an electrode assembly that is to be enclosed by the pouch.
- the inner layer 11 may be prepared to have the same width as the core layer 12 .
- the outer layer 13 is prepared to have a width that is wider than the width of the core layer 12 .
- the inner layer 11 is positioned against one surface of the core layer 12 .
- the outer layer 13 is positioned against the other surface of the core layer 12 , such that the edges of the outer layer 13 extend past the edges of the core layer 12 .
- the layers may then be bonded together using, for example, dry lamination, heat lamination, or extrusion lamination. For instance, an adhesive may be interposed between one layer and another layer and then allowed to dry.
- the adhesive may be an adhesive such as urethane resin, which has an adhesion and tensile strength that prevents interlayer separation over time and prevents the pouch from being damaged by external impacts.
- the layers are then bonded to each other using a heating roll under a predetermined pressure at a temperature higher than room temperature.
- the layers may be bonded to each other using a pressure roll under a predetermined pressure at room temperature.
- FIG. 3 and FIG. 4 show a pouch type case 20 that may be constructed from the multi-layer laminate sheet 10 .
- a cavity 21 may be formed in the laminate sheet 10 , and the laminate sheet 10 is folded to create a top section 22 that covers the cavity 21 .
- first and second sections of the sheet are folded about a fold line that is substantially perpendicular to the opposing edges of the sheet 10 , as shown in FIG. 3 .
- the cavity 21 and the top section 22 are created such the inner sealant layer 11 forms the interior surface of the pouch 20 and the outer insulating layer 13 forms the exterior surface of the pouch 20 .
- the cavity 21 has a predetermined width and depth for receiving an electrode assembly 30 , as shown in FIG. 5 .
- the top section 22 and the margin 23 of the sheet 10 surrounding the cavity 21 may be bonded together to seal the pouch, as shown in FIG. 4 .
- the pouch 20 may be heat sealed along three sides of the pouch 20 as shown.
- a fourth side of the pouch 20 is typically formed by the folding of the pouch 20 to create the top section 22 and thus does not require heat sealing.
- the peripheral portion of the inner sealant layer 11 at the top section 22 and the portion of the inner sealant layer 11 at a flange or margin 23 may be bonded to each other to result in a completely sealed pouch 20 .
- the pouch may be created from two separate multi-layer laminate sheets 10 .
- a cavity may be formed in one of the two sheets.
- the other sheet may be used as the top section of the pouch that covers the cavity.
- the top section and the margin of the sheet surrounding the cavity may be bonded together to seal the pouch.
- the pouch may be heat sealed along four sides of the pouch.
- the peripheral portion of the inner sealant layer of the top section and the inner sealant layer of the margin may be bonded to each other to result in a completely sealed pouch.
- cavities may be formed in both the top section and the bottom section of the pouch.
- the multi-layer laminate sheet may be folded about a told line that is substantially perpendicular to the opposing edges of the sheet to create the top section and the bottom section.
- two separate sheets may be used for the top section and the bottom section.
- the cavity of each section may, for example, have a depth that is one-half the height of the electrode assembly. After placing the electrode assembly in the cavity of the bottom section, the cavity of the top section may be positioned over the electrode assembly.
- the margin of the top section surrounding the top cavity and the margin of the bottom section surrounding the bottom cavity may be bonded together to seal the pouch.
- the portion of the inner sealant layer at the margin of the top section and the portion of the inner sealant at the margin of the bottom section may be bonded to each other to result in a completely sealed pouch.
- the sheet 10 could also be prepared so as to have a further overhanging section at its end 25 .
- the latter is the cut end of the pouch 20 , opposing the end through which the fold line runs (see FIG. 3 ).
- FIG. 3 shows the pouch 20 as having substantially straight sides 24 _L, 24 _R, and a substantially straight end 25 .
- the sides 24 _L, 24 _R, and the end 25 of the pouch 20 may not be straight.
- the margin 23 may have a variable width around the cavity 21 , where the width is dependent upon the shape and size of the cavity.
- the variable width of the margin 23 may cause the sides 24 _L, 24 _R, and end 25 to have a wavy shape, and thus the edges of the bottom section of the pouch 20 may not align with the edges of the top section 56 .
- the multi-layer laminate sheet may be designed and manufactured to have a shape that compensates for this effect.
- the sheet may have a shape such that when the cavity is formed in the sheet, the sides 24 _L, 24 _R, and end 25 will be substantially straight and align with the edges of the top section 56 .
- the shape of the sheet may be dependent upon the shape and size of the cavity that is to be formed in the sheet.
- FIG. 6 shows an example of the pouch 20 having a variable width margin 23 .
- the sides 24 _L, 24 _R, and the end 25 of the pouch 20 may be wavy with the margin 23 being narrower around the sides of the cavity 21 , as compared to the margin 23 around the corners of the cavity 21 . This is due to more sheet material being pulled into the center of the cavity 21 to form the cavity 21 .
- the sheet in which the cavity 21 is to be formed may be manufactured such that the sheet 50 is narrower near the corners 51 , 52 of the sheet 50 , and wider towards the center of each side 54 _R, 54 _L of the sheet 50 before forming the cavity 21 .
- the sheet 50 may have a shorter length near the corners 51 , 52 and a longer length at the center of the end 55 .
- the sheet 50 has an overhanging outer insulating layer (not shown) and a core layer (not shown), with each layer having a shape similar to the sheet 50 that is shown in FIG. 6 .
- the opposing left and right edges of the outer insulating layer extend far enough past the opposing right and left edges of the core layer, respectively, to provide adequate insulation for the edges of the core layer.
- the sheet 50 may be designed to have a shape other than that shown in FIG. 6 , depending on the size and shape of the cavity 21 .
- the sealed pouch 20 has portions of the outer insulating layer 13 , at the top section 22 and at the cavity 21 , extending past the edges of the core layer 12 (in the top section 22 and in the cavity 21 ). This prevents the core layer 12 from being exposed around the edges of the pouch 20 and thus provides electrical insulation for the core layer 12 , without manual processing of the pouch 20 by, for example, folding and taping the sealed edges to the side of the pouch 20 . Eliminating the tape may reduce the overall height of the battery pack by about 50 microns and the overall width by about 100 microns. This may contribute about 1% to 2% additional energy density (by virtue of fitting a larger battery cell and electrode assembly).
- the extended portions of the outer insulating layer 13 may be folded inward (in the direction of the arrows shown in FIG. 4 ) and heat sealed or otherwise bonded together (or to the side of the pouch 20 ), to provide further protection for the core layer 12 .
- the pouch 20 may enclose an electrode assembly 30 .
- the electrode assembly 30 includes a positive electrode plate 31 that has a coating made of positive active materials and a negative electrode plate 32 that has a coating made of negative active materials.
- An electrolyte separator 33 may be positioned between the positive electrode plate 31 and the negative electrode plate 32 , to prevent a short circuit between the positive electrode plate 31 and the negative electrode plate 32 and allowing only appropriate chemical transport between the positive electrode plate 31 and the negative electrode plate 32 . Electrode assemblies of other suitable battery chemistries are possible.
- a positive electrode tab 34 is bonded to the positive electrode plate 31 and protrudes for a predetermined length to extend outside of the pouch.
- a negative electrode tab 35 is bonded to the negative electrode plate 32 and protrudes for a predetermined length to extend outside of the pouch.
- the positive electrode tab 34 and the negative electrode tab 35 may be made of materials such as aluminum, copper, or nickel.
- the tabs 34 and 35 should have sufficient thickness and size to carry a substantial amount of current without any appreciable voltage drop.
- Insulating sleeves 36 may be installed on the positive electrode tab 34 and the negative electrode tab 35 to prevent a short circuit between the electrode tabs 34 and 35 and the core layer 12 of the pouch 20 (at the outside edge of the margin 23 ).
- the insulating sleeves 36 should form a hermetic seal, to prevent air and moisture from entering the pouch 20 and electrolyte from leaking out of the pouch 20 .
- FIG. 7 is a flow chart of the operations performed to manufacture a battery pack using the multi-layer sheet 10 .
- Manufacturing the battery pack includes preparing the multi-layer laminate sheet 10 (block 40 ), preparing the pouch 20 (block 41 ), installing the electrode assembly 30 (block 42 ), and sealing the pouch 20 (block 43 ). These operations have been described in detail above.
- FIG. 5 shows a pouch 20 as containing an electrode assembly 30
- the pouch 20 may alternatively be used to house multiple cells each of which may have been separately sealed.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
A multi-layer laminate sheet suitable to form a battery pouch is described. The laminate sheet includes a core metal layer, a sealant laver, and an insulating layer. The sealant layer is bonded to one surface of the core metal layer, and the insulating layer is bonded to the other surface of the core metal layer. The insulating layer has a width that is greater than the width of the core metal layer, such that the insulating layer extends past two edges of the core metal layer. When the pouch is formed by folding the laminate sheet, the insulating layer protects the edges of the core metal layer of the laminate sheet from being exposed around the edges or sides of the pouch. Other embodiments are also described and claimed.
Description
- This application is a divisional of co-pending U.S. application Ser. No. 13/175,292 filed on Jul. 1, 2011.
- An embodiment of the invention relates to a pouch type lithium polymer battery. Other embodiments are also described.
- Recently, compact and light portable electronic devices, such as smart phones, notebook and tablet computers, and media players, have been actively developed and produced. Batteries are commonly used as an internal power source for such portable devices to enable the device to operate when external power sources are not available. Batteries may employ any of a number of electrochemical technologies and may be manufactured in a variety of form factors. For portable devices, interest in pouch type lithium ion polymer batteries (also referred to as lithium polymer batteries has increased because of low manufacturing costs, light weight, and easy modification in shape.
- A pouch type lithium polymer battery is constructed by mounting an electrode assembly in a pouch type case that is made of a multi-layer laminate sheet. In conventional pouch type batteries, the multi-layer laminate sheet has a core layer that is a metallic foil. The metallic foil is substantially moisture and oxygen impervious, to prevent undesirable reactions from moisture or oxygen interacting with an electrolyte inside the case. When the case is sealed, the metal foil is exposed around the edges of the case and thus needs to be insulated to prevent corrosion of the pouch material, which may occur if the metallic foil is grounded or electrically biased as a result of unintended contact with other metal parts in the portable device. Typically, to insulate the metallic foil, the sealed edges of the case are manually folded against the sides of the case, and tape is then placed over the sealed edges to insulate the metallic foil and secure the edges against the sides of the case. This manual process of insulating the metallic foil can be time consuming and thus expensive. Furthermore, folding the sealed edges in this manner and applying tape over them increases the overall size of the battery. This may limit the size of the electrode assembly that can be placed inside the case; alternatively, it may reduce valuable space within the portable electronic device in which the battery is installed.
- A battery pouch sheet that inherently insulates an edge of a core metal layer of the sheet is described. The multi-layer laminate sheet includes a core layer, a sealant layer, and an insulating layer. The core layer has two surfaces. One surface of the core layer is attached to the sealant layer, and the other surface is attached to the insulating layer. The insulating layer is wider than the core layer.
- In one embodiment, when the sheet is folded and heat sealed to form a pouch that encloses a battery electrode assembly, the sealant layer forms the interior lining of the pouch, and the insulating layer forms the exterior lining of the pouch. Because the insulating layer is wider than the core layer, e.g., similar to an overhang, the peripheral sections of the insulating layer protect the edges of the core layer from being exposed around the edges or a side of the pouch. This inherently insulates the core layer, without the need to fold and tape the peripheral sections of the insulating layer to the side of the pouch.
- The above summary does not include an exhaustive list of all aspects of the present invention. It is contemplated that the invention includes all systems and methods that can be practiced from all suitable combinations of the various aspects summarized above, as well as those disclosed in the Detailed Description below and particularly pointed out in the claims filed with the application. Such combinations have particular advantages not specifically recited in the above summary.
- Embodiments of the invention will now be described with reference to the drawings summarized below. The embodiments of the invention are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment of the invention in this disclosure are not necessarily to the same embodiment, and they mean at leas one.
-
FIG. 1 is a perspective view of a multi-layer laminate sheet. -
FIG. 2 is an elevation vie of the multi-layer laminate sheet. -
FIG. 3 is a perspective view of an open pouch. -
FIG. 4 is an elevation view of a closed, but not yet sealed pouch. -
FIG. 5 is a perspective view depicting the placement of an electrode assembly within the pouch. -
FIG. 6 is a top view of a pouch superimposed with an alternative multi-layer laminate sheet, according to another embodiment of the invention. -
FIG. 7 is a flow chart of the operations performed to manufacture a battery pack. - Several embodiments of the invention with reference to the appended drawings are now explained. Whenever the shapes, relative positions, and other aspects of the parts described in the embodiments are not clearly defined, the scope of the invention is not limited only to the parts shown, which are meant merely for the purpose of illustration. Also, while numerous details are set forth, it is understood that some embodiments of the invention may be practiced without these details. In other instances, well-known circuits, structures, and techniques have not been shown in detail so as not to obscure the understanding of this description.
-
FIG. 1 andFIG. 2 show amulti-layer laminate sheet 10 that may be used to form a pouch type case for a battery such as a lithium ion polymer battery (also referred to as a lithium polymer battery). Themulti-layer material 10 may have aninner sealant layer 11, acore layer 12, and anouter insulating layer 13. Thecore layer 12 has a width W1. Theinner sealant layer 11 may have the same width W1 as thecore layer 12. The width W1 is chosen according to the particular design of the battery. Theouter insulating layer 13 has a width W2 that is greater than the width W1 of thecore layer 12, such that the opposing left and right edges of theouter layer 13 as shown extend far enough past the opposing left and right edges of thecore layer 12, respectively, to provide adequate insulation for the edges of thecore layer 12. For example, the edges of theouter layer 13 may extend approximately 0.1 to 0.5 millimeters past the respective edges of thecore layer 12, making the width W2 of theouter layer 13 approximately 0.2 to 1 millimeter greater than the width W1 of thecore layer 12. - The
inner sealant layer 11 may be a polyolefin-based polymer. Theinner sealant layer 11 directly contacts an electrode assembly. It serves to electrically shield the electrode assembly by virtue of the heat fusion and insulation properties of the polymer. Examples of the polyolefin-based polymer include, but are not limited to, polypropylene, chlorinated polypropylene, polyethylene, ethylene-propylene copolymer, polyethylene-acrylic acid copolymer, and polypropylene-acrylic acid copolymer. In particular, casting polypropylene film (CPP) may be used as theinner sealant layer 11. Theinner sealant layer 11 may have a thickness in the range of 30 to 150 microns. - The
core layer 12 is interposed between theinner sealant layer 11 and theouter insulating layer 13. It may be made of a metal foil and serves as a substrate, which prevents moisture and air from penetrating the pouch and maintains the strength of thelaminate sheet 10. Examples of material that may be used to form the metal foil include aluminum, nickel, and steel. Thecore layer 12 may have a thickness in the range of 20 to 150 microns. - The
outer insulating layer 13 provides insulation to protect the other layers, particularly thecore layer 12, of the laminate sheet. Examples of a polymer that may be used as theouter layer 13 include nylon, particularly, oriented nylon film. Theouter layer 13 may have a thickness in the range of 15 to 25 microns. - To form the
multi-layer sheet 10, thecore layer 12 is prepared to have a width that is appropriate for a cell design of an electrode assembly that is to be enclosed by the pouch. Theinner layer 11 may be prepared to have the same width as thecore layer 12. Theouter layer 13 is prepared to have a width that is wider than the width of thecore layer 12. Theinner layer 11 is positioned against one surface of thecore layer 12. Theouter layer 13 is positioned against the other surface of thecore layer 12, such that the edges of theouter layer 13 extend past the edges of thecore layer 12. The layers may then be bonded together using, for example, dry lamination, heat lamination, or extrusion lamination. For instance, an adhesive may be interposed between one layer and another layer and then allowed to dry. The adhesive may be an adhesive such as urethane resin, which has an adhesion and tensile strength that prevents interlayer separation over time and prevents the pouch from being damaged by external impacts. The layers are then bonded to each other using a heating roll under a predetermined pressure at a temperature higher than room temperature. Alternatively, the layers may be bonded to each other using a pressure roll under a predetermined pressure at room temperature. -
FIG. 3 andFIG. 4 show apouch type case 20 that may be constructed from themulti-layer laminate sheet 10. To create thepouch 20, acavity 21 may be formed in thelaminate sheet 10, and thelaminate sheet 10 is folded to create atop section 22 that covers thecavity 21. In one embodiment, first and second sections of the sheet are folded about a fold line that is substantially perpendicular to the opposing edges of thesheet 10, as shown inFIG. 3 . Thecavity 21 and thetop section 22 are created such theinner sealant layer 11 forms the interior surface of thepouch 20 and the outer insulatinglayer 13 forms the exterior surface of thepouch 20. Thecavity 21 has a predetermined width and depth for receiving anelectrode assembly 30, as shown inFIG. 5 . - After placing the
electrode assembly 30 in thecavity 21, thetop section 22 and themargin 23 of thesheet 10 surrounding thecavity 21 may be bonded together to seal the pouch, as shown inFIG. 4 . Thepouch 20 may be heat sealed along three sides of thepouch 20 as shown. A fourth side of thepouch 20 is typically formed by the folding of thepouch 20 to create thetop section 22 and thus does not require heat sealing. To enclose theelectrode assembly 30 and seal thepouch 20, the peripheral portion of theinner sealant layer 11 at thetop section 22 and the portion of theinner sealant layer 11 at a flange ormargin 23 may be bonded to each other to result in a completely sealedpouch 20. - In another embodiment, the pouch may be created from two separate
multi-layer laminate sheets 10. A cavity may be formed in one of the two sheets. The other sheet may be used as the top section of the pouch that covers the cavity. After placing the electrode assembly in the cavity, the top section and the margin of the sheet surrounding the cavity may be bonded together to seal the pouch. In this case, the pouch may be heat sealed along four sides of the pouch. To enclose the electrode assembly and seal the pouch, the peripheral portion of the inner sealant layer of the top section and the inner sealant layer of the margin may be bonded to each other to result in a completely sealed pouch. - In yet another embodiment, cavities may be formed in both the top section and the bottom section of the pouch. In one embodiment, the multi-layer laminate sheet may be folded about a told line that is substantially perpendicular to the opposing edges of the sheet to create the top section and the bottom section. In another embodiment, two separate sheets may be used for the top section and the bottom section. The cavity of each section may, for example, have a depth that is one-half the height of the electrode assembly. After placing the electrode assembly in the cavity of the bottom section, the cavity of the top section may be positioned over the electrode assembly. The margin of the top section surrounding the top cavity and the margin of the bottom section surrounding the bottom cavity may be bonded together to seal the pouch. To enclose the electrode assembly and seal the pouch, the portion of the inner sealant layer at the margin of the top section and the portion of the inner sealant at the margin of the bottom section may be bonded to each other to result in a completely sealed pouch.
- Note that while the figures here show the
sheet 10 having the “overhanging” peripheral sections of the insulatinglayer 13 at the two opposing sides 24_L, 24_R of the pouch 20 (see for exampleFIG. 3 ), thesheet 10 could also be prepared so as to have a further overhanging section at itsend 25. The latter is the cut end of thepouch 20, opposing the end through which the fold line runs (seeFIG. 3 ). -
FIG. 3 shows thepouch 20 as having substantially straight sides 24_L, 24_R, and a substantiallystraight end 25. However, when thecavity 21 is formed in themulti-layer laminate sheet 10 with each layer having substantially straight edges, the sides 24_L, 24_R, and theend 25 of thepouch 20 may not be straight. Rather, themargin 23 may have a variable width around thecavity 21, where the width is dependent upon the shape and size of the cavity. The variable width of themargin 23 may cause the sides 24_L, 24_R, and end 25 to have a wavy shape, and thus the edges of the bottom section of thepouch 20 may not align with the edges of thetop section 56. The multi-layer laminate sheet may be designed and manufactured to have a shape that compensates for this effect. The sheet may have a shape such that when the cavity is formed in the sheet, the sides 24_L, 24_R, and end 25 will be substantially straight and align with the edges of thetop section 56. The shape of the sheet may be dependent upon the shape and size of the cavity that is to be formed in the sheet. -
FIG. 6 shows an example of thepouch 20 having avariable width margin 23. InFIG. 6 , the sides 24_L, 24_R, and theend 25 of thepouch 20 may be wavy with themargin 23 being narrower around the sides of thecavity 21, as compared to themargin 23 around the corners of thecavity 21. This is due to more sheet material being pulled into the center of thecavity 21 to form thecavity 21. To compensate for this effect, the sheet in which thecavity 21 is to be formed, referred to here as a sheet 50 (shown by the dotted line), may be manufactured such that thesheet 50 is narrower near thecorners sheet 50, and wider towards the center of each side 54_R, 54_L of thesheet 50 before forming thecavity 21. Thesheet 50 may have a shorter length near thecorners end 55. Thesheet 50 has an overhanging outer insulating layer (not shown) and a core layer (not shown), with each layer having a shape similar to thesheet 50 that is shown inFIG. 6 . The opposing left and right edges of the outer insulating layer extend far enough past the opposing right and left edges of the core layer, respectively, to provide adequate insulation for the edges of the core layer. When a cavity is formed in thesheet 50, more sheet material may be pulled into the center of thecavity 21 from the center of the sides 54_L, 54_R and end 55 of thesheet 50 to form thecavity 21. This may result in a pouch with a cavity section that has substantially straight sides and ends (unlike thepouch 20 shown inFIG. 6 ). After thecavity 21 is formed and thesheet 50 is folded along the fold line to form atop section 56, the sides 54_L, 54_R and end 55 of the cavity section will align with the straight edges of thetop section 56. Thus, the edges of the overhanging outer insulating layer at the cavity section will align with the edges of the overhanging outer insulating layer at thetop section 56, thereby preventing the core layer from being exposed around the edges of the pouch and providing electrical insulation for the core layer. Thesheet 50 may be designed to have a shape other than that shown inFIG. 6 , depending on the size and shape of thecavity 21. - As shown in
FIG. 4 , the sealedpouch 20 has portions of the outer insulatinglayer 13, at thetop section 22 and at thecavity 21, extending past the edges of the core layer 12 (in thetop section 22 and in the cavity 21). This prevents thecore layer 12 from being exposed around the edges of thepouch 20 and thus provides electrical insulation for thecore layer 12, without manual processing of thepouch 20 by, for example, folding and taping the sealed edges to the side of thepouch 20. Eliminating the tape may reduce the overall height of the battery pack by about 50 microns and the overall width by about 100 microns. This may contribute about 1% to 2% additional energy density (by virtue of fitting a larger battery cell and electrode assembly). The extended portions of the outer insulatinglayer 13 may be folded inward (in the direction of the arrows shown inFIG. 4 ) and heat sealed or otherwise bonded together (or to the side of the pouch 20), to provide further protection for thecore layer 12. - Referring to
FIG. 5 , thepouch 20 may enclose anelectrode assembly 30. Theelectrode assembly 30 includes apositive electrode plate 31 that has a coating made of positive active materials and anegative electrode plate 32 that has a coating made of negative active materials. Anelectrolyte separator 33 may be positioned between thepositive electrode plate 31 and thenegative electrode plate 32, to prevent a short circuit between thepositive electrode plate 31 and thenegative electrode plate 32 and allowing only appropriate chemical transport between thepositive electrode plate 31 and thenegative electrode plate 32. Electrode assemblies of other suitable battery chemistries are possible. - A
positive electrode tab 34 is bonded to thepositive electrode plate 31 and protrudes for a predetermined length to extend outside of the pouch. Similarly, anegative electrode tab 35 is bonded to thenegative electrode plate 32 and protrudes for a predetermined length to extend outside of the pouch. Thepositive electrode tab 34 and thenegative electrode tab 35 may be made of materials such as aluminum, copper, or nickel. Thetabs - Insulating
sleeves 36 may be installed on thepositive electrode tab 34 and thenegative electrode tab 35 to prevent a short circuit between theelectrode tabs core layer 12 of the pouch 20 (at the outside edge of the margin 23). The insulatingsleeves 36 should form a hermetic seal, to prevent air and moisture from entering thepouch 20 and electrolyte from leaking out of thepouch 20. -
FIG. 7 is a flow chart of the operations performed to manufacture a battery pack using themulti-layer sheet 10. Manufacturing the battery pack includes preparing the multi-layer laminate sheet 10 (block 40), preparing the pouch 20 (block 41), installing the electrode assembly 30 (block 42), and sealing the pouch 20 (block 43). These operations have been described in detail above. - For purposes of explanation, specific embodiments were described to provide a thorough understanding of the present invention. These should not be construed as limiting the scope of the invention but merely as illustrating different examples and aspects of the invention. It should be appreciated that the scope of the invention includes other embodiments not discussed in detail above. Various other modifications, changes, and variations which will be apparent to those skilled in the art may be made in the arrangement, operation, and details of the apparatus and methods of the present invention disclosed herein without departing from the spirit and scope of the invention as defined in the appended claims. For instance, while
FIG. 5 shows apouch 20 as containing anelectrode assembly 30, thepouch 20 may alternatively be used to house multiple cells each of which may have been separately sealed. Therefore, the scope of the invention should be determined by the claims and their legal equivalents. Such equivalents include both currently known equivalents as well as equivalents developed in the future, i.e., any elements developed that perform the same function, regardless of structure. Furthermore, no element, component, or method step is intended to he dedicated to the public regardless of whether the element, component, or method step is explicitly recited in the claims.
Claims (6)
1. A method for manufacturing a multi-layer sheet suitable to form a battery pouch, comprising:
preparing a metal layer to have a predetermined width;
preparing an insulating layer to be wider than the metal layer;
positioning the insulating layer against the metal layer such that opposing edges of the insulating layer extend past opposing edges of the metal layer, respectively; and
bonding the metal layer to the insulating layer as positioned.
2. The method of claim 1 , wherein the insulating layer is approximately 400 microns wider than the metal layer.
3. The method of claim 1 , further comprising:
preparing a sealant layer to have approximately the predetermined width of the metal layer; and
bonding the sealant layer to the metal layer.
4. A method for manufacturing a battery pouch for housing an electrode assembly, comprising:
forming a cavity in a multi-layer sheet, the multi-layer sheet having an insulating layer, a sealant layer, and a core metal layer sandwiched by the insulating and sealant layers, wherein the insulating layer is wider than the core metal layer so that a peripheral portion of the insulating layer extends beyond an exposed edge of the core metal layer;
positioning the electrode assembly within the cavity;
folding the multi-layer sheet to form a top section that covers a bottom section in which the cavity is formed; and
sealing the cavity in which the electrode assembly is contained by bonding the sealant layer in the top section to the sealant layer in the bottom section.
5. The method of claim 4 , further comprising:
folding the peripheral portion of the insulating layer over so as to cover the exposed edge of the core metal layer.
6. The method of claim 4 , wherein sealing the cavity comprises:
applying heat and pressure to the insulating layer in the top and bottom sections.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/217,972 US20140196839A1 (en) | 2011-07-01 | 2014-03-18 | Battery pouch sheet edge insulation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/175,292 US8709645B2 (en) | 2011-07-01 | 2011-07-01 | Battery pouch sheet edge insulation |
US14/217,972 US20140196839A1 (en) | 2011-07-01 | 2014-03-18 | Battery pouch sheet edge insulation |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/175,292 Division US8709645B2 (en) | 2011-07-01 | 2011-07-01 | Battery pouch sheet edge insulation |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140196839A1 true US20140196839A1 (en) | 2014-07-17 |
Family
ID=47391000
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/175,292 Active 2032-02-21 US8709645B2 (en) | 2011-07-01 | 2011-07-01 | Battery pouch sheet edge insulation |
US14/217,972 Abandoned US20140196839A1 (en) | 2011-07-01 | 2014-03-18 | Battery pouch sheet edge insulation |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/175,292 Active 2032-02-21 US8709645B2 (en) | 2011-07-01 | 2011-07-01 | Battery pouch sheet edge insulation |
Country Status (3)
Country | Link |
---|---|
US (2) | US8709645B2 (en) |
CN (1) | CN102848646B (en) |
TW (1) | TWI453118B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11611132B2 (en) | 2017-05-10 | 2023-03-21 | Apple Inc. | Battery cap with cut-out sections |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101219252B1 (en) * | 2010-12-16 | 2013-01-07 | 삼성에스디아이 주식회사 | Pouch case for secondary battery and secondary battery using the same |
KR101905081B1 (en) * | 2011-12-09 | 2018-11-30 | 삼성에스디아이 주식회사 | Battery pack |
KR102073192B1 (en) * | 2013-08-07 | 2020-02-04 | 삼성에스디아이 주식회사 | Pouch type battery cell |
US9685649B2 (en) | 2013-09-25 | 2017-06-20 | Lg Chem, Ltd. | Electrode assembly and secondary battery including the same |
JP6331316B2 (en) * | 2013-10-03 | 2018-05-30 | 凸版印刷株式会社 | Secondary battery exterior material and secondary battery |
CN103579538B (en) * | 2013-11-14 | 2016-04-06 | 东莞新能源科技有限公司 | Packaging seal structure and preparation method thereof and flexible-packed battery |
US10403922B2 (en) | 2014-07-23 | 2019-09-03 | Palo Alto Research Center Incorporated | Battery with embedded fiber optic cable |
US10446886B2 (en) | 2014-07-23 | 2019-10-15 | Palo Alto Research Center Incorporated | Embedded fiber optic cables for battery management |
US20160351865A1 (en) * | 2015-05-27 | 2016-12-01 | GM Global Technology Operations LLC | Folded laminate battery cell |
WO2017177358A1 (en) * | 2016-04-11 | 2017-10-19 | 宁德新能源科技有限公司 | Packaging seal structure, preparation method therefor and flexibly packaged cell |
CN107293652B (en) * | 2016-04-11 | 2020-10-02 | 宁德新能源科技有限公司 | Packaging seal structure, preparation method thereof and flexible packaging battery |
CN108428812B (en) * | 2017-02-15 | 2021-02-02 | 宁德新能源科技有限公司 | Packaging shell and laminate polymer battery |
CN108428814B (en) * | 2017-02-15 | 2021-09-07 | 宁德新能源科技有限公司 | Packaging film and soft package battery |
KR102503738B1 (en) * | 2019-03-04 | 2023-02-27 | 주식회사 엘지에너지솔루션 | Case for secondary battery and secondary battery |
CN112072013B (en) * | 2019-05-17 | 2023-12-29 | 宁德时代新能源科技股份有限公司 | Secondary battery |
CN110190316B (en) * | 2019-05-17 | 2024-05-10 | 宁德时代新能源科技股份有限公司 | Secondary battery |
JP2023539355A (en) * | 2020-09-23 | 2023-09-13 | 寧徳新能源科技有限公司 | battery |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040038125A1 (en) * | 2002-06-17 | 2004-02-26 | Samsung Sdi Co., Ltd. | Reinforced pouch type secondary battery |
US20040110068A1 (en) * | 2001-06-07 | 2004-06-10 | Mitsubishi Chemical Corporation | Lithium secondary cell |
JP2008021634A (en) * | 2006-07-10 | 2008-01-31 | Lg Chem Ltd | Secondary battery with security of sealing part improved |
US20100003594A1 (en) * | 2008-07-01 | 2010-01-07 | Samsung Sdi Co., Ltd. | Pouch-type lithium secondary battery |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4503133A (en) * | 1983-12-22 | 1985-03-05 | Union Carbide Corporation | Leak resistant galvanic cell and process for the production thereof |
JPH0495339A (en) * | 1990-07-31 | 1992-03-27 | Shin Kobe Electric Mach Co Ltd | Sealed lead storage battery |
US6596391B2 (en) * | 1997-05-14 | 2003-07-22 | Honeywell International Inc. | Very ultra thin conductor layers for printed wiring boards |
WO1999040634A1 (en) * | 1998-02-05 | 1999-08-12 | Dai Nippon Printing Co., Ltd. | Sheet for cell case and cell device |
US6048638A (en) | 1998-05-29 | 2000-04-11 | Motorola, Inc. | Flexible battery |
US7297441B2 (en) * | 1998-10-23 | 2007-11-20 | Sony Corporation | Nonaqueous-electrolyte secondary battery |
US6296967B1 (en) | 1999-09-24 | 2001-10-02 | Electrofuel Inc. | Lithium battery structure incorporating lithium pouch cells |
JP3831939B2 (en) * | 2001-11-12 | 2006-10-11 | ソニー株式会社 | battery |
KR20040054128A (en) * | 2002-12-17 | 2004-06-25 | 삼성에스디아이 주식회사 | Pouched-type lithium secondary battery |
JP4605389B2 (en) * | 2003-07-31 | 2011-01-05 | 日本電気株式会社 | Lithium ion secondary battery |
KR100601519B1 (en) | 2004-06-22 | 2006-07-19 | 삼성에스디아이 주식회사 | Pouch type lithium polymer battery and its manufacturing method |
KR100601534B1 (en) | 2004-07-28 | 2006-07-19 | 삼성에스디아이 주식회사 | Battery outer body and lithium polymer battery using it |
KR100601511B1 (en) | 2004-09-24 | 2006-07-19 | 삼성에스디아이 주식회사 | Lithium polymer battery and its manufacturing method |
KR100614373B1 (en) | 2004-09-24 | 2006-08-21 | 삼성에스디아이 주식회사 | Lithium polymer battery having reinforcement layer and its manufacturing method |
WO2006073277A1 (en) | 2005-01-07 | 2006-07-13 | Lg Chem, Ltd. | Case for batteries and preparation method thereof |
KR101042132B1 (en) | 2005-03-23 | 2011-06-16 | 에스케이이노베이션 주식회사 | Case for high power rechargeable lithium battery |
KR100965049B1 (en) | 2005-03-23 | 2010-06-21 | 에스케이에너지 주식회사 | Layer-up for high power lithium polymer battery |
US8852791B2 (en) | 2005-03-28 | 2014-10-07 | Samsung Sdi Co., Ltd. | Pouch type lithium secondary battery with sleeve and method of fabricating |
KR100709881B1 (en) | 2005-09-28 | 2007-04-20 | 삼성에스디아이 주식회사 | Pouch type Li Secondary Battery and Method of fabrcating the same |
JP4559406B2 (en) | 2005-12-29 | 2010-10-06 | 三星エスディアイ株式会社 | Pouch-type battery |
KR100719736B1 (en) | 2005-12-29 | 2007-05-17 | 삼성에스디아이 주식회사 | Pouch type lithium rechargeable battery and method of making the same |
KR20080025437A (en) | 2006-09-18 | 2008-03-21 | 주식회사 엘지화학 | Secondary battery capable of adjusting position of electrode terminal and having improved safety |
JP2008109075A (en) * | 2006-09-26 | 2008-05-08 | Bridgestone Corp | Electric wave absorbing material |
KR100891383B1 (en) * | 2007-05-21 | 2009-04-02 | 삼성에스디아이 주식회사 | Pouch type secondary battery |
-
2011
- 2011-07-01 US US13/175,292 patent/US8709645B2/en active Active
-
2012
- 2012-06-29 TW TW101123632A patent/TWI453118B/en not_active IP Right Cessation
- 2012-06-29 CN CN201210294846.1A patent/CN102848646B/en active Active
-
2014
- 2014-03-18 US US14/217,972 patent/US20140196839A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040110068A1 (en) * | 2001-06-07 | 2004-06-10 | Mitsubishi Chemical Corporation | Lithium secondary cell |
US20040038125A1 (en) * | 2002-06-17 | 2004-02-26 | Samsung Sdi Co., Ltd. | Reinforced pouch type secondary battery |
JP2008021634A (en) * | 2006-07-10 | 2008-01-31 | Lg Chem Ltd | Secondary battery with security of sealing part improved |
US20100003594A1 (en) * | 2008-07-01 | 2010-01-07 | Samsung Sdi Co., Ltd. | Pouch-type lithium secondary battery |
Non-Patent Citations (1)
Title |
---|
Machine translation of JP 2008021634 A relied upon in the rejection (01-2008) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11611132B2 (en) | 2017-05-10 | 2023-03-21 | Apple Inc. | Battery cap with cut-out sections |
Also Published As
Publication number | Publication date |
---|---|
TW201304950A (en) | 2013-02-01 |
US20130004835A1 (en) | 2013-01-03 |
CN102848646A (en) | 2013-01-02 |
TWI453118B (en) | 2014-09-21 |
CN102848646B (en) | 2015-09-16 |
US8709645B2 (en) | 2014-04-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8709645B2 (en) | Battery pouch sheet edge insulation | |
US10141553B2 (en) | Secondary battery and battery module having the same | |
US9077027B2 (en) | Electrode assembly and secondary battery using the same | |
KR100496305B1 (en) | Pouched-type lithium secondary battery and the fabrication method thereof | |
US9741974B2 (en) | Battery cell having round corner | |
JP5113219B2 (en) | Secondary battery | |
US9450217B2 (en) | Pouch battery and manufacturing method thereof | |
US20120219847A1 (en) | Pouch type battery and its manufacturing method | |
US9412978B2 (en) | Pouch type battery | |
KR101508416B1 (en) | Pouch-type secondary battery | |
CN106803553B (en) | Rechargeable battery | |
US10355262B2 (en) | Electrode assembly and battery pack having the same | |
US20140302384A1 (en) | Secondary battery and method of insulating outer surface of secondary battery | |
US11245147B2 (en) | Pouch-type secondary battery having unsealed portion | |
CN105684183A (en) | Pouch-type battery cell comprising film member for protecting electrode lead-electrode tap joint | |
KR20140094205A (en) | Rechargeable battery | |
KR20140050293A (en) | Frame for pouch type secondary battery, battery pack having the same and manufacturing method thereof | |
KR102540149B1 (en) | Secondary Battery | |
CN113745744A (en) | Solid battery module and solid battery monomer | |
KR102512060B1 (en) | Rechargeable battery | |
KR101308242B1 (en) | Pouch type secondary battery | |
KR20140061153A (en) | Pouch type secondary battery and device comprising the same | |
KR101436641B1 (en) | Secondary battery comprising vacuum water-blocking part and method of producing the same | |
KR20040107868A (en) | Pouched-type lithium secondary battery | |
KR20170022372A (en) | Secondary Battery And Fabricating Method Thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE |