KR20030014351A - Battery packaging - Google Patents

Abstract

A rechargeable lithium battery is disclosed that includes a first laminate having a perimeter and a central portion and a second laminate having a peripheral and a central portion. The first and second laminates include a metal foil, an outer polymer layer bonded to one side of the metal foil, and a hot melt polymer coating on the other side of the metal foil at least at the periphery of the metal aluminum foil. The metal foil is in particular an aluminum foil. The first and second laminates are sealed together with a hot melt polymer coating at the periphery of the metal foil. The central chamber is formed by the central portion of the first and second laminates. In the central chamber the anode, cathode and electrolyte are arranged in a current conducting manner. Two electrically conductive connector strips are positioned between the two perimeters. The connector is aluminum, copper or nickel. One end of one connector is connected to the positive electrode and one end of the other connector is connected to the negative electrode. The remaining ends of the two connectors extend beyond the perimeter of the laminate.

Description

Battery Packaging {BATTERY PACKAGING}

Lithium-ion batteries are currently packaged in rigid aluminum shells formed through impact molding or deep drawing. These hard shells are laser welded to keep the liquid electrolyte in the container and to prevent exposure of the shell's chemical components to moisture and other gases that negatively impact battery performance. Such casings are expensive to manufacture and are available from a limited company and are limited in shape and available forming factors. For example, the thickness of a case of less than 6 millimeters is not available.

Excessive price, size, shape and thickness limitations have led battery developers to seek new ways to protect and contain Li-ion and Li-Polymer batteries. The use of flexible aluminum-plastic laminates has been introduced. The low cost, moldability that these laminates provide deep cavities, wide availability and high protection against moisture and gases have made these materials preferred. In addition, sizes such as length, width and thickness can be easily changed to increase the preference of these materials. Metal shell enclosures for current batteries are heavier and thicker than the present invention. These properties, weights and thicknesses are key to new battery designs that need to be housed in small devices such as cell phones, laptop computers, palmtop computers, notebook computers and cameras. In particular, weight and size determine the preferences of the end purchaser. In addition, battery performance is another deciding factor in selling these products.

Over the years, new laminates have been designed for these applications. These laminates, such as rectangular, straight wall shaped cavities, three-sided porch type structures, or pin-seal type porches that will accommodate battery bi-cells, are designed for low temperature molding and such shapes are known in the packaging art. These materials have several common features.

They contain aluminum foil as a barrier to light and other gases such as moisture and oxygen and prevent the liquid electrolyte from evaporating from the battery over time. Small modifications were made from the type first marketed by Alusuisse Flexible Packaging in 1992. The latter consists of:

Moldable Unmoldable

oPA, 25 μm external PET, 12 μm

Adhesive

Aluminum foil, aluminum foil,

45-60㎛ 10-60㎛

Tie floor

PET or oPA, PET, 12 μm

12-25㎛

Tie floor

Sealant, 50 μm Internal Sealant, 50 μm

Over time, in parallel with battery technology development, the thickness of the tie layer, sealant and foil was changed in a limited manner and the sealant composition and tie layer improved. The choice of sealant depends on the chemistry of the battery and electrolyte and the process used to produce acrylic acid-modified polyethylene and polypropylene. The tie layer also depends on the sealant, the electrolyte, the packaging type used between the epoxy-urethane or aliphatic polyester type adhesive, the extended tie layer of acrylic acid modified polyethylene and maleic anhydride modified polypropylene.

The thickness of the sealant and the presence of intermediate films such as PET (polyethylene terephthalate) or oPA (oriented polyamide) film inside the structure are designed for the relevant connector thickness. The connector is a metal strip made of nickel, copper, aluminum or stainless steel. The connector is sealed between two sides of the package (top and bottom for formed cavities, front and back for porch-shaped packages). A connector called a tab connects the positive and negative poles from the battery to the outside.

The tap area is the most complicated part of the battery shell. In the case of current aluminum hard shells, aluminum-plastic laminates must provide a hermetic seal around the tab to prevent electrolyte from moving out of the shell. At the same time, the ingress of water along the same tap must be prevented.

Intermediate plastic films, such as oPA films or PET films, prevent the sealant material from being squeezed in the tab area to the extent that the tab contacts the aluminum foil of the package when sealed. At this moment, the battery is shorted. oPA films or PET films are not compressible at the temperatures used to seal PP (polypropylene) and PE (polyethylene), preventing tabs from contacting the foil. Sealant films or extrusions are designed to seal tabs in various thickness ranges, but the tabs typically have a thickness of 50-80 microns and produce very thick hermetic seals. Sealants also have to be very thick, which has some obvious drawbacks.

The state-of-the-art material is therefore thick because of sealant materials consisting of heat- and pressure-resistant inner films such as oPA films and PET films and polypropylene or polyethylene copolymers. The purpose of the new battery design is to minimize the size and weight of such batteries. In the case of the formed cavity, the wall formed in order to maximize the battery bi-cell volume is as straight as possible. Laminates used as shells to protect the bi-cell and contain the electrolyte should be as thin as possible. The state-of-the-art materials are quite thick, occupying a large volume, heavy and valuable space.

The seal is folded down or along the body of the porch at the bottom formed to reduce the size of the sealed and finished battery. In modern materials these folded seals take up a considerable amount of space due to the thick nature of the packaging material. Due to the size of the folded seal, the volume left for the battery is greatly reduced.

The amount of electrolyte absorbed by the grafted or copolymerized polypropylene or polyethylene sealant is significant and over time the electrolyte evaporates. Typical electrolytes include strong organic solvents such as alkyl carbonates such as ethyl carbonate, dimethyl carbonate, ethyl methyl carbonate and the like. Such solvents are soluble in modern laminate layers. Thus, over time, the bond strength of the electrolytes found in sealants, PET and oPA films and tie layer solutions decreases, electrolytes evaporate slowly at the seal edges and the battery dries. These batteries are cycled between a high temperature of about 120 ° C. for a short time, 85 ° C. for long tests, and between 60 ° C. and 95 ° C. for a long time.

When tested at 60 ° C. for an extended period of time, electrolyte losses can be high with modern packages. In addition, some of the latest laminate materials tend to crack at the corners of the cavity formed due to lack of formability. The cavities formed require almost right angle wall angles (typically less than 4 degrees), which is a significant stress on the material. The lack of molding performance is usually associated with the wrong choice of aluminum alloys or PET or polyamide films. Cracking the aluminum foil by the molding process sacrifices barrier battery protection such as preventing electrolyte evaporation or preventing moisture from entering the package.

The main drawback of known packaging laminates is that the tab areas are very difficult to hermetically seal with such laminates. These bad seals lead to corrosion of the battery and tab due to electrolyte leakage and moisture ingress. In any case, battery life and performance are sacrificed. This difficulty arises from the need for the sealant material to be compressed during heat sealing from a flat and homogeneous finish along the edge of the tab. During heat sealing, the sealant should flow and close the gaps in the tab edges. This risks compressing the sealant material too much or too little alongside the tab. In either case, the seals are weakened, causing leaks and movement, which results in loss of battery performance. The sealant material is a web or extrudate as an integral part of the laminate and therefore cannot be used in varying amounts in the tab area. Therefore, taps of various thicknesses or sizes are possible simply by changing the sealant thickness. The drawback of this method is that the sealant is thick everywhere else along the battery seal. Sealants in these areas are not necessary in this amount because they contribute to moisture and electrolyte migration. The sealant should be as thin as possible along with battery seals that do not include tabs and seal as much moisture and electrolyte as possible. The heat resistant film provided inside the structure prevents the tabs from contacting the aluminum foil of the package during heat sealing. However, these films are also not good barriers to water or electrolytes and thus contribute to the movement of water or electrolytes. PET or oPA are not considered by those of ordinary skill in the art to be high barrier materials for water vapor or electrolytes. The present invention shows that these materials can be removed while improving the seal performance of the barrier and tab.

All tab sizes and thicknesses require different laminate materials for more or less complete sealing of the tabs. This is a very expensive method and the volume associated with the battery or tab size is small and therefore economically impossible.

General description of the invention

It is an object of the present invention to provide batteries and battery packaging such as lithium ion or lithium polymer batteries with improved connector sealing and improved barrier performance against water vapor intrusion and electrolyte migration. It is yet another object of the present invention to provide a battery packaging having a seal and a thinner laminate that folds more easily than known batteries and a battery such as a lithium ion or lithium polymer battery. It is yet another object of the present invention to provide a battery packaging and a battery, such as a lithium ion or lithium polymer battery, which provides a more safe product with improved heat resistance to high temperatures. It is still another object of the present invention to provide a battery packaging that is smaller in size and lighter than a known battery, and a battery such as a lithium ion or lithium polymer battery. Yet another object of the present invention is to provide a battery packaging that does not delaminate over time and a battery such as a lithium ion or lithium polymer battery. Still another object of the present invention is to provide a battery packaging and a battery manufacturing method such as a lithium ion or lithium polymer battery.

The object of the present invention is achieved by battery packaging and a battery such as a lithium ion or lithium polymer battery and a method of manufacturing the same.

The present invention relates to batteries and their packaging, such as improved lithium-ion or lithium polymer batteries. The thickness of the lithium ion battery of the present invention is 6 1/2 mm or more. The new packaging allows for a thinner material so the battery of the present invention can be as thin as a credit card.

In particular, the present invention relates to a rechargeable battery comprising a first laminate having a perimeter and a central portion and a second laminate having a perimeter and a central portion. The first and second laminates comprise a metal foil, an outer polymer layer bonded to one side of the metal foil, and a hot melt polymer coating on the other side of the metal foil at least at the periphery of the metal foil. The metal foil is in particular an aluminum foil. . The first and second laminates are sealed together with a hot melt polymer coating at the periphery of the metal foil. In the central chamber the anode, cathode and electrolyte are arranged in a current conducting manner. Two electrically conductive connector strips are positioned between the two perimeters. The connector is aluminum, copper or nickel. One end of one connector is connected to the positive electrode and one end of the other connector is connected to the negative electrode. The remaining ends of the two connectors extend beyond the perimeter of the laminate. Hot melt polymers form an airtight seal around the tab to prevent electrolyte leakage and moisture ingress.

Hot melt polymers have different physical properties from sealant polymers. Hot melts have a lower viscosity than the sealant materials at melting temperatures.

In particular, the present invention relates to rechargeable battery packaging comprising a first laminate having a perimeter and a central portion and a second laminate having a perimeter and a central portion. The first and second laminates include a metal foil, an outer polymer layer bonded to one side of the metal foil, and a hot melt polymer coating on the other side of the metal foil at least at the periphery of the metal foil. The metal foil is in particular an aluminum foil. The first and second laminates are sealed together with a hot melt polymer coating at the periphery of the metal foil. In the central chamber the anode, cathode and electrolyte are arranged in a current conducting manner. Two electrically conductive connector strips are positioned between the two perimeters. The connector is aluminum, copper or nickel. One end of one connector is connected to the positive electrode and one end of the other connector is connected to the negative electrode. The remaining ends of the two connectors extend beyond the perimeter of the laminate. Hot melt polymers form an airtight seal around the tab to prevent electrolyte leakage and moisture ingress.

It is an object of the present invention to solve the problem of the thickness of the packaging laminate and the airtight sealing of the tab to prevent battery leakage and damage, providing a more rigid material for the molding process and reducing electrolyte loss through the seal. Thinner and less expensive laminates can be used where no molding process is required. In both cases hotmelt is used to provide a hermetic seal around the tab. The materials of the present invention provide higher heat resistance at high temperatures that the battery may experience, resulting in a safer product.

The present invention provides maximum flexibility in sealing various tab sizes and thicknesses by varying the amount and position of the hot melt material. The remainder of the package provides a seal with minimal sealant material to minimize moisture and electrolyte migration. However, the amount of hot melt should be kept to a minimum in order to minimize the migration of electrolyte and water while minimizing thickness, size and cost. Hotmelts are designed to provide maximum resistance to the electrolyte and minimal absorption or solubility in the electrolyte. Hotmelts are selected from materials with high moisture barrier performance and low water solubility. The hotmelt is made from the same series of resins as the sealant material of the laminate to provide strong welding with the package when the tab and hotmelt are sealed together.

Hotmelts are applied in various sequences at various points in the battery assembly. Hotmelt may be applied on the tabs of the battery before or after introducing the battery into the package. In the case where the package is a cavity, after forming, if the package is in the form of a porch, the hot melt may be applied directly onto the packaging material after folding.

The hotmelt is applied using a gear pump unit from a heated tank containing hotmelt and dispensed through the nozzle to the required position. The principle of hot melt application is known.

The hotmelt material is designed with the same organic polymer as the laminate sealant constituent polymer so that the melting points of the two materials are close. This allows the hot melt to be applied on the packaging material or on the battery tab to cool to a solid state. The tabless side seal is sealed under conventional heat, pressure and time when the battery is finally assembled into the package to heat seal the package. Hotmelt is applied and packaged areas with tabs protruding through the package seal are also sealed under the same heat, pressure and time. The hot melt is reactivated by heat and pressure to combine with the packaging material and the tab, and when melted by heat and pressure it closes the sides of the tab to ensure the seal is completely sealed. Similar properties of package sealants and hot melts allow heat sealing under the same heat, pressure and time as side seals. When the sealing inlet is opened, the material cools and the sealant material and hot melt solidify with a very strong seal. These seals are mechanically strong and resist mechanical and thermal stresses over battery life.

Electrolyte (or electrolyte conductor) means a conductive medium in which the current flow is in mass transfer in the form of ions. The conductive medium is a liquid or a paste.

Lithium-ion batteries use liquid (non-aqueous) electrolytes. The negative electrode is graphite or other carbon material that may contain lithium ions. The positive electrode is a lithium compound or alloy such as LiCoO ₂ .

Lithium polymer batteries use a paste electrolyte that is an oxide mixture containing one or more oxides.

The present invention addresses primary batteries and secondary batteries such as lithium polymer batteries and lithium ion batteries. Lithium ion and polymer batteries are rechargeable.

The present invention relates to a rechargeable lithium battery comprising a first laminate having a perimeter and a central portion and a second laminate having a perimeter and a central portion. The first and second laminates include a metal foil, an outer polymer layer bonded to one side of the metal foil, and an inner polymer sealant layer on the other side of the metal foil. The first and second laminates are sealed together with an inner polymer sealant layer at the periphery of the metal foil. The central chamber is formed by the central portion of the first and second laminates. In the central chamber, an anode, a cathode of a lithium compound or an alloy, and an electrolyte are arranged in a current conducting manner. Two electrically conductive connector strips are positioned between the two perimeters. The connector is aluminum, copper or nickel. One end of one connector is connected to the positive electrode and one end of the other connector is connected to the negative electrode. The remaining ends of the two connectors extend beyond the perimeter of the laminate. The hotmelt polymer is located in a hermetic manner around and around the connector area between the connector and the periphery of the sealant layer. Hot melt polymers form an airtight seal around the tab to prevent electrolyte leakage and moisture ingress.

The metal foils are aluminum, low temperature annealed aluminum alloy foils, copper foils, low temperature annealed copper alloy foils or nickel. The lithium battery may be a lithium polymer battery in which the metal foil is aluminum. The lithium battery may be a lithium ion battery. The metal foil may be an aluminum foil having a thickness of 5-100 μm. The aluminum foil may be a low temperature annealed aluminum foil.

The inner polymer sealant layer may be maleic anhydride grafted polypropylene, epoxy-propylene system, propylene, acrylic acid modified propylene, polyethylene, polyamide, polyester or urethane. The inner polymer sealant layer may have a thickness of 5-100 μm. The inner polymer sealant layer has a melting point of at least 90 ° C, in particular at least 120 ° C.

The hotmelt polymer may be maleic anhydride grafted polypropylene, epoxy-propylene system, propylene, acrylic acid modified propylene, polyethylene, polyamide, polyester or urethane. Hotmelt polymers have a melting point above 90 ° C., in particular above 120 ° C., similar to the inner polymer sealant layer. The hotmelt polymer may be a coating over the entire surface of the inner polymer sealant layer.

The outer polymer layer can be polyester, polyamide or polypropylene. The outer polymer layer may have a thickness of 8-50 μm. The outer polymer layer can be biaxially oriented polyamide, polyester or polypropylene. The outer polymer layer can be bonded to the metal foil by means of an adhesive layer or tie layer. The adhesive layer may be a solvent based or solventless urethane based adhesive, a polyester based adhesive or an epoxy based one or two component adhesive. The tie layer may be polyethylene, acrylic acid modified polyethylene or polypropylene.

The lithium battery may have a porch-shaped, rectangular (prism) right-angled wall cavity or may be a three-sided or pin-seal type porch.

The present invention relates to a rechargeable lithium battery comprising a first laminate having a perimeter and a central portion and a second laminate having a perimeter and a central portion. The first and second laminates include an aluminum foil, an outer polymer layer bonded to one side of the aluminum foil, and an inner polymer sealant layer on the other side of the aluminum foil. The first and second laminates are sealed together with an inner polymer sealant layer at the periphery of the metal foil. The central chamber is formed by the central portion of the first and second laminates. Two electrically conductive connector strips are positioned between the two perimeters. The connector is aluminum, copper or nickel. In the central chamber the end of one connector is connected to the positive pole and the other end of the other connector is connected to the negative pole. The remaining ends of the two connectors extend beyond the perimeter of the laminate. The hotmelt polymer is located in a hermetic manner around and around the connector area between the connector and the periphery of the sealant layer. Hot melt polymers form an airtight seal around the tab to prevent electrolyte leakage and moisture ingress.

The present invention relates to a rechargeable lithium battery comprising a first laminate having a perimeter and a central portion and a second laminate having a perimeter and a central portion. The first and second laminates include an aluminum foil, an outer polymer layer bonded to one side of the aluminum foil, and a hot melt polymer coating on the other side of the aluminum foil at least at the periphery of the aluminum foil. The hotmelt polymer coating at the periphery of the first and second laminates is sealed together. The central chamber is formed by the central portion of the first and second laminates. In the central chamber, there are a cathode, an anode, a lithium compound or an alloy, and an electrolyte in a current conducting manner. Two electrically conductive connector strips are positioned between the two perimeters. The connector is aluminum, copper or nickel. In the central chamber the end of one connector is connected to the positive pole and the other end of the other connector is connected to the negative pole. The remaining ends of the two connectors extend beyond the perimeter of the laminate. Hot melt polymers form an airtight seal around the tab to prevent electrolyte leakage and moisture ingress.

The lithium battery may be a lithium polymer battery or a lithium ion battery. The metal foil may be an aluminum foil having a thickness of 5-100 μm. The aluminum foil may be a low temperature annealed aluminum foil.

The inner polymer sealant layer may be maleic anhydride grafted polypropylene, epoxy-propylene system, propylene, acrylic acid modified propylene, polyethylene, polyamide, polyester or urethane. The inner polymer sealant layer may have a thickness of 5-100 μm. The inner polymer sealant layer has a melting point of at least 90 ° C, in particular at least 120 ° C.

The hotmelt polymer may be maleic anhydride grafted polypropylene, epoxy-propylene system, propylene, acrylic acid modified propylene, polyethylene, polyamide, polyester or urethane. Hotmelt polymers have a melting point above 90 ° C., in particular above 120 ° C., similar to the inner polymer sealant layer.

The outer polymer layer can be polyester, polyamide or polypropylene. The outer polymer layer may have a thickness of 8-50 μm. The outer polymer layer can be biaxially oriented polyamide, polyester or polypropylene. The outer polymer layer can be bonded to the metal foil by means of an adhesive layer or tie layer. The adhesive layer may be a solvent based or solventless urethane based adhesive, a polyester based adhesive or an epoxy based one or two component adhesive. The tie layer may be polyethylene, acrylic acid modified polyethylene or polypropylene.

The lithium battery may have a porch-shaped, rectangular (prism) right-angled wall cavity or may be a three-sided or pin-seal type porch.

The present invention relates to a lithium battery packaging comprising a first laminate having a perimeter and a central portion and a second laminate having a perimeter and a central portion. The first and second laminates include an aluminum foil, an outer polymer layer bonded to one side of the aluminum foil, and a hot melt polymer coating on the other side of the aluminum foil at least at the periphery of the aluminum foil. The hotmelt polymer coating at the periphery of the first and second laminates is sealed together. The central chamber is formed by the central portion of the first and second laminates. In the central chamber, there are a cathode, an anode, a lithium compound or an alloy, and an electrolyte in a current conducting manner. Two electrically conductive connector strips are positioned between the two perimeters. In the central chamber the end of one connector is connected to the positive pole and the other end of the other connector is connected to the negative pole. The remaining ends of the two connectors extend beyond the perimeter of the laminate. Hot melt polymers form an airtight seal around the tab to prevent electrolyte leakage and moisture ingress.

To avoid shorting the battery, the laminate metal foil in the seal area must be non-conductive or if the inner surface of the laminate metal foil is not completely covered with a sealant coating or a hot melt polymer coating, or the sealed edges of the laminate must be non-conductive polymer or other material. Should be covered with.

The lithium ion and lithium polymer batteries of the present invention are so small (thin) that cell phones, laptop computers, cameras, palmtop computers, notebook computers, electric shavers, cordless phones, portable mini pagers, phone cards, garage door openings, baby monitors, Wireless microphones, can be used in portable electronics. Batteries of the present invention include another battery using an alternative chemical system. The battery of the invention may comprise a solid state lithium battery (ie non-liquid or paste electrolyte).

The outer polymer layer of the laminate of the invention is a polyamide, polyester or polypropylene film / layer.

The outer polymer layer of the laminate of the present invention may consist primarily of polyamide based thermoplastics. Polyamide-based thermoplastics are polyamide 6, which is a homopolymer of ε-caprolactam (polycaprolactam); polyamide 11, polyamide 12, which is a homopolymer of ω-laurin lactam (polylaurin lactam); Polyamide 6.6 which is a homo-poly-condensate of hexamethylene-diamine and adipic acid (polyhexamethyleneadipamide); Polyamide 6.12, which is a homo-poly-condensate of hexamethylene-diamine and dodecanoic acid (polyhexamethylenedodecanamide); Polyamide 6-3-T, which is a homo-poly-condensate of polymethylhexamethylene-diamine and terephthalic acid (polytrimethylhexamethyleneterephthalamide). Polycaprolactam is preferred.

The outer polyamide layer comprises a polyamide, a polyamide mixture or a monofilm or layer composed of hybrid, block, grafted or co-polyamides or a composite of two or more layers.

However, the outer polyamide layer may be present as a monofilm or a composite.

The outer polyamide layer includes additives such as stabilizers, softeners, fillers, pigments and the like.

The outer polyamide layer can be uniaxially or biaxially stretched. The outer polyamide layer may contain elongated polyamide based thermoplastics. Uniaxial, in particular biaxially stretched, polyamide films are preferred.

The flow regime of the outer polyamide layer in the form of a film, in particular a biaxially stretched polyamide film, is useful if possible isotropic.

Furthermore, the preferred outer polyamide film is one that exhibits a flow regime that results in high strain hardening degrees. High strain hardening is evidence of an increase in film stress in the transverse and longitudinal directions with increasing elongation.

Particularly suitable polyester, polyamide or polypropylene layers have a high R value of at least one. The R value indicates whether the material yields from the width or thickness of a particular film. An R value of at least 1 indicates that the material yields from the width of the sample.

Preferred films include biaxially oriented polypropylene, in particular polyamide or polyester films having a tensile strength of at least 150 MPa in both directions, even more than 200 MPa.

The film break elongation is at least 40%, in particular at least 50%. Tensile strength in the 5-15% elongation range is 40-120 MPa, especially 50-100 MPa.

The metal foil or layer of the moldable laminate of the present invention may be iron, steel or copper. Preferred metal foils are aluminum or aluminum alloys. The metal layer is preferably aluminum having a purity of at least 98.6%, in particular at least 99.2% and even at least 99.5%. Aluminum alloys of type AA8079, AA8101 or AA8021 are advantageous, for example.

Low temperature annealed fine granules or microstructured aluminum thin films, ie continuous metal layers without perforations, cutouts or discontinuities, in particular tapes having at least five, in particular seven grain layers above the tape thickness, are preferred as metal layers.

The surface of the metal, in particular the aluminum layer, is homogeneous with no residual grease and has a defined surface. The aluminum surface is treated with lacquers based on epoxides or phenols or with conversion layers such as hybrid oxides or hydrate layers. In addition, the surface can be pretreated by corona discharge.

Laminate adhesives are used to bond the outer polymer film to the aluminum foil. The laminate adhesive is applied to the adhesive surface by lacquer lamination.

The adhesive is a vinylpyridine polymer, butadiene-acrylonitrile-methacrylic acid copolymer, phenolic resin, rubber derivative in combination with vinyl chloride copolymer, vinyl chloride-vinylacetate copolymer, polymerizable forester, vinylpyridine polymer, epoxy resin. And organic silicone compounds such as acrylic resins, or organosilanes in combination with acrylic resins, phenols, epoxy resins or acrylate copolymers.

Organosilanes are preferred. Examples thereof include alkyltrialkoxysilane having an amino group, alkyltrialkoxysilane having an epoxy group, alkyltrialkoxysilane having an ester group, alkyltrialkoxysilane having an aliphatic functional group, alkyltrialkoxysilane having a glycidoxy functional group and methacryloxy Alkyltrialkoxysilane which has a functional group is included. Examples of such organosilanes are γ-aminopropyltriethoxysilane and N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane, γ- (3,4-epoxycyclohexyl) ethyltrimethoxysilane , γ-glycidoxypropyltrimethoxysilane, and γ-methacryloxypropyltrimethoxysilane.

Suitable adhesion promoters are nitrile rubber-phenolic resins, epoxides, acrylonitrile-butadiene rubbers, urethane-modified acrylics, polyester co-polyamides, hot melt polyesters, polyisocyanates crosslinked with hot melt polyesters, polyisobutyl Adhesives such as styrene-modified styrene-butadiene rubbers, polyurethanes, ethylene-acrylic acid interpolymers and ethylene-vinylacetate interpolymers.

Polyurethanes are particularly preferred. Depending on the type, adhesives are used in the form of aqueous solutions, organic solvents, and solvent-free forms.

In general, the adhesive layer is maintained at a thickness of 1-12 μm, in particular 1.5-9 μm. Instead of the layer thickness, the amount of adhesive between the outer polymer film and the metal foil arranged adjacent to the metal layer can be expressed as the amount of laminated adhesive. The amount is 1.0-14 g / m ² , in particular 1.5-9 g / m ² , further 1.5-6 g / m ² . This amount is given without solvent. The outer polymer film is heat-laminated on the aluminum surface.

Polypropylene sealants are polyolefin materials such as atactic or isotactic polypropylene. Grafting of the functional groups on the base polyolefin material is performed to promote adhesion to the metal. Grafting of maleic anhydride to polypropylene is a typical modification to promote adhesion to metals.

The present invention relates to a battery such as a lithium ion battery and a battery manufacturing method such as a lithium ion, lithium polymer and lithium metal battery. The present invention also relates to the packaging of batteries such as lithium ion batteries and methods of manufacturing battery packaging such as lithium ion, lithium polymer and lithium metal batteries.

1 is a plan view of a known lithium ion battery.

2 is a side cross-sectional view taken along line 2-2 of FIG.

3 is a longitudinal cross-sectional view taken along 3-3 of FIG.

4 is a cross-sectional view of the tab region of the known battery of FIG.

5 is a plan view of the present invention lithium ion battery.

6 is a side cross-sectional view taken along 6-6 of FIG.

7 is a longitudinal sectional view taken along line 7-7 of FIG.

8 is a cross-sectional view of the tab region of the battery of the invention 5.

FIG. 9 is another longitudinal cross sectional view of the known battery tab region compared to FIG. 10; FIG.

FIG. 10 is another longitudinal cross sectional view of the battery tab area of the present invention compared to FIG.

11 is a perspective view of a pin-seal type porch-version of the present invention lithium ion battery.

12 is a side cross-sectional view along 12-12 of the FIG. 11 central chamber region.

Figure 13 is a partial perspective view of the battery non-tab end of the present invention.

14 is an end view of the battery of the invention of FIG.

Figure 15 is a partial perspective view of the battery tab end of Figure 11 of the present invention.

16 is a side cross-sectional view along 16-16 of the battery tab region of FIG.

Figure 17 is a plan view of the porch-version of the present invention lithium ion battery.

18 is a side view of the battery of the present invention.

19 is a front view of the battery of the present invention.

* Symbol description *

Lithium-ion battery

101 Polyethylene terephthalate or oriented polyamide (oPA) film

102 Urethane Adhesive Layer 103 Aluminum Foil

104 Urethane or Acrylic Acid Modified Polyethylene (EAA) Layer

105 ... polyethylene terephthalate film

106 ... Polypropylene (PP) or Acrylic Acid Modified Polyethylene Sealant Layer

107 ... tab 108 ... by-cell

109 ... side seal area 110 ... tab seal

111 Peripheral 112 Central chamber

113 Front seal area 114 Projection

115 ... aluminum wire 116 ... lower laminate

117 Top laminate 118,121,124,132 Lithium-ion battery

119,120,123 ... laminate 125,133 ... porch body

126 Pin-seal area 127 Front tab seal

128.Front pin-seal 129 ... Rear seal

130.Rear fin-seal131 Hot melt polymer

134 ... tab seal area 135 ... side seal area

136 Central chamber 137 Laminate

150 ... hot melt polymer

Materials used in combination with hotmelts to seal the tabs provide new and improved packages for lithium based batteries. The present invention provides a lightweight package that prevents leakage of electrolyte and provides impermeability to moisture and oxygen (applied in the case of laminates and hot melts). Sealing the tab in place and forming a hermetic seal is a novel aspect of the present invention.

By adjusting the amount and placement of hot melts without changing the material, tabs of various thicknesses and sizes can be easily accommodated.

Another advantage of the present invention is a thinner and lighter material, which minimizes the size and weight of the battery. These materials also provide a seal that is easier to bend to a smaller radius than known techniques in order to minimize the overall size of the battery.

Sealant materials and hot melt materials are for example:

Maleic anhydride grafted polypropylene (preferred polymer)

Epoxy-polypropylene system

Polypropylene

Acrylic acid modified polyethylene (referred to as EEA)

Polyethylene

Polyamide

-Polyester

The thickness of the sealant is 5-100 μm, in particular 5-50 μm, even more 5-20 μm.

The choice of sealant is focused on materials that have a melting point higher than the temperature at which the battery is exposed (such as 120 ° C.) and are resistant to electrolytes at high temperatures.

The choice of hotmelt polymer should have a similar chemistry and melting point as the sealant so that the laminate easily seals and seals the sides of the tab.

Sealant materials and hotmelts are selected to minimize electrolyte losses and moisture migration that are critical to battery performance. Therefore, a thin sealant and a minimum amount of hot melt are recommended to limit movement.

Another important factor is that the present invention provides a package which does not result in delamination over time as compared to known laminates. Known materials are sensitive to chemical degradation over time, and over time creep occurs that delaminates part of the structure and is exposed to battery movement. The present invention is free of delamination and battery movement exposure.

Hotmelts are advantageously used as pin-seal type porches on the tab side and pin-bonds the end-seal by filling the material overlap, which is a weak seal that is difficult to perform in a pouching machine on the opposite side.

As far as the metal layer is concerned, there is a difference depending on whether the material is moldable.

Moldable Material

Low temperature annealed aluminum alloy with a purity of over 98.6%

-10-100 μm, especially 20-70 μm, even 25-60 μm gauges (reduced to 45 μm but easy to 60 μm)

The metal is low temperature annealed copper or copper alloy or nickel.

Non-moldable material

Low temperature annealed aluminum with a purity above 98.6%

-5-100 μm, especially 10-50 μm, even 10-30 μm gauge (reduced to 25 μm)

The metal is low temperature annealed copper or copper alloy or nickel.

In the case of moldable structures the preferred material is biaxially oriented polyamide 6 having a gauge of 10-100 μm, in particular 10-50 μm, even 10-30 μm (actual reduction is a 25 μm biaxially oriented polyamide) or 6.6. Other materials, such as biaxially oriented polyester or polypropylene, can be used in the same thickness range.

The outer layer can be bonded to the metal through an adhesive layer, which can be a urethane base, polyester base, epoxy base monocomponent or bicomponent adhesive (solvent based or solventless). The outer layer can be bonded to the metal in an extruded tie layer made of modified polyethylene or polyethylene, such as acrylic acid modified polyethylene. Preferred materials for non-moldable structures are biaxially oriented polyester films, biaxially oriented polyamides, or id-axis oriented polypropylenes. The gauge (thickness) is 10-100 μm, in particular 10-50 μm, even more 10-30 μm (example is 12 μm biaxially oriented polyester).

Laminates of non-molding structures are more elastic than moldable rnh.

1-4 show a known lithium ion battery 100. 1 is a plan view of a lithium ion battery 100 having two metal tabs 107 extending beyond a periphery 111 that encloses a central chamber 112. The periphery 111 includes a front seal region 113 and side and back seal regions 109. 2 is a side cross-sectional view of the lithium ion battery 100. The bi-cells 108 accumulated in the central chamber 112 are shown. The electrolyte is contained in the central chamber 112. The side seal area 109 is bent over the area 114 and folded down completely in the actual battery assembly. 3 is a longitudinal cross-sectional view of the lithium ion battery 100. The aluminum tab 107 extends through the front seal area 113 and connects with the bi-cell 108 accumulated by the aluminum lead 115. The central chamber 112 is formed in the lower laminate 116 and covered with the upper laminate 117. Anterior seal region 113 and lateral and back seal regions 109. In FIG. 4 the upper laminate 117 is constructed from the outer layer to the inner layer as follows:

101 Polyethylene terephthalate or oriented polyamide (oPA) film

102 ... urethane adhesive layer

103 ... aluminum foil

104 Urethane or Acrylic Acid Modified Polyethylene (EAA) Layer

105 ... polyethylene terephthalate film

106 ... Polypropylene (PP) or Acrylic Acid Modified Polyethylene Sealant Layer

In Figure 4, the bottom laminate 116 is constructed from the outer layer to the inner layer as follows:

106 ... Polypropylene (PP) or Acrylic Acid Modified Polyethylene Sealant Layer

105 ... polyethylene terephthalate film

104 Urethane or Acrylic Acid Modified Polyethylene (EAA) Layer

103 ... aluminum foil

102 ... urethane adhesive layer

101 Polyethylene terephthalate or oriented polyamide (oPA) film

In FIG. 4, the aluminum tab 107 is bonded between the upper laminate 117 and the inner sealant layer 106 of the lower laminate 116 (tab seal 110). Seals around tab 107 tend to leak electrolyte and introduce moisture.

5-8 show a lithium ion battery 118 of the present invention. 5 is a plan view of a lithium ion battery 118 having two metal tabs 107 extending beyond the periphery 111 surrounding the central chamber 112. The periphery 111 includes a front seal region 113 and side and back seal regions 109. 6 is a side cross-sectional view of the lithium ion battery 118. The bi-cell 108 is shown accumulated in the central chamber 112 (having a rectangular horizontal cross section). The electrolyte is contained in the central chamber 112. The side seal area 109 bends over the area 114 and folds down completely in the actual battery assembly. 7 is a longitudinal cross-sectional view of the lithium ion battery 118. The aluminum tab 107 extends through the front seal area 113 and connects with the bi-cell 108 accumulated by the aluminum lead 115. The central chamber 112 is formed in the lower laminate 119 and covered with the upper laminate 120. Anterior seal region 113 and lateral and back seal regions 109. In FIG. 8 the upper laminate 120 is constructed from the outer layer to the inner layer as follows:

101 Polyethylene terephthalate or oriented polyamide (oPA) film

102 ... urethane adhesive layer

103 ... aluminum foil

111.Polypropylene, polyamide or urethane or polyethylene terephthalate hot melt coating

In FIG. 8 the lower laminate 119 is constructed from the outer layer to the inner layer as follows:

111.Polypropylene, polyamide or urethane or polyethylene terephthalate hot melt coating

103 ... aluminum foil

102 ... urethane adhesive layer

101 Polyethylene terephthalate or oriented polyamide (oPA) film

In FIG. 8, the aluminum tab 107 is bonded between the hot melt coating 106 of the upper laminate 120 and the lower laminate 119 (tab seal 110). The hot melt polymer 106 seal around the tab 107 is an airtight seal that prevents electrolyte leakage and moisture ingress.

A comparison of the sealing around the tab 107 in the known lithium ion battery 100 and the inventive lithium ion battery 121 is shown in FIGS. 9 and 10. The known lithium ion battery 100 of FIG. 9 is the same as that of FIGS. 1-4.

10 is a cross-sectional view of the lithium ion battery 121 of the present invention. In FIG. 10 the upper laminate 123 is constructed from the outer layer to the inner layer as follows:

101 Polyethylene terephthalate or oriented polyamide (oPA) film

102 ... urethane adhesive layer

103 ... aluminum foil

106 ... Acrylic acid modified polyethylene, polypropylene or maleic anhydride modified propylene sealant layer

111.Polypropylene, polyamide or urethane or polyethylene terephthalate hot melt coating

In FIG. 10 the lower laminate 122 is constructed from the outer layer to the inner layer as follows:

111.Polypropylene, polyamide or urethane or polyethylene terephthalate hot melt coating

106 ... Acrylic acid modified polyethylene, polypropylene or maleic anhydride modified propylene sealant layer

103 ... aluminum foil

102 ... urethane adhesive layer

101 Polyethylene terephthalate or oriented polyamide (oPA) film

The hot melt polymer tab seal area of the battery 121 of the present invention is better than the tap seal area of the known battery 100.

11-16 show a pin-seal type porch of the present invention lithium ion battery 124. 11 is a perspective view of a lithium ion battery 124 including a porch body 125 having a pin-seal portion 126.

Two electrically conductive metal (particularly aluminum) tabs 107 extend beyond the front perimeter 127 of the battery 124. 15 shows the front end of a battery 124. 13 and 14 show the back end of the battery 124. Body 125 and pin-seal portion 126 consist of a laminate used in the present invention. The battery 124 is comprised of a single piece laminate having a front tab seal 127, a front pin-seal 128, a back seal 129, and a back pin-seal 130. Hot melt polymer 131 is coated on the inner surface of the laminate in the region of the front tab seal 127 and the front pin-seal 128. The hotmelt polymer 131 completely seals around the tab 107 when the front tab seal 127 and the front pin-seal 128 are formed. This is best shown in FIG. Hotmelt polymer 131 is also coated on the interior of the laminate in the back seal 129 and back pin-seal 130 regions. When the back seal 129 and the back pin-seal 130 are formed, the hot melt polymer 131 completely seals holes or voids formed at the intersections of the back seal 129 and the back pin-seal 130. 12 is a side cross-sectional view of the battery 124. The bi-cells 108 accumulated in the central chamber 112 are shown. The electrolyte is contained in the central chamber 112. The front and back seals are completely sealed against electrolyte leakage and moisture (water and vapor) ingress by hot melt polymer 131.

17-19 show the three-sided seal (non-molded) porch of the present invention. FIG. 17 is a top view of a lithium ion battery 132 including a porch body 133 having a front tab seal region 134 and a side seal region 135 and a central chamber 136. Two electrically conductive metal (particularly aluminum, copper or nickel) tabs 107 extend beyond the front tab seal area 134. 18, the body 133 of the battery 132 is formed of the laminate 137 of the present invention. Hotmelt polymer 140 is coated on the inner surface nested over laminate 137 in front tab seal area 134. Hot melt polymer 140 completely seals around tab 107 when front tab seal region 134 is formed. This is best shown in FIG. Accumulated bi-cells (not shown) and electrolyte are included in the central chamber 112. The front tab seal area 134 is completely sealed against electrolyte leakage and moisture ingress by the hot melt polymer 140.

The seal strengths of the present invention and known techniques are as follows:

Known technology

6-15n / 15MM> 10-20N / 15mm

Therefore, a 200% seal strength increase is achieved. Seal strength as a function of service temperature is also of great importance. The seal must function under thermal and mechanical stresses. Therefore, the choice of sealant material is very important. The choice of sealant material in the present invention is focused on the material having a melting point above the maximum temperature at which the battery is exposed. The maximum temperature the battery is exposed to is 120 ° C. Long term tests are usually performed at 60 ° C. for at least 30 days and at 85 ° C. for 4 days. At these temperatures it is important to minimize electrolyte losses due to movement through the leaking member and seal.

The sealant chosen is therefore a material having a melting point above 120 ° C., at which temperature the battery is exposed.

One of the selection systems involves a thin lacquer coating on the laminate foil.

The present invention

Polyamide or polyester film of 12-50 μm, in particular 12-30 μm

Adhesive or tie layer

6-100 μm, especially 20-60 μm, even 20-50 μm aluminum foil

3-50 μm, especially 3-30 μm, even 3-10 μm polypropylene sealant

The material of the present invention does not use a large amount of sealant material in the laminate for sealing of the tab area and can be half the thickness compared to known materials and removes heat resistant films such as PET or oPA.

Example 1

Moldable Laminate Structures of the Invention

Polyamide film, 25㎛

Urethane adhesive

Aluminum foil, 45㎛

Polypropylene Coating, 6 μm

The present invention can be formed in the same shape as the known art. In other words, a 4.5mm deep and nearly vertical wall (4 degrees in the case of known technology) is formed.

The seal's resistance to electrolyte at elevated temperatures is as follows and the electrolyte filled and sealed package is exposed to 60 ° C. for 30 days when formed.

Known technology

22-105mg, 1.8-3.0mg depending on the structure

The above figures indicate the amount of electrolyte transferred through the seal for 30 days. Therefore, the present invention is seven times more resistant and sealable to electrolytes than known materials.

The tab area is sealed using the hot melt of the present invention. Hotmelt compensates for differences in thickness around taps that are 20-100 microns thick, depending on the battery. Polyamides, polyesters or polyolefins, in particular polypropylene based hot melts, are applied on the laminates or tabs of the present invention to completely seal the sides of these tabs to provide an airtight seal. At the same time, the hot melt prevents the tabs from contacting the aluminum of the package, which shortens the battery.

The importance of the similar properties of laminate sealants and hot melts is in promoting the heat sealing process. The inventive laminate sealant and hot melt are sealed together with the tab and the remaining periphery is also sealed at the same temperature, pressure and residence time conditions.

The propylene sealant of the present invention has a melting point of 150 ° C. and the hot melt has a melting point of 156 ° C., which is a perfect match between the two materials during the heat sealing process.

It is very difficult to protect the tap area against electrolyte migration over time when known materials are used. The same parallel test is carried out with the formed, electrolyte filled and sealed package, in which the inventive material using known materials and hot melts is tested in the tap. The selected tab material is 50 microns thick aluminum. The sealed package is exposed to 60 ° C. for 20 days and the electrolyte loss is quantified.

Sealed tab with known material Tab sealed according to the present invention

111-736mg12-21mg depending on the structure

The above data shows the amount of electrolyte lost through the seal, including the tapped area and the surrounding area sealed after 20 days. Therefore, the material of the present invention, which uses hot melt for tap sealing, exhibits at least five times the performance of known materials. The present invention also reduces the amount of electrolyte loss.

In addition to the remarkable performance improvements in battery protection, the laminate of the present invention is 25% lighter than known materials. The material of the invention is 40% thinner than known materials for simultaneously moldable structures.

In addition, different sizes and thicknesses of tabs can be easily accommodated by varying the amount of hot melt applied to seal the sides of the tabs. This is possible without changing the laminate of the present invention. On the other hand, when using known materials, the sealant layer needs to be modified to accommodate thicker or thinner tabs. Therefore, if the tab is 80 microns instead of 50 microns, the sealant material of known laminates should be nearly twice as thick to provide a hermetic seal around the tab. The thicker the seal, the greater the path of travel for electrolyte and moisture, which affects the transport of electrolyte and moisture through the seal. Side seals that need to be additionally stacked are also thicker and take up more space and are difficult to stack because of the bulk nature of known laminates.

The present invention solves all of these problems by appropriately administering the hotmelt to the tab seal area without sacrificing side seals. Movement is kept to a minimum and folding the side seals is not affected at all.

The seal area that needs to be folded consists of two layers in the case of the present invention or known technology. Therefore, in the case of the present invention, the thickness of the seal is 40% thinner, which greatly reduces the space lost in the corrugated seal. In addition, the materials of the present invention show improved performance over known materials. This facilitates the folding process.

Thinner laminates may be used based on the present invention if no molding is required:

Polyester or polyamide film, 9-12 μm

Urethane adhesive

Aluminum foil, 10-25㎛

Polypropylene coating, 3-6㎛

Foils of at least 20-25 μm thickness are preferred so that the aluminum foil is free of pinholes.

Example 2

Laminates are used to make non-moldable lithium ion batteries. The laminate consists of:

Polyester film, PET 12 μm

Urethane adhesive

Aluminum foil, 25㎛

Polypropylene Coating, 3 μm

Hotmelts are used to seal the metal tabs to provide a fully hermetic seal with the laminate of the present invention.

Once the pin-seal type porch is formed, the two ends of the end seal to which the pin-seal connects are most important in terms of integrity. The invention also applies hot melt to the connection point between the pin-seal and the end seal in addition to the tab area.

Claims (41)

(a) a first laminate having a peripheral portion and a central portion, (b) a second laminate having a perimeter and a central portion, the first and second laminates comprising a metal foil, an outer polymer layer bonded to one side of the metal foil, a hot melt polymer on the other side of the aluminum foil at least at the periphery of the metal foil A coating, wherein the hotmelt polymer coating at the periphery of the first and second laminates is sealed together, (c) a central chamber formed by the central portions of the first and second laminates, (d) anodes, cathodes and electrolytes arranged in a current chamber in a central chamber; (e) two electrically conductive connector strips located between the two perimeters, one end of which is connected to the anode in the central chamber, one end of which is connected to the cathode in the central chamber, and the other end of the two connectors Battery consisting of connector strips extending beyond the perimeter (a) a first laminate having a peripheral portion and a central portion, (b) a second laminate having a perimeter and a central portion, the first and second laminates comprising a metal foil, an outer polymer layer bonded to one side of the metal foil, a hot melt polymer on the other side of the aluminum foil at least at the periphery of the metal foil A coating, wherein the hotmelt polymer coating at the periphery of the first and second laminates is sealed together, (c) a central chamber formed by the central portions of the first and second laminates, (d) anodes, cathodes and electrolytes arranged in a current chamber in a central chamber; (e) two electrically conductive connector strips located between the two perimeters, one end of which is connected to the anode in the central chamber, one end of which is connected to the cathode in the central chamber, and the other end of the two connectors Battery packaging consisting of connector strips extending beyond the perimeter (a) a first laminate having a peripheral portion and a central portion, (b) a second laminate having a perimeter and a central portion, the first and second laminates comprising a metal foil, an outer polymer layer bonded to one side of the metal foil, an inner polymer sealant layer on the other side of the metal foil, The inner polymer sealant layer at the periphery of the first and second laminates is sealed together, (c) a central chamber formed by the central portions of the first and second laminates, (d) anodes, electrolytes and lithium alloys or compounds arranged in a current-conducting manner in a central chamber; (e) two electrically conductive connector strips located between the two perimeters, one end of which is connected to the anode in the central chamber, one end of which is connected to the cathode in the central chamber, and the other end of the two connectors Lithium battery consisting of connector strips extending beyond the periphery and hot-melt polymer positioned in a sealed manner between each connector and the perimeter of the sealant layer in the area around each connector 4. The battery of claim 3 wherein the metal foil is aluminum foil, soft annealed aluminum alloy foil, soft annealed copper alloy foil or nickel. The battery of claim 3 wherein the lithium battery is a lithium polymer battery and the metal foil is aluminum foil. The battery of claim 3 wherein the lithium battery is a lithium ion battery. The battery according to claim 6, wherein the metal foil is an aluminum foil having a thickness of 5-100 μm. 8. The battery of claim 7, wherein the aluminum foil is a soft annealed aluminum alloy foil. 7. The battery of claim 6 wherein the inner polymer sealant layer is maleic anhydride graft polypropylene, epoxy-propylene material, propylene, acrylic acid modified propylene, polyethylene, polyamide, polyester or urethane. 10. The battery of claim 9 wherein the inner polymer sealant layer is polyamide or polyethylene terephthalate. 10. The battery of claim 9 wherein the inner polymer sealant layer has a thickness of 5-100 μm. 10. The battery of claim 9 wherein the inner polymer sealant layer has a melting point of at least 120 ° C. The battery of claim 6 wherein the hot melt polymer is maleic anhydride graft polypropylene, epoxy-propylene material, propylene, acrylic acid modified propylene, polyethylene, polyamide, polyester or urethane. 10. The battery of claim 9 wherein the hot melt polymer is polyamide or polyethylene terephthalate. The battery of claim 13 wherein the hot melt polymer has a melting point of at least 120 ° C. that is similar to the melting point of the inner polymer sealant layer. 10. The battery of claim 9 wherein the outer polymer layer is polyamide or polyester. The battery of claim 16 wherein the outer polymer layer has a thickness of 12-50 μm. 17. The battery of claim 16 wherein the outer polymer layer is a biaxially oriented polyamide, a biaxially oriented polyester, or a biaxially oriented polypropylene. 7. The battery of claim 6 wherein the outer polymer layer is bonded to the metal foil with an adhesive layer or tie layer. 20. The battery of claim 19 wherein the adhesive layer is a solvent based or solvent-free urethane based adhesive or a polyester based adhesive or an epoxy based one or two component adhesive. 20. The battery of claim 19 wherein the tie layer is polyethylene, polypropylene or polyolefin, such as acrylic acid modified polyethylene or polypropylene. 7. The battery of claim 6 wherein the lithium battery has a porch shape or has a rectangular right-angle wall shaped cavity or a three-sided pin-seal type porch. 7. The battery of claim 6 wherein the hot melt polymer is a coating on the entire surface of the inner polymer sealant layer. (a) a first laminate having a peripheral portion and a central portion, (b) a second laminate having a perimeter and a central portion, the first and second laminates comprising an aluminum foil, an outer polymer layer bonded to one side of the aluminum foil, an inner polymer sealant layer on the other side of the aluminum foil, The inner polymer sealant layer at the periphery of the first and second laminates is sealed together, (c) a central chamber formed by the central portions of the first and second laminates, (d) two electrically conductive connector strips located between the two perimeters, one end of which is connected to the anode in the central chamber, one end of which is connected to the cathode in the central chamber, and the other end of the two connectors Packaging for lithium batteries consisting of connector strips extending beyond the perimeter and where the hot melt polymer is hermetically located between each connector and the periphery of the sealant layer in the area around each connector (a) a first laminate having a peripheral portion and a central portion, (b) a second laminate having a perimeter and a central portion, the first and second laminates being an aluminum foil, an outer polymer layer bonded to one side of the aluminum foil, a hot melt polymer on the other side of the aluminum foil at least at the periphery of the aluminum foil A coating, wherein the hotmelt polymer coating at the periphery of the first and second laminates is sealed together, (c) a central chamber formed by the central portions of the first and second laminates, (d) anodes, electrolytes and lithium alloys or compounds arranged in a current-conducting manner in a central chamber; (e) two electrically conductive connector strips located between the two perimeters, one end of which is connected to the anode in the central chamber, one end of which is connected to the cathode in the central chamber, and the other end of the two connectors Lithium-ion battery consisting of connector strips extending beyond the perimeter 27. The battery of claim 25 wherein the lithium battery is a lithium polymer battery. The battery of claim 25 wherein the lithium battery is a lithium ion battery. 28. The battery of claim 27 wherein the metal foil is an aluminum foil having a thickness of 5-100 μm. 29. The battery of claim 28 wherein the aluminum foil is a soft annealed aluminum alloy foil. 28. The battery of claim 27 wherein the inner polymer sealant layer is maleic anhydride graft polypropylene, epoxy-propylene material, propylene, acrylic acid modified propylene, polyethylene, polyamide, polyester, or urethane. 31. The battery of claim 30 wherein the inner polymer sealant layer has a thickness of 5-100 μm and a melting point of at least 120 ° C. 28. The battery of claim 27 wherein the hot melt polymer is maleic anhydride graft polypropylene, epoxy-propylene material, propylene, acrylic acid modified propylene, polyethylene, polyamide, polyester, or urethane. 33. The battery of claim 32 wherein the hot melt polymer has a melting point of at least 120 ° C. that is similar to the melting point of the inner polymer sealant layer. 28. The battery of claim 27 wherein the outer polymer layer is polyamide or polyester. 35. The battery of claim 34 wherein the outer polymer layer has a thickness of 12-50 μm. 35. The battery of claim 34 wherein the outer polymer layer is a biaxially oriented polyamide, a biaxially oriented polyester, or a biaxially oriented polypropylene. 28. The battery of claim 27 wherein the outer polymer layer is bonded to the metal foil with an adhesive layer or tie layer. 38. The battery of claim 37 wherein the adhesive layer is a solvent based or solvent-free urethane based adhesive or a polyester based adhesive or an epoxy based one or two component adhesive. 38. The battery of claim 37 wherein the tie layer is polyethylene, polypropylene or polyolefin, such as acrylic acid modified polyethylene or polypropylene. 28. The battery of claim 27 wherein the lithium battery has a porch shape or has a rectangular right-angle wall shaped cavity or a three-sided pin-seal type porch. (a) a first laminate having a peripheral portion and a central portion, (b) a second laminate having a perimeter and a central portion, the first and second laminates being an aluminum foil, an outer polymer layer bonded to one side of the aluminum foil, a hot melt polymer on the other side of the aluminum foil at least around the aluminum foil A coating, wherein the hotmelt polymer coating at the periphery of the first and second laminates is sealed together, (c) a central chamber formed by the central portions of the first and second laminates, (d) anodes, electrolytes and lithium alloys or compounds arranged in a current-conducting manner in a central chamber; (e) two electrically conductive connector strips located between the two perimeters, one end of which is connected to the anode in the central chamber, one end of which is connected to the cathode in the central chamber, and the other end of the two connectors Packaging for Li-ion batteries consisting of connector strips extending beyond the perimeter