WO2018236968A1 - Plaque composite isolante - Google Patents

Plaque composite isolante Download PDF

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Publication number
WO2018236968A1
WO2018236968A1 PCT/US2018/038449 US2018038449W WO2018236968A1 WO 2018236968 A1 WO2018236968 A1 WO 2018236968A1 US 2018038449 W US2018038449 W US 2018038449W WO 2018236968 A1 WO2018236968 A1 WO 2018236968A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
thermoplastic material
plate layer
layer
metal mesh
Prior art date
Application number
PCT/US2018/038449
Other languages
English (en)
Inventor
Hongchuan Liao
Chunhua Yang
Original Assignee
Illinois Tool Works Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN201820731437.6U external-priority patent/CN208271672U/zh
Application filed by Illinois Tool Works Inc. filed Critical Illinois Tool Works Inc.
Priority to EP18739707.0A priority Critical patent/EP3642027A1/fr
Priority to US16/625,283 priority patent/US20210410345A1/en
Publication of WO2018236968A1 publication Critical patent/WO2018236968A1/fr

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Classifications

    • 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
    • B32B15/02—Layer formed of wires, e.g. mesh
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/685—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by laminating inserts between two plastic films or plates
    • B29C70/687—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by laminating inserts between two plastic films or plates the inserts being oriented, e.g. nets or meshes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
    • B29C48/0014—Extrusion moulding in several steps, i.e. components merging outside the die producing flat articles having components brought in contact outside the extrusion die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B29K2021/003—Thermoplastic elastomers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts

Definitions

  • the present application relates to an insulating composite plate, and more particularly to an insulating composite plate with an electromagnetic shielding function for applications requiring simultaneous electromagnetic shielding and insulation.
  • Insulating plates are used to insulate various electronic devices or components to avoid failures caused by electronic short circuits and breakdowns between electronic devices or units, or electronic components in electronic devices or units, and to reduce the risks of fire of electronic devices or components, thereby ensuring the normal operation of various types of electronic components.
  • insulating films are required to have different operating characteristics.
  • an insulating composite plate comprising:
  • middle plate layer located between the upper plate layer and the lower plate layer, the middle plate layer being a metal mesh
  • the upper surface of the middle plate layer and the lower surface of the upper plate layer are bonded together, and the lower surface of the middle plate layer and the upper surface of the lower plate layer are bonded together.
  • the upper plate layer and the lower plate layer are bonded together at the position of the openings of the metal mesh.
  • the insulating composite plate is configured for molding into a battery pack cover shape
  • the battery pack cover is configured for mounting on a battery pack housing.
  • the plate as described above is characterized in that:
  • the insulating composite plate is formed to have four walls extending from its peripheral edges to form a battery pack cover.
  • thermoplastic material is a thermoplastic resin.
  • the insulating composite plate is made by cast heat press molding or co-extrusion process; in the manufacturing process, the thermoplastic material on the upper plate layer and/or the lower plate layer penetrates the openings of the metal mesh in a molten state, and comes into contact with the lower plate layer or the upper plate layer on the other side of the metal mesh; after the thermoplastic material in a molten state is solidified, the upper plate layer is integrated with the lower plate layer so that the metal mesh is locked between the upper plate layer and the lower plate layer.
  • the plate upper layer and the plate lower layer are bonded together without using an additional medium.
  • the thermoplastic resin forming the upper plate layer and the lower plate layer penetrates the openings of the metal mesh in a molten state, so that the upper plate layer and the lower plate layer are bonded together.
  • the upper plate layer and the lower plate layer are made of the same material.
  • the plate upper layer and the plate lower layer are made of different kinds of materials.
  • thermoplastic material may be selected from PP, PC or PET.
  • thermoplastic material is PP.
  • neither the upper plate layer nor the lower plate layer contains a flame retardant.
  • the upper plate layer and the lower plate layer contain a flame retardant.
  • the flame retardant is a halogen-containing flame retardant or a halogen-free flame retardant, the halogen-containing flame retardant being a bromine-containing flame retardant or a chlorine-containing flame retardant, the halogen-free flame retardant being a phosphorus-containing flame retardant or a nitrogen-containing or silicon-containing or sulfur- containing or inorganic flame retardant.
  • the flame retardancy rating of the plate is V-2 or VTM-2 or higher, or V-0 or VTM- 0, and meets the RoHS standard.
  • the metal mesh is made of copper, or another metal, or an alloy.
  • the metal mesh is made of copper or an alloy thereof.
  • the metal mesh has a specification of 20 openings to 400 openings, or 50 openings to 100 openings.
  • the thickness of the upper plate layer is 0.05 mm to 4.0 mm, or 0.43 mm to 2 mm; the thickness of the middle plate layer is 0.05 mm to 0.4 mm; the thickness of the lower plate layer is 0.05 mm to 4.0 mm, or 0.43 mm to 2 mm.
  • the plate has a thickness of 0.15 mm to 5.0 mm, or 0.75 mm to 4 mm, or 1.5 mm to 3 mm, the plate has a CTI of 250 volts or higher, or 600 volts or higher, and the plate has an RTI of 90°C or higher.
  • the plate as described above is produced by cast heat press molding or co-extrusion process.
  • a method for producing an insulating composite plate comprising:
  • thermoplastic material in a molten state flows out of the extruder and enters a head die through a connecting pipe and is formed into a first plate thermoplastic material in the head die;
  • thermoplastic material in a molten state flows out of the extruder and enters the head die through the connecting pipe and is formed into a second plate thermoplastic material in the head die;
  • the first thermoplastic material and the second thermoplastic material are each selected from PP, PC or PET.
  • the first thermoplastic material and the second thermoplastic material are the same or different.
  • the metal mesh is provided by unwinding from a metal mesh roll to convey the metal mesh to the cooling molding roll.
  • the press-fitted sheet formed in step (d) is wound into a press-fitted sheet roll, and the press-fitted sheet is unwound from the press-fitted sheet roll to convey the press-fitted sheet to the cooling molding roll.
  • the thicknesses of the upper plate layer and the lower plate layer are determined by controlling the speed at which the first plate thermoplastic material and the second plate thermoplastic material exit the head die and the rotational speed of the cooling molding roll.
  • the method for producing an insulating composite plate as described above comprises step (i) of heating the press-fitted sheet before step (h).
  • the thermoplastic material on the upper plate layer and/or the lower plate layer penetrates the openings of the metal mesh in a molten state, and comes into contact with the lower plate layer or the upper plate layer on the other side of the metal mesh; after the thermoplastic material in the molten state is solidified, the upper plate layer is integrated with the lower plate layer so that the metal mesh is locked between the upper plate layer and the lower plate layer.
  • a method for producing an insulating composite plate comprising:
  • thermoplastic material in a molten state flows out of the first extruder and enters a first head die through a first connecting pipe and is formed into a first plate thermoplastic material in the first head die;
  • thermoplastic material in a molten state flows out of the second extruder and enters a second head die through a second connecting pipe and is formed into a second plate thermoplastic material in the second head die;
  • the first thermoplastic material and the second thermoplastic material in a molten state penetrate the openings of the metal mesh to come into contact with each other; after the first thermoplastic material and the second thermoplastic material in a molten state are solidified, they are integrated so that the metal mesh is locked between the upper plate layer and the lower plate layer.
  • the first thermoplastic material and the second thermoplastic material are each selected from PP, PC or PET.
  • thermoplastic material and the second thermoplastic material are the same or different.
  • the metal mesh is provided by unwinding from a metal mesh roll to convey the metal mesh to the cooling molding roll.
  • the thicknesses of the upper plate layer and the lower plate layer are determined by controlling the speed at which the first plate thermoplastic material and the second plate thermoplastic material exit the head die and the rotational speed of the cooling molding roll.
  • a composite plate provided by the present application has excellent insulation performance and electromagnetic shielding function, and is applicable to isolating various electronic components.
  • Figure 1 is a schematic cross-sectional view of an insulating composite plate according to an embodiment of the present application
  • Figure 2 is another schematic cross-sectional view of the insulating composite plate shown in Figure 1 for schematically illustrating a state where the upper plate layer 101 and the lower plate layer 103 penetrate the openings 105 of the metal mesh 102 to be bonded together;
  • Figures 3A and 3B illustrate a cast heat press molding process of an insulating composite plate according to an embodiment of the present application
  • Figure 4 shows a co-extrusion process of producing an insulating composite plate according to an embodiment of the present application
  • Figure 5 is a top view of a metal mesh in an insulating composite plate of the present application.
  • Figure 6 is a schematic view of a battery pack cover made of an insulating composite plate of the present application.
  • Figure 7 is a schematic view of the battery pack cover in Figure 6 on the battery pack housing.
  • FIG. 1 shows a schematic cross-sectional view of an insulating composite plate 100 according to an embodiment of the present application.
  • the plate 100 comprises an upper plate layer 101, a middle plate layer 102, and a lower plate layer 103 bonded together.
  • the upper plate layer 101 and the lower plate layer 103 are made of a thermoplastic material so that the plate 100 has a good insulation effect.
  • the thermoplastic material may be a thermoplastic resin.
  • the thermoplastic materials used to make the upper plate layer 101 and the lower plate layer 103 may be the same or different.
  • the thermoplastic material used to make the upper plate layer 101 and the lower plate layer 103 may be PP, PC or PET. In one embodiment, PP is used as the material of the upper plate layer 101 and the lower plate layer 103.
  • PP is a non-toxic, odorless, tasteless milky white crystalline polymer with a density of 0.90 g/cm 3 to 0.91 g/cm 3 , which is one of the lightest varieties in all plastics. Therefore, when PP is selected as the material of the upper plate layer 101 and the lower plate layer 103, a plate 100 with a lighter overall weight can be obtained to meet the requirements for plate weight in an actual application (such as a battery pack cover plate for an electric vehicle); (2) In addition, PP as a hydrophobic polymer material with excellent electrical insulation properties.
  • PP has a melting point of 164°C to 170°C, and has good heat resistance.
  • a product can be used under 125°C for a long period of time. It is not deformed under 150°C without external force, so that the plate 100 delivers the high-temperature resistance required in practical applications (for example, when it is used as a battery pack cover); (5) PP has very good chemical stability.
  • a flame retardant or no flame retardant may be added to the thermoplastic material of the upper plate layer 101 and/or the lower plate layer 103.
  • the flame retardant is a halogen-containing flame retardant or a halogen-free flame retardant, the halogen- containing flame retardant being a bromine-containing flame retardant or a chlorine-containing flame retardant, the halogen-free flame retardant being a phosphorus-containing flame retardant or a nitrogen-containing or silicon-containing or sulfur-containing or inorganic flame retardant.
  • the RoHS standard is met.
  • the plate retardancy rating can reach V- 2 or VTM-2 or higher, and can even reach V-0 or VTM-0.
  • the middle plate layer 102 is located between the upper plate layer 101 and the lower plate layer 103.
  • the middle plate layer 102 is a metal mesh, so that the insulating composite plate 100 of the present application has an electromagnetic shielding function.
  • the metal mesh of the middle plate layer 102 is embedded in the surfaces of the upper plate layer 101 and the lower plate layer 103 to form a firm connection between the upper plate layer 101, the middle plate layer 102, and the lower plate layer 103.
  • Figure 5 shows a schematic structural diagram for the metal mesh.
  • the metal mesh may be copper or another metal, or an alloy of copper or another metal. In one embodiment, the metal mesh is copper or an alloy thereof. In another embodiment, the metal mesh is elemental copper.
  • the number of openings of the metal mesh is related to the electromagnetic shielding effect and the forming and processing of a product.
  • the electromagnetic shielding effect of the metal mesh the larger the number of openings of the metal mesh is, the better it is; for the forming and processing of a metal mesh product, the smaller the number of openings of the metal mesh is, the better it is.
  • the number of openings of the metal mesh is usually 20 to 400, or 50 to 300, or 50 to 200, or 50 to 100, or 80.
  • the diameter of a metal wire may be 0.01 mm to 0.2 mm, the spacing between adjacent metal wires may be 0.05 mm to 0.3 mm, and the thickness of the metal mesh may be 0.05 mm to 0.4 mm.
  • the number of metal mesh openings disclosed in the present application makes it possible to achieve a good electromagnetic shielding effect while facilitating the forming and processing of a product.
  • the thermoplastic materials of the upper plate layer 101 and/or the lower plate layer 103 in a molten state penetrate the openings of the metal mesh to come into contact with the lower plate layer 103 or the upper plate layer 101 on the other side of the metal mesh.
  • the molten thermoplastic material cools and solidifies, it is bonded to the lower plate layer and/or the upper plate layer 101 to form an insulating composite plate of the present application.
  • Figure 2 is another schematic cross-sectional view of the plate 100, for schematically showing a state where the upper plate layer 101 and the lower plate layer 103 are bonded together through the openings of the metal mesh.
  • the thermoplastic materials of the upper plate layer 101 and/or the lower plate layer 103 penetrate the openings 105 of the metal mesh and are bonded together.
  • the portions of the upper plate layer 101 and the lower plate layer 103 that penetrate the mesh openings 105 of the metal mesh are bonded as if formed integrally.
  • the upper plate layer 101 and the lower plate layer 103 can be bonded together without using any other medium, for example, glue.
  • the method for bonding the upper plate layer 101 and the lower plate layer 103 of the insulating composite plate 100 of the present application is such that the upper plate layer 101 and the lower plate layer 103 are tightly bonded together for a long time, as if formed integrally. Therefore, there is no separation between the upper plate layer 101, the middle plate layer 102, and the lower plate layer 103. In addition, there is no gap between the upper plate layer 101, the middle plate layer 102, and the lower plate layer 103. Thus, moisture cannot enter between the upper plate layer 101, the middle plate layer 102, and the lower plate layer 103 to corrode the metal mesh of the middle plate layer 102.
  • the thickness of the upper plate layer 101 of the insulating composite plate 100 of the present application is 0.05 mm to 4.0 mm
  • the thickness of the middle plate layer 102 is 0.05 mm to 0.4 mm, or 0.43 mm to 2 mm
  • the thickness of the lower plate layer 103 is 0.05 mm to 4.0 mm, or 0.43 mm to
  • the total thickness of the plate is 0.15 mm to 5.0 mm, or 0.75 mm to 4 mm, or 1.5 mm to
  • the thickness of an insulating composite plate of the present application can meet the customer requirements for the mechanical properties of plates.
  • the Comparative Tracking Index (CTI) of the insulating composite plate 100 of the present application may be 250 volts or higher, and may even reach 600 volts or higher, particularly when the thermoplastic material used for manufacturing the insulating composite plate 100 of the present application is PP, PC or PET.
  • CTI Comparative Tracking Index
  • PP polyethylene
  • PC polycarbonate
  • the insulating composite plate 100 of the present application has the following benefits:
  • the insulating composite plate 100 of the present application has a good insulating effect because of the upper plate layer 101 and the lower plate layer 103 made of a thermoplastic material.
  • the middle plate layer 102 of the insulating composite plate 100 of the present application is a metal mesh, the insulating composite plate 100 of the present application also has the function of electromagnetic shielding.
  • insulating plates are generally used for the purpose of insulation; in applications requiring electromagnetic shielding, metal plates are generally used for electromagnetic shielding; in applications requiring both insulation and electromagnetic shielding, a combination of insulating plates and metal plates is needed.
  • an insulating material and a metal mesh are combined so as to meet the application requirements for both insulation and battery shielding.
  • the insulating composite plate 100 of the present application has a relatively small weight because the plate 100 of the present application has the upper plate layer 101 and the lower plate layer 103 made of a thermoplastic material.
  • electromagnetic shielding using the insulating plate 100 of the present application reduces the weight of an apparatus or device, and thus avoids the problems caused when the dead weight of the metal plate is too large, for example, reducing the apparatus or device weight, which in turn reduces energy consumption.
  • the upper plate layer 101 and the lower plate layer 103 of the insulating composite plate 100 of the present application are bonded together through the openings of the metal mesh of the middle plate layer 102 in a molten state during the forming process, as if formed integrally.
  • the upper plate layer 101 and the lower plate layer 103 can be firmly and tightly bonded together for a long time without separation.
  • moisture cannot enter between the upper plate layer 101, the middle plate layer 102, and the lower plate layer 103 to corrode the metal mesh of the middle plate layer 102.
  • the metal mesh of the middle plate layer 102 is embedded or at least partially embedded in the surfaces of the upper plate layer 101 and the lower plate layer 103, further strengthening the bonding strength between the layers of the plate 100.
  • the insulating composite plate 100 of the present application is suitable for use in various applications requiring electromagnetic shielding and insulation.
  • the insulating composite plate 100 of the present application is particularly suitable for use as a battery pack cover for an electric vehicle due to the benefits described above.
  • global energy and the environment are facing enormous challenges.
  • oil/electric hybrid power and plug-in oil/electric hybrid power will be an important transition route.
  • the research and development hot spots of electric vehicles are mainly the improvement of operating range.
  • the direction of improvement is, on the one hand, from the improvement of battery technology, and on the other hand, from the reduction in the vehicle body weight under the premise of ensuring the safety of vehicles. Since the battery in an electric vehicle emits electromagnetic waves during operation, electromagnetic interference with other electronic components of the vehicle is easily generated and the human body is adversely affected.
  • the current solution is to add a metal cover plate above the battery.
  • a metal cover plate is relatively heavy. Therefore, adding a metal cover plate above a vehicle battery increases the weight of the vehicle body, and thus leads to higher vehicle energy consumption, which is not conducive to improving the operating range of the electric vehicle.
  • a battery pack cover for an electric vehicle produced by using the insulating plate 100 of the present application not only enables a battery pack cover to have a good insulating effect but also has the function of electromagnetic shielding.
  • a battery pack cover made of the insulating composite plate 100 of the present application has a significantly smaller dead weight compared with a metal plate in the prior art, the vehicle body weight is reduced and thus the vehicle energy consumption is reduced. Therefore, the development expectation of increasing the operating range of electric vehicles is met.
  • the layers of the insulating composite plate 100 of the present application can be firmly and tightly bonded together for a long time without separation, no gap exists between the layers of the plate, so that moisture cannot enter between the layers of the plate to corrode the metal mesh of the middle plate layer 1.
  • the insulating composite plate 100 of the present application can maintain an excellent electromagnetic shielding effect for a long time.
  • FIG 6 is a schematic view of a battery pack cover 600 made of the insulating composite plate 100 according to the present application.
  • the battery pack cover 600 is formed in a shape of four walls extending from the peripheral edges for covering the battery pack housing, so that the four walls of the battery pack cover 600 extending from the peripheral edges surround the four walls of the battery pack housing.
  • Figure 7 shows a schematic view of the battery pack cover 600 in Figure 6 covered on the battery pack housing.
  • FIGS 3A and 3B are schematic views of a cast heat press molding process of the plate 100 according to an embodiment of the present application.
  • the cast heat press molding process comprises an extrusion apparatus 301 and a molding apparatus 302.
  • the extrusion apparatus 301 comprises a head die 305, a body 309, and a hopper 307.
  • the hopper 307 is for receiving a thermoplastic material.
  • the head die 305 has an inlet end 352 and an outlet end 351.
  • the body 309 has a body outlet end 321; the body outlet end 321 and the inlet end 352 of the head die 305 are connected by a pipe 330 for conveying a material to the head die 305.
  • the body 309 also has a feed inlet 323 connected to the hopper 307 for receiving a material from the hopper 307.
  • the body 309 is provided with a drive mechanism, for example, a drive screw (not shown).
  • the head die 305 has a suitable width and thickness for accommodating a material transferred from the body 309, and the die cavity of the head die 305 is substantially flat, so that a material transferred from the body can be molded into a flat shape.
  • the molding apparatus 302 has a plurality of rollers 328 for cooling and molding.
  • particles of a first thermoplastic material are added to the hopper 307.
  • the particles of the first thermoplastic material enter the body 309 through the feed inlet of the body 309.
  • the particles of the first thermoplastic material are melted in the body 309 to form a molten state and are mixed uniformly and then, by the drive mechanism of the body, are fed via the pipe 330 to the head die 305 through the inlet end 352 of the head die 305.
  • the first thermoplastic material in a molten state is molded to form a first plate thermoplastic material 360.
  • the first plate thermoplastic material 360 is output from the outlet end 351 of the head die 305 to the molding roll 328 of the molding apparatus 302.
  • the metal mesh 102 is unwound from the metal mesh roll 12 so that the unwound metal mesh 102 and the first plate thermoplastic material 360 are in an up-down positional relationship while being conveyed to the molding roll 328 of the molding apparatus 302, successively passing between the molding rolls 328.1 and 328.2 and between the molding rolls 328.2 and 328.3.
  • the molding rolls 388.1, 328.2 and 328.3 apply tensile and compressive forces to the first plate thermoplastic material 360 and the metal mesh 102, so that the metal mesh 102 is embedded or at least partially embedded in the surface of the first plate thermoplastic material 360 to form a press-fitted plate 310.
  • the press-fitted plate 310 is rolled into a press-fitted plate roll.
  • the metal mesh 102 and the first plate thermoplastic material 360 may pass through a plurality of rollers, or may pass only two rollers.
  • the second step of the cast heat press molding process is shown in Figure 3B. Similar to the first step, particles of a second thermoplastic material are added into the body 309 from the hopper 307.
  • the particles of the second thermoplastic material may be the same as or different from the particles of the first thermoplastic material.
  • the particles of the second thermoplastic material enter the body 309 through the feed inlet of the body 309.
  • the particles of the second thermoplastic material are melted in the body 309 to form a molten state and are mixed uniformly and then, by the drive mechanism of the body, are fed via the pipe 330 to the head die 305 through the inlet end 352 of the head die 305.
  • the second thermoplastic material in a molten state is molded to form a second plate thermoplastic material 380 in a molten state.
  • the second plate thermoplastic material 380 is output from the outlet end 351 of the head die 305 to the molding roll 328 of the molding apparatus 302.
  • the press-fitted plate 310 formed as shown in Figure 3A is unwound from the press-fitted plate roll.
  • the unwound press-fitted plate 310 and the second plate thermoplastic material 380 are simultaneously conveyed to the molding roll 328 of the molding apparatus 302, successively passing between the molding rolls 328.1 and 328.2 and between the molding rolls 328.2 and 328.3.
  • one side of the metal mesh 102 of the press-fitted plate 310 faces the second plate thermoplastic material 380.
  • the molding roll 328 applies tensile and compressive forces to the second plate thermoplastic material 380 and the press-fitted plate 310 such that the metal mesh 102 of the press-fitted plate 310 is embedded or at least partially embedded in the second plate thermoplastic material 380.
  • the second plate thermoplastic material 380 is in a molten state when it exits the outlet end 351 of the head die. Therefore, when the molding roll 328 presses the second plate thermoplastic material 380 and the press-fitted plate 310, the second plate thermoplastic material 380 in a molten state may flow through the openings in the metal mesh 102 to come into contact with the first plate thermoplastic material 360 of the press-fitted plate 310 and solidify after being cooled by the molding roll 328.
  • the second plate thermoplastic material 380 and the first plate thermoplastic material 360 can remain firmly and tightly bonded together over a long period of time.
  • the press-fitted plate 310 may be selectively heated so that the first plate thermoplastic material 360 therein reaches a molten state, thereby achieving a firmer and tighter bonding between the first plate thermoplastic material 360 and the second plate thermoplastic material 380.
  • desired thicknesses of the upper plate layer 101 and the lower plate layer 103 can be obtained by controlling the speed at which the first plate thermoplastic material and the second plate thermoplastic material exit the head die 305 and the rotational speed of the molding roll 328.
  • Figure 4 shows a co-extrusion process for producing an insulating composite plate according to the present application, the process comprising two extrusion apparatuses and one molding apparatus.
  • a first extrusion apparatus 301.1 produces the first plate thermoplastic material 360
  • a second extrusion apparatus 301.2 produces the second plate thermoplastic material 380; the first plate thermoplastic material 360, the metal mesh 102, and the second plate thermoplastic material 380 are molded together by the molding apparatus 302 to produce the plate 100.
  • Particles of the first thermoplastic material are added into the body 309.1 through the hopper 307.1.
  • the first thermoplastic material melts in the body 309.1 to form a molten state and, by the drive mechanism of the body 309.1, is fed via the pipe 330.1 to the head die 305.1 through the inlet end 352.1 of the head die 305.1.
  • the first thermoplastic material in a molten state is molded to form a first plate thermoplastic material 360 in a molten state.
  • the second plate thermoplastic material 360 is output from the outlet end 351.1 of the head die 305.1 to the molding roll 328 of the molding apparatus 302. At the same time, particles of the second thermoplastic material are added into the body 309.2 through the hopper 307.2.
  • the particles of the second thermoplastic material can be the same as or different from the particles of the first thermoplastic material.
  • the second thermoplastic material melts in the body 309.2 to form a molten state and, by the drive mechanism of the body 309.2, is fed via the pipe 330.2 to the head die 305.2 through the inlet end 352.2 of the head die 305.2.
  • the second thermoplastic material in a molten state is molded to form a second plate thermoplastic material 380 in a molten state.
  • the second plate thermoplastic material 380 is output from the outlet end 351.2 of the head die 305.2 to the molding roll 328 of the molding apparatus 302.
  • the metal mesh 102 is unwound from the metal mesh roll 12 so that the unwound metal mesh 102, the first plate thermoplastic material 360, and the second plate thermoplastic material 380 are simultaneously conveyed to the molding roll 328 of the molding apparatus 302, successively passing between the molding rolls 328.1 and 328.2 and between the molding rolls 328.2 and 328.3. In this process, the metal mesh 102 is located between the first plate thermoplastic material 360 and the second plate thermoplastic material 380.
  • the molding rolls 328.1, 328.2, and 328.3 apply tensile and compressive forces to the first plate thermoplastic material 360, the second plate thermoplastic material 380, and the metal mesh 102 such that the metal mesh 102 is embedded or at least partially embedded in the surfaces of the first plate thermoplastic material 360 and the second plate thermoplastic material 380.
  • the first plate thermoplastic material 360 and the second plate thermoplastic material 380 are in a molten state when exiting the outlet ends 351.1 and 351.2 of the head die.
  • the molding roll 328 presses the first plate thermoplastic material 360, the second plate thermoplastic material 380, and the press-fitted plate 310
  • the first plate thermoplastic material 360 and the second plate thermoplastic material 380 in a molten state may flow through the openings in the metal mesh 102 to come into contact with each other and solidify after being cooled by the molding roll 328.
  • the second plate thermoplastic material 380 and the first plate thermoplastic material 360 as if integrally molded, can remain firmly and tightly bonded together over a long period of time.
  • the metal mesh 102, the first plate thermoplastic material 360, and the second plate thermoplastic material 380 may pass through a plurality of rollers, or may pass through only two rollers.
  • the middle plate layer 102, the upper plate layer 101, and the lower plate layer 103 of the metal mesh can be firmly and tightly bonded together for a long time, not prone to separation.
  • moisture cannot enter between the middle plate layer 102, the upper plate layer 101, and the lower plate layer 103 to corrode the metal mesh.
  • the materials used in these embodiments were as follows: PP, manufactured by ITW Electronic Components/Products (Shanghai) Co., Ltd. under the trade name Formex GK; the copper mesh was an 80-opening commercial copper mesh, wherein the diameter of the copper wire was 0.1 mm, the spacing of adjacent copper wires was 0.2 mm, the thickness was 0.15 mm, and the copper content was 99.8%.
  • PP particles were plasticized and molded to obtain an upper plate layer.
  • the thickness of the upper plate layer obtained by molding was 0.13 mm.
  • the upper plate layer obtained by molding and the copper mesh placed between the head die and the roller were cooled and molded at the same time by the roller to obtain a press-fitted plate.
  • the PP particles were then plasticized and molded to obtain a lower plate layer, which was kept 0.76 mm thick.
  • the press-fitted plate of the previously molded upper plate layer and the copper mesh was placed between the head die and the roller, and was rolled, cooled, and molded together with the lower plate layer to obtain an insulating composite plate.
  • PP particles were plasticized and molded to obtain an upper plate layer.
  • the thickness of the upper plate layer obtained by molding was 0.25 mm.
  • the upper plate layer obtained by molding and the copper mesh placed between the head die and the roller were cooled and molded at the same time by the roller to obtain a press-fitted plate.
  • the PP particles were then plasticized and molded to obtain a lower plate layer, which was kept 2.5 mm thick.
  • the press-fitted plate of the previously molded upper plate layer and the copper mesh was placed between the head die and the roller, and was rolled, cooled, and molded together with the lower plate layer to obtain an insulating composite plate.
  • Embodiment 3 Embodiment 3
  • PP particles were plasticized and molded to obtain an upper plate layer.
  • the thickness of the upper plate layer obtained by molding was 0.43 mm.
  • the upper plate layer obtained by molding and the copper mesh placed between the head die and the roller were cooled and molded at the same time by the roller to obtain a press-fitted plate.
  • the PP particles were then plasticized and molded to obtain a lower plate layer, which was kept 2.5 mm thick.
  • the press-fitted plate of the previously molded upper plate layer and the copper mesh was placed between the head die and the roller, and was rolled, cooled, and molded together with the lower plate layer to obtain an insulating composite plate.
  • PP particles were plasticized and molded to obtain an upper plate layer.
  • the thickness of the upper plate layer obtained by molding was 0.13 mm.
  • the upper plate layer obtained by molding and the copper mesh placed between the head die and the roller were cooled and molded at the same time by the roller to obtain a press-fitted plate.
  • the PP particles were then plasticized and molded to obtain a lower plate layer, which was kept 0.76 mm thick.
  • the press-fitted plate of the previously molded upper plate layer and the copper mesh was placed between the head die and the roller, and was rolled, cooled, and molded together with the lower plate layer to obtain an insulating composite plate.
  • the four samples produced were compared to observe their surface effects.
  • the four samples and aluminum foils were respectively used to wrap self-made battery packs; the battery packs were energized and different frequencies were configured.
  • the electric field intensities outside the battery packs before and after the four samples produced and the aluminum foils were used to wrap the battery packs were tested to obtain the differences in electric field intensity outside the battery packs before and after the four samples produced and the aluminum foils were used to wrap the battery packs. These differences reflected the electromagnetic shielding effects of the four samples produced and the aluminum foils.
  • the following table lists the results of the experiment on the differences in electric field intensity outside the battery packs before and after the four samples produced and the aluminum foils were respectively used to wrap the battery packs at 50 MHz:
  • the experimental results showed that the four insulating composite plates produced by compounding PP and a copper mesh according to the present invention effectively decreased the electric field intensities outside the wrapped battery packs (see the measured differences in electric field intensity outside the battery packs before and after the battery packs were wrapped); in addition, the electromagnetic shielding effect of the four insulating composite plates produced was similar to that of the aluminum foils (having the same thickness as the intermediate copper mesh of the four insulating composite plates produced). Therefore, an insulating composite plate of the present invention has a good electromagnetic shielding effect.
  • the thickness of the upper plate layer of an insulating composite plate of the present invention is greater than 0.43 mm, since in this case the upper plate layer has a large thickness and a high strength, the upper plate layer is not easily deformed when being pressed together with the copper mesh and the lower plate layer. Therefore, an insulating composite plate produced has a good surface effect, smooth and aesthetically pleasing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne une plaque composite isolante comprenant une couche de plaque supérieure, une couche de plaque inférieure et une couche de plaque intermédiaire. La couche de plaque supérieure et la couche de plaque inférieure sont constituées d'un matériau thermoplastique. La couche de plaque intermédiaire est située entre la couche de plaque supérieure et la couche de plaque inférieure. La couche de plaque intermédiaire est constituée d'un maillage métallique. La surface supérieure de la couche de plaque intermédiaire et la surface inférieure de la couche de plaque supérieure sont liées. La surface inférieure de la couche de plaque intermédiaire et la surface supérieure de la couche de plaque inférieure sont liées. Une plaque composite isolante d'après la présente invention possède des propriétés d'isolation satisfaisantes et peut protéger contre une interférence électromagnétique.
PCT/US2018/038449 2017-06-20 2018-06-20 Plaque composite isolante WO2018236968A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18739707.0A EP3642027A1 (fr) 2017-06-20 2018-06-20 Plaque composite isolante
US16/625,283 US20210410345A1 (en) 2017-06-20 2018-06-20 Insulating composite plate

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
CN201720719824 2017-06-20
CN201710471387 2017-06-20
CN201720719818 2017-06-20
CN201720719824.3 2017-06-20
CN201710471387.2 2017-06-20
CN201720719818.8 2017-06-20
CN201820731437.6 2018-05-16
CN201820731437.6U CN208271672U (zh) 2017-06-20 2018-05-16 一种绝缘薄膜
CN201810469235.3 2018-05-16
CN201810469235.3A CN109102971A (zh) 2017-06-20 2018-05-16 一种绝缘薄膜

Publications (1)

Publication Number Publication Date
WO2018236968A1 true WO2018236968A1 (fr) 2018-12-27

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PCT/US2018/038449 WO2018236968A1 (fr) 2017-06-20 2018-06-20 Plaque composite isolante

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2170450A (en) * 1985-02-01 1986-08-06 Draftex Ind Ltd Trimming or sealing strip
WO1996026067A1 (fr) * 1995-02-21 1996-08-29 Serrot Corporation Membrane thermoplastique monolithique renforcee par des mailles de tissu
EP2602095A1 (fr) * 2011-12-06 2013-06-12 Key & Key Holding B.V. Feuille isolante et procédé pour la fabrication d'articles d'isolation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2170450A (en) * 1985-02-01 1986-08-06 Draftex Ind Ltd Trimming or sealing strip
WO1996026067A1 (fr) * 1995-02-21 1996-08-29 Serrot Corporation Membrane thermoplastique monolithique renforcee par des mailles de tissu
EP2602095A1 (fr) * 2011-12-06 2013-06-12 Key & Key Holding B.V. Feuille isolante et procédé pour la fabrication d'articles d'isolation

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