Battery contact device and method for producing battery contact device

Abstract

The invention relates to a battery contact device (1) and to a method for producing a battery contact device (1), comprising a tool (20) having at least one lower tool half (21), on which a first laminated film (2) is arranged, at least one flat current collector (3) being arranged directly at each predetermined point of the first laminated film (2), and a second laminated film (3) being arranged directly at each predetermined point of the first laminated film (2). And combining the first laminated film (2) and the at least one current collector (3) by means of a heat generating device.

Description

Technical Field

[0001] This invention relates to a battery contact device and a method for manufacturing the battery contact device. Background Technology

[0002] Currently, various manufacturing processes are employed for the contacts and corresponding interconnections of battery cells used in battery modules for electric vehicles and similar applications. The contact system is prefabricated and supplied to the module production process.

[0003] In this configuration, the contact system consists of various components performing different tasks. On one hand, metal parts made of copper or aluminum are integrated together, which can conduct current from the battery cell and realize the corresponding circuitry; on the other hand, components used to hold these metal parts in place at least until the battery cell is in contact provide electrical and thermal insulation.

[0004] In current products, the insulating components that house the connector are achieved through injection molding or lamination.

[0005] Injection molding is a good process for producing frame-like structures of a certain size. Metal components can be overmolded using injection molding or subsequently assembled using mechanical clamps. Bonding or hot pressing are also common variations for assembling components. A drawback of these variations is that injection-molded parts, due to process requirements, have large wall thicknesses, resulting in rigid components that are difficult or almost impossible to provide for height / tolerance compensation when subsequently installing contact systems to battery cells. Furthermore, the increasing size of battery modules is pushing injection molding to its technological limits.

[0006] To address the aforementioned issues, lamination can be used to manufacture components. Here, a metal structure is fixed between two thin films. This process can be achieved through hot lamination or cold lamination. Hot lamination has a decisive advantage: all components can be precisely placed in the tooling without sticking together. The tooling is closed and appropriate force is applied, securing the component in place, followed by heating within the tooling. Heating softens the plastic film used and allows it to adhere to the complex structure of the collector. During the heat treatment, the adhesive applied to the films also cross-links and bonds the two layers together, simultaneously bonding the integrated metal components. The quality advantages of the final product are offset by the duration of the heat treatment, which hinders mass production and is critical to energy consumption.

[0007] On the other hand, cold lamination uses a pressure-sensitive adhesive (PSA) as the bond between the two films. This adhesive is activated by light pressure, making it impossible for the assembly to be precisely aligned in all the necessary positions within the tooling. Instead, a suitable soft roller must be used to roll the top film onto the bottom film and the positioned metal insert. While this reduces processing time, the final assembly has larger tolerances, and air bubbles can hinder precise film bonding. Summary of the Invention

[0008] Therefore, the objective of this invention is to provide a battery contact device and a method for manufacturing the battery contact device, which has sufficient flexibility to meet the requirements of various applications, optimize the arrangement between components, and reduce energy consumption during the manufacturing process.

[0009] This task is solved by the combination of features described in claims 1 and 8 of the patent.

[0010] According to the present invention, a method for manufacturing a battery contact device is provided, the battery contact device being particularly used to bring a battery cell into contact with a tool having at least one tool lower half, wherein a first laminated film is arranged on the tool lower half, at least one flat current collector is directly arranged at each predetermined position of the first laminated film, and the first laminated film and at least one current collector are combined by at least one heating device.

[0011] In a preferred embodiment of the invention, the heating device is a laser device, through which a laser beam from the laser device is combined with a first laminated film and at least one current collector. Alternatively or otherwise, an embodiment variant is conceivable in which at least one heating device is an infrared emitter, through which an infrared beam from the infrared emitter is combined with a first laminated film and at least one current collector. Another variant is conceivable in which the heating device is a hot press.

[0012] The advantage of this approach is that the heating element, preferably a laser beam from a laser device, heats the current collector, especially a current collector made of metal, thereby at least partially melting the thermoplastic material of the laminated film and forming a heat-sealed connection between the current collector and the first laminated film. Thus, the laminated film is bonded to the current collector by adhesive force. Furthermore, all components are positioned according to their subsequent location within the lower half of the tool. Due to the high moving speed and localized energy input of the laser device, significant energy savings are achieved compared to thermal lamination.

[0013] In an alternative embodiment, a pressure-sensitive adhesive, hot melt adhesive, or coating used to generate adhesion between the surface of the first laminated film and the contact surface of the current collector for contact with the first laminated film is disposed, particularly on the surface of the first laminated film, at least in areas at various predetermined locations. Here, the current collector is heated by a laser beam and / or an infrared beam, for example, by heat sealing to the carrier film.

[0014] In advantageous embodiments, it is specified that when arranging at least one collector, multiple collectors can be arranged, particularly in a predetermined number arranged in parallel rows and columns. In particular, the collectors are arranged parallel to each other.

[0015] In embodiments of this manufacturing method, at least one current collector is specified to be treated, particularly by cleaning, irradiation, and / or laser structuring, before being arranged to or incorporated into a contact surface provided for contacting the first laminated film. In this way, the connection between the laminated film and the current collector is improved.

[0016] Furthermore, the following embodiment is advantageous, wherein the tool also has an upper tool body, and the tool is closed by arranging the upper tool body on the lower tool body before engagement. Additionally, the upper tool body has tool grooves and / or laser beam transparent elements and / or infrared beam transparent elements at various predetermined positions for engagement, and during engagement, the laser beam and / or infrared beam radiates through the tool grooves and / or laser beam transparent elements and / or infrared beam transparent elements. Thus, the laser beam can irradiate the component to be irradiated by the laser beam of the laser device.

[0017] Preferably, the first laminated film is a laser beam absorption laminated film and / or an infrared beam absorption laminated film, and during the bonding process, the first laminated film absorbs the laser beam of the laser device and / or the infrared beam of the infrared emitter, thereby generating local energy input that melts the first laminated film.

[0018] According to the manufacturing method of the present invention, in one embodiment, each current collector is heated by a laser beam from a laser device and / or an infrared beam from an infrared emitter during the bonding process, thereby connecting each current collector and the first laminated film by a thermal adhesive phase.

[0019] In a preferred embodiment of the manufacturing method, after arranging at least one current collector, a second laser beam transparent and / or infrared beam transparent laminated film is directly arranged on the first laminated film, such that at least one current collector is directly arranged between the first laminated film and the second laminated film, particularly in a sandwich arrangement.

[0020] Therefore, in the structure of the dual-film assembly, one film is transparent to laser beams and / or infrared beams, while the second film absorbs laser beams and / or infrared beams, allowing energy to be directly input onto the contact surfaces of the films. This localized energy input causes the films to melt and form a bonded connection. On the other hand, the connection between the films and the metal components, particularly the corresponding current collectors, is achieved through adhesive force. According to an embodiment with only the first laminated film, in an alternative embodiment, a pressure-sensitive adhesive, hot melt adhesive, or coating used to generate adhesive force between the surface of the second laminated film and the contact surfaces of the current collector for contact with the first laminated film is disposed, particularly on the surface of the first laminated film, at least in areas at various predetermined locations. Here, the current collector is heated by a laser beam and / or infrared beam, for example, by heat sealing to the carrier film.

[0021] In an advantageous variant of the invention, during the bonding process, the laser beam from the laser device and / or the infrared beam from the infrared emitter at least partially pass through the second laminated film, and the first laminated film absorbs the laser beam from the laser device and / or the infrared beam from the infrared emitter. During this process, the first and second laminated films are interconnected, particularly by thermal bonding in a material-bonding manner.

[0022] In another embodiment of this manufacturing method, during the bonding process, the laser beam from the laser device and / or the infrared beam from the infrared emitter pass through the second laminated film and heat each current collector by the laser beam and / or the infrared beam from the infrared emitter, thereby connecting each current collector to the first laminated film and / or the second laminated film by thermal bonding. To facilitate the passage of the laser beam and / or infrared beam, in all relevant embodiments of this disclosure, the second laminated film has cutouts at least at corresponding predetermined locations, or the second laminated film is constructed of a material that is transparent to both the laser beam and / or the infrared beam.

[0023] In another preferred embodiment of the manufacturing method, during the bonding process, the laser beam of the laser device and / or the infrared beam of the infrared emitter are guided around each of the at least one collector, particularly extending parallel to the longitudinal and transverse directions of the respective collector, and / or across the respective collector.

[0024] A further advantage is that if the lower half of the tool has multiple positioning elements, particularly positioning pins or positioning bolts, wherein the second laminated film, at least one collector, and / or the first laminated film are positioned and / or tensioned relative to each other in a predetermined manner by means of the positioning elements during the respective arrangement.

[0025] In summary, this invention combines all the advantages of the battery contact system manufacturing technology described at the beginning, namely, it is not limited by the technology of injection molding in terms of component size, it achieves high flexibility and tolerance compensation by using laminated films, it allows for free positioning of components in fixtures, and in particular, it eliminates the need for prior bonding with pressure-sensitive adhesives. Furthermore, it enables rapid bonding of films and components by means of the laser beam of a laser device and / or the infrared beam of an infrared emitter partially melting the plastic layer of the corresponding laminated film, without the need for crosslinking adhesives.

[0026] According to the present invention, a battery contact device is also provided, particularly a battery contact device manufactured according to the method disclosed above, the battery contact device having a first laminated film and at least one flat current collector directly disposed at various predetermined positions on the first laminated film. Specifically, the first laminated film is a laser beam absorbing and / or infrared beam absorbing laminated film. Preferably, a pressure-sensitive adhesive, hot melt adhesive, or coating for generating adhesion between the surface of the first laminated film and the current collector is disposed on the surface of the first laminated film, at least within the areas of the respective predetermined positions.

[0027] In a preferred embodiment of the invention, the second laminated film is disposed directly on the first laminated film, such that at least one current collector is disposed directly between the first and second laminated films in a sandwich manner. Specifically, the second laminated film is at least partially a laser beam transparent laminated film and / or an infrared beam transparent laminated film.

[0028] In an advantageous embodiment, the corresponding laminated film is specified to have multiple slits. Specifically, the multiple slits are configured to give the corresponding laminated film a grid structure, particularly a punched grid structure. Furthermore, corresponding current collectors are arranged at at least one slit of the corresponding laminated film, particularly at two slits, so that the corresponding current collectors can contact, in particular, one or more battery cells through the slits.

[0029] Preferably, the battery contact device is constructed such that the first and / or second laminated films have conductor tracks, particularly conductor tracks made of copper, which connect at least one contact of the battery contact device, particularly a contact arranged at one of the cutouts, to a circuit board and / or bus and / or switching circuit, wherein the circuit board and / or the corresponding bus and / or switching circuit are also directly arranged between the first and second laminated films, particularly in a sandwich arrangement.

[0030] According to the invention, in another advantageous variant, the circuit board of the first and / or second laminated film is a flexible circuit board (FPC) having the conductor tracks, which in particular have a diameter of 35 µm and are made of polyimide (PI).

[0031] In one embodiment of the battery contact device according to the invention, a contact pad is constructed on the outer surface of the second laminated film in the region of at least one corresponding cut, particularly in the region of two cuts, for contacting, in particular indirectly contacting, the current collector arranged at the corresponding cut.

[0032] In an advantageous embodiment, the corresponding laminated film is specified to have a high-pressure bonding coating at least partially, particularly in the area of ​​each cut.

[0033] Furthermore, the following embodiments are advantageous, wherein the first laminated film is disposed directly on the heat insulation element and / or the heat insulation layer and / or the element with the heat insulation coating.

[0034] In a preferred embodiment of the invention, a plurality of current collectors are provided, particularly arranged in a predetermined number in parallel rows and columns. In particular, the current collectors are arranged parallel to each other.

[0035] It is further advantageous if at least one current collector has contact points on a surface opposite to the first laminated film for a particularly flexible circuit board or bus or switching circuit, wherein the circuit board or bus or switching circuit is also arranged directly, particularly in a sandwich manner, between the first laminated film and the second laminated film.

[0036] In another advantageous embodiment variant, clips and / or clamping elements for securing the cover and / or housing are arranged between the first laminated film and the second laminated film.

[0037] In one embodiment of the invention, the first and / or second laminated film is made of polyethylene terephthalate (PET) or polyamide and has a diameter, particularly 10 to 1000 µm, more particularly 50 to 150 µm, and preferably 100 µm.

[0038] Provided it is technically feasible and not contradictory, the features disclosed above can be combined as needed. In particular, when using an infrared emitter to replace or supplement a laser device as a heating device, and providing or using an infrared absorbing laminate or an infrared permeable laminate instead of a laser beam absorbing laminate or a laser beam permeable laminate, within the scope of this disclosure, the laminate correspondingly possesses the features of the laser beam absorbing laminate or the laser beam permeable laminate disclosed above. Attached Figure Description

[0039] Other advantageous embodiments of the invention are described in the dependent claims, or are described in more detail below together with the description of preferred embodiments of the invention, with reference to the accompanying drawings. Wherein:

[0040] Figure 1 An exploded view of the battery contact device arranged in the tool is shown;

[0041] Figure 2 This shows a perspective view of the battery contact device in the tool after it has been assembled;

[0042] Figure 3 This diagram illustrates the battery contact device during the bonding process.

[0043] The accompanying drawings are illustrative examples. The same reference numerals in the drawings denote the same functional and / or structural features. Detailed Implementation

[0044] Figure 1 An exploded view of the battery contact device 1 arranged in tool 20 is shown. Figure 2 The image shows a perspective view of the battery contact device 1 in tool 20 after assembly, as described in the manufacturing method below. (Refer to...) Figure 1 and Figure 2 Describe the battery contact device 1 and the tool 20.

[0045] First, the tool 20 has a lower tool body 21 and an upper tool body 22. At predetermined positions for engagement, the upper tool body 22 includes tool recesses and / or laser beam transparent elements 212 and / or infrared beam transparent elements, so that the laser beam can pass through the tool recesses and / or laser beam transparent elements 212 and / or infrared beam transparent elements during engagement. Furthermore, the lower tool body 21 has a plurality of positioning elements 211, particularly positioning pins or positioning bolts, for predetermined positioning and / or tensioning of the first laminated film 2, at least one collector 3, and / or the second laminated film 4 when corresponding components are arranged within the tool.

[0046] The battery contact device 1 includes a first laminated film 2 and a plurality of flat current collectors 3 directly disposed at predetermined positions on the first laminated film 2, the current collectors being arranged in rows and columns parallel to each other in a predetermined number. The first laminated film 2 is a laser beam absorbing and / or infrared beam absorbing laminated film. Furthermore, a second laminated film 4 is disposed directly on the first laminated film 2, such that at least one current collector 3 is sandwiched between the first laminated film 2 and the second laminated film 4. Here, the second laminated film 4 is a laser beam transparent laminated film and / or an infrared beam transparent laminated film. In the illustrated embodiment, the first and second laminated films 2 and 4 are made of polyamide and have a diameter of 100 µm.

[0047] The corresponding laminated films 2 and 4 have numerous cutouts 5, which are configured to give the corresponding laminated films 2 and 4 a punched grid structure. Here, the corresponding current collectors 3 are arranged in two cutouts 5 of the corresponding laminated films 2 and 4, so that the corresponding current collectors 3 can contact one or more battery cells or corresponding electrical connections through the cutouts 5.

[0048] Furthermore, the first and / or second laminated films 2, 4 include conductor tracks made of copper that connect at least one contact of the battery contact device 1, arranged at a notch, to the circuit board and / or bus and / or switching circuit, or are configured to such circuit board and / or bus and / or switching circuit. The circuit board and / or the corresponding bus and / or switching circuit are also directly sandwiched between the first laminated film 2 and the second laminated film 4. Additionally, the circuit board of the first and / or second laminated films 2, 4 is a flexible circuit board (flexible printed circuit) having conductor tracks with a diameter of 35µm and made of polyimide (PI). On the surface opposite to the first laminated film 2, each current collector 3 includes contacts for the flexible circuit board, bus, or switching circuit.

[0049] Furthermore, on the outer surface of the second laminated film 4, contact pads 51 are arranged in the areas of the two cuts 5 for indirect contact with the current collectors 3 arranged at the corresponding cuts 5. Additionally, the corresponding laminated films 4 and 5 include a high-voltage connection coating in the area of ​​each cut 5.

[0050] In addition, clips and / or clamping elements for securing the cover and / or housing are arranged between the first laminated film and the second laminated film.

[0051] Figure 3 A schematic diagram of the battery contact device 1 in the manufacturing method is shown below, which will be referred to below. Figure 3 Please provide an explanation.

[0052] A battery contact device 1 is used to contact a battery cell with a tool 20 having a lower half and upper half 21, 22. The method of manufacturing this battery contact device includes arranging a first laminated film 2 on the lower half 21. Furthermore, a plurality of flat current collectors 3 are arranged directly at predetermined positions on the first laminated film 2 in mutually parallel rows and columns. After the current collectors 3 are arranged, a second laser beam transparent and / or infrared beam transparent laminated film 4 is directly arranged on the first laminated film 2, such that the current collectors 3 are sandwiched between the first laminated film 2 and the second laminated film 4.

[0053] Furthermore, the lower half 21 of the tool also includes a plurality of positioning elements 211 configured as positioning pins or positioning bolts. Thus, during the corresponding arrangement process, the laser beam transparent and / or infrared beam transparent laminate 4, at least one current collector 3, and / or laser beam absorbing and / or infrared beam absorbing laminate 2 are positioned and tensioned relative to each other in a predetermined manner by the positioning elements 211. Furthermore, prior to arrangement or assembly, each current collector 3 is cleaned, irradiated, and / or laser-structured on the contact surface 31 provided for contact with the first laminate 2.

[0054] Before joining, the tool 20 is closed by placing the upper half 22 of the tool on the lower half 22 of the tool. Furthermore, the upper half 22 of the tool has tool grooves and / or laser beam transparent and / or infrared beam transparent elements 212 at various predetermined positions for joining, and during joining, the laser beam and / or infrared beam radiates through the tool grooves and / or laser beam transparent and / or infrared beam transparent elements 212.

[0055] Furthermore, the manufacturing method includes bonding the first laminated film 2 and at least one current collector 3 using the laser beam from the laser device 23 and / or the infrared beam from the infrared emitter. During this process, each current collector 3 is heated by the laser device 23 and / or the infrared emitter, causing the current collector 3 and the first laminated film 2 to be thermally bonded. Alternatively or additionally, during the bonding process, the first laminated film 2 absorbs the laser beam from the laser device 23 and / or the infrared beam from the infrared emitter, resulting in a localized energy input that melts the first laminated film 2. Alternatively or additionally, during the bonding process, the laser beam from the laser device 23 and / or the infrared beam from the infrared emitter passes through the second laminated film 4, and the first laminated film 2 absorbs the laser beam from the laser device 23 and / or the infrared beam from the infrared emitter. During this process, the first laminated film 2 and the second laminated film 4 are interconnected, particularly by thermal bonding. Alternatively or otherwise, during the bonding process, the laser beam of the laser device 23 and / or the infrared beam of the infrared emitter passes through the second laminated film 4 and heats each current collector 3, thereby connecting each current collector 3 to the first laminated film 2 and / or the second laminated film 4, particularly by thermal bonding. Alternatively or otherwise, during the bonding process, the laser beam of the laser device 23 and / or the infrared beam of the infrared emitter is guided around each current collector 3, extending parallel to the longitudinal and transverse directions of the respective current collector 3, and / or across the respective current collector 3. The guidance of the laser beam of the laser device 23 and / or the infrared beam of the infrared emitter... Figure 3 The corresponding arrows are used to indicate this.

[0056] The present invention is not limited to the preferred embodiments described above. Rather, many variations are conceivable, and the solutions shown can be used even in substantially different types of embodiments.

Claims

1. A method for manufacturing a battery contact device (1), the battery contact device being particularly used for contacting a battery cell with a tool (20) having at least one tool lower half (21), the method comprising the steps of: a. A first laminated film (2) is arranged on the lower half (21) of the tool; b. At least one flat current collector (3) is directly arranged at each predetermined position of the first laminated film (2). c. The first laminated film (2) and the at least one collector (3) are combined by means of a heating device.

2. The manufacturing method according to claim 1, wherein, The heating device is a laser device (23) and / or an infrared emitter, wherein the combination of the first laminated film (2) and the at least one current collector (3) is performed by the laser beam of the laser device (23) and / or the infrared beam of the infrared emitter.

3. The manufacturing method according to claim 1 or 2, wherein, The tool (20) also has an upper tool body (22), wherein the tool (20) is closed prior to the engagement by arranging the upper tool body (22) on the lower tool body (22), wherein the upper tool body (22) has tool grooves and / or laser beam transparent elements (212) and / or infrared beam transparent elements at various predetermined positions for engagement, wherein during engagement, the laser beam and / or the infrared beam radiates through the tool grooves and / or the laser beam transparent elements (212) and / or the infrared beam transparent elements.

4. The manufacturing method according to claim 2 or 3, wherein, The first laminated film (2) is a laser beam absorption laminated film and / or an infrared beam absorption laminated film, wherein during the bonding process, the first laminated film (2) absorbs the laser beam of the laser device (23) and / or the infrared beam of the infrared emitter, thereby generating local energy input that melts the first laminated film (2).

5. The manufacturing method according to any one of claims 2 to 4, wherein, During the bonding process, the laser beam of the laser device (23) and / or the infrared beam of the infrared emitter heat each current collector (3), so that each current collector (3) and the first laminated film (2) are connected by thermal bonding.

6. The manufacturing method according to any one of claims 2 to 5, wherein, After arranging the at least one current collector (3), the second laser beam transparent and / or infrared beam transparent laminated film (4) is directly arranged on the first laminated film (2), such that the at least one current collector (3) is directly arranged between the first laminated film (2) and the second laminated film (4), particularly in a sandwich manner.

7. The manufacturing method according to claim 6, wherein, During the bonding process, the laser beam of the laser device (23) and / or the infrared beam of the infrared emitter pass through the second laminated film (4), and the first laminated film (2) absorbs the laser beam of the laser device (23) and / or the infrared beam of the infrared emitter, wherein the first laminated film (2) and the second laminated film (4) are connected to each other, particularly by thermal bonding.

8. The manufacturing method according to claim 6 or 7, wherein, During the bonding process, the laser beam of the laser device (23) and / or the infrared beam of the infrared emitter pass through the second laminated film (4) and heat each current collector (3) through the laser beam of the laser device (23) and / or the infrared beam of the infrared emitter, thereby connecting each current collector (3) and the first laminated film (2) and / or the second laminated film (4) by thermal bonding.

9. A battery contact device (1), particularly a battery contact device (1) manufactured by the method according to any one of the preceding claims, having a first laminate (2) and at least one flat current collector (3) directly disposed at each predetermined position on the first laminate (2), wherein, in particular, the first laminate (2) is a laser beam absorbing and / or infrared beam absorbing laminate film.

10. The battery contact device (1) according to claim 9, wherein, The second laminated film (4) is disposed directly on the first laminated film (2), such that the at least one current collector (3) is disposed directly between the first laminated film (2) and the second laminated film (4), particularly in a sandwich manner, wherein the second laminated film (4) is, in particular, a laser beam transparent and / or infrared beam transparent laminated film.

11. The battery contact device (1) according to claim 9 or 10, wherein, The respective laminated films (2, 4) have a plurality of cuts (5), wherein, in particular, the plurality of cuts (5) are configured to give the respective laminated films (2, 4) a grid structure, and more particularly, a punched grid structure, wherein each current collector (3) is arranged at at least one, particularly two, cuts (5) of the respective laminated films (2, 4) so ​​that the respective current collector (3) can contact, in particular, one or more battery cells through the cuts (5).

12. The battery contact device (1) according to claim 10 or 11, wherein, The first and / or second laminated films (2, 4) have conductor tracks, particularly conductor tracks made of copper, which connect at least one contact of the battery contact device (1), particularly a contact arranged at one of the cuts, to a circuit board and / or bus and / or switch circuit, wherein the circuit board and / or the corresponding bus and / or switch circuit are also arranged directly between the first laminated film (2) and the second laminated film (4), particularly in a sandwich arrangement.

13. The battery contact device (1) according to claim 12, wherein, The circuit board of the first and / or second laminated film (2, 4) is a flexible circuit board (FPC) having the conductor track, which in particular has a diameter of 35µm and is made of polyimide (PI).

14. The battery contact device (1) according to any one of claims 9 to 13, wherein, On the outer surface of the second laminated film (4), contact pads (51) are arranged in the area of ​​at least one corresponding cut (5), particularly in the area of ​​two cuts (5), for contacting, especially indirectly contacting, the collectors (3) arranged at the corresponding cuts (5).

15. The battery contact device (1) according to any one of claims 9 to 14, wherein, The respective laminated films (4, 5) have at least partially, particularly in the area of ​​each cut (5), a high-pressure bonding coating.

16. The battery contact device (1) according to any one of claims 9 to 15, wherein, The first laminated film (2) is directly disposed on the heat insulation element and / or the heat insulation layer and / or the element with the heat insulation coating.

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