CN210579283U - High-uniformity electric heating film - Google Patents
High-uniformity electric heating film Download PDFInfo
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- CN210579283U CN210579283U CN201921526427.XU CN201921526427U CN210579283U CN 210579283 U CN210579283 U CN 210579283U CN 201921526427 U CN201921526427 U CN 201921526427U CN 210579283 U CN210579283 U CN 210579283U
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Abstract
The utility model discloses a high homogeneity electrical heating membrane, its main points are: comprises an encapsulation layer, a positive electrode layer, a negative electrode layer and a resistance layer; the positive electrode layer and the negative electrode layer are respectively arranged at the upper side and the lower side of the resistance layer and are electrically connected with the resistance layer in a surface contact way; the encapsulating layer insulatively encapsulates the positive electrode layer, the negative electrode layer, and the resistive layer. The utility model discloses an electric heating film uses copper metal mesh as positive electrode layer, and the resistance layer has positive temperature coefficient thermistor effect, realize the circular telegram back heating function as negative electrode layer with the foil, change the plane flow mode of original electric heating film current into normal direction flow mode, shorten current flow path, avoided the inhomogeneous phenomenon of heating that the resistance layer (also conductive heating layer) produced because of the preparation technology restriction, reduce the processing production degree of difficulty, the yield improves greatly, and the safety in utilization also promotes greatly.
Description
Technical Field
The utility model relates to an electrical heating technical field specifically is a high homogeneity electrical heating membrane and preparation method thereof.
Background
The low-temperature electrothermal film (hereinafter referred to as an electric heating film) is a semitransparent polyester film capable of heating after being electrified, and a conductive heating element is usually packaged in an insulating polyester film. The power supply is communicated with the electric heating film through a lead to convert electric energy into heat energy. Because the electric heating film is a pure resistance circuit, the conversion efficiency is high, and most of the electric heating film (98%) is converted into heat energy except a small loss (2%).
The traditional linear conductive heating element comprises a metal wire, a metal foil tape, a carbon fiber wire and the like. The linear conductive heating elements are arranged in the electric heating film in a linear or continuous S-shaped (serpentine) manner at intervals, so that the temperature of the position where the conductive element is located in the electric heating film is higher, and the temperature of the area uncovered by the electric element gradually decreases, namely the farther the position where the conductive element is located is, the lower the temperature is, and the temperature deviation of the electric heating film is up to 20%.
Some surface-shaped conductive heating elements are appeared, metal powder, conductive carbon black, carbon nano tubes, graphene and the like are compounded with high molecules to form conductive paint, then the conductive paint is coated on a polyester film to form a surface-covered conductive heating layer, and the surface heating mode greatly promotes the development of an electric heating film, so that the temperature distribution of the electric heating film is uniform. However, the following problems still need to be solved: 1. the plane conductive heating layer is easily affected by the preparation process, the lifting difficulty of the existing process is high, and uniform coating cannot be guaranteed, so that the phenomenon that the local temperature is too high or too low still exists, and potential safety hazards exist. 2. After the electric heating film is partially covered, the temperature is easy to rise, the power of the covered area cannot be automatically and properly adjusted, the rise of the temperature is limited, and potential safety hazards exist. 3. The existing electric heating film has poor transverse soaking capability and cannot realize heat homogenization through transverse heat conduction.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a simple structure, the more even high homogeneity electrical heating membrane of heat distribution.
Realize the utility model discloses the basic technical scheme of purpose is: a high homogeneity electrical heating membrane, its structural feature is: including an encapsulation layer, a positive electrode layer, a negative electrode layer, and a resistive layer. The positive electrode layer and the negative electrode layer are respectively arranged on the upper side and the lower side of the resistance layer and are electrically connected with the resistance layer in a surface contact mode. The packaging layer is used for insulating and packaging the positive electrode layer, the negative electrode layer and the resistance layer, and the positive electrode layer and the negative electrode layer are respectively electrically connected with a power supply through corresponding leads in use.
The technical scheme based on the basic technical scheme is as follows: the positive electrode layer is composed of a metal mesh.
The technical scheme based on the corresponding technical schemes is as follows: the positive electrode layer is electrically connected with a first lead-out wire.
The technical scheme based on the corresponding technical schemes is as follows: the negative electrode layer is composed of a metal foil.
The technical scheme based on the corresponding technical schemes is as follows: the negative electrode layer is electrically connected with a second lead-out wire.
The technical scheme based on the corresponding technical schemes is as follows: the resistance layer is a conductive sheet with positive temperature coefficient thermistor effect, and the thickness of the conductive sheet is 1-2 mm.
The technical scheme based on the corresponding technical schemes is as follows: the packaging layer comprises a bottom layer and a surface layer. The bottom layer and the surface layer are made of the same material and are made of polyester films, polyvinyl chloride films or organic silicon rubber films. The surface layer is fixedly arranged on the bottom layer in a bonding way.
The utility model discloses following beneficial effect has: (1) the high-uniformity electric heating film has a simple structure, and the no-load temperature deviation of a heating area is less than 2.5%; after partial covering, the temperature deviation of the covered position is less than 10% of that of the uncovered position, and is far lower than the level of the prior art (the no-load temperature deviation of the heating area is more than 10%; after partial covering, the temperature deviation of the covered position is more than 25% of that of the uncovered position). The utility model discloses a high homogeneity electrical heating membrane temperature homogeneity improves greatly.
(2) The utility model discloses a high homogeneity electrical heating membrane regards as positive electrode layer with copper metal mesh, the resistance layer has positive temperature coefficient thermistor effect, realize the circular telegram back heating function as negative electrode layer with the metal forming, change the plane flow mode of original electrical heating membrane current into normal direction flow mode, shorten current flow path, avoided the resistance layer (also electrically conductive heating layer) because of the inhomogeneous phenomenon of heating that the preparation technology restriction produced, reduce the processing production degree of difficulty, the yield improves greatly, the safety in utilization also promotes greatly.
(3) The utility model discloses a high homogeneity electrical heating membrane's resistance layer has positive temperature coefficient thermistor effect, and the resistance layer can rise the back resistance increase at heating membrane local temperature, thereby the reduction power restraines the temperature rise, has further improved the safety in utilization.
(4) The utility model discloses a high homogeneity electrical heating membrane's positive electrode layer adopts metal mesh structure, and negative electrode layer adopts the metal forming structure, and metal mesh and metal forming all have good heat conductivity to make the heat obtain good propagation on horizontal, be favorable to improving high homogeneity electrical heating membrane's temperature homogeneity.
Drawings
Fig. 1 is a schematic structural view of the high uniformity electric heating film of the present invention.
The reference numbers in the drawings are:
the package layer 1, the bottom layer 11, the surface layer 12,
the positive electrode layer 2 is formed on the positive electrode layer,
the negative electrode layer 3 is formed on the negative electrode layer,
the resistance layer (4) is provided,
a first lead-out wire (5),
and a second lead-out wire 6.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings. The description of the orientation of the utility model is performed according to the orientation shown in fig. 1, that is, the up-down left-right direction shown in fig. 1 is the up-down left-right direction of the description, the side towards which fig. 1 faces is the front side, and the side departing from fig. 1 is the rear side.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
It should be understood that the terms "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on the positional relationships illustrated in the drawings, and are used only for convenience in describing the present invention or simplifying the description, but do not indicate that a particular orientation must be provided.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
(example 1)
Referring to fig. 1, the high uniformity electric heating film of the present invention includes an encapsulation layer 1, a positive electrode layer 2, a negative electrode layer 3, and a resistance layer 4.
The encapsulation layer 1 includes a bottom layer 11 and a top layer 12. The bottom layer 11 and the surface layer 12 are made of the same material, and can be made of a polyester film, a polyvinyl chloride film or an organic silicon rubber film.
The positive electrode layer 2 is a metal mesh, in this embodiment, a copper mesh made of red copper material, and the mesh of the copper mesh is 40 to 200 meshes, in this embodiment, 100 meshes. The metallic copper mesh is directly available on the market. The copper mesh is electrically connected with a first lead-out wire 5, and the first lead-out wire 5 is a sheathed wire.
The negative electrode layer 3 is formed of a metal foil, and this embodiment uses an aluminum material for an aluminum foil having a thickness of 15 to 30 micrometers, and this embodiment uses an aluminum foil having a thickness of 20 micrometers. The aluminum foil is electrically connected with a second lead-out wire 6, and the second lead-out wire 6 is a sheath wire.
The resistance layer 4 is a conductive sheet having a positive temperature coefficient thermistor effect, and the thickness of the conductive sheet is 1 to 2 mm. The positive electrode layer 2 is fixedly adhered to the lower side of the conducting sheet, embedded in the conducting sheet and electrically connected with the conducting sheet in a contact way; the negative electrode layer 3 is fixedly bonded to the upper side of the conductive sheet and is in surface contact electrical connection with the conductive sheet.
The positive electrode layer 2, the negative electrode layer 3, the resistance layer 4, the corresponding part of the first lead-out wire 5 and the corresponding part of the second lead-out wire 6 are insulated and encapsulated between the bottom layer 11 and the surface layer 12 of the encapsulation layer 1, and are bonded and fixed with the bottom layer 11 or the surface layer 12, and the first lead-out wire 5 and the second lead-out wire 6 extend out of the encapsulation layer 1 and are used for being electrically connected with corresponding power supplies. The surface layer 12 is adhesively fixed by its periphery to the base layer 11, thereby insulatively encapsulating the positive electrode layer 2, the negative electrode layer 3, the resistive layer 4, the corresponding portion of the first lead-out wire 5, and the corresponding portion of the second lead-out wire 6.
The utility model discloses a manufacturing approach of high homogeneity electrical heating membrane includes following step:
and (I) manufacturing the resistance layer 4. Mixing conductive powder with a high polymer material, melting the conductive powder and the high polymer material through a smelting furnace, uniformly mixing, and extruding a flaky conductive sheet with the thickness of 1-2 mm through a precision extruder, wherein the conductive sheet forms a resistance layer 4 and has a positive temperature coefficient thermistor effect. The conductive powder can be one or a mixture of more of conductive carbon black, graphene, carbon nano tubes, graphite powder, metal powder and conductive ceramic powder; the high polymer material is a partially crystallized high polymer such as linear low density polyethylene, polyvinylidene fluoride or ethylene-vinyl acetate copolymer.
Respectively attaching the metal foil and the metal mesh to the upper side and the lower side of the conducting strip, and bonding and fixing the metal foil on the upper side of the conducting strip through rolling of a hot press, wherein the metal foil and the conducting strip form surface contact electric connection; the metal net is embedded into the lower side of the conducting plate and is connected with the conducting plate bonding and fixing motor, and good conduction of the metal net and the conducting plate is achieved. The metal foil constitutes the negative electrode layer 3, and the metal mesh constitutes the positive electrode layer 4.
And (iii) electrically connecting the first lead-out wire 5 to the positive electrode layer 4. The second lead-out wire 6 is electrically connected to the negative electrode layer 3.
And (IV) insulating and encapsulating the positive electrode layer 2, the negative electrode layer 3, the resistance layer 4, the corresponding portion of the first lead-out wire 5 and the corresponding portion of the second lead-out wire 6 in the encapsulation layer 1. The first lead-out wire 5 and the second lead-out wire 6 extend outwards out of the packaging layer 1 and are used for being electrically connected with corresponding power supplies. The surface layer 12 and the bottom layer 11 are made of the same material and are made of polyester films, polyvinyl chloride films or organic silicon rubber films. The packaging layer 1 is formed by bonding and fixedly connecting the surface layer 12 and the bottom layer 11 at the periphery through a hot pressing process, the positive electrode layer 2, the negative electrode layer 3, the resistance layer 4, the corresponding part of the first lead-out wire 5 and the corresponding part of the second lead-out wire 6 are packaged in an insulating way, and the positive electrode layer 2, the negative electrode layer 3, the resistance layer 4, the corresponding part of the first lead-out wire 5 and the corresponding part of the second lead-out wire 6 are bonded and fixedly connected with the surface layer 12 or the bottom layer 11.
(example 2)
The rest of this example is the same as example 1, except that: the present embodiment does not include the first lead-out wire 5 and the second lead-out wire 6, and directly insulatively encapsulates the positive electrode layer 2, the negative electrode layer 3, and the resistive layer 4 all in the encapsulation layer 1. When the packaging layer is used, a small part of the negative electrode layer is exposed after the corresponding part on the upper side of the packaging layer 1 is hot-melted, and then the corresponding lead is electrically connected to the part and is subjected to corresponding insulation treatment. And (3) carrying out hot melting on the corresponding part of the lower side of the packaging layer 1 to expose a small part of the positive electrode layer, then electrically connecting the corresponding lead on the part, and carrying out corresponding insulation treatment.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A high uniformity electrical heating film, characterized in that: comprises an encapsulation layer, a positive electrode layer, a negative electrode layer and a resistance layer; the positive electrode layer and the negative electrode layer are respectively arranged at the upper side and the lower side of the resistance layer and are electrically connected with the resistance layer in a surface contact way; the packaging layer is used for insulating and packaging the positive electrode layer, the negative electrode layer and the resistance layer, and the positive electrode layer and the negative electrode layer are respectively electrically connected with a power supply through corresponding leads in use.
2. The high uniformity electrical heating film according to claim 1, wherein: the positive electrode layer is composed of a metal mesh.
3. The high uniformity electric heating film according to claim 1 or 2, wherein: the positive electrode layer is electrically connected with a first lead-out wire.
4. The high uniformity electrical heating film according to claim 1, wherein: the negative electrode layer is composed of a metal foil.
5. The high uniformity electric heating film according to claim 1 or 4, wherein: the negative electrode layer is electrically connected with a second lead-out wire.
6. The high uniformity electrical heating film according to claim 1, wherein: the resistance layer is a conductive sheet with positive temperature coefficient thermistor effect, and the thickness of the conductive sheet is 1-2 mm.
7. The high uniformity electrical heating film according to claim 1, wherein: the packaging layer comprises a bottom layer and a surface layer; the bottom layer and the surface layer are made of the same material and are made of a polyester film, a polyvinyl chloride film or an organic silicon rubber film; the surface layer is fixedly arranged on the bottom layer in a bonding way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921526427.XU CN210579283U (en) | 2019-09-12 | 2019-09-12 | High-uniformity electric heating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921526427.XU CN210579283U (en) | 2019-09-12 | 2019-09-12 | High-uniformity electric heating film |
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| Publication Number | Publication Date |
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| CN210579283U true CN210579283U (en) | 2020-05-19 |
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| CN201921526427.XU Active CN210579283U (en) | 2019-09-12 | 2019-09-12 | High-uniformity electric heating film |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112599785A (en) * | 2021-03-03 | 2021-04-02 | 浙江艾罗网络能源技术股份有限公司 | Self-temperature-control current collector of lithium ion battery and preparation method and application thereof |
| WO2022140942A1 (en) * | 2020-12-28 | 2022-07-07 | Dongguan Littelfuse Electronics Company Limited | High power pptc heater for low limiting temperature operation |
-
2019
- 2019-09-12 CN CN201921526427.XU patent/CN210579283U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022140942A1 (en) * | 2020-12-28 | 2022-07-07 | Dongguan Littelfuse Electronics Company Limited | High power pptc heater for low limiting temperature operation |
| US11621108B2 (en) | 2020-12-28 | 2023-04-04 | Littelfuse, Inc. | PPTC tank heater |
| US11670440B2 (en) | 2020-12-28 | 2023-06-06 | Littelfuse, Inc. | PPTC actuator heater |
| CN112599785A (en) * | 2021-03-03 | 2021-04-02 | 浙江艾罗网络能源技术股份有限公司 | Self-temperature-control current collector of lithium ion battery and preparation method and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210811 Address after: 225300 Jiangyan Industrial Park, Kunshan high tech Zone, Sanshui street, Jiangyan District, Taizhou City, Jiangsu Province Patentee after: Jiangsu ketainuan Technology Co.,Ltd. Address before: 225500 north of Chenzhuang road and east of Keji Avenue, Jiangyan Economic Development Zone, Taizhou City, Jiangsu Province Patentee before: Jiangsu Sitai graphene Application Technology Research Institute Co.,Ltd. Patentee before: 2D CARBON (CHANGZHOU) TECH Inc.,Ltd. |
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| TR01 | Transfer of patent right |