A method for manufacturing a low-cost automotive seat heating device

Abstract

The application relates to a manufacturing method of a low-cost automobile seat heating device, which comprises the following steps: providing a first substrate layer; pasting a heating layer on the surface of the first substrate layer, wherein the heating layer is composed of a plurality of heating strips and waste materials; pasting a conductive layer on the surface of the first substrate layer, wherein the conductive layer comprises a first electrode strip and a second electrode strip, the first electrode strip connects the positive electrode ends of each heating strip in series, and the second electrode strip connects the negative electrode ends of each heating strip in series, so that all the heating strips form parallel connection; pasting a second substrate layer on the side, away from the first substrate layer, of the heating layer and the conductive layer; hot-pressing the surface of the heating device, so that the first substrate layer and the second substrate layer are bonded to each other; and stamping the heating device to cut off the waste materials, the first substrate layer and the second substrate layer between every two adjacent heating strips. The application can set multiple heating strips in parallel through two independent circuits, significantly reduces the circuit cost, and the overall structure is hollow, so that the flexibility and air permeability are good.

Description

Technical Field

[0001] This invention relates to a process for heating automobile seats, and more particularly to a method for manufacturing a low-cost automobile seat heating device. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this invention and does not constitute prior art.

[0003] Most existing car seats are equipped with heating functions. The heating principle is that the seat heating module controls the current of the heating device to generate heat, raising the temperature of the seat and making passengers feel warmer and more comfortable in cold weather. The heating principle is mostly to supply power to the heating layer through corresponding circuits, converting electrical energy into heat energy.

[0004] Existing heating devices have the following two problems. First, in order to achieve the desired conductivity, the circuitry of the heating device often needs to cover the entire projection surface of the overall structure with a heating layer. Since the circuitry is mostly printed with silver paste, this significantly increases the cost. Second, the overall coverage area of ​​the heating device is large, without any perforations, resulting in poor flexibility and ventilation.

[0005] It should be noted that the above description of the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of the present invention and facilitating understanding by those skilled in the art. It should not be assumed that the above technical solutions are known to those skilled in the art simply because they have been described in the background section of this invention. Summary of the Invention

[0006] The purpose of this invention is to provide a low-cost method for manufacturing a car seat heating device. It can be configured by connecting multiple heating strips in parallel through two independent circuits, which significantly reduces circuit costs. Furthermore, the overall structure is hollowed out, which provides good flexibility and ventilation.

[0007] To achieve the above objectives, the present invention discloses a method for manufacturing a low-cost automotive seat heating device, the method comprising the following steps: Provide a first substrate layer; A heating layer is attached to the surface of the first substrate layer, wherein the heating layer consists of a plurality of spaced heating strips and waste material between the heating strips, and each heating strip has a positive end and a negative end that are arranged opposite to each other; A conductive layer is attached to the surface of the first substrate layer, wherein the conductive layer includes a first electrode strip and a second electrode strip, the first electrode strip connects the positive terminals of each heating strip in series, and the second electrode strip connects the negative terminals of each heating strip in series, so that all the heating strips are connected in parallel. A second substrate layer is attached to the heating layer and the heat-conducting layer on the side opposite to the first substrate layer. The surface of the heating device is hot-pressed to bond the first substrate layer and the second substrate layer together. The heating device is stamped to cut away the waste material, the first substrate layer, and the second substrate layer between every two adjacent heating bars.

[0008] As a further description of the above technical solution, in the step "applying a heating layer to the surface of the first substrate layer, wherein the heating layer is composed of a plurality of heating strips arranged at intervals, each heating strip having a positive end and a negative end arranged opposite to each other", the spacing between two adjacent heating strips is adjusted according to the different length distances between the positive and negative ends of each heating strip. The greater the distance between the positive and negative ends of the heating strip, the closer the interval between two adjacent heating strips; conversely, the closer the distance between the positive and negative ends of the heating strip, the greater the interval between two adjacent heating strips, so that the heating amount in any unit area covered by the heating layer is the same.

[0009] As a further description of the above technical solution, in the step "applying a heating layer to the surface of the first substrate layer, wherein the heating layer is composed of a plurality of heating strips arranged at intervals, each heating strip having a positive end and a negative end arranged opposite to each other", the width of the heating strip is adjusted according to the different length distances between the positive and negative ends of each heating strip. The greater the distance between the positive and negative ends of the heating strip, the wider the corresponding heating strip; conversely, the closer the distance between the positive and negative ends of the heating strip, the smaller the corresponding heating strip, so that the heating amount in any unit area covered by the heating layer is the same.

[0010] As a further description of the above technical solution, in the step of "attaching a heating layer to the surface of the first substrate layer, wherein the heating layer is composed of a plurality of heating strips arranged at intervals, and each heating strip has a positive end and a negative end arranged opposite to each other", the first substrate layer is divided into a first heating area and a second heating area arranged symmetrically, and an equal number of heating strips are arranged in the first heating area and the second heating area.

[0011] As a further description of the above technical solution, in the step of "attaching a conductive layer to the surface of the first substrate layer, wherein the conductive layer includes a first electrode strip and a second electrode strip, the first electrode strip connects the positive terminals of each heating strip in series, and the second electrode strip connects the negative terminals of each heating strip in series, so that all the heating strips are connected in parallel", the first electrode strip is arranged along the edge of the first substrate layer, and the second electrode strip is arranged along the middle position between the first heating area and the second heating area.

[0012] As a further description of the above technical solution, the projected dimensions of the first substrate layer and the second substrate layer are equal.

[0013] As a further description of the above technical solution, in the step of "providing a first substrate layer", a plurality of structural holes are processed on the first substrate layer. In the step of "attaching a heating layer to the surface of the first substrate layer, wherein the heating layer is composed of a plurality of heating strips arranged at intervals, and each heating strip has a positive end and a negative end arranged opposite to each other", each heating strip adjacent to the structural hole is attached to the edge of the structural hole.

[0014] As a further description of the above technical solution, the number of structural holes is multiple, and the multiple structural holes are spaced apart on the first substrate layer.

[0015] As a further description of the above technical solution, the first substrate layer and the second substrate layer are made of polyester fiber or non-woven fabric, and the heating strip is made of graphene.

[0016] As a further description of the above technical solution, after the step of "stamping the heating device and cutting away the waste material, the first substrate layer, and the second substrate layer between every two adjacent heating bars", a mesh layer is attached to the side of the second substrate layer away from the first substrate layer, and then the mesh layer is oriented towards the human body side, and the heating device is sewn into the car seat.

[0017] By employing the above technical solutions, the beneficial effects of the present invention are as follows: The manufacturing method of the low-cost car seat heating device of the present invention can significantly reduce circuit costs by setting up multiple heating strips in parallel with two independent circuits, and the overall structure is hollowed out, which has good flexibility and ventilation. Specifically, in the process of the present invention, multiple heating strips themselves exist in parallel as the main skeleton of the heating area. The first electrode strip and the second electrode strip are set as positive and negative poles adjacent to the edge of the corresponding heating area. The two ends of each heating strip are connected to the corresponding circuit, which significantly reduces the length of the circuit and controls the cost. Furthermore, based on the above-mentioned stacked structure of the present invention, the position between every two adjacent heating strips can be hollowed out, which significantly improves the flexibility and ventilation of the overall heating device, indirectly improving product quality and overall passenger comfort.

[0018] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of a method for manufacturing a low-cost car seat heating device provided in the embodiments of this specification; Figure 2-6 This is a schematic diagram illustrating the steps of a method for manufacturing a low-cost car seat heating device according to an embodiment of this specification; In the picture: 1. First substrate layer; 11. Structural hole; 12. First heating area; 13. Second heating area; 2. Heating layer; 21. Heating strip; 22. Waste material; 3. Conductive layer; 31. First electrode strip; 32. Second electrode strip; 4. Second substrate layer. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0022] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. Furthermore, the accompanying drawings of the present invention are for simple illustrative purposes only and are not depictions of actual dimensions; this is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of protection of the present invention.

[0023] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0024] Please see Figure 1-6 This embodiment describes a method for manufacturing a low-cost car seat heating device, which includes the following steps: Provide a first substrate layer 1; A heating layer 2 is attached to the surface of the first substrate layer 1, wherein the heating layer 2 is composed of a plurality of spaced heating strips 21 and waste material 22 between the heating strips 21, and each heating strip 21 has a positive end and a negative end arranged opposite to each other; A conductive layer 3 is attached to the surface of the first substrate layer 1, wherein the conductive layer 3 includes a first electrode strip 31 and a second electrode strip 32. The first electrode strip 31 connects the positive terminals of each heating strip 21 in series, and the second electrode strip 32 connects the negative terminals of each heating strip 21 in series, so that all the heating strips 21 are connected in parallel. A second substrate layer 4 is attached to the heating layer 2 and the heat-conducting layer on the side opposite to the first substrate layer 1. The surface of the heating device is hot-pressed to bond the first substrate layer 1 and the second substrate layer 4 together. The heating device is stamped to cut and remove the waste material 22, the first substrate layer 1, and the second substrate layer 4 between every two adjacent heating bars 21.

[0025] The aforementioned overall heating device is used to sew and install on the surface of the car seat. The first substrate layer 1 and the second substrate layer 4 are mainly located at the front and rear, serving as a basic frame and protection. The heating layer 2, as a direct resistance heat source, covers most of the area that needs to be heated. When energized, it converts current into heat energy to generate heat. The conductive layer 3 is mainly used to introduce positive and negative circuits to supply power to each heating strip 21 in the heating layer 2. Specifically, it can be electrically connected to an external heating module, operated under the control of the vehicle system, and the overall heating power can be controlled by adjusting the current.

[0026] Based on the above-described process of the present invention, specifically, the first substrate layer 1 and the second substrate layer 4 are made of polyester fiber or non-woven fabric, with non-woven fabric being preferred due to its lightweight, good flexibility, stable heat resistance, and low cost, which can meet the requirements of repeated bending, pressure, and heat exposure during long-term use of automotive seats. The first substrate layer 1 and the second substrate layer 4, in the form of inner and outer film layers, shape the internal heating layer 2 and conductive layer 3, and provide protection.

[0027] Furthermore, the heating strip 21 is made of graphene, a mature resistance heating material in the industry. It has excellent conductivity and heating efficiency, and can achieve rapid heating and uniform heating at a low operating voltage. Its layered structure makes the heating strip thin and flexible, which is beneficial for bonding with the non-woven fabric substrate. Specifically, the heating strips 21 in this application have open cutouts between each other, and the cutouts allow for bending without resistance, further enhancing the overall flexibility.

[0028] In the conductive layer 3 of this embodiment, the first electrode strip 31 serves as the positive electrode circuit and is connected to the positive terminal of the heating strip 21, and the second electrode strip 32 serves as the negative electrode circuit and is connected to the negative terminal of the heating strip 21, so that each heating strip 21 forms a complete circuit path.

[0029] In other words, in the solution of this invention, multiple heating strips 21 can be connected in parallel by two independent circuits, significantly reducing circuit costs. Furthermore, the overall structure is hollowed out, resulting in good flexibility and ventilation. Specifically, in the process of this invention, multiple heating strips 21 themselves exist in parallel as the main skeleton of the heating area. The first electrode strip 31 and the second electrode strip 32 can be used as positive and negative electrodes, positioned adjacent to the edges of the corresponding heating areas. Each end of each heating strip 21 is connected to its corresponding circuit, significantly reducing circuit length and controlling costs. Moreover, based on the aforementioned layered structure of this invention, the positions between every two adjacent heating strips 21 can be hollowed out, significantly improving the overall flexibility and ventilation of the heating device, indirectly improving product quality and overall passenger comfort.

[0030] In the manufacturing process of this invention, the projected dimensions of the first substrate layer 1 and the second substrate layer 4 are equal. Specifically, the heating layer 2 and the conductive layer 3 need to completely cover the maximum area enclosed by the first substrate layer 1 and the second substrate layer 4 to maintain their protective function for the internal structure.

[0031] In the specific assembly stage, after the step of "stamping the heating device and cutting away the waste material 22, the first substrate layer 1, and the second substrate layer 4 between every two adjacent heating strips 21", a mesh layer is attached to the side of the second substrate layer 4 away from the first substrate layer 1. Then, the mesh layer is oriented towards the human body, and the heating device is sewn into the car seat. The mesh layer can be made of a lightweight fabric with good breathability, physical strength, and temperature resistance. Specific materials can include polyester fiber, nylon, etc. It has 3D perforations on both sides or the side facing the occupant, which can play a role in uniform heat dissipation. On the one hand, it provides thermal insulation to the seat foam side to prevent heat loss; on the other hand, it maintains a certain cushioning effect when the seat is deformed by pressure from the occupant's back and legs, ensuring temperature uniformity in the overall heating or ventilation function, thus protecting and improving comfort.

[0032] The following Examples 1-3 are preferred process schemes provided by this application to meet the heating balance requirements.

[0033] Example 1 In this embodiment, in the step "applying a heating layer 2 to the surface of the first substrate layer 1, wherein the heating layer 2 is composed of a plurality of heating strips 21 arranged at intervals, each heating strip 21 having a positive end and a negative end arranged opposite to each other", the interval between two adjacent heating strips 21 is adjusted according to the different length distances between the positive and negative ends of each heating strip 21. Specifically, the greater the length distance between the positive and negative ends of the heating strip 21, the closer the interval between two adjacent heating strips 21 is; conversely, the closer the length distance between the positive and negative ends of the heating strip 21, the greater the interval between two adjacent heating strips 21 is, so that the heating amount in any unit area covered by the heating layer 2 is the same.

[0034] Specifically, the multiple heating strips 21 in this application are connected in parallel. Considering that according to Joule's law, the resistance of the heating strip 21 increases as the distance increases, resulting in a decrease in current and a decrease in heating effect, in order to ensure that the total power does not decrease and the heating is uniform, in the embodiments of this application, considering the actual structural stability, and with the length of the heating strip 21 remaining constant, the arrangement density of the heating strips 21 is increased in the region of the heating layer 2 where the heating strip 21 is longer, so that the spacing between two adjacent heating strips 21 is closer, in order to ensure the compensation of heating power.

[0035] This solution addresses the issue of balancing heating power in areas with different spacing by directly adjusting the arrangement density of the heating strips 21.

[0036] Example 2 In this embodiment, in the step "applying a heating layer 2 to the surface of the first substrate layer 1, wherein the heating layer 2 is composed of a plurality of heating strips 21 arranged at intervals, each heating strip 21 having a positive end and a negative end arranged opposite to each other", the width of the heating strip 21 is adjusted according to the different length distance between the positive end and the negative end of each heating strip 21. Specifically, the greater the length distance between the positive end and the negative end of the heating strip 21, the larger the width of the corresponding heating strip 21; the closer the length distance between the positive end and the negative end of the heating strip 21, the smaller the width of the corresponding heating strip 21, so that the heating amount in any unit area covered by the heating layer 2 is the same.

[0037] Similarly, as the distance increases, the resistance of the heating strip 21 increases, resulting in a decrease in current and a decrease in heating effect. In this embodiment, when the length of the heating strip 21 remains limited, the cross-sectional area of ​​a single heating strip 21 is increased in the region of the heating layer 2 where the heating strip 21 is longer. In fact, when the overall thickness of the heating device is also limited, this is directly reflected in increasing the width of the corresponding heating strip 21, so that it can pass more current and thus generate more heat.

[0038] This solution addresses the heating power balance issue in different spacing areas by directly adjusting the cross-sectional area of ​​the heating strip 21 to control the current flowing through it.

[0039] Example 3 In this embodiment, in conjunction with Embodiment 1 and Embodiment 2, the spacing between the heating strips 21 in the corresponding heating layer 2 and the width of the corresponding heating strips 21 are adjusted to solve the heating power balance problem.

[0040] The specific scheme is as follows: the greater the distance between the positive and negative ends of the heating strip 21, the closer the interval between two adjacent heating strips 21, and the larger the width of the corresponding heating strip 21; conversely, the closer the distance between the positive and negative ends of the heating strip 21, the greater the interval between two adjacent heating strips 21, and the smaller the width of the corresponding heating strip 21. The statement that the heating amount per unit area is the same refers to the fact that within any equal-area section of the horizontal projection area covered by the heating layer 2, the heating amount is equal.

[0041] The following Example 4 illustrates the process of a special heating device structure layout.

[0042] Example 4 In this embodiment, the first substrate layer 1 is divided into a symmetrically arranged first heating region 12 and a second heating region 13, and an equal number of heating strips 21 are provided in the first heating region 12 and the second heating region 13. Specifically, considering the symmetry of a typical seat, this embodiment divides the left and right sides of the seat into a symmetrically or mirror-imagely arranged first heating region 12 and second heating region 13. The heating layer 2 portion is provided with an equal number of heating strips 21 in the first heating region 12 and the second heating region 13, and a gap space for the second electrode strip 32 is provided at the position between the first heating region 12 and the second heating region 13. Space for the first electrode strip 31 is provided on the outer periphery of the opposite sides of the first heating region 12 and the second heating region 13.

[0043] Specifically, in the step "a conductive layer 3 is attached to the surface of the first substrate layer 1, wherein the conductive layer 3 includes a first electrode strip 31 and a second electrode strip 32, the first electrode strip 31 connects the positive terminals of each heating strip 21 in series, and the second electrode strip 32 connects the negative terminals of each heating strip 21 in series, so that all the heating strips 21 are connected in parallel", the first electrode strip 31 is arranged along the edge of the first substrate layer 1, and the second electrode strip 32 is arranged along the middle position between the first heating area 12 and the second heating area 13. That is to say, in this application, the first electrode strip 31 surrounds the periphery of the overall heating structure, and the second electrode strip 32 is arranged in the center of the heating structure, which is a completely enclosed structure of the heating layer 2. In terms of materials, the conductive layer 3 does not involve the main heating areas 12 and 13 used for heating, so the material cost is relatively lower, and the main part is arranged vertically, which has higher load-bearing toughness under bending.

[0044] The following embodiment 5 describes the overall layout process with structural holes 11.

[0045] Example 5 In this embodiment, in the step of "providing a first substrate layer 1", a plurality of structural holes 11 are processed on the first substrate layer 1. In the step of "attaching a heating layer 2 to the surface of the first substrate layer 1, wherein the heating layer 2 is composed of a plurality of heating strips 21 arranged at intervals, and each heating strip 21 has a positive end and a negative end arranged opposite to each other", each heating strip 21 adjacent to the structural hole 11 is attached to the edge of the structural hole 11.

[0046] The structural hole 11 serves as a clearance hole for the structural design of other components, such as seat ventilation structures. Its position needs to be hollowed out to avoid any structural obstruction.

[0047] In the process of this invention, for the treatment of the structural hole 11, a heating strip 21 is branched into two sub-heating strips, or two heating strips 21 are wrapped around each other, passing over the edge of the structural hole 11, thereby reinforcing the heating at the structural hole 11. Furthermore, there are multiple structural holes 11, spaced apart on the first substrate layer 1. Due to the special covering of the multiple structural holes 11, to ensure uniform overall heat power, in this embodiment, the multiple heating strips 21 in the heating layer 2 are actually arranged in a wavy, diffractive distribution influenced by the position and size of the structural holes 11, so as to achieve the most uniform heating effect for the overall structure.

[0048] Furthermore, the aforementioned wavy structure of multiple heating strips 21 possesses strong extensibility, providing better toughness. Simultaneously, its longer length allows for flexible adjustment of the heating strip 21's length in specific design. Specifically, in practical design, the length of the heating strip 21 can be controlled by adjusting the amplitude of the wavy shape, thereby avoiding the limitation on the dimensions between the first electrode strip 31 and the second electrode strip 32.

[0049] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made based on the content of the present invention specification and drawings are included in the scope of the patent application of the present invention.

[0050] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0051] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A method for manufacturing a low-cost car seat heating device, characterized in that, The method for manufacturing the heating device includes the following steps: Provide a first substrate layer; A heating layer is attached to the surface of the first substrate layer, wherein the heating layer consists of a plurality of spaced heating strips and waste material between the heating strips, and each heating strip has a positive end and a negative end that are arranged opposite to each other; A conductive layer is attached to the surface of the first substrate layer, wherein the conductive layer includes a first electrode strip and a second electrode strip, the first electrode strip connects the positive terminals of each heating strip in series, and the second electrode strip connects the negative terminals of each heating strip in series, so that all the heating strips are connected in parallel. A second substrate layer is attached to the heating layer and the heat-conducting layer on the side opposite to the first substrate layer. The surface of the heating device is hot-pressed to bond the first substrate layer and the second substrate layer together. The heating device is stamped to cut away the waste material, the first substrate layer, and the second substrate layer between every two adjacent heating bars.

2. The method for manufacturing the low-cost car seat heating device according to claim 1, characterized in that: In step "applying a heating layer to the surface of the first substrate layer, wherein the heating layer is composed of a plurality of heating strips arranged at intervals, each heating strip having a positive end and a negative end arranged opposite each other", the spacing between two adjacent heating strips is adjusted according to the different length distances between the positive and negative ends of each heating strip. The greater the distance between the positive and negative ends of the heating strip, the closer the interval between two adjacent heating strips; conversely, the closer the distance between the positive and negative ends of the heating strip, the greater the interval between two adjacent heating strips, so that the heating amount in any unit area covered by the heating layer is the same.

3. The method for manufacturing the low-cost car seat heating device according to claim 1, characterized in that: In step "applying a heating layer to the surface of the first substrate layer, wherein the heating layer is composed of a plurality of heating strips arranged at intervals, each heating strip having a positive end and a negative end arranged opposite each other", the width of the heating strip is adjusted according to the different length distance between the positive and negative ends of each heating strip. The greater the distance between the positive and negative ends of the heating strip, the wider the corresponding heating strip; conversely, the closer the distance between the positive and negative ends of the heating strip, the smaller the corresponding heating strip, so that the heating amount in any unit area covered by the heating layer is the same.

4. The method for manufacturing the low-cost car seat heating device according to claim 1, characterized in that: In the step "applying a heating layer to the surface of the first substrate layer, wherein the heating layer is composed of a plurality of heating strips arranged at intervals, and each heating strip has a positive end and a negative end arranged opposite to each other", the first substrate layer is divided into a first heating region and a second heating region arranged symmetrically, and an equal number of heating strips are provided in the first heating region and the second heating region.

5. The method for manufacturing the low-cost car seat heating device according to claim 4, characterized in that: In the step "a conductive layer is attached to the surface of the first substrate layer, wherein the conductive layer includes a first electrode strip and a second electrode strip, the first electrode strip connects the positive terminals of each heating strip in series, and the second electrode strip connects the negative terminals of each heating strip in series, so that all the heating strips are connected in parallel", the first electrode strip is arranged along the edge of the first substrate layer, and the second electrode strip is arranged along the middle position between the first heating area and the second heating area.

6. The method for manufacturing a low-cost car seat heating device according to claim 1, characterized in that: The projected dimensions of the first substrate layer and the second substrate layer are equal.

7. The method for manufacturing a low-cost car seat heating device according to claim 1, characterized in that: In the step "providing a first substrate layer", a plurality of structural holes are processed on the first substrate layer. In the step "attaching a heating layer to the surface of the first substrate layer, wherein the heating layer is composed of a plurality of heating strips arranged at intervals, and each heating strip has a positive end and a negative end arranged opposite to each other", each heating strip adjacent to the structural hole is attached to the edge of the structural hole.

8. The method for manufacturing a low-cost car seat heating device according to claim 7, characterized in that: The number of structural holes is multiple, and the multiple structural holes are spaced apart on the first substrate layer.

9. The method for manufacturing a low-cost car seat heating device according to claim 1, characterized in that: The first substrate layer and the second substrate layer are made of polyester fiber or non-woven fabric, and the heating strip is made of graphene.

10. The method for manufacturing a low-cost car seat heating device according to claim 1, characterized in that: After step "stamping the heating device and cutting away the waste material, the first substrate layer, and the second substrate layer between every two adjacent heating strips", a mesh layer is attached to the side of the second substrate layer away from the first substrate layer. Then, the mesh layer is oriented towards the human body, and the heating device is sewn into the car seat.

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