Electric heating glass and vehicle

Abstract

The invention provides electric heating glass and a vehicle. Comprising a glass body, a first bus, a second bus, a shielding layer and a plurality of first heating structures, the glass body comprises a front windshield and a skylight glass area which are connected, and the front windshield glass area is provided with a visible area; the first bus and the second bus are connected to the glass body, located on the edge, away from the skylight glass area, of the front windshield area and spaced from the visible area, and the first bus and the second bus are arranged in the width direction of the glass body at intervals and are opposite in polarity. The shielding layer is connected to the outer edge of the glass body, is spaced from the visible area and covers the first bus and the second bus; the first heating structures are connected to the glass body at intervals and located in the front windshield area, one ends of the first heating structures are electrically connected with the first bus, the other ends of the first heating structures are electrically connected with the second bus, and the first heating structures are sequentially arranged between the first bus and the second bus at intervals in a layer-by-layer nested mode. According to the technical scheme, defrosting and demisting can be achieved on the premise that the appearance and the view of a driver are not affected.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to an electrically heated glass and a vehicle. Background Art

[0002] In cold weather, the surface of car glass is prone to fogging or even frosting, especially for the front windshield of the car. Fogging and frosting will seriously affect the driver's vision and pose a great safety hazard. Therefore, electric heating elements are usually installed in the glass to heat the glass to achieve the purpose of defogger or defrost.

[0003] The panoramic large windshield is a large curved unobstructed windshield that is one piece in one piece. Compared with ordinary windshields, the panoramic large windshield has a larger area and better aesthetics, which can bring users a good visual experience. At present, if the entire glass of the panoramic large windshield is heated, the defogger and defrost performance is poor because the heating circuit is much longer than that of ordinary windshields. If only the windshield is heated, the busbar will be exposed because there is no shielding in the middle transition area, resulting in a poor appearance and easily affecting the driver's field of vision. Summary of the invention

[0004] The embodiments of the present application provide an electrically heated glass that can meet the requirements of defogger and defrost without affecting the appearance and the driver's field of vision.

[0005] In a first aspect, the present application provides an electrically heated glass, the electrically heated glass comprising:

[0006] A glass body, the glass body comprising a front windshield area and a sunroof glass area connected to each other, the front windshield area having a visible area;

[0007] a first busbar and a second busbar, wherein the first busbar and the second busbar are connected to the glass body and are located at an edge of the windshield area away from the sunroof glass area and are spaced apart from the visual area, the first busbar and the second busbar are spaced apart in a width direction of the glass body, and the polarity of the first busbar is opposite to that of the second busbar;

[0008] a shielding layer, the shielding layer being connected to the outer edge of the glass body and spaced apart from the visible area, the shielding layer covering the first bus bar and the second bus bar; and

[0009] A plurality of first heating structures are provided, wherein the plurality of first heating structures are connected to the glass body and are located in the windshield area, wherein one end of each of the first heating structures is electrically connected to the first bus bar, and the other end of each of the first heating structures is electrically connected to the second bus bar, and the plurality of first heating structures are sequentially spaced and nested between the first bus bar and the second bus bar, and at least one of the first heating structures crosses the visible area along the length direction of the glass body.

[0010] It is understandable that when the electrically heated glass is used as a panoramic windshield, if the entire electrically heated glass is heated, that is, the entire glass of the panoramic windshield is heated, since the total length of the heating structure of the panoramic windshield is much longer than that of the conventional windshield, the heating performance will be very poor, and the defrosting and defogging effects will be poor. If a busbar is added at the middle connection between the windshield area and the sunroof glass area of ​​the electrically heated glass, although only the windshield area can be heated, this solution will expose the busbar at the middle connection, affecting the appearance of the electrically heated glass and the driver's field of vision.

[0011] Therefore, in the embodiment of the present application, the first busbar and the second busbar are located at the edge of the windshield area away from the sunroof glass area, and the first heating structure is bent and extended between the first busbar and the second busbar, and passes through the visible area. On the basis that the heating performance of the first heating structure meets the working requirements, the first heating structure can be folded, so that the first heating structure is entirely located in the windshield area, so that it only heats the windshield area. Moreover, the first busbar and the second busbar can also be shielded by a shielding layer so that the first busbar and the second busbar are not exposed, which is beneficial to improving the appearance performance of the electrically heated glass and providing the driver and passengers with a good field of vision. In addition, the first heating structure is bent and extended between the first busbar and the second busbar. This arrangement allows the first heating structure to have a larger length adjustment range according to the needs of the electrically heated glass.

[0012] In a possible implementation manner, the visual area includes a first visual area and a second visual area, the visual range of the second visual area includes the visual range of the first visual area, and each of the first heating structures includes a first section, a second section, and a third section;

[0013] One end of the first segment is connected to the first busbar, and the other end of the first segment is connected to one end of the second segment. The first segment extends along the length direction of the glass body, and at least one of the first segments spans the first viewing area and the second viewing area.

[0014] The other end of the second segment is connected to one end of the third segment, the second segment extends along the width direction of the glass body, and in the length direction of the glass body, the second segment and the first generatrix are respectively located at two opposite sides of the second viewing area;

[0015] The other end of the third segment is connected to the second bus bar, the third segment extends along the length direction of the glass body, and at least one of the third segments spans the first viewing area and the second viewing area.

[0016] In a possible implementation, the spacing between two adjacent second segments is in the range of 1 mm-d2 mm, wherein d2 is the length of the second segment of one of the first heating structures located in the innermost circle among the multiple first heating structures along the width direction of the glass body.

[0017] In a possible implementation manner, the first busbar, the second busbar and any one of the first heating structures form a first heating loop;

[0018] The multiple first heating circuits are arranged from the inside to the outside in the order from the central area of ​​the first viewing area and the second viewing area to the edge area of ​​the first viewing area and the second viewing area. Among the two adjacent first heating circuits, the length of the first heating circuit located in the inner circle is shorter than the length of the other first heating circuit located in the outer circle.

[0019] In a possible implementation manner, an area enclosed by a projection of one of the first heating circuits located in an outermost circle among the plurality of the first heating circuits on the glass body covers the second viewing area.

[0020] In a possible implementation manner, an edge of the windshield region away from the sunroof glass region is a first edge of the glass body, an edge of the sunroof glass region away from the windshield region is a second edge of the glass body, and the first edge and the second edge are arranged opposite to each other in the length direction of the glass body;

[0021] The first busbar and the second busbar are close to the first edge;

[0022] Among the multiple first heating circuits, the length of the first heating circuit located in the innermost circle is less than or equal to the distance between the first edge and the second edge, and / or, among the multiple first heating circuits, the length of the first heating circuit located in the outermost circle is less than or equal to the distance between the first edge and the second edge.

[0023] In a possible implementation manner, when the length of the first heating loop is greater than a preset length, the shape of the first heating loop is a straight line, and when the length of the first heating loop is less than the preset length, the shape of the first heating loop is a wave shape;

[0024] The preset length is the length of the glass body×the first ratio×the second ratio, the ratio of the first ratio is in the range of 0.2-1, and the ratio of the second ratio is in the range of 1.35-1.4.

[0025] In a possible implementation manner, the ratio of the first ratio is in the range of 0.44-0.67.

[0026] In a possible implementation manner, the length of the glass body is in the range of 1200 mm-2500 mm.

[0027] In a possible implementation manner, the length of the glass body is in the range of 1500 mm-1800 mm.

[0028] In a possible implementation manner, the electrically heated glass further includes a third busbar, the third busbar is connected to the glass body, is located at the edge of the windshield area, and is spaced apart from the visual area, the third busbar is spaced apart from the second busbar in the width direction of the glass body, and is located on both sides of the second busbar with the first busbar, respectively, and the polarity of the third busbar is opposite to that of the second busbar;

[0029] The electrically heated glass also includes a second heating structure, which is connected to the glass body and located in the windshield area, and is spaced apart from the first heating structure in the width direction of the glass body. One end of the second heating structure is electrically connected to the second bus bar, and the other end of the first heating structure is electrically connected to the third bus bar. The first heating structure bends and extends between the second bus bar and the third bus bar and crosses the visible area.

[0030] In one possible implementation, the second bus bar includes a first sub-bus bar and a second sub-bus bar, the first sub-bus bar and the second sub-bus bar are spaced apart in the width direction of the glass body and have the same polarity, and one of the first sub-bus bar and the second sub-bus bar is electrically connected to the first heating structure, and the other is electrically connected to the second heating structure.

[0031] In a second aspect, the present application also provides a vehicle, comprising a body sheet metal and the electrically heated glass as described above, wherein the electrically heated glass is connected to the body sheet metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a possible structural schematic diagram of a vehicle provided in an embodiment of the present application;

[0033] Figure 2 is another possible structural schematic diagram of a vehicle provided in an embodiment of the present application;

[0034] Figure 3 This is a schematic diagram of a cross-sectional structure of an electrically heated glass provided in an embodiment of the present application;

[0035] Figure 4 is along Figure 3 A schematic cross-sectional view of a partial structure of a glass body obtained by cutting along the section line AA shown;

[0036] Figure 5 is along Figure 3 Another schematic cross-sectional view of a partial structure of the glass body obtained by cutting along the section line AA shown;

[0037] Figure 6 is along Figure 3 Another schematic cross-sectional view of a partial structure of the glass body obtained by cutting along the section line AA shown;

[0038] Figure 7 is another schematic cross-sectional structure diagram of the electrically heated glass provided in an embodiment of the present application;

[0039] Figure 8 This is another schematic cross-sectional structure diagram of the electrically heated glass provided in the embodiments of the present application.

[0040] Reference numerals:

[0041] Vehicle 200, electrically heated glass 100, body sheet metal 210, glass body 10, first busbar 20, second busbar 30, third busbar 40, edge busbar 50, first heating structure 60, second heating structure 70, windshield area 101, sunroof glass area 102, outer glass plate 11, inner glass plate 12, middle layer 13, shielding layer 14, first surface 111, second surface 112, third surface 121, fourth surface 122, first viewing area 110, second viewing area 120, third viewing area 130, fourth viewing area 140, first heating circuit C1, second heating circuit C2, first edge 150, second edge 160, first sub-busbar 31, second sub-busbar 32, first section 61, second section 62, third section 63, fourth section 71, fifth section 72, sixth section 73. DETAILED DESCRIPTION

[0042] For ease of understanding, the terms involved in the embodiments of the present application are first explained.

[0043] And / or: It is just a way to describe the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0044] Multiple: refers to two or more than two.

[0045] Connection: should be understood in a broad sense. For example, A and B are connected, which can be either direct or indirect through an intermediary.

[0046] The specific implementation of the present application will be clearly described below in conjunction with the accompanying drawings.

[0047] Embodiments of the present application provide an electrically heated glass and a vehicle.

[0048] Please refer to Figure 1 and Figure 2 , Figure 1 is a possible structural diagram of a vehicle 200 provided in an embodiment of the present application, Figure 2 It is another possible structural schematic diagram of the vehicle 200 provided in an embodiment of the present application.

[0049] The vehicle 200 may include an electrically heated glass 100 and a body sheet metal 210. The electrically heated glass 100 is connected to the body sheet metal 210. Figure 1 As shown, the electrically heated glass 100 may be the front windshield of the vehicle 200. Alternatively, as Figure 2 As shown, the electrically heated glass 100 may also be a panoramic front windshield.

[0050] Among them, the panoramic front windshield can be an integrated structure formed by connecting the front windshield and the sunroof glass. The panoramic front windshield is a one-piece large curved unobstructed windshield. Compared with the conventional front windshield, the panoramic front windshield can bring a better visual experience to the user and is widely welcomed. Although the panoramic front windshield is an integrated structure, from the perspective of position, the panoramic front windshield can be divided into two parts: the front windshield area and the sunroof glass area.

[0051] It is understandable that in cold weather, the surface of the car window glass is prone to fogging and / or frosting, which seriously affects the driver's vision and poses a great safety hazard. Therefore, the car window glass needs to have a certain heating performance so that the driver can see in cold weather.

[0052] It should be noted that Figure 1 and Figure 2The purpose is only to schematically describe the connection relationship between the vehicle 200 and the electrically heated glass 100, and it is not to specifically limit the connection position, specific structure and quantity of each device. The vehicle 200 may include more or less components than shown in the figure, or combine some components, or split some components, or arrange the components differently.

[0053] The following description will take the electrically heated glass 100 as a panoramic front windshield as an example, but it should be understood that the invention is not limited thereto.

[0054] It is understandable that in the related art, electrically heated glass is generally heated by heating wires. The heating wires satisfy the formula: P = U2 / R and R = ρ×L / S, where P is power, U is voltage, R is resistance, ρ is the resistivity of the material, L is the length of the conductor, and S is the cross-sectional area of ​​the conductor. According to the formula of the power and resistance of the heating wire, it can be seen that the greater the length L of the heating wire, the greater the resistance R, the smaller the power P, and the worse the heating performance.

[0055] Therefore, if the electrically heated glass is a panoramic windshield, and the entire glass of the panoramic windshield is heated, since the heating circuit of the panoramic windshield is much longer than that of a conventional windshield, based on the rule that the longer the heating wire is, the worse the heating performance of the heating wire is, the defogger and defrost effects of the glass will be poor. If a busbar is added at the middle connection between the windshield area and the sunroof glass area of ​​the panoramic windshield, only the windshield can be heated like a conventional windshield. However, the disadvantage of this solution is that when the middle connection between the windshield area and the sunroof glass area is not shielded, the busbar will be exposed, affecting the appearance of the glass and the driver's field of vision.

[0056] Based on this, the embodiment of the present application provides an electrically heated glass 100 that can meet the heating performance requirements without affecting the appearance of the glass and the driver's field of vision.

[0057] See also Figure 3 , Figure 3 It is a schematic diagram of a cross-sectional structure of the electrically heated glass 100 provided in an embodiment of the present application.

[0058] The electrically heated glass 100 may include a glass body 10, a first busbar 20, a second busbar 30, a third busbar 40, an edge busbar 50, a first heating structure 60, and a second heating structure 70. The glass body 10 may include a windshield region 101 and a sunroof glass region 102. The sunroof glass region 102 is connected to one side of the windshield region 101. The glass body 10 is a panoramic windshield. The windshield region 101 of the glass body 10 may correspond to a conventional windshield, and the sunroof glass region 102 of the glass body 10 may correspond to a conventional sunroof glass. The first busbar 20, the second busbar 30, the third busbar 40, the first heating structure 60, and the second heating structure 70 are all connected to the glass body 10 and located in the windshield region 101 of the glass body 10, and the edge busbar 50 is connected to the glass body 10 and located in the sunroof glass region 102 of the glass body 10.

[0059] In some embodiments, the electrically heated glass 100 may also be without the edge bus bar 50 , and / or without the second heating structure 70 and the third bus bar 40 .

[0060] See also Figure 4 , Figure 4 is along Figure 3 The section line AA shown is a schematic cross-sectional view of a partial structure of the glass body 10. The glass body 10 may include an outer glass plate 11, an inner glass plate 12, and an intermediate layer 13. The outer glass plate 11, the intermediate layer 13, and the inner glass plate 12 are stacked in sequence. A portion of the outer glass plate 11, a portion of the inner glass plate 12, and a portion of the intermediate layer 13 together constitute a front windshield area 101 of the glass body 10, and another portion of the outer glass plate 11, another portion of the inner glass plate 12, and another portion of the intermediate layer 13 together constitute a sunroof glass area 102 of the glass body 10.

[0061] The outer glass plate 11 may include a first surface 111 and a second surface 112. The first surface 111 is a surface of the outer glass plate 11 facing the outside of the vehicle 200, that is, the appearance surface of the glass body 10. The second surface 112 is a surface of the outer glass plate 11 facing the inside of the vehicle 200. Exemplarily, the outer glass plate 11 may be prepared by a high-temperature bending molding process of at least 500°C. The thickness of the outer glass plate 11 may be in the range of 1.6mm-5.0mm (including the end values ​​1.6mm and 5.0mm). For example, the thickness of the outer glass plate 11 may be 1.6mm, 1.8mm, 2.1mm, 2.6mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, etc. Preferably, the thickness of the outer glass plate 11 may be 1.8mm, 2.1mm. The material of the outer plate glass may be white glass, ordinary green glass, solar green glass, etc.

[0062] The inner glass plate 12 may include a third surface 121 and a fourth surface 122. The third surface 121 is a surface of the inner glass plate 12 facing the outside of the vehicle 200. The fourth surface 122 is a surface of the inner glass plate 12 facing the inside of the vehicle 200. The third surface 121 of the inner glass plate 12 may be arranged opposite to the second surface 112 of the outer glass plate 11. Exemplarily, the inner glass plate 12 may be prepared by a high-temperature bending process of at least 500°C. The thickness of the inner glass plate 12 may be in the range of 0.7mm-5.0mm (including the end values ​​of 0.7mm and 5.0mm). For example, the thickness of the inner glass plate 12 may be 0.7mm, 1.1mm, 1.6mm, 1.8mm, 2.1mm, 2.6mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, etc. Preferably, the thickness of the inner glass plate 12 may be 1.8mm, 2.1mm. The material of the inner glass plate 12 can be white glass, ordinary green glass, solar green glass, etc.

[0063] The intermediate layer 13 is connected between the second surface 112 of the outer glass plate 11 and the third surface 121 of the inner glass plate 12, and is used to connect the outer glass plate 11 and the inner glass plate 12. The intermediate layer 13 may be a single-layer structure or a multi-layer structure, and the multi-layer structure may be a double-layer structure, a three-layer structure, a four-layer structure, a five-layer structure, etc. Exemplarily, the intermediate layer 13 may be a thermoplastic intermediate layer 13. The material of the intermediate layer 13 may be polycarbonate (PC), polyvinyl chloride (PVC), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyacrylate (PA), polymethyl methacrylate (PMMA), polyurethane (PUR) or ionomer film (Sentry Glas Plus, SGP), etc.

[0064] The middle layer 13 also has many functional roles, and includes at least one or more of the following functions:

[0065] In the first aspect, the middle layer 13 may include at least one tinted area, and the tinted area plays a shielding role. The embodiment of the present application does not strictly require the position of the tinted area in the middle layer 13, and it can be any position that meets the use requirements of the electrically heated glass 100. Exemplarily, a tinted area can be set at the top of the front windshield area 101 as a shadow band, thereby reducing the interference of sunlight to the human eye, wherein the top of the front windshield area 101 is the position of the front windshield area 101 close to the sunroof glass area 102. Alternatively, a colored area can be set at the bottom of the front windshield area 101 to play a shielding role, wherein the bottom of the front windshield area 101 is the position of the front windshield area 101 away from the sunroof glass area 102. Alternatively, a tinted area can be set at both the top and bottom of the front windshield area 101, and a transparent area can be set in the area between the top and bottom of the front windshield area 101, and this transparent area can be spliced ​​by two or three layers of film.

[0066] Secondly, during the preparation of the intermediate layer 13, an infrared absorber can be added so that the intermediate layer 13 has the function of absorbing heat and light. This infrared absorber can not only block the light irradiating into the car, but also reduce the temperature inside the car by blocking the sunlight, thereby achieving the effect of absorbing light and absorbing heat.

[0067] In the third aspect, for the intermediate layer 13 having a multilayer structure, it may include at least two functional layers. The functional layer may be used as a sound insulation function or a head-up display function. For example, at least one of the two layers has a higher plasticizer content so as to have a sound insulation function. Alternatively, at least one of the two layers is wedge-shaped so as to have a head-up display function. In the design process of the head-up display system of the vehicle 200, the problem of ghosting is often encountered. This is because the front windshield area 101 is a double-layer glass, and the light of the head-up display system is projected onto the electrically heated glass 100, which will form two optical reflections on the outer glass plate 11 and the inner glass plate 12, and will produce ghosting when irradiated to the human eye. The existence of ghosting will not only reduce the image quality, but also bring dizziness to the viewer, affect the driver's driving experience, and create safety hazards. Setting the intermediate layer 13 to a wedge shape can play a role similar to an optical prism, changing the propagation direction of the reflected light, and avoiding the formation of image ghosting.

[0068] See also Figure 3In an embodiment of the present application, the front windshield area 101 may have a visible area (not marked in the figure). Among them, the visible area may include a first viewing area 110, a second viewing area 120, a third viewing area 130 and a fourth viewing area 140. The viewing range of the second viewing area 120 includes the viewing range of the first viewing area 110, and the center of the first viewing area 110 and the center of the second viewing area 120 are arranged to coincide. The viewing range of the fourth viewing area 140 includes the viewing range of the third viewing area 130, and the center of the third viewing area 130 and the center of the fourth viewing area 140 are arranged to coincide. The first viewing area 110 and the second viewing area 120 are mirror-imaged with the third viewing area 130 and the fourth viewing area 140 along the width direction of the glass body 10.

[0069] The first viewing area 110 and the second viewing area 120 , the third viewing area 130 and the fourth viewing area 140 are determined according to the provisions of the standard ECE R43 or GB 11562.

[0070] Please refer to Figure 5 and Figure 6 , Figure 5 is along Figure 3 Another schematic cross-sectional view of a partial structure of the glass body 10 obtained by cutting along the section line AA is shown. Figure 6 is along Figure 3 The illustrated cross-sectional view is another schematic cross-sectional view of a portion of the structure of the glass body 10 cut along the section line AA.

[0071] The glass body 10 may further include a shielding layer 14. The shielding layer 14 may be connected to the glass body 10, and may be located at the outer edge of the glass body 10, and may extend along the circumferential direction of the glass body 10. The shielding layer 14 may be disposed around the outer edge of the glass body 10 in a whole circle. Alternatively, the shielding layer 14 may be disposed at one or more edges of the outer edge of the glass body 10. The shielding layer 14 may be disposed at intervals from the visible area, and may cover the first busbar 20, the second busbar 30, the third busbar 40, and the edge busbar 50.

[0072] Specifically, if Figure 5 As shown, the shielding layer 14 can be provided on the second surface 112 of the outer glass plate 11. The shielding layer 14 is located outside the first viewing area 110, the second viewing area 120, the third viewing area 130 and the fourth viewing area 140 to avoid blocking the vision of the driver and passengers. Alternatively, the shielding layer 14 is located outside the third viewing area 130 and the fourth viewing area 140. Alternatively, as Figure 6 As shown, the shielding layer 14 may be provided on the fourth surface 122 of the inner glass plate 12. For example, the material of the shielding layer 14 may be ink. The ink may be ceramic ink or ultraviolet ink.

[0073] It is understandable that by providing a shielding layer 14 on the second surface 112 of the outer glass plate 11 and / or the fourth surface 122 of the inner glass plate 12, the appearance performance of the vehicle 200 can be improved, the components inside the vehicle can be protected, and the local adhesion can be improved.

[0074] Of course, in other embodiments, the intermediate layer 13 having a coloring function may also be used as the shielding layer 14, and there is no strict limitation to this.

[0075] In this embodiment, the visible light transmittance of the shielding layer 14 can be less than or equal to 5.0%. Preferably, the visible light transmittance is less than or equal to 1.5%. The shielding layer 14 can not only block the interference of light to the driver, but also block the busbar and the heating structure to beautify the appearance of the car.

[0076] Please refer again Figure 3 , the glass body 10 may further include a first edge 150 and a second edge 160. The first edge 150 and the second edge 160 are arranged opposite to each other in the length direction of the glass body 10. The first edge 150 may be the lower edge of the windshield area 101, that is, the first edge 150 may be the edge of the windshield area 101 away from the sunroof glass area 102. The second edge 160 may be the upper edge of the sunroof glass area 102, that is, the second edge 160 may be the edge of the sunroof glass area 102 away from the windshield area 101.

[0077] The first busbar 20, the second busbar 30, and the third busbar 40 are all located in the front windshield area 101 and are arranged near the first edge 150 of the glass body 10. The first busbar 20, the second busbar 30, and the third busbar 40 can be arranged in sequence and at intervals along the width direction of the glass body 10. The first busbar 20, the second busbar 30, and the third busbar 40 can be covered by the shielding layer 14, so that the first busbar 20, the second busbar 30, and the third busbar 40 can be shielded by the shielding layer 14 without being exposed, which is conducive to improving the overall heating performance of the electrically heated glass 100. In other words, the orthographic projection of the shielding layer 14 on the glass body 10 can cover the orthographic projection of the first busbar 20 on the glass body 10, the orthographic projection of the second busbar 30 on the glass body 10, and the orthographic projection of the third busbar 40 on the glass body 10. Among them, the polarity of the first busbar 20 is opposite to that of the second busbar 30, and the polarity of the first busbar 20 and the third busbar 40 is the same. For example, the polarity of the first busbar 20 may be positive, the polarity of the second busbar 30 may be negative, and the polarity of the third busbar 40 may be positive. Alternatively, the polarity of the first busbar 20 may be negative, the polarity of the second busbar 30 may be positive, and the polarity of the third busbar 40 may be negative.

[0078] The edge busbar 50 is located in the skylight glass area 102 and is arranged near the second edge 160 of the glass body 10. The edge busbar 50 extends along the width direction of the glass body 10. The edge busbar 50 can be covered by the shielding layer 14, so that the edge busbar 50 can be shielded by the shielding layer 14 and will not be exposed, which is beneficial to improve the overall heating performance of the electrically heated glass 100. In other words, the orthographic projection of the shielding layer 14 on the glass body 10 can cover the orthographic projection of the edge busbar 50 on the glass body 10. The first busbar 20, the second busbar 30 and the third busbar 40 are arranged relative to the edge busbar 50 in the length direction of the glass body 10.

[0079] Among them, in the length direction of the glass body 10, the distance between the first busbar 20, the second busbar 30 and the third busbar 40 and the first edge 150 can be 5mm to 30mm (including the endpoint values ​​of 5mm and 30mm). The distance between the edge busbar 50 and the second edge 160 can be 5mm to 30mm (including the endpoint values ​​of 5mm and 30mm). The materials of the first busbar 20, the second busbar 30, the third busbar 40 and the edge busbar 50 can be metal foil, conductive silver paste, etc. The first busbar 20, the second busbar 30, the third busbar 40 and the edge busbar 50 can be arranged between the outer glass plate 11 and the inner glass plate 12. Exemplarily, the first busbar 20, the second busbar 30, the third busbar 40 and the edge busbar 50 can be arranged between the outer glass plate 11 and the intermediate layer 13. Alternatively, the first busbar 20, the second busbar 30, the third busbar 40 and the edge busbar 50 can be arranged between the inner glass plate 12 and the intermediate layer 13.

[0080] The first heating structure 60 and the second heating structure 70 are both located in the front windshield area 101 and are arranged at intervals along the width direction of the electrically heated glass 100. The first heating structure 60 may correspond to the position of the driver's seat, and the second heating structure 70 may correspond to the position of the co-driver's seat. The first heating structure 60 and the second heating structure 70 may be arranged between the outer glass plate 11 and the inner glass plate 12. Exemplarily, the first heating structure 60 and the second heating structure 70 may be arranged between the outer glass plate 11 and the middle layer 13, or the first heating structure 60 and the second heating structure 70 may be arranged between the inner glass plate 12 and the middle layer 13.

[0081] In addition, the first heating structure 60 and the second heating structure 70 can be heating structures with conductive functions, which can generate heat after being powered on to achieve the defrosting and defogging functions of the electrically heated glass 100. Exemplarily, the first heating structure 60 and the second heating structure 70 can be heating wires, such as tungsten wires, that is, filaments made by forging and drawing tungsten bars. The diameter of the heating wire can be 0.018mm to 0.15mm, preferably, the diameter is 0.018mm to 0.027mm. The resistance of the heating wire can be 33Ω / m to 194Ω / m, preferably, the resistance is 30Ω / m to 194Ω / m. The numerical ranges described above all include endpoint values.

[0082] Please continue reading Figure 3 In this embodiment, one end of the first heating structure 60 is electrically connected to the first busbar 20, and the other end of the first heating structure 60 is electrically connected to the second busbar 30. The first heating structure 60 bends and extends between the first busbar 20 and the second busbar 30. The first heating structure 60, the first busbar 20 and the second busbar 30 together form a first heating loop C1. Exemplarily, the first heating structure 60 may cross the first viewing area 110 and the second viewing area 120.

[0083] It is understandable that when the electrically heated glass 100 is used as a panoramic windshield, if the entire electrically heated glass 100 is heated, that is, the entire glass of the panoramic windshield is heated, since the total length of the heating structure of the panoramic windshield is much longer than that of a conventional windshield, the heating performance will be very poor, and the defogger and defrost effects will be poor. If a busbar is added at the middle connection between the windshield area 101 and the sunroof glass area 102 of the electrically heated glass 100, although only the windshield area 101 can be heated, this solution will expose the busbar at the middle connection, affecting the appearance of the electrically heated glass 100 and the driver's field of vision.

[0084] Therefore, in the embodiment of the present application, by making the first busbar 20 and the second busbar 30 located at the edge of the windshield area 101 away from the sunroof glass area 102 (i.e., located at the first edge 150 of the glass body 10), and making the first heating structure 60 bend and extend between the first busbar 20 and the second busbar 30, and pass through the visible area (i.e., the first visual area 110 and the second visual area 120). On the basis that the heating performance of the first heating structure 60 meets the working requirements, the first heating structure 60 can be folded, so that the first heating structure 60 is completely located in the windshield area 101, so that it only heats the windshield area 101. Moreover, the first busbar 20 and the second busbar 30 can also be shielded by the shielding layer 14, so that the first busbar 20 and the second busbar 30 will not be exposed, which is conducive to improving the appearance performance of the electrically heated glass 100 and allowing the driver and passengers to have a good field of vision. In addition, the first heating structure 60 is bent and extended between the first busbar 20 and the second busbar 30 . This arrangement allows the first heating structure 60 to have a larger length adjustment range according to the requirements of the electrically heated glass 100 .

[0085] The first heating structure 60 may include a first section 61, a second section 62 and a third section 63. The first section 61, the second section 62 and the third section 63 are connected in sequence. One end of the first section 61 is connected to the first busbar 20, and the other end of the first section 61 extends in a direction away from the first busbar 20 and is connected to one end of the second section 62. The first section 61 may extend along the length direction of the glass body 10. The second section 62 is bent and connected to the first section 61, and the second section 62 may extend along the width direction of the glass body 10. The second section 62 is above the boundary line of the first viewing area 110 and the second viewing area 120 to avoid affecting the field of vision of the driver and passengers. Among them, the boundary line of the first viewing area 110 and the second viewing area 120 is the boundary line of the first viewing area 110 and the second viewing area 120 away from the first edge 150 of the glass body 10. In the length direction of the glass body 10, the second section 62 and the first busbar 20 are respectively located on opposite sides of the second viewing area 120. One end of the third segment 63 is connected to the other end of the second segment 62, and the other end of the third segment 63 is connected to the second busbar 30. The third segment 63 may extend along the length direction of the glass body 10. The third segment 63 may be arranged opposite to the first segment 61 in the width direction of the glass body 10. Exemplarily, the extension direction of the third segment 63 may be arranged parallel to the extension direction of the first segment 61.

[0086] The second section 62 is located on the side of the second visual area 120 away from the first busbar 20 and the second busbar 30. It can be understood that the second section 62 is a transverse wire section in the first heating structure 60. By limiting the length of the second section 62, the total extension length of the first heating structure 60 can be controlled to avoid affecting the visual field of the driver and passengers.

[0087] The number of the first heating structures 60 can be multiple. Among them, one end of each first heating structure 60 is electrically connected to the first busbar 20, and the other end of each first heating structure 60 is electrically connected to the second busbar 30. Multiple first heating structures 60 can form multiple first heating loops C1 together with the first busbar 20 and the second busbar 30. That is, the first busbar 20, the second busbar 30 and any first heating structure 60 each form a first heating loop C1. Multiple first heating structures 60 are sequentially spaced and nested between the first busbar 20 and the second busbar 30. At least one first heating structure 60 crosses the visible area along the length direction of the glass body 10. Among them, at least one first section 61 spans the first viewing area 110 and the second viewing area 120. At least one third section 63 spans the first viewing area 110 and the second viewing area 120. Specifically, the first first heating structure 60 is arranged from the side of the first busbar 20 close to the second busbar 30, and then the first heating structure 60 is electrically connected to the side of the second busbar 30 close to the first busbar 20, thereby forming the first first heating loop C1. The first first heating loop C1 is the innermost first heating loop C1. Similarly, the wiring is spaced along the width direction of the glass body 10, and the nth first heating structure 60 is arranged at the outermost edge to form the nth first heating loop C1. The nth first heating loop C1 is the outermost first heating loop C1. The length of the first heating loop C1 gradually increases from the innermost to the outermost. Among them, the length of the first heating loop C1 can be equal to the sum of the length of the first section 61, the length of the second section 62, and the length of the third section 63.

[0088] In other words, the multiple first heating loops C1 are arranged from the inside to the outside in the order from the central area of ​​the first field of view area 110 and the second field of view area 120 to the edge area of ​​the first field of view area 110 and the second field of view area 120, and among the two adjacent first heating loops C1, the length of the first heating loop C1 located in the inner circle is shorter than the length of the other first heating loop C1 located in the outer circle.

[0089] One end of the second heating structure 70 is electrically connected to the second busbar 30, and the other end of the second heating structure 70 is electrically connected to the third busbar 40. The second heating structure 70 bends and extends between the second busbar 30 and the third busbar 40. The second heating structure 70, the second busbar 30 and the third busbar 40 together form a second heating loop C2. Exemplarily, the second heating structure 70 may cross the third viewing area 130 and the fourth viewing area 140.

[0090] It is understandable that in the embodiment of the present application, by making the second busbar 30 and the third busbar 40 located at the edge of the windshield area 101 away from the sunroof glass area 102 (i.e., located at the first edge 150 of the glass body 10), and making the second heating structure 70 bend and extend between the second busbar 30 and the third busbar 40, and pass through the visual area (i.e., the third visual area 130 and the fourth visual area 140). On the basis that the heating performance of the second heating structure 70 meets the working requirements, the second heating structure 70 can be folded, so that the second heating structure 70 is completely located in the windshield area 101, so that it only heats the windshield area 101. Moreover, the second busbar 30 and the third busbar 40 can also be shielded by the shielding layer 14, so that the second busbar 30 and the third busbar 40 will not be exposed, which is conducive to improving the appearance performance of the electrically heated glass 100 and providing the driver and passengers with a good field of vision. In addition, the second heating structure 70 bends and extends between the second busbar 30 and the third busbar 40 . This arrangement allows the second heating structure 70 to have a larger length adjustment range according to the requirements of the electrically heated glass 100 .

[0091] The second heating structure 70 may include a fourth section 71, a fifth section 72 and a sixth section 73. The fourth section 71, the fifth section 72 and the sixth section 73 are connected in sequence. One end of the fourth section 71 is connected to the third busbar 40, and the other end of the fourth section 71 extends in a direction away from the third busbar 40 and is connected to one end of the fifth section 72. The fourth section 71 may extend along the length direction of the glass body 10, and part of the fourth section 71 may be located in the third viewing area 130 and the fourth viewing area 140. The fifth section 72 is bent and connected to the fourth section 71, and the fifth section 72 may extend along the width direction of the glass body 10. The fifth section 72 is above the boundary line between the third viewing area 130 and the fourth viewing area 140 to avoid affecting the field of vision of the driver and passengers. Among them, the boundary line between the third viewing area 130 and the fourth viewing area 140 is the boundary line between the third viewing area 130 and the fourth viewing area 140 away from the first edge 150 of the glass body 10. In the length direction of the glass body 10, the fifth segment 72 and the third busbar 40 are respectively located on opposite sides of the fourth viewing area 140. One end of the sixth segment 73 is connected to the other end of the fifth segment 72, and the other end of the sixth segment 73 is connected to the second busbar 30. The sixth segment 73 may extend along the length direction of the glass body 10 and span the third viewing area 130 and the fourth viewing area 140. The fourth segment 71 may be arranged opposite to the sixth segment 73 in the width direction of the glass body 10. Exemplarily, the extension direction of the sixth segment 73 may be arranged parallel to the extension direction of the fourth segment 71.

[0092] The fifth section 72 is located on the side of the fourth visual field 140 away from the second busbar 30 and the third busbar 40. It can be understood that the fifth section 72 is a transverse wire section in the second heating structure 70. By limiting the length of the fifth section 72, the total extension length of the second heating structure 70 can be controlled to avoid affecting the visual field of the driver and passengers.

[0093] The number of the second heating structures 70 can be multiple. Among them, one end of each second heating structure 70 is electrically connected to the second busbar 30, and the other end of each second heating structure 70 is electrically connected to the third busbar 40. Multiple second heating structures 70 can form multiple second heating loops C2 together with the second busbar 30 and the third busbar 40. That is, the second busbar 30, the third busbar 40 and any second heating structure 70 each form a second heating loop C2. Multiple second heating structures 70 are sequentially spaced and nested between the second busbar 30 and the third busbar 40. At least one first heating structure 60 crosses the visible area along the length direction of the glass body 10. Among them, at least one fourth section 71 spans the third viewing area 130 and the fourth viewing area 140. At least one sixth section 73 spans the third viewing area 130 and the fourth viewing area 140. Specifically, the first second heating structure 70 is arranged from the side of the second busbar 30 close to the third busbar 40, and the second heating structure 70 is electrically connected to the side of the third busbar 40 close to the second busbar 30 to form the first second heating loop C2. The first second heating loop C2 is the innermost second heating loop C2. Similarly, the wiring is spaced along the width direction of the glass body 10, and the nth second heating structure 70 is arranged at the outermost periphery to form the nth second heating loop C2. The nth second heating loop C2 is the outermost second heating loop C2. The total length of the second heating loop C2 gradually increases from the innermost periphery to the outermost periphery. Among them, the length of the second heating loop C2 can be equal to the sum of the length of the fourth section 71, the length of the fifth section 72, and the length of the sixth section 73.

[0094] In a possible application scenario, please continue to see Figure 3 , the polarity of the first busbar 20 is positive, the polarity of the second busbar 30 is negative, and the polarity of the third busbar 40 is positive. The current starts from the first busbar 20 and passes through the first section 61, the second section 62 and the third section 63 in sequence and goes back to the second busbar 30 to form the first heating loop C1. The current starts from the third busbar 40 and passes through the fourth section 71, the fifth section 72 and the sixth section 73 in sequence and goes back to the second busbar 30 to form the second heating loop C2. Afterwards, the first heating structure 60 and the second heating structure 70 generate heat and generate heat under the action of the heating current, so that the electrically heated glass 100 has the functions of defrosting, defogging, deicing, etc.

[0095] For a possible implementation, see Figure 7 , Figure 7 1 is another cross-sectional structural schematic diagram of the electrically heated glass 100 provided in an embodiment of the present application. The second busbar 30 may include a first sub-busbar 31 and a second sub-busbar 32. The first sub-busbar 31 and the second sub-busbar 32 are arranged at intervals in the width direction of the glass body 10. Among them, the polarity of the first sub-busbar 31 is the same as the polarity of the second sub-busbar 32. The first busbar 20 has an opposite polarity to the first sub-busbar 31, and the third busbar 40 has an opposite polarity to the second sub-busbar 32. Exemplarily, the polarity of the first busbar 20 may be positive, the polarity of the first sub-busbar 31 may be negative, the polarity of the second sub-busbar 32 may be negative, and the polarity of the third busbar 40 may be positive. Alternatively, the polarity of the first busbar 20 may be negative, the polarity of the first sub-busbar 31 may be positive, the polarity of the second sub-busbar 32 may be positive, and the polarity of the third busbar 40 may be negative.

[0096] Of course, in other embodiments, the polarity of the first sub-busbar 31 may be opposite to the polarity of the second sub-busbar 32. For example, the polarity of the first busbar 20 may be positive, the polarity of the first sub-busbar 31 may be negative, the polarity of the second sub-busbar 32 may be positive, and the polarity of the third busbar 40 may be negative. Alternatively, the polarity of the first busbar 20 may be negative, the polarity of the first sub-busbar 31 may be positive, the polarity of the second sub-busbar 32 may be negative, and the polarity of the third busbar 40 may be positive.

[0097] In this embodiment, one of the first sub-bus bar 31 and the second sub-bus bar 32 is electrically connected to the first heating structure 60 , and the other is electrically connected to the second heating structure 70 .

[0098] Exemplarily, one end of the first heating structure 60 is electrically connected to the first busbar 20, and the other end of the first heating structure 60 is electrically connected to the first sub-busbar 31. The first heating structure 60 bends and extends between the first busbar 20 and the first sub-busbar 31, and covers part of the first viewing area 110 and the second viewing area 120. One end of the second heating structure 70 is electrically connected to the second sub-busbar 32, and the other end of the second heating structure 70 is electrically connected to the third busbar 40. The second heating structure 70 bends and extends between the second sub-busbar 32 and the third busbar 40, and covers part of the third viewing area 130 and the fourth viewing area 140.

[0099] Please refer to Figure 3 and Figure 7In the embodiment of the present application, for the multiple first heating loops C1 formed by the multiple first heating structures 60, the first first heating loop C1 located in the innermost circle passes through the central area of ​​the first viewing area 110 and the central area of ​​the second viewing area 120. The length of the first first heating loop C1 located in the innermost circle is 2d11+d12. The area enclosed by the projection of the first heating loop C1 located in the outermost circle on the glass body 10 covers the second viewing area 120.

[0100] Wherein, d11 is the length of the first section 61 (or the third section 63) of the first heating structure 60 located in the innermost circle, and d12 is the length of the second section 62 of the first heating structure 60 located in the innermost circle. Similarly, the length of the nth first heating loop C1 located in the outermost circle is 2d n 1+d n 2. Among them, d n 1 is the length of the first section 61 (or the third section 63) of the nth first heating structure 60 located in the outermost circle, d n 2 is the length of the second section 62 of the nth first heating structure 60 located at the outermost circle.

[0101] For the second heating loop C2 formed by the second heating structure 70, the first second heating loop C2 located in the innermost circle passes through the central area of ​​the third viewing area 130 and the central area of ​​the fourth viewing area 140. The length of the second heating loop C2 located in the innermost circle is 2d14+d15. The area enclosed by the projection of the second heating loop C2 located in the outermost circle on the glass body 10 covers the fourth viewing area 140.

[0102] Wherein, d14 is the length of the fourth section 71 (or the sixth section 73) of the first second heating structure 70 located in the innermost circle, and d15 is the length of the fifth section 72 of the first second heating structure 70 located in the innermost circle. Similarly, the length of the nth second heating loop C2 located in the outermost circle is 2d n 4+d n 5. Among them, d n 4 is the length of the fourth section 71 (or the sixth section 73) of the nth second heating structure 70 located at the outermost circle, d n 5 is the length of the fifth section 72 of the nth second heating structure 70 located at the outermost circle.

[0103] It is understandable that in order to better facilitate the driver and passengers and reduce safety hazards, the area that needs to be heated by the electrically heated glass 100 needs to include at least the visible area, among which the first visual area 110 and the third visual area 130 are the most important, and the areas in the second visual area 120 and the fourth visual area 140 are less important. The importance of the visual area is the middle> the periphery, and the power distribution of the nested heating loops is consistent with this. The middle power is high, and defrosting or defrosting is given priority, and then it is extrapolated to the peripheral area. This design of the heating loop can effectively reduce losses and save energy.

[0104] In this embodiment, the length 2d11+d12 of the shortest first heating loop C1 located in the innermost circle is less than or equal to the distance d3 between the second busbar 30 and the edge busbar 50 or the distance S between the first edge 150 and the second edge 160. In addition, as the length of the first heating loop C1 is less than the distance d3 between the second busbar 30 and the edge busbar 50 or the distance S between the first edge 150 and the second edge 160, the heating performance is better, and the length 2d11+d12 of the first heating loop C1 in the outermost circle is optimal. n 1+d n 2 is less than or equal to the distance d3 between the second busbar 30 and the edge busbar 50 or the distance S between the first edge 150 and the second edge 160. In other words, the lengths of all first heating loops C1 may be less than or equal to the distance d3 between the second busbar 30 and the edge busbar 50 or the distance S between the first edge 150 and the second edge 160. The distance d3 between the second busbar 30 and the edge busbar 50 may be equal to the distance between the first busbar 20 and the edge busbar 50, or the distance between the third busbar 40 and the edge busbar 50.

[0105] And / or, the length 2d14+d15 of the shortest second heating loop C2 located in the innermost circle is less than or equal to the distance d3 between the second busbar 30 and the edge busbar 50 or the distance S between the first edge 150 and the second edge 160. In addition, the more the length of the second heating loop C2 is less than the distance d3 between the second busbar 30 and the edge busbar 50 or the distance S between the first edge 150 and the second edge 160, the better the heating performance is, and the optimal second heating loop C2 length 2d14+d15 of the outermost circle is satisfied. n 4+d n5 is less than or equal to the distance d3 between the second busbar 30 and the edge busbar 50 or the distance S between the first edge 150 and the second edge 160. In other words, the length of all the second heating loops C2 may be less than or equal to the distance d3 between the second busbar 30 and the edge busbar 50 or the distance S between the first edge 150 and the second edge 160. The distance d3 between the second busbar 30 and the edge busbar 50 may be equal to the distance between the first busbar 20 and the edge busbar 50, or the distance between the third busbar 40 and the edge busbar 50.

[0106] It is understandable that in order not to affect the field of view, at least the first field of view area 110 and the second field of view area 120 and / or the third field of view area 130 and the fourth field of view area 140 in the front windshield area 101 are not arranged with a horizontal heating structure. Therefore, the position of the horizontal heating structure must be guaranteed to be above the boundary line of the second field of view area 120 and the fourth field of view area 140, that is, the position of the second segment 62 of the first heating structure 60 and / or the fifth segment 72 of the second heating structure 70 must be guaranteed to be above the boundary line of the second field of view area 120 and / or the fourth field of view area 140. At this time, the spacing between the horizontal heating structures is more considered to be a process problem. For the first heating structure 60, the spacing distance between two adjacent second segments 62 can be 1mm to d2 mm. Among them, d2 is the length of the second segment 62 of a first heating structure 60 located in the innermost circle among the multiple first heating structures 60 along the width direction of the glass body 10, that is, d12 shown in the figure. For the second heating structure 70, the spacing distance between two adjacent fifth segments 72 can be 1mm to d5 mm. Among them, d5 is the length of the fifth section 72 of the innermost second heating structure 70 in the plurality of second heating structures 70 along the width direction of the glass body 10, i.e., d15 in the figure. In addition, the outermost heating loop at least covers the boundary line of the second viewing area 120 and / or the fourth viewing area 140. In this way, the glass in all viewing areas can be heated for defogging or defrosting to avoid safety hazards.

[0107] It is understandable that in the related art, the distance between the upper and lower busbars of the front windshield is relatively short, and the heating structure is designed according to a wavy line. In this way, the resistance of the heating structure can be increased by increasing its length, thereby reducing the power and thereby reducing the surface temperature of the electrically heated glass 100, thereby avoiding the generation of hot spots and burning out the heating structure.

[0108] However, in the embodiment of the present application, the electrically heated glass 100 is a panoramic windshield, and thus the distance between the upper and lower busbars of the electrically heated glass 100 is much greater than the distance between the upper and lower busbars of a conventional windshield. At this time, if the heating structure of the electrically heated glass 100 is arranged according to the wavy line, due to the long distance between the upper and lower busbars of the electrically heated glass 100 itself, it is easy to have insufficient power and poor defrosting and / or defrosting effects. Among them, the upper busbar of the electrically heated glass 100 is the busbar close to the upper edge of the electrically heated glass 100, that is, the edge busbar 50 close to the second edge 160 of the glass body 10. The lower busbar of the electrically heated glass 100 is the busbar close to the lower edge of the electrically heated glass 100, that is, the first busbar 20, the second busbar 30 or the third busbar 40 close to the first edge 150 of the glass body 10. Therefore, in the present technical solution, the heating circuit of the electrically heated glass 100 is classified and designed according to different distances:

[0109] For a possible implementation, see Figure 8 , Figure 8 It is another schematic cross-sectional structure diagram of the electrically heated glass 100 provided in the embodiment of the present application.

[0110] Among the multiple first heating loops C1, when the length of a first heating loop C1 is less than the preset length, the shape of the first heating structure 60 is designed to be a wavy line. When the length of a first heating loop C1 is greater than the preset length, the shape of the first heating structure 60 is designed to be a straight line for heating. When the length of a first heating loop C1 is equal to the preset length, the shape of the first heating structure 60 is designed to be a straight line or a wavy line.

[0111] Among them, the preset length is the length of the glass body 10 (i.e., the distance S between the first edge 150 and the second edge 160) × the first ratio × the second ratio, and the first ratio can be the ratio between the length of a conventional front windshield and the length of the glass body 10. The length of a conventional front windshield can be in the range of 300mm to 1200mm (including endpoint values ​​300mm and 1200mm). Further, the length of a conventional front windshield can be in the range of 800mm to 1000mm (including endpoint values ​​800mm and 1000mm). The length of the glass body 10 can be in the range of 1200mm to 2500mm (including endpoint values ​​1200mm and 2500mm). Further, the length of the glass body 10 can be in the range of 1500mm to 1800mm (including endpoint values ​​1500mm and 1800mm).

[0112] Exemplarily, the ratio of the first ratio may be in the range of 0.2-1 (including endpoint values ​​0.2 and 1). Further, the ratio of the first ratio may be in the range of 0.44-0.67 (including endpoint values ​​0.44 and 0.67). The ratio of the second ratio may be in the range of 1.35-1.4.

[0113] Among the plurality of second heating loops C2, when the length of a second heating loop C2 is less than the preset length described above, the shape of the second heating structure 70 is designed to be a wavy line. When the length of a second heating loop C2 is greater than the preset length described above, the shape of the second heating structure 70 is designed to be a straight line for heating. When the length of a second heating loop C2 is equal to the preset length described above, the shape of the second heating structure 70 is designed to be a straight line or a wavy line.

[0114] Referring to the heating design of conventional front windshields, in this design, when the total length of a first heating loop C1 and / or a second heating loop C2 is less than the preset length, the length of the first heating structure 60 and / or the second heating structure 70 is shorter and the heating power is larger. By designing the first heating structure 60 and / or the second heating structure 70 as a wavy line, the resistance of the heating loop can be increased, and the power can be reduced to reduce the glass surface temperature to avoid burning the heating structure. When the total length of a first heating loop C1 and / or the second heating loop C2 is greater than the preset length, the length of the first heating structure 60 and / or the second heating structure 70 is longer and the heating power is smaller. At this time, the first heating structure 60 and / or the second heating structure 70 can be designed as a straight line without considering the phenomenon of burning the heating structure due to excessive power. When the total length of a first heating loop C1 and / or the second heating loop C2 is equal to the preset length, the heating effect of designing the first heating structure 60 and / or the second heating structure 70 as a straight line or a wavy line is the same, and both are acceptable.

[0115] For a possible application scenario, see Figure 8 , the total length 2d11+d12 of the first first heating loop C1, the total length 2d21+d22 of the second first heating loop C1, and the total length 2d31+d32 of the third first heating loop C1 are all less than the preset length. At this time, the first heating structure 60 is designed as a wavy line for heating. The total length 2d41+d42 of the fourth first heating loop C1 is equal to the preset length. At this time, the first heating structure 60 is designed as a straight line for heating, or the first heating structure 60 can be designed as a wavy line for heating. The total length 2d51+d52 of the fifth first heating loop C1, the total length 2d61+d62 of the sixth first heating loop C1, and by inference, the total length 2d n 1+d n2 are both greater than the preset length, and at this time, the first heating structure 60 is designed to be a straight line for heating.

[0116] The total length 2d14+d15 of the first second heating loop C2, the total length 2d24+d25 of the second second heating loop C2, and the total length 2d34+d35 of the third second heating loop C2 are all less than the preset length. In this case, the second heating structure 70 is designed as a wavy line for heating. The total length 2d44+d45 of the fourth second heating loop C2 is equal to the preset length. In this case, the second heating structure 70 is designed as a straight line for heating, or the second heating structure 70 can be designed as a wavy line for heating. The total length 2d54+d55 of the fifth second heating loop C2, the total length 2d64+d65 of the sixth second heating loop C2, and by inference, the total length 2d n 4+d n 5 are all greater than the preset length, and at this time, the second heating structure 70 is designed to be a straight line for heating.

[0117] In summary, the electrically heated glass 100 can heat the glass without exposing the busbar and the heating structure by setting the shielding layer 14, and does not affect the appearance; the design of the lateral heating structure can meet the heating performance without affecting the driver's field of vision. In addition, by nesting the heating circuits in the field of vision, different heating powers are used for different areas of the field of vision, which can reduce losses and save energy.

[0118] The embodiments of the present application are described in detail above. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for a person skilled in the art, according to the idea of ​​the present application, there may be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An electrically heated glass, characterized in that: The electrically heated glass comprises: A glass body, the glass body comprising a front windshield area and a sunroof glass area connected to each other, the front windshield area having a visible area; a first busbar and a second busbar, wherein the first busbar and the second busbar are connected to the glass body and are located at an edge of the windshield area away from the sunroof glass area and are spaced apart from the visual area, the first busbar and the second busbar are spaced apart in a width direction of the glass body, and the polarity of the first busbar is opposite to that of the second busbar; a shielding layer, the shielding layer being connected to the outer edge of the glass body and spaced apart from the visible area, the shielding layer covering the first bus bar and the second bus bar; and A plurality of first heating structures are provided, wherein the plurality of first heating structures are connected to the glass body and are located in the windshield area, wherein one end of each of the first heating structures is electrically connected to the first bus bar, and the other end of each of the first heating structures is electrically connected to the second bus bar, and the plurality of first heating structures are sequentially spaced and nested between the first bus bar and the second bus bar, and at least one of the first heating structures crosses the visible area along the length direction of the glass body.

2. The electrically heated glass according to claim 1, characterized in that: The visible area includes a first viewing area and a second viewing area, the viewing range of the second viewing area includes the viewing range of the first viewing area, and each of the first heating structures includes a first section, a second section and a third section; One end of the first segment is connected to the first busbar, and the other end of the first segment is connected to one end of the second segment. The first segment extends along the length direction of the glass body, and at least one of the first segments spans the first viewing area and the second viewing area. The other end of the second segment is connected to one end of the third segment, the second segment extends along the width direction of the glass body, and in the length direction of the glass body, the second segment and the first generatrix are respectively located at two opposite sides of the second viewing area; The other end of the third segment is connected to the second bus bar, the third segment extends along the length direction of the glass body, and at least one of the third segments spans the first viewing area and the second viewing area.

3. The electrically heated glass according to claim 2, characterized in that: The spacing between two adjacent second sections is in the range of 1mm-d2mm, wherein d2 is the length of the second section of one of the first heating structures located in the innermost circle among the plurality of first heating structures along the width direction of the glass body.

4. The electrically heated glass according to any one of claims 1 to 3, characterized in that: The first busbar, the second busbar and any one of the first heating structures form a first heating loop; The multiple first heating circuits are arranged from the inside to the outside in the order from the central area of ​​the first viewing area and the second viewing area to the edge area of ​​the first viewing area and the second viewing area. Among the two adjacent first heating circuits, the length of the first heating circuit located in the inner circle is shorter than the length of the other first heating circuit located in the outer circle.

5. The electrically heated glass according to claim 4, characterized in that: Among the plurality of first heating circuits, an area enclosed by a projection of the first heating circuit located at the outermost circle on the glass body covers the second viewing area.

6. The electrically heated glass according to claim 4, characterized in that: The edge of the windshield area away from the sunroof glass area is the first edge of the glass body, and the edge of the sunroof glass area away from the windshield area is the second edge of the glass body, and the first edge and the second edge are arranged opposite to each other in the length direction of the glass body; The first busbar and the second busbar are close to the first edge; Among the multiple first heating circuits, the length of the first heating circuit located in the innermost circle is less than or equal to the distance between the first edge and the second edge, and / or, among the multiple first heating circuits, the length of the first heating circuit located in the outermost circle is less than or equal to the distance between the first edge and the second edge.

7. The electrically heated glass according to claim 4, characterized in that: When the length of the first heating loop is greater than a preset length, the shape of the first heating loop is a straight line, and when the length of the first heating loop is less than the preset length, the shape of the first heating loop is a wave; The preset length is the length of the glass body×the first ratio×the second ratio, the ratio of the first ratio is in the range of 0.2-1, and the ratio of the second ratio is in the range of 1.35-1.

4.

8. The electrically heated glass according to claim 7, characterized in that: The ratio of the first ratio is in the range of 0.44-0.

67.

9. The electrically heated glass according to any one of claims 1 to 3 and 5 to 8, characterized in that: The length of the glass body is in the range of 1200 mm to 2500 mm.

10. The electrically heated glass according to claim 9, characterized in that: The length of the glass body is in the range of 1500 mm to 1800 mm.

11. The electrically heated glass according to any one of claims 1 to 3, characterized in that: The electrically heated glass further comprises a third busbar, which is connected to the glass body and located at the edge of the windshield area and spaced apart from the visual area. The third busbar is spaced apart from the second busbar in the width direction of the glass body and is located on both sides of the second busbar with the first busbar respectively. The polarity of the third busbar is opposite to that of the second busbar. The electrically heated glass also includes a second heating structure, which is connected to the glass body and located in the windshield area, and is spaced apart from the first heating structure in the width direction of the glass body. One end of the second heating structure is electrically connected to the second bus bar, and the other end of the first heating structure is electrically connected to the third bus bar. The first heating structure bends and extends between the second bus bar and the third bus bar and crosses the visible area.

12. The electrically heated glass according to claim 11, characterized in that: The second bus bar includes a first sub-bus bar and a second sub-bus bar, the first sub-bus bar and the second sub-bus bar are arranged at intervals in the width direction of the glass body and have the same polarity, and one of the first sub-bus bar and the second sub-bus bar is electrically connected to the first heating structure, and the other is electrically connected to the second heating structure.

13. A vehicle, characterized in that: The vehicle comprises a body sheet metal and the electrically heated glass as claimed in any one of claims 1 to 12, wherein the electrically heated glass is connected to the body sheet metal.

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