Electrically heated glass and vehicle

Abstract

The application provides an electric heating glass and a vehicle. The electric heating glass comprises a glass body, a first bus bar, a second bus bar and a transparent heating film. The glass body comprises an outer sheet glass, an inner sheet glass and an intermediate layer which are arranged in layers. The outer sheet glass and the inner sheet glass are connected through the intermediate layer. The first bus bar is located between the outer sheet glass and the inner sheet glass. The first bus bar comprises a plurality of first sub-wires and a plurality of second sub-wires. The first sub-wires and the second sub-wires are located on different sides of the intermediate layer respectively. The first sub-wires and the second sub-wires are electrically connected. The second bus bar is located between the outer sheet glass and the inner sheet glass. The transparent heating film is located between the outer sheet glass and the inner sheet glass. The transparent heating film, the first sub-wires and the second bus bar are located on the same side. The transparent heating film is electrically connected with the first sub-wires and the second bus bar respectively. The technical scheme of the application can meet the defrosting and defogging performance without affecting the appearance and the driver's field of vision.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more particularly to an electrically heated glass and vehicle. Background Technology

[0002] In cold weather, car windows are prone to fogging and even frost formation, especially side windows. Fogging and frost can severely impair the driver's vision, posing a significant safety hazard. Therefore, electric heating elements are typically installed within the glass to defog or defrost it. However, current side window heating elements are visible and cannot achieve transparent heating of the glass, further obstructing the driver's view. Summary of the Invention

[0003] Embodiments of this application provide an electrically heated glass and vehicle that can satisfy defogging and defrosting performance without affecting the appearance and driver's visibility.

[0004] In a first aspect, this application provides an electrically heated glass, the electrically heated glass comprising:

[0005] A glass body, comprising an outer glass sheet, an inner glass sheet, and an intermediate layer stacked together, wherein the outer glass sheet and the inner glass sheet are connected by the intermediate layer;

[0006] A first busbar is located between the outer glass and the inner glass. The first busbar includes a plurality of first sub-busbars and a plurality of second sub-busbars. The first sub-busbars and the second sub-busbars are located on different sides of the intermediate layer, and the first sub-busbars and the second sub-busbars are electrically connected.

[0007] A second busbar, located between the outer glass pane and the inner glass pane; and

[0008] A transparent heating film is located between the outer glass and the inner glass. The transparent heating film, the first sub-wire, and the second busbar are located on the same side. The transparent heating film is electrically connected to the first sub-wire and the second busbar, respectively.

[0009] It is understood that in the embodiments of this application, the power supply can make the heating current flow through the transparent heating film through the first bus and the second bus. The transparent heating film heats up under the action of the heating current and generates heat, thereby enabling the electrically heated window glass to have functions such as defrosting, defogging, and de-icing.

[0010] Since electrically heated glass uses a transparent heating film for heating, employing this coating structure with excellent transparency as the heating element allows for full-surface transparent heating, making the heating element invisible from the glass's appearance. This ensures that the defrosting and defogging performance of the electrically heated glass is met without affecting its appearance or the driver's visibility. Furthermore, for a transparent heating film with uniform thin-film resistance, the current density within its surface is relatively uniform. Therefore, the magnitude, direction, and power density of the current within the transparent heating film surface exhibit good consistency, resulting in a more ideal and uniform heating effect.

[0011] In one possible implementation, the first busbar further includes a connecting portion, through which the first sub-bus and the second sub-bus are electrically connected, and the connecting portion passes through the intermediate layer.

[0012] In one possible implementation, the first sub-line, the second sub-line, and the connecting portion are integrally formed.

[0013] In one possible implementation, the first busbar and the second busbar are located on the same side edge of the electrically heated glass, with the second busbar being closer to the edge of the electrically heated glass than the first busbar.

[0014] In one possible implementation, the transparent heating film is provided with a plurality of first isolation lines, which divide the transparent heating film into a plurality of heating circuits arranged in parallel.

[0015] In one possible implementation, the heating circuit includes a first region, a second region, and a third region, with the first region and the second region separated by a second isolation line. The third region is located at the end of the first region and the second region away from the first busbar and the second busbar, and is electrically connected to the first region and the second region, respectively.

[0016] In one possible implementation, the second busbar is in contact with both the first region and the second region simultaneously, the first sub-busbar is in contact with either the first region or the second region, and the first sub-busbar is closer to the third region relative to the second busbar.

[0017] In one possible implementation, a plurality of the heating circuits are arranged sequentially along the length of the electrically heated glass, and the heating circuits extend and bend between the first sub-line and the second busbar.

[0018] In one possible implementation, along the length of the electrically heated glass, the size of the first sub-line is less than or equal to the size of the first or second region it contacts.

[0019] In one possible implementation, at least a portion of the first sub-line is located within the intermediate layer, and / or at least a portion of the second sub-line is located within the intermediate layer.

[0020] In one possible implementation, the electrically heated glass includes an upper edge and a lower edge, the upper edge and the lower edge being opposite to and spaced apart along the width direction of the electrically heated glass, and the lower edge being closer to the bottom of the vehicle relative to the upper edge;

[0021] Both the first busbar and the second busbar are located at the lower edge.

[0022] In one possible implementation, the electrically heated glass is a side window glass.

[0023] Secondly, this application also provides a vehicle, the vehicle including a body sheet and electrically heated glass as described above, the electrically heated glass being mounted on the body sheet. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application;

[0025] Figure 2 This is a perspective structural diagram of an electrically heated glass provided in an embodiment of this application;

[0026] Figure 3 yes Figure 2 A schematic diagram showing the position of a film layer in electrically heated glass;

[0027] Figure 4 yes Figure 2 A schematic diagram showing another film layer location in the electrically heated glass;

[0028] Figure 5 It is along Figure 2 The diagram shows a cross-sectional view of a portion of the structure of an electrically heated glass obtained by cutting along section line AA.

[0029] Figure label:

[0030] Vehicle 200, body sheet metal 210, electrically heated glass 100, upper edge 110, lower edge 120, glass body 10, first busbar 30, second busbar 20, transparent heating film 40, outer glass 11, inner glass 12, first surface 111, second surface 112, third surface 121, fourth surface 122, intermediate layer 13, heating circuit 43, first isolation line 411, second isolation line 412, first area 431, second area 432, third area 433, first sub-line 31, second sub-line 32, connecting part 33. Detailed Implementation

[0031] For ease of understanding, the terminology used in the embodiments of this application will be explained first.

[0032] And / or: This is simply a way of describing the relationship between related objects. It indicates that there can be three kinds of relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0033] Multiple: refers to two or more.

[0034] Connection: should be interpreted broadly. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through an intermediary.

[0035] The technical solutions in the embodiments of this application will be clearly described below with reference to the accompanying drawings.

[0036] Embodiments of this application provide an electrically heated glass and a vehicle.

[0037] Please see Figure 1 , Figure 1 This is a schematic diagram of a vehicle structure provided in an embodiment of this application.

[0038] Vehicle 200 may include body sheet metal 210 and electrically heated glass 100. The electrically heated glass 100 is mounted on body sheet metal 210. The electrically heated glass 100 may be one or more of the following: windshield, rear windshield, sunroof, side window, and corner window of vehicle 200.

[0039] It should be noted that, Figure 1 The purpose of this illustration is solely to depict the connection relationship between the vehicle body sheet metal 210 and the electrically heated glass 100, and is not to specifically limit the connection positions, specific structures, or quantities of each component. In other embodiments of this application, the vehicle 200 may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0040] The following explanation will take the electrically heated glass 100 as an example of the side window glass of vehicle 200, but it should be understood that it is not limited to this.

[0041] Understandably, the left and right rearview mirrors on vehicle 200 allow drivers to observe road conditions, the positions and driving status of other vehicles 200, and so on, to make accurate judgments when changing lanes, turning, or reversing, thus avoiding collisions and other dangerous situations. In other words, drivers can expand their field of vision by observing the left and right rearview mirrors to ensure driving safety. However, drivers need to observe the left and right rearview mirrors through the side windows located on the sides of the vehicle. This means that in cold weather, if the side windows fog up, frost, or condensate, it will severely affect the driver's view of the left and right rearview mirrors, posing a safety hazard.

[0042] To address the aforementioned issues, side window glass needs to possess sufficient heating performance for defrosting and defogging, ensuring clear visibility even in adverse weather conditions and guaranteeing the driver's visibility in cold weather. However, as described in the background section, current side window heating elements are visible and cannot achieve transparent heating of the glass, which can easily impair the driver's visibility.

[0043] In view of this, embodiments of this application provide an electrically heated glass 100 that can satisfy defogging and defrosting performance without affecting the appearance and driver's visibility, thereby improving the safety performance of the vehicle 200 during use.

[0044] Please see Figure 2 , Figure 2 This is a perspective structural schematic diagram of an electrically heated glass 100 provided in an embodiment of this application. Figure 2 In this illustration, the shape of the electrically heated glass 100 is for convenience only and does not constitute a specific limitation on the structure of the electrically heated glass 100. The electrically heated glass 100 can be any regular or irregular shape. Furthermore, the direction of the dashed arrows in the electrically heated glass 100 indicates the direction of current flow. In addition, for ease of illustration, the second sub-line 32 of the second busbar 20 in the electrically heated glass 100 is indicated by a shaded area.

[0045] For ease of description, the length direction of the electrically heated glass 100 is defined as the X direction, the width direction as the Y direction, and the thickness direction as the Z direction. The X, Y, and Z directions are all perpendicular to each other.

[0046] The electrically heated glass 100 may include an upper edge 110 and a lower edge 120. Both the upper edge 110 and the lower edge 120 may extend along the length direction (X direction in the diagram) of the electrically heated glass 100 and be positioned opposite each other and spaced apart along the width direction (Y direction in the diagram). The lower edge 120 may be located closer to the bottom of the vehicle 200 relative to the upper edge 110. Here, "extending along the length direction of the electrically heated glass 100" means that the upper edge 110 may extend in a straight line or a curve along the length direction of the electrically heated glass 100. "Extending along the length direction of the electrically heated glass 100" means that the lower edge 120 may extend in a straight line or a curve along the length direction of the electrically heated glass 100. The meaning of "extending along each direction" as described below is the same and will not be repeated.

[0047] The electrically heated glass 100 may include a glass body 10, a first busbar 30, a second busbar 20, and a transparent heating film 40. The first busbar 30, the second busbar 20, and the transparent heating film 40 are all connected to the glass body 10. The first busbar 30 and the second busbar 20 may both be electrically connected to the transparent heating film 40, allowing current to flow through them, thereby enabling the transparent heating film 40 to heat the glass body 10 and achieve the defrosting and defogging functions of the electrically heated glass 100. The polarity of the second busbar 20 may be opposite to that of the first busbar 30. That is, the polarity of the first busbar 30 may be either positive or negative, and the polarity of the second busbar 20 may be either positive or negative.

[0048] Please refer to the following: Figure 2 , Figure 3 and Figure 4 , Figure 3 yes Figure 2 The diagram shows a structural schematic of the position of a film layer in the electrically heated glass 100. Figure 4 yes Figure 2 A schematic diagram of another film layer location of the electrically heated glass 100 shown.

[0049] The glass body 10 may include an outer glass pane 11 and an inner glass pane 12. The inner glass pane 12 and the outer glass pane 11 are stacked in the thickness direction (Z direction shown in the figure) of the glass body 10. The outer glass pane 11 may be located near the exterior of the vehicle 200, while the inner glass pane 12 may be located near the interior of the vehicle 200.

[0050] The outer glass 11 may include a first surface 111 and a second surface 112. The second surface 112 and the first surface 111 are disposed opposite each other in the thickness direction (Z direction in the figure) of the outer glass 11. The first surface 111 is the surface of the outer glass 11 facing the outside of the vehicle 200, that is, the outer surface of the glass body 10. The second surface 112 is the surface of the outer glass 11 facing the inside of the vehicle 200.

[0051] For example, the outer glass 11 can be bent and formed at a high temperature of at least 500°C. The thickness of the outer glass 11 can be 1.6mm-5.0mm (inclusive of the endpoint values ​​of 1.6mm and 5.0mm). For example, the thickness of the outer glass 11 can 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 11 can be 1.8mm or 2.1mm. The outer glass 11 can be clear glass, ordinary green glass, solar green glass, gray glass, etc. When the electrically heated glass 100 is the front door side window glass before the B-pillar of the vehicle 200, in order to ensure that the driver can see the rearview mirror outside the front door glass through the front door glass. The total solar transmittance (TL) of electrically heated glass 100 for light with wavelengths in the visible light band (such as 380nm~780nm) will be greater than 70%. At this time, the outer glass 11 can be made of clear glass, ordinary green glass, or solar green glass.

[0052] The inner glass pane 12 may include a third surface 121 and a fourth surface 122. The fourth surface 122 and the third surface 121 are disposed opposite to each other in the thickness direction (Z direction in the figure) of the inner glass pane 12. The third surface 121 is the surface of the inner glass pane 12 facing the outside of the vehicle 200. The fourth surface 122 is the surface of the inner glass pane 12 facing the inside of the vehicle 200. The third surface 121 may be disposed opposite to the second surface 112 of the outer glass pane 11.

[0053] For example, the inner glass 12 can be bent and formed at a high temperature of at least 500°C. The thickness of the inner glass 12 can be 1.6mm-5.0mm (including the endpoint values ​​of 1.6mm and 5.0mm). For example, the thickness of the inner glass 12 can 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 inner glass 12 can be 1.8mm or 2.1mm. The inner glass 12 can be clear glass, ordinary green glass, solar green glass, gray glass, etc. When the electrically heated glass 100 is the front door side window glass before the B-pillar of the vehicle 200, in order to ensure that the driver can see the rearview mirror outside the front door glass through the front door glass. The total solar transmittance (TL) of electrically heated glass 100 for light with wavelengths in the visible light band (such as 380nm~780nm) will be greater than 70%. At this time, the inner glass 12 can be made of clear glass, ordinary green glass, or solar green glass.

[0054] In embodiments of this application, the glass body 10 may further include an intermediate layer 13. In the thickness direction (Z direction in the figure), the inner glass 12, the intermediate layer 13, and the outer glass 11 are sequentially stacked. The outer glass 11 and the inner glass 12 are connected by the intermediate layer 13. The intermediate layer 13 connects the inner glass 12 and the outer glass 11. Specifically, the intermediate layer 13 may be connected between the second surface 112 of the outer glass 11 and the third surface 121 of the inner glass 12. That is, the intermediate layer 13 is sandwiched between the second surface 112 of the outer glass 11 and the third surface 121 of the inner glass 12, and is used to bond and fix the outer glass 11 and the inner glass 12 together.

[0055] For example, the interlayer 13 can be a thermoplastic interlayer. The material of the interlayer 13 can be, but is not limited to, polycarbonate (PC), polyvinyl chloride (PVC), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyacrylate (PA), polymethyl methacrylate (PMMA), polyurethane (PUR), ionomer film (SGP), etc. Further, the interlayer 13 can also comprise at least two layers. One of the two layers has a higher plasticizer content, thus providing sound insulation. And / or, functional heat-insulating particles (such as indium tin oxide, ultraviolet blocking agents, infrared blocking agents, etc.) can be added to the interlayer 13 using physical vapor deposition or other sputtering deposition techniques to give it sun protection and heat insulation functions.

[0056] In embodiments of this application, the transparent heating film 40 may be located between the outer glass 11 and the inner glass 12. Specifically, as... Figure 3As shown, the transparent heating film 40 can be attached to the second surface 112 of the outer glass 11. The outer glass 11 can be located between the second surface 112 of the outer glass 11 and the intermediate layer 13. Alternatively, as... Figure 4 As shown, the transparent heating film 40 can be attached to the third surface 121 of the inner glass 12. The transparent heating film 40 can be located between the third surface 121 of the inner glass 12 and the intermediate layer 13.

[0057] For example, the transparent heating film 40 can be directly deposited onto the second surface 112 of the outer glass 11 or the third surface 121 of the inner glass 12 using chemical vapor deposition (CVD) or physical vapor deposition (PVD), such as by magnetron sputtering. Furthermore, the transparent heating film 40 can withstand high-temperature heat treatment, such as bending or tempering. Specifically, the transparent heating film 40 may include a metal layer, a metal alloy layer, or a metal oxide layer. The metal layer can be gold (Au), silver (Ag), copper (Cu), aluminum (Al), or molybdenum (Mo). The metal alloy layer can be a silver alloy. The metal oxide layer can be indium tin oxide, fluorine-doped tin dioxide, aluminum-doped tin dioxide, gallium-doped tin dioxide, boron-doped tin dioxide, tin-zinc oxide, or antimony-doped tin oxide, etc. For example, when the transparent heating film 40 includes a silver layer or a silver alloy layer, the silver layer or silver alloy layer is located between at least two dielectric layers. The dielectric layer contains at least one of the following: zinc oxide, tin oxide, indium oxide, titanium oxide, silicon oxide, aluminum oxide, silicon nitride, silicon carbide, aluminum nitride, or titanium metal layer. When a transparent heating film 40 is connected to the second surface 112 of the outer glass 11 or the third surface 121 of the inner glass 12, the outer glass 11 is preferably made of clear glass or ultra-clear glass because this film layer has a reflective effect on solar energy, which can reduce the total solar energy transmittance and play a role in heat insulation. By adding a busbar and power input to this film layer, the film layer becomes conductive and can play a role in defrosting and defogging.

[0058] Please see Figure 2The transparent heating film 40 may be provided with multiple first isolation lines 411. These multiple first isolation lines 411 can divide the transparent heating film 40 into multiple parallel heating circuits 43. The two ends of each first isolation line 411 are connected to the side of the transparent heating film 40 facing the lower edge 120 of the electrically heated glass 100 and the side of the transparent heating film 40 facing the upper edge 110 of the electrically heated glass 100, respectively, to enclose the heating circuit 43. For example, the first isolation line 411 may extend along the front or rear edge of the electrically heated glass 100. The front edge of the electrically heated glass 100 is the edge connecting the upper edge 110 and the lower edge 120, and is close to the front of the vehicle. The rear edge of the electrically heated glass 100 is the edge connecting the upper edge 110 and the lower edge 120, and is close to the rear of the vehicle. By setting the extension path of each heating circuit 43, multiple current paths (such as...) can be selectively formed between the first busbar 30 and the second busbar 20. Figure 2 (As shown by the dashed arrow in the image), this allows for uniform and rapid heating on irregularly shaped side window glass.

[0059] The first isolation line 411 can be formed by removing the film using methods such as laser or grinding wheel, or by covering a local area with a cover plate during the coating process. The structures of multiple first isolation lines 411 can be similar, identical, or different. Multiple first isolation lines 411 can be arranged sequentially along the length of the electrically heated glass 100. The structures of multiple heating circuits 43 can be similar, identical, or different. Multiple heating circuits 43 can be arranged sequentially along the length of the electrically heated glass 100 (X direction in the figure). Among the multiple heating circuits 43, the area of ​​the heating circuit 43 along the length of the electrically heated glass 100 can increase, decrease, or remain unchanged.

[0060] For example, the number of first isolation lines 411 can be eight. The eight first isolation lines 411 can divide the transparent heating film 40 into nine heating circuits 43 arranged in parallel. The nine heating circuits 43 can be arranged sequentially along the length of the electrically heated glass 100.

[0061] It is understandable that by using multiple first isolation lines 411 to remove part of the area inside the transparent heating film 40, multiple heating circuits 43 with multiple parallel currents can be easily and quickly formed inside the transparent heating film 40, realizing multi-zone heating of the electrically heated glass 100, which is beneficial to improving the local resistivity inside the transparent heating film 40, and realizing the function of local rapid heating on the basis of overall uniform heating.

[0062] In addition, in some embodiments, each heating circuit 43 can also be controlled by additional electrical components to allow a current to flow independently within it, so as to independently realize the individual heating function of each heating circuit 43. This allows multiple heating circuits 43 to cooperate to realize the whole-area heating function of the transparent heating film 40, ensuring the heating area and heating uniformity of the electrically heated glass 100.

[0063] In the embodiments of this application, the transparent heating film 40 may be provided with a plurality of second isolation lines 412. The second isolation lines 412 may be located within the heating circuit 43 and spaced apart from the first isolation lines 411. One end of the second isolation line 412 is connected to the side of the transparent heating film 40 facing the lower edge 120 of the electrically heated glass 100, and the other end of the second isolation line 412 has a gap with the side of the transparent heating film 40 facing the upper edge 110 of the electrically heated glass 100.

[0064] The heating circuit 43 may include a first region 431, a second region 432, and a third region 433. The first region 431 and the second region 432 are separated by a second isolation line 412. The second isolation line 412 divides the heating circuit 43 into the first region 431, the second region 432, and the third region 433. The first region 431 and the second region 432 may be arranged in parallel and both extend along the width direction of the electrically heated glass 100. The third region 433 may be located at the end of the first region 431 and the second region 432 away from the first busbar 30 and the second busbar 20. The third region 433 may extend along the length direction of the electrically heated glass 100. The third region 433 may connect between the first region 431 and the second region 432 and communicate with the first region 431 and the second region 432. The third region 433 may be electrically connected to the first region 431 and the second region 432 respectively. The first region 431, the third region 433, and the second region 432 are electrically connected sequentially to form the heating circuit 43 described above. For example, the second isolation line 412 may be arranged parallel to the first isolation line 411.

[0065] The second isolation line 412 can be formed by removing the film using methods such as laser or grinding wheel, or by covering a local area with a cover plate during the coating process. The length, width, and other characteristic parameters of the second isolation line 412 can be selected according to the actual application scenario of the electrically heated glass 100, and there are no restrictions on them.

[0066] Understandably, by using the first isolation line 411, a closed and independent heating circuit 43 can be separated within the transparent heating film 40, so that a single current flowing into the heating circuit 43 can flow throughout the entire area of ​​the heating circuit 43. Furthermore, by using the second isolation line 412, the heating circuit 43 can be divided into three regions: a first region 431, a second region 432, and a third region 433. This allows for the planning of a specific current flow path within the heating circuit 43, similar to a "U" shape, enabling the current to flow according to the planned path and thus forming a "U"-shaped heating circuit 43, fully ensuring the heating area within the heating circuit 43.

[0067] In other embodiments, the heating circuit 43 may also be in other shapes such as circular, teardrop, arc, star, triangle, polygon, spiral, or square, without limitation.

[0068] Please see Figure 2 In the embodiments of this application, the second busbar 20 can be located between the outer glass 11 and the inner glass 12. The second busbar 20 can be located on the same side as the transparent heating film 40 and electrically connected to the transparent heating film 40. That is, the second busbar 20 can be disposed in the same layer as the transparent heating film 40. Here, "disposed in the same layer" means that the two components can be on the same plane or the same layer. The description of "disposed in the same layer" in the following text can be understood similarly and will not be repeated.

[0069] For example, the second busbar 20 may extend along the length of the electrically heated glass 100. The polarity of the second busbar 20 may be negative. The material of the second busbar 20 may be metal foil, conductive silver paste, etc.

[0070] Specifically, the second busbar 20 may be located between the second surface 112 of the outer glass 11 and the intermediate layer 13. Alternatively, the second busbar 20 may be located between the third surface 121 of the inner glass 12 and the intermediate layer 13.

[0071] Furthermore, the second busbar 20 can be connected to the transparent heating film 40. For example, the second busbar 20 can be disposed on the transparent heating film 40 by means of printing, spraying, sputtering or bonding.

[0072] Please see Figure 2The first busbar 30 can be located between the outer glass 11 and the inner glass 12, and spaced apart from the second busbar 20. A portion of the first busbar 30, the transparent heating film 40, and the second busbar 20 can be located on the same side, while another portion of the first busbar 30 can be located on different sides from both the transparent heating film 40 and the second busbar 20. That is, a portion of the first busbar 30 can be disposed in the same layer as both the transparent heating film 40 and the second busbar 20, while another portion can be disposed in different layers from both the transparent heating film 40 and the second busbar 20. The first busbar 30 disposed on the same side as the transparent heating film 40 and the second busbar 20 can be electrically connected to the transparent heating film 40. The first busbar 30 disposed on the opposite side of the transparent heating film 40 and the second busbar 20 can be electrically isolated from the transparent heating film 40. Here, electrical isolation refers to cutting off the direct electrical connection between two components or devices through electrical insulation or other means, thereby preventing the direct transmission of current, voltage, or signals between them. The description of "electrical isolation" in the following text can be understood similarly and will not be repeated.

[0073] For example, the first busbar 30 may extend along the length direction of the electrically heated glass 100 and be spaced apart from the second busbar 20 along the width direction of the electrically heated glass 100. Optionally, the first busbar 30 may be arranged parallel to the second busbar 20. The first busbar 30 may be located away from the lower edge 120 of the electrically heated glass 100 relative to the second busbar 20. The polarity of the first busbar 30 may be positive. The material of the first busbar 30 may be metal foil, conductive silver paste, etc.

[0074] In some other embodiments, the second busbar 20 and the first busbar 30 may both extend along the width direction of the electrically heated glass 100 and be spaced apart along the length direction of the electrically heated glass 100, without limitation.

[0075] Please refer to the following: Figure 2 and Figure 5 , Figure 5 It is along Figure 2 The diagram shows a cross-sectional view of a portion of the structure of the electrically heated glass 100 obtained by cutting along section line AA.

[0076] In embodiments of this application, the first busbar 30 may include a plurality of first sub-buses 31 and a plurality of second sub-buses 32. The plurality of first sub-buses 31 and the plurality of second sub-buses 32 may be alternately arranged in the first busbar 30. A second sub-bus 32 is provided between two adjacent first sub-buses 31. That is, along the extension direction of the first busbar 30, the first busbar 30 may form a layout structure of "first sub-bus 31-second sub-bus 32-first sub-bus 31-...-first sub-bus 31". The structures of the plurality of first sub-buses 31 may be similar, identical, or different. The structures of the plurality of second sub-buses 32 may be similar, identical, or different.

[0077] The first sub-wire 31 and the second sub-wire 32 can be located on different sides of the intermediate layer 13. The first sub-wire 31 and the second sub-wire 32 are electrically connected. The first sub-wire 31, the second busbar 20, and the transparent heating film 40 can all be located on the same side. The first sub-wire 31 can be electrically connected to the heating circuit 43. Specifically, the first sub-wire 31 can contact the first region 431 or the second region 432 of the heating circuit 43. The second sub-wire 32 can be located on different sides from the second busbar 20 and the transparent heating film 40. The second sub-wire 32 can be electrically isolated from the heating circuit 43. Further, the first sub-wire 31 can be connected to the transparent heating film 40. For example, the first sub-wire 31 can be disposed on the transparent heating film 40 by means of printing, spraying, sputtering, or bonding.

[0078] For example, the first sub-line 31, the second busbar 20, and the transparent heating film 40 are all located between the outer glass 11 and the intermediate layer 13, that is, between the second surface 112 of the outer glass 11 and the intermediate layer 13. The second sub-line 32 is located between the inner glass 12 and the intermediate layer 13, that is, between the third surface 121 of the inner glass 12 and the intermediate layer 13.

[0079] Alternatively, the first sub-line 31, the second busbar 20, and the transparent heating film 40 are all located between the inner glass 12 and the intermediate layer 13, that is, between the third surface 121 of the inner glass 12 and the intermediate layer 13. The second sub-line 32 is located between the outer glass 11 and the intermediate layer 13, that is, between the second surface 112 of the outer glass 11 and the intermediate layer 13.

[0080] Please continue reading. Figure 2 and Figure 5 At least a portion of the first sub-wire 31 can be located within the intermediate layer 13, and / or at least a portion of the second sub-wire 32 can be located within the intermediate layer 13. Thus, at least a portion of the first busbar 30 can be embedded within the intermediate layer 13, achieving a "threading" structure for the first busbar 30 on the intermediate layer 13. This not only improves the connection strength and reliability between the first busbar 30 and the intermediate layer 13 but also facilitates the thinning of the electrically heated glass 100. Furthermore, the first busbar 30 does not require segmentation, simplifying the design and process, and facilitating industrial mass production.

[0081] The first busbar 30 may further include a connecting portion 33. The first sub-bus 31 and the second sub-bus 32 can be electrically connected through the connecting portion 33. The connecting portion 33 can pass through the intermediate layer 13. Specifically, the connecting portion 33 can be connected between the first sub-bus 31 and the second sub-bus 32. The connecting portion 33 can be arranged at an angle to both the first sub-bus 31 and the second sub-bus 32. Exemplarily, the connecting portion 33 can be embedded in the intermediate layer 13 and bent to connect between the first sub-bus 31 and the second sub-bus 32.

[0082] The number of connecting parts 33 can be multiple. Each connecting part 33 connects to an adjacent first sub-line 31 and a second sub-line 32. Specifically, any connecting part 33 can be embedded in the intermediate layer 13 and bent to connect to an adjacent first sub-line 31 and a second sub-line 32. That is, along the extension direction of the first busbar 30, the first busbar 30 can form a layout structure of "first sub-line 31 - connecting part 33 - second sub-line 32 - connecting part 33 - first sub-line 31 - ... - first sub-line 31".

[0083] Therefore, the first busbar 30 can be structurally arranged in the intermediate layer 13 while maintaining its integrity as a complete busbar. Since the first busbar 30 is not a disconnected structure, it can balance current continuity with ease of processing and manufacturing.

[0084] Furthermore, in the first busbar 30, the first sub-busbar 31, the second sub-busbar 32, and the connecting portion 33 can be integrally formed. The integrally formed first busbar 30 is simpler to process and manufacture, which helps to save processing costs and improve processing efficiency. For example, the first sub-busbar 31, the second sub-busbar 32, and the connecting portion 33 can be integrally formed.

[0085] In the embodiments of this application, one end of any heating circuit 43 is electrically connected to the first sub-line 31 of an adjacent first sub-line 31 and a second sub-line 32, and electrically isolated from the second sub-line 32. The other end of any heating circuit 43 is electrically connected to the first busbar 30. That is, any heating circuit 43 can bend and extend between a first sub-line 31 and a second busbar 20 of the first busbar 30. With this configuration, the heating circuit 43 can achieve a longer extension path within a limited layout space, fully ensuring the uniformity and consistency of heating at various locations within the heating circuit 43.

[0086] At this point, since the second busbar 20 and any one of the first sub-wires 31 of the first busbar 30 and the transparent heating film 40 are located on the same side, current can flow from the first sub-wire 31 of the first busbar 30 and reach the second busbar 20 in any heating circuit 43. Because the second sub-wire 32 of the first busbar 30 is on a different side from the second busbar 20 and there is a certain distance difference between them, the second sub-wire 32 of the first busbar 30 is not connected to the transparent heating film 40, thus achieving electrical isolation between the second sub-wire 32 of the first busbar 30 and the transparent heating film 40. The advantage of this scheme is that both the second busbar 20 and the first busbar 30 are complete busbars, not disconnected structures, thus ensuring the continuity of current in both the second busbar 20 and the first busbar 30, as well as the ease of processing and manufacturing of the second busbar 20 and the first busbar 30.

[0087] Within the same heating circuit 43, the first sub-line 31 of the first busbar 30 contacts either the first region 431 or the second region 432. The second busbar 20 can simultaneously contact both the first region 431 and the second region 432. The first sub-line 31 is closer to the third region 433 relative to the second busbar 20. Along the length of the electrically heated glass 100, the size of the first sub-line 31 is smaller than or equal to the size of the first region 431 or the second region 432 it contacts. Thus, for any one first sub-line 31, it can be located within the area of ​​the first region 431 or the second region 432 of a heating circuit 43, avoiding contact with an adjacent heating circuit 43 outside the area of ​​this heating circuit 43, thus preventing localized hot spots.

[0088] It is understood that in the embodiments of this application, the power supply can make the heating current flow through the transparent heating film 40 through the first bus 30 and the second bus 20. The transparent heating film 40 heats up under the action of the heating current and generates heat, thereby enabling the electrically heated window glass to have functions such as defrosting, defogging, and de-icing.

[0089] Since the electrically heated glass 100 uses a transparent heating film 40 for heating, using this coating structure with excellent transparency as the heating element in the electrically heated glass 100 allows for full-surface transparent heating, making the heating element invisible on the surface of the electrically heated glass 100. This ensures that the defrosting and defogging performance of the electrically heated glass 100 is met without affecting its appearance or the driver's visibility. Furthermore, for the transparent heating film 40 with uniform thin-film resistance, its in-plane current density is relatively uniform. Therefore, the magnitude, direction, and power density of the current in the transparent heating film 40 are all highly consistent, resulting in a more ideal and uniform heating effect.

[0090] Furthermore, the power and resistance of the heating circuit satisfy the formulas: 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 (i.e., the heating circuit), and S is the cross-sectional area of ​​the conductor. According to these formulas, the shorter the length L of the heating circuit, the smaller the resistance R. Therefore, given a constant input voltage U, a smaller resistance R results in a larger power P, and thus better heating performance of the heating circuit.

[0091] In view of this, in the embodiments of this application, by forming multiple parallel heating circuits in the electrically heated glass 100, the excessive length of a single heating circuit due to winding can be avoided, making the length L of a single heating circuit shorter and the resistance R smaller, thereby improving the heating performance of a single heating circuit, and thus improving the overall heating performance of the multiple parallel heating circuits formed by the transparent heating film 40.

[0092] In the embodiments of this application, the first busbar 30 and the second busbar 20 may both be located on the same side edge of the electrically heated glass 100, with the second busbar 20 being closer to the edge of the electrically heated glass 100 than the first busbar 30. Specifically, the first busbar 30 and the second busbar 20 may both be located at the lower edge 120 of the electrically heated glass 100 and extend along the lower edge 120 of the electrically heated glass 100. In other embodiments, the first busbar 30 and the second busbar 20 may also extend along other edges of the electrically heated glass 100, without limitation.

[0093] Understandably, the electrically heated glass 100 is preferably an openable and closable side window. The electrically heated glass 100 can be opened by lowering it into the doorway and closed by raising it to close the doorway opening. During the raising and lowering of the electrically heated glass 100, its upper edge 110 is usually visible, while its lower edge 120 is usually obscured by the door frame. Therefore, arranging the second busbar 20 and the first busbar 30 at the lower edge 120 of the electrically heated glass 100 achieves concealment of their layout, thus preventing them from being visible and improving the appearance of the electrically heated glass 100, thereby enhancing the driver's user experience.

[0094] Optionally, multiple heating circuits 43 can cooperate to form a first conductive area (not shown) and a second conductive area (not shown). The second conductive area can be arranged around the periphery of the first conductive area. The first conductive area can be the area in the multiple heating circuits 43 used to heat the area through which the exterior rearview mirror can be viewed. The second conductive area can be the area in the multiple heating circuits 43 used to heat areas other than the area through which the exterior rearview mirror can be viewed. The heating power density of the first conductive area can be greater than the heating power density of the second conductive area, thereby enabling rapid defrosting and defogging of the area in the electrically heated glass 100 through which the exterior rearview mirror can be viewed, facilitating the driver's view of the rearview mirror through this area.

[0095] Optionally, using existing heating methods, after heating the electrically heated glass 100 at room temperature for 20 minutes, the temperature of the entire glass surface of the electrically heated glass 100 can be approximately 32℃~33℃ (including the endpoint values ​​of 32℃ and 33℃). However, using the heating method of this application, under the same conditions, after heating at room temperature for 20 minutes, the temperature of the entire glass surface of the electrically heated glass 100 can be approximately 35℃~75℃ (including the endpoint values ​​of 35℃ and 75℃), the temperature of the first conductive area can be approximately 50℃~75℃ (including the endpoint values ​​of 50℃ and 75℃), and the temperature of the second conductive area can be approximately 35℃~50℃ (including the endpoint values ​​of 35℃ and 50℃). Therefore, it can be seen that by adopting the technical solution of this application, the heating performance of the electrically heated glass 100 is significantly improved.

[0096] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An electrically heated glass, characterized in that, The electrically heated glass comprises: A glass body, comprising an outer glass sheet, an inner glass sheet, and an intermediate layer stacked together, wherein the outer glass sheet and the inner glass sheet are connected by the intermediate layer; A first busbar is located between the outer glass and the inner glass. The first busbar includes a plurality of first sub-wires, a plurality of second sub-wires, and a connecting portion. The first sub-wires and second sub-wires are located on different sides of the intermediate layer, and the first sub-wires and second sub-wires are electrically connected through the connecting portion, which passes through the intermediate layer. A second busbar is located between the outer glass pane and the inner glass pane. The first busbar and the second busbar are located on the same edge of the electrically heated glass, with the second busbar being closer to the edge of the electrically heated glass than the first busbar. A transparent heating film is located between the outer glass and the inner glass. The transparent heating film, the first sub-wire, and the second busbar are located on the same side. The transparent heating film is electrically connected to the first sub-wire and the second busbar, respectively.

2. The electrically heated glass as described in claim 1, characterized in that, The first sub-line, the second sub-line, and the connecting part are integrally formed.

3. The electrically heated glass as described in claim 1 or 2, characterized in that, The transparent heating film is provided with multiple first isolation lines, which divide the transparent heating film into multiple heating circuits arranged in parallel.

4. The electrically heated glass as described in claim 3, characterized in that, The heating circuit includes a first region, a second region, and a third region. The first region and the second region are separated by a second isolation line. The third region is located at the end of the first region and the second region away from the first busbar and the second busbar, and is electrically connected to the first region and the second region, respectively.

5. The electrically heated glass as described in claim 4, characterized in that, The second busbar is in contact with both the first region and the second region, the first sub-busbar is in contact with either the first region or the second region, and the first sub-busbar is closer to the third region than the second busbar.

6. The electrically heated glass as described in claim 3, characterized in that, Multiple heating circuits are arranged sequentially along the length of the electrically heated glass, and the heating circuits bend and extend between the first sub-line and the second busbar.

7. The electrically heated glass as described in claim 4, characterized in that, Along the length of the electrically heated glass, the size of the first sub-line is less than or equal to the size of the first region or the second region it contacts.

8. The electrically heated glass as described in claim 1 or 2, characterized in that, At least a portion of the first sub-line is located within the intermediate layer, and / or at least a portion of the second sub-line is located within the intermediate layer.

9. The electrically heated glass as described in claim 1 or 2, characterized in that, The electrically heated glass includes an upper edge and a lower edge, the upper edge and the lower edge being opposite to and spaced apart along the width direction of the electrically heated glass, and the lower edge being closer to the bottom of the vehicle relative to the upper edge; Both the first busbar and the second busbar are located at the lower edge.

10. The electrically heated glass as described in claim 1 or 2, characterized in that, The electrically heated glass is used for side window glass.

11. A vehicle, characterized in that, The vehicle includes a body panel and electrically heated glass as described in any one of claims 1-10, wherein the electrically heated glass is mounted on the body panel.

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