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 and a plurality of heating wires, the glass body comprises outer glass, inner glass and a middle layer, and the outer glass and the inner glass are connected through the middle layer; the first bus is positioned between the outer glass sheet and the inner glass sheet; the second bus is located between the outer piece of glass and the inner piece of glass, the second bus comprises a first sub-line and a second sub-line, the first sub-line and the second sub-line are located on different sides of the middle layer respectively, and the first sub-line and the second sub-line are electrically connected; the plurality of heating wires are located between the outer glass and the inner glass, the plurality of heating wires, the first bus and the first sub-wire are located on the same side of the middle layer, and the plurality of heating wires are electrically connected with the first bus and the first sub-wire respectively. According to the technical scheme, the defogging and defrosting performance can be met on the basis that the appearance and the view of a driver are not affected.

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: A glass body, comprising an outer glass pane, an inner glass pane, and an intermediate layer, wherein the outer glass pane and the inner glass pane are connected through the intermediate layer; The first busbar is located between the outer glass and the inner glass; The second busbar is located between the outer glass and the inner glass. The second busbar includes a first sub-busbar and a second sub-busbar. The first sub-busbar and the second sub-busbar are located on different sides of the intermediate layer, and the first sub-busbar and the second sub-busbar are electrically connected. Multiple heating wires are located between the outer glass and the inner glass. The multiple heating wires, the first busbar, and the first sub-wire are located on the same side of the intermediate layer. The multiple heating wires are electrically connected to the first busbar and the first sub-wire, respectively.

[0005] It is understood that in the embodiments of this application, the power supply can make the heating current flow through multiple heating wires through the first bus and the second bus. The multiple heating wires generate heat under the action of the heating current, thereby enabling the electrically heated window glass to have functions such as defrosting, defogging, and de-icing.

[0006] Because electrically heated glass uses multiple heating wires for heating, using these heating wires with excellent miniaturization properties as the heating element in electrically heated glass allows the heating wires to be visually inconspicuous due to their small diameter. This enables the defrosting and defogging performance of electrically heated glass to be met without affecting its appearance or the driver's visibility.

[0007] In one possible implementation, the second 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.

[0008] In one possible implementation, the first sub-line, the second sub-line, and the connecting portion are integrally formed.

[0009] 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.

[0010] 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 first busbar being closer to the edge of the electrically heated glass than the second busbar.

[0011] In one possible implementation, there are multiple first sub-wires, and the electrically heated glass includes multiple heating zones. The multiple heating zones are arranged in parallel and sequentially along the length of the electrically heated glass. Each heating zone includes a portion of the glass body, a portion of the first busbar, at least a portion of one of the first sub-wires, and multiple heating wires.

[0012] In one possible implementation, within the same heating zone, a plurality of heating wires are nested sequentially and spaced apart in a direction from the center region of the heating zone to the edge region of the heating zone. The plurality of heating wires extend and bend between the first busbar and the same first sub-wire, or the plurality of heating wires extend and bend between the first busbar and the same second sub-wire.

[0013] In one possible implementation, within the same heating zone, the heating wire located in the central region of the heating zone is a central heating wire, and the distance between the two ends of the central heating wire is greater than the distance between the remaining parts of the central heating wire. In one possible implementation, among the plurality of heating zones, the power density of the heating zone located in the rearview mirror auxiliary field of view area of ​​the electrically heated glass is greater than the power density of the other heating zones.

[0014] In one possible implementation, the width of any one of the heating zones is greater than or equal to 30 mm.

[0015] In one possible implementation, within the same heating zone, the distance d between two adjacent heating wires and the length L of a single heating wire satisfy the following relationship: ; Where V is the operating voltage of the heating wire, and Pd R is the power density of the heating zone. m The resistance per unit length of the heating wire is given.

[0016] In one possible implementation, within the same heating zone, the spacing d between two adjacent heating wires satisfies the following relationship: 1.0mm ≤ d ≤ 5mm.

[0017] In one possible implementation, the power density P of the heating zone d Satisfies the relation: 450W / m 2 ≤P d ≤1000W / m 2 .

[0018] In one possible implementation, the diameter of any one of the heating wires is less than or equal to 30 μm.

[0019] In one possible implementation, the electrically heated glass includes a lower edge, with both the first busbar and the second busbar located at the lower edge and intended to be covered by water-cutting.

[0020] In one possible implementation, the electrically heated glass is a side window glass.

[0021] 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

[0022] Figure 1 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application; Figure 2 This is a perspective structural diagram of an electrically heated glass provided in an embodiment of this application; Figure 3 yes Figure 2 A partial structural diagram of the electrically heated glass is shown. Figure 4 It is along Figure 2 A schematic cross-sectional view of a portion of the structure of the electrically heated glass obtained by cutting along section line AA. Figure 5 This is a schematic diagram of a portion of the structure of the electrically heated glass provided in an embodiment of this application; Figure 6 yes Figure 3 A magnified view of region B in the middle.

[0023] Figure label: Vehicle 200, body sheet metal 210, electrically heated glass 100, upper edge 110, lower edge 120, glass body 10, first busbar 20, second busbar 30, heating wire 40, outer glass 11, inner glass 12, first surface 111, second surface 112, third surface 121, fourth surface 122, intermediate layer 13, first sub-wire 31, second sub-wire 32, connecting part 33, heating circuit W, heating area 50, central heating wire 41, rearview mirror auxiliary vision area Q. Detailed Implementation

[0024] For ease of understanding, the terminology used in the embodiments of this application will be explained first.

[0025] 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.

[0026] Multiple: refers to two or more.

[0027] 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.

[0028] The technical solutions in the embodiments of this application will be clearly described below with reference to the accompanying drawings.

[0029] Embodiments of this application provide an electrically heated glass and a vehicle.

[0030] Please see Figure 1 , Figure 1 This is a schematic diagram of a vehicle 200 provided in an embodiment of this application.

[0031] 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.

[0032] It should be noted that, Figure 1 The purpose is merely to illustratively describe 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, and quantities of each component. In other embodiments of this application, the vehicle 200 may include... Figure 1 This may involve more or fewer components, or combining certain components, or splitting certain components, or different component arrangements. Figure 1 The components shown can be implemented in hardware, software, or a combination of both.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Please refer to the following: Figure 2 and Figure 3 , Figure 2 This is a perspective structural diagram of an electrically heated glass 100 provided in an embodiment of this application. Figure 3 yes Figure 2 A partial structural schematic diagram of the electrically heated glass 100 is shown. Figures 2-3 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 bold dashed lines in the electrically heated glass 100 are schematic partition lines and do not represent the actual partition shape or actual partition boundary lines of the electrically heated glass 100.

[0038] 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.

[0039] 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.

[0040] The electrically heated glass 100 may include a glass body 10, a first busbar 20, a second busbar 30, and a plurality of heating wires 40. The first busbar 20, the second busbar 30, and the plurality of heating wires 40 may all be connected to the glass body 10. The first busbar 20 and the second busbar 30 may both be electrically connected to the plurality of heating wires 40, allowing current to flow through them, thereby enabling the plurality of heating wires 40 to heat the glass body 10 and achieve the defrosting and defogging functions of the electrically heated glass 100. The polarity of the first busbar 20 and the second busbar 30 may be opposite. That is, the polarity of the first busbar 20 may be either positive or negative, and the polarity of the second busbar 30 may be either positive or negative.

[0041] Please see Figure 4 , Figure 4 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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 100100 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.

[0047] 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.

[0048] 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.

[0049] Please refer to the following: Figure 2 and Figure 5 , Figure 5 This is a schematic diagram of a portion of the structure of the electrically heated glass 100 provided in an embodiment of this application. Figure 5 In the middle, the dashed lines are schematic division lines in the electrically heated glass 100.

[0050] In the embodiments of this application, the first busbar 20 may be located between the outer glass 11 and the inner glass 12. Exemplarily, the first busbar 20 may extend along the length direction (X direction in the figure) of the electrically heated glass 100. The polarity of the first busbar 20 may be positive. The material of the first busbar 20 may be metal foil, conductive silver paste, etc.

[0051] Specifically, the first busbar 20 can be located between the second surface 112 of the outer glass 11 and the intermediate layer 13. The first busbar 20 can be connected to the intermediate layer 13. Alternatively, the first busbar 20 can be located between the third surface 121 of the inner glass 12 and the intermediate layer 13. The first busbar 20 can be connected to the intermediate layer 13.

[0052] Please see Figure 4 and Figure 5The second busbar 30 can be located between the outer glass 11 and the inner glass 12, and is spaced apart from the first busbar 20. A portion of the second busbar 30 can be located on the same side of the intermediate layer 13 as the first busbar 20, and another portion of the second busbar 30 can be located on a different side of the intermediate layer 13 from the first busbar 20.

[0053] This configuration allows a portion of the second busbar 30 to be mounted on the same layer as the first busbar 20, while another portion is mounted on a different layer. This achieves better electrical isolation between the first busbar 20 and the second busbar 30 without requiring additional insulation. "Modular mounting" means the two components can be on the same plane or layer. "Electrical isolation" refers to severing 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 descriptions of "modular mounting" and "electrical isolation" in the following text can be understood similarly and will not be elaborated further.

[0054] For example, the second busbar 30 may extend along the length direction of the electrically heated glass 100 and be spaced apart from the first busbar 20 along the width direction (Y direction in the figure) of the electrically heated glass 100. Optionally, the second busbar 30 may be arranged parallel to the first busbar 20. The second busbar 30 may be located away from the lower edge 120 of the electrically heated glass 100 relative to the first busbar 20. The polarity of the second busbar 30 may be negative. The material of the second busbar 30 may be metal foil, conductive silver paste, etc.

[0055] In some other embodiments, the first busbar 20 and the second 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.

[0056] In embodiments of this 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 may be located on different sides of the intermediate layer 13. The first sub-busbar 31 may be electrically connected to the second sub-busbar 32. Specifically, the first sub-busbar 31 may be located on the same side of the intermediate layer 13 as the first busbar 20 and may be electrically connected to the first busbar 20. That is, the first sub-busbar 31 and the first busbar 20 are disposed on the same layer. The second sub-busbar 32 may be located on a different side of the intermediate layer 13 from the first busbar 20 and may be electrically isolated from the first busbar 20. That is, the second sub-busbar 32 and the first busbar 20 may be disposed on different layers.

[0057] For example, the first sub-line 31 may be spaced apart from the first busbar 20 in the width direction (Y direction in the figure) of the electrically heated glass 100. In the thickness direction (Z direction in the figure) of the electrically heated glass 100, the projection of the second sub-line 32 on the glass body 10 may be spaced apart from the projection of the first busbar 20 on the glass body 10, or the projection of the second sub-line 32 on the glass body 10 may at least partially overlap with the projection of the first busbar 20 on the glass body 10.

[0058] The first sub-line 31 and the first busbar 20 can be 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 can be 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.

[0059] Alternatively, the first sub-line 31 and the first busbar 20 can both be located between the inner glass 12 and the intermediate layer 13, that is, both are located between the third surface 121 of the inner glass 12 and the intermediate layer 13. The second sub-line 32 can be located between the outer glass 11 and the intermediate layer 13, that is, both are located between the second surface 112 of the outer glass 11 and the intermediate layer 13.

[0060] For example, the second busbar 30 can be inserted into the intermediate layer 13 by creating an opening, such that the first sub-wire 31 and the second sub-wire 32 of the second busbar 30 are located on opposite surfaces of the intermediate layer 13. After the second busbar 30 is inserted into the intermediate layer 13, it can be heated to 100°C to 300°C (including the endpoint values ​​of 100°C and 300°C) using a heating tool (such as a soldering iron), thereby heat-soldering the second busbar 30 to the intermediate layer 13.

[0061] It is understandable that by interlacing the second busbar 30 within the intermediate layer 13, the first sub-line 31 and the second sub-line 32 can be positioned on opposite sides of the intermediate layer 13. This allows the first sub-line 31 and the second sub-line 32 to maintain a certain distance from each other through the intervening effect of the intermediate layer 13. Furthermore, since the first sub-line 31 and the first busbar 20 are located on the same side of the intermediate layer 13, the second sub-line 32 and the first busbar 20 can also maintain a certain distance from each other through the intervening effect of the intermediate layer 13, thereby achieving better electrical isolation between the second sub-line 32 and the first busbar 20.

[0062] Furthermore, at least a portion of the first sub-wire 31 is located within the intermediate layer 13, and / or at least a portion of the second sub-wire 32 is located within the intermediate layer 13. In this configuration, at least a portion of the second busbar 30 can be embedded within the intermediate layer 13, achieving a "threading" structure for the second busbar 30 on the intermediate layer 13. This not only improves the connection strength and reliability between the second busbar 30 and the intermediate layer 13 but also facilitates the thinning of the electrically heated glass 100. Moreover, the second busbar 30 does not require segmentation, simplifying the design and process, and facilitating industrial mass production.

[0063] Furthermore, there can be multiple first sub-lines 31 and multiple second sub-lines 32. The structures of the multiple first sub-lines 31 can be similar, identical, or different. The structures of the multiple second sub-lines 32 can be similar, identical, or different. In the second busbar 30, the multiple first sub-lines 31 and the multiple second sub-lines 32 can be arranged alternately. A second sub-line 32 is provided between two adjacent first sub-lines 31. That is, along the extension direction of the second busbar 30, the second busbar 30 can form a layout structure of "first sub-line 31 - second sub-line 32 - first sub-line 31 - ... - first sub-line 31".

[0064] In embodiments of this application, the second 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. Specifically, 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.

[0065] Therefore, the second busbar 30 can be structurally arranged in the intermediate layer 13 while maintaining its integrity as a complete busbar. Since the second busbar 30 is not a disconnected structure, it can balance current continuity with ease of processing and manufacturing.

[0066] The number of connecting parts 33 can be multiple. The structures of the multiple connecting parts 33 can be similar, identical, or different. Each connecting part 33 is connected between 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 between an adjacent first sub-line 31 and a second sub-line 32. That is, along the extension direction of the second busbar 30, the second 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".

[0067] Furthermore, in the second busbar 30, the first sub-busbar 31, the second sub-busbar 32, and the connecting portion 33 can be integrally formed. The integrally formed second 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.

[0068] Please see Figure 2 ,exist Figure 2 In the middle, the dashed line extending along the X direction is the edge line of the water cut of vehicle 200.

[0069] In the embodiments of this application, the first busbar 20 and the second busbar 30 may both be located on the same side edge of the electrically heated glass 100, with the first busbar 20 being closer to the edge of the electrically heated glass 100 than the second busbar 30. Specifically, the second busbar 30 and the first 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 second busbar 30 and the first busbar 20 may also extend along other edges of the electrically heated glass, without limitation.

[0070] It is understandable that 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 first busbar 20 and the second 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.

[0071] Furthermore, the first busbar 20 and the second busbar 30 can be covered by a water-cut edge (as shown in the figure, the first busbar 20 and the second busbar 30 are covered by the edge line of the water-cut edge). Thus, the first busbar 20 and the second busbar 30 can always be blocked by the water-cut edge, further ensuring that the first busbar 20 and the second busbar 30 are not visible in the appearance of the electrically heated glass 100, achieving transparent heating of the electrically heated glass 100 and improving the appearance of the electrically heated glass 100.

[0072] Please refer to the following: Figure 2 and Figure 3In embodiments of this application, multiple heating wires 40 may all be located between the outer glass 11 and the inner glass 12. Specifically, the multiple heating wires 40 may be located between the second surface 112 of the outer glass 11 and the intermediate layer 13. The multiple heating wires 40 may be connected to the intermediate layer 13. Alternatively, the multiple heating wires 40 may be located between the third surface 121 of the inner glass 12 and the intermediate layer 13. The multiple heating wires 40 may be connected to the intermediate layer 13. Exemplarily, the heating wires 40 may be tungsten wires.

[0073] Multiple heating wires 40 can be electrically connected to the first busbar 20. Multiple heating wires 40 can be partially electrically connected to and partially electrically isolated from the second busbar 30. Specifically, multiple heating wires 40 can be arranged in the same layer as the first busbar 20 and located on the same side of the intermediate layer 13. Multiple heating wires 40 can also be partially arranged in the same layer as the second busbar 30 and located on the same side of the intermediate layer 13. Multiple heating wires 40 can also be arranged in a different layer than the second busbar 30 and located on a different side of the intermediate layer 13. The second busbar 30 arranged in the same layer as the multiple heating wires 40 can be electrically connected to the multiple heating wires 40. The second busbar 30 arranged in a different layer than the multiple heating wires 40 can be electrically isolated from the multiple heating wires 40.

[0074] The diameter of any heating wire 40 can be less than or equal to 30 μm. With this configuration, because the heating wire 40 has a thinner diameter, it is easier to make the electrically heated glass 100 invisible, which helps improve the appearance of the electrically heated glass 100. The shape of any heating wire 40 can be wavy, zigzag, or curved.

[0075] In the embodiments of this application, multiple heating wires 40 are electrically connected to the first sub-wires 31 of the first busbar 20 and the second busbar 30, respectively. One end of any heating wire 40 can be electrically connected to the first busbar 20. The other end of any heating wire 40 can be electrically connected to the first sub-wire 31 of the second busbar 30 and electrically isolated from the second sub-wire 32 of the second busbar 30. Any heating wire 40, the first busbar 20, and the first sub-wire 31 of the second busbar 30 can form a heating circuit W. Multiple heating circuits W can be connected in parallel.

[0076] At this time, the first sub-wires 31 of the multiple heating wires 40, the first busbar 20, and the second busbar 30 can be located on one side (i.e., the same side) of the intermediate layer 13, and the second sub-wires 32 of the second busbar 30 can be located on the other side of the intermediate layer 13. Specifically, the first sub-wires 31 of the multiple heating wires 40, the first busbar 20, and the second busbar 30 can all be located between the outer glass 11 and the intermediate layer 13, and the second sub-wires 32 of the second busbar 30 can be located between the inner glass 12 and the intermediate layer 13. Alternatively, the first sub-wires 31 of the multiple heating wires 40, the first busbar 20, and the second busbar 30 can all be located between the inner glass 12 and the intermediate layer 13, and the second sub-wires 32 of the second busbar 30 can be located between the outer glass 11 and the intermediate layer 13.

[0077] Therefore, within the same heating circuit W, current can originate from the first busbar 20, flow through the heating wire 40, and reach the first sub-line 31 of the second busbar 30. Since the first busbar 20 and the second sub-line 32 of the second busbar 30 are arranged in different layers and have a certain distance difference between them, the second sub-line 32 of the second busbar 30 does not participate in the formation of the heating circuit W, thus achieving electrical isolation between the first busbar 20 and the second sub-line 32 of the second busbar 30.

[0078] In summary, the advantage of electrically connecting the first busbar 20 to the first sub-line 31 of the second busbar 30 and electrically isolating it from the second sub-line 32 of the second busbar 30 is that both the first busbar 20 and the second busbar 30 are complete busbars, not disconnected structures. Therefore, it can balance the continuity of current in the first busbar 20 and the second busbar 30, as well as the ease of processing and manufacturing of the first busbar 20 and the second busbar 30.

[0079] It is understood that in the embodiments of this application, the power supply can make the heating current flow through the first bus 20 and the second bus 30, and the multiple heating wires 40 generate heat under the action of the heating current, thereby enabling the electrically heated window glass to have functions such as defrosting, defogging, and de-icing.

[0080] Since the electrically heated glass 100 uses multiple heating wires 40 for heating, using such heating wires 40 with excellent miniaturization performance as the heating element in the electrically heated glass 100 allows the heating wires 40 to be visually inconspicuous due to their small wire diameter. This enables the electrically heated glass 100 to meet its defogging and defrosting performance requirements without affecting its appearance or the driver's visibility.

[0081] Furthermore, the power and resistance of the heating circuit W 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., heating wire 40), and S is the cross-sectional area of ​​the conductor. According to these formulas, the shorter the length L of the heating circuit W, 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 W.

[0082] In view of this, in the embodiments of this application, by forming multiple parallel heating circuits W in the electrically heated glass 100, the length of a single heating circuit W due to winding can be avoided, the length L of a single heating circuit W can be shortened, the resistance R can be reduced, thereby improving the heating performance of a single heating circuit W, and thus improving the overall heating performance of multiple parallel heating circuits W composed of multiple heating wires 40.

[0083] Please refer to the following: Figure 2 and Figure 3 In embodiments of this application, the electrically heated glass 100 may include multiple heating zones 50. The multiple heating zones 50 may be arranged sequentially in a direction parallel to the electrically heated glass 100 (the XY plane defined by the X and Y axes in the figure). The multiple heating zones 50 may be connected in parallel. Any one or more of the multiple heating zones 50 may simultaneously heat the electrically heated glass 100.

[0084] The width of any heating zone 50 (i.e., the dimension of the heating zone 50 along the X direction shown in the figure) can be greater than or equal to 30 mm. The power density P of any heating zone 50... d The relation can be satisfied: 450W / m 2 ≤P d ≤1000W / m 2 This ensures that the electrically heated glass 100 can effectively defrost. The structures of the multiple heating zones 50 can be similar, identical, or different. The multiple heating zones 50 can be arranged sequentially along the length direction of the electrically heated glass 100 (X direction in the figure). Among the multiple heating zones 50, the area of ​​the heating zone 50 along the length direction of the electrically heated glass 100 can be increased, decreased, or remain unchanged. Each heating circuit 43 can be controlled by additional electrical components and can supply multiple currents to flow independently within it, so as to independently realize the individual heating function of each heating zone 50, thereby enabling the multiple heating zones 50 to cooperate to realize the whole-surface heating function of the electrically heated glass 100, ensuring the heating area and heating uniformity of the electrically heated glass 100. In addition, the number of heating zones 50 can be selected according to actual needs and is not limited thereto. For example, as shown in the figure... Figure 2 As shown, the number of heating zones 50 can be sixteen.

[0085] It is understandable that forming multiple independent and parallel heating zones 50 within the electrically heated glass 100 allows for the utilization of its multi-zone heating characteristics, enabling full-area heating and increased power output. This helps improve the local resistivity within the electrically heated glass 100 and achieves rapid local heating while maintaining overall uniform heating. Furthermore, implementing multi-zone heating for the electrically heated glass 100 allows for a sufficiently short heating wire 40 within a single circuit, thereby enhancing the electrical heating performance of the electrically heated glass 100.

[0086] Specifically, any heating zone 50 may include a portion of the glass body 10, a portion of the first busbar 20, at least a portion of a first sub-line 31 of the second busbar 30, and multiple heating wires 40. Thus, the same heating zone 50 can have multiple heating circuits W connected in parallel. Heating circuits W between different heating zones 50 can also be connected in parallel. In this case, in any heating circuit W of the same heating zone 50, current can originate from the first busbar 20, flow through the heating wire 40, and reach a first sub-line 31 of the second busbar 30.

[0087] Please continue reading. Figure 2 and Figure 3 Within the same heating zone 50, multiple heating wires 40 can be nested and spaced apart sequentially from the center region to the edge region of the heating zone 50. In two adjacent heating wires 40, the length of the inner heating wire 40 can be less than the length of the outer heating wire 40. Within the same heating zone 50, multiple heating wires 40 can all bend and extend between the first busbar 20 and the same first sub-busbar 31.

[0088] It is understandable that by bending and extending a single heating wire 40 within the heating zone 50, the single heating wire 40 can achieve a larger coverage area within the limited layout space of the heating zone 50, thus fully ensuring the uniformity and consistency of heating at various locations within the heating zone 50.

[0089] Please refer to the following: Figure 3 and Figure 6 , Figure 6 yes Figure 3 A magnified view of region B in the middle.

[0090] Within the same heating zone 50, the heating wire 40 located in the central region of the heating zone 50 is designated as the central heating wire 41. The distance between the two ends of the central heating wire 41 is greater than the distance between the remaining portions of the central heating wire 41. Specifically, one end of the central heating wire 41 can be electrically connected to the first busbar 20, and the other end of the central heating wire 41 can be electrically connected to the first sub-wire 31 of the second busbar 30. The extension line of one end of the central heating wire 41 can intersect with the extension line of the other end of the central heating wire 41. One end of the central heating wire 41 can extend away from the other end of the central heating wire 41. For example, one end of the central heating wire 41 and the other end of the central heating wire 41 can be arranged in a figure-eight shape. The number of central heating wires 41 can be one or more. The structures of the multiple central heating wires 41 can be similar, identical, or different.

[0091] Understandably, since the central heating wire 41, located in the central area of ​​the heating zone 50, is positioned close to the separation point between the positive and negative polarity busbars (i.e., the first busbar 20 and the second busbar 30), the spacing between the two ends of the central heating wire 41 (i.e., the two ends connected to the first busbar 20 and the second busbar 30) is greater than the spacing between the rest of the central heating wire 41. This allows the two ends of the central heating wire 41 to be staggered in a figure-eight shape, ensuring that the two ends of the central heating wire 41 always maintain a certain interval, thus solving the problem of positional deviation and misalignment of the high-density heating wire 40 during the production process.

[0092] Please see Figure 2 ,exist Figure 2 In the electric heating glass 100, the area framed by the irregular frame is an exemplary division of the rearview mirror auxiliary field of view area Q in the electric heating glass 100.

[0093] Among the multiple heating zones 50, the power density of the heating zone 50 located in the rearview mirror auxiliary field of view area Q of the electrically heated glass 100 can be greater than the power density of the other heating zones 50. The rearview mirror auxiliary field of view area Q of the electrically heated glass 100 is the area within the electrically heated glass 100 where the exterior rearview mirror can be observed.

[0094] It is understandable that by making the power density of the heating zone 50 of the rearview mirror auxiliary vision area Q located in the electrically heated glass 100 greater than the power density of the other heating zones 50, the heating priority and heating speed of the rearview mirror auxiliary vision area Q can be improved, thereby achieving rapid defrosting and defogging in this area and making it easier for the driver inside the vehicle to observe the rearview mirror through this area.

[0095] In the embodiments of this application, within the same heating zone 50, the distance d (unit: m) between two adjacent heating wires 40 and the wire length L of a single heating wire 40 (i.e., the effective length of a single heating wire 40, unit: m) can satisfy the following relationship: ; Where V is the operating voltage of heating wire 40 (unit: V), P d Power density of heating zone 50 (unit: W / m²) 2 ), R m The resistance of the heating wire is 40 units long (unit: Ω / m).

[0096] For example, the power density P of the heating zone 50 located in the auxiliary field of vision area Q of the rearview mirror of the electrically heated glass 100 is... d It can be 600W / m 2 The power density P of other heating zones 50 d It can be 500W / m 2 The resistance R of the heating wire is 40 units in length. m The resistance can be 230Ω / m (e.g., the resistance of a tungsten wire with a diameter of 19.4µm), and the operating voltage V of the heating wire 40 can be 13.5V. The wire length L and spacing d calculated using the above parameters ensure that the heating zone 50 located in the rearview mirror auxiliary field of view area Q of the electrically heated glass 100 can defrost 100% within 10 minutes, and other areas can defrost 100% within 15 minutes. Furthermore, within the same heating zone 50, the calculated wire length of a single heating wire 40 can be used as an intermediate value according to the above formula, and the length deviation of all heating wires 40 within the heating zone 50 can be ≤10%.

[0097] It is understandable that by combining the power density within the heating zone 50 and the shape of the electrically heated glass 100, and through the aforementioned relationship, the optimal combination of spacing d and wire length L can be derived, effectively improving the heating performance within the heating zone 50. Within the same heating zone 50, the spacing between the heating wires 40 can be the same or different. Within different heating zones 50, the spacing between the heating wires 40 can also be the same or different (e.g., a variable value). For example, along the length direction of the electrically heated glass 100 (the X direction in the figure), the spacing between multiple heating zones 50 can gradually decrease, meaning the wiring density of the heating wires 40 in the multiple heating zones 50 can gradually increase.

[0098] Optionally, within the same heating zone 50, the distance d between two adjacent heating wires 40 can satisfy the relationship: 1mm ≤ d ≤ 5mm. For example, the distance d between two adjacent heating wires 40 can be ≤ 4mm.

[0099] In the embodiments of this application, the method for preparing the electrically heated glass 100 may include at least the following steps: Step 1: Using a planar wire laying device, the heating wire 40 is embedded in the middle layer 13 of the glass body 10 according to the design line drawing.

[0100] Step 2: Based on the different shapes of the electric heating glass 100, calculate and adjust the number of heating zones 50 in the electric heating glass 100 and the wiring density of the heating wire 40.

[0101] Step 3: Fix the first busbar 20 and the second busbar 30 to the intermediate layer 13 of the glass body 10.

[0102] 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 pane, an inner glass pane, and an intermediate layer, wherein the outer glass pane and the inner glass pane are connected through the intermediate layer; The first busbar is located between the outer glass and the inner glass; The second busbar is located between the outer glass and the inner glass. The second busbar includes a first sub-busbar and a second sub-busbar. The first sub-busbar and the second sub-busbar are located on different sides of the intermediate layer, and the first sub-busbar and the second sub-busbar are electrically connected. Multiple heating wires are located between the outer glass and the inner glass. The multiple heating wires, the first busbar, and the first sub-wire are located on the same side of the intermediate layer. The multiple heating wires are electrically connected to the first busbar and the first sub-wire, respectively.

2. The electrically heated glass as described in claim 1, characterized in that, The second busbar also 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.

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

4. The electrically heated glass as described in claim 1, 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.

5. The electrically heated glass according to any one of claims 1-4, characterized in that, The first busbar and the second busbar are located on the same side edge of the electrically heated glass, with the first busbar being closer to the edge of the electrically heated glass than the second busbar.

6. The electrically heated glass according to any one of claims 1-4, characterized in that, The number of first sub-wires is multiple, and the electric heating glass includes multiple heating zones. The multiple heating zones are arranged in parallel and sequentially along the length direction of the electric heating glass. Each heating zone includes a portion of the glass body, a portion of the first busbar, at least a portion of one first sub-wire, and multiple heating wires.

7. The electrically heated glass as described in claim 6, characterized in that, Within the same heating zone, multiple heating wires are nested and spaced apart in a direction from the center region of the heating zone to the edge region of the heating zone, and all multiple heating wires extend and bend between the first busbar and the same first sub-busbar.

8. The electrically heated glass as described in claim 6, characterized in that, Within the same heating zone, the heating wire located in the central region of the heating zone is the central heating wire, and the distance between the two ends of the central heating wire is greater than the distance between the remaining parts of the central heating wire.

9. The electrically heated glass as described in claim 6, characterized in that, Among the multiple heating zones, the power density of the heating zone located in the rearview mirror auxiliary field of view area of ​​the electrically heated glass is greater than the power density of the other heating zones.

10. The electrically heated glass as described in claim 6, characterized in that, The width of any one of the heating zones is greater than or equal to 30 mm.

11. The electrically heated glass as described in claim 6, characterized in that, Within the same heating zone, the distance d between two adjacent heating wires and the length L of a single heating wire satisfy the following relationship: ； Where V is the operating voltage of the heating wire, and P d R is the power density of the heating zone. m The resistance per unit length of the heating wire is given.

12. The electrically heated glass as described in claim 6, characterized in that, Within the same heating zone, the distance d between two adjacent heating wires satisfies the following relationship: 1mm≤d≤5mm.

13. The electrically heated glass as described in claim 6, characterized in that, The power density P of the heating zone d Satisfies the relation: 450W / m 2 ≤P d ≤1000W / m 2 .

14. The electrically heated glass according to any one of claims 1-4 and 7-13, characterized in that, The diameter of any one of the heating wires is less than or equal to 30 μm.

15. The electrically heated glass according to any one of claims 1-4 and 7-13, characterized in that, The electrically heated glass includes a lower edge, and both the first busbar and the second busbar are located at the lower edge and are used to be covered by water cutting.

16. The electrically heated glass according to any one of claims 1-4 and 7-13, characterized in that, The electrically heated glass is used for side window glass.

17. A vehicle, characterized in that, The vehicle includes a body panel and electrically heated glass as described in any one of claims 1-16, wherein the electrically heated glass is mounted on the body panel.

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