Automobile laminated glass capable of being uniformly and electrically heated

Abstract

Provided is automobile laminated glass capable of being uniformly and electrically heated. A glass substrate (1) is coated with an electrothermal film (2). An edge nonconductive area is arranged on the edge of the electrothermal film (2) on the glass substrate (1). The automobile laminated glass is characterized in that the electrothermal film (2) is provided with a upper bus (3.1) and a lower bus (3.2); a nonconductive partition line (5) is arranged under the lower bus (3.2) and divides the electrothermal film (2) into a main view heating area and a wiper stationary position heating area; the automobile laminated glass is also provided with a first auxiliary bus main body portion (7.3); and the first auxiliary bus main body portion (7.3) passes through the nonconductive partition line (5) and the wiper stationary position heating area and is in electric contact with the lower bus (3.2). The automobile laminated glass has advantages of giving priority to the heating of the wiper stationary position heating area with the least connectors, generating equal heating power, and achieving a uniform heating effect.

Description

technical field [0001] The invention relates to the technical field of electric heating of automobile glass, in particular to an automobile laminated glass capable of uniform electric heating. Background technique [0002] The invention relates to a laminated glass, in particular to windshield glass, side window glass, rear glass and skylight glass of vehicles. This type of glass consists of a single pane of window glass bonded to another single pane of glass with a clear plastic such as polyvinyl butyral (PVB). [0003] At present, there are roughly two heating methods on the market for the front glass of automobiles: [0004] 1. Print the silver-containing conductive solution (hereinafter referred to as "silver paste") on the glass by screen printing and then bake it. Use welding or pasting to make electrical connections, and connect the positive and negative poles of the power supply to allow the current to pass through. To achieve the effect of heating. It is known th...

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Problems solved by technology

[0013] In patent CN02824670.5, the number of electrode settings (commonly referred to as "joints") is too large; although the patent mentions that "in many cases, two One of the auxiliary bus bars of the same pole as the lower bus bar may not be connected to the power supply", but the premise is that "the voltage loss along this bus bar does not exceed a limited value"; it is found in practice that using the vehicle voltage 14V To achieve the ideal heating effect, the surface resistance of the film should be less than 1 ohm / □, and the resistance of the bus bar is usually not much different. If only one section is connected to the "connector", there will inevitably be a certain voltage loss, which will lead to a distance from the connector position. The farther the distance is, the worse the heating effect is. In order to achieve a uniform heating effect, it needs to connect both ends of the "joints", which will cause too many joints. Usually, the OEM requires the number of joints N<=4, (N takes a positive integer ), which cannot meet the requirements of OEMs

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