General Motors (GM) has filed a patent application with the United States Patent and Trademark Office (USPTO) for an advanced heated windshield design that uses embedded elements and draws power from an electric vehicle’s (EV) battery pack. The patent application was published on July 13, 2023, after being originally filed on January 12, 2022.
Currently, vehicles with internal combustion engines or EVs use hot air blown onto the windshield from internal vents to heat it. However, this method works gradually, initially clearing only small areas where the heated air first hits the windshield and expanding from there. GM aims to improve this process by embedding electrically conductive elements in the windshield surface, allowing for more even heating across the entire windshield.
Unlike the grids used for defrosting rear windows, GM’s design would not limit visibility. By spreading the conductive elements across the windshield surface, the heating process would be more efficient and effective. However, GM identifies a limitation in using the typical 12-volt AC automotive accessory electrical systems found in internal combustion cars. These systems cannot provide enough power to maximize the effectiveness of a heated windshield.
To overcome this limitation, GM proposes utilizing DC current from an EV’s battery pack. According to the patent application, the current would flow through bus bars and into a layer of conductive material applied to the surface of the windshield. Windshields are typically made with laminated glass, comprising multiple layers. This design allows the coated surface to be sandwiched between layers, radiating heat outward to defrost and remove ice, mist, and other obstructions to vision.
Related Post
While patented ideas don’t always make it to production, a heated windshield like the one described in the patent could have several benefits. Besides improving visibility in wintry conditions, it may also contribute to enhancing EV performance in cold weather. EVs often experience reduced range in low temperatures, and a more efficient windshield defrosting system could minimize this impact. Direct heating methods, such as heated seats, have been found to be more efficient than blowing warm air throughout the cabin. It is possible that the same principle could be applied to windshields, resulting in a more energy-efficient and effective defrosting solution for EVs.
GM’s patented heated windshield design represents the company’s commitment to innovation and finding sustainable solutions for vehicle technology. As the automotive industry continues to transition towards electrification, GM’s focus on improving EV features and addressing cold-weather challenges demonstrates their dedication to providing a superior driving experience for EV owners.
In conclusion, General Motors’ patent application for an advanced heated windshield design exemplifies the company’s innovative approach to vehicle technology. By embedding electrically conductive elements and using power from an EV’s battery pack, GM aims to create a more efficient and effective windshield defrosting system. If successfully implemented, this technology could improve visibility in wintry conditions and enhance EV performance in cold weather, ultimately providing a superior driving experience for EV owners.
