汽车电装用碳刷是用在汽车电机内起整流作用的部件，汽车电机分传统燃油车用电机如雨刮摇窗天窗后视镜用电机以及为了提高驾驶舒适性的便利性电机如座椅电机等，目前EV车销量激增，EV车用电压比传统燃油车电压高，适用碳刷材质也有所调整。

Automotive brushes are used in vehicle motors for rectification purposes. These motors include those in traditional fuel-powered vehicles—such as wiper, window, sunroof, and mirror motors—as well as convenience motors that enhance driving comfort, like seat adjustment motors. With the rapid growth in electric vehicle (EV) sales, brush materials have been adapted to accommodate higher voltage requirements in EVs compared to conventional vehicles.