Abstract: An embodiment structural battery for an electric vehicle includes an upper rail and a lower rail coupled with the upper rail, wherein the upper rail and the lower rail are electrically connected with each other by a terminal and a wiring, so that the upper rail and the lower rail electrically connected with each other serve as both the structural battery and a roof rail of a vehicle body.

Abstract: An embodiment structural battery for an electric vehicle includes a plurality of cells stacked on each other, each of the plurality of cells including a positive electrode layer, an electrolyte layer, and a negative electrode layer stacked with the electrolyte layer between the positive and negative electrodes, wherein the plurality of cells define a battery by electrical connection of a positive electrode terminal and a negative electrode terminal respectively provided in the plurality of cells, structure reinforcement layers stacked on each of an outermost upper layer and an outermost lower layer of the plurality of cells, and carbon fiber current collecting layers stacked between each of the structure reinforcement layers and the plurality of cells.

Abstract: A vacuum cleaner having a suction nozzle lamp which can light and observe a forward are of a suction nozzle for collecting dust or alien substances without being overheated. A reflection plate with a predetermined shape is formed inside a lower case forming a suction nozzle with a suction opening for sucking dust or alien substances, and a window is formed at the forward area of the reflection plate and at the lower case to light the forward area after light is reflected by the reflection plate. A suction nozzle lamp is formed between the reflection plate and the window. A strip-type electric bulb is located between the reflection plate and the window by first and second terminals or a socket terminal, thereby emitting enough light to the forward area of the suction nozzle to perform cleaning without being overheated.