The present invention relates to a mobile X-ray apparatus for supplying operation power to an X-ray emitting unit through a lithium ion battery and controlling an overcurrent generated in X-ray emission. The X-ray apparatus includes the X-ray emitting unit, a control unit for controlling the X-ray emitting unit, a power source unit which includes the lithium ion battery and supplies the operation power to the X-ray emitting unit and the control unit, and a charging unit for charging the lithium ion battery.COPYRIGHT KIPO 2018리튬 이온 배터리를 통해 엑스선 조사부에 동작 전원을 공급하고, 엑스선 조사 시 발생하는 과전류를 제어하는 모바일 엑스선 장치를 나타낸다.