Provided are mobile X-ray apparatuses including lithium ion batteries and methods of operating the mobile X-ray apparatuses.

Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments.

According to an aspect of an embodiment, a mobile X-ray apparatus includes: an X-ray radiator; a controller configured to control the X-ray radiator; and a power supply including a lithium ion battery configured to supply an operating power to the X-ray radiator and the controller and a battery management system (BMS) configured to control an operation of a protection circuit for protecting the lithium ion battery.

The BMS is further configured to change, during X-ray emission by the X-ray radiator, reference values for operating the protection circuit against overcurrent.

The BMS is further configured to change, during X-ray emission by the X-ray radiator, a reference value for operating the protection circuit against over-discharge.

The BMS is further configured to increase, based on an X-ray emission preparation signal, an overcurrent reference value for operating the protection circuit and decrease an over-discharge reference value for operating the protection circuit.

The BMS is further configured to respectively change, based on an X-ray emission completion signal, the changed overcurrent reference value and the changed over-discharge reference value back to the same overcurrent and over-discharge reference values as before.

The BMS is further configured to prevent the protection circuit from protecting against at least one of overcurrent and over-discharge during the X-ray emission by the X-ray radiator.