In response to customer requirements designed to be used in emergency X-ray machines in the field, B-mode ultrasound machines, power outage emergency X-ray machines, and field medical equipment power supply requirements, we integrated the use characteristics of related equipment to design an emergency power supply lithium battery. The battery pack adopts high safety, high consistency, high stability, long life IFR26650 lithium iron phosphate batteries and imported chips, and MOS tubes are used to protect and control the battery pack. The entire battery pack has the ability to continuously work with high currents. The continuous output power can reach 1000W, and the instantaneous maximum power can reach 2KW. The battery pack can be equipped with UPS to provide emergency power supply for most medical equipment.