The special power supply for parking air conditioners and caravans uses long-life and high-safety lithium iron phosphate aluminum shell cells with high energy density, small size and light weight; Support fast charging; Long endurance, low self consumption and long battery life; The integrated intelligent BMS management system can monitor and protect the battery overcharge, over-discharge, over-temperature, short circuit and current abnormality, remotely monitor the battery operation parameters through the Bluetooth intelligent APP, and install the temperature management system inside, which can be used normally at minus 30 degrees; Mainly used for truck parking air conditioning and starting; The motor home is powered by electric appliances.