The invention belongs to the technical field of
new energy heavy
truck chassis battery swap stations, and particularly relates to a PLC control-based battery swap
station liquid cooling
control system, which comprises a PLC controller, and the PLC controller comprises a
signal acquisition unit, a
logic control unit, a data storage unit, a control output unit, a
bus and a 485 communication port. And the
signal acquisition is realized by a plurality of sensors for acquiring liquid cooling data of the battery swap
station. According to the liquid cooling
control system for the battery swap
station based on PLC control, the actual state of each sensor is obtained through conversion calculation according to the collected signals of the temperature sensor, the
pressure sensor, the
liquid level sensor and the like through the PLC, a compressor and an outer fan are automatically controlled through
Modbus communication to control the work of a refrigerating
system, the liquid outlet temperature is kept within a set value range, and the working efficiency is improved. The superheat degree of the
system is calculated according to the exhaust temperature of the compressor, and the superheat degree of the
system is controlled through an expansion valve controller; and finally, the cooling liquid output by the system is controlled by controlling the rotating speed of the water pump to ensure that sufficient cooling liquid flows into the charging bag for cooling.