As an important achievement of modern science and technology, the performance and stability of battery modules play a crucial role in electric vehicles, energy storage systems and other fields. In order to ensure the reliability and safety of the battery module in various environments, the high and low temperature liquid cooling test machine has become an indispensable test equipment. During the operation of the high and low temperature liquid cooling test machine, the filling and discharging method of the coolant is directly related to the test effect and the maintenance of the equipment.

　　1. Coolant filling method

　　1, determine the filling port position: the coolant filling port of the battery module high and low temperature liquid cooling test machine is usually located on the top or side of the equipment, the specific location varies according to the equipment model and design. Before filling, the position of the filling port should be determined first.

　　2, prepare the coolant: according to the equipment requirements and manufacturer's recommendation, choose the appropriate coolant. The coolant should have good thermal conductivity, low freezing point and high boiling point to ensure that it can play a good cooling effect in both high and low temperature environments.

　　3. Fill coolant: Before filling, ensure that the filling port and the surrounding area are clean to prevent impurities and dirt from entering the cooling system. Then, slowly pour the coolant into the filling port while watching the liquid level indicator to ensure that the coolant is filled in the proper position.

　　Two, coolant discharge method

　　1, determine the outlet location: similar to the filling port, the coolant outlet is usually located at the bottom or side of the equipment. Before discharge, the location of the discharge outlet should be determined.

　　2, prepare discharge equipment: In order to ensure that the coolant can be successfully discharged, the corresponding discharge equipment should be prepared, such as discharge pipes, collection containers, etc. At the same time, discharge equipment should be kept clean to prevent coolant contamination.

　　3, discharge of coolant: before discharge, the power supply of high and low temperature liquid cooling test machine should be turned off to ensure that the equipment is in a safe state. Then, open the outlet, connect the drain line to the outlet, and place the other end into the collection container. Finally, open the drain valve and slowly drain the coolant. During the discharge process, attention should be paid to the color and state of the coolant in order to discover and deal with possible problems in time.

　　Third, precautions

　　1. When filling and discharging the coolant, the operating guidelines and safety specifications of the equipment manufacturer should be followed to ensure the safety and correctness of the operation process.

　　2. When filling and discharging the coolant, the equipment should be kept clean and tidy to prevent impurities and dirt from entering the cooling system or polluting the environment.

　　3, regularly check the coolant level and quality, timely supplement or replace the coolant to ensure the normal operation of the equipment and test effect.

　　4, in the treatment of coolant, should pay attention to its possible impact on the environment, and take appropriate environmental protection measures for treatment and disposal.

　　In short, the coolant filling and discharging method of the battery module high and low temperature liquid cooling test machine is an important part of equipment maintenance and operation. Correct operation methods and precautions can ensure the normal operation and test effect of the equipment, but also can extend the service life of the equipment and reduce maintenance costs.