During the lithium battery dry rooms suppliers production process, the cells and shells operated in the sealing and liquid injection process have been dried, so they are extremely sensitive to moisture in the air in the workshop. Once the moisture content in the air in the room is too high and absorbed by the battery, it will cause damage to the battery. There are many problems such as bulging, liquid leakage, etc. Therefore, effective environmental control of lithium battery sealing and liquid injection processes is a very important link in the lithium battery production process. Sealing in the production process of lithium batteries, battery sealing in liquid injection process. Battery sealing refers to putting the dried battery cells into the battery shell (pp shell), sealing the surroundings of the battery shell with sealing equipment, installing pole nuts and cutting off the battery hot-melt overflow, and then re-entering the furnace drying.

ZCH-Series Low Dew Point Desiccant Dehumidifiers


Battery filling. Transfer the dried battery to a glove box or an automatic liquid injection machine to add electrolyte. After the liquid injection, the battery is a finished battery, which is transformed into a workshop. It can be seen from the above process that the battery drying room and the battery liquid injection glove box are the places where the battery contacts with the outside world. The environmental control of this station should be very strict to ensure the normal production requirements of lithium batteries. Because normal battery lithium battery production requires moisture The content is lower than 200ppm, so the dew point in the cell room is required to be higher than -42°C. The plant layout and functional areas of the sealing and filling workshop require very high dew point requirements in the battery drying room and automatic liquid injection machine.

Ordinary air-conditioning systems cannot meet the low dew point environment. Therefore, corresponding dehumidification equipment needs to be added to meet the current use needs. Considering the impact of personnel on the environmental dew point, each dry area also has strict restrictions on the number of people. In order to meet the above humidity requirements, only the adsorption secondary dehumidifier can meet the use requirements. Considering the dew point control in different areas of the site, two dehumidifiers are used on site to meet the use requirements, one of which is used for dew point -30 ℃ area control, and the other is used to control the -45°C and -60°C area control. After the fresh air is cooled by the front surface, it enters the treatment area of the first-stage runner. The water molecules in the air are absorbed by the hygroscopic agent in the rotation.

The dried air passes through the middle surface cooler and then enters the second-stage runner. The air is adjusted to the required temperature through the rear surface cooler (after heating) and sent to the workplace. Such a continuous cycle finally meets the requirements of humidity control and temperature control. The function of each functional section: the runner is to process the humidity of the mixed air to the required extreme working humidity, so that the dry air becomes the required humidity requirement; the rear surface cooling section or the rear heating section is to adjust the temperature of the dry air to The temperature point required by the workplace. The fan surface of the wheel in the processing air area absorbs water molecules and becomes saturated. It will automatically turn to the regeneration area for high-temperature regeneration treatment to restore the dehumidification capacity of the alignment wheel.