Analysis of injection method of polymer lithium battery

The dried polymer lithium battery, additives and auxiliary equipment are taken into the glove box: the transition has to be carried out 3 times of ventilation (pumping to <-0.08Mpa or close to its withstand limit, the gas in the glove box should be used for inflation, not straight Use cylinder gas and inflate to the same pressure as the glove box before taking it into the box; dew point meter and other equipment and items that cannot be dried are taken into the glove box: the transition chamber must be ventilated 3-5 times before it can be taken Into the box; electrolyte mixing: the distribution ratio of each group is specified in accordance with the 'Relevant Regulations on Electrolyte AdditivesAdd the required amount of electrolyte to the electrolyte mixing container, add additives, then stir the electrolyte at medium speed with a strong mixer, add the remaining pure electrolyte after 5 minutes, and stir at medium speed for 5 minutes until the electrolyte is evenly mixed ( The exposure time of the electrolyte is controlled at 10±1 minutes), and then the electrolyte is divided into sealed electrolyte bottles through a 120-mesh filter for use; the electrolyte is used to the bottom of the barrel, due to the increase in nitrogen pressure, the electrolyte The dissolved gas in the medium increases, and the gas can be degassed by vacuuming in the vacuum box in the glove box; detailed operation: put the divided electrolyte bottle (open the lid) into the vacuum box, close the door, and slowly evacuate to- 0.05MPa, hold for 20 seconds (pay attention to the pumping speed, beware of electrolyte splashing), then slowly deflate to normal pressure, take it out and seal; the electrolyte barrel outside the glove box should be marked with color, and the marking should be clearly and uniformly: as written LB-3165A, LB-302VB; the additive barrel outside the glove box should be distinguished by a different color from the electrolyte, and clearly marked: such as 204; the processing department should set up a dedicated person to configure the electrolyte, and other people should not be free Configure electrolyte. When the additives enter the glove box, they are put into the bottles in the glove box. All the bottles containing additives must be hung with a sign, distinguished by color, and marked: Additives. Before configuring and using the electrolyte, PQC must confirm on the spot. After preparing an electrolyte, the processing staff and PQC monitoring personnel fill in the 'Electrolyte Mixing Record Form' to confirm OK before processing. Liquid injection: According to the battery model, inject the specified liquid injection volume. Use 3.5, 12, 20ml Haiba pumps to inject liquid within the allowable error range; when the electrolyte in the liquid container is less, you can use a plastic dropper to manually inject the liquid. After the battery is filled with the electrolyte, Place in the glove box for more than 10 minutes (according to the last battery filled) and then vacuum; vacuum after filling: slowly vacuum to -0.06MPa in 2 times (the first stage takes 20±2 seconds to vacuum to -0.02 MPa, and hold for 4±1 seconds, then exhaust gas in 13~15 seconds; in the second stage, use 40±2 seconds to pump to -0.06MPa, and hold it for 4±1 seconds, then exhaust gas in 33~35 seconds) The entire degassing process must be carried out slowly and evenly to prevent the electrolyte from being blown out of the packaging film. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Advantages of lithium batteries and the key to selection