For all-solid-state batteries, the interface contact state between the solid electrolyte and the electrode active material directly affects the battery performance. It is mainly because the contact between the solid electrolyte and the electrode active material is not good, which increases the contact resistance between the two, and also causes the internal resistance of the entire battery to be too large, and lithium ions cannot move well between the electrode and the electrolyte. , Reduces the battery capacity, and also results in lower durability and higher interface resistance. At present, to improve the safety of lithium-ion batteries, an effective method is to use all-solid-state batteries. On the one hand, simplifying the battery safety device greatly improves safety while reducing costs.
Provide an automated production line for solid-state lithium-ion batteries. This production line is a fully automated production line for round solid-state batteries. The entire process is completed in a glove box, ensuring that the entire process is produced in an oxygen-free and water-free environment, ensuring product quality. .
In order to ensure that the positive electrode material, solid electrolyte, and negative electrode material are accurately injected, the process features are as follows: 1. The positive electrode material is powdered. The key point is to use a spiral powder injection method with vibration so that the positive electrode material powder is not injected. During the process, no residue is attached to the tube wall, which ensures the accuracy of powder injection of the cathode material. 2. Solid electrolyte powder injection, which uses high temperature to melt the solid electrolyte first, and then high temperature injection to ensure the accuracy of solid electrolyte powder injection. 3. Powder injection of negative electrode material, which also melts the negative electrode material first, and then performs high temperature liquid injection to ensure the accuracy of powder injection of the negative electrode material.