Ultralow-temperature lithium ion battery and preparation method thereof

• Main Authors: HUANG YAOZE, HUANG BIYING, TANG TIANWEN
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses an ultralow-temperature lithium ion battery and a preparation method thereof. The lithium ion battery mainly consists of five parts, namely a positive plate, a negative plate, a ceramic diaphragm, electrolyte and a battery shell, and is prepared by the following steps of: combining the positive plate, the ceramic diaphragm, the negative plate and the ceramic diaphragm, performing stacking or winding, putting the product into the battery shell, injecting the electrolyte, performing opening for formation, performing sealing and grading capacity. To be specific, the method comprises: S1, preparing a positive plate; S2, preparing a negative plate; S3, preparing a ceramic diaphragm; S4, preparing an electrolyte; S5, preparing a dry battery cell; and S6, preparing a battery shell comprising an inner shell body and an outer shell body, forming a buffer space between the inner shell body and the outer shell body, the interior of the buffer space being in a vacuum state, and arranging a shell f