A lithium battery electrolyte and lithium battery with high safety self-blocking

Abstract

The invention discloses high-safety and self-blocking lithium battery electrolyte. The high-safety and self-blocking lithium battery electrolyte and lithium battery is prepared from lithium salt, an organic solvent and an additive; based on the mass percentage of the electrolyte, the additive is prepared from 1 to 5 percent of ethylene fluorocarbonate, 1 to 3 percent of 1,3-propane sultone, 0.5 to3 percent of methylene methanedisulfonate, 0.5 to 3 percent of tri(trimethane) boric acid enzyme and 3 to 10 percent of fluorobenzene; the organic solvent is a carbonate type solvent. The high-safetyand self-blocking lithium battery electrolyte disclosed by the invention can generate a self-destruction behavior to cause termination reaction when being used for a discharging-state battery which is stored for more than one year under a discharging state (0 percent SOC (State of Charge)) and at room temperature or is stored in the environment with the temperature greater than 55 DEG C, so thatthe safety of a product can be improved.

Description

technical field [0001] The invention relates to a high-safety self-blocking lithium battery electrolyte and a lithium battery, belonging to the technical field of lithium ion secondary batteries. Background technique [0002] In response to energy demand and the development of electronic products, the safety of lithium-ion secondary batteries has been a matter of great importance to all R&D personnel and manufacturers in recent years, especially the rapid development of batteries for 3C mobile products in recent years. , but it often happens when the battery is charged and explodes and burns. Some problems with these electronic products are that the battery manufacturers themselves have improper management and protection behaviors and poor designs, which lead to high-risk safety issues for consumers in use. There are also some accidents caused by consumers’ improper use of the product itself, which causes problems such as explosion and fire of battery products. This inventio...

AI Technical Summary

Problems solved by technology

[0002] In response to energy demand and the development of electronic products, the safety of lithium-ion secondary batteries has been a matter of great importance to all R&D personnel and manufacturers in recent years, especially the rapid development of batteries for 3C mobile products in recent years. , but it often occurs when the battery is charged and exploded. Some problems with these electronic products are that the battery manufacturer itself has improper management and protection behavior and poor design, which leads to high-risk safety issues for consumers in use.

There are also some accidents caused by consumers’ improper use of the product itself, which causes problems such as explosion and fire of battery products. This invention mainly relates to the improvement of lithium battery formula. Variation occurs, and when it is used again, it may cause lithium deposition inside the battery, which will lead to a short circuit inside the battery, generate high heat, and cause a certain probability of failure

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