Composite non-electrolyte additive for improving high-temperature safety performance of battery

A high-temperature performance, non-aqueous electrolyte technology, applied in the direction of secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve problems such as out-of-control batteries, flammability, explosions, etc., to meet the needs of high safety, guarantee Safety, the effect of improving safety
CN102544601AInactive Publication Date: 2012-07-04SHANGHAI INST OF SPACE POWER SOURCES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI INST OF SPACE POWER SOURCES
Publication Date
2012-07-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a composite nonaqueous electrolyte additive for improving the high-temperature safety performance of a battery. The safety and flame retardancy of the battery in a high-temperature state can be effectively improved, and the electrolyte is prevented from combusting and exploding due to battery overheating. The non-electrolyte additive for improving the high-temperature safety performance of the battery consists of fluorinated carbonic ester and alkyl phosphate. The non-electrolyte additive is an additive capable of effectively improving the safety of the battery in the high-temperature state; and the safety of the battery in the high-temperature state is effectively guaranteed, the electrical property of the battery is not influenced, and a requirement of customers on the high safety of the battery can be well met. The non-electrolyte additive can be applied to the conventional lithium ion batteries and lithium battery systems.
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Description

technical field

[0001] The invention relates to a nonaqueous electrolyte composite additive, in particular to a composite nonaqueous electrolyte additive which can effectively improve the safety performance of batteries under high temperature conditions. Background technique

[0002] As an important component of ion conduction in lithium batteries, non-aqueous electrolytes are basically stable in composition, mainly including EC, DMC, PC, EMC, DEC, etc. With the continuous expansion of the lithium-ion battery market, safety issues have become constraints for lithium-ion batteries. An important factor in the development of batteries, especially in the fields of electric vehicles and large-scale energy storage, puts forward higher and newer requirements for the safety of batteries. However, the electrolyte commonly used in lithium-ion batteries has a low flash point and is flammable, which has become a safety hazard during the use of lithium-ion batteries. Lithium-ion seconda...

Claims

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