Non-aqueous electrolyte of primary lithium battery and primary lithium battery

Abstract

The invention relates to non-aqueous electrolyte of a primary lithium battery. The non-aqueous electrolyte comprises a lithium salt, a high-flash-point and low-melting-point solvent and a low-viscosity solvent, wherein the high-flash-point and low-melting-point solvent comprises at least one of propylene carbonate, dimethyl methylphosphonate, diethyl methylphosphonite, diethyl ethanephosphonate, dimethyl ethylphosphonate and gamma-butyrolactone; the flash point of the high-flash-point and low-melting-point solvent is greater than 60 DEG C; the melting point is less than 40 DEG C; the low-viscosity solvent comprises at least one of glycol dimethyl ether, diethylene glycol dimethyl ether, ethylene glycol methyl ether, 1,3-dioxolame, tetrahydrofuran, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate and propyl propionate; and the viscosity of the low-viscosity solvent is less than 1mPa.s. The invention further relates to the primary lithium battery. The non-aqueous electrolyte of the primary lithium battery provided by the invention has the advantages of high safety performance, good high-temperature storage performance and low-temperature discharge performance.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a nonaqueous electrolyte solution for a primary lithium battery and a primary lithium battery. Background technique [0002] Primary lithium batteries have the advantages of high capacity, extremely low self-discharge rate, moderate discharge level and long storage life, so their market demand continues to increase, and they are gradually replacing traditional alkaline manganese, zinc silver oxide and other disposable batteries. [0003] However, the safety issues of primary lithium batteries have always been an important issue of application concern. In particular, the electrolyte used in primary lithium batteries currently contains a large amount of flammable ethers, and some use combustible lithium perchlorate as lithium salt. When the battery is short-circuited, impacted, heated, etc., the battery is likely to explode. burning, causing unsafe accidents. [0004] In order ...

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Problems solved by technology

[0003] However, the safety issue of primary lithium batteries has always been an important issue of application concern

Although the above-mentioned patents disclose the use of low-viscosity solvents in electrolytes, the disclosed low-viscosity solvents are used to improve battery capacity and cycle performance, and do not have the technical effect of improving battery safety performance

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