本 发明 涉及金属‑硫族 电池 技术领域，具体而言，涉及用于金属‑硫族电池的微溶型 电解 液、金属‑硫族电池和用电设备。用于金属‑硫族电池的微溶型电解液包括摩尔比为0.2～5：0.05～25：1的主 溶剂 、共溶剂和 电解质 盐；主溶剂的 介电常数 ≥6；共溶剂的介电常数≤5。该微溶型电解液可以抑制多硫化物的溶解，从源头上解决多硫化锂的溶解和穿梭难题；能够降低溶剂与负极金属的副反应，避免电解液消耗、电池干液和负极金属的 腐蚀 和粉化；还可以显著降低电池的自放电现象，提高电池的储存性能

The present invention relates to the technical field of metal-sulfur batteries, and more specifically to microsoluble electrolytes for metal-sulfur batteries, metal-sulfur batteries, and electrical equipment. The microsoluble electrolyte for metal-sulfur batteries includes a main solvent, a co-solvent, and an electrolyte salt with a molar ratio of 0.2-5:0.05-25:1; the dielectric constant of the main solvent is ≥6; the dielectric constant of the co-solvent is ≤5; and the microsoluble electrolyte can inhibit the dissolution of polysulfides, solving the problem of dissolving and shuttling of lithium polysulfide at the source; reduce the side reaction between the solvent and the negative metal, and avoid the electrolysis of the electrolyte; and reduce the side reaction of the solvent with the negative metal, avoiding the electrolysis of the electrolyte. It can reduce the side reaction between the solvent and the negative metal, avoiding the consumption of electrolyte, the dry liquid of the battery and the corrosion and pulverization of the negative metal; it can also significantly reduce the self-discharge phenomenon of the battery and improve the storage performance of the battery.