A secondary battery and an electronic device

By introducing cyclic sulfate compounds and fluorosulfonamide compounds into the electrolyte to form an interfacial film, and combining it with a pressure relief component, the problem of rapid thermal response of steel-cased lithium-ion batteries in thermal abuse tests was solved, thereby improving high-temperature cycling performance and hot box pass rate.

CN122417985APending Publication Date: 2026-07-17NINGDE AMPEREX TECHNOLOGY LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGDE AMPEREX TECHNOLOGY LTD
Filing Date
2025-12-24
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Steel-cased lithium-ion batteries exhibit rapid thermal response during thermal abuse testing, which can easily trigger internal thermal runaway chain reactions, deteriorating high-temperature cycling performance and thermal chamber pass rate.

Method used

By introducing specific amounts of cyclic sulfate compounds and fluorosulfonamide compounds into the electrolyte, a stable interfacial film is formed, and a pressure relief component with a specific pore area is set up to work synergistically to suppress side reactions and relieve pressure in a timely manner.

Benefits of technology

It effectively reduces the battery's heat accumulation temperature, improves high-temperature cycle performance and heat box throughput, and prevents casing deformation and short circuits.

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Abstract

本申请提供了一种二次电池及电子装置，属于储能技术领域。二次电池包括电解液和外壳；电解液包括环状硫酸酯类化合物和氟代磺酰胺化合物；基于电解液的总质量，环状硫酸酯类化合物和氟代磺酰胺化合物的质量含量分别为a%和b%，0.01≤a≤5，1≤b≤15；外壳包括壳体和泄压组件；壳体的材质为钢壳，泄压组件包括密封件和第一通孔；第一通孔的面积为c mm2，1≤c≤9；0.15≤(a+b) / c≤10。本申请通过上述设置，能够提高二次电池的高温循环性能和热箱通过率。
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