文献类型：期刊文献

英文题名：Research on the Characteristics of Internal Short Circuits in Lithium-Ion Batteries Under Complex Condition: Nail Penetration Coupled with Charge/Discharge

作者：Ding, Yong Li, Wenda Wang, Linhui An, Zhoujian

第一作者：丁玥

通信作者：An, ZJ[1];An, ZJ[2]

机构：[1]Guizhou Inst Technol, Sch Aerosp Engn, Guiyang 550025, Peoples R China;[2]Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Aerosp Engn, Guiyang 550025, Peoples R China;corresponding author), Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China.|贵州理工学院;

年份：2026

卷号：12

期号：5

外文期刊名：BATTERIES-BASEL

收录：;Scopus(收录号：2-s2.0-105040203181);WOS:【SCI-EXPANDED(收录号:WOS:001776441700001)】；

基金：This work was financially supported by the Guizhou Provincial Major Scientific and Technological Program (XKBF(2025)031); the Guizhou Science and Technology Innovation Leading Talent Workstation (KXJZ(2025)024); the Guizhou Provincial Basic Research Program (Natural Science) (MS[2025]189; ZD[2026]076); the Academic New Seed Cultivation and Innovation Exploration Project (Guizhou Institute of Technology) [2024XSXM007] and the Scientific Start-up Project of GuiZhou Institute of Technology [2023GCC019].

语种：英文

外文关键词：lithium-ion battery; internal short circuit; nail penetration abuse; charge/discharge operation; "Li+ competition" effect

摘要：This study systematically investigates the internal short circuit (ISC) characteristics of lithium-ion batteries (LIBs) for electric vehicles under nail penetration abuse coupled with charge/discharge operations. By establishing a nail penetration coupled with dynamic charge/discharge experimental platform and using commercial NCM pouch cells as test subjects, it comprehensively analyzes the effects of different charge/discharge operations (charging, discharging, resting) and C-rates (0.2 C-3 C) on battery surface temperature, voltage, current, mass loss, and thermal runaway behavior. The research finds that a mutual inhibitory effect exists between discharge operation and ISC, manifested as reduced discharge current along with decreased surge current, temperature rise rate, and voltage drop, significantly lowering the battery's thermal runaway risk. In contrast, charging operation exacerbates ISC severity, causing increases in surge current, temperature rise rate, maximum temperature, and mass loss with higher C-rates, substantially enhancing thermal hazards. The study further reveals the underlying mechanisms: during discharge, a "Li+ competition" effect suppresses the short-circuit current, whereas during charging, the external power source and the battery jointly form the short-circuit current, intensifying heat generation. This research provides important experimental evidence and theoretical support for the thermal safety design and risk assessment of LIBs under operating conditions.