Direct-current internal resistance prediction method and device for lithium iron phosphate battery

• Main Authors: PENG MINGXIA, WU MENGYUN, ZHU ZHONGSI, MA SITIAN
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2024
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention belongs to the technical field of battery detection, and discloses a direct-current internal resistance prediction method and device for a lithium iron phosphate battery, a target capacitance function and a target temperature function can be respectively determined through part of test parameters, so that a target function conforming to a semi-empirical formula is obtained by using less experimental data and experimental cost, and the performance of the lithium iron phosphate battery is improved. The target DC internal resistance under different capacitance parameters and different temperature parameters can be calculated by combining the initial DC internal resistance under the initial temperature parameter and the initial capacitance parameter, so that the detection efficiency of the DC internal resistance of the lithium iron phosphate battery under full temperature or full battery capacity can be effectively improved while the test cost is saved. 本申请属于电池检测技术领域，公开了一种用于磷酸铁锂电池的直流内阻预测方法及装置，通过部分测试