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

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 time 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. And the target direct current internal resistance under different capacitance and different pulse time can be calculated by combining the initial time parameter and the initial direct current internal resistance under the initial capacitance parameter, so that the detection efficiency of the direct current internal resistance of the lithium iron phosphate battery under the full pulse time or the 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