Diagnostic apparatus, diagnostic method, and non-transitory computer-readable recording medium storing diagnostic instructions

• Main Authors: YOSHITAKE SATOSHI, KAZUMI MASAHIRO, AKABORI KOJI
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TESTING

The present disclosure provides a diagnostic apparatus including a calculator that calculates a value related to a capacity of a battery cell based on a comparison result between a measured Q-V curve indicating a relationship between a voltage obtained from measurement data of the battery cell and an integrated current amount and a reference Q-V curve. The calculator also calculates a capacity fading amount caused by a voltage difference between the measured Q-V curve and a reference Q-V curve by multiplying a slope of the measured Q-V curve by the voltage difference, and calculates a temporary maximum capacity after capacity fading caused by a change in the slope of the measured Q-V curve with respect to a slope of the reference Q-V curve. 本公开提供了一种诊断设备，该诊断设备包括计算器，该计算器基于测量Q-V曲线与参考Q-V曲线之间的比较结果来计算与电池单元的容量相关的值，测量Q-V曲线指示从电池单元的测量数据获得的电压和积分电流量之间的关系。计算器还通过将测量Q-V曲线的斜率乘以测量Q-V曲线与参考Q-V曲线之间的电压差，计算由该电压差引起的容量衰退量，并且计算在由测量Q-V曲线的斜率相对于参考Q-V曲线的斜率的变化引起的容量衰退之后的临时最大容量。