Can EV batteries be inspected online?

To the best of the authors’ knowledge, the contributions of this article are as follows: A complete solution for the whole life cycle online inspection and fault detection of EV batteries is proposed, using the SOC, SOH algorithm and drive method for special scenario application described in the paper.

How to measure EV battery health?

As one of the important indicators of EV battery health, the current mainstream SOC estimation methods are as follows: (1) Discharge test method; (2) Current integration method; (3) Kalman filtering algorithm. Fig. 4. EV battery testing device . .

What is EV battery testing?

EV battery testing main terms EV power battery testing has three main elements, namely SOC, SOH and battery life prediction. The relationship between capacity loss L cal per d, the SOC and the temperature of the battery is shown for different temperatures in Fig. 1.

What are the main contents of EV battery testing?

The main contents of EV battery testing are SOC, SOH and battery remaining life prediction. For SOC, currently, the major manufacturers mainly apply the current integration method. For SOH, currently, the major manufacturers mainly apply the voltage curve fitting method.

What is Soh in EV battery?

SOH is a transient quantity that characterizes the ability of a battery to store electrical energy and energy relative to a new battery and is an indicator that quantitatively describes the performance state of the battery. Fig. 1. EV battery SOC curve .

How do major manufacturers predict battery remaining life?

For SOC, currently, the major manufacturers mainly apply the current integration method. For SOH, currently, the major manufacturers mainly apply the voltage curve fitting method. For battery remaining life prediction, currently, the major manufacturers mainly apply statistical patterns based on long-term data to estimate.