Introduction:
1.Background: The degradation of lithium batteries leads to safety and cost issues. Ultrasonic detection has the advantages of cost, size, and immediacy.
2.Detection: Under the control environment, the ultrasonic signal is actuated on each part of the battery, and the reflected or transmitted wave is collected.
3.Analysis: It has methods such as spectrum, image, and DL to evaluate the SoH, the distribution of degradation types, and the location of faulty cells in the battery module.
4.Theory: Use the acoustic properties of the battery with software simulation to verify the measured data.

Method:
1.Innovatively match probes with optimal function to improve the detection efficiency.
2.With detection all over the battery, the all physicochemical properties of the battery are presented.
3.Perform data correction before imaging, so that the inner information of the battery can be clearly presented.
4.Apply different temperatures and pressures during measurement to simulate different actual measurement environments.
5.Use DL analysis to greatly improve the accuracy of SoH evaluation.
6.Establish theory with software simulation and actual measurement results.

Advantages
1.This technology will be modularized and commercialized, and applied to electric vehicles, quickly presenting SoH, degradation range, type, and faulty cell location.
2.Instant SoH can improve power distribution, and replacing faulty batteries can avoid advanced damage to battery modules, so it can reduce electric vehicle operation and maintenance costs.
3.Real-time battery module health status can respond to battery failures before they lead to a crisis
4.This technology can be applied to all lithium battery electronics and power equipment.

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