Method and device for monitoring battery health status based on ultrasound

Abstract

The invention discloses a method and device for monitoring the state of health of a battery based on ultrasound, which belongs to the field of lithium-ion batteries. First, a triangular prism is arranged on two opposite sides of the battery to be detected, and an ultrasonic emission transmitter is respectively arranged on the triangular prism. , the receiving probe, the ultrasonic receiving and transmitting probes are parallel to each other, then the ultrasonic transmitting probe transmits the ultrasonic pulse signal of the set frequency, and the ultrasonic receiving probe moving at a uniform speed on the other side receives the ultrasonic signals penetrating at different positions, and then, the The position of the ultrasonic transmitting probe is the origin, collect the distance away from the origin and the peak intensity value of the transmitted ultrasonic wave at this distance, draw the two-dimensional distribution curve of the distance-peak intensity value, and determine the distance L corresponding to 1 / 2 peak intensity according to the curve , so as to monitor the health status of the battery to be detected. The invention also discloses a device for realizing the above method. The method and device of the invention can quickly and accurately monitor the health state of the lithium ion battery.

Description

technical field [0001] The invention belongs to the field of lithium batteries, and more particularly relates to an ultrasound-based method and device for monitoring the state of health of batteries. Background technique [0002] Lithium-ion batteries will experience varying degrees of aging and attenuation during use. The amount of output power and storage capacity that lithium-ion batteries can provide will gradually decrease with the aging of the battery. If the battery with too low life cannot be removed in time, it will cause the battery system to fail. It is of great significance to improve the utilization rate and avoid battery system failure. [0003] However, the prediction process of the health state of lithium-ion batteries is very complicated, even if the batteries of the same brand and the same batch of models leave the factory, their health states are different. At present, the health status of the battery is mainly detected by establishing a simulation syste...

AI Technical Summary

Problems solved by technology

[0005] In view of the defects of the prior art, the object of the present invention is to provide a method and device for monitoring the state of health of the battery based on ultrasound, aiming at solving the problems of long time consumption and large measurement errors in the detection of the state of health of the battery in the prior art. question

Images