Use of ultrasound for estimating state of charge and state of health in lithium-ion batteries.

当电池经历充放电循环时，锂离子在阳极和阴极层之间转移，导致电池的密度分布发生变化。这项工作的目的是研究使用超声波来跟踪密度的这些变化，目的是获得可用于电池管理系统的充电状态和健康信息。短暂的。利用超声波改变密度分布已被证明是先前文献中的一个概念，并已成功地在初步测试中重现。这项工作的一个特殊目的是从对超声波脉冲的响应中获得尽可能多的信息，以便收集样品有可能提供有用的电池诊断信息。不管细胞的历史、制造和状况如何。这项工作的一部分是探索电极在老化过程中表面纹理的变化。这可以提供电池接受充电能力的关键健康状态信息。电池管理系统是当前研究的一个大而多样的领域。超声波在这个领域中是一个相对较小的领域。这项技术的好处是由于超声探测的非侵入性和非破坏性。使用该方法可以获得封闭细胞的信息，为分析提供实时数据。目前的电池管理大多是基于估计技术，因此，需要寻找更准确的方法。电池在电动汽车和航空航天等高功率应用中越来越受欢迎。这就要求电池的安全使用，准确的电池管理系统对于安全高效的使用至关重要。

As a battery goes through charge and discharge cycles, lithium-ions are transferred between the anode and cathode layers causing a change the density distribution of the cell. The aim of this work is to look into the use of ultrasound to track these changes in density with the intention of gaining state of charge and state of charge of health information that could be utilised in a battery management system. Briefly. Change in density distribution using ultrasound has been proven to work as a concept in literature previously and has been successfully recreated in preliminary tests. A particular aim of this work is to gain as much information as possible from responses to ultrasound pulses such that a collection of samples have the possibility of providing useful battery diagnostic information. Regardless of the history, manufacture and condition of the cell. Part of this work is to explore the changing of surface texture in the electrodes as they age. This could provide critical state of health information with the batteries ability to accept charge. Battery management systems are a large and varied area of current research. Ultrasound is a relatively small area within this field. The benefits of this technique are due to the non-invasive and non-destructive nature of ultrasound explorations. Information about a closed cell can be obtained using this method that can provide real time data for analysis. Much of the current state of battery management is based on estimation techniques and as such, more accurate methods are sought.Batteries are becoming more popular in high power applications such as electrical vehicles and aerospace applications. This demands the safe use of batteries and accurate battery management systems become critical for safe and efficient usage.