Aging of Samsung INR21700-50E Li-ion cells

<h3> Description of the project </h3>

All the data included in this repository has been also included in a new repository named "Aging and characterization of lithium-ion cells to develop a state-of-health diagnostic protocol" (https://doi.org/10.21950/GT4LKX), together with additional data, making this repository obsolete.<br>
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This experimental work is part of the "Work Package 4 - Diagnosis of Li-ion cells and modules" of the project "Research and development of a highly automated and safe streamlined process for increased Lithium-ion battery repurposing and recycling". Acronym: (REBELION). Project number: 101104241. Program: HORIZON-CL5-2022-D2-01-10, European Climate, Infrastructure and Environment Executive Agency (CINEA), European Commission.<br>
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The objective of the Work Package 4 is to develop a diagnostic protocol for Li-ion cells and modules, and a device implementing it that will allow distinguishing between those cells fitted for second life applications and those that have reached end of life and need to be disassembled for recycling of their components.<br>
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The purpose of this aging experiment is to obtain cells for use in the development of a diagnostic protocol for Li-ion cells. The cells under investigation are Samsung INR21700-50E cells.<br>

<h3> Description of the dataset </h3>

80 brand new Samsung INR21700-50E cells have been aged using different number of cycles and cycling strategies. Cell capacity has been measured before and after aging, and quasi-stationary OCV has been measured after aging. Cell voltage and current have been recorded during the aging process. In addition, the capacity and quasi-stationary OCV of 2 brand new Samsung INR21700-50E cells have been measured.<br>
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For each of the 80 aged cells, the dataset contains:
<ul>
<li> The capacity measurements obtained by Coulomb counting before and after aging.
<li> The data collected during the aging process.
<li> The quasi-stationary OCV measurements recorded after the aging.
</ul>
For each of the 2 brand new cells, the dataset contains:
<ul>
<li> The capacity measurement obtained by Coulomb counting.
<li> The quasi-stationary OCV measurements.
</ul>
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The 82 cells have been labelled using a combination of: their group number, the cycling strategy and A/B (cf. readme file for details). The repository consists of one directory per cell. The name of the directory corresponds to the label of the cell. Within these directories, the data is organized into directories as described below.<br>
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The 80 directories of the aged cells contain the following subdirectories:
<ul>
<li> The Capacity directory that contains two files, named CoulombCount_pre.xlsx and CoulombCount_post.xlsx, with the data of the Coulomb counts performed before and after the aging, respectively.
<li> The Cycles directory that contains the xlsx files generated by the cycler system during the cell aging.
<li> The pOCV directory that contains the three xlsx files generated during the three steps of the quasi-stationary OCV measurements: conditioning, and discharge and charge at C/48.
</ul>
The 2 directories of the brand new cells contain:
<ul>
<li> The Capacity directory that contains a file named CoulombCount.xlsx with the data of the Coulomb counting.
<li> The pOCV directory that contains the three files generated during the three steps of the quasi-stationary OCV measurements.
</ul>

<h3> 项目描述 </h3>
本实验工作隶属于缩写为REBELION的“用于提升锂离子电池（Lithium-ion battery）梯次利用与回收的高度自动化、安全高效流线型工艺研发”项目的“工作包4——锂离子电池单体与模组诊断”模块。该项目编号为101104241，由欧盟委员会欧洲气候、基础设施与环境执行署（CINEA）资助，属于HORIZON-CL5-2022-D2-01-10计划。<br><br>
工作包4的目标为开发锂离子电池单体与模组的诊断协议及配套实现装置，用以区分适用于梯次利用的电池与已达到退役状态、需拆解回收其组分的电池。<br><br>
本次老化测试实验的目的在于获取用于开发锂离子电池诊断协议的受试电池，本次研究的受试对象为三星INR21700-50E电池。<br><br>
<h3> 数据集描述 </h3>
本数据集包含80台全新三星INR21700-50E电池的老化测试数据，这些电池通过不同循环次数与循环策略完成老化流程。研究团队分别在老化前后测量了电池容量，并在老化结束后测量了其准静态开路电压（Open Circuit Voltage，OCV）；老化过程中同步记录了电池的电压与电流数据。此外，团队还测量了2台全新三星INR21700-50E电池的容量与准静态开路电压。<br><br>
针对80台老化电池，数据集包含以下内容：
<ul>
<li> 通过库仑计数法得到的老化前后容量测量数据；
<li> 老化过程中采集的循环测试数据；
<li> 老化后记录的准静态开路电压测量数据。
</ul>
针对2台全新电池，数据集包含以下内容：
<ul>
<li> 通过库仑计数法得到的容量测量数据；
<li> 准静态开路电压测量数据。
</ul>
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82台电池通过以下组合进行标签命名：组别编号、循环策略以及A/B标识（详细说明请参阅readme文件）。该数据集仓库以每台电池为单位建立独立目录，目录名称与对应电池的标签一致。目录内数据按如下结构组织：<br><br>
针对80台老化电池的目录，包含以下子目录：
<ul>
<li> 容量（Capacity）目录：内含两个Excel文件，分别为CoulombCount_pre.xlsx与CoulombCount_post.xlsx，分别存储老化前后的库仑计数测量数据；
<li> 循环（Cycles）目录：内含电池循环测试系统在电池老化过程中生成的全部Excel数据文件；
<li> 准静态开路电压（pOCV）目录：内含准静态开路电压三步测量流程生成的三个Excel文件，分别对应预处理、C/48倍率放电与充电流程的测量数据。
</ul>
针对2台全新电池的目录，包含以下内容：
<ul>
<li> 容量（Capacity）目录：内含名为CoulombCount.xlsx的Excel文件，存储库仑计数法得到的容量测量数据；
<li> 准静态开路电压（pOCV）目录：内含准静态开路电压三步测量流程生成的三个数据文件。
</ul>

搜集汇总

背景与挑战

背景概述

该数据集包含82个三星INR21700-50E锂离子电池的实验数据，其中80个经过不同老化处理，2个作为全新基准。数据集详细记录了电池老化前后的容量测量、循环过程数据和准静态开路电压(OCV)测量结果，数据以XLSX格式存储，是欧盟REBELION项目开发电池诊断协议的重要实验数据。