Multi-year field measurements of home storage systems and their use in capacity estimation

IF 49.7 1区材料科学 Q1 ENERGY & FUELS

Nature Energy Pub Date : 2024-09-16 DOI:10.1038/s41560-024-01620-9

Jan Figgener, Jonas van Ouwerkerk, David Haberschusz, Jakob Bors, Philipp Woerner, Marc Mennekes, Felix Hildenbrand, Christopher Hecht, Kai-Philipp Kairies, Oliver Wessels, Dirk Uwe Sauer

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Abstract

Home storage systems play an important role in the integration of residential photovoltaic systems and have recently experienced strong market growth worldwide. However, standardized methods for quantifying capacity fade during field operation are lacking, and therefore the European batteries regulation demands the development of reliable and transparent state of health estimations. Here we present real-world data from 21 privately operated lithium-ion systems in Germany, based on up to 8 years of high-resolution field measurements. We develop a scalable capacity estimation method based on the operational data and validate it through regular field capacity tests. The results show that systems lose about two to three percentage points of usable capacity per year on average. Our contribution includes the publication of an impactful dataset comprising approximately 106 system years, 14 billion data points and 146 gigabytes, aiming to address the shortage of public datasets in this field.

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家庭存储系统的多年实地测量及其在容量估算中的应用

家庭储能系统在住宅光伏系统集成中发挥着重要作用，最近在全球范围内经历了强劲的市场增长。然而，目前还缺乏量化现场运行期间容量衰减的标准化方法，因此欧洲电池法规要求开发可靠、透明的健康状况评估方法。在此，我们基于长达 8 年的高分辨率现场测量，展示了德国 21 个私人运营的锂离子系统的真实数据。我们根据运行数据开发了一种可扩展的容量估算方法，并通过定期的现场容量测试进行了验证。结果表明，系统平均每年损失约 2 到 3 个百分点的可用容量。我们的贡献包括发布了一个具有影响力的数据集，其中包括约 106 个系统年、140 亿个数据点和 146 千兆字节，旨在解决该领域公共数据集短缺的问题。

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来源期刊

Nature Energy Energy-Energy Engineering and Power Technology

CiteScore

75.10

自引率

1.10%

发文量

193

期刊介绍： Nature Energy is a monthly, online-only journal committed to showcasing the most impactful research on energy, covering everything from its generation and distribution to the societal implications of energy technologies and policies. With a focus on exploring all facets of the ongoing energy discourse, Nature Energy delves into topics such as energy generation, storage, distribution, management, and the societal impacts of energy technologies and policies. Emphasizing studies that push the boundaries of knowledge and contribute to the development of next-generation solutions, the journal serves as a platform for the exchange of ideas among stakeholders at the forefront of the energy sector. Maintaining the hallmark standards of the Nature brand, Nature Energy boasts a dedicated team of professional editors, a rigorous peer-review process, meticulous copy-editing and production, rapid publication times, and editorial independence. In addition to original research articles, Nature Energy also publishes a range of content types, including Comments, Perspectives, Reviews, News & Views, Features, and Correspondence, covering a diverse array of disciplines relevant to the field of energy.