Journal of energy storage最新文献

Design and thermodynamic analysis of a coal-fired power plant coupled with liquid CO2 energy storage for wide-load operation 大负荷运行的液态CO2储能燃煤电厂设计与热力分析

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2026-04-20 Epub Date: 2026-03-11 DOI: 10.1016/j.est.2026.121434

Zhao-Ting Wang , Yong-An Chen , Meng-Jie Li , Ke-Ying Yao , Rong-Rong Zhai , Ya-Ling He

{"title":"Design and thermodynamic analysis of a coal-fired power plant coupled with liquid CO2 energy storage for wide-load operation","authors":"Zhao-Ting Wang , Yong-An Chen , Meng-Jie Li , Ke-Ying Yao , Rong-Rong Zhai , Ya-Ling He","doi":"10.1016/j.est.2026.121434","DOIUrl":"10.1016/j.est.2026.121434","url":null,"abstract":"<div><div>To address the increasing peak-shaving demands for thermal power under high renewable energy penetration, this study proposes a novel technical solution, specifically integrating Liquid Carbon Dioxide Energy Storage (LCES) with Coal-Fired Power Plant (CFPP) for deep peak regulation. Based on this concept, thermodynamic modeling of the integrated 660 MW supercritical CFPP and 100 MW LCES system was established. The optimal charging scheme was determined by maximizing heat storage power under zero grid output conditions, while the optimal discharging scheme was derived by maximizing equivalent round-trip efficiency. The proposed scheme further expands operational flexibility through cascaded heat exchange/storage technology while fully utilizing electricity charge/discharge capabilities of LCES. Results demonstrate that the optimized CFPP-LCES system achieves a 30% reduction in minimum output power, enabling 110 MW of thermal storage with zero power output for 4 h. Concurrently, the system increases maximum output power by 21.35% to 800.92 MW, also sustained for 4 h. The system achieves an equivalent round-trip efficiency of 71.15% and expands the adjustable generation range from 70% of rated capacity prior to integration to 121.35%, enabling wide-range regulation (0%–121.35% rated power). Exergy analysis indicates a total exergy destruction rate of 58.89% for this integrated CFPP-LCES system, with the LCES subsystem contributing merely 4.6%. The CFPP, particularly its boiler and condenser, is the primary focus for energy-saving optimization.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"155 ","pages":"Article 121434"},"PeriodicalIF":8.9,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Morphology engineering and cu atom coordinating toward high-performance supercapacitors 形态工程与cu原子配位迈向高性能超级电容器

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2026-04-20 Epub Date: 2026-03-09 DOI: 10.1016/j.est.2026.121441

Yucheng Chen , Tianle Ren , Wentao Hu , Chaohui Ruan , Zhubing Xiao

{"title":"Morphology engineering and cu atom coordinating toward high-performance supercapacitors","authors":"Yucheng Chen , Tianle Ren , Wentao Hu , Chaohui Ruan , Zhubing Xiao","doi":"10.1016/j.est.2026.121441","DOIUrl":"10.1016/j.est.2026.121441","url":null,"abstract":"<div><div>Supercapacitors have garnered widespread attention owing to their high-power density and long service life. Here, sea cucumber-like Cu atoms coordinated nitrogen-enriched carbon three-dimensional porous nanofibers that are firstly fabricated via a three-step strategy as supercapacitor electrodes. The hetero-dimensional structure not only confers rich pore structure for ion diffusion and electrochemically active site, but also provides a strategy for the synergistic transport between macrostructure and microsites to improve electrochemical stability. Moreover, the N-Cu coordination bond within the carbon matrixes is highly favorable for mitigating the accumulation of Cu atoms, thus improving the carrier transport of carbon skeleton and energy storage capacity. Theoretical calculations reveal that the introduction of copper atoms adjusts the local charge distribution and the conjugation effect formed in the nitrogen‑copper skeleton, thereby ameliorate the electrochemical performance. As a consequence, the specific capacitance of Cu-N-C increases from 261 to 526 F g<sup>−1</sup> at 1 A g<sup>−1</sup>, and the rate capacitance retention improves from 67% to 88% at current densities ranging from 1 to 10 A g<sup>−1</sup>. Practically, a fully solid-state flexible Cu-N-C symmetric supercapacitor achieves a high energy density of 51.52 Wh kg<sup>−1</sup> under a high-power density of 800 W kg<sup>−1</sup>, holding great promise for energy storage application.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"155 ","pages":"Article 121441"},"PeriodicalIF":8.9,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical impedance spectroscopy as a tool to study the aging of a carbon xerogel-based anode in sodium-ion batteries 电化学阻抗谱作为研究钠离子电池碳干凝胶基阳极老化的工具

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2026-04-20 Epub Date: 2026-03-06 DOI: 10.1016/j.est.2026.121427

Yoana Fernández-Pulido, Ignacio Cameán, Belén Lobato, Ana B. García

{"title":"Electrochemical impedance spectroscopy as a tool to study the aging of a carbon xerogel-based anode in sodium-ion batteries","authors":"Yoana Fernández-Pulido, Ignacio Cameán, Belén Lobato, Ana B. García","doi":"10.1016/j.est.2026.121427","DOIUrl":"10.1016/j.est.2026.121427","url":null,"abstract":"<div><div>The performance as anode in sodium-ion batteries of a carbon xerogel (CX-500) using NaPF<sub>6</sub> salt-based electrolytes with different carbonate solvent mixtures (EC:DEC, EC:DMC, EC:EMC) is investigated by prolonged galvanostatic cycling with the support of the Electrochemical Impedance Spectroscopy (EIS). To this end, the CX-500 semi-cell internal ohmic (flow of ions by the electrolyte, R<sub>s</sub>) and faradic (solid-electrolyte interface layer, R<sub>SEI</sub>; charge transfer at the electrode/electrolyte interface, R<sub>CT</sub>) resistances as well as the parameters associated with the diffusion processes of the Na<sup>+</sup> ions at the electrode/electrolyte interface and inside the electrode (Warburg coefficient, σ; diffusion coefficient, D) along cycling were calculated by this non-destructive technique. The long-term electrochemical stability of the carbon xerogel anode in sodium-ion batteries was found to be highly dependent on electrolyte composition. By comparing the evolution of the capacity and the EIS parameters of the CX-500 semi-cell during cycling, it can be inferred that the use of EC:EMC carbonate mixture in the electrolyte is the most suitable since the other mixtures, EC:DEC and EC:DMC, induce abrupt increases of the internal resistances, particularly as regards R<sub>SEI</sub> and R<sub>CT</sub>, whose increases are related to the loss of active area accessible to the electrolyte as a consequence of the continuous growth of the SEI layer, thus leading to a significant capacity fading as a consequence of electrode degradation. These findings establish quantitative relationships between solvent chemistry and electrochemical degradation mechanisms in hard carbon anodes, advancing mechanistic understanding of electrolyte design for sodium-ion battery optimization.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"155 ","pages":"Article 121427"},"PeriodicalIF":8.9,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic decision-making in electric vehicle battery closed-loop supply chain with a reward-penalty mechanism 基于奖罚机制的电动汽车电池闭环供应链动态决策

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2026-04-20 Epub Date: 2026-03-10 DOI: 10.1016/j.est.2026.121093

Hongfang Song , Xifan Li , Guijun Li , Junlin Chen

{"title":"Dynamic decision-making in electric vehicle battery closed-loop supply chain with a reward-penalty mechanism","authors":"Hongfang Song , Xifan Li , Guijun Li , Junlin Chen","doi":"10.1016/j.est.2026.121093","DOIUrl":"10.1016/j.est.2026.121093","url":null,"abstract":"<div><div>As environmental concerns grow, governments have introduced regulations for enterprises to manage the recycling of end-of-life products. This research investigates how closed-loop supply chain (CLSC) participants make decisions dynamically under a government-driven reward-penalty mechanism. Focusing on a CLSC for the manufacturer investing in the quality design of electric vehicle (EV) batteries, we propose three manufacturer-led Stackelberg game models, solved through differential game theory and Bellman theory. To boost profits, the manufacturer focuses on optimizing the retailer's and third-party recycler's decisions. Analyses reveal the following three intriguing insights: first, the manufacturer engaged in recycling achieves the highest CLSC value function and economic benefits, with recycling activities offering environmental advantages. Moreover, the manufacturer earns a higher reward when recycling waste EV batteries. However, there is no strong correlation between the quality of EV batteries and the reward or the recycling rate. Lastly, the policy has a positive impact on recycling activities, especially when the manufacturer manages the collection process. As the recycling rate stabilizes, reward-penalty intensity fluctuations fade, suggesting that government intervention is necessary to avoid excessive participation and avoidable expenses.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"155 ","pages":"Article 121093"},"PeriodicalIF":8.9,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Homogeneous epoxy resin/phytic acid gel-derived carbon composite and its high energy density for supercapacitor 均相环氧树脂/植酸凝胶衍生碳复合材料及其用于超级电容器的高能量密度

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2026-04-20 Epub Date: 2026-03-09 DOI: 10.1016/j.est.2026.121331

Haimin Ou, Yuansheng Li, Jianghang Song, Chunhua Zhao, Chongjun Zhao

{"title":"Homogeneous epoxy resin/phytic acid gel-derived carbon composite and its high energy density for supercapacitor","authors":"Haimin Ou, Yuansheng Li, Jianghang Song, Chunhua Zhao, Chongjun Zhao","doi":"10.1016/j.est.2026.121331","DOIUrl":"10.1016/j.est.2026.121331","url":null,"abstract":"<div><div>The composites of two or more metal oxides/sulfides have been prepared and widely used in energy storage including battery and supercapacitor. However, the composite of two activated carbon component is seldom involved. Moreover, those solid carbon sources block their contact with another carbon source and suppress the construction of rich interfaces between two components in carbon composite. In this work, an epoxy resin (EP)/phytic acid (PA) homogeneous gel is prepared by combining the solvation/de-solvation process at 80 °C and the gelation process at different temperatures (120 °C, 150 °C and 180 °C) so as to supply the rich interfaces between epoxy resin/phytic acid. Subsequently, hydrogen bond crosslinks of hydroxyl groups on the surface of the epoxy resin chains with the phosphate groups of liquid phytic acid as well as ester crosslinks are constructed. Lastly, uniform carbon composites with rich interfaces between the two components from EP and PA are acquired. The optimized activated carbon composite, i.e., AEPC-150 which is gelled at 150 °C possesses micropore-dominant porous structure and thus a high specific surface area of 1642 m<sup>2</sup> g<sup>−1</sup>. In addition, AEPC-150-based electrode exhibits a superior capacitance of 435.2 F g<sup>−1</sup> at 1 A g<sup>−1</sup>, in which a high pseudocapacitance domain of 37.2% at 5 mV s<sup>−1</sup> (vs. 15.6% for AEPC-120, 11.4% for AEPC-180). The symmetric supercapacitor (SSC) of AEPC-150//AEPC-150 delivers an outstanding energy density of 35.58 Wh kg<sup>−1</sup> at a power density of 150 W kg<sup>−1</sup>, and 20.83 Wh kg<sup>−1</sup> even at 3750 W kg<sup>−1</sup>.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"155 ","pages":"Article 121331"},"PeriodicalIF":8.9,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling external short circuit behaviours of fresh and degraded lithium-ion batteries 对新鲜和退化锂离子电池的外部短路行为进行建模

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2026-04-20 Epub Date: 2026-03-11 DOI: 10.1016/j.est.2026.121443

Yangjie Zhou , Katie Lukow , Mayur Prakash Bonkile , Billy Wu

{"title":"Modelling external short circuit behaviours of fresh and degraded lithium-ion batteries","authors":"Yangjie Zhou , Katie Lukow , Mayur Prakash Bonkile , Billy Wu","doi":"10.1016/j.est.2026.121443","DOIUrl":"10.1016/j.est.2026.121443","url":null,"abstract":"<div><div>Improving the safety characteristics of lithium-ion batteries is essential for mass adoption of the technology, with external short circuit (ESC) tests being one of the most common benchmarks. These tests are most commonly applied at beginning-of-life (BOL), however, significant knowledge gaps remain regarding how the physics of ESCs evolve with cell ageing. In this study, we simulate the ESC behaviour from BOL to 1000 full cycles. At BOL, we identify two regimes of behaviour for the ESC current, an initially high but rapidly decreasing current phase, and a lower quasi-steady state current phase. The initial phase is characterised by the low but emerging overpotential, whilst the latter phase is defined by depletion of lithium-ions in the cathode-domain electrolyte phase and diffusion limitations. When ESC initial conditions are varied across state-of-charge (SOC) and initial cell/ambient temperatures, higher SOC and initial cell/ambient temperatures both result in more severe ESC behaviour due to higher voltage driving forces and lower overpotentials respectively. As the cell is degraded in a solid-electrolyte interphase growth dominated regime, the increased cell resistance, reduces the severity of the ESC across all conditions, with the 2-phase ESC current behaviour suppressed due to the lower current. We map these behaviours across a range of conditions providing indicative safety maps and underpinning insight into ESC behaviour from BOL towards aged states.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"155 ","pages":"Article 121443"},"PeriodicalIF":8.9,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Harnessing phosphate mine waste rocks as filler in packed bed thermal energy storage systems for industrial decarbonization 利用磷矿废石作为填料在填料床热储系统中用于工业脱碳

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2026-04-20 Epub Date: 2026-03-10 DOI: 10.1016/j.est.2026.121412

Soukaina Hrifech , El Ghali Bennouna , Hicham Amar , Mostafa Benzaazoua

{"title":"Harnessing phosphate mine waste rocks as filler in packed bed thermal energy storage systems for industrial decarbonization","authors":"Soukaina Hrifech , El Ghali Bennouna , Hicham Amar , Mostafa Benzaazoua","doi":"10.1016/j.est.2026.121412","DOIUrl":"10.1016/j.est.2026.121412","url":null,"abstract":"<div><div>The integration of low-cost and sustainable materials into thermal energy storage (TES) systems is essential for improving energy efficiency and supporting decarbonization efforts in industrial sectors. This study investigates the potential of phosphate mine waste rocks (PMWR) dolomitic limestone (LIM), flint (FT), phosflint (PF), and silexite (SX) collected from the Gantour mining site (Ben Guerir, Morocco) as sensible TES materials, for industrial waste heat recovery and phosphate drying. The PMWR were subjected to comprehensive thermophysical, thermomechanical, and long-term thermal cycling analyses to assess their suitability for packed-bed systems in conjunction with concentrated solar power (CSP) or industrial cogeneration processes. The results indicate that LIM and FT exhibit the most favorable thermal properties, with high volumetric heat capacities at 500 °C (3.90 and 3.13 MJ/m<sup>3</sup>. K, respectively) and thermal conductivities at 25 °C (3.68 and 3.27 W/m. K). LIM demonstrated good thermal stability at temperatures up to 500 °C, while FT suffered from irreversible expansion and disintegration due to internal stresses caused by its quartz-rich structure. Both PF and SX showed mass losses attributed to silanol group transformations. However, SX's high porosity allowed it to tolerate temperatures up to 600 °C, whereas PF developed structural cracks above 500 °C. Despite its thermal stability, SX's low thermophysical performance limits its suitability as a TES material. Based on mass loss thresholds, structural integrity, and thermomechanical stability under cycling, the safe operating temperature limits were identified as 300 °C for FT, 400 °C for PF, 500 °C for LIM, and 600 °C for SX. These findings demonstrate the feasibility of repurposing mining waste as effective and sustainable TES materials, contributing to the development of cost-efficient thermal storage solutions for industrial energy systems.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"155 ","pages":"Article 121412"},"PeriodicalIF":8.9,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carbon-cement supercapacitor: A review of mechanism, influencing factors and application 碳水泥超级电容器：机理、影响因素及应用综述

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2026-04-20 Epub Date: 2026-03-07 DOI: 10.1016/j.est.2026.121391

Jiacheng Gu, Wuman Zhang, Shutao Wu, Chenguang Wang, Yabo Zhang, Jiayang Zhu, Yifan Dai

{"title":"Carbon-cement supercapacitor: A review of mechanism, influencing factors and application","authors":"Jiacheng Gu, Wuman Zhang, Shutao Wu, Chenguang Wang, Yabo Zhang, Jiayang Zhu, Yifan Dai","doi":"10.1016/j.est.2026.121391","DOIUrl":"10.1016/j.est.2026.121391","url":null,"abstract":"<div><div>The development of renewable energy can mitigate environmental and climate change issues. However, the inherent intermittency and instability of renewable energy sources result in an imbalance between energy supply and demand, highlighting the need for efficient and practical energy storage solutions. This paper reviews the research progress on carbon-cement supercapacitors (CCSs), which integrate structural functionality with energy storage capabilities. CCSs exhibit high power density, long service life, and environmentally friendly design, making them suitable for renewable energy storage and offering a comprehensive energy storage solution for both energy and civil engineering applications. This review systematically discusses the composition, structural design, energy storage mechanisms, and fundamental characteristics of CCSs. Furthermore, it examines the typical self-discharge behavior and its influencing factors, while also addressing its potential for renewable energy storage and applications. Despite the considerable promise of CCS, significant challenges must be overcome before its practical implementation.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"155 ","pages":"Article 121391"},"PeriodicalIF":8.9,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vehicle-to-grid capability and economic analysis of electric school buses under high-frequency trips through scheduling optimization 基于调度优化的电动校车高频出行下的车对网能力及经济性分析

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2026-04-20 Epub Date: 2026-03-10 DOI: 10.1016/j.est.2026.121365

Zhi Zheng , Jiaxu Li , Hongkun Li , Qiao Zhu , Weiqun Liu , Dawei Dong

{"title":"Vehicle-to-grid capability and economic analysis of electric school buses under high-frequency trips through scheduling optimization","authors":"Zhi Zheng , Jiaxu Li , Hongkun Li , Qiao Zhu , Weiqun Liu , Dawei Dong","doi":"10.1016/j.est.2026.121365","DOIUrl":"10.1016/j.est.2026.121365","url":null,"abstract":"<div><div>The Vehicle-to-Grid (V2G) integration of electric vehicles into microgrids is a promising mobile storage solution, with electric school buses (ESBs) offering enhanced reliability due to their predictable schedules. However, existing research lacks a scheduling optimization framework for discrete ESBs that undertake high-frequency inter-regional trips in daytime to explore V2G potential and economic impact. To address this, we innovatively propose a localized cluster-based ESB modeling approach, to enable the cluster-level control of distributed ESBs that frequently transition between on-grid and off-grid states, ensuring the precise and controllable management of V2G process. Building upon this, we develop a universal scheduling optimization strategy for fixed-mobile hybrid energy storage with the Whale Optimization Algorithm, to determine the economic operation of multi-microgrid system in multi-mode. Furthermore, we introduce a multi-dimensional analysis method for V2G capability evaluation and economic sensitivity analysis of ESBs. Case studies in both grid-connected and islanded modes demonstrate that: (1) a fleet of ESBs using the optimized strategy reduces system costs by 14.22% and 17.5% respectively compared to the non-V2G baseline, but greater dispersion in the initial ESB SOC and losses during within-station energy reallocation reduce the achievable cost savings; (2) the V2G capability of a single ESB and ESB module can reach 91.36 kWh and 678.36 kWh per day, respectively, and V2G capability is more sensitive to seasonal variations under islanded mode; (3) system economics are most sensitive to fleet size, followed by initial SOC, and least to round trip frequency.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"155 ","pages":"Article 121365"},"PeriodicalIF":8.9,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Consistency assessment for Lithium-ion battery energy storage systems based on low-rank matrix approximation and non-parametric Kullback-Leibler divergence 基于低秩矩阵近似和非参数Kullback-Leibler散度的锂离子电池储能系统一致性评估

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2026-04-20 Epub Date: 2026-03-07 DOI: 10.1016/j.est.2026.121390

Weijie Liu , Zhen Chen , Di Zhou , Ershun Pan

{"title":"Consistency assessment for Lithium-ion battery energy storage systems based on low-rank matrix approximation and non-parametric Kullback-Leibler divergence","authors":"Weijie Liu , Zhen Chen , Di Zhou , Ershun Pan","doi":"10.1016/j.est.2026.121390","DOIUrl":"10.1016/j.est.2026.121390","url":null,"abstract":"<div><div>Consistency is a critical factor that influences the energy efficiency and operational safety of lithium-ion battery energy storage systems (ESSs). Conducting consistency assessment is essential for ESSs. Specifically, evaluating the consistency levels of ESSs is crucial for their health management. Furthermore, it is necessary to locate inconsistent battery packs for subsequent equalization maintenance and replacement as consistency deteriorates. This paper proposes a general assessment framework for implementing consistency evaluation and inconsistency identification in ESSs. First, considering the high-dimensionality and sparsity of charge-discharge voltage cycle data, a consistency evaluation indicator for battery groups is developed based on the rank of the approximated low-rank matrix, which accounts for inherent heterogeneity and uncertainties. Then, inconsistency identification is performed by calculating the non-parametric Kullback-Leibler divergences between the voltage distributions of each monitored battery pack and the normal packs. Finally, an industrial application to a real-world energy storage power station is conducted to show the effectiveness and robustness of the proposed method. The obtained results demonstrate that the consistency levels of battery groups can be effectively evaluated and inconsistent battery packs can be accurately identified. The proposed consistency assessment framework meets the online application requirements of real-world battery management systems, thereby holding great potential for practical health management in ESSs.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"155 ","pages":"Article 121390"},"PeriodicalIF":8.9,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0