Design Analysis of 26650 and 18650 LFP Cells for High Power and Low Temperature Use Cases
This study investigates the design and geometric properties of high-power and low-temperature 18650 and 26650 lithium iron phosphate (LFP) cells. The analysis focuses on the geometry and components’ thicknesses and deriving CAD models for both cell formats. Design variations were observed, even with...
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| Language: | English |
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MDPI AG
2025-01-01
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| Online Access: | https://www.mdpi.com/2313-0105/11/1/38 |
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| author | Florian Wätzold Anton Schlösser Max Leistikow Julia Kowal |
| author_facet | Florian Wätzold Anton Schlösser Max Leistikow Julia Kowal |
| author_sort | Florian Wätzold |
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| description | This study investigates the design and geometric properties of high-power and low-temperature 18650 and 26650 lithium iron phosphate (LFP) cells. The analysis focuses on the geometry and components’ thicknesses and deriving CAD models for both cell formats. Design variations were observed, even within cells from the same manufacturer. For instance, one manufacturer’s 26650 cell was not a scaled-up version of their 18650 cell, and no equivalence was found between the designs of high-power and low-temperature cells from the same manufacturer. Thus, modifications are not purely chemistry based. The results also reveal deviations from the literature values for jelly roll component thicknesses, with anode current collectors averaging 61 µm and cathode current collectors averaging 60 µm. Coating thicknesses varied, with anode coatings averaging 32 µm and cathode coatings averaging 52 µm. These variations in current collector and coating thicknesses suggest that both high-power and low-temperature LFP cell designs differ from the typical literature values. Furthermore, a trade-off was observed between low-temperature operation with two-tab designs and high pulse capability with limited minimum operating temperatures. Additionally, smaller particle sizes in anode coatings were associated with lower impedance. |
| format | Article |
| id | doaj-art-fd573424a03848f7bd8f77a061938ca0 |
| institution | Kabale University |
| issn | 2313-0105 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Batteries |
| spelling | doaj-art-fd573424a03848f7bd8f77a061938ca02025-01-24T13:22:30ZengMDPI AGBatteries2313-01052025-01-011113810.3390/batteries11010038Design Analysis of 26650 and 18650 LFP Cells for High Power and Low Temperature Use CasesFlorian Wätzold0Anton Schlösser1Max Leistikow2Julia Kowal3Electrical Energy Storage Technology, Technische Universität Berlin, Einsteinufer 11, 10587 Berlin, GermanyElectrical Energy Storage Technology, Technische Universität Berlin, Einsteinufer 11, 10587 Berlin, GermanyFaculty V Mechanical Engineering and Transport Systems, Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, GermanyElectrical Energy Storage Technology, Technische Universität Berlin, Einsteinufer 11, 10587 Berlin, GermanyThis study investigates the design and geometric properties of high-power and low-temperature 18650 and 26650 lithium iron phosphate (LFP) cells. The analysis focuses on the geometry and components’ thicknesses and deriving CAD models for both cell formats. Design variations were observed, even within cells from the same manufacturer. For instance, one manufacturer’s 26650 cell was not a scaled-up version of their 18650 cell, and no equivalence was found between the designs of high-power and low-temperature cells from the same manufacturer. Thus, modifications are not purely chemistry based. The results also reveal deviations from the literature values for jelly roll component thicknesses, with anode current collectors averaging 61 µm and cathode current collectors averaging 60 µm. Coating thicknesses varied, with anode coatings averaging 32 µm and cathode coatings averaging 52 µm. These variations in current collector and coating thicknesses suggest that both high-power and low-temperature LFP cell designs differ from the typical literature values. Furthermore, a trade-off was observed between low-temperature operation with two-tab designs and high pulse capability with limited minimum operating temperatures. Additionally, smaller particle sizes in anode coatings were associated with lower impedance.https://www.mdpi.com/2313-0105/11/1/38high-power LFP celllow-temperature LFP cellgeometrical analysis18650 CAD model26650 CAD model |
| spellingShingle | Florian Wätzold Anton Schlösser Max Leistikow Julia Kowal Design Analysis of 26650 and 18650 LFP Cells for High Power and Low Temperature Use Cases Batteries high-power LFP cell low-temperature LFP cell geometrical analysis 18650 CAD model 26650 CAD model |
| title | Design Analysis of 26650 and 18650 LFP Cells for High Power and Low Temperature Use Cases |
| title_full | Design Analysis of 26650 and 18650 LFP Cells for High Power and Low Temperature Use Cases |
| title_fullStr | Design Analysis of 26650 and 18650 LFP Cells for High Power and Low Temperature Use Cases |
| title_full_unstemmed | Design Analysis of 26650 and 18650 LFP Cells for High Power and Low Temperature Use Cases |
| title_short | Design Analysis of 26650 and 18650 LFP Cells for High Power and Low Temperature Use Cases |
| title_sort | design analysis of 26650 and 18650 lfp cells for high power and low temperature use cases |
| topic | high-power LFP cell low-temperature LFP cell geometrical analysis 18650 CAD model 26650 CAD model |
| url | https://www.mdpi.com/2313-0105/11/1/38 |
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