From Cell to Battery System - Different Cell Formats  and their System Integration

Lensch-Franzen, Christian; Gohl, Marcus; Schmalz, Mareike; Doguer, Tahsin

doi:10.1007/s38313-020-0292-9

Cited by 14 publications

(6 citation statements)

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“…When considering a module containing cylindrical cells or prismatic can cells, the volume change is typically assumed to be contained by the can and deformation of the can is ignored, however, as engineers drive for robust designs, the volume change in these cells that has historically been ignored must be considered. [35][36][37][38][39] A variety of methods have been utilized to quantify the volume change and deformation of lithium-ion batteries during operation. Some of the more common methods are: dial indicators, [40][41][42][43][44][45][46] load cells, [47][48][49] internal optical fiber, [50][51][52] strain gauges, 53 and digital displacement transducers.…”

Section: List Of Symbolsmentioning

confidence: 99%

Quantifying Volume Change in Porous Electrodes via the Multi-Species, Multi-Reaction Model

Garrick

Fernández

Labaza

et al. 2023

J. Electrochem. Soc.

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Automotive manufacturers are working to improve individual cell and overall pack design by increasing their performance, durability, and range, while reducing cost; and active material volume change is one of the more complex aspects that needs to be considered during this process. As the time from initial design to manufacture of electric vehicles is decreased, design work that used to rely solely on testing needs to be supplemented or replaced by virtual methods. As electrochemical engineers drive battery and system design using model-based methods, the need for coupled electrochemical/mechanical models that take into account the active material change utilizing physics based or semi-empirical approaches is necessary. In this study, we illustrated the applicability of a mechano-electrochemical coupled modeling method considering the multi-species, multi-reaction model as popularized by Verbrugge and Baker. To do this, validation tests were conducted using a computer-controlled press apparatus that can control the press displacement and press force with precision. The coupled MSMR volume change model was developed and its applicability to graphite and NMC cells was illustrated. The increased accuracy of the model considering the coupled MSMR volume change approach shows in the importance of accounting for individual gallery volume change behavior on cell level predictions.

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Section: List Of Symbolsmentioning

confidence: 99%

Quantifying Volume Change in Porous Electrodes via the Multi-Species, Multi-Reaction Model

Garrick

Fernández

Labaza

et al. 2023

J. Electrochem. Soc.

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“…Often large-format cells No standardized cell size; Often large-format cells Most common: 18 650, 26 650, 4680 (Tesla); Often small-format cells Mechanical structure [24,25] Low mechanical stability; Thermal propagation is difficult to control due to often missing gassing vent High mechanical stability and stiffness; Flexible gassing vent positioning Highest mechanical stability; Robust to high internal pressures…”

Section: Pouch Cell Prismatic Cell Cylindrical Cellmentioning

confidence: 99%

“…Cell distance space is often used for PET foils, aluminum sheet metal with thermal conductive pastes, compression, or thermal pads for better performing cooling and expansion properties of the battery module. [24,30,32,33] Moreover, thinner cells often occur with easier thermal management. [34] Feng et al suggest thermal-resistant layers of 1 mm thickness for each 25 Ah pouch cells to prevent thermal runaway.…”

Section: Prismatic Cells Pouch Cellsmentioning

confidence: 99%

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Multiperspective Optimization of Cell and Module Dimensioning for Different Lithium‐Ion Cell Formats on Geometric and Generic Assumptions

Epp

Sauer

2022

Energy Tech

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Electric vehicles (EVs) are an essential part of bringing the mobility CO 2 emission to lower levels and ultimately reaching the Paris climate agreement. [1] In recent years, EVs received considerable attention leading to car manufacturers announcing new electric platforms and cars among all the different car classifications from A-to F-segment. Already, EVs achieve annual record sales for the past few years. [2][3][4] Yet, they are still relatively expensive, leading to different states subsidizing electrified cars to make them more attractive to customers. [5] One major reason for EVs being more expensive than the alternative combustion engine version is the still expensive battery system. Thus, the "e-version" of a car can cost up to 75% more of its combustion engine alternative, like the Opel Mokka and Mokka-e. [6] Although cell costs have massively decreased over the past years, the individual battery cell costs still play a significant role within the battery system's summarized cost. [4] As the lithium-ion battery (LIB) has been continuously improved over the last years, it is often already considered as a quite mature developed product. While improvements have mostly been made at the component level, huge cost reduction still lies in the system engineering process when integrating multiple cells in bigger applications like EVs. [7] In general, cell integration has to address a variety of challenges from mechanical, electrical, and thermal engineering. [8] Whereas high power and energy is still one of the

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“…When considering a battery pack design containing a different format, such as cylindrical cells or prismatic cells, the volume change has traditionally been assumed to be limited by the casing and ignored to a certain extent, however, as engineers seek to maximize the useful life of battery materials and increase energy density to mitigate range anxiety, the volume change over life must be considered. [61][62][63][64][65] Numerous methods have been utilized to quantify the volume change and deformation of lithium-ion battery cells during operation. Some of the more common methods include: dial indicators, [66][67][68][69][70][71][72] load cells, [73][74][75] internal optical fiber, [76][77][78] strain gauges, 44 and digital displacement transducers.…”

mentioning

confidence: 99%

Quantifying Aging-Induced Irreversible Volume Change of Porous Electrodes

Garrick,

Miao,

Macciomei

et al. 2023

J. Electrochem. Soc.

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Automotive manufacturers are working to improve cell and pack design by increasing their performance, durability, and range. One of the critical factors to consider as the industry moves towards materials with higher energy density is the ability to consider the irreversible volume change characteristic of the accelerated SEI layer growth tied to the large volume change and particle cracking typically associated with active material strain. As the time from initial design to manufacture of electric vehicle is decreased in order to rapidly respond to consumer demands and widespread adoption of electric vehicles, the ability to link aging and volume change to end of life vehicle requirements using virtual tools is critical. In this study, apply a mechano-electrochemical model to determine the irreversible volume change at the electrode and cell level, allowing for virtual design iterations to predict the volume change at battery cell aged states.

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From Cell to Battery System - Different Cell Formats and their System Integration

Cited by 14 publications

References 0 publications

Quantifying Volume Change in Porous Electrodes via the Multi-Species, Multi-Reaction Model

Quantifying Volume Change in Porous Electrodes via the Multi-Species, Multi-Reaction Model

Multiperspective Optimization of Cell and Module Dimensioning for Different Lithium‐Ion Cell Formats on Geometric and Generic Assumptions

Quantifying Aging-Induced Irreversible Volume Change of Porous Electrodes

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