Battery Modelling and Simulation Using a Programmable Testing Equipment

Vergori, Elena; Mocera, Francesco; Somà, Aurelio

doi:10.3390/computers7020020

Cited by 35 publications

(26 citation statements)

References 54 publications

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“…Safety and batteries performance have been analysed through modelling and experimental tests in the last decades [4,5]. Progressive damage with charge/discharge cycles is the major weak point of lithium ion cells, since it affects the lifetime considerably [6].…”

Section: Introductionmentioning

confidence: 99%

Analytical Solution for Coupled Diffusion Induced Stress Model for Lithium-Ion Battery

2020

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Electric cycling is one of the major damage sources in lithium-ion batteries and extensive work has been produced to understand and to slow down this phenomenon. The damage is related to the insertion and extraction of lithium ions in the active material. These processes cause mechanical stresses which in turn generate crack propagation, material loss and pulverization of the active material. In this work, the principles of diffusion induced stress theory are applied to predict concentration and stress field in the active material particles. Coupled and uncoupled models are derived, depending on whether the effect of hydrostatic stress on concentration is considered or neglected. The analytical solution of the coupled model is proposed in this work, in addition to the analytical solution of the uncoupled model already described in the literature. The analytical solution is a faster and simpler way to deal with the problem which otherwise should be solved in a numerical way with finite difference method or a finite element model. The results of the coupled and uncoupled models for three different state of charge levels are compared assuming the physical parameters of anode and cathode active material. Finally, the effects of tensile and compressive stress are analysed.

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Section: Introductionmentioning

confidence: 99%

Analytical Solution for Coupled Diffusion Induced Stress Model for Lithium-Ion Battery

2020

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“…However, such an interesting solution is not directly applicable to the test of a typical battery pack used in E-scooters [8,12], because of the intrinsic power limits of the lab instrumentation employed. To overcome these power limits, an electronic load and a charger with improved power range are used to characterize a single Li-ion cell with higher capacity, 25 Ah and 40 Ah, respectively in [10] and [13].…”

Section: High-current Cell Tester Battery Test Systemsmentioning

confidence: 99%

“…As an example, the application software package BPChecker2000 limits the user to use it only with a specifically owned lab instrumentation [11], being the modification and the redistribution of the code to third-parties denied [14]. The National Instruments LabView software suite development platforms adopted in [10] and [13] allow the user to modify the source code of the LabVIEW application software or to realize a new one after the purchase of a temporary license [15].…”

Section: High-current Cell Tester Battery Test Systemsmentioning

confidence: 99%

“…Finally, the "control block" properly manages the units of the CST according to the test phase to be executed. The hardware framework explained so far is akin to a basic Li-ion cell experimental characterization equipment [10,23], except for the control unit. The control unit consists of a Personal Computer in all the testers described in the above-cited literature.…”

Section: Instrument Specificationmentioning

confidence: 99%

“…As indicated in [7] and shown in Table 1, the commercially available test equipment for Li-ion cells can be divided into three groups: electrochemical workstations that use high frequency and advanced analysis techniques on a single cell, such as Electrochemical Impedance Spectroscopy (EIS), but with a limited current and power range; high-current cell testers that cycle the single cell with a limited support for high frequency analysis, and finally high-current and high-voltage battery tester that can cycle a complete battery pack. Considering that a typical E-scooter engine power ranges from 200 W [2] up to some kilowatts [8], and considering that the measurement of the capacity of a cell usually consists of a current integration operation [9,10] that does not require complex high frequency analysis, the two last instrument categories would be the preferred choice for extracting the SoH of an LIB in this kind of application. However, the cost of such instruments seems too high to be affordable to mechanical workshops.…”

Section: Introductionmentioning

confidence: 99%

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Open and Flexible Li-ion Battery Tester Based on Python Language and Raspberry Pi

Carloni¹,

Baronti²,

Rienzo³

et al. 2018

Electronics

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Technology improvements and cost reduction allow electrochemical energy storage systems based on Lithium-ion cells to massively be used in medium-power applications, where the low system cost is the major constraint. Battery pack maintenance services are expected to be required more often in the future. For this reason, a low-cost instrumentation able to characterize the cells of a battery pack is needed. Several works use low-cost programmable units as Li-ion cell tester, but they are generally based on proprietary-software running on a personal computer. This work introduces an open-source software architecture based on Python language to control common low-cost commercial laboratory instruments. The Python software application is executed on a Raspberry Pi board, which represents the control block of the hardware architecture, instead of a personal computer. The good results obtained during the validation process demonstrate that the proposed cell station tester features measurement accuracy and precision suitable for the characterization of Li-ion cells. Finally, as a simple example of application, the state of health of twenty 40 Ah LiFePO4 cells belonging to a battery pack used in an E-scooter was successfully determined.

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Commercialization of Lithium Battery Technologies for Electric Vehicles

Zeng

El‐Hady

et al. 2019

Advanced Energy Materials

1,109

555

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The currently commercialized lithium-ion batteries have allowed for the creation of practical electric vehicles, simultaneously satisfying many stringent milestones in energy density, lifetime, safety, power, and cost requirements of the electric vehicle economy. The next wave of consumer electric vehicles is just around the corner. Although widely adopted in the vehicle market, lithium-ion batteries still require further development to sustain their dominating roles among competitors. In this review, the authors survey the state-of-the-art active electrode materials and cell chemistries for automotive batteries. The performance, production, and cost are included. The advances and challenges in the lithium-ion battery economy from the material design to the cell and the battery packs fitting the rapid developing automotive market are discussed in detail. Also, new technologies of promising This article is protected by copyright. All rights reserved.2 battery chemistries are comprehensively evaluated for their potential to satisfy the targets of future electric vehicles.

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Battery Modelling and Simulation Using a Programmable Testing Equipment

Cited by 35 publications

References 54 publications

Analytical Solution for Coupled Diffusion Induced Stress Model for Lithium-Ion Battery

Analytical Solution for Coupled Diffusion Induced Stress Model for Lithium-Ion Battery

Open and Flexible Li-ion Battery Tester Based on Python Language and Raspberry Pi

Commercialization of Lithium Battery Technologies for Electric Vehicles

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