Electrical resistances of soldered battery cell connections

Brand, Martin J.; Kolp, Elisabeth I.; Berg, Philipp; Bach, Tobias; Schmidt, Philipp; Jossen, Andreas

doi:10.1016/j.est.2017.03.019

Cited by 44 publications

(50 citation statements)

References 7 publications

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“…[ 12 ] Thus, additional contact formation steps are necessary for the conventional FTCEs. Conventional contact formation methods include the use of soldering, [ 13 ] conductive adhesives, [ 11b ] or mechanical clamper. [ 14 ] Alternatively, conductive metal electrodes can be formed directly on the specific active regions of flexible devices using vacuum evaporation [ 15 ] or solution coating.…”

Section: Introductionmentioning

confidence: 99%

“…For example, it is challenging to form an accurate, thin contact with soldering because of the viscous fluid nature of the solder paste. [ 13,17 ] Moreover, solder pastes are not transparent, which limits their utilization in specific regions of flexible transparent devices. [ 13 ] The mechanical fixation using a sprung metal clip is typically bulky and is not suitable for thin, flexible devices.…”

Section: Introductionmentioning

confidence: 99%

“…[ 13,17 ] Moreover, solder pastes are not transparent, which limits their utilization in specific regions of flexible transparent devices. [ 13 ] The mechanical fixation using a sprung metal clip is typically bulky and is not suitable for thin, flexible devices. In addition, the mechanical clamping can damage the surface physically.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Low‐Resistant Electrical and Robust Mechanical Contacts of Self‐Attachable Flexible Transparent Electrodes with Patternable Circuits

Hwang

Seong

et al. 2020

Adv Funct Materials

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Flexible, transparent, conductive electrodes are key elements of emerging flexible electronic and energy devices. Such electrodes should form an intimate physical contact with various active components of flexible devices to ensure stable, low-resistant electrical contacts. However, contact formation techniques are based largely on conventional soldering, conductive pastes, mechanical clamping, and thin film deposition. These generally result in damaged, contaminated, bulky, and uncontrollable contact interfaces. A self-attachable, flexible, transparent, and conductive electrode that is based on a distinctive design of regular grid patterns into which bioinspired adhesive architectures and percolating Ag nanowires are integrated is proposed. Based on this integrated design, the proposed electrode forms reliable, low-resistant electrical contacts; strong mechanical adhesive contacts; and ultra-clean, damage-free contact interfaces with active device components by attaching onto the components without using additional conductive pastes, mechanical pressing, or vacuum deposition processes. The contact interfaces of the electrode and device components remain stable even when the electrode is extremely bent. Moreover, specific electronic circuits can be generated on the electrode surface by a selective deposition of Ag nanowires. This enables simple interconnections of diverse electronic components on its surface.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Low‐Resistant Electrical and Robust Mechanical Contacts of Self‐Attachable Flexible Transparent Electrodes with Patternable Circuits

Hwang

Seong

et al. 2020

Adv Funct Materials

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“…Steel connectors are attached to the aluminum tabs with a spot-welding technique. Laser welding for aluminum-to-aluminum interconnection is also being investigated to compare the contact resistance and tensile force capabilities [12]. Cells are placed inside a temperature chamber to preserve 25 • C and they are connected to the PEC ACT0550 tester, capable of up to DC 5 V measurements with a ±0.005% accuracy.…”

Section: Test Bench Descriptionmentioning

confidence: 99%

Comparative Study on Parameter Identification Methods for Dual-Polarization Lithium-Ion Equivalent Circuit Model

et al. 2019

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Md.Sazzad.Hosen@vub.be (M.S.H.); Mohsen.Akbarzadeh.Sokkeh@vub.be (M.A.S.); Shovon.Goutam@vub.be (S.G); Joris.Jaguemont@vub.be (J.J.); Maitane.Berecibar@vub.be (M.B.); Joeri.van.mierlo@vub.be (J.V.M.) 2 Flanders Make,Abstract: A lithium-ion battery cell's electrochemical performance can be obtained through a series of standardized experiments, and the optimal operation and monitoring is performed when a model of the Li-ions is generated and adopted. With discrete-time parameter identification processes, the electrical circuit models (ECM) of the cells are derived. Over their wide range, the dual-polarization (DP) ECM is proposed to characterize two prismatic cells with different anode electrodes. In most of the studies on battery modeling, attention is paid to the accuracy comparison of the various ECMs, usually for a certain Li-ion, whereas the parameter identification methods of the ECMs are rarely compared. Hence in this work, three different approaches are performed for a certain temperature throughout the whole SoC range of the cells for two different load profiles, suitable for light-and heavy-duty electromotive applications. Analytical equations, least-square-based methods, and heuristic algorithms used for model parameterization are compared in terms of voltage accuracy, robustness, and computational time. The influence of the ECMs' parameter variation on the voltage root mean square error (RMSE) is assessed as well with impedance spectroscopy in terms of Ohmic, internal, and total resistance comparisons. Li-ion cells are thoroughly electrically characterized and the following conclusions are drawn: (1) All methods are suitable for the modeling, giving a good agreement with the experimental data with less than 3% max voltage relative error and 30 mV RMSE in most cases. (2) Particle swarm optimization (PSO) method is the best trade-off in terms of computational time, accuracy, and robustness. (3) Genetic algorithm (GA) lack of computational time compared to PSO and LS (4) The internal resistance behavior, investigated for the PSO, showed a positive correlation to the voltage error, depending on the chemistry and loading profile.

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“…For example, Das, et al [2] have identified the suitable joining methods for cylindrical cell based battery pack building of which laser welding, micro-TIG welding and ultrasonic wedge bonding are the preferred joining methods. As dissimilar thin material joining is one of the key requirements for battery joining applications, several joining techniques are adopted to make satisfactory dissimilar interconnects, including ultrasonic metal welding [4], [5], ultrasonic wedge bonding [6], resistance spot welding [7], [8], soldering [9], micro-TIG welding [7], [10], micro-clinching [11] or laser welding [12]. Among these joining methods, laser welding provides several advantages over other joining methods including easy automation, contactless one-sided joining, high throughput, less heat input etc.…”

Section: Introductionmentioning

confidence: 99%

Electro-Thermo-Mechanical Behaviours of Laser Joints for Electric Vehicle Battery Interconnects

Shaikh

Das

Barai

et al. 2019

2019 Electric Vehicles International Conference (EV)

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Electrical resistances of soldered battery cell connections

Cited by 44 publications

References 7 publications

Low‐Resistant Electrical and Robust Mechanical Contacts of Self‐Attachable Flexible Transparent Electrodes with Patternable Circuits

Low‐Resistant Electrical and Robust Mechanical Contacts of Self‐Attachable Flexible Transparent Electrodes with Patternable Circuits

Comparative Study on Parameter Identification Methods for Dual-Polarization Lithium-Ion Equivalent Circuit Model

Electro-Thermo-Mechanical Behaviours of Laser Joints for Electric Vehicle Battery Interconnects

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