Investigating electrical contact resistance losses in lithium-ion battery assemblies for hybrid and electric vehicles

2011 ◽  
Vol 196 (15) ◽  
pp. 6525-6533 ◽  
Author(s):  
Peyman Taheri ◽  
Scott Hsieh ◽  
Majid Bahrami
Keyword(s):  
Contact Resistance ◽  
Lithium Ion Battery ◽  
Electric Vehicles ◽  
Electrical Contact ◽  
Lithium Ion ◽  
Electrical Contact Resistance

Effects of Electrical Contact Resistance on External Energy Losses in Lithium-Ion Battery Packs for Hybrid and Electric Vehicles

2011 ◽  
Author(s):  
Peyman Taheri ◽  
Scott Hsieh ◽  
Majid Bahrami
Keyword(s):  
Energy Loss ◽  
Contact Resistance ◽  
Electric Vehicles ◽  
Electrical Contact ◽  
Lithium Ion ◽  
Direct Result ◽  
Li Ion Batteries ◽  
Li Ion Battery ◽  
Electrical Contact Resistance ◽  
Li Ion

Lithium-ion (Li-ion) batteries are favored in hybrid-electric vehicles and electric vehicles for their outstanding power characteristics. In this paper the energy loss due to electrical contact resistance (ECR) at the interface of electrodes and current-collector bars in Li-ion battery assemblies is investigated for the first time. ECR is a direct result of contact surface imperfections and acts as an ohmic resistance at the electrode-collector joints. ECR is measured at electrode connections of a sample Li-ion battery, and a straightforward analysis is presented to evaluate the relevant energy loss. Through the experiments, it is observed that ECR is an important issue in energy management of Li-ion batteries. Effects of surface imperfection, contact pressure, joint type, collector bar material, and interfacial materials on ECR are highlighted. The obtained data show that in the considered battery, the energy loss due to ECR can be as high as 20% of the total energy flow in and out of the battery under normal operating conditions. However, ECR loss can be reduced to 6% when proper joint pressure and/or surface treatment are used. A poor connection at the electrode-collector interface can lead to a significant battery energy loss as heat generated at the interface. At sever conditions, heat generation due to ECR might cause serious safety issues, thermal runaway, sparks, and even melting of the electrodes.

Failure mechanism in fiber-shaped electrodes for lithium-ion batteries

2015 ◽  
Vol 3 (20) ◽  
pp. 10942-10948 ◽  
Author(s):  
Wei Weng ◽  
Qingqing Wu ◽  
Qian Sun ◽  
Xin Fang ◽  
Guozhen Guan ◽  
...  
Keyword(s):  
Contact Resistance ◽  
Failure Mechanism ◽  
Electrical Contact ◽  
Active Material ◽  
Lithium Ion ◽  
Current Collector ◽  
Conductive Network ◽  
Electrical Contact Resistance ◽  
Loss Of Contact ◽  
First Time

Failure mechanism is investigated for the first time in a Si-based fiber-shaped electrode. The interphase electrical contact resistance indicates the dominant failure mechanism, which is the loss of contact between the current collector/conductive network and the active material. The decreasing contact resistance denotes the loose interphase contact and a decreasing capacity.

scholarly journals An Artificial Potential Field-Based Lithium-ion Battery SOC Equilibrium Method in Electric Vehicles

2020 ◽  
Vol 53 (2) ◽  
pp. 12682-12687
Author(s):  
Fu Jiang ◽  
Cheng Jin ◽  
Hongtao Liao ◽  
Heng Li ◽  
Yue Wu ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Electric Vehicles ◽  
Potential Field ◽  
Lithium Ion ◽  
Artificial Potential Field ◽  
Equilibrium Method

scholarly journals Characterization of the Compressive Load on a Lithium-Ion Battery for Electric Vehicle Application

Machines ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 71
Author(s):  
Seyed Saeed Madani ◽  
Erik Schaltz ◽  
Søren Knudsen Kær
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Electric Vehicles ◽  
Large Scale ◽  
Electrochemical Impedance ◽  
Applied Pressure ◽  
Lithium Ion ◽  
Battery Cells

Lithium-ion batteries are being implemented in different large-scale applications, including aerospace and electric vehicles. For these utilizations, it is essential to improve battery cells with a great life cycle because a battery substitute is costly. For their implementation in real applications, lithium-ion battery cells undergo extension during the course of discharging and charging. To avoid disconnection among battery pack ingredients and deformity during cycling, compacting force is exerted to battery packs in electric vehicles. This research used a mechanical design feature that can address these issues. This investigation exhibits a comprehensive description of the experimental setup that can be used for battery testing under pressure to consider lithium-ion batteries’ safety, which could be employed in electrified transportation. Besides, this investigation strives to demonstrate how exterior force affects a lithium-ion battery cell’s performance and behavior corresponding to static exterior force by monitoring the applied pressure at the dissimilar state of charge. Electrochemical impedance spectroscopy was used as the primary technique for this research. It was concluded that the profiles of the achieved spectrums from the experiments seem entirely dissimilar in comparison with the cases without external pressure. By employing electrochemical impedance spectroscopy, it was noticed that the pure ohmic resistance, which is related to ion transport resistance of the separator, could substantially result in the corresponding resistance increase.

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