1 INTRODUCTION. Concerns regarding oil dependence and environmental quality, stemming from the proliferation of diesel and petrol vehicles, have prompted a search for alternative energy resources [1, 2].In …
1 INTRODUCTION. Concerns regarding oil dependence and environmental quality, stemming from the proliferation of diesel and petrol vehicles, have prompted a search for alternative energy resources [1, 2] …
The present paper documents a comprehensive study on the ground impact of lithium-ion battery packs in electric vehicles. With the purpose of developing generic methodology, a …
In this paper, the grounding system of DC-grids is elaborated; the subject which significantly impacts the design and operation of the DC-grids.
Ground impact caused by road debris can result in very severe fire accident of Electric Vehicles (EV). In order to study the ground impact accidents, a Finite Element model of the battery pack structure is carefully set up according to the practical designs of EVs. Based on this model, the sequence of the deformation process is studied, and the ...
This study aims to investigate the impact of structural parameters on the temperature field of battery packs, with a focus on, the width of wedge-shaped channels, inclination angles, and gaps between battery cells. Through numerical simulation analysis and experimental validation, the results demonstrate that different structural parameters have a …
3. Equivalent circuit model. This high-voltage system connected to the insulation monitoring circuit can be modeled as an equivalent circuit, as illustrated in Figure 4, where V b is the voltage of the high-voltage battery pack, V a is the voltage of the two- or three-phase AC source or AC machine, the inverter/converter block is the power electronic circuit used to …
Purpose Battery electric vehicles (BEVs) have been widely publicized. Their driving performances depend mainly on lithium-ion batteries (LIBs). Research on this topic has been concerned with the battery pack''s integrative environmental burden based on battery components, functional unit settings during the production phase, and different electricity grids …
According to the different grounding modes of DC system, the paper analyzes the electrical characteristics of DC system pole to pole fault and ground fault respectively, and puts forward …
Severe plastic deformation is caused by the collision between road obstacles and the battery pack of electric vehicles, and it is one of the key factors of battery short circuit …
However my battery bank has never been damaged. I''ve recently switched to 48v lifepo4 battery banks (2 seperate systems) Obviously this has been a fair investment so trying to protect everything as much as possible. I''d be interested to know people''s thoughts on grounding batteries and why you should or shouldn''t?
Several high-quality reviews papers on battery safety have been recently published, covering topics such as cathode and anode materials, electrolyte, advanced safety batteries, and battery thermal runaway issues [32], [33], [34], [35] pared with other safety reviews, the aim of this review is to provide a complementary, comprehensive overview for a …
Vibrations on the battery pack due to shock and impact . because of which the BMS estimation algorithms have come to occupy considerable research space. Very few existing works have focussed on the impact of vibrations and mechanical abuse of the traction battery packs. Dynamic loading and vibrations of Li-Ion battery packs [18, 19] Battery safety analysis …
The present paper documents a comprehensive study on the ground impact of lithium-ion battery packs in electric vehicles. With the purpose of developing generic …
The design of a battery bank that satisfies specific demands and range requirements of electric vehicles requires a lot of attention. For the sizing, requirements covering the characteristics of ...
These include the DC–DC bidirectional converter, employed to step-up the voltage of the battery pack to that employed on the high voltage bus or DC link. The AC–DC converter (rectifier) employed to integrate the internal combustion engine (ICE) with the electrical architecture of the vehicle and finally the DC–AC converter (inverter) used to regulate the …
Impact of Discharge Current Pro les on Li-ion Battery Pack Degradation Maarten Appelman 1, Prasanth Venugopal, Gert Rietveld 1,2 1 University of Twente, Enschede, the Netherlands 2 VSL, Delft, the Netherlands m.b.appelman@utwente Abstract Increasing the life cycle of battery packs is one of the most valuable endeavors in modern Li- ion battery technologies, …
This article adopts the finite element analysis method to study the battery pack of electric vehicles, including the finite element model of the battery pack, dynamic state simulation, and bottom ball impact simulation [3] establishing a finite element model of the battery pack, stress and deformation in collisions can be simulated and predicted, thereby evaluating the …
In order to study the modeling of power battery packs and its impact on body performance, it was proposed to use the finite element method for modeling the power battery pack and analyzing its ...
The paper builds a unified equivalent modelling simulation system for electrochemical cells. In this paper, the short-circuit fault of DC bus in energy storage power station is analyzed and simulated.
To cover the gap, this paper introduces a complete set of functional characteristics of DC-grids, and accordingly, the impact of grounding systems on the …
The battery pack represents an essential part of electric vehicles (EV), so its design significantly influences the drive characteristics. The system of energy flow control in EV use high ...
The existing DC grounding strategies are introduced and their functional characteristics are reviewed in previous sections. According to the evaluations carried out in the former sections, the impact of each grounding strategy on the functional characteristics including CM voltage, stray current, fault detection, fault ride-through capability, and also fault …
DC fast chargers with 150 kW to 350 kW power that can recharge 80% of the battery in 15 to 30 minutes have been introduced in recent years. Current fast charging technologies are posing new challenges for Li-ion battery design, life and safety. To allow fast charging, battery suppliers must optimize cell chemistries, cell design and thermal …
Grounding of DC battery system enhances safety really because, if ungrounded, any short of power conductor to battery system would not be cleared by OCPD and personnel doing routine maintenance on the batteries are liable to be shocked or to suffer worse than that. Tony S Senior Member . Location Resting under the Major Oak UK. Jul 19, 2017 #7 …
Design and Operation Maintenance on DC Power System Ning Li1, Jincheng Yang1, Li Wang1, Dongdong Huang1, Xiaoyan Zhao2, Yidi Zhang2 1Xinjiang Institute of State Grid Electric Power Research, Wulumuqi, 830000, China. 2Yantai Power Supply Company of State Grid Shandong, Yantai 264000, China. Abstract. Based on specific products and actual projects, the DC …
The aging of lithium-ion batteries (LIBs) is a crucial issue and must be investigated. The aging rate of LIBs depends not only on the material and electrochemical performance but also on the working conditions. In order to assess the impact of vehicle driving conditions, including the driving cycle, ambient temperature, charging mode, and trip distance …
The increase of the resistance of the first battery pack after one month of testing is also related to the increased voltage unbalance of the battery pack [23], but this is beyond the scope of ...
Severe plastic deformation is caused by the collision between road obstacles and the battery pack of electric vehicles, and it is one of the key factors of battery short circuit failure. Based on a certain type of electric vehicle, an explicit dynamic analysis method is used to establish a vehicle system dynamic model, and the effectiveness of the model is verified …
This paper discusses the impact of photovoltaic (PV)-oriented dc stray current corrosion on large-scale solar farms'' grounding and third-party infrastructure. The dc stray current may result from a fault or may be facilitated by buried cables'' condition that allows dc leakage to flow into the earth. In particular, such abnormal conditions can impact the …
With a DC-coupled battery system, any generation that exceeds the power rating of the inverter can be immediately diverted into storage during periods of over-production. With an AC-coupled ...
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