scispace - formally typeset
Search or ask a question

Answers from top 10 papers

More filters
Papers (10)Insight
Comprehension of open-circuitvoltage (OCV) function and battery impedance can be used to evaluate the residual energy and dynamic voltage response of lithium batteries.
Experimental results indicate that the open-circuit voltage of the lead-acid battery varies methodically with the charging or discharging rates and the duration since they have been disconnected from the load or charger.
This voltage enables a single battery cell operation.
The integrated model can predict accurately the terminal voltage, state of charge, battery capacity and gassing current.
This article presents an analytical model that relates the battery voltage to the battery current, thus facilitating system design optimizations with respect to the battery performance.
Proceedings ArticleDOI
Noshirwan K. Medora, A. Kusko 
01 Sep 2005
33 Citations
The results demonstrate that this model provides a reasonable representation of the battery terminal voltage for the different discharge conditions.
It is for the first time that such ahigh voltage is obtained from cow dung fed biomass battery.
Voltage is one of the parameters that must be controlled by the battery management system, so that the battery can be protected effectively.
The comparison of measured and simulated voltage profiles indicates an excellent performance of the battery model.

See what other people are reading

How does the use of lithium-ion batteries compare to other types of batteries for stationary energy storage?
5 answers
The use of lithium-ion batteries (LIBs) for stationary energy storage presents both advantages and challenges. LIBs are increasingly adopted for stationary applications due to their high efficiency and energy density. However, when comparing LIBs to other battery types like lead-acid batteries (LABs) and lithium-sulfur (Li-S) batteries, environmental impacts play a crucial role. Life cycle assessments (LCAs) reveal that LIBs have higher environmental impacts during production compared to LABs. On the other hand, Li-S batteries show promise in achieving high energy densities without rare metals, potentially offering environmental and resource advantages over LIBs. Despite these differences, LIBs remain dominant in stationary applications due to their efficiency, with newer plants showing higher efficiencies and minimal degradation over time.
What are the specific manufacturing standards that dictate the optimal temperature range for photovoltaic solar panels?
5 answers
The optimal temperature range for photovoltaic solar panels is governed by specific manufacturing standards such as IEC 61730-2 and ANSI/UL 1703. These standards provide procedures to determine the maximum reference temperatures of various components and materials of a PV module, ensuring safety and functionality requirements are met. Additionally, the International Electrotechnical Committee (IEC) has defined standard test conditions (STC) for PV modules, specifying 25°C module temperature as part of the testing criteria. Moreover, research has shown that the performance of PV panels can be significantly improved by reducing operating temperatures, with experimental studies demonstrating a 10°C temperature decrease leading to a 5% power improvement and better regulation of electrical output.
Is there a portable machine for testing lead (pb) in material?
5 answers
Yes, there are portable machines available for testing lead (Pb) in materials. One such device is the pMet-lead biosensor, which is a portable fluorescence resonance energy transfer (FRET)-based Pb biosensor designed for detecting Pb in environmental samples. Additionally, a portable testing device has been invented, featuring a main body with a lithium ion battery, leads connected to a charging battery pack, and the ability to test various parameters including resistance. These portable devices offer a convenient and efficient way to detect lead content in materials, providing rapid and accurate results while being environmentally friendly and cost-effective.
What the methods for fabrication of carbon coated silicon electrodes?
5 answers
The fabrication methods for carbon-coated silicon electrodes involve various techniques. One approach includes coating a current collector with a slurry containing silicon particles, polymeric binders, and carbon fibers, followed by pyrolyzing the coated collector at specific temperatures to produce the electrode with a silicon-based host material. Another method combines a lithium source, a silicon source, and an organic carbon source, undergoing pre-lithiation reactions and high-temperature calcination to obtain carbon-coated silicon-based negative electrode materials. Additionally, a technique involves etching a porous silicon film on a silicon wafer, followed by secondary etching, ultrasonic stripping, and coating with sugar alcohol to create carbon-coated porous silicon materials. These methods aim to enhance electrode performance by addressing issues like volume expansion, conductivity improvement, and cycle life enhancement.
What are the primary components of a generation station in the context of power systems?
4 answers
A power generation station typically consists of several key components. These include a combustor for generating a circulating fluid by burning fuel, an expander for converting the fluid's energy into power, a power generator for electricity production, a compressor for fluid compression, and a pump for circulation. Additionally, a displacement measuring part may be present to measure the movement of a generator's parts, along with a converter to adjust the electric power's voltage level based on this measurement. Furthermore, some systems utilize permanent magnets to generate rotational force for power generation without physical transmission structures, incorporating multiple power generators, an integrated substation for electricity distribution, and a control room for system management. Other configurations may involve waste heat circulating systems with shared evaporators and cooling agent control valves to optimize equipment utilization and prevent working oil loss.
What is ASIL?
5 answers
ASIL stands for Automotive Safety Integrity Level, which is a crucial aspect in ensuring the safety and reliability of automotive systems. ASIL is defined in the ISO 26262 standard, which outlines different levels of safety requirements for automotive applications based on their criticality. ASIL D, the highest level in the standard, signifies the most stringent safety integrity level for automotive systems. Achieving ASIL D compliance involves implementing high safety mechanisms with high failure detection rates, especially in hardware components used in applications requiring ASIL D support. ASIL decomposition is a technique recommended by ISO 26262 to decompose functions into independent components with lower safety requirements, helping to manage costs while meeting safety standards.
How does adaptive fuzzy PI control contribute to efficient regenerative braking in vehicles?
5 answers
Adaptive fuzzy PI control plays a crucial role in enhancing the efficiency of regenerative braking in vehicles. By independently adjusting to varying impedance network parameters, the adaptive fuzzy PI controller (AFPIC) ensures stable operation of the grid-tied inverter (GTI) during regenerative braking. This controller's ability to adapt to different impedance networks allows for improved stability margins under high network impedance conditions, which is challenging for traditional PI controllers due to their phase lag characteristics. Additionally, the AFPIC incorporates a correction method of series virtual impedance to enhance system stability by converting the inverter output impedance from resistance-capacitance to resistance-inductance, ultimately improving the system's stability margin and efficiency during regenerative braking.
What is MPPT?
5 answers
MPPT, which stands for Maximum Power Point Tracking, is a crucial technique in solar photovoltaic systems aimed at optimizing the efficiency of electricity generation from solar panels. MPPT algorithms work by continuously adjusting the operating conditions of the photovoltaic system to ensure that it operates at the point where maximum power output is achieved. These algorithms are essential for extracting the highest possible power from the solar array, especially under varying weather conditions like partial shading and rapid irradiance changes. The Perturb and Observe (P&O) method is a commonly used MPPT strategy due to its simplicity and effectiveness, serving as a foundation for more advanced techniques in MPPT systems. Overall, MPPT plays a vital role in enhancing the overall efficiency and performance of solar energy systems.
What is Battery degradation cost?
5 answers
Battery degradation cost refers to the expenses incurred due to the deterioration of a battery's performance over time. Factors such as usage patterns, state of health, and environmental conditions contribute to battery degradation, impacting its efficiency and lifespan. Various studies propose models and methodologies to assess and track battery degradation costs, especially in the context of energy storage systems like Battery Energy Storage Systems (BESSs). These models often involve complex calculations considering variables like charge/discharge cycles, battery load patterns, and state of charge (SOC) to estimate the economic loss associated with battery degradation. Understanding and managing battery degradation costs are crucial for optimizing battery operation in applications such as grid dispatch, electric vehicle interactions, and microgrid energy management.
What is battey over-discharge?
5 answers
Battery over-discharge refers to a situation where a battery's voltage drops below a critical level, leading to potential damage or safety hazards. Various methods and systems have been developed to address this issue. One approach involves warning users about over-discharge based on previous discharging processes and preset values. Another method limits discharging power when the battery's state of charge is low and monitors voltage and current values to prevent over-discharge. Additionally, an over-discharge recovery system enables the battery to recover by charging it after over-discharge, ensuring safety and reliability. Furthermore, a protection device automatically cuts off battery output if voltage levels are too high or low, preventing overheating and ensuring user safety during use. Overall, these systems aim to prevent battery damage and enhance safety by addressing over-discharge issues.
How long does CCS charger takes to full charge ev car battery ?
4 answers
A CCS (Combined Charging System) charger typically takes approximately 15-30 minutes to recharge an electric vehicle (EV) battery up to 80% State of Charge (SoC) using the fast-charging method. However, some common EVs may require three to four hours for a full charge depending on battery capacities. Rapid chargers can also replenish EV batteries to 80% charge within around 30 minutes, supporting the EV rollout. It is crucial to note that the efficiency and power draw of the charging process, as well as the effects on the local network, are factors to consider when using rapid chargers. Additionally, accurate estimation of the Remaining Charging Time (RCT) for EVs is challenging but essential for user experience, with proposed algorithms showing significant error rate improvements in charging stages.