scholarly journals Analysis of overcharging characteristics of a new type lithium iron phosphate battery for dc system of substation

2021 ◽  
Vol 248 ◽  
pp. 01066
Author(s):  
Liu Meijie ◽  
Gao Kai ◽  
Li Zhongwei ◽  
Qiu Peng ◽  
Meng Zhen
Keyword(s):  
Power System ◽  
Power Supply ◽  
Lithium Iron Phosphate ◽  
Rapid Development ◽  
Iron Phosphate ◽  
Operating Conditions ◽  
Lead Acid Battery ◽  
Dc Power ◽  
Emergency Power ◽  
Lead Acid

In recent years, the number of DC power system in substation has been increasing. And the technical transformation of DC power system, fault maintenance and other workload is also on the rise, therefore dc emergency power emerged. The lead-acid battery is usually adopted for traditional DC emergency power supply. The disadvantage of lead-acid battery in volume and quality makes it difficult to realize the portability and mobility of dc emergency power. Lithium iron phosphate battery technology is the frontier technology in the rapid development period. However, the characteristics are not studied clearly. This paper studies the characteristics of lithium iron phosphate battery in different ambient temperature, operating conditions, and current of charge and discharge, analyses and summarizes the characteristics of battery charge and discharge, so as to improve the maintenance of station DC power supply system and the reliability of power supply network.

Eddy current separation for recovering aluminium and lithium-iron phosphate components of spent lithium-iron phosphate batteries

2019 ◽  
Vol 37 (12) ◽  
pp. 1217-1228 ◽  
Author(s):  
Haijun Bi ◽  
Huabing Zhu ◽  
Lei Zu ◽  
Yong Gao ◽  
Song Gao ◽  
...  
Keyword(s):  
Eddy Current ◽  
Lithium Iron Phosphate ◽  
Rapid Development ◽  
Current Method ◽  
Recovery Process ◽  
Iron Phosphate ◽  
Dissociation Rate ◽  
Separation Rate ◽  
Magnetic Field Rotation ◽  
Short Service Life

With the rapid development of the electric vehicle market since 2012, lithium-iron phosphate (LFP) batteries face retirement intensively. Numerous LFP batteries have been generated given their short service life. Thus, recycling spent LFP batteries is crucial. However, published information on the recovery technology of spent LFP batteries is minimal. Traditional separators and separation theories of recovering technologies were unsuitable for guiding the separation process of recovering metals from spent LFP batteries. The separation rate of the current method for recovering spent LFP batteries was rather low. Furthermore, some wastewater was produced. In this study, spent LFP batteries were dismantled into individual parts of aluminium shells, cathode slices, polymer diaphragms and anode slices. The anode pieces were scraped to separate copper foil and anode powder. The cathode pieces were thermally treated to reduce adhesion between the cathode powder and the aluminium foil. The dissociation rate of the cathode slices reached 100% after crushing when the temperature and time reached 300℃ and 120 min, respectively. Eddy current separation was performed to separate nonferrous metals (aluminium) from aluminium and LFP mixture. The optimized operation parameters for the eddy current separation were feeding speed of 1 m/s and magnetic field rotation speed of 4 m/s. The separation rate of the eddy current separation reached 100%. Mass balance of the recovered materials was conducted. Results showed that the recovery rate of spent LFP can reach 92.52%. This study established a green and full material recovery process for spent LFP batteries.

Design of Power Supply Modification of Variable Traffic Signs

2021 ◽  
Vol 105 (1) ◽  
pp. 575-587
Author(s):  
Tomáš Binar ◽  
Jana Zimáková ◽  
Petr Baca ◽  
Jiri Fridrich ◽  
Marie Sedlarikova
Keyword(s):  
Energy Storage ◽  
Power Supply ◽  
Traffic Control ◽  
Test Sample ◽  
Lead Acid Battery ◽  
Traffic Signs ◽  
Traffic Lights ◽  
Lead Acid

This paper describes the design of mobile power sets for variable traffic signs for the use of energy storage in lead-acid battery. The supply point is intended primarily for use in powering traffic lights and mobile variable traffic signs for line traffic control. A test sample of the system was assembled, on which a series of measurements were performed to verify its functionality.

scholarly journals Lithium Iron Phosphate (LiFePO4) Battery Power System for Deepwater Emergency Operation

2017 ◽  
Vol 143 ◽  
pp. 348-353 ◽  
Author(s):  
W.D. Toh ◽  
B. Xu ◽  
J. Jia ◽  
C.S. Chin ◽  
J. Chiew ◽  
...  
Keyword(s):  
Power System ◽  
Lithium Iron Phosphate ◽  
Emergency Operation ◽  
Iron Phosphate ◽  
Battery Power ◽  
Lifepo4 Battery

The Necessity of Independent Configuration of the DC Power Supply System Used for Power Supply and Auxiliary Power Supply in Nuclear Power Plant

2018 ◽  
Author(s):  
Zhang Zhichao
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Power System ◽  
Power Supply ◽  
Nuclear Power ◽  
Power Supply System ◽  
Power Source ◽  
Dc Power ◽  
Auxiliary Power ◽  
Ac Power

At present, in the typical design of China’s nuclear power plant, main generation system is connected to the power grid by 500 kV system. 500 kV system as a priority power source, 220kV system as an auxiliary power source. Independent operation of 500kV and 220kV system, improved the reliability of power supply of nuclear power plant. However, the DC 220V power system used to control the 500kV and 220kV system in the switch station of partial nuclear power project is not independently configured, and the design form of one set of DC system is used in the transformer station. In recent years, there are many accidents that AC power enters into the DC power system, resulted in the loss of power source in the transformer station. The loss of external power source in the whole plant is very significant. In this paper, the influence of AC power entering into DC power system on relay protection device is analyzed, the measures to prevent the AC power into DC power system are discussed, the necessity of independent configuration of DC control power system for the 500kV priority power system and 220kV auxiliary power supply system is analyzed.

scholarly journals Opportunity for Improving Lead-Acid Battery Management of Photovoltaic-Genset-Battery Hybrid Power Systems Based on Measured Field Data

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2237 ◽  
Author(s):  
Andrew Swingler ◽  
Jordan Torrealba
Keyword(s):  
Power System ◽  
Winter Season ◽  
Management Approach ◽  
Battery Management ◽  
Lead Acid Battery ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Battery Capacity ◽  
Battery Bank ◽  
Lead Acid

In this communication, the measured behaviour of a lead-acid battery bank within a stand-alone residential solar photovoltaic (PV)-genset-battery hybrid power system in Canada is presented and discussed. In order to capture rare field-based battery performance data, a newly commissioned lead-acid battery bank was equipped with a battery monitoring device capable of logging voltage, current, temperature and amp-hours every 30 s for the life of the battery. The measured data captures a severe loss of battery capacity due to a combination of short-term deep discharge and extended partial state of charge operation—conditions not unusual during winter season PV-genset-battery hybrid power system operation. Subsequent manual override of the system control set points to encourage gradual battery overcharge are shown to recover the lead-acid battery bank’s performance over the following three months. Limitations of the power conversion system’s battery management approach are discussed and a novel closed loop control system for improving lead-acid based PV-genset-battery hybrid system performance is rationalized and proposed for further research.

Float-Charging Characteristics of Lithium Iron Phosphate Battery Based on Direct-Current Power Supply System in Substation

2016 ◽  
Vol 142 (1) ◽  
pp. 04015016
Author(s):  
Zengfu Wei ◽  
Guobin Zhong ◽  
Wei Su ◽  
Wenhong Wang ◽  
Yanquan Zhang ◽  
...  
Keyword(s):  
Direct Current ◽  
Power Supply ◽  
Power Supply System ◽  
Lithium Iron Phosphate ◽  
Iron Phosphate ◽  
Supply System

Numerical and Experimental Study of Lead-Acid Battery

2016 ◽  
Author(s):  
Vicente D. Munoz-Carpio ◽  
Jerry Mason ◽  
Ismail Celik ◽  
Francisco Elizalde-Blancas ◽  
Alejandro Alatorre-Ordaz
Keyword(s):  
Experimental Study ◽  
Renewable Energy Sources ◽  
Operating Conditions ◽  
Constant Current ◽  
Lead Acid Battery ◽  
Physical Processes ◽  
Lead Acid Batteries ◽  
Secondary Battery ◽  
Industrial Storage ◽  
Lead Acid

Lead-Acid battery was the earliest secondary battery to be developed. It is the battery that is most widely used in applications ranging from automotive to industrial storage. Nowadays it is often used to store energy from renewable energy sources. There is a growing interest to continue using Lead-Acid batteries in the energy systems due to the recyclability and the manufacturing infrastructure which is already in place. Due to this rising interest, there is also a need to improve the efficiency and extend the life cycle of Lead-Acid batteries. To achieve these objectives, it is necessary to gain a better understanding of the physics taking place within individual batteries. A physics based computational model can be used to simulate the mechanisms of the battery accurately and describe all the processes that are happening inside; including the interactions between the battery elements, based upon the physical processes that the model takes into account. In the present paper, we present a discharge/charge experimental study that has been carried out with small Lead-Acid batteries (with a capacity of 7 Ah). The experiments were performed with a constant current rate of 0.1C [A]1 for two different battery arrangements. An in-house zero dimensional model was developed to perform simulations of Lead-Acid batteries under different operating conditions. A validation analysis of the model was executed to confirm the accuracy of the results obtained by the model compared to the aforementioned experiments. Additional simulations of the battery were carried out under different current rates and geometry modifications in order to study how the performance of the battery may change under these conditions.

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