Study on the Maintenance and Management of VRLA Battery

2014 ◽  
Vol 644-650 ◽  
pp. 3902-3905
Author(s):  
Wen Cui Li ◽  
Yi Yang ◽  
Hao Zhang ◽  
Jing Xian Lv ◽  
Xin Jian Shu
Keyword(s):  
Test Methods ◽  
Processing Method ◽  
Control Measures ◽  
Lead Acid Battery ◽  
Operation And Maintenance ◽  
Basic Characteristics ◽  
Maintenance Requirements ◽  
Vrla Battery ◽  
Charge Discharge ◽  
Discharge Test

The paper introduced the basic characteristics, maintenance requirements and backward cell processing method of Valve Regulated Lead Acid Battery (VRLA) based on the practice of substation communication, elaborated the charge-discharge test battery requirements. This paper discussed the test of battery operation and maintenance, charge and discharge risk. Through the test methods of battery communication charging and discharging and the steps of analysis, we find out the possible dangerous points in processing of charging and discharging, and at the same time, we list the typical examples on safety risk and carry on the analysis on accident cause to put forward the pre-control measures.

Preparation and Performance of Si/Al/C Composites Anode Material Prepared by Glucose-Modified

2012 ◽  
Vol 164 ◽  
pp. 268-271
Author(s):  
Xu Ma ◽  
Ling Long Kong ◽  
Yu Ling Liu ◽  
Yan Hong Ding ◽  
Jie Zhao ◽  
...  
Keyword(s):  
Anode Material ◽  
Coulombic Efficiency ◽  
Test System ◽  
Cycling Stability ◽  
Charge Capacity ◽  
And Performance ◽  
Charge Discharge ◽  
Discharge Test

Si/Al/C composites were synthesized by the method of doping aluminum and glucose-modified. The samples were characterized by XRD, SEM, and the capacity and cycling stability of the composites were tested by electrochemical charge/discharge test system. After glucose was pyrolyzed, the first discharge and charge capacity of Si/Al/C composites were 1312 and 956.7mAh/g, and the first coulombic efficiency was 72.9%. After 50 cycles, the capacity of Si/Al/C composites was 440mAh /g and the coulombic efficiency remained over 98.1%

Experience Concerning 1200-psi Naval Steam Generators

1969 ◽  
Vol 6 (03) ◽  
pp. 254-267
Author(s):  
J. E. Kaune ◽  
W. A. Fritz
Keyword(s):  
Training Program ◽  
Optimum Design ◽  
Steam Generators ◽  
Auxiliary Equipment ◽  
Operation And Maintenance ◽  
Naval Ship ◽  
Boiler Operation ◽  
New Type ◽  
Extensive Program ◽  
Maintenance Requirements

At a meeting held in the Naval Ship Engineering Center, Philadelphia Division, in January and February 1967, the following were found to be the principal reasons for the 1200-psi-boiler problems:Introduction of a new type of boiler without a sufficient training program;lack of a sufficient supply parts backup;lack of adequate manuals and documentation;lack of sufficient auxiliary equipment to assist in boiler operation and maintenance, and lack of optimum design features. This paper describes the aforementioned problems and what has been and is being done to improve conditions. An extensive program is now underway to vastly improve overall boiler reliability and decrease maintenance requirements.

Preparation and Electrochemical Performances of Calcium Zincate Synthesized by Microwave Method

2011 ◽  
Vol 236-238 ◽  
pp. 868-871 ◽  
Author(s):  
Meng Liang Tong ◽  
Xuan Yan Liu
Keyword(s):  
Cyclic Voltammetry ◽  
Active Material ◽  
Electrochemical Performances ◽  
Microwave Method ◽  
X Ray ◽  
Battery Charge ◽  
Secondary Battery ◽  
Initial Capacity ◽  
Charge Discharge ◽  
Discharge Test

Calcium zincate as an active material in Zn/Ni secondary battery has been successfully synthesized by microwave method. The chemical composition of Ca(OH)2·2Zn(OH)2·2H2O was confirmed by X-ray powder diffraction pattern and weight loss in thermogravimetric analysis.The results of cyclic voltammetry and experimental Zn/Ni battery charge–discharge test showed that the material of calcium zincate had excellent electrochemical performances: a high discharging platform of 1.685 V and a good cycleability, discharge capacity would be 70.0% of initial capacity after circulated 120 times.

Stability Analysis and Control Measures of the Kim-Yun-Mine Collapse

2012 ◽  
Vol 594-597 ◽  
pp. 358-361
Author(s):  
Shan Shan Zhang ◽  
Yu Liang Wu
Keyword(s):  
Rock Mass ◽  
Stability Analysis ◽  
Stereographic Projection ◽  
Control Measures ◽  
Collapse Characteristics ◽  
Basic Characteristics ◽  
The Stability ◽  
Mine Collapse ◽  
And Control ◽  
Dangerous Rock Mass

Collapse is one of the major geological disasters all over the world and threats to life and property safety of people. To make a better understanding of the reason it occurs and how to deal with it, the Kim-Yun-Mine collapse is researched. There are one dangerous rock mass and two collapse accumulation body. The basic characteristics of the collapse is described clearly according to the geological exploration data, and the stability of the dangerous rock mass and the collapse accumulated body is analyzed in the way of engineering geology and stereographic projection. At last, we put forward comprehensive control measures based on the results of stability analysis and collapse characteristics.

Insufficient respiratory hazard identification in the safety data sheets for cleaning and disinfection products used in healthcare organisations across England and Wales

2021 ◽  
Vol 78 (4) ◽  
pp. 293-295
Author(s):  
Sewon Lee ◽  
Andrew C Povey ◽  
Martin J Seed ◽  
Martie van Tongeren
Keyword(s):  
Healthcare Workers ◽  
Safety Data ◽  
Qsar Model ◽  
Quantitative Structure Activity Relationship ◽  
Test Methods ◽  
Hazard Identification ◽  
Control Measures ◽  
Hazardous Chemicals ◽  
England And Wales ◽  
Cleaning And Disinfection

BackgroundExposure to cleaning and disinfection products has been associated with respiratory disorders such as asthma in cleaning and healthcare workers. Safety data sheets (SDSs) provide information on hazardous chemicals that are present in products to help users with risk assessment and implement appropriate control measures. However, they have potential limitations in identifying respiratory hazards due to a lack of regulatory test methods for respiratory sensitisation and irritation of chemicals.MethodsSDSs were first used to identify chemicals on the database as respiratory sensitisers and irritants. A quantitative structure–activity relationship (QSAR) model and an asthmagen list established by the Association of Occupational and Environmental Clinics (AOEC) were used to identify potential respiratory sensitisers and irritants (by the AOEC list only) in the cleaning and disinfection products.ResultsFrom a total of 459 cleaning and disinfection products used in healthcare organisations across England and Wales, 35 respiratory sensitisers not labelled as such on the SDS were identified by QSAR or AOEC. Only 2% of cleaning and disinfection products contained at least one respiratory sensitiser as identified by their SDSs; this was increased to 37.7% of products when the QSAR or the AOEC list was used.ConclusionsA significantly higher proportion of cleaning products contain respiratory hazardous chemicals, particularly respiratory sensitisers than would be expected from the information provided by SDSs alone. Cleaners and healthcare workers may, therefore, be insufficiently protected.

Correlation between Battery Voltage under Loaded Condition and Estimated State of Charge at Valve-Regulated Lead Acid Battery on Discharge Condition using Open Circuit Voltage Method

2018 ◽  
Vol 9 (1) ◽  
pp. 357
Author(s):  
Ahmad Qurthobi ◽  
Anggita Bayu Krisna Pambudi ◽  
Dudi Darmawan ◽  
Reza Fauzi Iskandar
Keyword(s):  
Open Circuit Voltage ◽  
Open Circuit ◽  
State Of Charge ◽  
Lead Acid Battery ◽  
Battery Voltage ◽  
Measured Voltage ◽  
The Common ◽  
Loaded Voltage ◽  
Vrla Battery ◽  
Lead Acid

One of the common methods that developed to predict state of charge is open circuit voltage (OCV) method. The problem which commonly occurs is to find the correction parameter between open circuit voltage and loaded voltage of the battery. In this research, correlation between state of charge measurement at loaded condition of a Panasonic LC-VA1212NA1, which is a valve-regulated lead acid (VRLA) battery, and open circuit voltage had been analyzed. Based on the results of research, correlation between battery’s measured voltage under loaded condition and open circuit voltage could be approached by two linearization area. It caused by K v ’s values tend to increase when measured voltage under loaded condition V M < 11.64 volt. However, K v values would be relatively stable for every V M ≥ 11.64 volts. Therefore, estimated state of charge value, in respect to loaded battery voltage, would increase slower on V M < 11.64 volts and faster on other range.

scholarly journals Change in Specific Gravity of the Acid Electrolyte in the Lead-acid Battery Upon Repeated Charge-discharge Cycles

2005 ◽  
Vol 3 (2) ◽  
pp. 763-766 ◽  
Author(s):  
Shoichiro Ikeda ◽  
Satoshi Iwata ◽  
Kenichi Nakagawa ◽  
Yosinari Kozuka ◽  
Akiya Kozawa
Keyword(s):  
Specific Gravity ◽  
Lead Acid Battery ◽  
Acid Electrolyte ◽  
Charge Discharge ◽  
Lead Acid
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