During OCV test test of Li-ion batteries, how long is the pause time between charge and discharge cycles ?

Hi, At 1C-rate, I am doing OCV test on A123 li-ion cyclindrical cells to measure capacity & internal resistance. At the end of discharge cycle how long is the pause time after which I can...

07 August 2018 8,447 2 View

Why to rest battery for some hours before performing Electrochemical Impedance Spectroscpy ?

I am performing EIS (BRS Messtechnik, galvanostatic) on cyclindrical A123 26650 LFP full cell. After setting SOC it is required to wait for some hours before carrying out EIS. I know it is to...

05 June 2018 8,968 0 View

Where to find cheap test stand for Impedance measurements of LFP 26650 full cells ?

Hi, I have 9 26650 LFP cells connected in series and impedance is measured one after the other using BRS EIS device. Currently I have soldered the batteries, but the EIS spectra is not a good...

04 May 2018 5,301 0 View

Automate Kramer Kronig fitting for batch processing ?

I have set of Electrochemical Impedance spectroscopy data of Lithium ion full cell (26650). Then I do Kramers-Kronig fitting using Lin tool of KIT. But this tool allows one cell after another...

03 April 2018 7,582 0 View

Matlab create a file with same name as the one scanned ?

Hi, file='Data.xlsx' M=xlsread(file) Now I want to create a text file of the same name as in the excel name fileID=fopen() Can anyone tell what command comes here ? like sprintf or something...

03 April 2018 6,212 6 View

Scilab read xlsx file ?

Hi, I have about 100 excel.xlsx file and wanted it to read with some Scilab xls or csv function. I could read this excel xlsx format. Also I don't want to use the import data format as I have...

03 April 2018 1,239 0 View

Matlab read csv files and separate columns which contains numeric + string ?

Hello, I have 100*10 matrix. I don't need the first 13 rows (they are strings). I need all data from 14th row. One columns (6) contains string which I don't need. Can anyone tell me how to read it...

03 April 2018 8,592 0 View

Function in Scilab similar to Matlab xlswrite ?

Hi, Similar to Matlab xlswrite(filename,A), what is the function name in Scilab to write on a new excel file ? I tried searching, but couldn't find out. There was only write_csv...

03 April 2018 5,395 2 View

Auto delete highly deviated value while taking the mean in Matlab ?

Hi, I have matrix 'x' (see pic) with 5 values. Out of those one value deviates from the rest. So when I take the mean, standard deviation and plot with errorbar in Matlab, the deviation seems to...

02 March 2018 271 3 View

Why lithium ion battey's Double layer capacitance decreases with decrease in temperature ?

I am using equivalent circuits to fit 26650 LFP's current pulse measurements. We know that as temperature increases, the resistance decreases because of the ion's mobility. But at the same time,...

02 March 2018 109 9 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View

Timeout error!! Processor in the loop (PIL) using STM32F4 Matlab 2018a?

Dear Researchers I am trying to perform a PIL simulation using STM32F4 Discovery board and comunication serial USB TO TTL. During simulation I receive the following timeout error: An error...

01 March 2021 2,327 1 View

How to size battery banks?

I am designing a small grid connected solar PV power-plant. As the battery's capacity is specified in Ah and demand in kWh. What is the best way to size the battery bank? I have battery price in...

28 February 2021 1,638 3 View