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Questions related from Praveen Kumar Kuppusamy
Hello everyone, All lithium ion battery pack/system in the Electric vehicle (EV) needs to achieve certain certification before entering the country's market. So does anyone know all the standards,...
21 June 2021 10,002 4 View
Hello everyone, All lithium ion battery pack/system in the Electric vehicle (EV) needs to achieve certain certification before entering the country's market. So does anyone know all the...
10 May 2021 7,659 2 View
How do I change the voltage limits in the Matlab 1 RC model? I tried doing, but the voltage always starts at only one value.
13 October 2020 6,038 0 View
Hello everyone, I have 5 Samsung 21700 - 50 E (NCM chemistry) cells. I want to do basic charge and discharge by connecting it in series. Does anyone know if there is a cell holder available...
06 October 2020 6,312 3 View
Hello all, By modifying the PWM of the CP signal, I can change the charging current of Electric vehicles in AC charging. But how the current is controlled/reduced accordingly? Which side does...
25 November 2019 7,131 1 View
Hello, Currently one can estimate the ageing cycles (charge+discharge) of EV. Does anyone know how much is the cycle is vehicle2grid facility is introduced ? This number can be for any EV as...
09 July 2019 5,073 2 View
Hello, Does anyone know the cost to install Vehicle2grid service at home or commercial places ? I found a rough price as 5000$ in internet, but could anyone recommend a much cheaper solutions or...
08 July 2019 5,789 3 View
Hello all, Does anyone know what is the cell chemistry, shape and capacity of single cells used in latest Smart electric car ? In general I know that it is Lithium ion, but i needed to know about...
07 February 2019 7,111 7 View
Hello, Currently in my project, I am making a hardware controller which can modify the incoming PWM signal and vary the EV A.C charging. To start of with, does anyone know which exact chapters of...
22 January 2019 6,760 2 View
After changing a lithium ion (LFP) battery's SOC eg: 100 to 80 % and the cell is now made to rest to attain equilibrium. During this wait period, what all parameters change ? And it increases or...
19 June 2018 1,488 2 View
Does anyone know why I get this weird EIS spectra (pic attached) at high temperature on Li-ion full cell? I use high power A123 26650 cyclindrical LFP cell (2.5 Ah). My EIS device is BRS...
11 June 2018 7,480 6 View
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...
26 April 2018 5,330 1 View
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...
17 April 2018 199 0 View
Hi, I have one 50*3 matrix (see picture). I separate the first 10 *3 values into another matrix, then the next 10 to another and similarly divide them to 5 matrices. I separated this manually....
01 March 2018 2,857 7 View
Hi, When I try to plot in Scilab, no graphic window is generated (see pic). This is a simple plot between two columns of one matrix. Sometimes, I get error saying 'invalid index'. Does anyone know...
22 February 2018 3,663 3 View
Hi, I am using zview software to fit EIS data (26650 Li-ion cell) to equivalent circuit. I am using warburg element (short) to represent diffusion. they contain 3 parameters W-R, W-T and W-P (see...
12 February 2018 5,804 12 View
I am using Zview software for EIS fitting of Lithium ion full cell (26650). The software has two warburg elements (short and long). Does anyone know which one to use ? I have attached my sample plot
12 February 2018 5,778 5 View
Hi, I want to extract equivalent circuit parameters such as R0,R1,R2,C1,C2 and OCV from Electric vehicle drive cycle (voltage vs time) to model Lithium ion battery. The car battery is made of LFP...
31 January 2018 7,751 1 View
Hi, For Lithium ion cell Impedance Spectroscopy analysis, I wanted to load my data to EC lab software. But whatever format I import, I get the error ' Can't load file'. Does anyone have a sample...
31 January 2018 7,856 7 View
Hi, I have set a soc and waited for one hour, then proceeded with Electrochemical Impedance Spectroscopy on Lithium cell (LFP 26650), repeated the same procedure with two hour waiting period. The...
24 January 2018 2,595 8 View
Hi, I have set of Impedance Spectroscopy data as .mat in Matlab workspace. I need to convert .z file format so that they can be fed in zview software to do equivalent circuit fitting. Any help...
08 December 2017 7,736 6 View
Hello experts, At x °C, x SOC I did Electrochemical Impedance Spectroscopy on 2.5 Ah Li-ion battery (Full cell) and followed by discharge current pulse (2C) measurements. I fitted EIS through...
06 November 2017 5,910 6 View
Hi experts, I am using 2RC Equivalent circuit battery model (time domain) to fit 26650 LiFeP cell data at 25,50,0 °C. When I compare between these 3 temperatures, 50 °C has highest capacitance...
19 September 2017 2,311 1 View
BMS records/ processes the data obtained from the battery packs. When these data is compared to the battery model, what's the maximum acceptable accuracy/RMSE in terms of mV or % ? Additional...
15 September 2017 8,389 2 View
I am using 2RC Equivalent circuit model to fit discharge current pulses of LFP cell. I use 4 pulses (8C, 4C, 2C, 1C). The RMSE is good for 2C and 1C~5mV, but for 4C and 8C it seems to increase...
12 September 2017 7,072 3 View
I have a set of discharge current pulse values (Voltage vs Time) as well as Impedance Spectroscopy data of Li-ion battery. How could I transfer these pulses to frequency domain and fit with other...
30 June 2017 5,718 3 View
I am comparing simulated vs experimental values of Current pulse discharge test of LiFePo4 2.5Ah battery. The maximum error value I get is 21mV and mean is 10mV. Is it acceptable ? What is the...
13 June 2017 3,332 0 View
I am using A123 26650 Lion cell with nominal capacity of 2.5Ah. I did a pulse discharge test of 20C for 1s at 100% SOC, room temperature. When I made to relax for 7min, the OCV tends to decrease...
10 May 2017 1,214 6 View
Does anyone know the heat release from 48 V, 10 kWh Lithium battery module? This is to know what happens during Abuse testing
01 January 1970 7,118 2 View
