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Week 8 Multi cell Battery Pack
Need of Cell battery Pack: Single cell, cannot provide the required tractive force effort to the EV so the combination of the cells need to be connect to series and parallel for voltage and current boosting respectively. Weakest Cell: Fig: Assumtion of that all cells are connected in series. During Charging the weakest…
Satish M
updated on 13 Feb 2021
Need of Cell battery Pack:
Single cell, cannot provide the required tractive force effort to the EV so the combination of the cells need to be connect to series and parallel for voltage and current boosting respectively.
Weakest Cell:
Fig: Assumtion of that all cells are connected in series.
During Charging the weakest cell, cell 2 is charges fast and rest of the cells are not charged further with BMS trigger the charging circuit. So cell 4 is weakest cell of the string
If the string is discharging then the cell 4 discharges fast, so other cells are not utilize its capacity.
Solution
Instead of connected series string to parallel for reaching the total capacity of EV battery pack. The connetions are changed to parallel string to series connected strings. The weakest cell is balancing among only that parallel string.
Conclusion:
The report presents the effect of weak cell in the battery string.
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Read more Projects by Satish M (26)
Project 1 (Mini Project on Vehicle Direction Detection
Project Title: Vehicle Direction Determination Aim To create a Simulink model of Vehicle Direction Detection as per the Requirement data. General Overview: Identifying the direction of the vehicle is one of the important & diverse features in Autonomous driving & Advanced Driver Assistance Features. This particular sub-feature…
15 Oct 2023 06:26 PM IST
Project 1
Boost Converter (CCM): Vi=20-30V V0=40V Vo/Vi=1/1-D Range of Duty Cycle if Vi is 20 40/20=2 1-D=0.5 D=0.5 If Vi=30 Vo/vi=4/3 1-D=1.33 D=0.33 Calculation of Load Resistor: As per given data P=600W V0=40V R=Vo^2/P R=1600/600 R=2.66 ohm Calcultion of Inductance: Assume fs=100khz current ripple is 20% Inductor current…
10 Nov 2021 06:47 AM IST
Week 4 Challenge
Consider the following operating points of a fuel cell during a short period of operation. 15 W/cm2 3 W/cm2 27 W/cm2 Where would these points go in the diagram below? The power at some points are as follows P1=1V*0A/cm2 =0w/cm2 P2=0.75*0.3= 0.225 w/cm2 P3= 0.6*0.75 =0.45 w/cm2 P4=0.25*1.15 =0.2875 from the above points…
23 Jun 2021 08:23 AM IST
Week 7 Challenge
The vehicle parameters for modeling in MATLAB/Simulink is as follows fr = coefficient of rolling resistance =0.015g = gravitational acceleration=9.81M = vehicle mass=1910.2kgQ = air density=1.29Cx = aerodynamic drag coefficient=0.4170A = frontal surface area of the vehicle=2.86 The simulation is divided into four sections…
20 May 2021 11:58 AM IST
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