Project 4

First we have to Do calculation part for the find the battery pack capacity for this

Given Data is Vehicle Weight= 300kg

Motor Rating=1200wh,65V

Range=225Km

Max Speed=60 kmph

First we have to calcualte Motor Current

Power=V*I

1200= 65 * I

I=1200/65

I=18.46 A

Current withdrawn By Motor 18.46 Amp

Assure Current Loss 1-10%

After loss new motor current 18.46*1.05=18= 19.38 amp

Now Calculate the Power requried at max speed

At 60kmph power=Voltage * Current ; Power= 65 * 19.38 ; power= 1260 w

Then We Have to calculate Travel Factor

Travel Factor= Total Range/ Total Speed; Travel Factor = 225/60= 3.75

To calculate Power based on Travel Factor

Power requried = Power * Travel Factor ; power rquried= 1260 *3.75= 4.7 kw

Then we have to calculate Battery pack capacity based of efficiency

we take Battery pack efficiency 85-95%

we take 85%

Required Battery Pack Capacity =4.7/0.85=5.52 kw

Then we Calculate Battery pack efficiency based on motor efficieny

Total Battery Pack capacity = 5.52 /0.85 = 6.49 kwh

Now we have find how much connection comes in series and paraller

Series Connection

Motor Voltage 65 V

Cell Volatge 3.7 v

No of series cells 65/3.7= 18

18 cells in series

Paraller Connection

Motor Current 19.38 A

Cell current 2.8 A

No of paraller cells 19.38/2.8= 7

7 Cells in paraller

This All are the calaculation Part of Battery

Now we See How to Developed Battery Pack

-First we have to select Cells Type then size of cells

-we have to select Raw material for Battery Aluminium Foil,Aluminium and Copper Mesh,Nickel/Aluminium strip,Lithium Metal foil,Cathod and anode Electrode ,Aluminum Laminated Film,Copper Foam,Nickel and Iron-nickel form,Lithium chips,Nickel tabs,Electrolyte, Graphite Sheet,Lifepo4,LiNiMnCo02,PVDF,Graphite

-Then we have to manfacture Anode and Cathod Eletrode inside that we used LiMo2 at cathode side and anode Graphite

-then we have to do connection of cells in paraller and series with help spot welding and wire Bounding

Wire bonding

-Then we have to make module of cells

Then we used protecting vent for protection of battery

-Then we Mound BMS system upper side of battery for saftey of battery pack for number error

-Then we make the battery pack for collection of all module together

-Then we have to do same test for battery pack

-safety test,mechanical test,Aging test,Performance test

this all step involved to devloped battery pack