Challenge

Project 4

Initially calculations are done so as to find out the capacity of the battery.

After deciding the capacity next step is to find out the number of series parallel combination of cell.

Anode and cathode materials are selected based on their properties.

The terminals of the batteries in series and parallel are spot welded using Nickel strip so as to establish connection between them.

Select proper ventillation and cooling method for the battery so as to desipate the heat produced during the working.

Design the BMS

A BMS is a system that manages lithium-ion battery packs through integrated firmware and hardware.

Here the lithium ion battery datasheet of EMB company is used

Battery capacity-： 2600mAh (0.52A Discharge，2.75V)

Typical Capacity：2550mAh（0.52A Discharge，2.75V）

Minimum Capacity：2500mAh (0.52ADischarge，2.75V)

Nominal voltage:3.7V

Given power=1200W

Voltage of motor=65V

Power=VI

so 1200=65*I

I=18.5A

Consider acceleration power required .Here it is assumedd to be 5% that i 5 percent more current will be drawn

I=18.5*1.05=19.5A

Given total distance to cover=225km at 60kmph

So travel factor is to be calculated

Travel factor =225/60=3.75

so total power=3.75*19.5*65=4755Watt

Total power required=4.7kW

Assume battery efficiency=0.85

Motor efficiency=0.85

So total power required

4.7/0.85*0.85=6.5kW

So battery capacity =6.5kWh

Calculation of series parallel combination

Total power = 6.7kWh

Voltage of motor =65v

Current required =6700/65=104A

So parallel connections=104/0.52=200

Series connections=65/2.75=24

Total no of series parallel combinations = 24*200=4800

Ship work like this
in your own course.