Project 1 Mechanical design of battery pack

Battery pack capacity: 18 kWh

Cell: ANR26650M1-B

Nanophosphate - High power lithium ion cell

fig1

Series and parallel connections

In series circuit connection, components are connected end to end while in parallel ,all components are connected across each other forming electrically common points.

(From datasheet)

Cell nominal voltage = 3.3V

Nominal capacity = 2.5 Ah

Cell energy capacity = 3.3*2.5=8.25

Energy capacity in terms of kilowatt(total power of battery pack) = 18kWh or 18000Wh

Module - 4s & 4p

fig2

fig3

(Model was made using CATIA)

Voltage of each module = 4*3.3=13.2V

Capacity of each module = 4p*2.5=10Ah

Therefore we need 13.2V & 10Ah single module capacity.

Now lets consider battery pack voltage capacity which is considered as 52V

fig4

We need to calculate the number of modules in series and parallel.

Considering NSM(no. of series module) = battery capacity(V) / voltage of each module = 52V/13.2V = 3.9 = 4 modules in series.

Considering NPM(no. of parallel module) =Energy capacity in terms of kilowatt/52V

Total energy capacity in Ah be 18000Wh/52V = 346 Ah

Therefore NPM = 346/10 = 34.6=35 modules in parallel

Thus we need 4s & 35p

Calculating total capacity in terms of kilowatt

4s*35p*(4*3.3)*(4*2.5) = 18480Wh = 18KWh apx.

Applications of cell mentioned above

COMMERCIAL SOLUTIONS

Advanced lead acid replacement batteries for:

Datacenter UPS
Telecom backup
IT backup
Autonomously guided vehicles (AGVs)+ Industrial robotics and material handling equipment

GOVERNMENT SOLUTIONS

Military vehicles
Military power grids
Soldier power
Directed energy

GRID SOLUTIONS

Frequency regulation
Renewables integration
Reserve capacity
Transmission and distribution

TRANSPORTATION SOLUTIONS

Hybrid, plug-in hybrid and electric vehicle battery systems for:

Commercial vehicles
Off-highway vehicles
Passenger vehicles