The LithiumWerks ANR26650M1-B is the next generation of A123 Systems' pioneering 26650 cylindrical cell, now with greater power and energy density and lower impedance. This versatile lithium-ion cell is suitable for a wide variety of applications and system designs.

About module:

A battery management system (BMS) is any electronic system that manages a rechargeable battery (cell or battery pack), such as by protecting the battery from operating outside its safe operating area, monitoring its state, calculating secondary data, reporting that data, controlling its environment.

About Battery pack:

• A battery pack is a set of any number of (preferably) identical batteries or individual battery cells.
• They may be configured in a series, parallel or a mixture of both to deliver the desired voltage, capacity, or power density.

Mechanical Design of battery pack:

The high voltage battery it is one of the most important components of a battery electric vehicle (BEV).

The battery parameters have a significant influence on other components and attributes of the vehicle, like:

• maximum traction motor torque
• maximum regeneration brake torque
• vehicle range
• vehicle total weight
• vehicle price

Pretty much all major aspects of a pure electric vehicle (EV) depend on the parameters of the high voltage battery.

For our electric vehicle battery design we are going to start from 4 core input parameters:

• chemistry
• voltage
• average energy consumption of the vehicle on a driving cycle
• vehicle range

Battery calculation:

ANR26650M1-B Technical data:

Cell Dimensions	26 x 65 mm
Cell Weight	76 g
Cell Capacity (nominal/minimum) (0.5C Rate)	2.5/2.4 Ah
Voltage (nominal)	3.3 V
Internal Impedance (1kHz AC typical)	6mΩ
Power	2600 W/kg
Recommended Standard Charge Method	2.5A to 3.6V CCCV, 60 min
Recommended Fast Charge Method to 80% SOC	10A to 3.6V CC, 12 min
Maximum Continuous Discharge	50 A
Maximum Pulse Discharge (10 seconds)	120 A
Cycle Life at 20A Discharge, 100% DOD	>1,000 cycles
Operating Temperature	-30°C to 55°C
Storage Temperature	-40°C to 60°C

Battery pack capacity: 18 kWh

Voltage = 400v

1.Energy =18Kwh

2.No.of cells(n)=energy/nominal voltage*capacity

N = 18000/3.3*2.5

N=2182

So that we were required to bring the 2182 cells to get 18kwh energy on based on series and parrel connection

In series-Current is remained the whole process is const and voltage is various changes

In parallel-voltage is remained the whole process is const and current is various changes

And final 40v is required to run off battery vehicle

The nominal voltage of 1cell is 3.3V

Then the number of series cells required to produce 400V(ns)

Ns = voltage required/nominal voltage of one cell

Ns = 400/3.3

Ns = 121.21=122

122 cells are connected in series will get generated 400voltage

And capacity of the whole module will be 2.5AH

Now we need to find the number of cells which will be connected in a parallel(Np)

Np = total cell/Ns

=2182/122

Np = 18

3. Battery capacity

capacity = parallel cell row *individual cell capacity

capacity = 18*2.5

Capacity = 45Ah

4.Range

Range = capacity(energy consumed per kilometer)

Range = 18000/100

R = 180km

5.Current supplied by the battery

Already capacity is 45Ah and which considered as c-rate

6.Internal resistance of battery:

It means of negative terminal to positive terminal is known as internal resistance of battery

7.Weight of battery pack

Cell weight = 76Kg

Number of cells = 2182

Battery pack weight (w) = cell weight*number of cell+weight of accrssiors

W = 76*2182+4.5 = 165.8 = 166Kg

Cylindrical battery pack assembly equipment:

Product Name	Description
Automatic Cylindrical Battery PVC Heat Shrink Wrapping Machine	Film speed:50~70PCS/MIN Film precision:±0.1MM
512 Channel Battery Tester	5V 2A/3A/5A/6A 512 Channel Battery Testser optional
Battery Labling Insulation Paper Sticking/Pasting Machine	Sticker Matrials:Barley paper or PVC Barley paper Maxium 350mm;Scroll Internal Diameter 72-75MM
Battery Sorting Machine	(5/6/9/11/13/22 Channel Battery Sorter optional) Data record funtion is selectable
Manual Spot Welding Machine	Pneumatic AC Spot Welding Machine (Single Welding Point or Doubel Welding Point)
Manual Spot Welding Machine	AC Pedal Manual Spot Welding Machine
Manual Spot Welding Machine	AC Pulse Pneumatic Spot Welding Machine
Manual Spot Welding Machine	DC Output Spot Welding Machine
Manual Spot Welding Machine	5000A/8000A Pneumatic Inverter DC Spot Welding Machine
Automatic Spot Welding Machine	Double Sides Spot Welding Machine
1-24 series or 1-32 series BMS Tester	Over-discharge Protection Current:0-120A Overcharge Protection Current:0-50A Overcharge/Overdischarge Voltage:0.5-5V
Battery Comprehensive Tester	100V 120A 18650 Battery Pack Comprehensive Tester
Aging Machine	30 V 10A Charging 20 A Discharging Aging Machine
Aging Machine	70 V 5A Charging 10 A Discharging Aging Machine
Aging Machine	100 V 10A Charging 20 A Discharging Aging Machine

series connection and parallel connection

Connection:

>CONCLUSION:

• Understand the how-to battery pack calculation of given capacity
• Understand how to calculate the number of series and number of parallel cells
• Understand C-rate and how to calculate the given parameters and the whole structure of the battery assigned
• Final cell structure = 122 series and 18 parallel = 122S18P