EVBot by Cascadia Motion, LLC

EVBot™ by Cascadia Motion, LLC

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Welcome to EVBot!

EVBot will guide you through Cascadia Motion product selection and provide simplified calculations to predict the performance of your EV project.

Want some guidance on using EVBot? Try these videos:
Quick Start (5m51s) Advanced Features (19m18s)



Color Key: Green:
Start Here 		Black:
Inputs Required for Calculations		 Gray:
Auto-Filled From Inputs
But Can Be Overridden		 White:
Calculated Value

Required Vehicle Level Inputs (Click to Expand)

By filling out the number of motors and selecting voltage level, motor, inverter, gearing and batteries, EVBot will auto-fill most of the input parameters with initial values for you. You can then tweak those values manually in the next sections to best fit your vehicle configuration.

For helpful tips, roll your mouse over the question marks below.

Front   Rear
Number of Front Motors

 
 Number of Rear Motors

Voltage Level

 
 Voltage Level

Motor Selection
Quick View Details

  Motor Selection
Quick View Details

Inverter Selection
Quick View Details

  Inverter Selection
Quick View Details

Gearing Selection
Quick View Details

  Gearing Selection
Quick View Details

Battery Module Selection
Quick View Details

  Battery Module Selection
Quick View Details

Number of Battery Modules in Series

  Number of Battery Modules in Series

Number of Battery Modules in Parallel

  Number of Battery Modules in Parallel

You can use either of the two battery module selection areas if you only have one battery pack in the vehicle. Even if you have motors on both ends, feel free to use only one battery pack. if you want to look at two pack options simultaneously or if you really plan to have separate front and rear packs then use both!
Battery Capacity (kWh)

 
 Battery Capacity (kWh)

Pack Voltage Max (V)

 
 Pack Voltage Max (v)

Vehicle Top Speed (mph)

 
 Vehicle Top Speed (mph)

Vehicle Top Speed (kph)

  Vehicle Top Speed (kph)

 

Vehicle Weight and Tires

Vehicle Loaded Weight (kg)

lbs
Front Tire Size
(e.g. 275/35R19)

Rear Tire Size
(e.g. 325/30R19)

  Diameter (in) Rolling Circumference (ft) Rolling Radius (m)
Front Tires

Rear Tires

Optional Vehicle-Level Inputs (Click to Expand)

Hill Grade Percent (%)

 
 degrees
 
 radians
Speed Requirement for Hillclimb Using % Grade Above (mph)

  kph   m/s
Vertical Distance from CG to Ground (in)

  mm    
Wheelbase (in)

  mm    
Weight Distribution, Front (%)

           
Weight Distribution, Rear (%)

           
Assumed Tire Mu

         
Altitude (ft)

  m    
Air Density (kg/m3)

         
Vehicle Frontal Area (m2)

         
Coefficient of Drag, (Cd)

         

Motor and Inverter Inputs (Click to Expand)

The inputs in gray are auto-filled from the drop down boxes you selected in the Required Vehicle Level Inputs section. Always select those drop downs first, then tweak these values. These values will always be overwritten with default numbers when new selections are made in the Required Vehicle Level Inputs section.

Front   Rear
Motor Maximum Speed (RPM)

 
 Motor Maximum Speed (RPM)

Motor Knee Speed (RPM)

  Motor Knee Speed (RPM)

Motor Power (KW) at Knee Speed
Full Load with Battery Sag

  Motor Power (KW) at Knee Speed
Full Load with Battery Sag

Motor Efficiency (%)

  Motor Efficiency (%)

Motor Torque Constant (Nm/Arms)

  Motor Torque Constant (Nm/Arms)

Motor Maximum Torque (Nm)

  Motor Maximum Torque (Nm)

Inverter Peak Current (A-rms)

  Inverter Peak Current (A-rms)

Inverter Continuous Current (A-rms)

  Inverter Continuous Current (A-rms)

Inverter Peak Power (kW)

  Inverter Peak Power (kW)

Inverter Efficiency (%)

  Inverter Efficiency (%)

Front Gear Ratio (X:1)

  Rear Gear Ratio (X:1)

Vehicle Top Speed Check (mph)

 
 Vehicle Top Speed Check (mph)

Motor/Inverter Combination Max Torque (Nm)

 
 Motor/Inverter Combination Max Torque (Nm)

Motor/Inverter Combination Max Power (kW)

 
 Motor/Inverter Combination Max Power (kW)

Motor Mass (kg)

  Motor Mass (kg)

Inverter Mass (kg)

  Inverter Mass (kg)

Battery Inputs (Click to Expand)

The inputs in gray are auto-filled from the drop down boxes you selected in the Required Vehicle Level Inputs section. Always select those drop downs first, then tweak these values. These values will always be overwritten with default numbers when new selections are made in the Required Vehicle Level Inputs section.

Front   Rear
Cell Maker

 
 Cell Maker

Cell Description

  Cell Description

Size/Format

  Size/Format

Cell Mass (g)

  Cell Mass (g)

Cell Volume (mL)

  Cell Volume (mL)

Cell Rated Capacity (Ah)

  Cell Rated Capacity (Ah)

Max Cell Current (A)

  Max Cell Current (A)

ESR @25C, estimated (ohms)

  ESR @25C, estimated (ohms)

Max Voltage (V)

  Max Voltage (V)

Nom Voltage (V)

  Nom Voltage (V)

Min Voltage (V)

  Min Voltage (V)

Pulse Droop Voltage (V)

  Pulse Droop Voltage (V)

Module's Cell S-Count

  Module's Cell S-Count

Module's Cell P-Count

  Module's Cell P-Count

Module Predicted Volume (L)

  Module Predicted Volume (L)

Shipping ELC (g)

 
 Shipping ELC (g)

ESR-Based Voltage Sag at Max Current (V)

 
 ESR-Based Voltage Sag at Max Current (V)

Battery Module Calculations (Click to Expand)

Front   Rear
Module Cell Count

 
 Module Cell Count

Module Current Lim (A)

 
 Module Current Lim (A)

Module Energy Nom. (kWh)

 
 Module Energy Nom. (kWh)

Est. Module Mass (kg)

 
 Est. Module Mass (kg)

Est. Module Mass (lb)

 
 Est. Module Mass (lb)

Module Voltage Max (V)

 
 Module Voltage Max (V)

Module Voltage Nom (V)

 
 Module Voltage Nom (V)

Module Voltage Min (V)

 
 Module Voltage Min (V)

Module Droop Voltage (V)

 
 Module Droop Voltage (V)

Module Sag Amount (ESR-based)(V)

 
 Module Sag Amount (ESR-based)(V)

Module S/P Factor

 
 Module S/P Factor

Module ESR @ RT (ohms)

 
 Module ESR @ RT (ohms)

Module Cell Mass (kg)

 
 Module Cell Mass (kg)

Module Cell Mass (lb)

 
 Module Cell Mass (lb)

Module Cell Volume (L)

 
 Module Cell Volume (L)

Module Predicted Volume (L)

 
 Module Predicted Volume (L)

Module Power (@Droop, kW)

 
 Module Power (@Droop, kW)

Module Power (@MinV, kW)

 
 Module Power (@MinV, kW)

Module Ampacity (Ah)

 
 Module Ampacity (Ah)

Module Ampacity Check (Ah)

 
 Module Ampacity Check (Ah)

Module ELC (shipping)(grams)

 
 Module ELC (shipping)(grams)

Battery Pack Calculations (Click to Expand)

Front   Rear
Pack S-Count

 
 Pack S-Count

Pack P-Count

 
 Pack P-Count

Number of Modules

 
 Number of Modules

Pack Energy Nom. (kWh)

 
 Pack Energy Nom. (kWh)

Est. Pack Mass (kg)

 
 Est. Pack Mass (kg)

Est. Pack Mass (lb)

 
 Est. Pack Mass (lb)

Pack Current Limit (A)

 
 Pack Current Limit (A)

Pack Power (@ droop, kW)

 
 Pack Power (@ droop, kW)

Pack Power (@ droop, hp)

 
 Pack Power (@ droop, hp)

Pack S/P Factor

 
 Pack S/P Factor

Pack Cell Count

 
 Pack Cell Count

Pack Cell Volume (L)

 
 Pack Cell Volume (L)

Est. Pack Total Volume (L)

 
 Est. Pack Total Volume (L)

Pack Cell Mass (kg)

 
 Pack Cell Mass (kg)

Pack Cell Mass (lb)

 
 Pack Cell Mass (lb)

Pack Ampacity (Ah)

 
 Pack Ampacity (Ah)

Pack Power (@minV, kW)

 
 Pack Power (@minV, kW)

Pack Power (@minV, hp)

 
 Pack Power (@minV, hp)

Pack Voltage Max (V)

 
 Pack Voltage Max (V)

Pack Voltage Nom (V)

 
 Pack Voltage Nom (V)

Pack Droop Voltage (V)

 
 Pack Droop Voltage (V)

Pack Voltage Min (V)

 
 Pack Voltage Min (V)

Pack Sag Amount (ESR-based) (V)

 
 Pack Sag Amount (ESR-based) (V)

Pack kW/kg (Cell Mass Only)

 
 Pack kW/kg (Cell Mass Only)

Pack kWh/kg (Cell Mass Only)

 
 Pack kWh/kg (Cell Mass Only)

Pack kW/L (Based On Est. Module Volume)

 
 Pack kW/L (Based On Est. Module Volume)

Pack KWh/L (Based On Est. Module Volume)

 
 Pack KWh/L (Based On Est. Module Volume)

C-Rate @ Max Current (Method 1)

 
 C-Rate @ Max Current (Method 1)

C-Rate @ Max Current (Method 2)

 
 C-Rate @ Max Current (Method 2)

Gradeability Calculations (Click to Expand)

Hill Grade Percent (%)

Speed Requirement for Hillclimb, Using the Grade % Above (mph)

Speed Requirement for Hillclimb, Using the Grade % Above (kph)

Force Requirement (N) for % Grade Entered Above

Power Requirement (kW) for % Grade and Speed Entered Above

Range Calculations (Click to Expand)

Vehicle Type

Approximate Efficiency (miles/kWh)

Battery Pack (Total) Capacity (kWh)

Approximate Range (mi)

Approximate Range (km)

Charging Calculations (Click to Expand)

Charger Type

Charging Power (kW)

Battery Pack (Total) Capacity (kWh)

Charging Time, 0% to 100% SOC (hours)

Charging Time, 30% to 100% SOC (hours)

Electricity Cost ($/kWh)

Charging Cost, 0% to 100% SOC ($)

Charging Cost, 30% to 100% SOC ($)

Acceleration and 0-60 mph Estimations (Click to Expand)

FWD Contribution   RWD Contribution
Max Theoretical Acceleration Based on Tire Mu and Weight Transfer (g's)

 
 Max Theoretical Acceleration Based on Tire Mu and Weight Transfer (g's)

Total Axle Torque (Nm)

 
 Total Axle Torque (Nm)

Tractive Force (N)

 
 Tractive Force (N)

Acceleration (g's)

 
 Acceleration (g's)

Is There Enough Traction To Support This Acceleration?

 
 Is There Enough Traction To Support This Acceleration?

Combined
Total Acceleration (FWD+RWD) (g's)

Approximate 0-60mph Elapsed Time (sec)

Misc. Calculations (Simplified) (Click to Expand)

Elapsed Time From Velocity Change and Acceleration Rate   Power Required to Achieve a Certain Acceleration at a Certain Speed
Velocity Change (V2-V1) (mph)

 
 Velocity (mph)

Velocity Change (V2-V1) (kph)

  Velocity (kph)

Acceleration Rate (g's)

 
 Acceleration Rate (g's)

Elapsed Time (seconds)

 
 Power (kW)

      Power (hp)

 

Distance Traveled From Elapsed Time and Acceleration Rate   Energy Recovery While Decelerating From a Starting Speed to Zero
Elapsed Time (seconds)

 
 Starting Speed (mph)

Acceleration Rate (g's)

  Starting Speed (kph)

Distance Traveled (ft)

 
 Energy (kJ)

Distance Traveled (m)

 
 Energy (kWh)

Simplified Motor Calculations
DC Voltage (V) (Includes Battery Sag)

Kt (Nm/Arms), Ke (Vrms/(rad/s))

Ke (Vrms/rpm)

Inverter Peak Current (Arms) (Limited by Inverter)

Inverter Peak Power (kW) (Limited By Inverter)

Max BEMF Tolerance (V-LL-pk) (Limited By Inverter)

Overvoltage-Based Speed Limit (rpm) (Based on Inverter Limit)

Knee Speed (rpm)

Peak Torque (Nm) (Based on Inverter Phase Current and Ke)

Motor Power @ Knee (kW)

Lesser of Inverter Power Limit and Motor Knee Power (kW)

V-LL-pk Limit (V) (Basedo n 95% of DC Voltage)

V-LL-rms Limit (V) (Based on 95% of DC Voltage)

Personal Info and Data Export (Click to Expand)

Name ♦

Company

Email ♦

Configuration Name

Notes

Exporting

♦ Please note: Your name and email is required to save your results. Your results will be emailed to the address you provide. Please check your email to ensure you entered the correct email address BEFORE leaving this page.

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Plot: Front Motor Power and Torque (Click to Expand)

There are 0 Front Motors

Plot: Rear Motor Power and Torque (Click to Expand)

There are 0 Rear Motors

Plot: Axle Torque (Click to Expand)

Plot: Vehicle Force (Click to Expand)

Plot: Wheel Power & Battery Limits (Click to Expand)

Plot: Theoretical Acceleration & Traction Limits (Click to Expand)

Plot: Front Battery Capability (Click to Expand)

Plot: Rear Battery Capability (Click to Expand)

© 2020 Cascadia Motion, LLC
All Rights Reserved
by Brock And Jen Fraser April 2020
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