LAB 01Sem 5–8
Free for everyoneBattery Tech & BMS
NsMp Battery Pack Assembly & Cell Balancing
Size a 3S–16S, 1P–4P pack, wire a smart BMS, and push it until the CHG/DSG-FETs trip.
Learn. Simulate. Engineer.
The Virtual Engineering Lab for the EV Generation.
Explore battery technology, electric powertrains, power electronics, charging protocols and automotive electronics through interactive engineering experiments.
Interactive Virtual Engineering Labs for EV & Core Electrical Technologies
Virtual EV Labs is an interactive virtual engineering laboratory platform designed to make engineering education more practical, accessible and application-oriented.
Explore battery technology, Battery Management Systems, electric vehicle powertrains, power electronics, EV charging protocols, high-voltage safety, battery thermal management and automotive communication through interactive engineering simulations and virtual experiments.
Designed for engineering students, educators, colleges, universities and industry professionals, it brings technical concepts, engineering calculations, system visualisations and simulation-based learning together in one platform.
Free for everyone · no sign-up
Interactive Battery & BMS Simulator: 4S2P Smart BMS Sandbox
Eight 18650 cells — four series groups of two in parallel — already wired to a smart BMS, with a small deliberate imbalance. Pick a chemistry, change the topology, draw current from the P+/P− port, watch passive balancing pull the cells together, and push it into an over-current or under-voltage trip.
Pack: 4S2P NMC, group capacity 5.00 Ah, R0/group 11.0 mΩ
Simulation RUNNING at t = 00:00.0; port device: discharge; load setpoint 0 A; charger CC 2.5 A
Pack voltage 0.00 V; port current 0.00 A (discharging); ΔV n/a
Cells: S1: 4.100 V, SOC 91.7 %, 25.0 °C; S2: 3.400 V, SOC 8.3 %, 25.0 °C; S3: 4.100 V, SOC 91.7 %, 25.0 °C; S4: 4.100 V, SOC 91.7 %, 25.0 °C
BMS: NOT powered (check B− and sense wiring); CHG-FET open; DSG-FET open; OCP threshold 70 A; balancing mode passive; protection bypass off; ambient 25 °C
Active BMS faults: none
Wiring check: no wiring issues reported; sense ok; load path protected
Recent events: none; observations recorded: 0
0 · Pack topology & sizing 4S2P · 8 cells
Cell chemistry
4S
3S16S
Parallel cells per group (M)
Nominal voltage
14.8V
Window UVP–CV
11.2–16.8V
Capacity
5.0Ah
Energy
74.0Wh
Max continuous
40A
Sized for
70A
Main P+/P− leads
8 AWG8.37 mm²
Sense ribbon
24 AWG5 leads
Series interconnect: Copper busbar 1.0 × 12 mmrated 85 A
V = N × 3.7 V · Ah = M × 2.5 Ah · Wh = V × Ah. Each series link carries the full pack current, so strip and leads are sized for the larger of the 2 × 20 A cell rating and the 70 A OCP threshold (chassis-wiring ampacity, short leads).
B · Wiring bench · 4S2P
- 4S series string4/4
- Polarity
- Sense ribbon B−…B+
- Device on P+ / P−
Click or drag pin → pin to run a lead
Electrical rules check
No ERC violations — pack, sense ribbon and P+/P− port are correct.
D · Controls & fault injector
0.0 A
0 AOCP 70.0 A100 A
70.0A
DSG-FET opens 8 ms after
2.5A
CV 4.2 V/cell · ends at C/20
25°C
Simulation
Lab record
E · BMS functional dashboard
Cell monitoring matrix · 4S
ΔV = Vmax − Vmin
—
C1
—
25.0°92%
C2
—
25.0°8%
C3
—
25.0°92%
C4
—
25.0°92%
Sensed via B−…B+ ribbon · cells carry ±2.5 % capacity and charge-efficiency spread, so ΔV drifts with use.
Protection triggers
CHG-FET TRIPPEDDSG-FET TRIPPED
| Trip | Threshold | Live | Delay | Opens | Status | Last response |
|---|---|---|---|---|---|---|
| OVP Over-voltage | > 4.25 V | — | 1000 ms | CHG-FET | ARMED | — |
| UVP Under-voltage | < 2.80 V | — | 1000 ms | DSG-FET | ARMED | — |
| OCP Over-current | > 70.0 A | 0.00 A | 8 ms | DSG-FET | ARMED | — |
| OTP Over-temp | ≥ 60 °C | 25.0 °C | 2000 ms | CHG + DSG | ARMED | — |
Trip event log
No trips yet. Push the load past OCP, charge into OVP or discharge into UVP.
Cell balancing
Bleeds any cell > 15 mV above the lowest, also under load or charge.
Bleeding
0/4
Bleed power
0.00 W
Hottest R
25.0 °C
Each channel dumps V²/33 Ω ≈ 0.53 W as heat (R_th 55 K/W → +29 °C). Switch on the IR view to see the resistors glow.
Educational model: first-order equivalent-circuit cells with illustrative parameters. Values are simulated, not measured.
Laboratory catalogue
Explore Our Nine Engineering Laboratories
All nine laboratories have live workbenches — from battery packs, motor drives and full-vehicle wiring to EV charging, HV safety, thermal management and CAN networks.
LAB 02Sem 5–8
Lab ID requiredEV Powertrain & Motor Drives
BLDC / PMSM Speed-Torque & Dynamometer Mapping
Switch a 6-MOSFET inverter bridge, then drive a BLDC / PMSM motor and recover energy with regen.
LAB 03Sem 4–6
Lab ID requiredPower Electronics & Solar PV
DC-DC Buck/Boost Converter — CCM vs DCM & MPPT
Tune buck, boost and buck-boost converters, then track a PV panel's maximum power point.
LAB 04Sem 1–4
Lab ID requiredBasic Electrical & Analog
Thevenin / Norton Theorems & RLC Resonance
Drag-and-drop DC networks for KVL, KCL, Thevenin and Norton, plus RLC resonance sweeps.
LAB 05Sem 6–8
Lab ID requiredEV Charging Protocols
IEC 61851 Control Pilot (CP/PP) & CCS2 Handshake
Step an EVSE and vehicle through IEC 61851 Control Pilot states, then run an educational CCS2 DC session.
LAB 06Sem 6–8
Lab ID requiredHigh-Voltage Safety & Isolation
Pre-Charge Inrush Resistor Sizing & Ground Fault Analysis
Size a pre-charge resistor, sequence the contactors and find a ground fault with an insulation monitor.
LAB 07Sem 6–8
Lab ID requiredBattery Thermal Management
Liquid Cold Plate vs Air Cooling — Heat Dissipation Analysis
Compare air cooling with a liquid cold plate and see how heat spreads through a battery module.
LAB 08Sem 6–8
Lab ID requiredAutomotive CAN & VCU
CAN 2.0B DBC Decoding & Pedal Plausibility
Build CAN 2.0A/2.0B frames, decode them with a DBC file and check dual-channel pedal plausibility.
LAB 09Sem 5–8
Lab ID requiredEV Assembly & Wiring
2W Harness Build, Power-up & Ride Test
Wire a 2-wheeler from zero — battery, fuse, controller, hub motor, Halls, throttle, brake, DC-DC and display — then power it up, ride it and diagnose faults.
Why Virtual EV Labs
Simulation-based technical learning
Interactive learning
Change a parameter and watch the system respond immediately.
Engineering calculations
Theory values sit next to simulated values with % error.
Dynamic graphs
Scope traces, strip charts and characteristic curves from model output.
Fault-based learning
Miswire a harness, short a pack or trigger shoot-through — safely.
Simulation workspaces
Wiring benches, schematics and instruments built for each domain.
Digital lab records
One-click PDF with circuit, observations, graphs and results.
| Traditional static lab | Virtual EV Labs |
|---|---|
| Fixed apparatus, limited sets per batch | Every student gets their own workbench |
| Faults are dangerous or impossible to show | Over-current, thermal and wiring faults on demand |
| Readings copied by hand | Observations recorded with one click |
| Lab time limited to timetable slots | Repeat experiments any time in a browser |
| Graphs drawn after the session | Live graphs while the experiment runs |
Standards & technical references
Learning reference areas
Modern engineering curriculum
Experiments are mapped to courses and units of a modern engineering curriculum as an educational reference.
NBA outcome-based education
Each lab lists course outcomes so faculty can relate experiments to OBE attainment.
AIS-156
Referenced for battery-safety concepts in EV battery and BMS topics.
ISO 26262
Referenced for functional-safety concepts such as plausibility checks (CAN & VCU lab).
IEC 61851
Referenced for Control Pilot and EVSE states (EV Charging lab).
These are learning references only. Virtual EV Labs does not claim approval, accreditation or certification from any of these bodies or standards.
How it works
From theory to lab report in five steps
- 1Select a lab
- 2Understand the theory
- 3Configure the experiment
- 4Analyse the results
- 5Generate the report
Who it's for
Built for every engineering learner
Students
Practise experiments before and after lab hours and build a record of your work.
Explore laboratoriesFaculty
Demonstrate concepts live in class and set experiments with fault scenarios.
Faculty solutionsColleges & universities
Add EV and electrical laboratories across departments without new hardware.
Campus licensingCorporate / OEM teams
Simulation-based technical learning and assessment for EV engineering teams.
Corporate trainingVirtual labs for engineering colleges
Bring Virtual Engineering Laboratories to Your Campus.
Give every student in a batch their own workbench for EV, battery, power electronics and electrical experiments — mapped to your syllabus.
- Institution-wide access
- Custom curriculum mapping
- Faculty dashboards
- Student progress tracking
- Experiment assignments
- Institutional analytics
- Custom licence plans
- Faculty dashboards, assignments and analytics are being built and will launch with accounts.
Frequently asked questions
Questions about Virtual EV Labs
What is a virtual EV lab?
A virtual EV lab is a browser-based engineering workbench where you configure electric-vehicle systems — battery packs, inverters, motors, converters — and observe how they behave through live calculations, graphs and instruments, without physical hardware.
What is a Battery Management System simulator?
A BMS simulator models a battery pack and the electronics that protect it. In Virtual EV Labs you wire a 3S–16S, 1P–4P lithium-ion pack to a smart BMS, then watch it measure every cell, balance them and open its charge or discharge MOSFET when a voltage, current or temperature limit is crossed.
How does the virtual battery balancing experiment work?
The pack starts with cells at slightly different states of charge. With passive balancing on, the BMS bleeds the highest cells through resistors so the spread between the highest and lowest cell voltage (ΔV) shrinks; with balancing off you can watch the spread grow over charge cycles.
What can students learn in an EV powertrain simulation?
Students switch a three-phase six-MOSFET inverter with sinusoidal PWM, see how dead time prevents shoot-through, and drive a BLDC / PMSM motor model to plot speed–torque, power and efficiency, including how regenerative braking returns energy to the battery.
Do I need to register to use the free sandbox?
No. The 4S2P Battery Pack & Smart BMS sandbox on this page works without an account.
Are the results real measurements?
No. Every value comes from an educational simulation model running in your browser. The models use standard engineering equations with illustrative component values; they are not measurements from physical hardware.