BMS Digital Twin - v1.1.0 (Vehicle Networking Upgrade)

What's New in v1.1.0

This release upgrades the BMS digital twin from a standalone monitor to a fully networked vehicle component.

• CAN Bus Simulation: Implemented an active broadcasting system (sendCANFrame) that translates physical floating-point telemetry (Voltage, SoC) into standard 8-byte hexadecimal CAN frames.
• Hexadecimal Data Packing: Scaled 0-5V analog readings and 0-100% SoC integrations into single-byte representations (0-255) to maximize bus bandwidth efficiency.
• Network Identifier: Configured default broadcasting on standard battery data ID 0x620.

Wokwi project link

BMS Digital Twin - v1.0.0 (Production Release)

Overview

Initial production release of the Battery Management System (BMS) Digital Twin. This firmware simulates hardware-level telemetry polling, real-time safety cutoffs, and State of Charge (SoC) estimation for a lithium-ion battery pack.

Live Simulation

https://wokwi.com/projects/459317716940232705

Key Features

• Telemetry Engine: Real-time polling of ADC pins for Voltage, Current, and Temperature.
• Hardware Safety Bouncer: Hardcoded Over-Voltage (4.2V) and Under-Voltage (3.0V) limits triggering an instantaneous digital contactor shutdown (Pin 13).
• SoC Estimation: Implemented continuous Coulomb Counting algorithm (integration of current over time) to calculate precise battery percentage dynamically.

Result