BMU-21S-Firmware/USER/Ref/bmu-18s-firmware

BMU-18S Firmware

This repository contains the Battery Management Unit (BMU) firmware for STM32F103 (18S LFP Configuration).

Project Overview

• Hardware: STM32F103CB, LTC6813 AFE
• Platform: Keil MDK-ARM (uVision5)
• OS: uC/OS-III
• Battery Chemistry: LiFePO4 (LFP)

Features

• Cell Voltage/Temperature monitoring and protection.
• System Over Voltage (SOV) and Under Voltage (SUV) protection.
• Hardware fallback SAFETY_SIGNAL for emergency protection.
• CAN communication protocol for status and parameter management.

Build Instructions

1. Open USER/BMU-18S_APP.uvprojx in Keil uVision5.
2. Build Project (F7).
3. The .hex file will be generated in USER/FLASH/obj/ and automatically converted to .bin.

Recent Modifications

• Fixed SOV/SUV unit mismatch in CAN communication.
• Refined Safety Signal logic with fixed, wider thresholds for hardware fallback.
• Optimized CUV/SUV protection logic to prevent flickering during charging.
• Updated safety thresholds for LFP chemistry (Min Cell Voltage: 2.0V).

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