Energy Storage Systems

What Does a BMS Actually Do?

A Battery Management System continuously monitors individual cell voltages to detect and correct imbalances, total pack voltage and current, and cell temperatures to prevent thermal runaway. It estimates state of charge and state of health, and detects faults like over-discharge, overcharge, and short circuits — disconnecting the pack upon fault detection to protect equipment.

Balancing Technologies

• Passive Balancing — Dissipates excess energy as heat; simple and cost-effective
• Active Balancing — Transfers energy between cells rather than wasting it, improving efficiency in larger packs

Choosing the Right BMS

Key parameters include cell chemistry (LiFePO4 vs. Li-Ion), number of cells in series, maximum continuous current, peak current capability, communication interface (UART, CAN, RS485, Bluetooth), and active or passive balancing needs.

Application Examples

Backup power systems, off-grid energy systems, and energy storage for commercial facilities.

Featured Brands

Daly, JBD, ANT BMS, REC BMS