LiFePO4 Battery Management Systems (BMS)

The BMS is the component that turns a stack of cells into a safe, long-lived battery — CMX Battery designs and integrates BMS for 12V/24V/48V LiFePO4 packs with balancing, protection and the communication your system expects.

Overview

A battery management system monitors every series group for voltage and temperature, balances cells so they age together, and disconnects the pack before over-charge, over-discharge, over-current or over-temperature can damage it. CMX Battery supplies BMS for 12V, 24V and 48V LiFePO4 packs — standalone boards for custom builders and integrated units inside our modules — with passive or active balancing and CAN/RS485/Bluetooth communication so your inverter or EMS can see cell-level state. Choosing the right BMS is as important as choosing the cells; we specify it from your pack topology and load.

Key specifications

Specification	Value	Why it matters
Topologies	4S / 8S / 16S (12.8/25.6/51.2V); custom on request	Matches the cell count in series.
Balancing	Passive standard; active for large packs	Keeps series strings level over life.
Protection	Over/under-voltage, over-current, over/under-temp, short	Disconnects before damage.
Communication	CAN, RS485, Bluetooth, dry contact	Talks to inverter, EMS or app.
Current rating	Matched to pack C-rate	Sets the safe continuous/discharge current.

Typical applications

Custom pack builds: Standalone BMS boards for OEMs.
Module integration: BMS inside CMX Battery modules.
ESS with monitoring: CAN/RS485 to inverter or EMS.
Mobile packs: Vibration-rated BMS for vehicles.

How to specify & buying guide

Match the BMS series count to your pack (4S/8S/16S) and its current rating to your peak load.
Choose passive balancing for typical packs; active balancing for large series strings where imbalance is costly.
Specify the communication bus your inverter or EMS uses (CAN/RS485/Bluetooth) so the system is observable.
Confirm the BMS cutoff setpoints align with LiFePO4 (2.5–3.65V per cell), not lead-acid ranges.

Engineering & manufacturing at CMX Battery

CMX Battery designs and builds lithium battery products under one quality system, with cell grading, pack assembly, BMS firmware and testing all in-house. We work from your specification and document every unit for your target market.

Certifications & compliance

UN38.3 — Mandatory lithium battery transport test (altitude, thermal, vibration, shock, external short). Required for any cross-border shipment.
CE — EU declaration of conformity for the applicable directives.
RoHS — Restriction of hazardous substances in the battery and BMS.

Frequently asked questions

Do your modules include a BMS?

Yes — every CMX Battery module ships with an integrated BMS; standalone BMS boards are also available for custom builders.

What communication is supported?

CAN, RS485, Bluetooth and dry contact, depending on the model.

Passive or active balancing?

Passive is standard; active balancing is available for large series strings.

Can the BMS talk to my inverter?

If your inverter supports CAN or RS485 battery comms, we match the protocol.

Request a quote

Send us your voltage, capacity, dimensions, certification target and annual volume. Our engineering team returns a proposal within three working days. Start your RFQ or review our custom pack capabilities.