EF-006
12S 44.4V 81A Smart UAV Bms for Lithium Polymer UAV battery pack

12S Smart Battery management system designed for powering up Surveying & Mapping Drone Power Line Inspection Drone Polar Expedition Drone

EF-006 Smart BMS Highlights:

Series Configuration: 12S
Nominal Pack Voltage: 44.4V
Constant working current: 81A
Over-discharge current alarm: customized protection logic available
Integrated drone BMS semi conductor and communication module for real-time monitoring of battery level, temperature, and other data. Managed via an app for charge and discharge control, plug-and-play design

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EF-006

Product Introduction

EF-006 smart drone BMS is designed for a 12-series lithium battery pack (NMC, 3.0–4.2V per cell) with charge and discharge sharing a single port. It supports continuous discharging current of 81A.
Temperature monitoring is handled by 3 NTC probes for the battery and 1 for the MOSFET. Communication options comprise isolated 485, UART, and CAN (standard), along with a Bluetooth module (115200 baud, ID:1) and CAN at 1000K baud.
It operates from −20°C to 70°C, and draws ≤10 mA in active mode and ≤50 µA in deep sleep (triggered by cell undervoltage). Pre-discharge and history storage functions are provided as standard.

12S 81A BMS - Compatibility & Key Features

Battery packs compatible with the 12S 81A BMS
12S1P 44.4V 22000mAh Smart UAV Battery 25C 12S1P 44.4V 30000mAh LiPo UAV Battery 25C High Voltage Semi-Solid 12S1P 44.4V 24500mAh UAV Battery Semi-Solid 12S1P 44.4V 26000mAh UAV Battery Semi-Solid 12S1P 44.4V 31000mAh UAV Battery Semi-Solid 12S1P 44.4V 35000mAh UAV Battery High Voltage Semi-Solid 12S1P 44.4V 41000mAh UAV Battery Semi-Solid 12S1P 44.4V 45000mAh UAV Battery High Voltage Semi-Solid 12S1P 44.4V 55000mAh UAV Battery High Voltage Semi-Solid 12S1P 44.4V 67000mAh UAV Battery
EF-006 12S 81A Smart UAV BMS — Compatible Battery Packs
Inspection & Mapping Drone / Surveillance & Patrol Drone / Training Drone / Light Route Mission UAV
Key Features
12S lithium and semi-solid battery packs support	Battery status (Normal / Warning / Fault); HMI
Battery historical data query
Real-time individual cell monitoring	Battery self-heating function
Dual overvoltage protection (cell + pack); undervoltage protection (cell + pack)	Voltage tolerance ≤ ±5mV
Overcurrent protection; short circuit protection; reverse charge protection	Temperature error ≤ ±2°C
Intelligent dynamic balancing	Power calculation error ≤ ±5%

Engineering Capabilities

High-Current UAV Applications

Designed for UAV battery packs with demanding discharge profiles. Continuous and peak-current ratings are specified according to the selected hardware configuration.

Configurable Protection Strategy

Configurable monitoring and protection thresholds for cell voltage, pack current and temperature conditions.

UAV BMS host communication testing for CAN RS485 and DroneCAN integration

Communication Integration

Supports isolated CAN, isolated RS485 and DroneCAN integration, with project-specific protocol configuration available.

Custom UAV BMS engineering and firmware configuration support

OEM / ODM Engineering Support

Customisation support for series configuration, interfaces, firmware parameters, charger communication and battery-pack integration.

EF-006 Technical FAQ

Q: Which battery packs and UAV applications is the EF-006 designed for?

The EF-006 is designed for 12S NMC lithium battery packs with a nominal pack voltage of 44.4V and a 3.0V to 4.2V cell operating range. It is suitable for surveying, mapping, power-line inspection, patrol, training and other industrial UAV applications. Battery chemistry, maximum voltage, connector layout and current demand should be confirmed before production.

Q: What continuous current does the EF-006 support?

The configuration shown on this page supports 81A continuous discharge current. Peak-current demand, cable size, connector selection, cooling conditions and the UAV mission load profile should be reviewed during the engineering evaluation.

Q: Which communication interfaces are available on the EF-006?

The EF-006 provides isolated RS485, UART and CAN communication as standard, with CAN operating at 1000K baud. The Bluetooth module uses 115200 baud with ID 1 for wireless monitoring and parameter access. Interface mapping should be confirmed against the flight controller, charger and ground-station requirements.

Q: How does temperature monitoring work?

Temperature monitoring uses three NTC probes for the battery pack and one probe for the MOSFET. The EF-006 is specified for operation from -20°C to 70°C, allowing the BMS to monitor both cell-pack and power-stage temperature during UAV operation.

Q: What monitoring and protection functions are included?

The BMS monitors individual-cell voltage, pack current, temperature and battery status. It supports cell over-charge and over-discharge protection, current protection, pre-discharge and historical-data storage. The charge and discharge paths share a single port in this configuration.

Q: What are the active-mode and deep-sleep power requirements?

The EF-006 draws no more than 10mA in active mode and no more than 50µA in deep sleep. Deep sleep is triggered by cell undervoltage, helping reduce standby consumption during storage or extended idle periods.

Q: What information is required for an OEM or ODM evaluation?

Please provide the battery chemistry, nominal and maximum voltage, capacity, continuous and peak current, connector and cable requirements, communication protocol, charger interface, installation space and flight-controller requirements. This allows the engineering team to confirm hardware, firmware and integration compatibility.

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Technical Specifications

12S-UAV Smart BMS - Complete Engineering Data Sheet

Swipe left/right to view full specification sheet ↔

Cell-Level Voltage Protection Parameters

Protection Function	Parameter	Min	Typical	Max	Unit
Single-Cell Over-Charge Protection	Over-Charge Voltage Threshold	4.225	4.25	4.275	V
	Over-Charge Delay Time	2	3	4	s
	Over-Charge Recovery Voltage	4.075	4.1	4.125	V
Single-Cell Over-Discharge Protection	Over-Discharge Voltage Threshold	2.975	3.0	3.025	V
	Over-Discharge Delay Time	2	3	4	s
	Over-Discharge Recovery Voltage	3.475	3.5	3.525	V

Current Protection Parameters

Protection Function	Parameter	Min	TYP	Max	Unit
Over-Charge Current Protection	Over-Current Charge Protection Threshold	85	90	95	A
	Over-Current Charge Protection Delay Time	5000			ms
	Over-Current Charge Protection Release	Delay 30 s self-recovery; after 3 consecutive trips, charger must be disconnected to restore
Over-Discharge Current Protection	1st-Level Over-Current Protection Threshold	280	300	320	A
	1st-Level Over-Current Protection Delay Time	400	600	800	ms
	2nd-Level Over-Current Protection Threshold	600	625	650	A
	2nd-Level Over-Current Protection Delay Time	10	20	100	ms
	Over-Current Discharge Release	Delay 30 s self-recovery; after 3 consecutive trips, load must be disconnected to restore

Battery Temperature Protection Parameters

Protection Function	Parameter	Min	Typical	Max	Unit
Charging Temperature Protection	Charging High-Temperature Threshold	53	55	57	°C
	Charging High-Temperature Recovery	43	45	47	°C
	Charging Low-Temperature Threshold	-2	0	2	°C
	Charging Low-Temperature Recovery	1	3	5	°C
Discharging Temperature Protection	Discharging High-Temperature Threshold	73	75	77	°C
	Discharging High-Temperature Recovery	53	55	57	°C
	Discharging Low-Temperature Threshold	-22	-20	-18	°C
	Discharging Low-Temperature Recovery	-12	-10	-7	°C

Total Voltage Protection Parameters

Protection Function	Parameter	Min	Typical	Max	Unit
Total Voltage Over-Charge Protection	Overall Over-Charge Voltage	50.7	51.0	51.3	V
	Overall Over-Charge Delay Time	2	3	4	s
	Overall Over-Charge Recovery Voltage	48.0	49.2	49.5	V
Total Voltage Over-Discharge Protection	Overall Over-Discharge Voltage	35.7	36.0	36.3	V
	Overall Over-Discharge Delay Time	2	3	4	s
	Overall Over-Discharge Recovery Voltage	41.7	42.0	42.3	V

Quick Reference Summary

Specification	Value
Battery Pack Configuration	12S NMC (Lithium/Semi Solid)
Cell Voltage Range	3.0 - 4.2 V
Pack Charging Voltage	50.4 V
Continuous Charging Current	27 A
Continuous Discharging Current	81 A
Charge/Discharge Port	Same port (combined)
Communication	CAN (isolated, 1000K baud), BLE (115200 baud), 485 (isolated), UART (isolated)
Balance Mode	Passive balancing
Operating Temperature Range	-20 °C to 70 °C
Active Current Consumption	< 10 mA
Sleep Current Consumption	≤ 3 mA (BLE active)
Deep Sleep Current Consumption	≤ 50 μA (cell undervoltage)
Dimensions	123.8 × 94.8 × 11 mm (±1 mm)
NTC Probes	3× battery + 1× MOSFET
Pre-Discharge Function	Standard
History Storage	Standard
Bluetooth Module	Standard

Contact an Engineer Download Detailed Specifications

Key Features

Reliable battery management for 12S 44.4V UAV battery packs with 81A continuous discharge, real-time monitoring, and communication integration.

12S 44.4V Lithium Battery Support

Designed for 12S NMC lithium and semi-solid UAV battery packs with a 44.4V nominal voltage and 3.0V-4.2V cell operating range.

81A Continuous Discharge Capability

Supports 81A continuous discharge for surveying, mapping, inspection, patrol, training, and other industrial UAV power systems.

CAN, UART, RS485 and Bluetooth Communication

Provides isolated CAN, isolated RS485, UART, and Bluetooth communication for battery monitoring, parameter access, and UAV system integration.

Real-Time Cell and Pack Monitoring

Monitors individual cell voltage, pack current, battery status, and operating conditions to support safe and stable UAV battery operation.

4-Point Temperature Monitoring

Uses three battery NTC probes and one MOSFET temperature probe to monitor both battery-pack and power-stage temperature.

Configurable Protection Logic

Supports cell over-charge, over-discharge, current protection, temperature protection, and project-specific parameter configuration.

Pre-Discharge and Shared Port Design

Includes pre-discharge as standard and uses a shared charge/discharge port to simplify battery-pack wiring and integration.

Low Standby Power Consumption

Draws ≤10mA in active mode and ≤50µA in deep sleep, helping reduce battery drain during storage or extended idle periods.

Surveying & Mapping Drones

Provides stable battery-status monitoring and configurable protection for aerial surveying, mapping, route planning, and geographic data-collection UAV platforms.

Power Line Inspection Drones

Supports 12S UAV battery packs used in power-line inspection, grid patrol, tower inspection, and long-distance infrastructure monitoring missions.

Surveillance & Patrol Drones

Suitable for security patrol, border monitoring, facility inspection, and outdoor surveillance UAVs that require reliable battery telemetry and fault alerts.

Training UAV Platforms

Designed for 12S training drones that need stable discharge performance, clear battery-status feedback, and reliable protection during repeated flight cycles.

Polar Expedition / Low-Temperature UAVs

Supports UAV battery systems used in cold outdoor environments, with temperature monitoring and configurable protection for low-temperature operating conditions.

Industrial Inspection Drones

Helps manage battery safety and operating status for industrial inspection, environmental monitoring, emergency response, and data-collection drone platforms.

EF-006 UAV BMS ENGINEERING SUPPORT

Configure the EF-006 for Your 12S UAV Battery Pack

Share your 12S battery chemistry, capacity, continuous and peak current, communication interface, charger and installation requirements. Our engineers will evaluate the EF-006 configuration for your UAV battery pack.

12S NMC battery packs with 44.4V nominal voltage
81A continuous discharge configuration
Shared charge and discharge port with pre-discharge
Isolated RS485, UART, CAN and Bluetooth communication
Three battery NTC probes, one MOSFET probe and history storage

Request an EF-006 Technical Proposal

UAV power engineers respond within 12 hours

12S Pack Evaluation / Communication Setup / OEM & ODM Support

EF-00612S 44.4V 81A Smart UAV Bms for Lithium Polymer UAV battery pack