Description
The DALY BMS LFP LiFePO4 4S 12V 50A Battery Management System is designed to protect and manage 4S LiFePO4 battery packs made from four 3.2V cells. It features a 50A continuous discharge rating, cell balancing, temperature monitoring, and multiple protection functions for safer and more reliable battery pack operation.
This is a fixed 4S configuration, so it is specifically designed for 12V LiFePO4 battery packs and cannot be used with other series configurations. It is also intended for LiFePO4 chemistry only and is not suitable for standard Li-ion, Li-Metal, or LTO batteries.
Key Features
- Designed for 4S 12V LiFePO4 battery packs
- 50A continuous discharge current
- Peak current up to 150A ±25A
- Built-in cell balancing function
- Balance current: 30 ± 5mA
- Includes 5-wire balance/sense cable
- Includes temperature sensor
- Overcharge and over-discharge protection
- Overcurrent protection
- Short-circuit protection
- Temperature protection
- Low-power sleep mode
- Suitable for cylindrical and prismatic LiFePO4 cells
- Compatible with cell formats such as 18650, 21700, and 36500
- Certifications: ISO, FCC, RoHS, PSE, and CE
Protection Functions
Overcharge Protection: Protects individual cells when the voltage rises above the specified protection level.
Over-Discharge Protection: Disconnects the battery when the cell voltage falls below the specified threshold.
Overcurrent Protection: Helps protect the battery pack and BMS from excessive current conditions.
Short-Circuit Protection: The BMS can shut down the battery output when an external short circuit is detected.
Temperature Protection: Provides protection during charging and discharging when temperatures exceed the specified operating limits.
Applications
The DALY 4S 12V 50A LiFePO4 BMS is suitable for a wide range of battery-powered applications, including:
- Solar energy storage systems
- RV and camping power systems
- Electric bicycles
- Electric skateboards
- Portable power systems
- Power tools
- Electric boats
- Lawn and garden equipment
- Household energy storage systems
- DIY LiFePO4 battery packs
Battery Compatibility
- Battery Chemistry: LiFePO4 / LFP only
- Configuration: 4S fixed
- Nominal Pack Voltage: 12V
- Cell Voltage: 3.2V nominal per cell
- Number of Cells: 4 cells in series
- Not compatible with: Li-ion, Li-Metal, or LTO batteries
Specifications
| Specification | Details |
|---|---|
| Battery Type | LiFePO4 / LFP |
| Battery Configuration | 4S |
| Nominal Battery Voltage | 12V |
| Continuous Discharge Current | 50A |
| Peak Current | 150A ±25A |
| Main Circuit Resistance | ≤20mΩ |
| Charge Voltage | S × 4.25V |
| Recommended Charge Current | 25A |
| Overcharge Detection Voltage | 4.25 ± 0.05V |
| Overcharge Protection Delay | 1 sec |
| Overcharge Release Voltage | 4.15 ± 0.05V |
| Balance Detection Voltage | 4.18V |
| Balance Release Voltage | 4.18V |
| Balance Current | 30 ± 5mA |
| Over-Discharge Detection Voltage | 2.7 ± 0.1V |
| Over-Discharge Detection Delay | 1 sec |
| Over-Discharge Release Voltage | 3.0 ± 1.0V |
| Overcurrent Detection Delay | 1ms |
| Short-Circuit Detection Delay | 250µs |
| Working Current | 100µA |
| Sleeping Current | 20µA |
| Working Temperature | -20°C to 70°C |
| Sleeping Temperature | -40°C to 80°C |
| Weight | 5.5 oz |
| Dimensions | 2.5 × 3.1 × 0.6 inches |
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