Description
The DALY BMS LFP LiFePO4 4S 12V 20A Battery Management System is a compact protection and balancing board designed specifically for 4S LiFePO4 battery packs. It is suitable for battery packs made from four 3.2V LiFePO4 cells connected in series, providing dependable protection during charging and discharging.
This 12V 20A LiFePO4 BMS includes a balance wire and temperature sensor to help monitor individual cells and protect the battery pack against unsafe operating conditions. The built-in balancing function helps maintain more consistent cell voltages, supporting better battery performance and service life.
The BMS provides protection against overcharging, over-discharging, overcurrent, short circuits, and excessive temperature. It supports a continuous discharge current of 20A and a peak current of 60A ± 10A, making it suitable for a variety of small and medium-power battery applications.
Key Features
- 4S LiFePO4 BMS designed for 12V-class battery packs.
- 20A Continuous Discharge Current.
- 60A ± 10A Peak Current capability.
- Cell Balancing helps maintain balanced battery cells.
- 30 ± 5mA Balance Current.
- Balance Wire Included for cell voltage sensing.
- Temperature Sensor for battery temperature monitoring.
- Overcharge Protection helps prevent excessive cell voltage.
- Over-Discharge Protection helps protect cells from deep discharge.
- Overcurrent Protection helps protect the battery from excessive current.
- Short-Circuit Protection disconnects the battery during short-circuit conditions.
- Temperature Protection helps safeguard the battery during abnormal temperature conditions.
- Compact design suitable for DIY and professional LiFePO4 battery packs.
Battery Compatibility
This is a fixed 4S LiFePO4 BMS and is designed specifically for LiFePO4 (Lithium Iron Phosphate) battery packs.
It can be used with compatible LiFePO4 cell formats, including:
- 18650 LiFePO4 cells
- 21700 LiFePO4 cells
- Cylindrical LiFePO4 cells
- Prismatic LiFePO4 cells
Not compatible with standard Li-ion, Li-Metal, or LTO batteries.
Protection Functions
- Overcharge Protection: Helps stop charging when the cell voltage reaches the configured limit.
- Over-Discharge Protection: Disconnects the battery when cell voltage becomes too low.
- Overcurrent Protection: Protects against excessive discharge current.
- Short-Circuit Protection: Provides rapid protection when a short circuit is detected.
- Temperature Protection: Monitors temperature during charging and discharging.
- Cell Balancing: Helps maintain consistent voltage between individual cells.
Applications
- 12V LiFePO4 battery packs
- Solar power systems
- RV and camping power systems
- Electric bicycles
- Electric skateboards
- Camping boats
- Power tools
- Lawn and garden equipment
- Household energy storage
- DIY LiFePO4 battery packs
What You Will Get
- 1 × DALY 4S LiFePO4 20A BMS
- 1 × 5-wire balance sensing cable with connector
- 1 × Instruction manual
Specifications
| Specification | Details |
|---|---|
| Brand | DALY |
| BMS Type | LiFePO4 Battery Management System |
| Battery Chemistry | LiFePO4 |
| Series Configuration | 4S |
| Battery System | 12V |
| Continuous Discharge Current | 20A |
| Peak Current | 60A ± 10A |
| Main Circuit Resistance | ≤ 20mΩ |
| Charge Voltage | S × 4.25V |
| Charge Current | 10A |
| Overcharge Detection Voltage | 4.25 ± 0.05V |
| Overcharge Protection Delay | 1 second |
| 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 Protection Delay | 1 second |
| Over-Discharge Release Voltage | 3.0 ± 1.0V |
| Overcurrent Detection Delay | 1ms |
| Short-Circuit Detection Delay | 250µs |
| Working Current | 100µA |
| Sleeping Current | 20µA |
| Charging Temperature Protection | Below -5°C or above 50°C |
| Discharging Temperature Protection | Above 70°C |
| Working Temperature | -20°C to 70°C |
| Sleeping Temperature | -40°C to 80°C |
| Weight | 1.1 ounces |
| Dimensions | 1.4 × 2.2 × 0.2 inches |
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