Description
The DALY BMS LFP LiFePO4 4S 12V 30A Battery Management System is a fixed 4S protection and balancing board designed specifically for 12V LiFePO4 battery packs. It is suitable for packs made from four 3.2V LiFePO4 cells connected in series.
This 30A LiFePO4 BMS helps manage the battery during charging and discharging while providing important protection against unsafe operating conditions. The built-in cell balancing function helps maintain a more consistent voltage across the connected cells, supporting better battery performance and reliability.
The BMS includes a balance wire and temperature sensor for cell monitoring and temperature protection. With a 30A continuous discharge rating and 90A ± 15A peak current, it can be used in a range of solar, mobility, backup power, and DIY battery applications.
Key Features
- 4S LiFePO4 BMS for 12V-class battery packs.
- 30A Continuous Discharge Current.
- 90A ± 15A Peak Current capability.
- Cell Balancing helps maintain balanced cell voltages.
- 30 ± 5mA Balance Current.
- Balance Wire Included for individual cell voltage sensing.
- Temperature Sensor Included for temperature monitoring.
- Overcharge Protection helps prevent excessive cell voltage.
- Over-Discharge Protection helps prevent deep discharge.
- Overcurrent Protection helps protect the battery from excessive current.
- Short-Circuit Protection disconnects the battery during short-circuit conditions.
- Temperature Protection helps protect the battery under abnormal temperature conditions.
- Compact design for various LiFePO4 battery pack configurations.
Battery Compatibility
This is a fixed 4S LiFePO4 BMS and is designed only for Lithium Iron Phosphate (LiFePO4) battery packs.
Compatible cell formats may include:
- 18650 LiFePO4 cells
- 21700 LiFePO4 cells
- 36500 cylindrical cells
- Other compatible cylindrical cells
- Prismatic LiFePO4 cells
Not suitable for standard Li-ion, Li-Metal, or LTO batteries.
Protection Functions
- Overcharge Protection: Helps stop charging when the cell voltage reaches the protection limit.
- Over-Discharge Protection: Disconnects the battery when cell voltage becomes too low.
- Overcurrent Protection: Helps protect the battery 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 keep individual cells at similar voltage levels.
Applications
- 12V LiFePO4 battery packs
- Solar energy storage 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
- Backup power systems
What You Will Get
- 1 × DALY 4S LiFePO4 30A 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 | 30A |
| Peak Current | 90A ± 15A |
| Main Circuit Resistance | ≤ 20mΩ |
| Charge Voltage | S × 4.25V |
| Charge Current | 15A |
| 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 | 5.5 ounces |
| Dimensions | 2.5 × 3.1 × 0.6 inches |
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