Description
The DALY BMS LFP LiFePO4 4S 12V 100A Battery Management System is a high-current battery protection and balancing board designed specifically for 4S LiFePO4 battery packs. It is suitable for battery packs built from four 3.2V LiFePO4 cells connected in series, providing reliable management during charging and discharging.
With a 100A continuous discharge rating and 300 ± 50A peak current capability, this DALY BMS is suitable for high-power 12V LiFePO4 battery applications. The built-in balancing function helps maintain consistent voltage between individual cells, while the included balance sensing cable and temperature sensor provide additional monitoring and protection.
The BMS includes protection against overcharging, over-discharging, overcurrent, short circuits, and excessive temperature. Its robust design makes it suitable for solar power systems, RVs, electric vehicles, power tools, and other high-current energy storage applications.
Key Features
- 4S LiFePO4 BMS designed for 12V-class battery packs.
- 100A Continuous Discharge Current for high-power applications.
- 300 ± 50A Peak Current capability.
- Cell Balancing helps maintain balanced voltage between cells.
- 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 battery discharge.
- Overcurrent Protection helps protect against excessive current.
- Short-Circuit Protection provides protection during short-circuit conditions.
- Temperature Protection helps safeguard the battery under abnormal temperature conditions.
- Suitable for high-current LiFePO4 battery pack applications.
Battery Compatibility
This is a fixed 4S LiFePO4 BMS and is designed specifically for Lithium Iron Phosphate (LiFePO4) battery packs.
It can be used with compatible:
- 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 cell voltage reaches the configured protection limit.
- Over-Discharge Protection: Disconnects the battery when cell voltage becomes too low.
- Overcurrent Protection: Helps protect the battery from excessive discharge current.
- Short-Circuit Protection: Disconnects the battery when a short circuit is detected.
- Temperature Protection: Monitors temperature during charging and discharging.
- Cell Balancing: Helps keep individual cells at similar voltage levels for better battery performance.
Applications
- 12V LiFePO4 battery packs
- Solar energy storage systems
- RV and camping power systems
- Electric bicycles
- Electric skateboards
- Electric vehicles
- Power tools
- Camping boats
- Lawn and garden equipment
- Household energy storage
- High-current backup power systems
- DIY LiFePO4 battery packs
What You Will Get
- 1 × DALY 4S LiFePO4 100A 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 | 100A |
| Peak Current | 300 ± 50A |
| Main Circuit Resistance | ≤ 20mΩ |
| Charge Voltage | S × 3.75V |
| Charge Current | 50A |
| Overcharge Detection Voltage | 3.75 ± 0.05V |
| Overcharge Protection Delay | 1S |
| Overcharge Release Voltage | 3.65 ± 0.05V |
| Balance Detection Voltage | 3.5V |
| Balance Release Voltage | 3.5V |
| Balance Current | 30 ± 5mA |
| Over-Discharge Detection Voltage | 2.7 ± 0.1V |
| Over-Discharge Protection Delay | 1S |
| Over-Discharge Release Voltage | 2.7 ± 0.1V |
| 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 lb |
| Dimensions | 6 × 2.5 × 0.8 inches |
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