Description
The DALY BMS LFP LiFePO4 24S 72V 20A Battery Management System is designed to protect and manage 24S LiFePO4 battery packs made from 24 cells connected in series. With a 20A continuous discharge current, built-in cell balancing, temperature monitoring, and multiple protection functions, this BMS is suitable for 72V LiFePO4 battery applications.
This is a fixed 24S configuration, so it can only be used with a 24-series-cell battery pack. It is specifically designed for LiFePO4/LFP battery chemistry and should not be used with standard Li-ion, Li-Metal, or LTO batteries.
Key Features
- Designed for 24S 72V LiFePO4 battery packs
- 20A continuous discharge current
- Peak current: 90A ±15A
- Built-in cell balancing
- Balance current: 30 ±5mA
- Includes 25-wire balance/sense cable
- Temperature sensor support
- Overcharge protection
- Over-discharge protection
- Overcurrent protection
- Short-circuit protection
- Temperature protection
- Low-power sleep mode
- Compatible with cylindrical and prismatic LiFePO4 cells
- Supports cell formats such as 18650, 21700, and 36500
- Certifications: ISO, FCC, RoHS, PSE, and CE
Protection Functions
Overcharge Protection: Helps protect individual cells from exceeding the specified voltage during charging.
Over-Discharge Protection: Disconnects the battery when cell voltage drops below the specified protection threshold.
Overcurrent Protection: Helps protect the battery pack from excessive current conditions.
Short-Circuit Protection: Shuts down the battery output when an external short circuit is detected.
Temperature Protection: Provides protection against unsafe charging and discharging temperature conditions.
Applications
This 72V 20A LiFePO4 BMS is suitable for:
- Electric bikes and e-bikes
- Solar energy storage systems
- RV and camping power systems
- Electric skateboards
- Electric boats
- Power tools
- Household energy storage
- DIY LiFePO4 battery packs
- Other 72V LiFePO4 battery applications
Battery Compatibility
- Battery Chemistry: LiFePO4 / LFP only
- Configuration: 24S fixed
- Nominal Pack Voltage: 72V
- Cell Voltage: 3.2V nominal per cell
- Number of Cells: 24 cells in series
- Not compatible with: Li-ion, Li-Metal, or LTO batteries
Specifications
| Specification | Details |
|---|---|
| Battery Type | LiFePO4 / LFP |
| Battery Configuration | 24S |
| Nominal Battery Voltage | 72V |
| Continuous Discharge Current | 20A |
| Peak Current | 90A ±15A |
| Main Circuit Resistance | ≤20mΩ |
| Charge Voltage | S × 3.75V |
| Charge Current | 10A |
| Overcharge Detection Voltage | 3.75 ±0.05V |
| Overcharge Protection Delay | 1 sec |
| 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 Detection Delay | 1 sec |
| Over-Discharge Release Voltage | 2.7 ±0.1V |
| Overcurrent Detection Delay | 1ms |
| Overcurrent Detection Condition | Off load |
| Short-Circuit Detection Delay | 250µs |
| Short-Circuit Protection Condition | Off load |
| Temperature Protection | Charge: below -5°C or above 50°C; Discharge: below 70°C |
| Working Current | 100µA |
| Sleeping Current | 20µA |
| Working Temperature | -20°C to 70°C |
| Sleeping Temperature | -40°C to 80°C |
| Weight | 8 oz |
| Dimensions | 2 × 3 × 0.2 inches |
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