Description
The DALY BMS Li-ion 13S 48V 50A Battery Management System is a protection and balancing board designed for 13S lithium-ion battery packs. It is suitable for battery packs built with compatible Li-ion cells such as 18650, 21700, 36500 cylindrical cells, and suitable prismatic Li-ion cells.
With a 50A continuous discharge rating, this BMS is suitable for a range of higher-power battery applications, including electric bikes, electric skateboards, solar systems, RV applications, power tools, camping equipment, boats, and household energy storage systems.
13S 48V Li-ion Battery Compatibility
This is a fixed 13S BMS configuration, meaning it is designed specifically for a 13-series Li-ion battery pack. It should not be used with LiFePO4, LTO, or other battery chemistries.
For a typical 13S Li-ion pack, the cells are connected in 13 series groups to create a nominal 48V-class battery pack.
Battery Protection Features
The DALY 13S 50A BMS continuously monitors the battery pack and provides several protection functions:
- Overcharge protection to help prevent excessive cell voltage.
- Over-discharge protection to help protect cells from excessive discharge.
- Over-current protection for high-current conditions.
- Short-circuit protection to help protect the battery and BMS from external short circuits.
- Temperature protection during charging and discharging.
- Cell voltage monitoring for individual battery groups.
- Battery balancing to help maintain more consistent cell voltages.
According to the supplied specifications, overcharge detection is set at 4.25 ± 0.05V per cell, while over-discharge detection is 2.7 ± 0.1V.
50A Continuous Discharge Capability
The BMS is rated for a 50A continuous discharge current, with a listed peak current of 150A ± 25A. Its low-resistance power MOSFET design and heat sink help manage heat during higher-current operation.
Built-In Battery Balancing
The BMS includes a cell balancing function with a listed balance detection voltage of 4.18V and a balance current of approximately 30 ± 5mA. Battery balancing helps reduce voltage differences between series-connected cells during charging.
Temperature Protection
The BMS includes temperature protection for charging and discharging. The supplied specifications list a working temperature range of -20°C to 70°C, with additional temperature protection thresholds for charging and discharging.
Reliable Protection Circuit
The DALY BMS uses protective ICs and power MOSFETs to monitor and control the battery pack. The PCB also features a protective conformal coating intended to provide improved resistance against corrosion, moisture, and ESD.
Applications
This 13S 48V 50A Li-ion BMS can be used in compatible battery-pack projects such as:
- Electric bikes and e-bikes
- Electric skateboards
- Solar battery systems
- RV and camping power systems
- Power tools
- Electric boats
- Household energy storage
- DIY 48V Li-ion battery packs
- Other compatible 13S lithium-ion applications
What’s Included
- 1 × DALY 13S 48V 50A Li-ion BMS
- 1 × 14-wire balance/sense cable with connector
- 1 × Instruction manual
Technical Specifications
| Specification | Details |
|---|---|
| Battery Chemistry | Li-ion |
| BMS Configuration | 13S |
| Nominal Battery Class | 48V |
| Continuous Discharge Current | 50A |
| Peak Current | 150A ± 25A |
| Charge Current | 25A |
| Charge Voltage | S × 4.25V |
| Overcharge Detection Voltage | 4.25 ± 0.05V |
| 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 Release Voltage | 3.0 ± 1.0V |
| Overcharge Protection Delay | 1 second |
| Over-discharge Protection Delay | 1 second |
| Over-current Detection Delay | 1 ms |
| Short-circuit Detection Delay | 250 μs |
| Working Current | 100mA |
| Sleep Current | 20μA |
| Working Temperature | -20°C to 70°C |
| Sleeping Temperature | -40°C to 80°C |
| Weight | 5.5 ounces |
| Size | 2.5 × 3.1 × 0.6 inches |
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