Description
The DALY BMS Li-ion 13S 48V 30A Battery Management System is designed for 13S lithium-ion battery packs built with 18650, 21700, and other compatible Li-ion cells. It provides essential battery protection and cell-balancing functions to help improve the safety, reliability, and service life of lithium-ion battery packs.
This DALY 13S BMS supports 30A continuous discharge current, a specified 90 ± 15A peak current, and up to 15A charging current. It provides protection against overcharge, over-discharge, over-current, short circuit, and excessive temperature during charging and discharging.
The BMS uses low-resistance power MOSFETs and a heat sink to assist with heat dissipation during operation. Its conformal-coated PCB provides additional resistance against moisture, corrosion, and electrical interference.
Key Features
- 13S fixed configuration for Li-ion battery packs
- Designed for 48V-class lithium-ion battery systems
- 30A continuous discharge current
- 90 ± 15A peak current
- 15A charging current
- Supports 18650 and 21700 Li-ion cells
- Individual cell voltage monitoring
- Built-in cell balancing
- Overcharge protection
- Over-discharge protection
- Over-current protection
- Short-circuit protection
- Charging and discharging temperature protection
- Low power consumption
- Low-resistance power MOSFETs
- Heat sink for improved cooling
- Anti-corrosion conformal PCB coating
- Enhanced moisture resistance
- Suitable for high-power Li-ion battery applications
Li-ion Battery Compatibility
This BMS is specifically designed for a 13S lithium-ion battery configuration. It is a fixed 13S design and should not be used with other series configurations.
Compatible battery cells may include:
- 18650 lithium-ion cells
- 21700 lithium-ion cells
- Compatible cylindrical Li-ion cells
- Compatible Li-ion prismatic cells
Not Suitable For
- LiFePO4 batteries
- LTO batteries
- Li-metal batteries
- Other battery chemistries requiring different protection voltage thresholds
Always confirm the battery chemistry and 13S configuration before installation.
Battery Protection Functions
Overcharge Protection
The BMS monitors individual cell voltage and disconnects charging when the cell voltage reaches the specified overcharge threshold.
- Overcharge detection: 4.25 ± 0.05V
- Protection delay: 1 second
- Release voltage: 4.15 ± 0.05V
This protection helps prevent individual Li-ion cells from being charged beyond their specified voltage.
Over-Discharge Protection
The BMS monitors cell voltage during discharge and disconnects the battery load when a cell reaches the low-voltage protection threshold.
- Over-discharge detection: 2.7 ± 0.1V
- Detection delay: 1 second
- Release voltage: 3.0 ± 1.0V according to the supplied specification
Over-Current Protection
The BMS provides protection against excessive current during battery operation.
- Continuous discharge current: 30A
- Peak current: 90 ± 15A
- Over-current detection delay: 1ms
The actual safe operating current depends on the battery cells, wiring, connectors, busbars, cooling, and complete battery-pack construction.
Short-Circuit Protection
The BMS includes short-circuit protection to help disconnect the battery output when an external load causes a short circuit.
- Short-circuit detection delay: 250µs
- Protection condition: External load short circuit
Temperature Protection
Temperature protection helps protect the battery pack when operating outside the specified temperature limits.
According to the supplied specifications:
- Charging temperature protection: below -5°C or above 50°C
- Discharge protection: 70°C
- Working temperature: -20°C to 70°C
- Sleeping temperature: -40°C to 80°C
Cell Balancing
The DALY BMS includes cell balancing to help maintain more consistent voltage levels between the cells/groups in a 13S battery pack.
- Balance detection voltage: 4.18V
- Balance release voltage: 4.18V
- Balance current: 30 ± 5mA
For reliable battery-pack operation, use cells with similar capacity, internal resistance, age, and condition.
High-Current Design
The BMS uses low-resistance power MOSFETs designed for high-current switching and includes a heat sink to assist with heat dissipation.
The supplied specifications list:
- 30A continuous discharge
- 90 ± 15A peak current
- 15A charge current
- Main circuit resistance: ≤20mΩ
When operating close to the maximum current rating, proper battery cells, wiring, connectors, busbars, fuses, and thermal management are required.
Conformal-Coated PCB
The PCB features a conformal coating designed to provide additional protection against moisture, corrosion, and electrical interference.
For outdoor or humid applications, the complete battery assembly should still be installed in an appropriate protective enclosure. No specific IP waterproof rating is provided in the supplied specifications.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | DALY |
| Battery Chemistry | Li-ion |
| BMS Configuration | 13S |
| Nominal Battery Class | 48V |
| Continuous Discharge Current | 30A |
| Peak Current | 90 ± 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 |
| Over-Current Detection Delay | 1ms |
| Short-Circuit Detection Delay | 250µs |
| Charging Temperature Protection | < -5°C or >50°C |
| Discharge Temperature Protection | <70°C |
| Working Current | 100mA |
| Sleeping Current | 20µA |
| Working Temperature | -20°C to 70°C |
| Sleeping Temperature | -40°C to 80°C |
| Weight | Approx. 5.5 oz |
| Dimensions | Approx. 2.5 × 3.1 × 0.6 inches |
Reviews
There are no reviews yet.