Description
The DALY BMS Li-ion 6S 24V 40A Battery Management System is a dedicated protection and balancing board for 6S lithium-ion battery packs with a nominal voltage of 24V. It is designed to monitor and protect compatible Li-ion cells during charging and discharging.
The BMS provides several important protection functions, including overcharge protection, over-discharge protection, over-current protection, short-circuit protection, and temperature protection. These features help protect the battery pack during normal operation and demanding applications.
With a 40A continuous discharge current and a 120A ±20A peak current rating, this BMS can be used for a range of medium-current Li-ion battery projects.
6S Fixed Configuration
This is a 6S fixed-configuration BMS. It is specifically designed for battery packs consisting of 6 Li-ion cells or cell groups connected in series.
It is intended for Li-ion batteries only and should not be used with:
- LiFePO4 batteries
- Li-Metal batteries
- LTO batteries
- Other lithium battery chemistries requiring different protection parameters
Always confirm your battery chemistry and 6S configuration before installation.
Overcharge and Over-discharge Protection
The BMS monitors individual cell voltage to help protect the battery pack from unsafe voltage conditions.
- Overcharge detection: 4.25 ± 0.05V per cell
- Overcharge release: 4.15 ± 0.05V
- Over-discharge detection: 2.7 ± 0.1V
- Over-discharge release: 3.0 ± 1.0V
These protection functions help prevent individual cells from being charged or discharged beyond the specified limits.
Cell Balancing
The DALY 6S 24V 40A BMS includes a built-in balancing function for maintaining better voltage consistency between the cells in the battery pack.
- Balance detection voltage: 4.18V
- Balance release voltage: 4.18V
- Balance current: 30 ± 5mA
A balanced battery pack can help maintain more consistent cell performance during charging and operation.
Over-current and Short-circuit Protection
The BMS is designed to protect the battery pack against excessive current conditions. The specified over-current detection delay is 1ms.
It also includes short-circuit protection with a detection delay of approximately 250μs. When an external short circuit is detected, the BMS can disconnect the battery output to help protect the cells and connected equipment.
Temperature Protection
Temperature protection is included for both charging and discharging.
The specified charging protection limits are:
- Charging temperature: below -5°C or above 50°C
- Discharge protection: above 70°C
- Working temperature: -20°C to 70°C
- Sleeping temperature: -40°C to 80°C
Compatible Battery Cells
This BMS is designed for compatible Li-ion battery cells, including:
- 18650 cylindrical cells
- 21700 cylindrical cells
- 36500 cylindrical cells
- Compatible prismatic Li-ion cells
The battery pack must be configured as 6S for this BMS.
Applications
The DALY 6S 24V 40A Li-ion BMS can be used in various battery-powered applications, including:
- Electric bikes and e-bike battery packs
- Electric skateboards
- Solar battery systems
- RV power systems
- Camping boats
- Power tools
- Lawn equipment
- Household energy storage
- DIY Li-ion battery packs
- Custom lithium battery projects
Key Features
- DALY 6S 24V 40A Li-ion BMS
- 40A continuous discharge current
- 120A ±20A peak current
- Designed specifically for 6S Li-ion battery packs
- Built-in cell balancing
- Overcharge protection
- Over-discharge protection
- Over-current protection
- Short-circuit protection
- Temperature protection
- Suitable for 18650, 21700, 36500 and compatible Li-ion cells
- Includes 7-wire balance/sense cable with connector
- Instruction manual included
- Product listing specifies ISO, FCC, RoHS, PSE and CE approval claims
What You Get
- 1 × DALY 6S 24V 40A Li-ion BMS
- 1 × 7-wire balance/sense cable with connector
- 1 × Instruction manual
Technical Specifications
| Specification | Details |
|---|---|
| Brand | DALY |
| Battery Type | Li-ion |
| Configuration | 6S |
| Nominal Voltage | 24V |
| Continuous Discharge Current | 40A |
| Peak Current | 120A ±20A |
| Main Circuit Inner Resistance | ≤20mΩ |
| Charge Voltage | S × 4.25V |
| Charge Current | 20A |
| 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 Detection Delay | 1 second |
| Over-discharge Release Voltage | 3.0 ± 1.0V |
| Over-current Detection Delay | 1ms |
| Over-current Detection Voltage | Off load |
| Short-circuit Protection Condition | Short circuit external load |
| Short-circuit Detection Delay | 250μs |
| Short-circuit Protection Relay Condition | Off load |
| Charging Temperature Protection | Below -5°C or above 50°C |
| Discharge Temperature Protection | Above 70°C |
| Working Current | 100mA |
| Sleeping 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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