Description
The DALY BMS Li-ion 7S 24V 20A is a reliable battery management system designed for 7S lithium-ion battery packs made with 3.7V Li-ion cells. It is suitable for battery packs using popular cells such as 18650, 21700, 36500, and compatible Li-ion prismatic cells.
This 7S BMS helps protect your battery pack during charging and discharging by providing over-charge, over-discharge, over-current, short-circuit, and temperature protection. It also includes a balance wire and temperature sensor for better battery pack monitoring and protection.
With a 20A continuous discharge rating and 10A charging current, this DALY BMS is a practical choice for building 24V Li-ion battery packs for electric bikes, power tools, solar projects, portable power systems, and other DIY battery applications.
Key Features
- Designed for 7S 24V Li-ion battery packs
- 20A continuous discharge current
- 10A charging current
- Supports battery packs made with compatible 18650, 21700 and 36500 Li-ion cells
- Built-in cell balancing protection
- Over-charge protection
- Over-discharge protection
- Over-current protection
- Short-circuit protection
- Temperature protection
- Includes 8-wire balance/sense cable
- Compact PCB design
- Suitable for custom lithium-ion battery pack projects
7S Li-ion Battery Pack Protection
The DALY 7S 20A BMS continuously helps protect the connected Li-ion battery pack from common electrical conditions that can affect battery performance and safety.
Over-Charge Protection
The BMS detects excessive cell voltage during charging. The specified over-charge detection voltage is 4.25 ± 0.05V per cell, helping prevent individual Li-ion cells from being charged beyond the specified level.
Over-Discharge Protection
The BMS also protects the battery pack from excessive discharge. The specified over-discharge detection voltage is 2.7 ± 0.05V.
Over-Current Protection
With a 20A continuous discharge rating, the BMS is designed for battery packs where the load current remains within the specified operating range. Over-current protection helps disconnect the battery when excessive current is detected.
Short-Circuit Protection
If a short circuit occurs on the external load, the BMS can shut down the battery output to help protect the battery pack and connected components.
Temperature Protection
The BMS includes temperature protection and has a specified working temperature range of -20°C to 70°C.
Battery Compatibility
This is a fixed 7S Li-ion BMS, meaning it is designed specifically for 7-series lithium-ion battery packs.
It is suitable for compatible Li-ion cells such as:
- 18650 Li-ion cells
- 21700 Li-ion cells
- 36500 cylindrical Li-ion cells
- Compatible Li-ion prismatic cells
Important: This BMS is for Li-ion battery chemistry only. It should not be used with LiFePO4, LTO, Li-metal, or other incompatible battery chemistries.
Applications
The DALY 7S 24V 20A BMS can be used for a variety of DIY and commercial lithium-ion battery projects, including:
- Electric bike battery packs
- Electric skateboards
- Solar battery systems
- RV and camping power systems
- Portable power banks
- Power tools
- Household energy storage projects
- Custom 24V Li-ion battery packs
- DIY battery projects
Technical Specifications
| Specification | Details |
|---|---|
| BMS Type | Li-ion Battery Management System |
| Battery Configuration | 7S |
| Charge Voltage | 24V |
| Continuous Discharge Current | 20A |
| Charge Current | 10A |
| Over-Charge Detection Voltage | 4.25 ± 0.05V |
| Over-Discharge Detection Voltage | 2.7 ± 0.05V |
| Working Temperature | -20°C to 70°C |
| Size (L × W × H) | 59 × 34 × 9mm |
| Balance Cable | 8-wire balance/sense cable |
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