21V 50A Li-Ion BMS Protection Board for Electric Power Tools
21V 50A Li-Ion BMS Protection Board for Electric Power Tools
21V 50A Lithium Battery BMS Protection Board for Electric Power Tools
Keep your power tool battery packs running safely and efficiently with this high-performance 21V 50A Lithium Battery Management System (BMS) Protection Board. Engineered for compatibility with wrenches, angle grinders, and a wide range of electric power tools, this compact PCB module delivers robust multi-layer protection and outstanding current output for demanding applications.
Key Features
- Multi-Layer Protection Circuit: High-precision design guards against overcharge, over-discharge, and short-circuit events — keeping your battery pack and tools safe during every use.
- 50A Peak Instant Current Output: Handles up to 50A of instantaneous start current, making it ideal for high-power tools and equipment with heavy-duty performance demands.
- Wide Power Tool Compatibility: Purpose-built for wrenches, angle grinders, and other cordless electric power tools — easy to install and reliably compatible with standard lithium battery pack configurations.
- Superior Heat Dissipation: Constructed from high-quality PCB material with excellent thermal management properties, ensuring stable long-term operation without overheating.
- Universal 21V Li-Ion Specification: Flexible design adapts to a variety of 21V lithium battery pack setups, making this BMS module widely applicable across different tool platforms.
Specifications
- Voltage: 21V
- Maximum Discharge Current: 50A (instantaneous)
- Material: PCB (Printed Circuit Board)
- Dimensions: 46 × 40 mm (approx. 1.81 × 1.57 in)
- Protection Functions: Overcharge, over-discharge, short-circuit
- Battery Included: No
- Charger Included: No
Package Contents
- 1 × 21V 50A BMS Lithium Battery Protection Board
Made in Mainland China.
Please Note: Product images may not reflect exact size — refer to the dimensions listed above. Minor variations may occur due to manual measurement. Actual color may vary slightly from images depending on your monitor settings.
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Frequently Asked Questions
Q: What voltage and current does this BMS protection board support?
A: This lithium battery BMS protection board is designed for 21V lithium battery packs and supports a maximum instantaneous discharge current of 50A, making it well-suited for high-power cordless electric tools.
Q: What types of power tools is this BMS board compatible with?
A: This 21V BMS module is designed for use with a wide range of cordless electric power tools including wrenches, angle grinders, and other tools that use standard 21V lithium battery packs. Its universal design makes it adaptable to various battery configurations.
Q: Does the protection board include a battery or charger?
A: No — this listing includes only the BMS protection board (PCB module) itself. Batteries and chargers are sold separately.
Q: What protections does this BMS board provide?
A: The board features a high-precision protection circuit that safeguards against overcharge, over-discharge, and short-circuit conditions, helping extend battery life and maintain safe operation during use.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.