21700 Lithium Battery BMS Circuit Board for Power Tools
21700 Lithium Battery BMS Circuit Board for Power Tools
21700 Lithium Battery BMS Board for Power Tools
Keep your power tools running at peak performance with this 21700 Lithium Battery BMS (Battery Management System) Circuit Board. Engineered for compatibility with 21V cordless power tool battery packs, this PCB delivers reliable charge and discharge management in a compact, durable form factor. Whether you're rebuilding a battery pack or replacing a faulty board, this is a dependable solution for DIY enthusiasts and professional tradespeople alike.
Key Features
- Designed for 21700 Cells: Optimized for use with 21700 lithium-ion cells commonly found in 21V cordless power tool battery packs.
- Battery Management System (BMS): Manages charge and discharge cycles, helping to maintain consistent output and extend overall battery pack service life.
- Compact PCB Design: Measures 98 × 60 mm (3.86 × 2.36 in) — a well-proportioned board that fits neatly into standard power tool battery housings.
- Durable Construction: Built on a high-quality PCB substrate engineered to withstand the demands of regular power tool use.
- Wide Compatibility: Suitable for a range of 21V lithium battery packs used in popular cordless power tool systems.
- Easy Integration: Designed for straightforward installation, making battery pack rebuilds and repairs accessible for experienced DIYers and technicians.
Specifications
- Cell Compatibility: 21700 Lithium-Ion
- Voltage: 21V
- Board Dimensions: 98 × 60 mm / 3.86 × 2.36 in
- Material: PCB (Printed Circuit Board)
- Function: Battery Management System (BMS)
Who Is This For?
This BMS circuit board is ideal for hobbyists, electronics repair technicians, and professional tradespeople who need a reliable replacement or upgrade board for their 21V cordless tool battery packs. It's also a great addition to any DIY battery-building project using 21700 lithium cells.
Safety Information
Always follow proper electrical safety practices when working with lithium battery cells and circuit boards. Ensure cells are fully discharged before handling. For guidance on electrical safety best practices, visit the U.S. Consumer Product Safety Commission (CPSC) Lithium Battery Safety page.
Learn more: Printed circuit board
Frequently Asked Questions
Q: What is a BMS circuit board and what does it do in a lithium battery pack?
A: A BMS (Battery Management System) circuit board monitors and manages the charge and discharge of lithium-ion cells within a battery pack. It helps maintain balanced cell voltages, prevents overcharge or over-discharge, and contributes to the overall longevity and consistent performance of the battery pack in cordless power tools.
Q: What are the dimensions of this 21700 lithium battery BMS board?
A: This BMS circuit board measures 98 × 60 mm (3.86 × 2.36 inches), making it well-suited for integration into standard 21V cordless power tool battery housings.
Q: Is this BMS board compatible with my cordless power tool battery pack?
A: This board is designed for use with 21V lithium battery packs that use 21700-format lithium-ion cells. It is compatible with a variety of cordless power tool battery systems. We recommend verifying your existing board's dimensions and cell configuration before purchasing to ensure a proper fit.
Q: Can I install this BMS board myself?
A: Installation requires experience with electronics, soldering, and lithium battery handling. If you are comfortable with battery pack rebuilds and basic electrical work, this board is designed for straightforward integration. If you are unsure, we recommend consulting a qualified electronics technician.