6S BMS 10A/20A/30A 22.2V 18650 Li-ion Battery Protection Board
6S BMS 10A/20A/30A 22.2V 18650 Li-ion Battery Protection Board
6S BMS 10A / 20A / 30A 22.2V Li-ion 18650 Battery Management Protection Board
Keep your 6-cell lithium-ion battery packs running safely and efficiently with this compact 6S Battery Management System (BMS). Designed for 22.2V 18650 Li-ion configurations, this module provides robust overcharge, over-discharge, overcurrent, and short-circuit protection — all while maintaining cell balance for maximum battery longevity and performance.
Available in three current ratings — 10A, 20A, and 30A — this BMS is well-suited for DIY battery packs used in speakers, power tools, e-bikes, portable power stations, and other electronics projects.
Key Features
- 6S Configuration: Manages 6 series-connected Li-ion 18650 cells at a nominal 22.2V
- Multiple Current Options: Choose 10A, 20A, or 30A to match your application's load requirements
- Overcharge Protection: Prevents individual cells from exceeding safe voltage limits
- Over-Discharge Protection: Cuts off the circuit before cells drop to damaging low voltages
- Overcurrent & Short-Circuit Protection: Immediately disconnects under fault conditions
- Cell Balancing: Actively balances cell voltages for uniform charging and extended pack life
- Temperature Control Protection: Built-in thermal monitoring shuts down the board if unsafe temperatures are detected
- Wide Operating Temperature: Rated from -40°C to +80°C for reliable use in demanding environments
- Compact SMD Design: Surface-mount construction keeps the board small and easy to integrate
- No High-Concern Chemicals: Manufactured without restricted substances
Specifications
| Configuration | 6S (6 cells in series) |
| Nominal Voltage | 22.2V |
| Current Options | 10A / 20A / 30A |
| Compatible Cells | Li-ion / 18650 |
| Package Type | SMD Module |
| Operating Temperature | -40°C to +80°C |
| Quantity | 1 piece |
| Country of Origin | Made in China |
Typical Applications
- Portable speakers and audio equipment
- DIY 18650 battery packs
- Power tools and cordless devices
- Portable power stations and solar storage
- RC vehicles and robotics
- E-bikes and electric scooters
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Learn more: ENERGY STAR product efficiency guidance
Frequently Asked Questions
Q: What does a 6S BMS do for a Li-ion 18650 battery pack?
A: A 6S Battery Management System (BMS) monitors and protects each of the 6 series-connected Li-ion cells in your 22.2V battery pack. It prevents overcharging, over-discharging, overcurrent events, and short circuits, while also balancing cell voltages to extend overall pack life and maintain consistent performance.
Q: Which current rating — 10A, 20A, or 30A — should I choose?
A: Select your current rating based on the maximum continuous discharge current your application requires. For low-power devices like small speakers, 10A is typically sufficient. For power tools, e-bikes, or higher-drain applications, choose the 20A or 30A version to handle the increased load safely.
Q: Does this BMS support cell balancing?
A: Yes. This 6S BMS includes built-in cell balancing functionality, which equalizes the voltage across all 6 cells during charging. This prevents individual cells from becoming over- or under-charged, maximizing the capacity and lifespan of your entire battery pack.
Q: Is this board compatible with standard 18650 Li-ion cells?
A: Yes, this BMS is designed specifically for standard Li-ion 18650 cells arranged in a 6-series configuration (6S). Ensure your total nominal pack voltage matches the 22.2V (6 × 3.7V) specification for proper operation.