BMS 5S 20A Li-ion Battery Protection Board for 18650 Cells
BMS 5S 20A Li-ion Battery Protection Board for 18650 Cells
BMS 5S 20A Lithium Battery Charging Protection Board – 18650 Li-ion Balancer Module
Keep your 18650 lithium battery packs running safely and efficiently with this compact 5S 20A Battery Management System (BMS) Protection Board. Designed for DIY power banks, e-bike packs, and other Li-ion battery projects, this module automatically manages charging and discharging to keep your cells balanced and your build protected — all in a small, easy-to-install form factor.
Key Features
- Multi-Layer Safety Protection: Built-in overcharge, over-discharge, short circuit, and overheating protection circuitry safeguards your battery cells and connected devices from dangerous conditions.
- Cell Balancing: The integrated balancer equalizes voltage across all 5 cells during charging, extending overall pack performance and longevity.
- Extended Battery Life: Precise charge and discharge control prevents damaging voltage extremes, helping your 18650 cells last significantly longer.
- Ultra-Low Standby Current: Low static current draw minimizes energy loss when the battery is idle — a more efficient and eco-friendly design.
- Automatic Adaptation: Intelligently identifies battery status and adjusts charging current and voltage in real time — no manual intervention required.
- Easy Installation: Simply connect the positive and negative battery terminals to the corresponding board contacts. Compact size makes it simple to fit inside your project enclosure.
Specifications
- Configuration: 5S (5 cells in series)
- Maximum Continuous Current: 20A
- Compatible Battery Type: 18650 Li-ion / Lithium battery cells
- Material: PCB with plastic components
- Package Includes: 1 × BMS Protection Board
- Country of Origin: Made in China
What's in the Box?
- 1 × BMS 5S 20A Lithium Battery Protection Board
Note: Color may vary slightly from images due to monitor settings and lighting. Please allow minor measurement deviation for stated dimensions.
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Frequently Asked Questions
Q: What does a 5S BMS protection board do for 18650 lithium batteries?
A: A 5S BMS (Battery Management System) protection board manages a series pack of five 18650 Li-ion cells. It monitors and controls overcharge, over-discharge, short circuit, and overheating conditions, while also balancing cell voltages during charging — helping the entire battery pack perform more safely and consistently over time.
Q: Is this BMS board compatible with DIY power banks and e-bike battery packs?
A: Yes. This 5S 20A BMS protection board is well-suited for a wide range of DIY lithium battery projects including power banks, electric bikes, scooters, and other devices that use 18650 Li-ion cells wired in a 5-series configuration. Always verify your project's voltage and current requirements before installation.
Q: How do I install the BMS 5S protection board?
A: Installation is straightforward — connect the positive and negative terminals of each cell to their corresponding labeled contacts on the board. The module is compact and designed to fit easily within most DIY battery enclosures. No special tools are required for a basic connection.