Product Description
Product Description
This 3S/4S Lithium-lon BMS Protection Board is specially designed to protect and balance lithium battery packs used in solar systems, power banks, electric tools, DIY battery projects, and energy storage systems.
Featuring an intelligent battery management system (BMS), the board provides protection against overcharging, over-discharging, excessive current, and short circuits while ensuring balanced charging across all battery cells.
The module supports lithium-ion batteries such as 18650, 26650, and polymer batteries, making it an excellent choice for custom battery pack applications.
Protection Functions
Overcharge protection.
Over-discharge protection.
Overcurrent protection.
Short-circuit protection.
Cell balancing function.
Temperature management through optimized PCB design.
Applications
Suitable for:
DIY battery packs.
Solar energy storage systems.
Electric bicycles and scooters.
Portable power stations.
Backup power systems.
Electric tools and equipment.
Installation Notes
.
Follow the wiring diagram carefully.
Connect the terminals in the correct sequence: OV 4.2V → 8.4V → 12.6V (and 16.8V for 4S systems).
Use copper wires with a minimum cross-sectional area of 3 mm².
• Avoid using nickel strips for high-current applications.
Do not touch the components while soldering.
Never intentionally short-circuit the board.
If the resistor marked "430" becomes excessively hot, inspect the wiring connections immediately.
Important Notice
Recommended battery cells: Sony VTC4, VTC4A, VTC5A, and VTC6.
For best performance, use:
3 high-power batteries rated between 10C-20C, or
Ο
6 batteries rated between 5C-10C.
.
Reduce the load current if heat dissipation is inadequate.
When charging or after spot welding, individual cells exceeding 4.2V may trig the balancing resistor to discharge automaticall is normal operation
