Overview
The 3S 20A BMS is designed for lithium-ion battery packs consisting of three cells in series. This board balances the charge across all three cells and acts as a guardian, disconnecting the load if the voltage goes too high, too low, or if a short circuit is detected. It is the perfect choice for upgrading DIY power tools or creating custom 12V DC power stations.
Key Features
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Comprehensive Protection: Safeguards against over-voltage, under-voltage, over-current, and short circuits.
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Balanced Charging: Ensures all three cells charge evenly, preventing individual cell degradation.
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Continuous Current: Rated for up to 20A, suitable for most small-to-medium power tools and 12V appliances.
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Compact Design: Fits easily inside custom battery packs or 3D-printed enclosures.
Technical Specifications
| Feature | Specification |
| Number of Cells | 3S (3 Cells in Series) |
| Max Continuous Current | 20A |
| Overcharge Voltage | 4.25V ± 0.05V |
| Over-discharge Voltage | 2.45V ± 0.1V |
| Charging Voltage | 12.6V – 13.5V |
| Balanced Version? | Yes (Typically includes balancing) |
Ideal Applications
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Cordless Power Tools: Repairing or building battery packs for drills and drivers.
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12V Portable Power: Powering LEDs, fans, or routers during load shedding.
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Solar Systems: Building small 12V storage banks for low-power solar setups.
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DIY Robotics: Stable power supply for high-current motor-driven robots.
| Weight | 2000 kg |
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| Dimensions | 22 × 16 × 10 cm |
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