BMS 3S 40A Lithium Battery Charger Protection
The 3S 40A BMS (Battery Management System) is a high-current protection board designed for 3-cell (3S) lithium battery packs. It provides comprehensive protection against overcharge, over-discharge, overcurrent, and short circuits, ensuring safe battery operation and extending battery life. It is ideal for high-power applications such as electric vehicles, robotics, power tools, and DIY battery packs.
⚙️ Key Features
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Designed for 3S (11.1V / 12.6V) lithium battery packs
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Maximum continuous discharge current: 40A
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Overcharge protection
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Over-discharge protection
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Overcurrent protection
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Short-circuit protection
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High-performance MOSFETs for efficient current handling
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Compact and durable PCB design
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Suitable for high-power battery applications
📦 Technical Specifications
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| Product Type | Battery Management System (BMS) |
| Battery Configuration | 3S (3 Cells in Series) |
| Compatible Battery Types | Li-ion / Li-Po (3.7V per cell) |
| Nominal Battery Voltage | 11.1V |
| Fully Charged Voltage | 12.6V |
| Maximum Continuous Current | 40A |
| Peak Current | 60A (Typical) |
| Overcharge Protection Voltage | 4.25V ± 0.05V per cell |
| Over-discharge Protection Voltage | 2.5V ± 0.1V per cell |
| Overcurrent Protection | Yes |
| Short-Circuit Protection | Yes |
| Operating Temperature | -40°C to +85°C |
