Description
A 3S 18650 Lithium Battery Protection Board acts as a Battery Management System (BMS) for a series of three 18650 cells, providing essential safety and performance features, including overcharge, over-discharge, overcurrent, and short-circuit protection, as well as balance charging to ensure uniform cell voltage and enhance battery pack longevity
Features
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3-Cell (3S) Configuration
Designed for three lithium-ion cells connected in series, creating a battery pack with a nominal voltage of 11.1V to 12V.
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Overcharge Protection
Prevents cells from being overcharged by cutting off the charging current at a safe voltage threshold, typically around 4.25V ± 0.05V per cell.
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Over-Discharge Protection
Protects the cells from damage by stopping the discharge process if the voltage drops below a predetermined safe level.
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Overcurrent Protection
Safeguards the battery pack and connected devices from excessive power draw by limiting the current.
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Short-Circuit Protection
Prevents damage to the battery and system caused by accidental short circuits.
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Balance Charging
Ensures that each cell in the series is charged to a similar voltage level, which is crucial for optimizing the overall performance and lifespan of the battery pack.
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Compact and Lightweight Design
Its small size and light weight make it ideal for portable devices and DIY projects, allowing for easy integration into battery packs.
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Auto-Recovery
Some boards feature an automatic recovery function for issues like short circuits, allowing the battery to return to normal operation after the fault is cleared.
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Low Standby Current
Minimizes power consumption when the battery pack is not in use, improving overall efficiency
Specification
- Maximum discharge current: 10A
- Overcharge detection voltage: 4.25-4.35V±0.05V
- Over-discharge detection voltage: 2.3-3.0V±0.05V
- Maximum working current: 5A-8A
- Transient current: 9A-10A
- Operating temperature: -40~50℃
- Storage temperature: -40~80℃
- Quiescent current: ＜6uA
- Internal resistance: ＜60mΩ
- Service life: ＞30,000 hours
Dimension
- 50x16x1mm