3S BMS – 20A Li-ion Battery Protection BMS Board for 3.7V NMC Cells: Description
A 3S BMS – 20A Li-ion Battery Protection Board designed for 3.7V NMC (Nickel Manganese Cobalt) cells is an essential electronic module used to manage and protect the performance of lithium-ion battery packs. It ensures that the pack operates safely by monitoring key parameters such as voltage, current, and temperature. This BMS is suitable for battery packs configured with 3 cells connected in series, making it ideal for a variety of high-performance applications.
Key Features:
- 3S Configuration (3 Cells in Series):
- The 3S BMS is designed for 3 cells connected in series. This results in a nominal pack voltage of 11.1V (3.7V x 3 cells) and a fully charged voltage of 12.6V (4.2V x 3 cells).
- A 3S configuration is ideal for moderate voltage applications such as drones, e-bikes, power tools, and energy storage systems.
- 20A Continuous Discharge Current:
- The BMS is rated for a continuous discharge current of up to 20A, meaning it can safely supply up to 20A of current to the connected load (e.g., motor, appliance, etc.) without overheating or damaging the battery pack.
- Suitable for applications where high discharge currents are required but the 40A models might be overkill, providing an optimal balance between power handling and efficiency.
- Overvoltage Protection:
- The BMS prevents overcharging by disconnecting the charger when any individual cell exceeds the maximum safe voltage (typically 4.2V). This ensures that the battery pack is not damaged by excessive charging voltage.
- Undervoltage Protection:
- It also provides undervoltage protection by disconnecting the load if any of the cells drop below their safe discharge voltage (typically 3.0V per cell). This prevents deep discharge that could cause permanent damage to the cells.
- Overcurrent Protection:
- The BMS is equipped with overcurrent protection, which prevents excessive current from being drawn from the battery pack. If the current exceeds the 20A threshold, the system will disconnect the load to prevent damage to the cells and other components.
- Short Circuit Protection:
- If a short circuit is detected in the battery pack or connected load, the BMS will immediately cut off the power, preventing damage to the cells, wiring, and connected devices.
- Overtemperature Protection:
- The BMS has built-in temperature monitoring features. If the temperature of the battery pack exceeds safe limits (typically around 60°C or higher), the system will disconnect the load or charger to avoid thermal runaway and potential safety hazards.
- Cell Balancing:
- Cell balancing ensures that the individual cells maintain a similar voltage level. If one cell’s voltage is higher than the others, the BMS will balance the cells to ensure that they charge and discharge uniformly, maximizing battery lifespan and performance.
- This can be achieved via passive balancing, where excess charge is dissipated as heat through resistors, or active balancing (if supported), where charge is redistributed between cells.window.__oai_logHTML?window.__oai_logHTML():window.__oai_SSR_HTML=window.__oai_SSR_HTML||Date.now();requestAnimationFrame((function(){window.__oai_logTTI?window.__oai_logTTI():window.__oai_SSR_TTI=window.__oai_SSR_TTI||Date.now()}))
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