BMS 5S 100A

Description

5S 100A Lithium Battery Management System (BMS)

The 5S 100A BMS is a specialized circuit board designed to manage and protect 5-series (5S) Lithium-ion or Lithium-polymer battery packs. It serves as the “brain” of the battery pack, ensuring safety during charge and discharge cycles by monitoring individual cell voltages and overall pack current.

Technical Specifications

Key Functions & Protections

• Overcharge/Over-discharge Protection: Prevents cells from exceeding safe voltage limits or dropping below critical discharge levels, which significantly extends battery lifespan.

• Cell Balancing: Automatically bleeds off excess charge from high-voltage cells during the charging process, ensuring all cells in the 5S stack remain synchronized.

• Short Circuit & Overcurrent Control: Designed to handle up to 100A of continuous discharge, making it suitable for high-power applications. It will instantly cut power if a short circuit or dangerous current spike is detected.

• Thermal Management: Often integrated with a heatsink to dissipate heat during high-current operation.

Important Installation & Safety Considerations

• Wiring Order (Critical): Always connect the balance wires from the B- terminal (most negative) upward to B1, B2, B3, B4, and finally the most positive terminal (B+). Do not plug or unplug the balance connector while the battery is connected.

• Heat Dissipation: Although rated for 100A, ensure the module has adequate airflow. If you are operating at peak current, the onboard MOSFETs will generate significant heat.

• Not a Charger: This is a protection board, not a charger. You must use a dedicated 5S Lithium charger (typically 21V CC/CV) to safely charge the pack.

• Wire Gauge: Given the 100A rating, use appropriately thick cables (e.g., 8AWG or 10AWG) for the main charge/discharge lines to prevent voltage drops and overheating.