8S 29.6V 18650 Lithium Battery Equalizer Board

8S 29.6V 18650 Lithium Battery Equalizer Board is an essential component for maintaining the health and longevity of your lithium-ion battery packs. As battery cells age or are used, their individual voltages can drift, leading to an unbalanced pack where some cells are overcharged and others are undercharged. This unbalance can reduce the overall capacity and lifespan of the entire battery pack and, in severe cases, pose a safety risk. This equalizer board actively manages the voltage of each cell in an 8S (8-cell series) configuration, ensuring they remain balanced. By moving charge from a higher-voltage cell to a lower-voltage cell, this board helps your battery pack perform optimally and last longer, giving you peace of mind for your projects and applications.

Key Features:

• Active Balancing: Unlike passive balancers that simply bleed off excess energy as heat, this board actively transfers charge between cells, minimizing energy waste and maximizing efficiency.
• Supports 8S Configuration: Specifically designed for battery packs with eight cells connected in series, making it perfect for 29.6V (3.7V nominal per cell) applications.
• Voltage Precision: It maintains a tight balance, ensuring the voltage difference between cells remains minimal, which is crucial for prolonging battery life.
• Low Quiescent Current: The board consumes very little power when in standby mode, so it won’t drain your battery pack when not in use.
• Easy Integration: With clearly marked pads for each cell, wiring this board into your existing battery management system (BMS) is straightforward.

Technical Specifications:

• Number of Cells: 8S (8 series)
• Nominal Voltage: 29.6V (3.7V/cell)
• Maximum Balancing Current: Up to 1.5A
• Balancing Type: Active (charge transfer)
• Balancing Method: Equalizes voltage difference between cells
• Quiescent Current: < 1 mA

Mechanical Specifications:

• Mounting: Includes mounting holes for secure installation.
• Connections: Solder pads or JST-XH connector pins for cell and main battery terminals.
• Material: Durable FR4 PCB with silkscreen labeling.

Dimensions:

• Length: ~60 mm
• Width: ~40 mm
• Thickness: ~1.6 mm

Pinout and Wiring:

• B- : Connect to the negative terminal of the first cell (Cell 1).
• B1 to B8: Connect to the positive terminal of each consecutive cell (B1 to Cell 1+, B2 to Cell 2+, etc.).
• B+ : Connect to the positive terminal of the last cell (Cell 8).
• Wiring Note: Always connect the wires in order from B- to B+ to ensure proper cell detection and balancing. Make sure your battery cells are correctly wired in series before connecting this board.

Datasheet Reference:

• Download Datasheet

Commonly Used in:

• Electric Vehicles (EVs): Maintaining balance in high-voltage battery packs for scooters, bikes, and other small EVs.
• Power Tools: Ensuring a long life for battery packs used in drills, saws, and other cordless tools.
• Robotics and Drones: Providing reliable power and extending the runtime of a device’s power source.

Applications:

• Battery Pack Building: A must-have for anyone building custom 8S lithium-ion battery packs.
• Battery Health Maintenance: Use it to restore balance to older, unbalanced battery packs.
• High-Power Projects: Integrate it into a project where battery longevity and performance are critical.

Equivalent Models:

• 6S/10S Equalizer Boards: Similar boards designed for different cell counts.
• Passive Balancer Boards: Simpler, less efficient alternatives that dissipate excess energy as heat.

Package Includes:

• 1 x 8S 29.6V 18650 Lithium Battery Equalizer Board