Enerkey 3S/4S 10–80A BMS (Peak 120A) with NTC & Cell Balancing – Li-ion

Enerkey 3S/4S 10–80A BMS (Peak 120A) with NTC & Cell Balancing – Li-ion (NCM)

This Enerkey hardware BMS is designed for DIY battery pack builders who need reliable protection for 3S or 4S Li-ion (NCM / 4.2V per cell) packs in the 12–16.8V range. It provides robust hardware-based protection and onboard cell balancing to help maintain long-term pack health.

⚠️ Chemistry Compatibility Notice:
This BMS is configured for Li-ion (NCM) chemistry only.
Not compatible with LiFePO₄ (LFP), LTO, or sodium-ion (SIB) packs.

The board includes protection against over-charge, over-discharge, over-current, and short-circuit conditions. An NTC temperature sensor input allows thermal monitoring and shutdown if unsafe temperatures are detected.

Key Features

• Supports 3S or 4S Li-ion (NCM) battery packs
• 10–80A continuous discharge capability (model dependent)
• Up to 120A peak current for short bursts
• Integrated cell balancing for voltage equalization
• NTC temperature sensor input for thermal protection
• Hardware protection: over-charge, over-discharge, over-current, short circuit
• Heavy copper current paths for high-current operation
• Multi-color balance / NTC wiring harness included

Typical Applications

• 3S / 4S Li-ion power packs
• High-current DC systems up to 80A continuous
• DIY inverter or tool battery packs (with proper enclosure and wiring)
• RC, robotics, and maker projects

Specifications (Overview)

• Series cells: 3S or 4S
• Chemistry: Li-ion (NCM, 4.2V per cell)
• Continuous current: up to 80A
• Peak current: up to 120A (short duration)
• Protection: over-voltage, under-voltage, over-current, short-circuit, temperature (with NTC)
• Balancing: onboard cell balancing
• Board type: hardware BMS (no Bluetooth / app)

What’s Included

• 1 × Enerkey 3S/4S 10–80A BMS (Peak 120A) board
• 1 × balance / NTC wiring harness

Important Notes

• Cells, wiring, bus bars, and enclosure are not included.
• This is an advanced DIY product. Incorrect wiring or exceeding current ratings can damage the BMS or battery.
• Always fuse your pack appropriately and test with a current-limited power supply on first power-up.

Part of the RenewSpark Enerkey hardware BMS lineup — build smarter, safer Li-ion packs.

—
Download RenewSpark Tools on the iOS App Store — the toolbox I use for battery building.