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24V 6S 40A Li-Ion Lithium Battery BMS Protection Board with Cell Balancing — E-Bike, Scooter, Solar
24V 6S 40A Li-Ion Lithium Battery BMS Protection Board with Cell Balancing E-Bike, Scooter, Solar
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24V 6S 40A Li-Ion BMS Protection Board with Cell Balancing
A high-current 6-series (6S) Battery Management System (BMS) designed for 24V lithium-ion battery packs. Rated at 40A continuous discharge current, this BMS provides comprehensive protection including overcharge, over-discharge, overcurrent, and short-circuit protection, plus passive cell balancing to equalize cell voltages and extend pack life. Ideal for e-bike, electric scooter, solar energy storage, and DIY lithium battery pack applications.
Key Specifications
| Parameter | Value |
|---|---|
| Configuration | 6S (6 cells in series) |
| Nominal Pack Voltage | 24V (6 × 3.7V Li-ion) |
| Full Charge Voltage | 25.2V (6 × 4.2V) |
| Continuous Discharge Current | 40A |
| Overcharge Protection | 4.25V ± 0.05V per cell |
| Over-Discharge Protection | 2.5V ± 0.1V per cell |
| Overcurrent Protection | ~80–100A (trip threshold) |
| Short-Circuit Protection | Yes (auto-recovery) |
| Cell Balancing | Passive balancing (during charging) |
| Operating Temperature | -30°C to +80°C |
| Origin | Mainland China |
Why Choose This 6S BMS?
- 40A continuous rating — handles e-bike and scooter motor loads without derating
- Cell balancing — passive balancing equalizes cell voltages during charging for longer pack life
- Full protection suite — overcharge, over-discharge, overcurrent, and short-circuit in one board
- Auto-recovery — short-circuit protection resets automatically after fault clearance
- -30°C to +80°C — suitable for outdoor e-bike and solar applications
- Compact module — easy integration into custom battery pack enclosures
Typical Applications
- E-bike battery pack — 24V 40A BMS for electric bicycle lithium battery management
- Electric scooter — protect 6S Li-ion pack from overcharge and over-discharge
- Solar energy storage — 24V lithium battery bank for off-grid solar systems
- DIY power tool battery — replace NiMH packs with 24V Li-ion + BMS
- Portable power station — 24V lithium pack with full BMS protection
- Solar lighting — 24V battery management for outdoor solar LED systems
Wiring Guide
Connect B- to battery pack negative, B1–B5 to cell balance taps (between each cell), and P- to load/charger negative. The C- port (if present) is the charger-only negative for separate charge/discharge paths. Always verify wiring against the BMS datasheet before connecting cells.
FAQ
Q: Is this BMS compatible with LiFePO4 batteries?
A: No. This BMS is calibrated for Li-ion chemistry (4.2V/cell overcharge, 2.5V/cell over-discharge). LiFePO4 requires different thresholds (3.65V/cell charge, 2.5V/cell discharge).
Q: Can I use this BMS for a 24V 20Ah e-bike battery?
A: Yes, as long as your motor controller draws no more than 40A continuous. For higher current applications, choose a 60A or 80A BMS.
Q: Does the BMS support regenerative braking?
A: Passive BMS boards generally support regenerative charging through the discharge port. Verify with your specific motor controller’s regen current level.
Package Contents
- 1× 24V 6S 40A Li-Ion BMS Protection Board with Cell Balancing
