Compact and reliable 14S 52V 40A BMS (Battery Management System) with one C-pin – charging and discharging through the same port. Ideal for 14 series cells (14S) lithium packs such as 18650/21700 (Li-ion), LiPo or LiFePo4 (check voltage limits).
What is it for?
- For electric bikes, scooters, go-karts, DIY power packs.
- 14S (nominal ~51.8V, fully charged ~58.8V Li-ion) for systems up to 40A continuous discharge.
Key benefits
- One C-port: simpler connection – same socket for charging and motor/controller.
- Protections: overload, deep discharge, short circuit, overheating (if equipped with thermosonde).
- Balancing: maintains cell balance, ensuring longer battery life and more uniform capacity.
- Stable current of 40A: sufficient for most 1-2 kW EV projects (check peak current requirements).
How to connect (summary)
- B- → connects directly to the battery minus terminal.
- C- → common point of the charger (-) and controller/motor (-).
- Balancing wires (B1…B14) → are connected to the corresponding cell nodes.
Specifications
- Chemistry: 14S Li-ion/LiPo (check compatibility of LiFePo4 within voltage limits).
- Rated system: 52V (fully charged ~58.8V Li-ion).
- Max. DC discharge: 40A (peak currents according to model datasheet).
- Balancing: passive (typically 30-100 mA, depending on version).
- Protection: over/under voltage, over current, short circuit, temperature* (*if NTC).
- Contacts: B-, C- (common), balancing strip.
- Operating temp.: Frequency -20-60 °C (check sticker/datasheet for specific model).
FAQ
Can I load and drive at the same time?
Technologically, yes, it is possible.
Why is there no P- terminal?
This model has a common C-, so a separate P- is not provided – simplifying installation.
14S BMS, 52V BMS, 40A BMS, shared charge port, C- BMS, e-bike BMS, battery management system.
