Electronic Spices FHJY
Electronic Spices 4S 20A 14.8V 18650 Li-ion Lithium Battery Protection and Charger BMS Module User Manual
Model: FHJY
1. Introducción
This manual provides essential information for the safe and effective use of the Electronic Spices 4S 20A 14.8V 18650 Li-ion Lithium Battery Protection and Charger BMS Module. This module is designed to manage and protect 4-series (4S) Li-ion battery packs, ensuring their longevity and safe operation. Please read this manual thoroughly before installation and operation.

Figura 1: Frente view of the Electronic Spices 4S 20A BMS Module, showing components and connection points.
2. Características principales
The Electronic Spices 4S 20A BMS Module offers the following protective and management features:
- Vol. De cargatage: 14.8 V CC
- Consumo actual: 20A
- Detección de sobrecarga Voltage: 3.90 V ± 0.25 V por celda
- Vol. de liberación de sobrecargatage: 3.80 V ± 0.05 V por celda
- Volumen de detección de sobredescargatage Rango: 2.0 V ± 0.08 V por celda
- Protección contra cortocircuitos: Automatically disconnects output in case of a short circuit.
- Protección contra la sobretensión: Previene daños por consumo excesivo de corriente.
- Equilibrio celular: Helps maintain equal voltage across all cells in the pack for optimal performance.
3. Configuración y cableado
Proper wiring is crucial for the safe and correct operation of the BMS module. Refer to the diagram below for connection details. Always ensure power is disconnected before making any connections.
- Connect B- to the negative terminal of the first battery cell (B1-).
- Connect B1 to the positive terminal of the first cell and the negative terminal of the second cell.
- Connect B2 to the positive terminal of the second cell and the negative terminal of the third cell.
- Connect B3 to the positive terminal of the third cell and the negative terminal of the fourth cell.
- Connect B+ to the positive terminal of the fourth battery cell (B4+).
- Connect P- to the negative terminal of your load/charger.
- Connect P+ to the positive terminal of your load/charger.
Nota: Ensure all connections are secure and insulated to prevent short circuits. Incorrect wiring can damage the BMS, batteries, or connected devices.

Figura 2: Arriba view of the BMS module, illustrating the various connection pads for battery cells and power output.

Figura 3: Abajo view of the BMS module, showing voltage markings and model number HX-4S-A20 REV 1.1.
4. Instrucciones de funcionamiento
Once properly wired, the BMS module will automatically manage the charging and discharging of your 4S Li-ion battery pack. It provides protection against common battery issues.
- Cargando: Connect a compatible 14.8V (or slightly higher, up to 16.8V for full charge) Li-ion charger to the P+ and P- terminals. The BMS will manage the charging process, preventing overcharge.
- Descarga: Connect your load to the P+ and P- terminals. The BMS will monitor the discharge, preventing over-discharge and overcurrent.
- Activación de protección: If any protection threshold (overcharge, over-discharge, overcurrent, short circuit) is met, the BMS will temporarily cut off the output to protect the batteries.
- Recuperación: Most protection states will automatically reset once the fault condition is removed (e.g., removing the short circuit, connecting a charger after over-discharge).
5. Mantenimiento
The Electronic Spices BMS module is designed for low maintenance. However, following these guidelines can help ensure optimal performance and longevity:
- Inspección regular: Revise periódicamente todas las conexiones del cableado para detectar si están flojas o tienen corrosión.
- Limpieza: Mantenga el módulo libre de polvo, suciedad y humedad. Utilice un paño suave y seco para limpiarlo.
- Condiciones ambientales: Operate the module within its specified temperature and humidity ranges. Avoid extreme temperatures.
- Estado de la batería: Ensure the individual 18650 cells used with the BMS are in good condition and are of similar capacity and internal resistance for best performance.
6. Solución de problemas
If you encounter issues with your BMS module, consider the following troubleshooting steps:
| Problema | Posible causa | Solución |
|---|---|---|
| Sin volumen de salidatage from P+ and P- |
|
|
| El BMS se calienta durante el funcionamiento |
|
|
| Las baterías no se cargan completamente |
|
|
7. Especificaciones
Detailed technical specifications for the Electronic Spices 4S 20A 14.8V 18650 Li-ion Lithium Battery Protection and Charger BMS Module:
- Marca: Electronic Spices
- Número de modelo: FHJY
- Tipo de batería: 4S Li-ion (18650 cells recommended)
- Vol nominaltage: 14.8V (for 4S Li-ion)
- Vol. De cargatage: DC 14.8V (up to 16.8V for full charge)
- Corriente de descarga continua máxima: 20A
- Detección de sobrecarga Voltage: 3.90V ± 0.25V
- Vol. de liberación de sobrecargatage: 3.80V ± 0.05V
- Volumen de detección de sobredescargatage: 2.0V ± 0.08V
- Protección contra cortocircuitos: Sí
- Protección contra la sobretensión: Sí
- Dimensiones: Aproximadamente 13 x 13 x 8 cm (embalado)
- Peso del artículo: 200 g (packaged)
- País natal: India
Nota: The physical dimensions and weight provided are for the packaged product. The module itself is compact.
8. Producto terminadoview Video
Mira este video para tener una idea visualview of the Electronic Spices BMS Module, demonstrating its physical characteristics and potential applications.
Vídeo 1: Un breve resumenview of the Electronic Spices BMS Module, highlighting its compact design and key features for battery management.
9. Garantía y soporte
Specific warranty information for this product is not provided in the available documentation. For technical support or warranty inquiries, please contact Electronic Spices directly through their official channels or the retailer from whom the product was purchased.
Información de contacto del fabricante:
Electronic SpicesMain, Ismailpur Rd, near Gyan Mandir Chowk, F- Block, Jaitpur, New Delhi, Haryana 110044
Teléfono: 8929992403
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.