SPIDER Automation | 4S 14.8V 15A Li-ion Battery Protection Board with Cell Balancing
The SPIDER Automation 4S Lithium-Ion Battery Management System (BMS) is designed for rechargeable battery packs containing four series-connected lithium-ion cell groups. It combines battery protection functions with cell voltage balancing to support more consistent operation across the assembled battery pack.
The board incorporates electronic protection for charging, discharging and abnormal current conditions. Its automatic recovery design restores operation after the relevant protection condition has cleared. The PCB is intended for integration into custom battery assemblies using solder-type electrical connections.
Technical Features & Protection Functions
- Overcharge Protection: Monitors individual cell-group voltage and interrupts charging when the specified protection threshold is reached.
- Over-Discharge Protection: Helps prevent excessive battery discharge by disconnecting the load under low-voltage conditions.
- Overcurrent Protection: Detects excessive current conditions and interrupts the protected circuit.
- Short-Circuit Protection: Provides a protective response when a short circuit is detected at the output.
- Cell Voltage Balancing: Helps reduce voltage differences between series-connected cell groups during charging.
- Automatic Recovery: Allows the protection circuit to restore operation after the triggering condition has been cleared.
- Thermal Management: Supports higher working-current operation when suitable additional heat dissipation is provided.
4S Battery Configuration & Electrical Operation
This board is designed for a 4S lithium-ion battery configuration, consisting of four cell groups connected in series. Each group may contain one or more compatible cells connected in parallel, depending on the required battery capacity.
For conventional 3.7V nominal lithium-ion cells, a 4S pack has a nominal voltage of 14.8V and a full-charge voltage of 16.8V. Use a dedicated 4S lithium-ion charger with the correct charging voltage.
Connection & Battery Pack Integration
The board uses solder-type electrical connections for integration into a compatible battery assembly. Connect the individual cell-group sensing points and main battery connections according to the PCB markings and the correct series-cell sequence.
- Cell Group Connections: Connect the four series cell groups in the correct order.
- Voltage-Sensing Points: Follow the PCB terminal markings and wiring sequence for each cell-group junction.
- Power Connections: Connect the battery and protected output according to the board’s connection layout.
- Soldering: Use suitable soldering tools and ensure secure electrical joints without overheating the PCB.
Applications
This 4S battery protection board is suitable for compatible rechargeable lithium-ion battery assemblies used in portable equipment and custom DC power applications.
- DIY 18650 Battery Packs: Protection and cell balancing for custom four-series battery assemblies.
- Portable Power Equipment: Battery management for compatible rechargeable equipment.
- Solar Lighting Systems: Protection for suitable 4S lithium-ion battery packs used in lighting applications.
- DC Motor Projects: Battery protection for compatible motor-driven equipment within the board’s current limits.
- Robotics Projects: Battery management for suitable mobile robotic platforms.
- Rechargeable LED Lighting: Protection for compatible battery-powered lighting products.
- Embedded Electronics: Battery protection for custom electronic control and monitoring devices.
- Automation Projects: Battery management for suitable portable automation equipment.
- Portable Electronic Devices: Protection for compatible rechargeable electronic assemblies.
- Custom DC Power Systems: Battery protection and balancing for appropriately designed 4S lithium-ion power packs.
Package Contents
- 1 × 4S 14.8V Li-ion Battery Protection Board with Cell Balancing
Product Specifications
| Parameter | Specification |
|---|---|
| Product Type | Lithium-Ion Battery Protection Board (BMS) |
| Supported Battery Type | Lithium-Ion / Lithium-Polymer |
| Series Configuration | 4S (4 series cell groups) |
| Nominal Pack Voltage | 14.8V |
| Full-Charge Pack Voltage | 16.8V |
| Working Current (Natural Cooling) | 10A |
| Working Current (With Additional Heat Sink) | 15A |
| Maximum Instantaneous Current | 30A |
| Overcharge Detection Voltage | 4.25 ± 0.025V per cell |
| Overcharge Release Voltage | 4.15 ± 0.05V per cell |
| Over-Discharge Detection Voltage | 2.50 ± 0.08V per cell |
| Over-Discharge Release Voltage | 3.00 ± 0.1V per cell |
| Overcurrent Protection Threshold | 20–30A |
| Cell Balancing | Supported |
| Protection Functions | Overcharge, over-discharge, overcurrent and short-circuit protection |
| Protection Recovery | Automatic recovery after protection condition clears |
| Connection Type | Solder-type output connections |
| Operating Temperature | -40°C to +85°C |
| Board Length | 50mm |
| Board Width | 22mm |
| Board Height | 3.5mm |
| Product Weight | 4g |
Connection & Operating Recommendations
- Cell Compatibility: Use matched lithium-ion cells with compatible capacity, internal resistance and state of charge.
- Correct Wiring: Follow the PCB terminal markings and connect all four cell groups in the correct series sequence.
- Charger Selection: Use a dedicated 4S lithium-ion CC/CV charger with the correct full-charge voltage.
- Current Management: Select the load according to the cooling arrangement. Do not treat the instantaneous current rating as a continuous operating rating.
- Heat Dissipation: Provide adequate ventilation and additional heat dissipation when operating at the higher working-current rating.
- Cell Balancing: Use compatible cells and allow the balancing function to operate during charging.
- Battery Chemistry: Do not use this board with LiFePO4 or other chemistries unless the board is specifically configured for them.
