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- Battery Li-ion Battery BMS Protection Board 3S 10/20A 11.1V/12.6V HX-3S-D01 for 18650
- Battery Accessories
Features:
- Designed for 3S (11.1V / 12.6V) lithium-ion battery packs
- Compatible with 18650 Li-ion cells
- Provides overcharge, over-discharge, overcurrent, and short circuit protection
- Supports 10A continuous current with 15–20A peak current capability
- Low standby current (<50µA) for improved energy efficiency
- Wide operating temperature range
- Compact and lightweight design for easy integration
- Stable and reliable performance for long-term usage
Principle of Work:
The module monitors the voltage of each individual cell in the battery pack. If any cell exceeds the safe charging voltage limit, the charging circuit is disconnected. Similarly, if a cell’s voltage drops below the safe discharge threshold, the load is disconnected to prevent battery damage. In addition, the BMS detects overcurrent and short circuit conditions. When such events occur, it immediately cuts off the output to protect both the battery and connected devices. Once conditions return to normal, the system can resume operation automatically.
Pinout:

- B+: Battery positive terminal
- B-: Battery negative terminal
- B1: Connection between cell 1 and cell 2
- B2: Connection between cell 2 and cell 3
- P+: Output/charging positive terminal
- P-: Output/charging negative terminal
Applications:
- 3S 18650 lithium battery packs
- Power banks and portable battery systems
- Electric tools and DIY battery projects
- LED lighting systems
- Robotics and embedded electronics
- Solar energy storage solutions
Circuit:

- Connect B+ and B- to the battery pack terminals
- Connect B1 and B2 to the intermediate battery cells
- Use P+ and P- for load and charger connections
- Ensure correct wiring order to avoid damage
Technical Details:
- Model: HX-3S-D01
- Battery Type: 3S Li-ion (18650)
- Nominal Voltage: 11.1V
- Full Charge Voltage: 12.6V
- Continuous Working Current: 10A
- Peak Current: 15–20A
- Over-discharge Voltage: 2.3 – 3.0V ±0.05V
- Operating Temperature: -40°C to +50°C
- Storage Temperature: -40°C to +80°C
- Quiescent Current: <50µA
- Dimensions: 51 × 23 × 4.0 mm
Features:
- Designed for 3S (11.1V / 12.6V) lithium-ion battery packs
- Compatible with 18650 Li-ion cells
- Provides overcharge, over-discharge, overcurrent, and short circuit protection
- Supports 10A continuous current with 15–20A peak current capability
- Low standby current (<50µA) for improved energy efficiency
- Wide operating temperature range
- Compact and lightweight design for easy integration
- Stable and reliable performance for long-term usage
Principle of Work:
The module monitors the voltage of each individual cell in the battery pack. If any cell exceeds the safe charging voltage limit, the charging circuit is disconnected. Similarly, if a cell’s voltage drops below the safe discharge threshold, the load is disconnected to prevent battery damage. In addition, the BMS detects overcurrent and short circuit conditions. When such events occur, it immediately cuts off the output to protect both the battery and connected devices. Once conditions return to normal, the system can resume operation automatically.
Pinout:

- B+: Battery positive terminal
- B-: Battery negative terminal
- B1: Connection between cell 1 and cell 2
- B2: Connection between cell 2 and cell 3
- P+: Output/charging positive terminal
- P-: Output/charging negative terminal
Applications:
- 3S 18650 lithium battery packs
- Power banks and portable battery systems
- Electric tools and DIY battery projects
- LED lighting systems
- Robotics and embedded electronics
- Solar energy storage solutions
Circuit:

- Connect B+ and B- to the battery pack terminals
- Connect B1 and B2 to the intermediate battery cells
- Use P+ and P- for load and charger connections
- Ensure correct wiring order to avoid damage
Technical Details:
- Model: HX-3S-D01
- Battery Type: 3S Li-ion (18650)
- Nominal Voltage: 11.1V
- Full Charge Voltage: 12.6V
- Continuous Working Current: 10A
- Peak Current: 15–20A
- Over-discharge Voltage: 2.3 – 3.0V ±0.05V
- Operating Temperature: -40°C to +50°C
- Storage Temperature: -40°C to +80°C
- Quiescent Current: <50µA
- Dimensions: 51 × 23 × 4.0 mm