PGY091 12V 50A 4S
The PGY-091 is a high-current battery protection board designed for 4-series (4S) LiFePO₄ battery packs. It supports 50 A continuous charge and discharge current and adopts a common port architecture, allowing charging and discharging through the same negative terminal. This product is a hardware-based BMS intended for power and energy storage applications, providing stable high-current capability together with essential protection and passive cell balancing.
Product Detail
Key Features
- Supports 4S LiFePO₄ battery packs
- 50 A continuous charge & discharge current
- Common port design
- Hardware protection functions:
- Overcharge protection
- Over-discharge protection
- Charge over-current protection
- Discharge over-current protection (two-level)
- Short-circuit protection
- Overcharge protection
- Passive cell balancing
- High-current MOSFET configuration (9 charge / 9 discharge)
- Low self-consumption
- Designed for energy storage and power applications
Electrical Specifications
- Battery Chemistry: LiFePO₄
- Number of Cells: 4S
- Nominal Pack Voltage: 12.8 V
- Operating Voltage Range (Pack): 8.8 – 15.0 V
- Max Charge Voltage: 14.6 V (CC–CV)
- Max Continuous Charge Current: 50 A
- Max Continuous Discharge Current: 50 A
Protection Parameters (Typical, 25 °C)
Cell Voltage Protection
- Overcharge Protection (per cell):
3.70 / 3.75 / 3.80 V (Min / Typ / Max) - Overcharge Release Voltage (per cell):
3.50 / 3.55 / 3.60 V (Min / Typ / Max) - Overcharge Protection Delay Time:
500 / 1000 / 1500 ms (Min / Typ / Max) - Over-discharge Protection (per cell):
2.10 / 2.20 / 2.30 V (Min / Typ / Max) - Over-discharge Release Voltage (per cell):
2.60 / 2.70 / 2.80 V (Min / Typ / Max) - Over-discharge Protection Delay Time:
500 / 1000 / 1500 ms (Min / Typ / Max)
Over-Current and Short-Circuit Protection
- Charge Over-Current Protection (Icoc):
80 / 90 / 100 A (Min / Typ / Max) - Charge Over-Current Delay Time:
500 / 1000 / 1500 ms (Min / Typ / Max) - Discharge Over-Current Protection 1 (Idoc1):
130 / 150 / 170 A (Min / Typ / Max) - Discharge Over-Current Protection 1 Delay Time:
500 / 1000 / 1500 ms (Min / Typ / Max) - Discharge Over-Current Protection 2 (Idoc2):
280 / 300 / 320 A (Min / Typ / Max) - Discharge Over-Current Protection 2 Delay Time:
50 / 100 / 150 ms (Min / Typ / Max) - Short-Circuit Protection Delay Time:
200 / 350 / 700 μs (Min / Typ / Max)
Balancing Function
- Balancing Start Voltage:
3.45 / 3.50 / 3.55 V (Min / Typ / Max) - Balancing Current:
25 / 35 / 45 mA (Min / Typ / Max)
Other Electrical Characteristics
- Quiescent Current: 30 / 70 μA (Typ / Max)
- Conduction Resistance (B− to P−): ≤ 35 mΩ
- MOSFET Temperature Rise at Rated Discharge Current: ≤ 65 °C
- Temperature Protection: Not supported
- Low-Power Switch Function: Not supported
Environmental & Mechanical
- Operating Temperature: −20 °C to +65 °C
- Storage Temperature: −40 °C to +90 °C
- Operating Humidity: ≤ 90 % RH (non-condensing)
- Maximum Operating Altitude: 4000 m
- PCB Dimensions: 95 × 50 × 10 mm
Application Scenarios
- LiFePO₄ energy storage battery packs
- Low-voltage power battery systems
- Backup power modules
- High-current 4S LiFePO₄ battery assemblies
Our Advantages
Simple & Reliable
• Stable hardware + proven firmware
• No unnecessary features
Built for Light EVs
• Scooters / E-bikes / Tricycles
• Golf carts / Light electric motorcycles / Drones
Essential Protection
• OV / UV / OC / SC / OTP
• Designed for daily use
Bluetooth Support
• Optional Bluetooth monitoring
• Basic status & diagnostics
Easy Integration
• Clear hardware interface
• Simple configuration
Reasonable Cost
• In-house production
• Competitive pricing for real orders
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Our experts team is ready to help with your specific application needs
Phone: +86-13620907687
Email : business@pgybms.com
Launch Tech Industrial Park, No. 4012 Wuhe Avenue, Bantian Street, Longgang District,Shenzhen