Battery Management System (BMS)

• Cell Configuration: 13S (13 cells in series)

• Nominal Voltage: 48 V

• Continuous Discharge: 60 A

• Protection Types: Overcharge, Over-discharge, Overcurrent, Short circuit

• Balance Feature: Equalizer board keeps cells in sync

• Waterproof & Durable: Dust/shock resistant

• Size & Weight: ~70 × 56 × 9 mm, ~60 g

• Charging voltage: 12.6 V-13 V
• Overvoltage range: 4.25-4.35 V ± 0.05 V
• Overvoltage range: 2.3-3.0 V ± 0.05 V
• Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use)
• Continuous charge current (upper limit): 30A
• Current: less than 30uA
• Internal resistance: less than 45 MΩ
• Service life: more than 50000 hours
• Operating temperature: -40 to + 50 degrees
• Storage conditions: -40 to + 80 degrees
• Size: 41 * 55 * 3.4mm
• Protection against short circuits: protection, self-healing delay

BMS 4S 20A Protection Board 18650 Li-ion Lithium Battery is an electronic regulator that monitors and controls the charging and discharging of rechargeable batteries. Battery BMS protection boards are the brains behind battery packs. BMS 4S 20A Protection Board 18650 Li-ion Lithium Battery manages the output, charging, and discharging and also provides critical safeguards to protect the batteries from damage. 18650 protection circuit Board is a high-accuracy voltage detection circuit. The 20A protection board can be used for lithium-ion Phosphate batteries, Low power inverters, massager battery packs, electronics, LED light backup power supplies, solar street lights battery packs, and many other products

•  Model Number: DL4S
• For LiFePO4 Battery Pack
• Battery series: 4S
• Temperature Sensor: Yes
• Overcharge protection: Yes
• Over-discharge voltage: Yes
• Short circuit protection: Yes
• Balance function: Yes
• Accessory: Free cable
• Water proof: Yes

• Supports 7-cell (7S) Li-Ion battery packs – ideal for 24V systems

• 100A continuous current rating, with surge support up to 150–300A

• Advanced thermal management with heat sinks and fan-ready design

• Automatic cell balancing (100mA passive balancing) ensures voltage uniformity

• Overcharge, over-discharge, overcurrent, short-circuit, and temperature protection

• Optional Bluetooth, CAN, UART, or WiFi modules for real-time monitoring

• Waterproof, dustproof, and vibration-resistant casing

• Low standby current for improved energy efficiency

• Certified for safety and durability (ISO, FCC, CE, RoHS, etc.)