16S 57.6V 59.2V Li-ion LiPo Battery PCM BMS Balance Protect Circuit Board Module

16S 57.6V/59.2V Li-ion/LiPo Battery Protection Board (BMS/PCM) - High Voltage Protection

Professional Battery Management System (BMS) / Protection Circuit Module (PCM) specifically designed for high-voltage 16S (57.6V/59.2V) lithium-ion and lithium-polymer battery packs. Available in 4 models with current ratings from 5A to 80A. Features comprehensive protection including overcharge, over-discharge, overcurrent, short circuit, and temperature protection, plus built-in 16-cell balancing function. Perfect for high-voltage DIY battery packs, electric vehicles, e-bikes, solar energy storage, and high-power applications.

Key Features

• High Voltage Support: 16S configuration (57.6V nominal, 59.2V max)
• 4 Models Available: 5A, 35A, 60A, 80A current ratings
• Li-ion/LiPo Compatible: Works with both lithium-ion and lithium-polymer batteries
• Comprehensive Protection: Overcharge, over-discharge, overcurrent, short circuit, temperature
• 16-Cell Balancing: Built-in balancing for all 16 cells
• Quality Components: High-quality MOSFETs and protection ICs
• Various Sizes: Different form factors for different applications
• Low Self-Consumption: Minimal power drain

Package Contents

• 1× 16S Li-ion/LiPo Protection Board (BMS/PCM) - model as selected

Available Models

Technical Specifications

Protection Features

Step-by-Step Installation Instructions

⚠️ WARNING: 16S = 67.2V Maximum - High Voltage! Take Extra Precautions

Step 1: Preparation & Safety

• CRITICAL: Disconnect all power sources before starting
• HIGH VOLTAGE WARNING: 16S battery can reach 67.2V - potentially lethal
• Verify you have exactly 16 Li-ion or LiPo cells in series
• Select correct BMS model based on maximum current draw
• Prepare tools: soldering iron, solder, wire cutters, multimeter, heat shrink tubing
• Wire gauge recommendations:
• 5A: 16-18 AWG
• 35A: 10-12 AWG
• 60A: 8-10 AWG
• 80A: 6-8 AWG
• Wear insulated gloves when working with high voltage
• Work on insulated surface
• Have fire extinguisher nearby

Step 2: Identify Connection Points

• Locate connection points on BMS:
• B- (Battery Negative): Connect to negative terminal of battery pack
• B+ (Battery Positive): Connect to positive terminal of battery pack
• P- (Load/Charger Negative): Output negative terminal
• P+ (Load/Charger Positive): Output positive terminal
• Balance Wires (16S): B-, B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, B+
• Study wiring diagram carefully before proceeding
• Take photos for reference

Step 3: Connect Balance Wires (Most Critical Step)

• For 16S Configuration - 17 balance wire connections:
• B- → Negative terminal of Cell 1
• B1 → Connection between Cell 1 and Cell 2
• B2 → Connection between Cell 2 and Cell 3
• B3 → Connection between Cell 3 and Cell 4
• B4 → Connection between Cell 4 and Cell 5
• B5 → Connection between Cell 5 and Cell 6
• B6 → Connection between Cell 6 and Cell 7
• B7 → Connection between Cell 7 and Cell 8
• B8 → Connection between Cell 8 and Cell 9
• B9 → Connection between Cell 9 and Cell 10
• B10 → Connection between Cell 10 and Cell 11
• B11 → Connection between Cell 11 and Cell 12
• B12 → Connection between Cell 12 and Cell 13
• B13 → Connection between Cell 13 and Cell 14
• B14 → Connection between Cell 14 and Cell 15
• B15 → Connection between Cell 15 and Cell 16
• B+ → Positive terminal of Cell 16
• Use 22-24 AWG wire for balance connections
• Label EVERY wire before connecting (critical with 17 wires!)
• Use numbered labels or color coding
• Connect in sequence from B- to B+
• Verify each connection with multimeter (~3.6-4.2V between adjacent points)

Step 4: Connect Main Power Wires

• Battery Side:
• Connect B- to battery pack negative using appropriate gauge wire
• Connect B+ to battery pack positive using appropriate gauge wire
• Load/Charger Side:
• Connect P- to load/charger negative
• Connect P+ to load/charger positive
• Use heavy gauge wire for high current models
• Ensure all connections are solid and well-insulated
• Consider using ring terminals for secure connections

Step 5: Verify All Connections

• CRITICAL - Check before power-on:
• ✅ All 17 balance wires connected in correct sequence
• ✅ No reversed polarity on any connection
• ✅ All solder joints solid and insulated
• ✅ No short circuits between wires
• ✅ Verify voltage at each balance point with multimeter
• ✅ Total pack voltage should be 57.6V-67.2V
• ✅ Each cell voltage should be 3.6V-4.2V

Step 6: Initial Testing

• Connect battery pack to BMS
• Measure voltage at P+ and P- (should read full pack voltage)
• If no output: BMS in protection mode, connect charger briefly to wake
• Test with low current load first (1-2A)
• Monitor BMS temperature for first 30 minutes
• Verify protection functions work
• Check cell balancing is functioning

Step 7: Final Assembly

• Apply heat shrink to all connections
• Secure BMS in enclosure with foam padding
• Ensure excellent ventilation (high current = heat)
• Route balance wires neatly, avoid sharp bends
• Keep balance wires away from high-current wires
• Label output terminals clearly with voltage warning
• Add warning label: "HIGH VOLTAGE - 67.2V MAX"

Important Safety Precautions

⚠️ CRITICAL HIGH VOLTAGE WARNINGS

Before Installation:

• ❌ NEVER use on wrong cell count - 16S ONLY
• ❌ Do NOT exceed rated current
• ❌ Do NOT reverse polarity - instant destruction
• ❌ Do NOT skip balance wires - will not protect properly
• ❌ Do NOT use with LiFePO4 batteries - Li-ion/LiPo ONLY
• ✅ Verify exactly 16 cells in series
• ✅ Ensure all cells balanced (within 0.05V)
• ✅ Use proper wire gauge for current rating

High Voltage Safety:

• 67.2V can cause serious injury or death
• Always disconnect power before working on pack
• Use insulated tools
• Wear insulated gloves
• Work on insulated surface
• Never work alone on high voltage packs
• Keep one hand in pocket when testing (prevents current through heart)

Balance Wire Connection Tips:

• With 17 balance wires, organization is critical
• Create a numbered diagram before starting
• Label each wire with permanent marker or tape
• Use different colored wires if possible
• Work methodically from B- to B+
• Test each connection before moving to next
• One mistake can destroy the BMS

Common Mistakes:

• ❌ Balance wires in wrong order (most common with 16S)
• ❌ Skipping balance wire connections
• ❌ Using wire too thin for current
• ❌ Not insulating high voltage connections properly
• ❌ Exceeding current rating

Troubleshooting:

• No output voltage: BMS in protection, connect charger to reset
• BMS shuts off: Current exceeds rating or balance wire issue
• Won't charge: Check balance wires, verify charger voltage (67.2V)
• Overheating: Current too high or poor ventilation
• Cells not balancing: Verify all 17 balance connections

Common Applications

• Electric Vehicles: E-bikes, electric scooters, electric motorcycles
• Solar Energy Storage: 48V solar battery banks (16S = 57.6V nominal)
• High Power Tools: Professional cordless tools
• Electric Skateboards: High performance boards
• DIY Projects: Custom high-voltage battery packs
• Backup Power: High voltage UPS systems

Why Use BMS for High Voltage Packs?

• Essential for safety with 67.2V maximum voltage
• Prevents overcharging - extends battery life
• Balances 16 cells - ensures even aging
• Protects against dangerous failures
• Required for safe high-voltage operation
• Protects expensive battery investment

Warranty & Support

We stand behind our BMS boards. If you experience issues, contact us for support. Always follow installation instructions carefully. Improper installation of high-voltage systems can be dangerous. If unsure, consult a professional.