JLGW BMS LFP 4S 20A WITH BAL

JLGW BMS LFP 4S 20A Hardware

Product Data Sheet

The BMS LFP 4S 20A WITH BALANCE (JLGW) is a high-capacity, precision-engineered battery protection and management system tailored for 12.8V LiFePO4 battery packs. It’s ideal for applications where moderate-to-high current draw is expected, such as e-mobility, solar storage systems, and industrial power modules.

Technical Specifications

Parameter	Specification
Battery Type	LFP (Lithium Iron Phosphate)
Series Configuration	4S (4 Cells in Series)
Nominal Voltage	12.8V
Charge Cut-off Voltage	14.6V
Continuous Discharge Current	20A
Balance Feature	Yes - Passive Balancing
Balance Activation Voltage	~3.5V per cell
Overcharge Protection	Yes
Over-discharge Protection	Yes
Short Circuit Protection	Yes
Temperature Protection	Yes (Thermistor sensor wire included)
Board Material	High-grade FR4 with aluminum heat sink
PCB Color	Blue/Green Alloy Shield (Based on lot)
Dimensions	Compact with screw mounting slots
Connector Type	JST with integrated harness port

Key Features

• •

  High Current Handling (20A) Supports a stable discharge current of up to 20A, making it suitable for medium-duty applications such as e-bikes and battery packs for tools or inverters.

• •

  Optimized for 4S LFP Systems Designed specifically for 12.8V LiFePO4 packs, ensuring safety and compatibility.

• •

  Smart Passive Balancing Circuitry Maintains cell voltage uniformity, preventing imbalanced cell stress and extending overall battery pack lifespan.

• •

  Plug-and-Play JST Connector Allows quick and secure wiring, ideal for modular battery builds or OEM assembly.

• •

  Thermal and Short Circuit Protection Equipped with built-in thermistor and short protection, ideal for safe installations in enclosed or warm environments.

• •

  Solid Build Quality Constructed with premium components for long-term durability and protection from thermal and voltage irregularities.

Application Areas

• •Solar Panel Storage Banks
• •Electric Bicycles and Scooters
• •Portable Power Tool Packs
• •Outdoor Camping Power Supplies
• •Battery Design and R&D Applications

The PCM LFP 04S 20A (JLGW) is a Battery Protection Circuit Module (PCM) designed for 4 series Lithium Iron Phosphate (LFP) battery packs, supporting a 20A continuous discharge current. This module is ideal for higher-power applications such as energy storage systems, backup power solutions, and electric vehicles. It provides essential protection features, including overcharge, over-discharge, overcurrent, short circuit, and temperature protection, ensuring the safe operation and reliability of the battery. The JLGW designation refers to a specific manufacturer or design. The PCM also helps to maintain cell balance, optimizing the performance and longevity of the battery pack.