Factory Direct Provide 3s/4s Li-ion 18650 PCB Board 4A 11.1V /14.8V Battery Management System BMS

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Product Description

Basic Specifications

Model NO.:LWS-4S4A-049(4S)
Charging Current:4A
Discharging Current:4A
Type Voltage:11.1V/ 14.8V
PCM Size:L48*W16*T4mm
Short Circuit Protection:Cut Load
Over Current Protection:15A +-2A
Type:Flexible Circuit Board
Material:Fiberglass Epoxy Resin + Polyimide Resin
Application:Medical Instruments
Flame Retardant:V0
Production Capacity:50000 Pieces /Months

Product Features & Advantages

Tell us your relative voltage, cells, current requirements, or equipment type, and we will recommend the most suitable battery management solutions for your needs.

  • Supply OEM/ODM and custom service
  • High quality with smart balance function
  • ISO9001/ISO14001/CE/ROHS certificates
  • Excellent safety performance
  • Short circuit testing passed
  • Overcharge & Over discharge testing passed
  • Original imported components (Japan IC, USA MOS)
  • 1.2m drop testing passed
  • One year warranty

BMS/PCB/PCM Functions

Main Functions: Detect and protect the battery from over-charge, over-discharge, over-current, and short-circuits. Includes temperature detection and automatic voltage balancing.

Built with high-end electronic components (High End IC and MOSFET), the simple structure design ensures stable performance and flexible application for various battery series.

PCM Specifications For 11.1V (3S) Li-ion Battery Packs
Voltage Charging voltage DC: 12.6V CC/CV
Current Max continuous charging/discharging 4A
Peak current (2-3 seconds) 10A
Over Charge Protection Detection voltage (single cell) 4.350±0.025 V
Release voltage (single cell) 4.150±0.050 V
Over Discharge Protection Detection voltage (single cell) 2.40V±0.08V
Release voltage (single cell) 3.00±0.100 V
Over Current Protection Detection current 25±5A
Short Protection Release condition Cut load
Temperature Operating Range -40 ~ +85ºC
Components Protection IC model S8254AAJ (Seiko)

Factory & Production Display

Packaging & Logistics

Payment Terms: PayPal, T/T, L/C.

Frequently Asked Questions

Q: How do I choose the correct Ampere for the protection circuit board? A: It depends on your load power, such as electric motor power. Please consult technical support with your equipment specs before purchasing.
Q: What is the difference between same port and different port wiring? A: In different port wiring, the cathodes of the charger and load are separate. In same port wiring, they are the same, meaning charging and discharging currents are equal.
Q: What is the benefit of the balance function? A: The equilibrium function discharges high-voltage cells via a resistor while waiting for low-voltage cells to catch up, ensuring consistent voltage across the entire battery group.
Q: Is there a Minimum Order Quantity (MOQ)? A: No, we do not have a strict MOQ requirement. We support various capacities and sizes based on individual customer needs, including ODM and OEM projects.
Q: What safety tests have these PCM boards passed? A: Our products undergo rigorous testing, including short circuit, overcharge, over-discharge, and 1.2m drop tests to ensure maximum safety.
Q: What is the typical lead time for production? A: With a production capacity of 50,000 pieces per month, we offer fast delivery. Specific timelines depend on the order volume and customization requirements.

Inquiry & Support

Any further questions, welcome to contact our sales team by sending an inquiry. Your satisfaction is our priority. Let's work together for mutual benefits!

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