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Battery Double Side Flexible Printed Circuit Board

Layers 2
Board Thickness 0.2MM
Material No glue calender
Copper Thickness 1 OZ
Surface Treatment Immersion nickel gold
Minimum Line Width/Line Spacing 0.2/0.2MM
PI Reinforcement Thickness 0.2MM nickel sheet
Impedance /

 

Battery Double-Side Flexible Printed Circuit Board (FPCB) refers to a high-density, ultra-thin, and flexible circuit board designed for ​battery management systems (BMS), energy storage monitoring, and thermal regulation in electric vehicles (EVs), consumer electronics, and industrial power applications. Built on a ​0.1–0.3mm thick polyimide (PI) substrate with dual copper layers and metalized vias, this FPCB enables precise signal routing, mechanical flexibility, and durability for applications requiring compact designs, dynamic bending, and high-reliability performance

Key Features & Technical Specifications

  • Ultra-Thin & Flexible Design:
    • 0.1mm thickness reduces battery module bulk by up to ​30% compared to rigid PCBs or traditional wire harnesses, ideal for space-constrained EV battery packs
    • Supports ​90°–180° bending with a minimum bend radius of ​0.5mm, enabling integration into curved battery casings or modular designs
  • High-Density Interconnects:
    • Dual-layer/multi-layer routing with ​0.03mm/1mil trace width allows simultaneous monitoring of multiple battery cells (e.g., voltage, temperature, and state-of-charge) in high-density EV batteries
    • Microvias (0.05mm/2mil) andblind/buried vias enable compact layouts for integrated components like embedded fuses and connectors
  • Signal Integrity & Performance:
    • Controlled impedance (100Ω–1GHz) ensures stable transmission of critical battery data (e.g., CAN bus communication, fast-charging protocols)
    • EMI shielding and ​low crosstalk design minimize interference in high-noise EV environments
  • Thermal Management & Safety:
    • Integrated thermal sensors (NTC/PTC) and ​phase change materials (PCMs) enable real-time temperature monitoring and active cooling for battery thermal stability
    • IP67/IP68 certification and ​conformal coating protect against moisture, dust, and extreme temperatures (-40°C to 125°C)
  • Manufacturing & Cost Efficiency:
    • Automated optical inspection (AOI) and ​laser drilling ensure precision in via alignment and defect-free production
    • RoHS/REACH compliance and ​halogen-free materials meet global sustainability standards while reducing assembly costs by ​40% vs. traditional wire harnesses

Applications

  1. Electric Vehicles (EVs):
    • Battery Management System (BMS) for monitoring and balancing cell voltages and temperatures
    • High-voltage battery pack interconnects for EVs (e.g., Tesla,比亚迪,宁德时代)
  2. Consumer Electronics:
    • Power banks, portable batteries, and wearable devices with compact, flexible charging solutions
  3. Industrial & Energy Storage:
    • Large-scale energy storage systems (ESS) for solar/wind power installations
    • Backup power solutions for industrial machinery with high-reliability requirements

Advantages Over Rigid PCBs & Wire Harnesses

  • Space Optimization:
    • Replaces bulky wire harnesses, saving ​30–50% in battery module volume and weight
    • Enables ​3D conformal packaging for curved or uneven battery casings
  • Cost Efficiency:
    • Simplifies assembly with ​surface-mount technology (SMT) and reduces material waste by ​40%
    • Lowers labor costs through automated welding and placement
  • Design Flexibility:
    • Supports dynamic interfaces for expandable battery systems or modular upgrades
    • Integrates multiple functions (sensing, communication, power distribution) into a single component
  • Long-Term Reliability:
    • Tested for ​10+ years under ​AEC-Q101 automotive-grade standards and ​IPC-6012 Class 3 durability

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