PC CCS Flexible Circuit Board for EV Power Battery Module – Automotive PACK Connection Harness & Cell Contact System Signal Acquisition

What Is FPC CCS in New Energy Vehicle Battery Systems?

In the rapidly evolving landscape of new energy vehicles (NEVs) , the demand for lightweight, high-reliability, and space-efficient battery interconnection solutions has never been greater. At the heart of this innovation lies the FPC flexible printed circuit – a technology that is fundamentally transforming how automotive power battery modules communicate with the Battery Management System (BMS).

CCS (Cells Contact System), also known as integrated busbar or wiring harness board assembly, is a critical component in EV battery packs that connects individual battery cells to the BMS. A typical CCS assembly consists of signal acquisition components (FPC, PCB, or FFC), plastic structural parts, and copper-aluminum busbars, integrated through thermal lamination or riveting processes. The FPC flexible circuit board serves as the "neural network" of the battery module – collecting voltage and temperature data from each cell and transmitting it reliably to the BMS for real-time monitoring and control.

Why FPC Is Replacing Traditional Wiring Harnesses in EV Battery PACKs

Traditional copper wire harnesses have long been the standard for battery signal collection. However, as automotive battery PACK designs evolve toward higher integration and larger module sizes, the limitations of conventional wiring have become increasingly apparent.

FPC flexible printed circuits offer several game-changing advantages:

1. Ultra-Thin and Lightweight – With thicknesses below 0.2mm, FPCs dramatically reduce the weight and volume of the battery connection system, directly contributing to vehicle lightweighting and extended driving range.

2. Superior Flexibility and Reliability – Unlike rigid PCBs, FPCs are manufactured on polyimide or polyester film substrates, allowing them to flex and accommodate cell swelling during charge-discharge cycles. This flexibility ensures consistent electrical connections throughout the battery's service life.

3. High-Density Integration – FPCs integrate temperature sensors, nickel tabs, and multiple signal traces into a single compact circuit, enabling high-density signal acquisition that would be impossible with discrete wires.

4. Automated Assembly Compatibility – The thin, flexible nature of FPCs allows for robotic pick-and-place assembly directly onto battery modules, significantly improving production efficiency and consistency.

5. Space Optimization – FPCs can be routed through tight spaces and complex battery layouts, maximizing the utilization of every cubic millimeter within the battery PACK enclosure.

How FPC CCS Works in Automotive Power Battery Modules

In a typical new energy vehicle power battery module, each module is equipped with one CCS assembly, which generally configures 1-2 FPCs. The flexible circuit board is etched with precise circuit patterns on flexible copper foil laminated onto polyimide film.

The FPC CCS performs two critical functions:

· Voltage Sensing – The FPC connects to each cell's terminals through busbars, continuously monitoring individual cell voltages and reporting anomalies to the BMS.
· Temperature Monitoring – NTC thermistors mounted on the FPC detect temperature variations across the battery module, preventing thermal runaway and ensuring safe operation.

This real-time data flow enables the BMS to balance cell charges, manage thermal conditions, and protect the battery from over-discharge or over-charge conditions.

The Growing Market for FPC CCS in Electric Vehicles

The adoption of FPC technology in automotive battery systems has accelerated dramatically since around 2017, when new energy battery FPCs began to be widely adopted in the smart EV sector. Today, FPC CCS has become the most widely used cell contact system solution, with mature technology and proven reliability.

Industry data shows that each battery module requires one CCS, and each CCS typically integrates 1-2 FPCs. As battery PACKs grow larger and more modular, the value contribution of CCS components continues to rise, making FPC CCS a high-growth opportunity for manufacturers.

Leading automotive connector manufacturers and FPC suppliers are now expanding their CCS product lines, leveraging advanced flexible printed circuit manufacturing capabilities to enhance technical advantages and cost competitiveness for CCS customers worldwide.

Key Considerations for Sourcing FPC CCS Solutions

When selecting an FPC flexible circuit board supplier for automotive power battery CCS applications, consider the following:

· Material Selection – Polyimide (PI) substrates offer superior thermal stability and chemical resistance for demanding automotive environments.
· Precision Manufacturing – Look for suppliers with advanced etching and lamination capabilities to ensure consistent impedance and signal integrity.
· Reliability Testing – Automotive-grade FPCs must pass rigorous thermal cycling, vibration, and humidity tests to meet AEC-Q standards.
· Customization Capabilities – Every battery PACK design is unique; your FPC CCS partner should offer flexible customization for different cell formats and module layouts.

Conclusion

The shift from traditional wiring harnesses to FPC-based CCS solutions represents a fundamental advancement in new energy vehicle battery technology. As the automotive industry continues its relentless pursuit of higher energy density, improved safety, and lower manufacturing costs, flexible printed circuit boards will play an increasingly central role in power battery module interconnection.

Whether you are an automotive OEM, a battery PACK manufacturer, or a tier-1 supplier, investing in high-quality FPC CCS technology is no longer optional – it is essential for staying competitive in the rapidly evolving EV market.

For more information on custom FPC flexible circuit solutions for automotive battery CCS applications, contact our engineering team today.

Source manufacturer, safety and quality let you rest assured

Focusing on FPC for more than ten years, Androw Technology looks forward to cooperating with you. Work together to create high-quality,high-end products