Cyntec to Unveil New Battery Junction Box Portfolio in Stuttgart

STUTTGART, GERMANY — Power magnetics and current sensing developer Cyntec has announced it will showcase its next-generation portfolio of automotive-grade modular components for Battery Junction Box (BJB) applications at the upcoming The Battery Show Europe 2026. The exhibition is scheduled to take place in Stuttgart from June 9th to 11th.

The new product architecture directly targets high-voltage (400V/800V) BJB design constraints, specifically focusing on functional safety compliance, slow system protection response times, and complex component integration. Cyntec’s technical approach relies on a hardware mix of advanced shunt sensors, electronic fuses (eFuse), and pre-integrated base plate systems.

Addressing Weight, Space, and Functional Safety

Cyntec’s modular strategy aims to simplify the increasingly crowded high-voltage packaging environment inside modern electric vehicles. In addition to core traction battery components, the company is introducing an automotive-grade 48V DC-DC module engineered to interface with modern Zone Control Unit (ZCU) architectures. By stepping up from traditional 12V topologies to 48V, the company aims to reduce heavy wiring harnesses, supporting compact vehicle designs while improving overall safety margins.

Key Component Innovations Slated for Exhibition

The product rollout spans multiple specific current sensing and power distribution innovations, categorized by engineering objective:

• High-Precision Shunt Technologies: The portfolio introduces a Calibration-Free TCR Shunt aimed at sharpening State of Charge (SOC) estimation precision without adding system overhead. For raw weight and cost mitigation, the Aluminum Terminal Shunt integrates aluminum busbars directly into the core sensing elements.
• Safety-Critical Modules: For vehicles requiring strict compliance with ISO 26262 functional safety mandates, Cyntec will exhibit an ASIL-C/D Level Shunt Module delivering ±0.1% tracking accuracy. A low-profile Dual-Technology Current Sensor combines a standard shunt and a Hall Effect system into a singular ASIL D compliant housing optimized for tight spaces.
• Density & Power Management: For tight spaces, a 4-Terminal precision welding shunt yields a 10W power handling capability within a 0.12 x 0.16″ footprint (TCR < 20ppm). On the distribution side, the All-in-One BJB Base Plate replaces a traditional array of over 100 individual components to reduce assembly labor and cost.
• Solid-State Protection: A new 800VDC eFuse Module built for both automotive drivetrains and Battery Backup Unit (BBU) applications uses a PWM-based design to deliver stable current sharing and in-rush current control in high-voltage DC networks, including AI server systems.

Cyntec will present these technical solutions live at Hall 5, Booth E-20 during the three-day trade event.