IN Brief:
- Cyntec is showcasing automotive-grade BJB components at The Battery Show Europe.
- The portfolio covers shunts, Hall-effect current sensing, eFuse modules, base plates, and 48V DC-DC modules.
- 400V and 800V battery systems are increasing demand for compact sensing, protection, and integration.
Cyntec is showcasing an automotive-grade component portfolio for battery junction box applications at The Battery Show Europe 2026 in Stuttgart.
The portfolio addresses 400V and 800V battery systems, covering current sensing, functional safety, protection, and mechanical integration within high-voltage battery junction boxes. Products include calibration-free TCR shunts, aluminium terminal shunts, ASIL-C/D shunt modules, dual-technology current sensors, precision welding shunts, 48V DC-DC modules, base-plate assemblies, and 800VDC eFuse modules.
The calibration-free TCR shunt is designed to improve state-of-charge estimation while reducing calibration and system complexity. Aluminium terminal shunts combine busbar and sensing elements to reduce weight and cost, while ASIL-C/D shunt modules address ISO 26262 safety requirements with high measurement accuracy.
For redundant current measurement, Cyntec’s dual-technology sensor combines shunt and Hall-effect sensing in a low-profile package. The four-terminal precision welding shunt provides high power handling in a compact footprint, with a low temperature coefficient of resistance for precision current measurement in electrically and thermally demanding environments.
The wider battery junction box has become a more active part of EV system design. It now has to support protection, current measurement, switching, diagnostics, thermal control, and reliable high-volume assembly rather than simply housing pack-level connections. With 800V platforms, design work around creepage, clearance, isolation, switching transients, and safe serviceability becomes more critical.
Battery intelligence depends heavily on measurement quality. Hardware developments such as commercial battery monitoring deployments place more emphasis on the accuracy and reliability of the underlying electrical data. State-of-charge, state-of-health, fault detection, and protection decisions all depend on current sensing that remains stable across temperature, ageing, and operating load.
Protection is also moving closer to the pack. Cyntec’s 800VDC eFuse module is designed for battery backup units and automotive applications, using PWM-based current sharing and re-rush current control. As battery packs become larger and more expensive, rapid and controlled fault isolation can reduce damage, warranty exposure, and safety risk.
The inclusion of 48V DC-DC modules points to another architectural shift. Vehicle electrical systems are moving toward zonal and higher-voltage auxiliary distribution as electrical loads increase. Local conversion can reduce bulky wiring and improve distribution efficiency, but it also adds pressure on compact module design, thermal handling, and electromagnetic compatibility.
Cyntec’s BJB portfolio brings current sensing, power conversion, protection, and mechanical integration into a single application set. That mirrors the way EV battery systems are now engineered: the value lies not in any one component, but in how accurately, safely, and repeatably the pack can be monitored and protected.
