Electric vehicles (EVs) need fast, reliable protection for their high-voltage batteries. Our new modular solid-state disconnector (SSD), featured in the IEEE Journal of Emerging and Selected Topics in Power Electronics, delivers just that.
800V and 70A Continuous Rating
Designed for 800V and 70A, our SSD handles modern EV demands. Tested at 400V with 25A nominal and 99A peak per module, it's built to protect against short-circuit currents—tripping in under 1.3$\mu$s, far faster than traditional fuses.
Figure 1: SSD Prototype
I²t Algorithm for Overcurrent
The I²t algorithm smartly handles overcurrent by calculating thermal energy (current squared × time). It trips faster for big faults (e.g., 42ms at 40A) but ignores brief spikes, keeping the system running smoothly.
Modular Design with Equal Current Sharing
Our SSD scales via parallel modules, each sharing current during steady-state and during faults. This boosts capacity, adds redundancy, and uses cost-effective components.
Figure 2: Modular SSD
A fast, scalable solution for EV battery safety—watch this space!