PROTECTION CONCEPT WITH HVB10

The innovative HVB10 protection concept is based on the combination of switching and protecting functions in a single device. This helps prevent coordination problems between these functions and saves connecting elements. The double pole design switches plus and minus pole of the battery pack simultaneously, further reducing the number of components and saving valuable installation space. The fully bidirectional design enables optimal performance in driving and charging mode.

When a defined current level is exceeded, the device automatically switches off completely. With this and the purely electromechanical design, the functional safety requirements are reduced to a minimum.

Another advantage of the electromechanical component is its resettability. The device can be reset after minor overcurrent situations, which prevents costly vehicle downtimes.

INNOVATIVE SWITCHING PRINCIPLE FOR EXTREMELY FAST TRIPPING AND OPTIMIZED HEAT DISSIPATION

While levitation effects caused by high currents can lead to dangerous contact sticking in high voltage contactors, the HVB10 utilizes these effects to its advantage. The higher the short circuit, the faster the contact opens, i.e. extremely fast trip times of only a few milliseconds.

The HVB10 provides 340 A continuous current, temporary charging peaks of more than 600 A and a tripping performance of far more than 17 kA at 850 V operating voltage.

The main focus in developing the HVB10 for series production is optimizing the device for very high charging currents and reducing charging times. E-T-A’s 75 years of experience in the area of overcurrent protection is the perfect basis.

A-samples are available. E-T-A is currently examining further developments for even higher voltages and currents, for example in relation to the Megawatt Charging System.