High-performance precision resistor for electric vehicles

Posted By : Alex Lynn
High-performance precision resistor for electric vehicles

Electromobility is steadily gaining ground in the automotive industry, and its relevance is increasing accordingly. With the presentation of its new BAX shunt, Isabellenhütte is now taking due account of the requirements that this trend is imposing on components for high-power battery management systems.

In the last year, demand for high-performance shunts for use in electric vehicles has skyrocketed. This is down to the pace of development in the electromobility sector. Currents of up to 1,000A flow through high-voltage batteries with voltages of up to 800V, such as those installed in electric vehicles. 

Such extremely high power loads require resistors with a larger construction and lower resistance values to keep power losses to an absolute minimum. Which is why the Isabellenhütte has developed the BAX specially for the automotive industry. Alongside the BAS, the BAX shunt is the largest low-ohmic shunt in the company’s product portfolio and thus also the most powerful.

In other applications, such as solar inverters with even higher currents, larger components are by no means a rarity, unlike in the auto industry, where components generally need to be particularly small and intricate, and, at the same time, as lightweight as possible.

It is here that the BAX as a battery management shunt is a powerful solution that, with its long-term stability, permanent power output of up to 50 watts, and permanent currents of up to 1,000A, was specially developed for use in electric vehicles.

Customer-specific adaptations of the resistance values of the standard component are possible. The shunt is also available in a nickel-plated version.


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