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Explosions that save lives

  • Bosch microchips control small explosive charges attached to electric vehicles’ batteries and isolate the power supply in the event of a collision.
  • More safety for vehicle occupants, rescue crews, and first responders.
  • Bosch semiconductor chips reliably deploy airbags as well.
Tim Wieland

Tim Wieland

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Reutlingen, Germany. With more and more electric cars on the road, many drivers are increasingly uncertain what they should do or not do in the event of a collision. Electric motors also present rescue crews with new challenges. In fact, like any other vehicle, electric vehicles are equipped with safety features for such events. For example, Bosch semiconductors help prevent the risk of electric shock after an accident. Specially designed microchips deactivate the vehicle’s power circuits in a fraction of a second. This enables rescue crews to set to work immediately and ensures that first responders and the vehicle’s occupants remain safe. “Our semiconductor technology plays a vital role in the safety of hybrid and electric vehicles,” says Jens Fabrowsky, member of the executive management of Bosch’s Automotive Electronics division. Bosch supplies vehicle manufacturers with semiconductor chips for incorporation in special systems that safely disconnect the battery in the event of a collision. “Faced with the growing number of electric vehicles that could potentially be involved in collisions, such systems are absolutely essential if we are to fulfill our mission of helping and rescuing victims of road accidents as rapidly and safely as possible,” adds Karl-Heinz Knorr, vice-president of the German firefighters association (DFV).

Controlled explosions isolate cables

For a lot of people, damaged cables as the result of an accident are a cause for concern: the current from the battery could leak into the metal bodywork of a hybrid or all-electric car. After all, these batteries are designed to deliver a voltage of 400 to 800 volts. But they can rest assured: Bosch semiconductor chips ensure that the high-voltage battery is automatically disconnected, so that no more than ten by ten millimeters and weighing just a few grams – trigger the pyrofuse. This sets off little explosions that drive a wedge into the high-voltage cable between the battery unit and the power electronics, disconnecting the two. By cutting off the flow of current this way, the risk of electric shock or fire is eliminated.


Complex circuits on a few square millimeters of silicon

The CG912 integrated airbag system IC used in the pyrofuse system is an application-specific integrated circuit or ASIC. The specific application in this case is automotive safety. “Our ASICs, which are no bigger than a fingernail and yet populated with millions of transistors, are custom-designed to activate safety functions reliably within a fraction of a second,” Fabrowsky says. Originally developed by Bosch to trigger the release of airbags, the CG912 has performed reliably millions of times in this application. Modern vehicles contain dozens of ICs to control not only safety features such as airbags and belt tensioners but also cruise control, distance sensors, high-beam assist, lane-keeping support, rain sensors, and driver drowsiness detection. “Nowadays, there is hardly any area of automotive engineering that does not involve the use of microchips,” Fabrowsky says.

Having established a regional presence in 1906 in North America, the Bosch Group employs 34,700 associates in more than 100 locations, as of December 31, 2020. According to preliminary figures, Bosch generated consolidated sales of $13.1 billion in the U.S., Canada and Mexico. For more information, visit www.bosch.us, www.bosch.ca and www.bosch.com.mx.

The Bosch Group is a leading global supplier of technology and services. It employs roughly 394,500 associates worldwide (as of December 31, 2020). According to preliminary figures, the company generated sales of $87.1 billion in 2020. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. As a leading IoT provider, Bosch offers innovative solutions for smart homes, Industry 4.0, and connected mobility. Bosch is pursuing a vision of mobility that is sustainable, safe, and exciting. It uses its expertise in sensor technology, software, and services, as well as its own IoT cloud, to offer its customers connected, cross-domain solutions from a single source. The Bosch Group’s strategic objective is to facilitate connected living with products and solutions that either contain artificial intelligence (AI) or have been developed or manufactured with its help. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.” The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiary and regional companies in 60 countries. Including sales and service partners, Bosch’s global manufacturing, engineering, and sales network covers nearly every country in the world. The basis for the company’s future growth is its innovative strength. At 126 locations across the globe, Bosch employs some 73,000 associates in research and development, as well as roughly 30,000 software engineers.

Additional information is available online at www.bosch.us, www.iot.bosch.com, https://us.bosch-press.com, https://twitter.com/BoschPress

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