Temperature management is one of the keys to making electric vehicles reliable, efficient and durable. Precise temperature measurement is an important prerequisite for operating electric motors close to their performance limits, achieving high charging and discharging currents, while simultaneously improving battery life. Heraeus sensors accomplish this through the use of platinum thin-film technology. Platinum temperature sensors ensure exact temperature management by being precise, drift-stable, durable, and usable in measurement ranges up to 1.000° C. Why is it so essential to reliably monitor the temperature of electric vehicle components?
Measuring temperature in real time in every cell of the battery
Achieving uniform temperature in all individual cells of the battery is a major challenge. Maximum service life can only be ensured if the temperatures of individual cells do not vary from one another by more than two degrees Celsius. The temperature must therefore be measured directly on the cell in real time. Heraeus platinum sensors are positioned and interconnected on flex boards, and the elements can be positioned directly on the hotspots with self-adhesive film.
Helping to create the infrastructure for electromobility
Charging plugs have to handle high load currents, particularly during quick charging and with consistent charging power. The heat created in this process must be effectively dissipated to prevent the battery cells from overheating and being damaged. If the temperature exceeds 55° C, the load current must be reduced, which then lengthens the charging process. Heraeus pre-fits its sensors to circuit boards which can then be positioned on the existing pin design with heat-shrink tubing or a metal spring.
Key component of electric vehicles
The electric motor and the nearby power electronics are the key components of electric vehicles and therefore of the electromobility of the future. Consistent temperature, minimal mechanical forces such as vibration, and compact design are critically important in this area. Heraeus platinum sensors are equipped with a casing and are mechanically protected. Various setup options facilitate compact, direct positioning, for example inside the engine case.
Infobox: Heraeus at the Sensor China Expo 2018
Heraeus Sensor Technology is exhibiting various product solutions for the electromobility, automotive and household sectors, as well as circuit boards in heat and water meters at booth D019.