At present, "energy saving and emission reduction" is one of the main directions of global industrial development. This aspect refers to the need to continue to develop the "energy saving and emission reduction" technology of internal combustion engines. On the other hand, it refers to the need to strengthen the development of new energy vehicles. Among them, hybrid / pure electric vehicles are the main direction. Needless to say, internal combustion engine vehicles will occupy a relatively large proportion of applications in a long period of time, which requires further optimization of internal combustion engine technology so that fuel consumption can be reduced by another 30%. At the same time, another conversion trend worthy of attention is the development of electric vehicles. The biggest challenge now is that the battery still has major problems such as too large, too expensive, too heavy, and insufficient travel. In addition, hybrid / pure Excessively high temperatures of batteries and drivers in electric vehicles may also be dangerous at any time, and these are important issues that need to be resolved worldwide.
Cui Pengbo, senior manager of NTC and sensor product marketing department of EPCOS Greater China under TDK Group
The sensors used in hybrid / electric vehicles mainly include sensors that detect the temperature of the battery, temperature sensors that monitor the motor, and temperature sensors used in the battery cooling system. The battery of a hybrid / electric vehicle can provide the best energy output only at a precisely defined operating temperature. Therefore, it is required to reliably monitor and adjust the battery temperature to prevent the battery from overheating and maximize its working life. Most current hybrid / electric vehicle battery designs use NTC temperature sensors to measure their temperature. TDK Group's EPCOS special screw type M703 series temperature sensors for battery modules are optimized for various environmental requirements such as humidity, dew and mechanical pressure, and have been verified to meet the requirements of automotive mass production. .
Electric motors are another basic component of hybrid / electric vehicles. In order to ensure the long life of the motor and exert its best performance, the temperature of the electric motor also needs to be continuously monitored, working as accurately as possible in the temperature range above 140 ° C, so it is also crucial to determine the temperature of the stator winding , This is the only way that the motor can take full advantage of its advantages without risk of overheating. In order to measure the temperature of the stator, it is also required that the sensor should be easy to install, and ensure that the sensor is protected from mechanical pressure and has a high dielectric strength during installation and operation. The latter can prevent the driver current circuit from measuring the current circuit. Flashover phenomenon. For this reason, the new EPCOS temperature sensor E1541 series for motors has the high dielectric strength required to be directly embedded in the stator coil holder. By using cast NTC sensor elements, the sensor can withstand high temperatures up to 200 ° C And get a very short response time, very strong and durable under mechanical pressure, and easy to install.
In addition, in practical applications, since the battery and the driver are also important safety components of the hybrid / electric vehicle, the reliability and shock resistance of the sensor are also high. Start with other aspects to provide the best comprehensive solution.
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