The temperature sensor in the use of electric cars

Sensor as a pure electric vehicle electronic control system of the information source, are key components in pure electric vehicle electronic control system, electric automobile sensor is the core content of the electric car electronic technology research one of. At present, a common household car about install hundred sensors, and luxury cars sensors can reach more than two hundred only.

in the used in the sensor of electric vehicle (ev) mainly includes testing battery temperature sensor and monitor the temperature sensor of the motor, as well as temperature sensor for the battery cooling system, etc. Hybrid electric vehicle battery only under precisely defined working temperature can offer the best energy output, therefore required to reliably battery temperature monitoring and adjustment, in order to prevent the batteries overheating, maximum limit prolong its working life.

at present most of the hybrid electric vehicle battery design will be a temperature sensor, in order to measure the temperature. Used for battery module of special screw type temperature sensor for a variety of environmental requirements such as humidity, dew and mechanical pressure has been optimized, and verified, can satisfy the requirement of mass production.

electric motor is also another basic components of hybrid electric vehicle. In order to ensure the long life of the motor and doing its best performance, the temperature of the electric motor also needs to continue to be monitored, as accurate as possible at temperatures higher than 140 ℃ within the scope of work, and thus determine the temperature of the stator winding is crucial, it is to make the motor can be at risk from overheating and the only way to make full use of all advantages.

in order to measure the temperature of the stator, the sensor is also required by the ease of installation, and to ensure that the sensor in the process of installation and operation from the effect of mechanical stress and high dielectric strength, which can prevent the drive current circuit to measure the current circuit between flashover phenomenon.

to this end, the new temperature sensors used for motor has direct embedded stator coil frame required high dielectric strength, through the use of the casting of the sensor element, the sensor can be resistance up to 200 ℃ high temperature and have a very short response time, under the mechanical stress is very strong and durable, and easy to install.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor