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NTC temperature sensor used in hybrid / electric vehicles

The importance of NTC thermistors to a product is like human hands. Without them, people can live, but they can’t do anything! This hand has to be sensitive!
Tips: The most important thing for NTC thermistors is life! After withstanding various high-precision, high-sensitivity, high-reliability, ultra-high temperature, and strong pressure tests, it still works stably for a long time.

Therefore, you must first use: Long-life NTC thermistor! This way you can guarantee long-life electrical products. The reason is simple. No one’s life is gone, no matter how capable it is.

Airmate rice cookers, Estar thermometers, Pinson rechargeable batteries, and other brands are using this standard to select NTC thermistors.

Hybrid / pure electric vehicles are needed in the domestic situation

At present, “energy saving and emission reduction” is one of the main directions for the development of the global industry. On the one hand, it refers to the need to continue to develop “energy saving and emission reduction” technologies for internal combustion engine 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 directions. (Very significant)

Undoubtedly, internal combustion engine vehicles will occupy a relatively large proportion of applications for a long time, which requires further optimization of internal combustion engine technology so that its fuel consumption can be reduced by about 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 High temperatures in batteries and drivers in electric vehicles can also be dangerous at any time. These are important issues that need to be addressed worldwide. (Battery performance requirements and safety issues must be addressed)

Application of NTC temperature sensor in three aspects of automotive

The sensors used in hybrid / electric vehicles mainly include sensors that detect battery temperature, temperature sensors that monitor motors, and temperature sensors used in battery cooling systems.

NTC temperature sensor for [battery] temperature detection

The battery of a hybrid / electric vehicle can provide the best energy output (purpose) only at a precisely defined (premise) operating temperature, so it is required to reliably monitor and adjust the battery temperature to prevent the battery from overheating and maximize Ground to extend its working life (life is very important, no matter what electrical appliances). Most current hybrid / electric vehicle battery designs use NTC temperature sensors to measure their temperature. In particular, temperature sensors for battery modules need to be able to meet the requirements of mass production of automobiles for various environmental requirements such as humidity, dew and mechanical pressure. (In special conditions to meet the temperature sensor
Play a role, put forward new challenges to its performance! )

NTC temperature sensor for [electric motor] temperature detection

Electric motors are another basic element of hybrid / electric vehicles. In order to ensure the long life and the best performance of the motor, the temperature of the electric motor also needs to be continuously monitored and operated as accurately as possible above 140 ° C. Therefore, it is also important to determine the temperature of the stator windings. This is the only way to allow the motor to take full advantage of it without the risk of overheating. Three goals need to be accomplished here:

1. To measure the temperature of the stator,
2. The sensor should be easy to install
3. To ensure that the sensor is protected from mechanical stress during installation and operation and has a high dielectric strength, the latter can prevent arcing between the driver current circuit and the measurement current circuit.

For this reason, the temperature sensor for the motor must have the high dielectric strength required to be directly embedded in the stator coil frame. By using a cast NTC sensor element, the sensor can withstand high temperatures up to 200 ° C and obtain extremely short response times , Very strong and durable under mechanical pressure, and easy to install.
(NTC thermistors need to meet very high conditions here:
1. High temperature resistance of 200 degrees 2. Very short response time 3. Extremely high pressure resistance 3. To facilitate installation 5. High media
Electric strength

Where to start?

In addition, in practical applications, because the battery and driver are also important safety components of hybrid / electric vehicles, the requirements for the reliability and shock resistance of the sensor are also high. Start with other aspects to provide the best comprehensive solution.
(NTC temperature sensor must also meet: 1. Reliability 2. Shock resistance)

The root of the problem finally comes down to the process and reliability performance testing of NTC sensors.

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