목차
With the rise of economic level and average consumption capacity, there are more and more private cars on the road, which makes people pay more attention to gasoline as a traditional energy source. At the same time, exhaust emissions that obviously pollute the environment have also become a topic of discussion many times. How can we balance cars and the environment?
New energy vehicles came into being, and electric vehicles are a typical representative of new energy vehicles.
Electric vehicles (EVs) run on electric motors. BMS, the battery management system of electric vehicles, will install NTC thermistors to control the temperature of the motors, ensure the normal operation of the vehicle’s electronic systems, and avoid damage caused by excessive temperature changes.
In this article, we will carefully introduce what role NTC thermistors play in electric vehicles and what role they play.
Why NTC Thermistors in Electric Vehicles?
NTC (Negative Temperature Coefficient) thermistors are very sensitive to temperature changes. In electric vehicles traveling at high speeds, they can sense overheating and reflect the temperature at any time to ensure safe driving of electric vehicles. Here are some key points highlighting their uses and benefits:
Reason
Acute temperature sensing: NTC thermistors are very sensitive to temperature changes and are ideal for measuring, for example, engine management systems, climate control, and battery temperature monitoring.
Fast response time: NTC thermistors are small in size and low in thermal mass, which can help in real-time monitoring and control of automotive systems
Cost-effectiveness: NTC thermistors are relatively cheap to manufacture, which helps reduce the overall production cost of automotive parts.
Small size: Their small form factor makes them suitable for integration into sensors within the vehicle
Wide temperature range: NTC thermistors typically operate from -40°C to +125°C, suitable for a variety of automotive applications
What are the advantages of NTC thermistors for electric vehicles?
NTC thermistors are inexpensive, readily available temperature sensors. They are easy to use and adaptable. A total of 30 thermistors are currently used in electric vehicles, including 20 negative temperature coefficient (NTC).
장점
High sensitivity: The resistance value of NTC thermistors varies greatly with temperature, providing high sensitivity and accuracy for temperature measurement.
Linear response: They can be calibrated to provide a more linear response over a specific temperature range, improving their accuracy in temperature monitoring.
Stability and reliability: When properly designed and used within specified limits, NTC thermistors can provide stable and reliable performance, which is critical for automotive applications where failure could cause safety issues.
Low power consumption: NTC thermistors consume very little power, making them ideal for battery-powered applications such as electric vehicles and hybrid powertrains.
Versatility: They can be used in a variety of applications, including temperature compensation, circuit protection, and as part of a feedback loop in a control system.
How NTC thermistors are used in electric vehicles
Measuring motor temperature
To ensure the normal operation and service life of the motor, accurate temperature measurement and monitoring are essential. High temperatures can cause motor damage and pose a risk to new energy vehicles. To prevent this, NTC thermistors are used for motor winding temperature measurement, which can monitor the temperature of the motor winding in real time, so that protective measures can be taken for the motor in a timely manner.
Battery testing
Electric vehicles rely on batteries to operate. After long-term use, different batteries will produce different degrees of loss and heat, so it is necessary to test the temperature of each battery to avoid excessive loss of a single battery affecting other batteries, thereby causing safety hazards. NTC temperature sensors can perform high-precision and high-sensitivity temperature measurement, which is convenient for accurate measurement of battery temperature. At the same time, the temperature detection is carried out by combining internal and external temperature detection, which improves the accuracy of the detection results, is conducive to effective protection of the battery management system, and can also extend the service life of the battery.
Improve driving efficiency and range
Temperature management is not only about safety, it also affects the efficiency and range of electric vehicles.
- Battery temperatures that are too high increase internal resistance, resulting in reduced efficiency.
- Battery temperatures that are too low reduce the battery’s power output and slow charging.
NTC thermistors actively control temperature, keeping the battery within the optimal operating temperature range. They ensure that the battery operates at peak efficiency, providing maximum performance and increasing the range of electric vehicles.
결론
NTC thermistors play an irreplaceable role in electric vehicles. By monitoring and regulating temperature, they ensure the safety, efficiency and longevity of batteries in electric vehicles. As the electric vehicle market continues to develop and mature, thermistors will continue to be at the forefront of battery management systems, leading the next generation of sustainable and high-performance electric vehicles.
디티텍 is constantly innovating and developing a series of NTC thermistors that are more suitable for future electric vehicles. If you have any questions, please contact us or send an email to sales@dtttek.com and we will respond immediately.
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