By using thermistor in battery circuit, excessive or overheating of current can be detected, and the charging rate can be adjusted accordingly. As a result, the current of the battery at the beginning of charging will be relatively large , so that it can be quickly charged with a relatively large charging current in a relatively short time. When the current or temperature reached their critical value, the charging speed can be controlled to decrease, and then the charging will continue at a steady rate.
The smaller size of the computers challenges engineers. The mainboard of computer is very sensitive to temperature, and it is very close to the heating circuit. The ever-increasing CPU frequency not only improves the speed of CPU, but also makes its working temperature higher. In this case, the surface mount thermistor can not only respond quickly to protect against overheating, but also be easy to use, but sometimes it is impossible to install the thermistor at the required position. However, the temperature sensitive component can be placed at a specific sensitive point by combining the surface packaged thermistor and stripline with a special shape, which further improves the protection.
The temperature control technology is used in food and medicine industries to ensure the quality of products during transportation. In order to prevent partial or total loss of the effectiveness of medicine, the temperature need to be precisely controlled. At the same time, the temperature recorder constantly moniters the conditions. Therefore, thermistor medical applications are very crucial to monitor the temperature. A typical recorder may be a set of test cards placed in different positions, which may contain internal thermistor components, external thermistor probes, or both.
Thermistors have been widely used to measure the temperature of water for a long time. Now, there are many new applications. For example, it is used in luxury cars, and this will soon become a mainstream application of thermistors. Nowadays, higher requirements are put forward for thermistor industry: smaller size, higher stability, better high temperature test performance, and so on, and progress has been made in these aspects. On the basis of these advances, there will be many newer applications, including more accurate monitoring of patient temperature, micro temperature difference sensors, car temp sensors for improving fuel efficiency, and so on. Looking back on the progress of thermistor application in the past 200 years, it is believed that the current progress in thermistor industry and research can certainly meet the various demands of electronic industry at present and in the future.
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