The advantages of temperature sensors in monitoring temperature in the high-voltage direct current charging system

With the popularization of electric vehicles, the high-voltage direct connection charging system, an efficient charging method, has been widely applied. However, due to its characteristics of high voltage and large current, a large amount of heat is generated during the charging process. If not effectively monitored and controlled, it may lead to equipment damage, shortened battery life, and even safety accidents. Therefore, temperature sensors are crucial in the temperature monitoring of high-voltage direct connection charging systems.-Temperature sensor

How to Select and Configure Temperature Sensors

1. Sensor Types

Thermistor type: Such as NTC thermistors, their resistance values decrease as temperature rises. They have the advantages of fast response and small size, and are suitable for applications with high requirements for response speed. For example, TDK's L860 surface mount NTC thermistor can be directly embedded in IGBT power modules to achieve fast and accurate temperature measurement and control.

Platinum resistance type: Such as Pt1000, their resistance values increase linearly with temperature. They have high measurement accuracy and good stability, and are often used in parts with high requirements for measurement accuracy, such as the power terminals and connectors of charging guns.

2. Configuration Locations

Charging gun: Install temperature sensors such as Pt1000 at key parts of the charging gun, such as the power terminals and connectors, to monitor the temperature changes of the charging gun during operation in real time and prevent damage caused by overheating.

Inside the charging pile: Arrange temperature sensors on key components of the charging pile, such as power modules, busbars, and cooling systems, to comprehensively understand the temperature distribution inside the charging pile and promptly identify potential overheating risks.

At the interface between the battery management system and the high-voltage direct connection charging system: Install temperature sensors at the interface where the battery management system connects to the high-voltage direct connection charging system to monitor the heat exchange between the battery and the charging system during the charging process and ensure the safety of the charging process.

The Role of Temperature Monitoring in High-Voltage Direct Charging Systems

1. Ensuring Charging Safety

During the charging process, if the temperature sensor detects an abnormal increase in temperature at critical parts, the monitoring system can take timely measures, such as reducing the charging power or stopping the charging, to prevent safety accidents such as fires caused by overheating.

When the temperature of the charging gun reaches the preset alarm threshold, the charger can generate a fault record and light up the fault indicator to alert the user and limit the output power according to the power limitation formula; if the temperature reaches the temperature for stopping charging, it will automatically stop charging.

2. Extending Equipment Lifespan

By continuously monitoring the temperature and effectively controlling it, the equipment can be prevented from being in a high-temperature state for a long time, reducing wear and aging, and thus extending the service life of the charging gun, charging piles, and other equipment.

3. Optimizing Charging Efficiency

Under the premise of ensuring safety, the monitoring system can dynamically adjust the charging power based on the data from the temperature sensor, keeping the charging process within the optimal temperature range, thereby improving charging efficiency.

4. Enhancing User Experience

The temperature monitoring system can provide real-time feedback on the temperature status of the charging equipment to users, allowing them to have a more intuitive understanding of the safety of the charging process. At the same time, by optimizing charging efficiency, it can also reduce the user's charging waiting time and enhance the user experience.

Temperature sensors play a crucial role in temperature monitoring in high-voltage direct charging systems. By rationally selecting and arranging temperature sensors and building a complete temperature monitoring system, charging safety can be effectively guaranteed. The temperature sensors produced by Yuanben Company have a wide temperature measurement range, good resistance interchangeability, good stability, high accuracy, fast response, high voltage resistance, and multiple temperature scale specifications to choose from, as well as diversified installation methods. They are the best choice for high-voltage direct charging systems.