How does the bottom ball impact test machine accurately measure and record the temperature changes of samples?
Publish Time: 2025-06-10
In the safety assessment of power battery packs or systems, the bottom ball impact test machine is a key link. By simulating the bottom impact conditions that may be encountered during actual use, the test aims to assess the performance of battery products under extreme conditions to ensure their safety and reliability. During the entire test process, temperature, as an important parameter, not only reflects the state of the chemical reaction inside the battery, but also directly affects the safety performance of the battery.
The importance of temperature monitoring
The impact of temperature on power batteries is multifaceted. First, under normal working conditions, the battery will generate a certain amount of heat, which is due to the inevitable energy loss in the process of converting electrical energy into chemical energy. When the battery is subjected to external impact, it may cause internal short circuits or other failures, which in turn cause local overheating. If this situation is not controlled, it may lead to thermal runaway, and in severe cases, even fire or explosion. Therefore, accurately monitoring the temperature changes of the battery during the impact process is crucial to evaluating its safety performance.
Application of measurement technology
In order to accurately capture the temperature changes of the battery during the bottom ball impact process, modern bottom ball impact test machines usually use a variety of advanced temperature sensing technologies. Among them, the most commonly used are thermocouples and infrared thermometers.
Thermocouple: This is a sensor based on the Seebeck effect that can convert temperature differences into electrical signals for measurement. In the bottom ball impact test, the thermocouple can be directly installed on the battery surface or embedded in key locations inside the battery to monitor temperature changes in real time. The advantages of this method are fast response speed, high accuracy, and stable operation over a wide temperature range.
Infrared thermometer: The temperature is measured by using the relationship between the intensity of infrared radiation emitted by an object and its temperature. This non-contact measurement method is particularly suitable for occasions where direct contact is difficult or interference needs to be avoided. For example, when monitoring the temperature of a running battery, an infrared thermometer can provide instant temperature feedback without physical connection.
Data recording and analysis
In addition to accurate measurement methods, effective data recording and analysis are also key to ensuring the reliability of temperature monitoring results. Modern bottom ball impact test machines are equipped with high-performance data acquisition systems that can record data from various sensors at extremely high frequencies (thousands of times per second). These data include not only temperature, but also information in multiple dimensions such as voltage, pressure, displacement, and speed. Through comprehensive analysis of these data, researchers can more comprehensively understand the behavior patterns of batteries during impact, identify potential risk points, and optimize the design accordingly.
In summary, the bottom ball impact test machine integrates advanced temperature sensing technology and efficient data processing capabilities to accurately measure and record the temperature changes of power batteries under extreme conditions. This process not only helps to gain a deeper understanding of the working principles of batteries and their response mechanisms under abnormal conditions, but also provides a scientific basis for improving the safety of battery products.
