1. Physical Tension Test
Physical tension test is a common method to measure the firmness of the seal of the Button Battery Sealing Machine. Through a specially designed tension test device, a clamp connected to the sealing part of the button battery is fixed, and then tension is applied at a steady speed. Observe at what tension the seal will break, separate or deform. For example, if a button battery can withstand a tensile force of more than 10 Newtons after being sealed by a sealing machine without obvious damage to the sealing part, it can be preliminarily considered that its seal has a certain firmness. This tension value needs to determine a suitable standard range based on the specific type, size and usage scenario of the button battery. When conducting a tension test, ensure that the direction of the tension is perpendicular to the sealing plane to simulate the external force that may be encountered in actual use.
2. Vibration and impact test
Button batteries may be subject to vibration and impact during actual use, so the measurement of the firmness of the seal also needs to consider this factor. In the vibration test, the button battery is fixed on the vibration table, and different vibration frequencies and amplitudes are set to simulate situations such as bumps during transportation or slight vibrations inside the device. After a certain period of vibration, check whether the seal is loose, open, or the internal material of the battery leaks. The impact test simulates the situation where the battery is suddenly hit, such as free fall from a certain height to a specific impact surface. If the seal of the button battery is still intact after these vibration and impact tests, it means that the firmness of the seal can meet the requirements of actual use.
3. Temperature cycle test
Temperature changes will affect the firmness of the button battery seal. In the temperature cycle test, the button battery is placed in an environment with changing temperature, such as multiple cycles from a low temperature of -20°C to a high temperature of 60°C. Since different materials will expand and contract when the temperature changes, this may cause stress on the seal. If the seal can remain intact during the temperature cycle, without sealing damage or structural deformation caused by thermal expansion and contraction, it means that the seal has good firmness in terms of temperature adaptability. This test can reflect the stability of the seal firmness when the button battery is used at different ambient temperatures.
4. Long-term stability test
In order to comprehensively measure the firmness of the seal of the Button Battery Sealing Machine, a long-term stability test is essential. The button battery is placed in a simulated actual use environment (such as a certain humidity, air pressure, etc.) and continuously observed for a period of time, which may be months or even years, depending on the expected service life of the button battery. During this process, the state of the seal is regularly checked, including whether there is any change in appearance, whether there is any material leakage inside the battery, etc. If the seal remains firm throughout the long-term observation period and there are no problems that affect the battery performance and safety, then it can be considered that the seal firmness formed by this sealing machine is reliable and can meet the requirements of button batteries in long-term use.
