How to choose high temperature adhesive tape suitable for new energy storage industry?

Choosing a high-temperature adhesive tape suitable for the new energy storage industry requires comprehensive consideration of many factors. The following are some suggestions:

Determine the temperature resistance requirements

Clear use scene temperature: The temperature in different parts of the new energy storage system is different, for example, the temperature inside the battery module is high during charging and discharging, while the temperature of peripheral components such as the battery management system is relatively low. It is necessary to select the high-temperature adhesive tape according to the temperature range of the specific use position to ensure that the adhesive tape can work stably for a long time in this temperature environment. Generally, the temperature resistance of the adhesive tape is required to be between 120℃ and 260℃.

Considering the impact of temperature change: the energy storage system will experience rapid temperature change during operation and stop, and the high-temperature adhesive tape needs to be able to withstand this thermal impact without cracking, falling off or viscosity reduction due to the rapid temperature change.

Evaluate insulation performance

Insulation strength: Because new energy storage involves high voltage and strong current, the selected high-temperature adhesive tape should have sufficient insulation strength to prevent current leakage and short circuit accidents. Generally, the insulation withstand voltage value of the required adhesive tape should be determined according to the voltage level of the system. For example, for the high-voltage energy storage system, polyimide high-temperature adhesive tape with high insulation withstand voltage value should be selected.

Volume resistivity and surface resistivity: these two indicators reflect the insulation performance of the tape. The higher the value, the better the insulation performance. When selecting, you should check the product specifications and choose the high-temperature adhesive tape whose resistivity meets or exceeds the industry standard.

Examine chemical stability

Compatibility of contact materials: the battery in the energy storage system may leak electrolyte, and some chemicals may exist in the surrounding environment. High-temperature adhesive tape needs to have good compatibility with these substances, and will not be corroded, dissolved or chemically reacted by chemicals such as electrolyte, resulting in performance degradation. For example, Teflon high-temperature adhesive tape has excellent corrosion resistance, can resist the corrosion of many acids, alkalis and solvents, and is suitable for parts that may come into contact with chemicals.

Long-term chemical stability: Considering the long-term use of the energy storage system, the high-temperature adhesive tape should maintain chemical stability throughout the service life cycle, and it will not gradually age and deteriorate due to long-term contact with chemicals, which will affect its insulation, fixation and other functions.

Measure mechanical strength

Tensile strength: During the production, transportation and operation of energy storage equipment, high-temperature adhesive tape may be subjected to tensile force. The adhesive tape with high tensile strength should be selected to ensure that it will not break easily when stretched and ensure the reliability of its fixation and connection. For example, fiber tape has high tensile strength and deformation resistance, and is suitable for parts that need to bear certain tension.

Tear resistance: The vibration and collision of equipment may cause the tape to tear. Good tear resistance can keep the tape intact when it is impacted by external force and continue to play its role. Like some high-temperature tapes based on high-strength films, such as polyimide high-temperature tapes, they have good tear resistance.

Pay attention to sealing performance

Adhesiveness: The high-temperature adhesive tape should be able to closely adhere to the sealed surface, effectively fill the gaps, and prevent dust, moisture, gas, etc. from entering the energy storage system. For example, silicone high-temperature adhesive tape with good flexibility and viscosity can meet the sealing requirements of different shapes and surfaces and ensure the sealing effect.

Long-term sealing: The selected adhesive tape should maintain stable sealing performance during long-term use, and it will not lead to sealing failure due to temperature change, vibration and other factors. Some specially designed sealing tapes, such as high-temperature tapes with sponge or foam backing, can compensate the dimensional changes caused by temperature and pressure changes to some extent and maintain long-term sealing effect.

Considering the convenience of operation

Stickiness and adhesiveness: The adhesive tape should have proper stickiness, which can not only be quickly and firmly attached to the surface of the object when it is pasted, but also be easily removed when it needs to be replaced or adjusted, without leaving glue stains. For example, pressure-sensitive high-temperature adhesive tape, such as 3M™ VHB™ tape, can be bonded simply by pressing, and its viscosity is durable, and it is easy to take off without damaging the surface of the adhered object.

Machinability: According to the actual use requirements, the high-temperature adhesive tape may need to be cut and die-cut. Choosing easy-to-process adhesive tape can improve production efficiency and reduce processing cost. For example, PET high-temperature adhesive tape has good die-cutting, and can be accurately processed according to different shapes and sizes.

Combining cost and supply

Cost factor: There are differences in the prices of different types and brands of high-temperature adhesive tapes. Under the premise of meeting the performance requirements, we should comprehensively consider the cost factor and choose products with high cost performance. At the same time, it is necessary to consider the service life and replacement cost of the adhesive tape, and it may be more economical to choose the adhesive tape with reliable quality and long service life in the long run.

Supply stability: ensure that the selected suppliers of high-temperature adhesive tapes have stable production capacity and supply capacity, and can meet the production schedule and consumption demand of new energy storage projects. In addition, a good supplier should also be able to provide timely technical support and after-sales service to help solve the problems encountered in the use process.