How to choose the blue film adhesive tape suitable for battery energy storage?

Choosing the blue film adhesive tape suitable for battery energy storage requires comprehensive consideration of many factors. The following are some suggestions:

Considering the battery type and application scenario

Battery type: Different types of batteries, such as lithium-ion batteries and lead-acid batteries, have different performance requirements for the blue film adhesive tape. For example, lithium-ion batteries usually need blue film adhesive tape with better corrosion resistance and insulation performance of electrolyte, so as to prevent the influence of internal short circuit and electrolyte leakage on battery performance and safety.

Application scenario: If it is used in electric vehicles and other fields with high safety requirements, the blue film adhesive tape needs to have high temperature resistance, puncture resistance, high insulation and other properties to ensure the stable operation of the battery under various complicated working conditions and prevent safety accidents caused by the failure of the adhesive tape; For some relatively fixed application scenarios, such as energy storage power stations, the weatherability and long-term stability of the blue film tape are more important to ensure that the battery is not affected by external environmental factors during long-term use.

Pay attention to the performance parameters of adhesive tape

Insulation performance: the insulation resistance of the blue film tape should be high enough to prevent short circuit between the positive and negative electrodes of the battery or between the battery and external metal parts, and ensure the electrical safety of the battery system. Generally speaking, the insulation resistance should reach several gigaohms or even higher.

Voltage resistance: It should be able to withstand the high voltage generated during the charging and discharging process of the battery, so as to avoid the breakdown of the adhesive tape caused by too high voltage, which may lead to battery failure or safety problems. The voltage of different battery systems is different, so the blue film adhesive tape with corresponding voltage resistance grade should be selected according to the specific battery voltage.

Adhesion performance: The blue film adhesive tape should have good adhesion strength and can be firmly adhered to the surface of the battery or other parts to prevent problems such as tape falling off and edge warping during use, which will affect the fixing and insulation effect of the battery. At the same time, the adhesiveness of the adhesive tape should be durable and stable in different environmental conditions.

Temperature resistance: the battery will generate heat during charging and discharging, especially in some batteries used in high-rate charging and discharging or high-temperature environment. It is required that the blue film adhesive tape has good high-temperature resistance, and can maintain its physical properties and chemical stability at high temperature without deformation, softening and viscosity reduction. In addition, in low temperature environment, the adhesive tape should be flexible and not brittle or cracked to ensure its normal use.

Mechanical properties: It has good tensile strength, puncture strength and abrasion resistance, so as to prevent the adhesive tape from being damaged due to external force pulling, collision or friction during battery assembly, transportation or use, which will affect its insulation and protection functions.

Consider the material and structure of the tape.

Substrate material: Common blue film tape substrates are PET, PVC, etc. PET substrate has excellent mechanical properties, electrical insulation and chemical stability, high temperature resistance, wear resistance and high transparency, which is convenient for observing the battery surface; PVC substrate has good flexibility and corrosion resistance, and the cost is relatively low. The suitable substrate can be selected according to the specific use requirements and budget.

Material of adhesive layer: The material of adhesive layer directly affects the adhesive performance and chemical resistance of adhesive tape. Acrylate adhesives have good adhesive strength, weather resistance and chemical stability, and are commonly used as adhesive materials for blue film tapes. In addition, some special adhesives may have flame retardant and antistatic functions, and can be selected according to actual needs.

Pay attention to environmental protection and safety

Environmental protection requirements: With the improvement of environmental awareness, it is very important to choose the blue film tape that meets environmental protection standards. Priority should be given to the selection of adhesive tapes containing no or low volatile organic compounds (VOC), heavy metals and other harmful substances to reduce the impact on the environment and human health.

Safety: The blue film adhesive tape should have good flame retardant performance, so as to prevent the adhesive tape from playing a certain flame retardant role when the battery fails or catches fire, delay the spread of fire and improve the safety of the battery system; In addition, some application scenarios may require anti-static function of adhesive tape to avoid potential safety hazards caused by static accumulation.

Considering cost and operability

Cost factor: On the premise of meeting the performance requirements, the procurement cost, use cost and maintenance cost of the blue film tape should be comprehensively considered. The price of different brands and specifications of blue film tape may be different, so it can be reasonably selected according to the project budget; At the same time, the service life and replacement cycle of adhesive tape should be considered to evaluate its long-term use cost.

Operability: Choosing the blue film adhesive tape with simple operation and easy construction can improve the production efficiency and reduce the labor cost. For example, the first generation of blue film adhesive tape can be directly attached, which is convenient to operate, while the second generation of blue film adhesive tape has better performance, but it needs to go through specific operation processes such as UV irradiation start-up and curing, which has certain requirements for equipment and technology, and needs to be weighed according to actual production conditions.

Refer to supplier reputation and product certification

Supplier reputation: Choosing a supplier with good reputation and word of mouth can guarantee the quality of products and after-sales service. We can evaluate the credibility of suppliers by consulting their historical performance, customer evaluation and industry popularity.

Product certification: ensure that the blue film adhesive tape has passed the relevant quality certification and standards, such as UL certification and RoHS certification. These certifications are a recognition of product performance and quality, and can provide some reference for selection.