How to choose the special adhesive tape for battery energy storage?

The selection of special adhesive tape for battery energy storage requires comprehensive consideration of many factors, and the following are some key points:

adhesive property

Adhesion to different materials: A battery energy storage system usually involves a variety of materials, such as metal, plastic, battery pole pieces, etc. The adhesive tape should have good adhesion to these materials, so as to ensure a reliable connection between different parts and prevent the battery from being separated due to vibration and other reasons during use.

Initial tackiness and adhesion: The adhesive tape with good initial tackiness can quickly and firmly adhere to the surface of the adherend at the initial pasting stage, while adhesion ensures that the adhesive tape will not be degummed during long-term use. For battery energy storage system, especially in harsh environmental conditions such as high temperature and high humidity, the adhesion of adhesive tape is very important to ensure the stability and safety of battery module.

Electrical insulation performance

Insulation resistance: In battery energy storage system, adhesive tape is often used to isolate the anode and cathode of battery, battery module and external metal structure to prevent short circuit and leakage. Therefore, the adhesive tape should have a sufficiently high insulation resistance, which is generally required to be above 10 10 Ω to ensure the electrical safety of the battery system.

Dielectric strength: Dielectric strength refers to the ability of adhesive tape to withstand electric field without breakdown. Choosing the adhesive tape with high dielectric strength can effectively prevent the battery from breakdown under high voltage and ensure the normal operation of the battery system. Generally, the dielectric strength of adhesive tape is required to be not less than 10kV/mm..

chemical stability

Electrolyte resistance: The electrolyte inside the battery is usually highly corrosive, and the adhesive tape needs to be able to resist the corrosion of the electrolyte, and will not dissolve, swell and degum after contacting the electrolyte, thus ensuring the sealing and safety of the battery.

Anti-aging performance: during the long-term use of the battery energy storage system, the adhesive tape will age due to the influence of temperature, humidity, chemicals and other factors. Choosing a tape with good anti-aging performance can ensure its stable performance in the whole service life of the battery. Generally, it is required that after a long-term aging test, the decline of key indexes such as adhesive force and insulation performance of the tape should not exceed 30%.

thermostability

High temperature resistance: the battery will generate heat during charging and discharging, especially under high-rate charging and discharging or extreme environmental conditions, the battery temperature may rise to 80℃ or even higher. The adhesive tape needs to be able to maintain stable performance in high temperature environment, without softening, deformation, degumming and other phenomena. Generally, it is required that the adhesive tape can still be used normally in high temperature environment above 100℃.

Low-temperature performance: In low-temperature environment, the flexibility and adhesion of the adhesive tape may decrease, affecting its use effect. Therefore, it is necessary to choose a tape that can still maintain good performance at low temperature. Generally, it is required that the tape still has enough flexibility and adhesive force at a low temperature of-40℃ without brittle cracking and falling off.

security

Flame-retardant performance: The battery energy storage system has a certain fire risk, and once thermal runaway occurs, it may cause a fire. Therefore, the adhesive tape should have good flame retardant performance, which can extinguish itself quickly when it encounters an open flame to prevent the fire from spreading. Generally, the flame retardant grade of adhesive tape is required to reach UL94 V-0 or higher.

Low smoke and non-toxic: In case of fire, the smoke and toxic gas produced by burning the adhesive tape may cause serious harm to personnel and equipment. Choosing low-smoke and non-toxic adhesive tape can reduce the harm of fire accidents to a certain extent, ensure the safe evacuation of personnel and minimize the loss of equipment in an emergency.

Other factors

Thickness and width: according to the specific structure and application scenario of battery energy storage system, choose the tape with appropriate thickness and width. Generally speaking, the thinner adhesive tape can meet the requirements of bonding and insulation without increasing too much volume and weight, while the appropriate width can ensure that the adhesive tape can completely cover the parts that need bonding or insulation, thus improving work efficiency.

Cost: On the premise of meeting the performance requirements, the cost of adhesive tape needs to be considered. The price of different brands and models of adhesive tapes may be quite different, so the adhesive tapes with high cost performance should be selected according to the budget of the project and the specific requirements for the performance of the adhesive tapes.

Common brands of special adhesive tapes for battery energy storage are 3M, Desha, Ridong, etc. They have excellent performance in adhesion, electrical insulation and chemical stability, and can be selected according to specific needs.