With the continuous development of mobile electronic terminal equipment, the development of lithium-ion batteries has brought strong impetus and a broad market, at the same time, the development of new energy power vehicles, the guidance and support of the national new energy industry policy, many places will take new energy lithium batteries as a breakthrough in the transformation and upgrading of new industries, so lithium batteries have developed rapidly. Lithium battery tape is widely used in lithium-ion batteries, playing the role of insulation and fixation, and is an indispensable important material for lithium-ion batteries. This article will take you to learn about the different classifications and uses of lithium battery tape, welcome to collect and forward

1. What is lithium battery tape?
Lithium battery tape refers to the pressure-sensitive adhesive tape used for electrode winding, pole piece protection and core termination in the middle production process of lithium battery cells (winding/lamination, shell welding and sealing processes, etc.), and its main role is to play the role of insulation and fixation on lithium batteries.
Due to the harsh requirements of the use environment, lithium battery tape needs to have certain initial adhesion, stickiness, temperature resistance and chemical corrosion resistance, and can be used repeatedly without pollution, and there is no pollution to the surface of the adherent object after peeling.

Lithium battery tape is divided into lithium battery tape with different characteristics in order to meet the needs of different parts of lithium batteries, different efficacy requirements, different performance standards and different production companies.
2. Classification of lithium battery tapes
The characteristics of lithium battery tape are mainly determined by factors such as substrate, adhesive and use, so lithium battery tape is generally classified according to substrate, adhesive and use.
1. The base material of lithium battery tape
The substrate is the carrier in the lithium battery tape, which affects the temperature and use range, tensile resistance, shear resistance and material cost of the lithium battery tape. Polymer film has become a common carrier substrate for lithium battery tape because of its excellent properties such as dimensional stability, high elasticity, good insulation, good acid and alkali resistance, good tear strength and plasticizer resistance.

Common substrates are BOPP (biaxially oriented polypropylene film), PET (high-temperature resistant polyester film), PI (polyimide film), etc.
The temperature resistance of the substrate determines the upper limit of the use temperature and environment of the lithium battery tape, the temperature resistance of the PI substrate> PET substrate > BOPP substrate, the PI substrate has the best temperature resistance, and the BOPP substrate has the worst temperature resistance. The cost of substrate is the opposite of temperature resistance, the cost of BOPP lithium battery tape is relatively the lowest, and the cost of PI lithium battery tape is relatively highest.
2. Adhesive for lithium battery tape
The composition of the adhesive determines the characteristics and uses of lithium battery tape, and the commonly used adhesives are acrylic adhesives, rubber adhesives, etc.

Lithium battery tapes prepared from different adhesives have different properties:
The acrylic lithium battery tape prepared with acrylic adhesive has good aging resistance and weather resistance, high temperature resistance and good thermal stability, good adhesion to polar surfaces, small adhesion to non-polar surfaces, and low initial peel strength. The rubber lithium battery tape prepared with rubber adhesive has higher shear resistance at high temperature, can be pasted with various surfaces, and good initial adhesion, but has poor aging resistance and solvent resistance.
Three. Classification of lithium battery tapes
1. Lithium battery termination tape

Aluminum foil fiberglass tape

Lithium battery termination tape refers to the pressure-sensitive adhesive tape used for electrode winding and core termination in the winding/lamination process of lithium battery cell middle section.
In addition to the general performance of pressure-sensitive tape, this kind of tape also has special requirements in substrate selection, adhesion, temperature resistance and electrolyte resistance, etc., and is a type of pressure-sensitive tape that is widely used in batteries.
2. Lithium battery high temperature resistant tape
Lithium battery high-temperature resistant tape is a kind of battery tape developed in order to make lithium batteries have good stability under high-temperature extreme conditions such as production and use, and require lithium batteries to be able to maintain stable structure and chemical properties for a long time in high-temperature environments, so as to ensure that lithium batteries do not have short circuits, no leakage and liquid leakage in high-temperature environments.
The original high-temperature resistant tape for lithium batteries was silicone silicone tape, but in recent years, the lithium battery industry has proposed that the battery cell cannot contain silicon elements, so most of the high-temperature resistant tapes used on the market are acrylic battery tapes.
3. Double-layer lithium battery protective film tape
The lithium battery shell is hard and the water chestnut angle is distinct, and the lithium battery tape that protects the edging is required to have softness, strong viscosity, good fit and no warping for a long time, this kind of tape is called double-layer lithium battery protective film tape.
Wanzhongliang and others make the tape softer while being wear-resistant and tough through the composite structure of double-layer PET film and double-layer adhesive layer; By coating the high-viscosity modified acrylic adhesive with phenolic resin, the viscosity is stronger, so as to achieve better adhesion of the tape, not easy to warp, and bake at 130°C for more than 0.5h without residual glue, which can better protect the battery.

4. Power battery tape
Power battery tape is a battery tape that uses PET film as the base material and is coated with non-silicone pressure-sensitive adhesive (acrylic glue or rubber glue) on PET film, which is used for the shell of electric vehicle flexible packaging power battery, the battery cell arranged in the shell, the top cover of the cover sealing shell, the top surface of the cell, the two sides and the bottom surface of the battery tape.
5. Lithium battery protective film
The lithium battery protective film tape is mainly based on PET film and BOPP film, coated with acrylic glue, which is used for pasting and protecting the surface of the aluminum-plastic film in the production process of pouch batteries and polymer lithium cells. It is characterized by high cleanliness, moderate viscosity, no warping when pasting aluminum-plastic film, no damage to the bar code, high temperature resistance without residual glue, scratch resistance, puncture resistance, and the product meets ROHS standards.
epilogue
With the improvement of existing materials and battery design technology and the emergence of new materials, the application range of lithium ion continues to expand, and lithium battery tape has broad development prospects as one of the necessary materials in the production and manufacturing of lithium batteries. In the future, it will be widely used in mobile communication tools and equipment, as well as electric vehicles, and its potential demand is huge.