In the current era of vigorous development of new energy vehicles, the battery coating process, as a key link to ensure battery performance and safety, is experiencing profound technological innovation. With the continuous improvement of consumers' requirements for the range, charging speed and safety performance of new energy vehicles, the quality of the battery coating process directly affects the quality of the battery and even the vehicle.

Taking the UV coating process as an example, the UV insulating battery coating (EvoProtect 455 UV) developed by Lankwitzer's Lanwei Paint (Shanghai) Co., Ltd. has performed well in the industry. The coating can achieve ultra-fast curing in less than 5 seconds through ultraviolet irradiation, which greatly improves production efficiency. In the large-scale production of power batteries, fast curing means that a large number of cells can be coated in a short time, meeting the urgent demand of the market for battery capacity. Moreover, it supports automated production, enabling continuous production lines without human intervention, effectively reducing the impact of human factors on product quality, ensuring the consistency and stability of each cell coating. This automated and efficient production model is leading the development of new energy vehicle battery coating processes to a higher level.

Compared with the traditional PET \"blue film\" coating process, the UV coating process has obvious advantages. As a substitute for \"blue film\", the all (high) solid-containing UV insulating coating developed by Hunan Dijing New Materials Co., Ltd., has better performance in insulation, voltage resistance, wear resistance, weather resistance, and anti-aging. \"Blue film\" is prone to aging and falling off during long-term use, which in turn affects the insulation effect of batteries. With good adhesion and stability, UV battery coatings can provide more durable and reliable protection for power batteries. In the face of the structural changes of the new generation of power batteries, such as the direct bonding of the battery cells to the PACK cover or the body chassis, when the shearing force requirements for the battery cells are increased to 9-15MPa, the PSA adhesive adhesive bonding performance of the blue film is only at the level of 0.5-2MPa, and the adhesive strength of the structural adhesive on the blue film is also at the medium and low level of 2.0-3.5MPa, which is difficult to meet the demand. The UV coating process can effectively cope with it, and the coating formed after curing has a high shear strength. For example, the shear strength of Lankwitzer's related products is greater than 12MPa, which can better adapt to the new battery structure design.

In addition, the inkjet printing technology of the battery cell insulation layer is gradually emerging as an emerging process. This technology has the advantages of high material utilization rate, high product yield, and good performance. For example, the 100% solid-containing UV-curable battery insulation coating developed by Matsui Co., Ltd. is combined with the series ONEPASS printing process of SanDi Digital, and the production beat can be increased to 40PPM or even higher. The yield of the manufacturing section reaches 99% +, and the material utilization rate is nearly 100%. This process can not only improve the safety of the battery cell, isolate the oxygen and moisture in the external environment, improve the thermal stability and corrosion resistance, but also increase the battery cell capacity, reduce the blue film closing and stacking occupation, and improve the overall space utilization.

The technological innovation of the new energy vehicle battery cell coating process is improving battery performance and safety from multiple dimensions, driving the new energy vehicle industry towards a more efficient, safer, and more environmentally friendly direction.