[report] last year, China shipped 1.66 billion square meters of lithium coated diaphragms, driving 15500 tons of coating materials

Recently, evtank, a research institution, and IVI Economic Research Institute jointly released the white paper on China's lithium ion battery diaphragm industry (2020). In the white paper, evtank made a detailed analysis of the lithium ion battery diaphragm coating material market. According to the research data of the white paper, in 2019, the shipments of lithium-ion battery coated diaphragms in China were 1.66 billion square meters, accounting for 55.7% of the total diaphragm shipments. According to the white paper, the coated diaphragms in 2019 were mainly wet coated diaphragms, amounting to 1.56 billion square meters, accounting for 78.0% of the total wet diaphragm shipments, and the proportion was further increased.

The increase in the proportion of coated diaphragms and the increase in shipments further drove the increase in shipments of coating materials. According to the white paper on China's lithium ion battery diaphragm industry (2020), in 2019, the shipment of inorganic materials used for diaphragm coating was 14000 tons, including 8000 tons of high-purity alumina materials and 6000 tons of boehmite materials. The shipment of PVDF, an organic material used for diaphragm coating, is 1500 tons.

According to the white paper released by IVI Economic Research Institute, the current domestic mainstream suppliers of high-purity alumina materials include Zhejiang Jidun, Tianma new materials, core technology Zhonglian, Shanghai Huaming Gaona, Lianlian chemical, guoci materials, Qinghai shengnuo, etc. The main suppliers of boehmite include one stone, Chalco Zhengzhou Research Institute. PVDF mainly depends on imports, and the market is still monopolized by foreign enterprises such as French Arkema, American Solvay and Japanese Wuyu.(source:Battery hundred people Association - battery network）

[interaction] Sinoma Technology: currently 7 μ M diaphragm has been the first in the industry to achieve mass supply to strategic large customers

Recently, Sinoma Technology (002080) said in an interactive exchange with investors that Hunan Zhongli, the holding subsidiary of the company, is a leading and large-scale wet diaphragm and coating diaphragm solution provider in China. It has internationally advanced wet diaphragm manufacturing and testing equipment, focuses on the import substitution of diaphragm products, and is the main supplier of mainstream power battery enterprises at home and abroad. The company's products have 5-16 μ M batch supply capacity of a full range of base films and coating products, currently 7 μ M diaphragm has been the first in the industry to achieve mass supply to strategic large customers. (source: battery bairenhui battery network)

[analysis] the production capacity of wet diaphragm has increased rapidly, and the global demand for power diaphragm is improving

The pattern of wet diaphragm has been basically established, and the industry capacity has increased rapidly. Judging from the current trend of diaphragm industry, wet diaphragm in power field will become the mainstream technology type, and the pattern has been basically established. In addition, according to the production expansion of major diaphragm enterprises at present, the capacity planning of wet technology has also become the mainstream. We predict that by the end of 2020, the total production capacity of mainstream diaphragm enterprises will reach 6.8 billion square meters, including 6.16 billion square meters of wet diaphragm.

Looking at the world, the development of the new energy vehicle market is accelerating, and the European market will continue to contribute important increments. Based on evsales and CAAC statistics, we estimate that the total sales volume of the global new energy vehicle market in 2019 was 2.229 million; We expect to reach 3.48 million vehicles in 2020, with a year-on-year increase of 56.12%, of which 2.04 million vehicles are sold in overseas markets, with a year-on-year increase of 1.01 times. The positive development of new energy vehicles is expected to drive the growth of the demand for power battery diaphragms. We estimate that the demand for power battery diaphragms is expected to reach 2.747, 3.975 and 5.092 billion square meters from 2020 to 2022, with a year-on-year increase of 50.12%, 44.68% and 28.10%. (source: future think tank)

[market] power battery gradually warms up, and the demand for diaphragm increases

The domestic diaphragm market is gradually improving, the downstream power batteries are gradually warming up, and the small power market is growing, driving the increase in diaphragm demand. However, the battery manufacturers have strong bargaining power, and the diaphragm price is relatively stable. Last week, SMM wet base membrane (5 μ m) The price is 2.5-3.3 yuan / square meter, SMM wet base membrane (7 μ m) The price is 1.8-2.2 yuan / square meter, SMM wet base membrane (9 μ m) The price is 1.2-1.5 yuan / square meter, and the average price is flat compared with last week. SMM dry base film (16 μ m) The price is 0.9-1 yuan / square meter, and the average price is the same as last week. SMM wet coating base film (5 μ m 2 μ m) The price is 3-3.8 yuan / square meter, SMM wet coating base film (7 μ m 2 μ m) The price is 2.2-2.6 yuan / square meter, SMM wet coating base film (9 μ m 3 μ m) The price is 1.8-2.5 yuan / square meter, and the average price is the same as last week. (source: battery bairenhui battery network)

[think tank circle]The proportion of boehmite diaphragm coating materials has gradually increased

Wu Hui, general manager of the research department of ivy Economics Research Institute, said that with the gradual thinning of the diaphragm and the gradual improvement of the safety performance of the battery, the proportion of coated diaphragms will gradually increase. At present, the mainstream coating materials are still mainly high-purity alumina, the proportion of boehmite is gradually increasing, and the proportion of mixed coating of ceramics and PVDF is gradually increasing, while PVDF coated diaphragms are more used in upholstered batteries. Wu Hui said that although the diaphragm coating process itself is not difficult, the core coating materials and formulas have a certain technical threshold. With the increase of the proportion of coated diaphragms and the growth of diaphragm shipments in the future, the demand for coating materials will also grow rapidly in the future.