The production technology of lithium battery separators fills the domestic gap, with single products accounting for 13% of the national market share.
At present, the membrane material "little giant" in Fuyang, Jieshou Tianhong New Materials Co., Ltd., is tightly holding onto the "diamond" and "membrane" with full strength
9 microns, 8 microns! Every small step taken in the thickness of lithium battery separators is a new milestone in the development of membrane materials. "On November 21st, in the brand new workshop of Jieshou Tianhong New Materials Co., Ltd., the newly put into operation lithium battery separator production line is running steadily. Li Wangyang, the company's R&D backbone and deputy general manager, couldn't hide his excitement:" As long as the market needs it, the membranes we produce here can be even thinner
Li Wangyang's Confidence
Derived from Tianhong New Materials
Years of deep cultivation in the field of membrane materials
Tianhong New Materials initially started in the field of food packaging, focusing on food and pharmaceutical packaging films. Within a few years of its establishment, it became a supplier of product packaging films for well-known companies such as Wang Shouyi Thirteen Fragrances and Renhe Pharmaceutical, gradually expanding into the field of multifunctional films such as biodegradable films, heat shrinkable smoke films, and twisted (printed) films.
In 2010, electric vehicles became a "new trend", and the market demand for power batteries became increasingly strong. Tianhong New Materials turned its attention to the core component of lithium batteries - lithium battery separators. At that time, due to technological limitations, this product mainly relied on imports. But Tianhong New Materials did not stop there. Instead, it joined hands with universities and institutions such as Hefei University of Technology to make a big push into this field and successfully conquered the core technology of lithium battery separator production - dry single pull technology. While filling the domestic gap in this technology, it also broke the import dependence of this type of lithium battery separator product. In 2021, the key technology research project for the industrialization of high-performance lithium battery separators by Tianhong New Materials was awarded the first prize of the Provincial Science and Technology Progress Award.
In the laboratory of Tianhong New Materials, the "magic" of lithium battery separators is clearly visible
Under an electron microscope, countless nanoscale micropores are evenly arranged on a thin film that appears to be semi transparent plastic cloth. This structure allows lithium ions to pass smoothly even when isolated from the positive and negative electrodes of the battery.
As a key component with high technological barriers in lithium batteries, the separator can separate the positive and negative electrodes, prevent battery short circuits, and ensure the free passage of lithium ions. Its importance to lithium batteries is comparable to that of valves to the heart, "said Li Wangyang. At the same time, the thickness of the separator directly affects the capacity, cycling, safety and other performance of lithium batteries. To make the diaphragm thinner, a special production process is required. The performance indicators such as pore size and puncture strength of the diaphragm are also largely determined by it.
Dry single pull technology is precisely this process.
16 microns, 14 microns
12 microns, 9 microns, 8 microns
Grasp the "diamond" of dry single pull technology tightly
Tianhong New Materials
Continuously using thinner lithium battery separators
Take over the fields of new energy vehicles, new energy storage, etc
Porcelain is alive
Last year, the company established stable cooperative relationships with several leading enterprises in the new energy vehicle industry chain and was included in the first batch of advantageous and high growth enterprises in the new energy vehicle and intelligent connected vehicle industry in Anhui Province.
This year, Tianhong New Materials has put into operation four intelligent production lines for lithium battery separators. The annual production capacity of lithium battery separators has reached 400 million square meters, ranking among the top five in the domestic dry process single pull separator industry. The market share of dry process single pull lithium battery separators accounts for 13% of similar products in China. Since the beginning of this year, the enterprise's output value has exceeded 300 million yuan.
With the unique skills in the field of film materials
Tianhong New Materials has successfully entered the market
National Specialized, Refined, Unique and New "Little Giant" Enterprises
But the footsteps of enterprises competing for new tracks
Not slowing down
Not long ago, Tianhong New Materials teamed up with Academician Wang Qi from Sichuan University to establish an academician workstation, preparing to move towards the more advanced field of membrane materials. By the end of the year, four more intelligent production lines for lithium battery separators will also be put into operation. We also plan to invest another 1 billion yuan to build a second phase of 20 intelligent production lines for lithium battery separators. At that time, we will have 31 lithium battery separator production lines and become a leading enterprise in this field. "Li Wangyang said that by expanding production capacity, improving processes, and continuing to walk the path of" specialization, refinement, and innovation ", Tianhong New Materials will make new energy vehicles, new energy storage and other fields feel more of the" membrane "power of" Fuyang Manufacturing ".
Editor: Sichuan Jinzhongde Science and Technology Research Institute
Source: High functional film
