The global new energy vehicle market is expected to exceed 17 million units in 2024, with a penetration rate of up to 20%. Against the backdrop of the accelerating electrification of the global automotive industry, how to gain a competitive edge in battery technology has become a critical issue for automakers and battery manufacturers to address.

Image source: Internet

Solid-state batteries, with their advantages of high safety, high energy density, and long cycle life, are regarded as an important development direction for future battery technology. By replacing liquid electrolytes with solid-state ones, they fundamentally eliminate the risks of electrolyte leakage and thermal runaway. More disruptively, their energy density can reach 500-1000Wh/kg, which is 1.5-3 times that of traditional batteries. Vehicles equipped with solid-state batteries can easily achieve a range of over 1000 kilometers.

As a core component of battery systems, packaging materials undertake the triple functions of physical protection, electrical insulation, and environmental isolation, directly determining the safety, reliability, and lifespan of batteries. Against this backdrop, domestic companies have accelerated their technological breakthroughs. Recently, Zhonglun New Materials Co., Ltd. (referred to as 'Zhonglun New Materials') announced that its subsidiary Changsu Industry has successfully developed a BOPA (biaxially oriented polyamide film) specifically for solid-state battery packaging. Currently, there are no precedents for solid-state battery-specific BOPA globally. This breakthrough in a key material not only fills a technological gap in the industry but also marks another instance of China leading in core materials for new energy.

Source: zhong lun new material

Solid-state batteries impose strict requirements on packaging materials.

As a crucial component of solid-state batteries, encapsulation materials primarily serve functions such as physical protection, electrical insulation, and barrier against external substances. In solid-state battery systems, the transition of the electrolyte from liquid to solid has imposed far more stringent performance requirements on encapsulation materials compared to traditional lithium-ion batteries.

First, the material must have excellent mechanical properties to withstand the high-frequency vibrations and shocks during vehicle operation and the mechanical stresses under extreme conditions, in order to prevent the solid electrolyte from developing micro-cracks or interface delamination due to external forces.

Secondly, the encapsulation material must form an efficient chemical barrier that not only prevents the permeation of corrosive media such as oxygen and moisture but also withstands the long-term erosion of active substances in the solid electrolyte, preventing capacity degradation due to material degradation.

Therefore, the encapsulation materials for solid-state batteries need to have excellent mechanical properties, thermal stability, thermal conductivity, flame retardancy, environmental friendliness, and maintain structural integrity under extreme conditions. These requirements are both the core directions for breakthroughs in encapsulation material technology and the inevitable demands posed by the large-scale industrialization of solid-state batteries.

BOPA"Membrane cracking encapsulation material 'bottleneck' problem"

In response to these challenges, Zhonglun New Materials has provided answers through technological innovation.

Special functional BOPA plays the role of solid-state battery "armor," responsible for withstanding external forces such as impact, compression, and friction, protecting the battery's internal components like electrodes and electrolytes. Therefore, it demands extremely high standards for the material's flexibility, puncture resistance, and impact resistance.

It is understood that the BOPA specifically developed for solid-state batteries by Zhonglun New Materials took two years to research and develop. Targeting the changes in the solid electrolyte itself, operating environment, and usage requirements, breakthroughs were achieved in key performance areas such as material flexibility, puncture resistance, and impact resistance through process optimization and formula development. The mechanical properties are particularly outstanding and can meet the stringent requirements of solid-state batteries for packaging materials.

The recent launch of solid-state battery-specific BOPA by Zhonglun New Materials is a microcosm of China's series of key breakthroughs in the field of solid-state batteries. With the introduction of Zhonglun New Materials' solid-state battery-specific BOPA, the core materials will be localized, providing a stable material supply guarantee for the future large-scale industrialization of solid-state batteries, and helping the new energy industry chain to upgrade towards technological depth and high-end value chain.

Breakthrough in Encapsulation Material Technology Boosts Mass Production of Solid-State Batteries

The breakthrough in encapsulation material technology provides important foundations and guarantees for the mass production of solid-state batteries.

In fact, this is not the first time Zhonglun New Materials has laid out products in the new energy materials sector. Earlier, Changsu Industry, a subsidiary of Zhonglun New Materials, launched Changsu lithium battery membranes, which broke through key technical bottlenecks and have been widely used in lithium battery packaging, becoming a major supplier in this field in China. In 2024, Changsu Industry will invest 2.5 billion yuan to build a new energy materials project.

From a strategic perspective, Zhonglun New Materials' current deployment of BOPA for solid-state batteries follows the same logic as before, targeting "high-precision and cutting-edge" materials in the new energy sector that have large market potential, wide application areas, and high technical difficulty.

Significant technological advantages, exceptional R&D efficiency, irreplaceable core products, and the rapid ability to bring products to industrial-scale production have become Zhonglun New Materials' strongest moat. As the wave of solid-state battery industrialization approaches, this hidden champion holding the key to core materials may emerge as the most explosive value player in the new materials sector.

With companies like Zhonglun New Materials continuously making breakthroughs in the field of solid-state batteries, the large-scale industrialization of solid-state batteries may come more rapidly than we imagined. Recently, automakers such as BYD, GAC, and Changan have announced timelines for the installation of all-solid-state batteries in vehicles. The installation time for solid-state batteries in mainstream domestic and international automakers is concentrated between 2026 and 2030, with 2027 being a key milestone for the mass production of all-solid-state batteries.

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