What Are the Classifications of New Energy Lithium Batteries Applied in the Industry

As the core carrier of modern energy storage, lithium batteries feature a complex and multi-dimensional technical classification system, which directly affects the performance and cost-effectiveness of applications ranging from consumer electronics to new energy vehicles and energy storage power stations. Based on three core dimensions-cathode materials, physical structures, and application scenarios-this paper systematically analyzes the classification logic and performance characteristics of lithium batteries, incorporating the latest technological advances and market application cases in 2025, and ultimately forms an in-depth analysis article of approximately 2,400 words.

The cathode material is the "heart" of a lithium battery, directly determining its energy density, safety threshold, and cost structure. Among the current mainstream technical routes, ternary lithium batteries use nickel-cobalt-manganese (NCM) or nickel-cobalt-aluminum (NCA) as cathodes. With a high energy density of 300–400 Wh/kg, they have become the benchmark for long driving ranges in new energy vehicles. The 21700 cylindrical batteries equipped in Tesla Model 3 adopt the NCA system, which can maintain over 80% of their capacity even at a low temperature of -20℃. However, their thermal stability shortcomings require a supporting complex thermal management system. CATL's Qilin Battery improves electrode interface stability through nano-riveting technology, raising the thermal runaway trigger temperature to over 200℃. Meanwhile, its high-voltage platform design increases the cell voltage to 4.35V, further tapping into the potential for higher energy density. Lithium iron phosphate (LFP) batteries build a safety moat with a thermal decomposition temperature of over 600℃. BYD's Blade Battery enhances volumetric energy density to 180 Wh/L through a flat design and achieves a cycle life of over 5,000 times, realizing dual optimization of cost and safety in A00-class models such as the Wuling Hongguang MINI EV.

Lithium cobalt oxide (LCO) batteries once dominated the 3C digital market. Their 3.7V high-voltage platform and dense crystal structure enable slim and lightweight mobile phone bodies, but the scarcity of cobalt resources leads to high costs-global cobalt reserves are only 7.1 million tons, with 60% concentrated in the Democratic Republic of the Congo. Geopolitical risks are driving the industry toward cobalt-free transformation. Lithium manganese oxide (LMO) batteries occupy a place in the power tool sector thanks to their excellent rate performance. Hitachi's MAX radial batteries achieve a continuous discharge capability of 30C through a 3D conductive network design, meeting the high-power demands of scenarios such as electric drills. Notably, there is a growing trend toward composite cathode technologies. For example, CATL's AB Battery hybrid-packages ternary and LFP cells, and leverages intelligent thermal management to "complement each other's strengths": ternary cells dominate discharge in low-temperature scenarios, while LFP cells take over in high-temperature conditions, ensuring both driving range and safety.

Physical structure design directly impacts space utilization and production efficiency. Cylindrical batteries have the highest degree of standardization-the 18650 model has a diameter of 18mm, a height of 65mm, and a single-cell capacity of approximately 3.5Ah. Tesla's 4680 large cylindrical battery increases the diameter to 46mm and height to 80mm, boosting single-cell capacity to 25Ah. It also adopts tabless technology to reduce internal resistance, supporting 4C fast charging. Prismatic batteries feature customized dimensions to fit device spaces. The Blade Battery equipped in BYD Han EV adopts a flat prismatic design with dimensions of 914×118×13.5mm (length×width×height). Through cell-to-pack (CTP) technology without modules, it increases volumetric grouping efficiency to 60%, a 20% improvement compared to traditional prismatic batteries. Pouch batteries achieve thinness and lightness through aluminum-plastic film packaging. The pouch batteries supplied by Samsung SDI for Apple iPhone 15 have a thickness of only 2.5mm and an energy density of 350 Wh/L. Meanwhile, their pressure relief design prevents swelling and explosion risks, enabling flexible bending in wearable devices.

Differentiated demands in application scenarios have given rise to a three-level classification system. The consumer-grade market pursues a balance between volumetric energy density and cost-pouch ternary batteries account for over 70% of the smartphone market. OPPO Find X8 achieves both 65W fast charging and an 8.5mm body thickness through a dual-cell design. The power-grade market focuses on high energy density and high safety. The 150kWh semi-solid-state battery equipped in NIO ET7 uses in-situ polymerized electrolytes, delivering an energy density of 360 Wh/kg and supporting a 1,000km driving range. It also extends the thermal runaway propagation time to 30 minutes through nano-scale separator coating. The energy storage-grade market emphasizes cycle life and low cost. Sungrow's home energy storage system adopts LFP batteries with a cycle life of over 10,000 times and a levelized cost of storage (LCOS) reduced to 0.3 CNY/kWh, enabling self-sufficiency in household electricity consumption when paired with photovoltaic systems.

Among niche classifications, solid-state lithium batteries represent the next-generation technology. By replacing liquid electrolytes with solid electrolytes, they completely eliminate the risks of leakage and combustion. Toyota plans to mass-produce solid-state batteries in 2027, which will achieve an energy density of over 500 Wh/kg and shorten charging time to 10 minutes. Primary lithium batteries, such as lithium-manganese batteries, continue to play a role in smart meters and smoke alarms due to their 3.0V high voltage and 10-year storage life, with annual shipments exceeding 1 billion units. In terms of electrolyte innovation, the new lithium salt LiFSI, with its high conductivity and thermal stability, replaces the traditional LiPF6 in 4680 batteries, expanding the operating temperature range to -20℃ to 60℃.

The technological evolution trend presents three main directions: first, high specific energy-breaking through the 400 Wh/kg energy density threshold through materials such as silicon-carbon anodes and lithium-rich manganese-based cathodes; second, intelligence-battery management systems (BMS) realizing millisecond-level fault early warning through AI algorithms, for instance, CATL's BMS 3.0 can predict battery health status within 30 days; third, greenization-recycling technologies such as hydrometallurgical regeneration of LFP batteries increasing lithium recovery rate to 95% and cobalt recovery rate to 98%, forming a closed loop of "design-production-recycling".

In terms of market structure, China accounts for 70% of global lithium battery production capacity. CATL has ranked first in the world in power battery installed capacity for five consecutive years, with a market share of 37% in 2024. Europe is promoting localized production through the Battery Regulation, and Northvolt's Swedish factory has achieved an 80% local supply chain. The U.S. Inflation Reduction Act (IRA) ties battery subsidies to localized production. Tesla's Texas Gigafactory has introduced a 4680 battery production line, aiming to reduce per-vehicle costs by 14%.

Challenges and opportunities coexist. Safety remains a key pain point for the industry-there were 12 new energy vehicle fire accidents worldwide in 2024, mostly caused by the propagation of cell thermal runaway. Solutions include passive safety designs such as aerogel thermal insulation and directional exhaust valves, as well as active early warning systems based on big data. In terms of cost, lithium price fluctuations directly affect the industrial chain. In 2025, lithium carbonate prices are maintained at 150,000–200,000 CNY/ton, a 60% drop from the 2022 peak, but cobalt and nickel prices are still affected by geopolitics.

In the next decade, lithium battery technology will be deeply integrated with materials science, artificial intelligence, and circular economy. The mass production of solid-state batteries will address the bottlenecks of safety and energy density; AI-driven BMS will realize the full life-cycle management of batteries; and mature recycling technologies will build a green industrial chain. From consumer electronics to interstellar travel, lithium batteries will continue to serve as the core carrier of the energy revolution, driving human society toward a sustainable future.