Recently, the first batch of new-generation 688Ah lifepo4 dedicated batteries jointly developed by CORNEX and CRRC Zhuzhou rolled off the assembly line smoothly. This cooperation not only demonstrates the deep accumulation of both parties in the field of lifepo4 technology, but also brings strong new impetus to the high-quality development of the industry and promotes the lifepo4 field to comprehensively enter a new stage of the "Double Six" era.

In the "double-six" era, the capacity of a single battery cell exceeds 600Ah and the system integrated energy exceeds 6MWh. The CORNEX 688Ah energy storage battery cell is a brand-new product specially developed to meet the market demand in the "double six" era. While the capacity is "upward", it has achieved multiple advantages such as energy density, intrinsic safety, energy efficiency, cost control, etc., creating a new level of battery cell performance in all dimensions.

High density

The 688Ah lifepo4 battery cell innovatively adopts the pole piece and boss design on the same side, which compresses the ineffective space to the extreme and releases large energy in a small space. It uses high-density, high-gram capacity, high-energy-efficiency lithium iron phosphate material, optimizes the lamination process, and effectively increases the energy density of the battery cell. The mass energy density is nearly 200Wh/kg, and the volume energy density exceeds 430Wh/L, an increase of 8% compared to the previous generation product.

High security

The 688Ah lifepo4 battery cell uses a high-safety, high-wetness electrolyte and a double-sided ceramic separator, which reduces side reactions and significantly improves thermal stability and wettability. The automated, digital, and intelligent production line has more than 50 CCD online monitoring items in a single line and more than 3,000 monitoring points to ensure process safety. It implements a testing process that is higher than national standards and has successfully passed stringent tests such as acupuncture and thermal runaway, protecting the bottom line of safety throughout the process.

From design, manufacturing process to testing and verification, the intrinsic safety of the battery cells is built layer by layer to ensure the safe and stable operation of the 688Ah lifepo4 dedicated battery cells at ultra-large capacity.

High rate of return

A single 688Ah lifepo4 battery cell has 2.2 kilowatt-hours of electricity, a cycle life of 10,000 times, a calendar life of more than 20 years, and an energy conversion efficiency of 95%. It can be flexibly used in industrial and commercial lifepo4, large storage and other fields. A 20-foot container equipped with this battery cell can achieve a jump in system energy from 5MWh to 6.9MWh, reducing the floor space of a unit of the same size by 20%, effectively reducing the owner's investment and life-cycle electricity costs, and significantly increasing the power station's return on investment. Provide strong support for large-scale, low-cost lifepo4 applications.

CORNEX actively embraces industrial changes, continuously breaks through the boundaries of battery cell performance, and is committed to providing customers with more extreme lifepo4 solutions. In 2024, CORNEX simultaneously developed a number of large-capacity batteries and achieved breakthroughs in multiple key technologies such as safety, cost, recycling, and energy efficiency. As a joint work of CORNEX and CRRC Zhuzhou Institute, the 688Ah lifepo4 battery cell has excellent performance, is safe and reliable, and will help accelerate the implementation of the 6.9MWh system and contribute more to global energy transformation and sustainable development.