EVE Energy readies to launch mass production of 600 Ah+ battery storage cells

China’s EVE Energy is set to become the first battery cell manufacturer to mass-produce lithium iron phosphate (LFP) battery cells with more than 600 Ah capacity for stationary storage applications.

The cells are part of EVE Energy’s Mr. Flagship series of products and solutions for battery energy storage system applications. Mr. Big is a 628 Ah lithium iron phosphate (LFP) cell, which is more than double the industry standard 300Ah+ format. It is integrated into Mr. Giant, a 20-feet containerised system with up to 5 MWh energy storage capacity.

Mr. Big battery cells and Mr. Giant energy storage systems were officially released in January and scheduled for mass production in October and November, respectively. Now, EVE has confirmed that the large-capacity cell will enter mass production in December this year and roll off its production lines in Jingmen, China.

However, EVE’s Mr. Big cell is not the biggest one announced to date. For instance, Chinese manufacturer Hithium showcased earlier this year the industry’s highest-capacity LFP battery cell breaking the 1000 Ah barrier. The new product is the first LFP battery design for long-duration storage of four to eight hours, called “MIC 1130Ah”. The company expects to start mass producing the new cell type in Q3 or Q4 next year. 

Meanwhile, there is a number of companies, such as Envision and Cornex, which are moving to cells in the 700 Ah range. Furthermore, China’s BatteroTech, which supplies the likes of Sungrow, Fluence, Sermatec, and CRRC, launched a 688 Ah cell at the recent China International Energy Storage Expo (EESA EXPO). A company representative told ESS News at the show that “it usually takes a year to go into mass production” and that the company expects to start manufacturing its latest product at scale in Q4 2025. And the list goes on.

While mainstream energy storage companies started shipping 300 Ah+ products only in the second quarter of 2024, there are multiple reasons behind the move to even larger capacity cells. According to EVE Energy, “using prismatic LFP cells twice the size of the more common 314 Ah format means half the number of cells, half the number of connection points and half the number of overall system components.” “That results in significant performance and maintenance efficiency improvements,” and according to many manufacturers, lower cost – primarily due to increased energy density per square meter.

EVE’s latest Mr. Big cell is mady by virtue of the company’s fourth-generation high-speed stacking technology, achieving a roundtrip efficiency of 96%. It uses a thickened composite membrane and a separator technology for improved safety features. The separator has a greater thermal shutdown effect with coating particles that melt when a critical temperature is reached, thereby averting potential hazards, according to the company.

EVE Energy was ranked second in the world for energy storage shipments with 15 GWh delivered in the first half of 2024, by research firm Infolink, second only to CATL, which led the pack with orders from big customers like Tesla and Fluence. Some of EVE’s leading customers include Powin, Jinko Storage, ABS, Wartsila, and Huawei.