It is understood that the LF560K energy storage battery released by EVE this time is also the lithium-ion battery dedicated to energy storage with the largest single cell capacity on the market.
Chen Xiang, general manager of Wuhan Yiwei Energy Storage Co., Ltd., introduced at the press conference that with the need for low-carbon transformation, the energy storage industry is developing rapidly, and is standing at the inflection point of the time when GWh rises to TWh. demand, energy storage batteries need to have high safety and high economy.
The LF560K battery launched by EVE this time adopts the ultra-large battery CTT (Cell to TWh) technology, that is, the battery cell technology for TWh-level energy storage scale, which can realize the cost reduction of both the cell and the system level. It is expected to open in the second quarter of 2024. Worldwide delivery.
According to Yuan Dingding, Chief Technology Officer of EVE Lithium Iron, at the press conference, in the application of system integration, the use of LF560K battery can reduce the number of cells by 50% compared to EVE's previous LF280K energy storage battery. Reduce the number of battery pack components by 47% and increase production efficiency by 30%. In addition, through the optimization of cluster-level size, the container power can be increased by 6.5%, which can adapt to industry standard integration solutions and reduce customer usage costs.
In response to the key technical problems of super large batteries, EVE adopts "stacking technology" to solve the problems of LF560K battery in electronic conductance current collecting design and manufacturability. On the one hand, the number of tabs of the laminated core package is doubled, which solves the problem of current collection of electronic conductance and reduces the direct current resistance (DCIR) of the product by 8%; The length is shortened by 100 times, and the total yield of cell production can be increased by 3%.
In addition, Yuan Dingding also introduced the construction of Yiwei lithium energy storage battery super factory at the press conference. At present, Yiwei Lithium Energy's energy storage battery super factories in Yunnan and Qinghai are under construction. The super factory has a single-line capacity of 10GWh, and the total capacity will reach 40GWh per year. Compared with the traditional battery factory, the single GWh of the super factory will reduce the investment by 38%, the single GWh energy consumption will be reduced by 20%, and the single GWh manpower will be reduced by 30%. According to reports, by 2025, Yiwei Lithium Energy will build a scale of 100GWh of energy storage batteries.
It is understood that EVE was established in 2001 and listed on the Shenzhen Growth Enterprise Market in 2009. Battery products and solutions cover power square ternary batteries, square lithium iron phosphate batteries, soft pack ternary batteries, large cylindrical batteries and energy storage battery systems. Products are used in electric ships, construction machinery, electric energy storage, communication energy storage, household energy storage and other markets.
On October 21, Chen Yongchong, head of the energy storage technology research group of the Institute of Electrical Engineering of the Chinese Academy of Sciences, introduced in an interview with the surging news reporter that EVE's energy storage battery product is among the similar organic electrolyte solution lithium-ion energy storage batteries on the domestic market. , the capacity of a single cell is the largest. Previously, the large-capacity lithium-ion energy storage batteries on the market mainly included BYD's 320Ah and 350Ah lithium-ion energy storage batteries.
The Paper reporter learned from industry insiders that the current mainstream lithium-ion energy storage batteries on the market have cell capacities ranging from 50-280Ah. A solid-state polymer lithium battery produced by Fujian Judian Company has a cell capacity of 500Ah.
According to Chen Yongchong, a lithium slurry energy storage battery developed by the Institute of Electrical Engineering of the Chinese Academy of Sciences has a cell capacity of 2000Ah, but the battery is still in the pilot stage and is expected to be mass-produced next year.
It is understood that the larger the capacity of the battery cell, the corresponding reduction in the number of cells and components used in system integration, thereby reducing the cost of the battery.
In Chen Yongchong's view, large-capacity batteries are the development trend of special batteries for energy storage. "On the premise of ensuring the safety of the energy storage battery, the larger the cell capacity, the better, but the premise is that the safety must be done well." Chen Yongchong said, "Because the larger the capacity, the heat dissipation of the cell, and the thermal runaway after the battery is short-circuited. The problems will be more prominent, and there must be innovative solutions to solve them.”