Recently, the lithium slurry battery project undertaken by the Institute of Electrical Engineering, Chinese Academy of Sciences passed the acceptance of the Beijing Municipal Science and Technology Commission. The research and development of the first-generation pilot products of this project was successful, achieving a breakthrough from zero to one for lithium slurry batteries worldwide.
"Low cost, long life, high safety, and easy recycling are the comprehensive goals for the development of energy storage batteries. The existing lithium-ion batteries are generally 'petite and rich,' and are not suitable for large-scale energy storage scenarios. Can energy storage applications be used? Oriented to develop 'silly, big, stupid,' large-capacity power storage batteries? At the end of 2010, we began to explore the combination of lithium batteries and Other types of storage batteries, and researched lithium slurry batteries suitable for large-capacity energy storage. Year. "Chen Yongchuang said of the original intention of the project research and development.
Chen Yongchuang is the leader of the energy storage technology research group of the Institute of Electrical Engineering, Chinese Academy of Sciences, and the leader of the technical team of the lithium slurry battery project. It is reported that the technical name "Lithium Slurry Battery" was first officially proposed by the Chen Yongchuang technical team in the 2015 invention patent CN 201510164222.1. Up to now, the project has applied for 92 patents and been authorized 35, the number of related patents in the world First, the core technology patents were authorized by the United States in March this year, forming a technical route with independent intellectual property rights internationally.
Chen Yongchuang said that compared with traditional lithium batteries, lithium paste batteries have four major characteristics: First, the battery manufacturing cost is lower, and the ultra-thick paste electrode is 10-50 times the thickness of the common lithium ion battery coated bonding electrode. It is suitable for providing large-capacity power storage output; second, it can be regenerated and repaired. When the performance of the battery drops for a period of time, the internal interface of the battery is repaired by regeneration technology, and the vitality of the battery is renewed to reach a calendar life of more than 10 years; Safe and controllable, when a short-circuit failure occurs in the battery, the battery can be controlled and maintained through the safety system to ensure that the battery does not burn or explode; the fourth is to solve the problem of battery recycling. When the battery is scrapped, the slurry is easy to recycle The treatment can be supplemented by missing trace elements and used for new battery production after regeneration. It is estimated that the manufacturing cost of lithium paste batteries is about 1/3 lower than that of ordinary lithium-ion batteries. It is expected to break through the electricity cost of 0.4 yuan / kWh after large-scale production in the future.
Innovation is the process of constantly challenging and overcoming difficulties. In the initial principle verification stage of the lithium paste battery, Chen Yongchuang led the team to try a variety of material formulations and innovatively proposed a "collector internal resistance decoupling structure" that was completely different from the existing battery structure. Through relevant experiments, the technology was overcome in one fell swoop. Difficult to solve the problem of polarization of ultra-thick electrodes.
Chen Yongchuang further mentioned that lithium slurry batteries are divided into small energy storage application products and large energy storage application products. The former mainly aims to replace part of the lead-acid battery market, and the latter is mainly used in capacity-based energy storage scenarios. Lithium slurry batteries are an important technical direction in the field of capacity-based long-term energy storage. In the future, they will be widely used in low-speed electric vehicles, photovoltaic energy storage, base station energy storage, home energy storage, and peak-filling power storage scenarios.
"The next step is to focus on the research and development of process equipment and the industrial transformation of technological achievements, and to carry out the scale-up pilot work from 'one to ten'. At present, the team is developing a second-generation battery pilot product that is close to product application. It is planned to realize small-volume production of lithium paste battery MVP products next year and deliver them to target customers for trial. In the future, we will also be market-oriented, feedback and iteratively develop new energy storage battery products. "Chen Yongchuang said. (Reporter Fan Tongjie)
kaiping aida sanitary ware technology co.,ltd , https://www.kpaidafaucets-jm.com