Development Trend for Quick Charging Technology of Lithium-ion Battery
|出版日期||內容資訊||英文 250 Pages
|LIB（鋰離子電池）快速充電技術的現狀與預測（2021） Development Trend for Quick Charging Technology of Lithium-ion Battery|
|出版日期: 2021年01月22日||內容資訊: 英文 250 Pages||
電動汽車（EV）的時代已真正開始。 Model S發佈了一款可存儲超過60kWh能量的電動汽車，自然已經擴展了對快速充電的需求。這是因為傳統的低速充電器必須花費很長時間才能充電約8到9個小時。自然，該行業已開始將重點放在電動汽車的快速充電上。
The Electric Vehicle (EV) Era has begun in earnest. Starting with the Model S, EVs that can store more than 60kWh of energy have been released, which has naturally expanded to the demand for fast charging. This is because the conventional slow charger has to spend a long time of around 8-9 hours for charging. Naturally, the industry started to focus on fast charging of EVs.
Unlike small electronic devices, including smartphones, EVs should secure a life of more than 10 years and at the same time, be charged at a high voltage of at least 220V. Also, safety must be secured. The technological difficulty of quick charging to send higher voltage and current naturally increases more.
In the modes to charge the electric vehicle, there are various modes: the direct charging mode to supply energy directly by connecting the plug to the electric vehicle, the battery exchange mode to replace the whole battery itself, the non-contact charging mode to charge the battery by delivering the electric power through electromagnetic induction, etc. Among them, the direct-charging mode, which is most common, is divided into 2 kinds, depending on the charging speed: the Quick Charging Mode which can charge relatively quickly by using direct current, and the Slow Charging Mode which charges slowly compared to the Quick Charge by using alternating current.
Currently, the technology in the electric vehicle battery industry is being developed to the extent of being capable of charging up to about 80% of the battery capacity within 20 to 30 minutes. It is faster than the slow charge mode which takes about 9 hours (based on 60kWh vehicles) for 100% full-charge, but still needs to be improved, compared to the lubrication time of a general vehicle having an internal-combustion engine.
In the case of the existing known quick charging technology for lithium-ion secondary batteries, it is accompanied by a loss of the energy density of the battery, and thus, there may be a limit to the direct application to industrialization. Therefore, in order to realize a quick-charging Li-ion battery without loss of energy density, understanding the related electrochemical reaction mechanisms and designing and developing new innovative materials based on them are essential.
During the quick charge, lithium-ion desorption must occur at a rapid rate within the cathode oxide crystal structure; for the performance parameters to be possessed as an anode material, a low discharge potential, a high unit weight, and specific capacity per volume are preferentially considered. In addition to graphite anodes which have been widely used in small lithium-ion batteries, next-generation anode materials aiming at high capacity, high safety, and high durability should be reviewed.
This report will review rapid charging technologies, battery materials, and cell technologies and forecast the development trends and commercialization of IT and rapid charging technologies for EVs, by country/company.
The strong points of this report are as follows:
And this report provides information on trends in rapid charging technology to date.