Review the "cell", "module", "pack"...
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Review the "cell", "module", "pack" of the battery, the other of the batteries you want to know now (9) (page 1/3)
「単1」「単2」の単は何を意味している？［クリックで拡大］
Suddenly, it's a problem.When representing the size of the battery, the name "AA" or "AA" is used. What does this "single" mean?
The correct answer is "unit".[Click to display the answer]
→ Serialization "This is the battery you want to know now" back number
The name "Single" is used as a word of "Unit Cell" (single battery) in English, and is a single or single battery that functions as a battery.In the case of lithium -ion batteries, batteries in the minimum configuration unit are often called "cells" or "single cells", and are roughly divided into "cylindrical cells", "square cells", and "laminated cells".
The cylindrical cell is a round cylindrical battery, as the name suggests.The battery, which is a familiarity, is a cylindrical type, and I think it is the most familiar shape for batteries.A roll -shaped structure (rolling body) that is rolled up with a positive electrode / negative pole / separator in a cylindrical metal housing is filled with a roll -shaped structure (rolling body).
In the case of lithium -ion batteries, the mainstream is one size larger than the battery.Typical ones are called "18650" (outer diameter about 18mm, length about 65 mm), and are also used in notebook PCs, mobile batteries, power tools, and some electric vehicles (EVs).
円筒型のリチウムイオン電池のサイズの比較［クリックで拡大］The cylindrical type is more productive than cells with other structures and can be mass -produced relatively inexpensive.On the other hand, if you try to install a large number of cells because of the shape of a cylinder, a gap will occur, and the space efficiency tends to be worse.In addition, it is necessary to increase the number of winding and increase the diameter of the cylinder in order to increase the battery capacity, so if it is too large, the center of the cell will tend to stay heat.
Tesla announced the large -diameter cylindrical cell "4680" (outer diameter of about 46 mm, a length of about 80 mm) at the battery development progress report "Battery Day" held in September 2020.The aim is to increase the capacity while overcoming issues associated with the large diameter, and is currently under development with the cooperation of battery manufacturers.
テスラが発表した大径円筒型セル［クリックで拡大］ 出所：テスラ円筒型以外にも、角型やパウチ型1|2|3次のページへ
