Li-ion batteries are widely used in many aspect, nowadays.
For more information, please visit SUNJ ENERGY.
Have you noticed that'There are many kinds of Li-ion batteries' shapes, for example, square and cylindrical.
How many kinds of shapes are there'
Do you know their differences?
Do you know why engineers design that?
Read on and make your own mind up.
According to different packaging forms, there are mainly three kinds of Li-ion batteries: Cylindrical lithium ion battery, Prismatic lithium ion battery, and Pouch lithium ion battery.
cylindrical rechargeable lithium ion battery
prismatic lithium battery
pouch lithium battery
Different package structures refer to different characteristics. Let's break them down one by one.
Content
1.What is Cylindrical Lithium Battery?
2.Advantages and Disadvantages of Cylindrical Lithium Battery
3.What is Prismatic Lithium Battery?
4.Advantages and Disadvantages of Prismatic Lithium Battery
5.What is Pouch Lithium Battery?
6.Advantages and Disadvantages of Pouch Lithium Battery
Q&A 1: Are pouch batteries better than cylindrical batteries?
Q&A 2: Do cylindrical batteries swell?
Q&A 3: Why battery shell is important? What's function?
Q&A 4: What is the advantage of aluminum shell?
Q&A 5: What is the difference between cylindrical and prismatic battery cells?
Q&A 6: Naming Rules for batteries
The structure of a typical cylindrical lithium battery : shell, cap, positive electrode, negative electrode, diaphragm, electrolyte, PTC element, washer, safety valve, etc.
Generally, the battery shell is the negative electrode of the battery, the cap is the positive electrode of the battery.
Different kinds of Li-ion batteries can be formed into cylindrical, for example, LiFePO4 battery, NMC battery, LCO battery, LTO battery, LMO battery and etc.
structure of cylindrical lithium battery
reasons of high market penetration rate
Cylindrical shells divided into two types: steel or alloy material.
Generally speaking, the main battery is cylindrical cylindrical lithium iron phosphate batteries which is based on steel shell.
The earliest cylindrical Li-ion battery was the Li-ion battery which was invented by SONY in .
There are many models of cylindrical lithium batteries,such as common ones: 'lithium ion cylindrical battery 3.7V mAh ', 'lithium ion battery ', 'lithium rechargeable battery ', ''lithium battery ',etc.
Cylindrical lithium batteries are more popular among lithium battery companies in Japan and South Korea, and there are also large-scale companies in China that produce cylindrical lithium batteries.
Application of cylindriacal lithium battery: Electrical vehicle, Laptop, digital camera, solar lamps, lawn lamps, backup energy, power tools, and toy models, pneumatic tools, portable energy transfer and etc.
1.Good Consistency: with mature technology and producing standard, manufacturers can produce productions in large quantity and high quality.
2.Safe: Withstand high voltageand generally sealed batteries, NO SWELLING
3.Goodheat dissipation effect' Large specific surface area of the cylinde
4.High capacity, such as 15Ah cylindrical lithium ion battery, 20Ah cylindrical lithium battery
5.High output voltage
6.Stable output voltagel
7.Stable electric chemical performance
8.High current discharge
9.Good charge and discharge cycle performance
10.Wide operating temperature range
11.Environmentally friendly
12.Low PACK cost
13.Replaceable battery suppliers
flexible design for cylindrical cell battery pack
Cylindrical battery array with liquid cooling tubes
(A simple lithium battery pack)
Lithium Battery Design Design Ebook Download(2M, 20 pages, PDF)
Structure: Laminated or wound top cover, housing, positive electrode plate, negative electrode plate, diaphragm, insulating parts, safety components, etc.
Although there are steel shell and aluminum shell battery, the aluminum shell one has generally become the mainstream with the market's pursuit.
Prismatic cells have many anodes, cathodes and separators which of them are rolled up and then pressed into a metallic or hard-plastic shells.
Layer stacking and jelly rolling are both assemble for prismatic electrodes. That is the reason why there are thousands optional types of prismatic cells.
Application of prismatic lithium battery: small electronic devices such as mobile phones.
structure of prismatic lithium battery
Prismatic battery array with a heat sink conduction matrix
(A simple lithium battery pack)
Structure: Liquid lithium-ion batteries with a layer of polymer shell. The package material is aluminum-plastic composite film which is the most critical and technically difficult material in pouch Li-ion batteries.
Packaging materials have three layers:
Outer barrier' outer protective layer composed of nylon BOPA or PET
Permeable layer' intermediate layer made of aluminum foil
Inner layer'Multifunctional high barrier layer
Application of Pouch lithium battery: Consumer, military, as well as automotive industries.
Mainly used in equipment which has equipment weight requirement or compact space. Pouch batteries are suitable for conditions where the working environment is relatively stable and there are no complex road conditions to ensure the structural stability and service life of lithium battery packs.
structure of pouch lithium battery
Pouch battery array with a heat sink
(A simple lithium battery pack)
These are all details about cylindrical, prismatic and pouch batteries.
Looking forward, with pouch cells' optimism , it will move to higher producing efficiency and better performance. Pouch and prismatic formats will be the most used, especially for automotive and energy storage use.
However, it does not means that cylindrical battery will disappear, it will also exist with less dominant stake in the battery market.
Yes. Pouch lithium battery is well kown for its LIGHTER weight, BETTER safety performance, LARGER lithium battery capacity and SMALLER internal resistance.
At present, if you have other requirement, you can consider pouch batteries. If you do not have weight, space and cost requirements, cylindrical is the optimal choice to save your money and time.
If you are looking for more details, kindly visit pouch cell vs cylindrical battery.
No, it rarely swell. Because its shell is made by steel or alloy material which is very hard, it can withstand high gas pressure and voltage. Thus cylindrical lithium battery will not swell. While pouch battery has possibility to swell.
The following are functions of battery shell
1.The lightweight space is large, because the density is 1/3 of steel'
2.Good thermal conductivity,5 times of steel's'
3.Absorbs twice as much energy per unit weight as steel'
4.Good extension performance'
5.Strong plasticity, good weld-ability, and good productivity'
6.Good casting performance, can be processed into different shapes'
7.Corrosion-resistant, easy to recycle and regenerate
shape cylindrical lithium cell pristimatic lithium cell pouch lithium cell Electrode Arrangement wound wound stacked Mechanical Strength very hard ++ hard + not hard - Heat Management not bad- good+ good+ Specific Energy high + high+ very high ++ Energy Density high + very high ++ high +
From the chart below, we can easily gain:
Lithium Battery Design Design Ebook Download(2M, 20 pages, PDF)
Some may confused about numbers mentioned above:, , , '
Let's have a look about these numbers.
All of them are names of cylindrical cells.According to name of cylindrical battery given by manufacturers, we can easily know its basic information.
How'
Naming Rule: Three letters+Five numbers+ normal capacity
Five Letters refer to main electrode materials of cell
The first letter: anode material
'I'' lithium ion
'L'' lithium or lithium alloy
The second letter: cathode electrode material
'C'' Cobalt electrode
'N'' Nickle electrode
'M'' Manganese electrode
'V'' Lead electrode
The third letter''R'' cylindrical cell
Five numbers refer to its outer dimensions
The first and second number: the diameter of cell(mm)
The third and fourth number :the height of battery (mm)
The last number '0': cylindrical battery
The normal capacity: usually use milliampere( mAh) as unit
Naming Rule: Three letters+ Six numbers+ normal capacity
Six numbers refer to its outer dimensions
The first two numbers: the thickness of cell(mm)
The third and fourth numbers :the width of battery (mm)
The last two numbers: the height of battery (mm)
Pay attention!!
ICP35/78/131 INP34/63/110
ICPt INP35t968
IMPt: a square secondary lithium-ion battery, the cathode material is Manganese, its thickness is about 0.7mm, the width is about 34mm and the height is about 48mm.
For example
ICP' a prismatic secondary lithium-ion battery, the cathode material is Cobalt, its thickness is about 10mm, the width is about 34mm, and the height is about 50mm.
INPO8/34/150 : a prismatic secondary lithium-ion battery, the cathode material is Nickle, its thickness is about 8mm, the width is about 34mm and the height is about 150mm.
Want More Details: Download our battery design ebook.Lithium Battery Design Design Ebook Download(2M, 20 pages, PDF)
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lithium-ion battery cell is a rechargeable battery that uses lithium ions as the primary charge carrier. These batteries are widely used in portable electronic devices, electric vehicles and grid storage systems.
There are several different types of Li-ion battery cells on the market, which may vary in size, capacity and performance characteristics. Some common types include: cylindrical cells, Prismatic cells, and pouch cells.
Cylindrical cells have small size, good cell consistency, higher energy density of single cells, more flexible group formation, mature production process and low cost.
The name of the cylindrical lithium battery consists of 3 letters and 5 digits.
The first letter: ' I ' indicates lithium ion with built-in, ' L ' indicates lithium metal or lithium alloy electrode.
The second letter: ' C ' denotes drill, ' N ' denotes nickel, ' M ' denotes manganese, and ' V ' denotes vanadium. (positive electrode material)
The third letter: ' R ' means rounded.
The first 2 numbers indicate the diameter, the last 3 numbers indicate the height. Unit: mm
For example: ICR is the diameter of 18mm, the height of 65mm, 0 indicates the round general cylindrical battery.
' 3.7V ' is the nominal voltage of 3.7V.
' 3C ' is the discharge rate when the battery is discharged, commonly known as the discharge size or speed per unit of time. Unit: mAh
For example: If the battery capacity used is discharged for 1h, it is called 1C discharge; if it is discharged for 5h, it is called 0.2C discharge.
(Some commonly used models)
This type of battery has smaller cell gap and tighter internal material, the battery is not easy to expand under the limit of high hardness, and the safety is higher.
At the same time, the shell is made of aluminum-magnesium alloy with lower density, lighter weight and higher strength to further strengthen the internal protection, and the corresponding production process is not complicated. As it can be customized according to demand, there are more models on the market.
(Some commonly used models)
lithium pouch cells battery is the best among the three routes, with flexible size, high energy density and light weight.
However, the mechanical strength is not high, the production process is also more complicated, the production cost is high, and the cost performance is average.
6 numbers indicate the thickness, width and height of the battery, respectively, in millimeters. When any one of the three dimensions is greater than or equal to 100mm, a slash should be added between the dimensions; If there is less than 1mm in the three dimensions, the letter t will be added in front of the dimension number, meaning 1/10mm.
' ICP means a square secondary lithium battery, the cathode material is drill, thickness:10mm, width: 34mm, height:50mm.
' ICPO8/34/150 means a square secondary lithium battery with a drill as the cathode material, whose thickness:8 mm, width:34 mm and height:150 mm.
' ICPt means a square secondary lithium battery, the cathode material is drill, its thickness:0.7mm, the width:34mm and the height:48mm.
(Some commonly used models)
In general, different batteries have their own advantages and disadvantages. Each battery has its own area of excellence that suits it. You can determine which battery you want to use according to your needs. Or contact SIXPACK for more useful suggestions.
At the same time, when choosing and identifying lithium battery products. Not only do you need to know the voltage and power of the power-using equipment. Working hours and other in-depth understanding, but also to understand the different characteristics and functions of different types and models of lithium batteries.
Cylindrical batteries are suitable for mass production and lower cost, with a variety of combinations, suitable for a wide range of electrical products.
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