Lithium polymer batteries are better than lithium batteries. The difference lies in different raw materials, different safety, different manufacturing processes and different capacities.
1. Raw materials
This is the main reason why lithium polymer batteries work differently from lithium batteries. Polymer batteries refer to the use of polymer materials in at least one of the three main components of the positive electrode, negative electrode or electrolyte.
In addition to the inorganic compounds of lithium batteries, the cathode materials of polymer batteries can also use conductive polymers. Lithium batteries use electrolytes (liquid or colloids)
2. >
Polymer batteries can be thin, in any area and in any shape, because the electrolyte can be solid or colloidal rather than liquid. Lithium batteries use electrolytes and require a solid casing. The housing serves as a secondary packaging to contain the electrolyte.
3. In terms of safety
Polymer batteries are mostly soft batteries, which use aluminum-plastic film as the outer casing when organic electrolytes are used inside, even if the film is aluminum . The liquid is very hot, it will not explode.
4. Cell Voltage
Since polymer batteries use polymer materials, multi-layer combinations can be made in cells to achieve high voltages, while the rated cell capacity of lithium batteries is 3, 6V. If you want to achieve high voltage in real applications, you need to connect multiple cells in series to form an ideal high voltage working platform.
5. Conductivity
The solid electrolyte of polymer batteries has low ionic conductivity. At present, some additives are mainly added to make it gel electrolyte to improve the conductivity. This only increases the ionic conductivity, unlike the conductivity of lithium batteries which maintains a stable value and is not affected by the quality of auxiliary materials.
6. Capacity
The capacity of polymer batteries has not been improved effectively and has been reduced compared to standard capacity lithium batteries.
7. Manufacturing process
The thinner the polymer battery, the better it can be produced, and the thicker the lithium battery, the better it can be produced. expand into more application areas.
8. Price
This is the key factor that determines the market capacity of both. Currently, the price of polymer batteries onthe market is generally higher than that of lithium batteries. , which affects the market capacity of the two, the ratio of the former to the latter is 1:9.
To summarize, the advantages of polymer batteries are:
Good safety performance.
The structure of lithium polymer batteries uses aluminum-plastic soft packaging, which is different from the metal casing of liquid batteries. When a safety hazard occurs, lithium-ion batteries explode easily, while polymer batteries will. only swell, at most it burns.
Small thickness can make it thinner
Ultra-thin, the thickness can be less than 1mm and it can be assembled into a credit card.
Lightweight, large capacity
The battery using polymer electrolyte does not need a metal shell as a protective outer packaging, so when the capacity is the same, it is 40% lighter than steel-shelled lithium. battery and lighter than aluminum shell. The battery is 20% lighter. When the volume is generally large, the polymer batteryThe capacity is larger, about 30% higher.
Shape can be customized
Polymer batteries can increase or decrease cell thickness according to actual needs. For example, the new laptop of a famous brand uses trapezoidal polymer batteries to be full. use of interior space.
What is the relationship between 18650 batteries and lithium polymer batteries?
Lithium polymer batteries arebetter than lithium batteries. The difference lies in different raw materials, different safety, different manufacturing processes and different capacities.
1. Raw materials
It isthe main reason why lithium polymer batteries work differently than lithium batteries. Polymer batteries refer to the use of polymer materials in at least one of the three main components of the positive electrode, negative electrode or electrolyte.
In addition to the inorganic compounds of lithium batteries, the cathode materials of polymer batteries can also use conductive polymers. Lithium batteries use electrolytes (liquid or colloids)
2. >
Polymer batteries can be thin, in any area and in any shape, because the electrolyte can be solid or colloidal rather than liquid. Lithium batteries use electrolytes and require a solid casing. The housing serves as a secondary packaging to contain the electrolyte.
3. In terms of safety
Polymer batteries are mostly batterieses flexible, which use an aluminum-plastic film as the outer casing when organic electrolytes are used inside, even if the film is aluminum. The liquid is very hot, it will not explode.
4. Cell Voltage
Since polymer batteries use polymer materials, multi-layer combinations can be made in cells to achieve high voltages, while the rated cell capacity of lithium batteries is 3, 6V. If you want to achieve high voltage in real applications, you need to connect multiple cells in series to form an ideal high voltage working platform.
5. Conductivity
The solid electrolyte of polymer batteries has low ionic conductivity. At present, some additives are mainly added to make it gel electrolyte to improve the conductivity. This only increases the ion conductivityique, unlike the conductivity of lithium batteries which maintains a stable value and is not affected by the quality of auxiliary materials.
6. Capacity
The capacity of polymer batteries has not been improved effectively and has been reduced compared to standard capacity lithium batteries.
7. Manufacturing process
The thinner the polymer battery, the better it can be produced, and the thicker the lithium battery, the better it can be produced. expand into more application areas.
8. Price
This is the key factor that determines the market capacity of both. At present, the price of polymer batteries on the market is generally higher than that of lithium batteries. , which affects the market capacity of the two, the ratio of the former to the latter is 1:9.
Notes
Storage requirements: In an environment with a temperature of 20 ± 5 ℃ and humidity does notnot exceeding 50%, corrosion of aluminum foil by air and water vapor should be avoided during transportation.
This product is divided into two types, A and B.The main characteristics are as follows: Model A has a black appearance, the conventional coating thickness is 4-8μm on both sides and its conductive performance is more outstanding; model B has a light gray appearance, the conventional coating thickness is 2-3μm on both sides; The sides and cladding area can perform fewer layers of welds and identify skip gaps with the cladding device.
Type B (gray) carbon coated aluminum sheet can be ultrasonic welded directly in the coating area. It is only suitable for soldering laminated battery tabs (up to 2-3 layers of pole pieces), but the power and time of ultrasound require fine tuning.
The diHeat dissipation of carbon layer is worse than that of aluminum foil, so the belt speed and baking temperature should be adjusted appropriately when coating.
This product can significantly improve the overall performance of lithium batteries and capacitors, but it cannot be used as the main factor to change some aspects of battery performance, such as the energy density of the battery. battery, performance at high and low temperature, high voltage, etc.
Reference for the above content: Baidu Encyclopedia - Battery Cell
Reference for the above content: Baidu Encyclopedia - Lithium Battery
Lithium polymer and iron phosphate battery What is the difference between lithium batteries? Which one is better
Hello, 18650 means it is a cylindrical battery with a diameter of 18mm and a higheur of 65.0 mm. Lithium polymer battery means that the positive electrode material of the battery is lithium cobalt oxide. , as it is said, any lithium cobalt oxide, lithium nickel cobalt manganate and lithium manganate can be used in 18650 battery. Of course, lithium cobalt oxide polymer material can also be made into cylindrical, square or flat shape, button shape. or other forms. Shape or something like that.
Lithium iron phosphate batteries are good.
1. Different Voltages:The rated voltage is 3.2V for lithium iron phosphate batteries and 3.7V for lithium polymer batteries.
2. Different Capacity: The capacity of lithium polymer battery is much larger with the same volume; for example, the 18650 lithium polymer battery has a capacity of 2200 mAh, tansay the lithium polymer battery has a capacity of 2200 mAh. the iron phosphate battery has a capacity of 1100 mAh, and the lithium iron phosphate battery can recover after being discharged to a voltage of 0V, although the over-discharge protection voltage is generally 2V while that the over-discharge protection voltage of lithium polymer batteries is 2.7; V, if it is lower, it will break.
3. The discharge current is different:The power lithium polymer battery has a maximum discharge current of 5 times, and the lithium iron phosphate battery can discharge a current of 10 times; the same goes for charging, so lithium iron phosphate battery can be charged faster.