手機banner

News

What is the difference between a polymer lithium battery and a ternary lithium ion battery?

What is the difference between a polymer lithium battery and a ternary lithium ion battery?

Release date:2018-11-29 author: clicks:

The polymerized battery is divided into a normal rate discharge battery and a high rate discharge battery (power battery/model battery). The separators and copper sheets used in high-rate polymer batteries are thicker than ordinary rate batteries.


Polymer batteries are generalized for soft-packed lithium batteries, and some of the ternary lithium-ion batteries are also polymerized. That is to say, the soft pack power lithium battery is also a polymer battery.


The full name of lithium battery is a polymer lithium (ion) battery


The power type lithium battery you mentioned is also a polymer lithium battery, because we generally have two main requirements when playing lithium battery products:


One is a capacity type battery, which is known for its large capacity. It is represented by Sanyo Dahongpao (18650 can do 1500MAH-3000MAH), etc., which are commonly used with small current discharge, but have large capacity requirements, such as mobile power, outdoor flashlight. Wait;


The other is the power battery, the power type is suitable for large current discharge, the discharge rate is generally above tens of C, realizing the instantaneous high current, mainly used in aircraft models, electric sports cars and other products, the player often chooses the brand is A123, impression Medium discharge rate 30C-70C,


Cattle!


Polymer batteries are a generalization of soft-packed lithium batteries, and some of the power lithium batteries are also polymerized batteries.


That is to say, the soft pack power lithium battery is also a polymer battery.


The polymerized battery is divided into a normal rate discharge battery and a high rate discharge battery (power battery/model battery).


The separators and copper sheets used in high-rate polymer batteries are thicker than ordinary rate batteries. . . . .


Polymer cells are also an integral part of lithium-ion batteries. The composition of the lithium ion secondary rechargeable battery is such that the cell + protection circuit board.


The rechargeable battery removal protection board is the battery. He is the power storage part of the rechargeable battery. The quality of the battery directly determines the quality of the rechargeable battery. [1]


The difference between a polymer battery and a conventional lithium ion battery lies in the production process. The lithium battery is entangled and has a soft volume. The polymer is superimposed and has a hard body shape. For the same volume of polymer and lithium batteries, the polymer has a larger capacity, about 30% higher. And it is safer and the risk of explosion is small.


The composition of the lithium ion secondary rechargeable battery is such that the cell + protection circuit board. The rechargeable battery removal protection board is the battery. He is the power storage part of the battery. The quality of the battery directly determines the quality of the rechargeable battery.


The mobile phone board removes the outer casing, and then removes the protective circuit board in the electric board to leave the lithium battery.


The battery core is divided into aluminum shell battery core, soft battery core (also known as "polymer battery core"), and cylindrical battery core. Generally, the ternary lithium-ion battery mobile phone battery adopts an aluminum-shell battery core, and the digital products such as Bluetooth adopt a soft-package battery core, and the battery of the lithium manganese oxide lithium-ion battery notebook computer adopts a series-parallel combination of cylindrical batteries.


Advantages and disadvantages of lithium batteries and polymer batteries


The advantage of the lithium battery is that the power of the discharge is greater than the maximum voltage of the polymer core at the same voltage. That is, the output performance of the lithium battery is good. The power can be used on some devices that require instantaneous high current to ensure the stability of the system. .


The disadvantage of lithium batteries is that their capacity is generally around 800MAH and the lithium battery is unstable in the short circuit and external harsh environment, and the metal shell on the surface is extremely lethal in the short circuit of lithium battery.


The advantage of the polymer battery is that the battery capacity is strong. The capacity of the polymer core of the same volume is 20% larger than the capacity of the lithium battery. The battery life is strong under the steady current output state and the surface is a flexible material. It will cause the battery to bulge and will not explode, it will only crack and be safe.


The disadvantage is that the peak current does not have a large lithium battery. In some cases where an instantaneous large current is required, it is somewhat stretched.


Lithium polymer battery (Li-polymer, also known as polymer lithium battery): Compared with the previous battery, it is a chemical battery with high energy, miniaturization and weight reduction.


Lithium polymer battery in shape, lithium polymer battery has ultra-thin characteristics, can be combined with the needs of some products, to produce lithium manganese oxide lithium ion batteries of different shapes and capacities. This type of battery has a theoretical minimum thickness of 0.5 mm.


The three elements of a typical battery: the positive electrode, the negative electrode, and the electrolyte. The lithium iron phosphate lithium ion battery refers to a battery system in which at least one or more of the three elements are made of a polymer material. In lithium polymer battery systems, most of the polymer materials are used on the positive electrode and the electrolyte. The positive electrode material uses a conductive polymer or an inorganic compound used in a general lithium ion battery. The negative electrode is usually a lithium metal or lithium carbon interlayer compound, and the electrolyte is a solid or colloidal polymer electrolyte or an organic electrolyte. Since there is no excess electrolyte in the lithium polymer, it is more reliable and stable. [1]


The lithium polymer battery uses a ruthenium alloy as a positive electrode, and uses a polymer conductive material, polyacetylene, polyaniline or polyp-phenol as a negative electrode, and an organic solvent as an electrolyte. The specific energy of lithium polyaniline battery can reach 350W.h/kg, but the specific power is only 50-60W/kg, the use temperature is -40-70 degrees, and the service life is about 330 times.


Compared to lithium-ion batteries, lithium polymer batteries have the following characteristics:


1. Relatively, the problem of improving the leakage of ternary lithium-ion batteries has not been completely improved.


2. Can be made into a thin battery: with a capacity of 3.6V250mAh, its thickness can be as thin as 0.5mm.


3. The battery can be designed in a variety of shapes.


4. A single high voltage: liquid electrolyte battery can only be connected in series with several batteries to obtain a high voltage, and the polymer battery can be made into a multi-layer combination in a single piece to achieve a high voltage because it has no liquid itself.


5. The amount of discharge is theoretically 10% higher than that of a lithium ion battery of the same size.


Lithium polymer battery (Li-polymer, also known as polymer lithium ion battery) has many advantages such as high specific energy, miniaturization, ultra-thinness, light weight and high safety. Based on such advantages, the lithium polymer battery can be made into a battery of any shape and capacity to meet the needs of various products; and it is packaged in aluminum plastic, and internal problems can be immediately expressed through the outer package, even if there is a safety hazard It will not explode, it will only bulge. In a polymer battery, the electrolyte functions as a separator and an electrolyte: on the one hand, the positive and negative materials are separated like a diaphragm, so that the battery does not self-discharge and short-circuit inside, and on the other hand, it is positive or negative like an electrolyte. Lithium ions are conducted between the poles. The polymer electrolyte not only has good electrical conductivity, but also has the characteristics of light weight, good elasticity and easy film formation which are peculiar to polymer materials, and also conforms to the development trend of light, safe, high-efficiency and environmental protection of chemical power sources. All lithium-ion batteries, whether in the past or in these years, include: polymer lithium-ion batteries, lithium iron phosphate batteries, etc., are very afraid of battery internal short circuit, battery external short circuit, overcharge.


Because lithium is very active in chemical activity, it is easy to burn. When the battery is discharged and charged, the inside of the battery will continue to heat up. The gas generated during the activation process will expand, the internal pressure of the battery will increase, and the pressure will reach a certain level. , it will rupture, causing liquid leakage, fire, and even explosion.


In order to alleviate the danger of lithium-ion batteries, technicians have added components that can inhibit the activity of lithium (such as cobalt, manganese, iron, etc.), but these do not fundamentally change the danger of lithium-ion batteries.


When a normal lithium-ion battery occurs during overcharging or short-circuiting, the inside of the battery may be heated, the cathode material is decomposed, and the anode and the electrolyte material are oxidized. This causes the gas to expand and the internal pressure of the battery to increase. When the pressure reaches a certain level. An explosion may occur after the degree. The polymer lithium ion battery uses a colloidal electrolyte, and does not generate a large amount of gas due to the boiling of the liquid, thereby eliminating the possibility of a violent explosion.


At present, most domestic polymer batteries are only soft-packed batteries, which use aluminum plastic film as the outer casing, but the electrolyte has not changed. The battery can also be thinned, its low-temperature discharge characteristics are better than that of polymer batteries, and the material energy density is basically the same as that of liquid lithium batteries and ordinary polymer batteries, but because of the use of aluminum plastic film, it is more than ordinary liquid lithium battery. light. In terms of safety, when the liquid is just boiling, the aluminum plastic film of the soft pack battery will naturally bulge or rupture, and will not explode.


It should be noted that the lithium iron phosphate lithium ion battery may still burn or expand and crack, and the safety aspect is not foolproof.


Therefore, everyone must pay attention to safety when using various lithium-ion batteries.

This article URL:http://www.putchoice.com/en/news/431.html

Recently Viewed:

摘花13外一14处tee出血-r级无码福利电影在线观看-麻豆饥渴少妇勾诱男教师-亚洲国产午夜精品理论片妓女