Lithium polymer batteriesare 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 shapee, 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, 6 V. If you want to achieve high voltage in real applications, you need to connect several cells in series to form a t platformideal high voltage work.
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, thePrice 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.
Remarks
Storage requirements: In an environment with a temperature of 20 ± 5 ℃ and humidity not exceeding 50%, corrosion of the aluminum foil by the Air and water vapor should be avoided during transportation.
This product is divided into two types, A and B. The main characteristics of each are: the appearance of type A is black, the conventional coating thickness is 4-8μm on both sides and the conductive performance is more remarkable; the appearance of type B is light gray, and the conventional coating thickness is 2-3μm on both sides. Fewer welding layers can be done in the cladding area and the cladding machine can identify skip gaps.
Reco aluminum foilType B carbon cover (gray) can be ultrasonically welded directly into the coating area and is only suitable for roll batteries. Solder the pole tabs (up to 2-3 layers of pole pieces), but the power and duration of ultrasound must be refined.
The heat 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 contenttop: Baidu Encyclopedia - Lithium Battery
China Electric Vehicle Industry The main lithium batteries used in vehicle batteries are of three types: iron-lithium, manganese-lithium and ternary.
1 Lithium Manganese
Advantages: cheap price; good low temperature performance, discharge efficiency over 90% at minus 20 degrees;
Disadvantages: poor performance at high temperatures; low lifespan (generally normal lifespan is about 300-400 times the low specific capacity in grams (112); starts quickly), has a great impact on this type of battery)
2 Ternary
Advantages: The price is the most expensive of the three high-capacity materials (150. can save; volume); good service life (600-700 times); good discharge rate.
Disadvantages: Safety performance is the worst of the three (especially those with steel hulls); at o'clockCurrently, the Chinese battery industry is not yet mature enough to master this material and does not use it much. ?
3 Lithium iron?
Advantages: average price; medium capacity (130); high lifespan (about 1500 times); good high temperature performance
;Disadvantages: Price is not cheap; low temperature performance is not good; its superior performance can only be fully reflected in electric vehicles (can be fully charged in 6 minutes and can be discharged 20 times)
Detailed information:
Identification method:
1 Compare the battery capacity. The general nickel-cadmium battery is 500 mAh or 600 mAh, and the nickel-hydrogen battery is only 800-900 mAh; and the capacity of lithium-ion mobile phone batteries is generally between 1300-1400 mAh, so theHow long the lithium battery lasts after being used. fully charged is about 1.5 times that of nickel-hydrogen battery, or about 3.0 times that of nickel-cadmium batteries.
If you find that the operating time of the lithium-ion cell phone battery you purchased is not as long as advertised or specified in the manual, it may be counterfeit.
2 Look at the plastic surface and the plastic material. The original battery has a uniform wear-resistant surface and is made of PC material, which is not fragile. Counterfeit batteries do not have a wear-resistant surface or are too rough and are made from recycled materials that are prone to brittleness.
3 Measure the battery pack charging voltage. If a nickel-cadmium or nickel-hydrogen battery pack is used to counterfeit a lithium-ion phone battery packne portable, it must be composed of 5 single cells. The charging voltage of the battery generally does not exceed 1.55 V, and the total voltage of the battery pack does not exceed 7.75 V. When the total charging voltage of the battery pack is less than 8.0 V, it may be nickel-cadmium or nickel. hydrogen battery.
4 For original batteries, the color and texture of the battery surface should be clear, uniform, clean, without obvious scratches or damage; the battery brand should be printed with the model, type, rated capacity of the battery. standard voltage, positive and negative Extreme Logo, manufacturer name.
It must be smooth and unobstructed, have a suitable seal, fit the hand well and have reliable locking; the material must not have obvious scratches or black or green spots. If the battery of the mobile phone we buy does not conform to the above phenomenonus, we can initially conclude that it is a fake.
5 Many mobile phone manufacturers have also made efforts to improve their know-how and make counterfeiting of mobile phones and accessories more difficult from their own perspective, thereby further curbing the proliferation parallel and counterfeit imports. Generally, ordinary mobile phone products and their accessories should have a consistent appearance.
So when we install the battery of the cell phone we bought, should we carefully compare the body and the bottom case of the battery? If the color matches, it is an original battery. Otherwise, the battery itself is dull and dull, and it may be a fake battery.
6 Observe load anomalies. Generally, genuine cell phone batteries must have an overcurrent protector insidelaugher, which automatically breaks the circuit when an external short circuit causes excessive current to avoid burning or damaging the phone. Lithium-ion batteries also have an overcurrent protection circuit, which can be; used when non-standard electrical appliances are used.
When the power current is too large, the power will be automatically cut off, resulting in charging failure. When the battery is normal, it can automatically return to the conductive state. If during the charging process we find that the battery seriously overheats, smokes or even explodes, it means that the battery must be fake.
Reference documents:
Baidu Encyclopedia - lithium battery