What is the difference between power lithium battery and ordinary lithium battery? Investigation and analysis found that the main difference is in battery material selection and discharge rate application. Different lithium battery cathode materials have different applications, and if discharge If the magnification is different, it will be easier to subdivide some application scenarios. Only by understanding the difference between these power lithium batteries and ordinary lithium batteries can they be better used for battery selection and program design.

　　Which of the 18650 lithium battery or polymer lithium battery has a long life?

　　The comprehensive performance test and comparative analysis of polymer lithium battery and 18650 lithium battery show that under the same test conditions, the service life of polymer lithium battery is generally longer than that of 18650 lithium battery.

　　The 18650 lithium battery is a cylindrical lithium ion battery, which is wrapped in a metal shell, and the physical protection of the shell is relatively safe. The polymer battery is packaged with aluminum-plastic film, and the exterior is relatively fragile and easy to scratch, pits, and broken skin. If the polymer battery is accidentally dropped on the ground, the battery anode ear is easy to break.

　　If both polymer lithium battery and 18650 battery use the same ternary material, polymer and 18650 battery storage conditions, polymer and battery charging and discharging conditions, 18650, 18650 and conditions use polymer batteries, 18650 and polymer The cycle conditions are the same, and the similar standard voltage standard structure and the same working environment are actually basically exhausted in 18650, and the polymer battery is durable.

　　The durability of the 18650 lithium battery or the polymer lithium battery mainly depends on the application scenario. If a Bluetooth headset is durable even if the 18650 battery is durable, the size of the box is not limited. It is recommended to use 18650, which is relatively durable.

　　Which is more expensive, 18650 lithium battery or polymer lithium battery?

　　1. The price of polymer and 18650 is calculated by 5000mAh battery for the expensive mobile power. 18650 needs at least two 2600 in parallel to reach 5000mAh, while the polymer can reach 5000mAh and can be changed within the size range. Let it be the shape you want; but for the 18650, only Panasonic Sanyo monomer can reach the maximum 3200MAH, and you can buy a polymer battery of 5000MAH.

　　2. Polymers at the same price are much more expensive. For example, domestic: 5000MAH polymer price is 35 yuan, 18650 or even two parallel prices are 27 yuan, but 18650 is more risky and easy to explode than polymer batteries, I recommend choosing Polymer battery, safety first.

　　Which one is safe, 18650 or polymer battery?

　　1. The safety of 18650 and polymer structure design must first understand the battery. If there is no problem with the structure design of the 18650 lithium battery and the lithium polymer battery, then the reason for the charger must be found, and the charging current setting specification requirements for the 18650 and polymer battery are normally seen. The book, a rechargeable battery safety problem is easy.

　　2. 18650 and polymer also look at the safety of consumers. Correct use of lithium batteries to ensure the safety of the battery. Of course, consumers are also obliged to use the battery correctly. Safety issues are related to 18650 and polymer, but this is not absolute. Apple The lithium battery failure problem of mobile phone lithium battery has also caused the equivalent safety problem of the global brand Samsung mobile phone lithium battery, resulting in the company's market value of N billion.

　　In contrast, improper use of polymer batteries is likely to cause the drum to burn, while improper use of lithium batteries is prone to explosions, which indicates that improper use of batteries may have potential safety hazards.

　　Polymer and 18650 are durable

　　Which is better, 18650 lithium battery or polymer lithium battery?

　　Whether the 18650 lithium battery is good or the polymer battery is really hard to draw conclusions. However, if used improperly, no matter how good the battery is, it can easily break. However, the structure of polymer batteries is more complicated. In addition to considering the safety of normal electrical performance, it is also necessary to consider factors such as the appearance of the package assembly and the easy break of the positive electrode ear during the packaging process.

　　From a consumer's point of view, the advantages of 18650 and polymer may be more beneficial to polymer batteries, but the burning probability of 18650 batteries is lower than that of 18650 batteries, and the risk of burning and explosion is caused by operating errors of 18650 batteries. Therefore, when comparing the advantages of 18650 and polymers, sometimes more people choose polymers.

　　After the lithium ion battery pole pieces are coated with slurry, dried and rolled, a three-layer composite structure of current collector and coating on both sides is formed. Then according to the battery design structure and specifications, we need to cut the pole piece again. Generally, for wound batteries, the pole pieces are divided into strips according to the design width; for laminated batteries, the pole pieces are cut into pieces accordingly. At present, the lithium battery pole piece cutting process mainly adopts the following three types: (1) disc shear slitting, (2) die punching, (3) laser cutting.