What does cylindrical lithium battery mean

In fact, the cylindrical lithium battery can also be called 18650 lithium battery. As the originator of lithium battery, 18650 is a standard lithium battery model designed by Sony enterprises in Japan at that time to save costs. The 18650 rechargeable battery, which is often referred to by everyone, is actually named according to the size of the rechargeable battery. In 18650, 18 refers to the diameter of the lithium battery is 20mm, 65 refers to the length of 65mm, 0 refers to the length of 65mm. Generally, No. 5 battery is used more in household rechargeable batteries, Its model and specification is 14500, which means a cylindrical rechargeable battery with a diameter of 14mm and a length of 50mm; Simply put, 18650 actually refers to the specifications of rechargeable batteries. According to the types of rechargeable batteries, 18650 is generally divided into lithium batteries and lithium iron phosphate rechargeable batteries. The former one is widely used in the current market, and the latter one is also widely used.

It is found that ternary lithium battery has the advantages of high specific energy, good memory free ability and long service life.

Advantages of cylindrical lithium iron phosphate battery:

1、 Good single unity; Cylindrical lithium batteries have long had a series of internationally unified models and specifications. The manufacturing process is relatively complete and suitable for large-scale continuous production and processing.

2、 The engineering mechanical properties of a single barrel are excellent, the specific surface of the barrel is large, and the heat pipe radiator is excellent, which can obtain high bending strength;

3、 The key technologies are perfect and sound, and the cost is low. The plastic shell of the battery has high compression resistance, so it is not easy to have lattice, soft packed battery expansion and other conditions in the whole process of application.

4、 Single energy consumption is low, and the probability of several safety accidents is low. Cylindrical rechargeable batteries are generally closed batteries. There are no maintenance problems in the whole process of application, and safety accidents are very easy to occur in the whole process of application.

The rechargeable battery has no memory battery for charging, so the battery may not be charged and discharged before charging, and the application is more convenient; The internal resistance is small and the irreversible volume damage is small, which can greatly reduce the energy consumption of the rechargeable battery and increase the battery cycle times;

The test data shows that the ternary lithium battery has high safety factor and credibility, and is not easy to cause explosion and air pollution. The test data information shows that the positive and negative stages of the ternary lithium battery are separated, so that the probability of common faults of short-circuit faults is reduced to the best in most cases. The lithium battery protection board of the polymer cell can repair the ternary lithium battery, on the one hand, it can avoid the overcharging of the rechargeable battery or the damage of switching on and off the power supply.

Disadvantages of cylindrical lithium iron phosphate battery:

1、 Cylindrical lithium battery welding the manufacturing process of welding multipole lugs is limited, so the multiple characteristics are slightly weak, and the multiple examination results are not very prominent.

Second, the analytical chemistry characteristics at the edge of the cylindrical rechargeable battery are weak, and the reduction of battery performance is relatively obvious after long-term operation.

3. the compatibility with general rechargeable batteries is weak. Under normal conditions, 3 general rechargeable batteries  can be used to replace them with lithium batteries.