9V rechargeable battery

　　What does cylindrical 9V rechargeable battery refer to?

　　In fact, cylindrical lithium batteries can also be called 18650 lithium batteries. As the origin of lithium batteries, 18650 is a standard 9V rechargeable battery model designed by the Japanese company Sony at that time to save costs. The 18650 battery that everyone often talks about is actually based on the size of the battery. In the name, in 18650, 18 refers to the diameter of the 9V rechargeable battery, which is 20mm, 65 refers to the length of 65mm, and 0 refers to the length of 65mm. AA batteries are generally used more in home rechargeable batteries. Its model number The specification is 14500, which translated from Chinese means a cylindrical battery with a diameter of 14mm and a length of 50mm. Simply put, 18650 actually refers to the specification of the battery. According to the type of battery, 18650 is generally divided into lithium batteries. And lithium iron phosphate rechargeable batteries, the former one is more commonly used on the market, and the latter one is also more widely used.

　　Research has found that ternary lithium batteries have the advantages of high specific energy, good memorylessness, and long life.

　　Advantages of cylindrical lithium iron phosphate batteries:

　　1. The individual uniformity is good; cylindrical lithium batteries have already had a series of internationally unified standard models and models, and the manufacturing process is relatively complete and sound, suitable for large-scale continuous production and processing.

　　2. The single piece itself has excellent engineering mechanical properties, the barrel has a large specific surface, the heat pipe radiator is excellent, and it can obtain high bending strength;

　　3. The key technologies are perfect and sound and cost-effective. The plastic casing of the battery has high pressure resistance and is not prone to lattice and expansion of soft-pack batteries during use.

　　4. A single energy consumption is low, and the probability of multiple safety accidents is low. Cylindrical rechargeable batteries are generally sealed batteries, which have no maintenance problems during use and are prone to accidents during use.

　　Rechargeable batteries have no memory for battery charging, and the battery does not necessarily have to be charged or discharged before charging, making it more convenient to use; the internal resistance is small and the irreversible volume damage is small, which can greatly reduce the energy consumption of the rechargeable battery itself and increase the number of battery cycles;

　　Test data shows that ternary lithium batteries have high safety and reliability, and will not cause explosions and air pollution. The test data shows that the positive and negative stages of the ternary 9V rechargeable battery are separated, which reduces the probability of short circuit failure to the best in most cases. The battery protection board of the polymer cell can repair the ternary 9V rechargeable battery. On the one hand, This prevents overcharging of rechargeable batteries or damage to switching power supplies.

　　Disadvantages of cylindrical lithium iron phosphate batteries:

　　1. The production process of cylindrical 9V rechargeable battery welding multi-pole tabs is limited, so the multiple performance is slightly weaker and the multiple test results are not outstanding.

　　Second, the analytical chemical characteristics at the edge of the cylindrical rechargeable battery are weak, and long-term operation has a relatively obvious reduction in battery performance.

　　3. The compatibility with ordinary rechargeable batteries is weak, because under normal circumstances, it can be replaced with lithium batteries using 3 ordinary rechargeable batteries ().

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