lithium battery 18650.What is 18650 battery cell?

It refers to the appearance design specifications of lithium battery cells. The Japanese SONY company originally established the lithium battery cell specifications and specifications to save costs. In the 18650 core, the data 18650 represent the appearance size: 18 means the diameter is 18mm, 65 means the length is 65mm, and 0 means the cylindrical battery core. General 18650 batteries are divided into lithium-ion battery cells, lithium iron phosphate and nickel metal hydride batteries.

Features of 18650 battery cells:

1. It has large capacity.

Under normal circumstances, the capacity of 18650 lithium battery is generally between 1800mAh and 2600mAh, while the capacity of ordinary lithium battery is only about 800MAh. If these lithium batteries are combined to form 18650 lithium battery, then 18650 lithium battery can easily increase the capacity to 5000Mah. .

2. It has a long lifespan

The 18650 lithium battery has a long service life. When used normally, the cycle life can reach more than 500 times, which is more than twice that of ordinary lithium batteries. The positive electrode material of the battery adopts the 18650 lithium battery of lithium iron phosphate battery, which can be used normally. The hourly circulation frequency reaches about 2000 times.

3. High safety factor;

High safety, non-toxic, zero-pollution lithium battery core certified by RoHS; various safety factors are achieved in one go, with a cycle frequency of more than 500 times; good heat resistance, and the charge and discharge efficiency reaches 100% at 65 degrees. In order to better prevent short-circuit failure of the lithium battery cell, the positive and negative stages of the 18650 lithium battery cell are separated. Therefore, the probability of short-circuit fault conditions is minimized. A lithium battery protection board can be added to prevent overcharging and overcharging and discharging the cells, and can also extend the service life of the lithium cells.


4. It is high voltage.

The working voltage of 18650 lithium battery cells is generally much higher than that of nickel-cadmium and nickel-metal hydride lithium batteries.

5. No memory.

6. The internal resistance is small;

Because the internal resistance of the 18650 lithium battery is not large, the internal resistance of the output power multiple type 18650 bipolar ear can be less than 25mΩ.

7. It is widely used in assembly.

It can operate lithium battery packs with different working voltages and different capacities in series, parallel, and parallel.

8. Wide range of use

Due to its fixed size, the 18650 is small in size, light in weight and large in volume. Become the first choice for many power-consuming equipment.

The production process and regulations of 18650 battery cells.

18650 lithium battery is still a devotee of electronic products in the notebook era. With the popularization of smart phones, tablets and other smart products, mobile chargers have become indispensable equipment for people's transportation. 18650 has also come from behind and is well-known to everyone. What is the reason for the seemingly simple 18650 lithium battery?

At this stage, in the data industry, lithium batteries have the largest utilization rate. Its most prominent advantage is its high specific energy, which is especially suitable for electronic products that are small and easy to use. Compared with batteries in the past, lithium batteries can be recycled and reused, which has environmental protection advantages. Both the positive and negative electrode materials of the battery can absorb lithium-ion batteries and release lithium-ion batteries. However, the organic chemical potential of lithium-ion batteries in the positive and negative stages is different. The chemical potential of the lithium-ion battery in the negative stage is higher, and the chemical potential of the lithium-ion battery in the positive stage is lower. When the negative stage is charged and discharged, the lithium-ion battery stored in the negative stage will be released and absorbed by the positive stage. Because the organic chemical potential of lithium-ion batteries is higher in the negative stage than in the positive stage, these potential differences are released into electromagnetic energy. The filling process is the opposite of the above process, that is, the lithium-ion battery in the positive stage is released to the negative stage. Because lithium-ion batteries move back and forth between positive and negative, lithium-ion batteries are also called chair rechargeable batteries.


Today's most common lithium battery packaging method is 18650. Whether it is the most popular ternary material, my country's first lithium iron phosphate battery, or lithium titanate that has not been popularized, they all have this specification. Cylindrical cylindrical packaging method is used, with a diameter of 20mm and a length of 65mm. It is widely used in mobile power supplies, pure electric vehicles, notebooks, bright flashlights and other industries. The advantage of this type of packaging is that the specifications and models are unified, which is conducive to automation and industrial production. , has the characteristics of high impact toughness, strong impact resistance, and high product qualification rate; in addition, Prismatic square hard package is more common in mobile phones and tablets. The most direct advantages of this type of package are lightness, small size, and Convenient to carry.