According to Baidu Wenku's query, the model of the soft battery can generally be determined by looking at the signs on the outside of the battery. The specific method is as follows:
1. Check the four-digit battery code. This code can usually identify the battery size, voltage, capacity and other information. Taking 5040 as an example, 50 means the battery width is 50mm, and 40 means the battery height is 40mm, that is, the overall battery size is 5040 × × mm.
2. Find the battery model. The inside of a soft-pack lithium battery is made up of individual cells. By identifying the cell model in the battery, the specifications, capacity and other parameters of the battery can be determined. There are three common models of soft pack lithium battery cells: 18650, 14500 and 26650. Taking the18650 as an example, its diameter is 18mm and its length is 65mm, so it is called 18650 battery cell.
3. Identify the battery model from the manufacturer. You can determine the battery manufacturer by looking at the markings on the outside of the battery, and infer the battery's specifications and model. Common manufacturers of soft lithium batteries include CATL, BYD, etc.
Lithium battery marking minimum size in 2021
18650 is the size brand model, 18 is the diameter of 18mm, and 650 is the height of 65 .0mm.
18650 is the creator of lithium-ion batteries - a standard lithium-ion battery model defined by the Japanese company SONY in order to reduce costs. 18 means the diameter is 18mm and 65 means the length is 65mm. .0 represents a cylindrical battery.
Common 18650 batteries are divided into lithium-ion batteries and batries lithium iron phosphate. The rated voltage of lithium ion battery is 3.7V, the charging cutoff voltage is 4.2V, the rated voltage of lithium iron phosphate battery is 3.2V, the cutoff voltage charging is 3.6V, capacity is generally 1200mAh. 3350 mAh, common capacity is 2200 mAh-2600 mAh.
Detailed information
Charging and discharging principle of lithium-ion battery
The working principle of lithium battery -ion refers to its principle of charge and discharge. When the battery is charged, lithium ions are generated on the positive electrode of the battery and the generated lithium ions move to the negative electrode via the electrolyte. The carbon used as a negative electrode has a layered structure with numerous micropores. The lithium ions that reach the negative electrode are integrated into the micropores of the carbon layer. The more there isof lithium ions, the higher the charging capacity.
Similarly, when the battery is discharged (that is, the process when we use the battery), the lithium ions embedded in the carbon layer of the negative electrode are released and return towards the positive electrode. The more lithium ions that return to the positive electrode, the higher the discharge capacity. What we usually call battery capacity refers to the discharge capacity.
It is not difficult to see that during the charging and discharging process of lithium-ion batteries, lithium ions are in a state of movement from the positive electrode → the negative electrode → the positive electrode. If we dissociate the lithiumThe sub-battery is clearly compared to a rocking chair. The two ends of the rocking chair are the battery poles, and the lithium ions are like excellent athletes, running back and forth at bothends of the rocking chair. So, experts have given the lithium-ion battery a nice name: rocking chair battery.
Reference materials:
100x70mm
Use the new lithium battery handling brand to enable this. The mark is a square of 100 x 100 mm, and the minimum mark size is 100 x 70 mm. This mark size is consistent with that of other labels.