4.2V is the highest limit voltage for battery charging.
The charging voltage of 18650 lithium battery is 3.7V, the charging cutoff voltage is 4.2V, and the discharge cutoff voltage is 3.0V. Therefore, when the battery's open circuit voltage is lower than 3.6V, it should be able to charge. It is best to use 4.2V constant voltage charging mode.
High safety performance 18650 lithium battery has high safety performance, does not explode and burn not ; non-toxic, non-polluting and has passed RoHS brand certification are integrated in one go, the number; cycles is more than 500 times; and it has good high temperature resistance, the discharge efficiency reaches 100% under 65 degree conditions. To prevent battery short circuit, the positive and negative electrodes of the 18650 lithium battery are sseparated.
Detailed InformationWhat should be noted when using lithium batteries is that the battery enters a dormant state after being left for a period of time. At this point, the capacity is lower than the normal value and usage time. is also shortened. However, lithium batteries are easy to activate. After 3-5 normal charge and discharge cycles, the battery can be activated and restored to its normal capacity.
Due to the characteristics of the lithium battery itself, it has almost no memory effect. Therefore, the user's new mobile phone lithium battery does not require special methods and equipment during the activation process. Not only is this true in theory, but from my own practice, the "natural activation" method of loading using standard methods from the beginning is best.
Baidu Encyclopedia-18650 lithium battery
The upper limit of the charging cut-off voltage of the 48v10a lithium battery is 3.65V, and the charging cut-off current is 3.65V. cut-off is 0.02C. The voltage platform is close to 3.2V. 48/3.2=15 strings*3.65=54.75V In order to ensure battery life, it is recommended that the charging cut-off voltage be 54V.
The discharge cut-off voltage of a single string is 2.5V, so the discharge cut-off voltage of the 48V module is 15 strings * 2.5V = 37.5V , which is a conservative 38 V. Because it is a module, considering the voltage unbalance of a single string, a single string voltage detection needs to be added... It depends on the IC parameters of the protection board that you choose. The cut-off voltage of different IC protection boards is different.
You need to find the datasheet of the selected integrated circuit, which containsthe cutoff voltage of a single cell, then multiply it by the number of strings in the battery to get the cutoff. tension.
Detailed information:
With the continuous development of lithium battery industry , more and more Lithium batteries are being used in more and more devices.
In addition to mainstream lithium polymer batteries on the market, ternary lithium batteries and lithium iron phosphate batteries hold a relatively high market share.
Over time, the market share of ternary lithium batteries has gradually exceeded that of previously mature lithium iron phosphate batteries. Generally speaking, the cell voltage of ternary lithium batteries is 3.7 volts, and that of ternary lithium batteries. Lithium iron phosphate batteries The core voltage is 3.2 volts.
For a littlet number of battery packs, the price of lithium iron phosphate batteries may be lower than that of ternary lithium batteries, but for large capacity lithium batteries, ternary lithium batteries are more cost-effective. However, at present, the market price of lithium batteries is relatively chaotic, with high and low quotes in the market, so everyone should pay attention to it when purchasing products.