Analyze the advantages and disadvantages of lithium batteries

As a kind of rechargeable battery, lithium battery has advantages such as high energy density and has been widely used in electronic products. (1) Some early rechargeable batteries, such as nickel-cadmium batteries, have a memory effect. If the battery is not used up and start charging, then the next time the battery is discharged to this place, it cannot be put down, resulting in a decrease in battery capacity; if the battery is not fully charged at the beginning of the discharge, then the next time the battery is charged to this place, it will not be able to charge. Resulting in reduced capacity. Therefore, the best way to use a battery with a memory effect, such as a nickel-cadmium battery, is to recharge it after use. Lithium batteries have no such effect. On the contrary, if the lithium battery is overcharged, it will damage the capacity of the lithium battery. Therefore, do not fully charge lithium batteries. (2) Lithium batteries are extremely harmful whether they are overcharged or overdischarged. If overcharged, the capacity of the lithium battery will be permanently damaged; after charging, there is a danger of explosion. However, it is not dangerous to charge lithium battery equipment at night, because of course it will stop charging when it is fully charged, and may reduce the current to a minimum (to make up for the small amount of electricity consumed at night). In fact, the $10 18650 lithium battery that I often make by myself has a built-in maintenance panel, which I believe will also be on my phone. If it is over-discharged, the lithium battery will not be charged with electric energy and cannot be used directly. It must be specially activated; once again, it will be completely starved to death and completely unusable. Therefore, since the lithium battery itself must have a small self-discharge, it is necessary to ensure that the device must have a power source before long-term storage of lithium battery equipment, so as to prevent battery starvation; every time, check whether it is necessary to charge. (3) The life of a lithium battery is indeed related to the charging current (or charging rate). Therefore, it can be said that the life of a lithium battery is related to the power supply. Generally speaking, with fast charging, the service life of lithium batteries will be lower. However, as long as the current does not exceed the overflow of 1 hour, the impact of the charging rate on the life is not significant. When charging with power banks, computer USB ports, etc., the single-minded problem is that the power supply current is relatively small, and the charging is very slow; in terms of battery life, there is no harm. Except for extremely poor chargers, current equipment does not pick up charging power at all, unlike the previous mobile phone battery that had to be assigned a special charger. The slower charging current will protect the battery. (4) The best operating temperature for lithium batteries is room temperature. Using and charging lithium batteries at high temperatures may result in long-term storage, thereby permanently reducing battery capacity. Charging lithium batteries at low temperatures (<0°C) may be a permanent hazard, but only at low temperatures will the capacity of lithium batteries temporarily decrease and will recover after returning to normal temperature. It is possible to store lithium batteries at low temperatures, but the storage time at low temperatures cannot be too long. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages and disadvantages of lithium iron manganese phosphate batteries and lithium cobalt oxide batteries?