18650 battery usage time becomes shorter, Let's delve into the reasons why batteries have a shorter lifespan (shorter battery life) when used.
1. External factors lead to shorter battery usage time
(1) There are two main aspects to the changes in electrical appliances: one is that more appliances are used, resulting in an increase in power; Another issue is the aging of electrical appliances, which increases the resistance of electronic components and makes them more prone to heat and power consumption. Or switch to a higher power appliance, which consumes electricity faster.
(2) Environmental changes: low temperature, high temperature
The discharge efficiency of batteries varies at different ambient temperatures. In low-temperature environments, such as -20 ℃ or below, the internal raw materials of the battery are affected by low temperatures. If the electrolyte is frozen, the conductivity will greatly decrease. In addition, other raw materials are frozen, and the chemical reaction activity will decrease, resulting in a decrease in capacity. This is manifested as a shortened battery life, and some may even be unusable. If the temperature is too high, it will accelerate the aging of the internal materials of the battery, increase the resistance, and also reduce the capacity of the battery, greatly reducing the discharge efficiency, resulting in a shortened or unusable use time.
2. The battery itself has problems and the usage time is shortened
If you purchase a new battery and find that its durability has decreased after a short period of use, there may be several reasons for this:
(1) The quality of battery raw materials used in production and manufacturing is poor, and the battery raw materials are unstable. During operation, the materials are prone to aging or expansion in chemical reaction cycles, leading to an increase in internal resistance and capacity degradation. This is directly reflected in fast electricity consumption, weak discharge, and lack of power.
(2) The production equipment technology level of manufacturers is limited. In the production process of batteries, due to the limited process level, such as many burrs on the electrode pieces, poor welding of the current collector, insufficient capacity aging, etc., it will affect the quality of battery products.
(3) The battery cells are not consistent. Some larger batteries, such as electric vehicle batteries, drone batteries, electric bicycles, etc., are composed of many battery cells connected in series and parallel. In this way, there will be capacity differences, internal resistance differences, voltage differences, etc. between the battery cells. As they are used, these data will increase, ultimately affecting the battery capacity. In other words, the battery capacity will decrease, and the actual use will naturally become shorter.
If you feel that the battery has been used for a longer period of time and can be used for a shorter period of time, it indicates that the battery was originally of good quality, but over time, the above-mentioned problems will occur inside the battery, and the capacity will also decrease.
3. Improper use leads to shortened battery life
The
lithium battery is not used according to the instructions, such as frequent overcharging and overdischarging, and being discarded casually when not in use, resulting in internal deformation of the battery or loose materials inside the battery cell. These inappropriate usage behaviors can accelerate the aging of the battery material, increase internal resistance, capacity decay, and naturally shorten the battery's usage time.
