Lithium-ion batteries are becoming increasingly widely used energy storage and conversion devices, enabling a constantly evolving market application path from small to medium to large-scale applications due to their superior electrochemical performance. When discussing the correct use of lithium-ion batteries, we are usually referring to small-scale applications, such as consumer electronics, smartphones, and laptops. This is because large and medium-sized applications are based on the technologies used in small-scale applications, thus sharing common characteristics, while large and medium-sized applications are far more complex.
Typically, medium-sized applications are found in new energy vehicles, where they are generally referred to as power batteries; large-scale applications are usually found in base stations, where they are generally referred to as energy storage batteries. Therefore, when discussing "methods of using lithium batteries," limiting the discussion to small-scale applications aligns with common understanding.
The working principle of lithium batteries is simply to charge them to store energy, discharge them to convert them into other forms of energy and release them, and when they are neither charging nor discharging, they are in an idle state. Therefore, the correct use of lithium batteries can be broadly categorized into three aspects: correct charging, correct discharging, and correct maintenance.
Correct charging method for lithium batteries
1. Charge when needed. Under normal circumstances, mobile phones and laptops will remind you when the battery is low. At this time, you need to charge it in time. Although low battery will not cause direct safety accidents, excessive use will damage the battery structure over time.
2. Fully charge. Lithium battery cells are composed of many components. New batteries are fine, but if they have been used for a long time, the function of some components may deteriorate, which may lead to overcharging safety risks.
Correct way to discharge lithium batteries
First, it's important to understand that the memory effect of lithium batteries is negligible; there's no such thing as eliminating the memory effect through deep discharge. Theoretically, deep discharge of lithium batteries will result in a longer overall cycle life, but the risk is that excessive discharge will lead to excessively low battery voltage, preventing normal charging, sometimes causing long delays in powering on, or even preventing the device from turning on at all. Therefore, it's crucial to prevent over-discharge and charge the battery promptly.
Proper maintenance of lithium batteries
The ideal environment for routine maintenance of lithium batteries can be summarized in four words: well-ventilated and cool. This applies whether the lithium battery is stored independently or in an electrical appliance.
