What fields are lithium-ion batteries used in

What fields are lithium-ion batteries used in?

The first commercialized lithium-ion batteries for home appliances in the first half of the 1990s were used in cameras to meet their needs for compactness and lightweight. Later, it was used in mobile phones that were rapidly popularizing at that time, and the market demand increased instantly. Nowadays, lithium-ion batteries have been widely used in various scenarios in our lives, such as smartphones, laptops, electric vehicles, electric bicycles and other fields.
In fact, batteries can be said to be energy cans. Lithium-ion batteries that can store energy at a high density per unit volume require more safety considerations than other types of batteries. And from the point of using flammable organic solvents, more caution is required in operation than other batteries that use aqueous solutions.

The most important thing to avoid is internal short circuit problem. Internal short circuit refers to a state in which the battery is deformed due to external force and the positive and negative electrodes are in direct contact. The current is concentrated here, causing the temperature to rise and serious accidents such as battery fire. Even very small impurities may cause an internal short circuit once mixed into the battery. This requires the design of a protection circuit so that no excess current flows in the battery, so that the battery can prevent accidents.

Others include the use of cooling devices and other means to keep the battery's working environment below 60°C. It is also important to control the temperature of the battery. Set up a separator between the positive and negative electrodes. If the temperature exceeds a certain temperature, the separator will completely isolate the positive and negative electrodes, etc. Use your brain to use various methods to improve safety.

As mentioned in this lecture, compared with previous secondary batteries, it seems that small, lightweight and high-performance lithium-ion batteries will still be used in various scenarios in our lives in the future