Application and development of lithium ion batteries in daily life

Lithium-ion batteries have penetrated into all aspects of modern life. They can provide energy for almost everything in life (such as watches, mobile phones, tablets, portable devices, GPS devices, mobile games, etc.). But the application of batteries in communities, homes, and transportation has just begun, and more precisely, it should start again. With the rapid development of technology in various industries, there are many professional engineers in other fields. They have never stepped into the field of lithium battery before, and now want to have some understanding of lithium battery technology, so this article is written for them.

A battery is a device that realizes the conversion of chemical energy and electric energy. It can not only generate energy but also store energy; while most other energy sources are generated in one place, and need to be stored in another place when applied. For example, the energy of a fuel car is extracted from crude oil, and then stored at the service site until you buy it again and store it in the fuel tank, which can be converted into energy and released when the internal combustion engine burns.

In the chapters of Handbook of Lithium-ion Battery Applications (Warner, 2014), a brief description of lithium-ion battery design, mechanical properties, thermal properties, and assembly of electronic components was given. This article only discusses this at the simplest level to solve problems related to battery assembly. In addition, this article also introduces the status quo of certification testing and the organization of the lithium battery industry, and describes the application, future and development of lithium batteries in some aspects.

Through some news reports about lithium-ion batteries, such as the battery failure of the Boeing 787 passenger plane that delayed the take-off of the new aircraft, and the battery failure 2-4 in Tesla and Chevrolet electric vehicles, it can be seen that the system design of lithium batteries is particularly important. I personally think that the above accident is not a system safety accident caused by the battery, but a system safety accident caused by the battery. The reason I say this is that putting the highest quality and best performance battery in the world in a poorly designed system will still cause various failures, such as life decay, energy reduction, and various safety issues. On the contrary, if a poor battery is used in a well-designed energy storage system, the system may still have a high degree of safety. Therefore, in the future, lithium-ion battery products will be a major trend in the development of the new energy industry.