The 2020 Lithium-Ion Battery Guide: The Easy DIY Guide To Building Your Own Battery Packs (Lithium Ion Battery Book Book 1) by Turner Anthony

Author:Turner, Anthony [Turner, Anthony]
Language: eng
Format: azw3
Published: 2020-05-05T16:00:00+00:00

A BMS can prevent a cell from operating outside of its predefined safe limits by using a protection circuit.

Protection Circuits

Because they have high energy densities, there are potential risks that come with using lithium or nickel-based batteries. This is why certain safety requirements and protocols were made to reduce the global risk of transporting and operating these batteries. A basic safety device used in a battery is a fuse that breaks in high current flows. Unfortunately, some of these fuses can render the battery useless; others are more forgiving and reset once the risk has passed. An essential component of every lithium battery pack is the safety protection from overheating. We have seen so far that a rise in temperature can have drastic effects on a lithium-ion battery. Gassing is another major issue faced by Li-ion cells; hence, they have vents to release gases produced in the cell. These vents are resealable, but if the internal cell pressure becomes too much because gases aren’t escaping fast enough, venting with flames can occur. This can cause the top of the cell to pop off. In such a case, the battery is said to be in disintegration, and it should be left to burn out in a safe place. It is important to provide physical protection to ensure the safe operation of your end product, which, in this case, is your DIY lithium battery pack.

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