07/06/2024
A lithium-ion (Li-ion) battery is composed of several key components, each playing a crucial role in its functionality:
1. **Cathode**: This is the positive electrode made of a lithium metal oxide (such as lithium cobalt oxide, lithium iron phosphate, or lithium manganese oxide). It determines the battery's capacity and voltage.
2. **Anode**: This is the negative electrode, typically made of graphite. During discharge, lithium ions move from the anode to the cathode, and during charging, they move from the cathode to the anode.
3. **Electrolyte**: A lithium salt dissolved in a solvent, such as a mixture of organic carbonates. The electrolyte facilitates the movement of lithium ions between the cathode and anode.
4. **Separator**: A porous polymer membrane that prevents physical contact between the anode and cathode while allowing lithium ions to pass through.
5. **Current Collectors**: These are made of copper (for the anode) and aluminum (for the cathode). They collect the electrons generated during the electrochemical reaction and transmit them to the external circuit.
Together, these components enable the battery to store and release energy efficiently.
The Bureau of Indian Standards (BIS) provides certification for various products, including batteries, to ensure they meet specified standards of quality, safety, and reliability.
Relevant Standards for Batteries:
IS 16046 (Part 1 and 2): Safety requirements for portable sealed secondary cells, and batteries made from them, for use in portable applications.
IS 16270: Safety requirements for lithium-ion cells and batteries used in electrical and electronic equipment.
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