What is the structure of energy storage battery?
The composition structure of energy storage battery is diverse, depending on its specific chemical types and design, but generally, they are composed of several core parts.
The following is a detailed answer to the structure of the energy storage battery, which mainly includes 6 aspects:
1. Positive (Cathode):
The positive electrode is an electrode with a higher potential in the energy storage battery, which is usually made of a material that can be embedded and decustered with lithium ions. For example, in lithium ion batteries, the orthopedic materials may be licoo oxides (LICOO ₂), lithium iron phosphate (LIFEPO ₄), or ternary materials (such as NCA, NMC).
The choice of positive materials directly affects the energy density, voltage platform and cycle life of the battery.
2. Negative electrode (anode):
The negative electrode is a lower electrode in the energy storage battery. The material also needs to be capable of embedding and dehydration. In lithium ion batteries, the negative electrode material is usually graphite or silicon -based composite material.
The performance of negative materials has an important impact on the battery capacity, energy density, and cycle performance.
3, electrolyte:
The electrolyte is an ion conductive medium in the energy storage battery, which allows lithium ions to migrate between positive and negative electrodes to complete the charge and discharge process. The type of electrolyte can be liquid (such as lithium salt dissolved in organic solvents), solid or gel state.
The performance of the electrolyte directly affects the safety, energy density and cycle life of the battery.
4, diaphragm:
The diaphragm is located between the positive and negative electrodes, which plays a role of isolation and negative poles and preventing short circuits. At the same time, lithium ions are allowed to pass. The diaphragm is usually made of polyolefin material (such as polyethylene and polypropylene), which has excellent ionic transmission and mechanical strength.
5, battery shell and packaging material:
The battery shell is used to accommodate and protect the internal components of the battery to prevent the erosion of the external environment and the leakage of internal material. Packaged materials are used for sealing batteries to ensure the safety and reliability of the battery.
6. Other auxiliary materials:
Energy storage batteries may also include auxiliary materials such as set flows, conductives, adhesives, etc. These materials play a role in conductive, fixed electrode materials and enhanced electrode structure stability in the battery.
In general, the composition of energy storage battery is complex and fine, and each part cooperates with each other, which jointly determines the performance and service life of the battery.
