Lithium battery factory plus talk about the lithium battery shell with aluminum shell or steel shell is good? Nowadays, there are so many kinds of lithium battery shells on the market. But according to Cunningham Electric lithium battery manufacturers understand that the most or steel and aluminum shells. Whether it is a steel or aluminum shell, there is no impact on the performance of lithium batteries, battery performance is mainly the design and material system, process decisions, steel and aluminum shells are only shell materials.
Lithium battery manufacturers talk about the lithium battery shell with aluminum shell or steel shell is good?
Lithium battery shell is mainly divided into hard shell (steel shell, aluminum shell, nickel-plated iron shell, etc.) and soft package (aluminum-plastic film) of two kinds. Lithium battery shell is now the best-selling aluminum alloy shell on the market, aluminum alloy is also one of the metal types. Aluminum alloy has low density, but high strength, close to or more than high quality steel, and good plasticity.
With the needs of practical applications, the energy density, safety and cycle life of lithium batteries put forward higher requirements, in addition to the use of high specific energy electrode materials, reduce the quality of the battery shell structural parts, improve its strength and heat dissipation performance, is one of the important ways to improve battery performance.
Lithium battery aluminum case is better than steel case. Although the price of aluminum shell is slightly higher than the cost of steel shell, but the abundant supply of resources, large scale construction, advanced technology, small environmental impact, energy saving and emission reduction, high profitability. However, the steel shell has superior performance, high impact resistance, and will still dominate the market in the future from the market, technical, economic, engineering and other perspectives of research and analysis. The unsafe capacity of steel shell is not high, because once the steel shell short circuit, it will explode, the aluminum shell will not have this situation, the aluminum shell has an explosion-proof hole on the top of the core. And the capacity of the aluminum shell is also high, now the lithium battery is used aluminum shell.
Most of the early square lithium battery steel shell, mostly used for cell phone batteries, after the weight of steel shell than low energy, and poor security, gradually replaced by aluminum shell and soft packaging lithium batteries. But in the column lithium battery, there is another scene, the vast majority of lithium battery manufacturers are steel as the battery shell material.
Aluminum shell is a lithium battery shell made of aluminum alloy material, mainly used in the square lithium battery, lithium batteries using aluminum packaging is the reason for its light weight and safer than steel shell. Aluminum shell alloy material construction has significant safety performance considerations, this safety performance can be expressed in terms of material thickness and bulge coefficient.
The reason why the same capacity of lithium battery is lighter than the steel case is because the aluminum case can be made thinner. From the working mechanism of lithium batteries, when charging, lithium ions are de-embedded and the volume of the positive electrode expands; when discharging, lithium ions are embedded from the positive electrode and the negative electrode expands; both will cause the entity to expand, and the bulge coefficient can be reduced by a proper alloy formulation.
Lithium battery aluminum shell, steel shell, plastic shell each have advantages and disadvantages, can not simply judge, depending on the use of occasions, depending on the judging criteria. Aluminum shell lithium battery energy density is higher than the plastic shell, aluminum shell itself because it is a metal shell to do insulation treatment; plastic shell itself has insulating properties, the end cap pole column at the processing is simple, pack when it is also more convenient, but its energy density is lower than the aluminum shell.
Because the aluminum case of lithium battery has the above relative advantages, so the aluminum case lithium battery is the mainstream of the current liquid lithium battery, almost used in all areas involved in lithium batteries. Light weight and safety and the resulting performance advantages make the lithium battery aluminum shell become the mainstream of the shell, lithium battery aluminum shell is still evolving to high hardness and light weight technology, which will provide the market with a more technically superior lithium battery products.
Summary: lithium battery shell material steel and aluminum shells have their own advantages, so the selection process also needs to be based on their own needs to choose. I hope this article can help you.
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