from chemistry to pack
In previous articles we’ve highlighted the benefits of aluminium cell housings for 4680 battery cells like improved thermal management and gravimetric energy density and explored the structural performance of 4680 cans made from Speira ION Cell 3-CB and Speira ION Cell 3-CS1,2,3. It has been shown that high strength aluminium grades like Speira ION Cell … Read more
A commonly used material for the pouch cell structure is aluminium laminated film. This pouch material typically consists of a layer of aluminium (Al), coated on the outside with a layer of nylon and/or polyethylene terephthalate (PET) and on the inside with a layer of polypropylene (PP). There are not many configurations of this material out there, most … Read more
Jiang Jibing, Vice President of EVE Energy and Director of the Battery System Research Institute, was invited to attend the China Electric Vehicle 100 Forum (2025) and delivered a keynote speech on “OMNI All-Purpose Battery”. A look at the 4 reasons why EVE believe in large cylindrical cells [2]: Author: Woody Wu at power9tech.cn Standardization Perfectly Aligns … Read more
When we talk about Stacked vs Wound cells we are considering the Anode-Separator-Cathode stack and how that is assembled within a battery cell. Kong et al [1] show a simple schematic of the two arrangements. Pouch and Prismatic cells can be stacked or wound, but what is the advantage and disadvantage of each approach? Cell … Read more
What makes a Blade or Prismatic cell what it is? Blade cells are long, thin and have a terminal at each end. But so do some prismatic cells. Is it the ratio of the side dimensions? The following graph shows data from the Cell Database where we have plotted the ratio between the middle dimension … Read more
In Li-ion batteries, the cathode thickness will heavily influence the energy density of the cell. A thicker cathode means there will be more cathode active material in the electrode. This increases the capacity of the electrode and hence increase the energy density of the cell. However, this relationship is not linear. Using the CAMS model, … Read more
VDA prismatic cells are based on a standard written by the German automotive industry. VDA stands for Verband der Automobilindustrie (German Association of the Automotive Industry). Prismatic Cells As the name suggests these are a prismatic block, normally with the outer case made from aluminium. Again these come in many different formats and there is … Read more
Recent industrial and academic studies have shown that aluminium cell housings can provide several benefits in terms of thermal management and gravimetric energy density in particular1,2,3. However, as Cell-To-Pack and Cell-To-Chassis approaches arise the battery cell and therefore, the battery cell housing, become part of the structure of the battery electric vehicle contributing with their … Read more
The anti-shunt tab design is there to enable a better resistance micro spot weld. The busbar for a cylindrical or prismatic cell has to be welded blind. Meaning you can only weld from the topside of the busbar as the cell itself is a sealed system. The anti-shunt tab design shown on the left welded … Read more
Isolation Tests on Assembled Cells come in a number of forms, but the intention is to check for: Although very rare, cell internal short circuits are a leading cause of battery thermal runaway. They are a major safety issue for any application of a battery pack. Hence there is a requirement to prevent them and … Read more