from chemistry to pack
A new Nature Energy paper puts a number on it I’ve written before about cell electrode pressure and how it’s applied and lost across a module’s life, and about the practical business of mapping pressure distribution across a pouch cell in operando. Both of those pieces stopped short of answering the question every pack designer … Read more
Author Anita Liu Selecting the right separator for the right cell and application is critical. Material Defines Character Thickness & Porosity: The Balance of Thinness and Permeability Thickness: Typically 5~25 μm. Thinner separators facilitate ion transport and increase overall energy density (by saving space and weight), but raise the risk of being pierced by dendrites. … Read more
AION Engineering INC Safety is at the core of every lithium-ion cell design. To ensure reliable operation in demanding applications, the cell assembly and structure integrate multiple layers of protection. These features collectively reduce the risk of failure, overheating, or explosion. PTC (Positive Temperature Coefficient Device) The PTC acts as a resettable fuse: Applications: CID … Read more
The Current Interrupt Device CID activation pressure is important to understand as this will be the internal cell pressure at which the electrical connection will be opened. Hence the cell will then be electrically disconnected from the external circuit. The pressure increase inside the cell is due to gas formation caused by decomposition reactions which … Read more
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