from chemistry to pack
Molicel, the Taiwan-based manufacturer known for producing some of the most trusted high-power lithium-ion cells, is expanding its 21700 product line. Long a favourite in motorsport, drones and aerospace, Molicel is now building a broader portfolio to serve a wider range of performance and energy demands. Their current roadmap outlines three distinct 21700 series: the … Read more
The energy storage industry just crossed another important milestone. CATL has launched the world’s first 9MWh energy storage system built for mass production. The system is called the TENER Stack. This isn’t simply a larger container. Rather than building a single oversized unit that would trigger regulatory and logistical issues, CATL introduced a modular “two-in-one” … Read more
How do different battery chemistries compare in terms of calendar ageing? When we look at battery lifetime the standard method used by industry has two fundamental test regimes as inputs: Here we are focussing on the Calendar Ageing, this is all about how the cell ages just left on a shelf doing nothing. Dubarry et … Read more
A look at battery assembly times based on available reports and data. Cell to Module The Peugeot e208 pack is rather complex looking, but the module is a quite standard 12 prismatic cells in an aluminium box. Module to Pack The Peugeot e208 battery consists of 18 modules assembled into what is a complex battery … Read more
In order to develop cell manufacturing you need a cell manufacturing strategy. This needs to be thought through from access to the raw materials, workforce development, long term financial support and ensuring you have ongoing research. This requires sustained leadership and direction. The strategy for this from the European Battery Alliance (EBA) [2] clearly defines … Read more
Obviously Cell Capacity and Pack Size are linked. The total energy content in a battery pack in it’s simplest terms is: Energy (Wh) = S x P x Ah x Vnom Hence the simple diagram showing cells connected together in series and parallel. What about flexibility in pack size? There are very good reasons for … Read more
Benefits of Aluminium Cell Housing for Cylindrical Li-ion Batteries is based on a 4680 cell concept. The battery industry is targeting larger cell formats, which enable simplified module design and cell-to-pack or even cell-to-chassis solutions. In this regard, hard case battery cells and in particular cylindrical cells will play an important role in enabling the … Read more
Cylindrical Cell Electrode Estimation: An alternative geometric approach. Here we present a simple method for estimating electrode length in a cylindrical cell. The method is equally applicable to other formats since we make an estimation of the total active electrode area. Results require knowledge of one electrode Active Material (AM) chemistry, electrode porosity and thickness … Read more
The cell electrode pressure is required to keep the cell operating at it’s peak performance over it’s lifetime. However, is there an optimum pressure and why exactly does the cell need it? As the cell is charged lithium ions move into the graphite anode and the cell will increase in thickness. Silicon in the anode … Read more
The need for modelling The primary reason why one is interested in having a model of a battery is it allows us to make informed decisions, optimise or control a battery to deliver on its intended applications. For instance, we may be interested in knowing how different material choices, electrode compositions or cell packaging, will … Read more