from chemistry to pack
A phone battery looks like a simple, sealed slab. Underneath that, five engineering problems are being fought at once, and each one constrains the others: what the electrodes are made of, how fast heat can be pulled out of a space the size of a credit card, how the charging circuit routes power without wasting … Read more
AION Engineering INC When you open the datasheet of a lithium-ion cell, one of the first values to catch your eye is the internal resistance. Typically, it sits there as a single, proud number: ACIR: 15 mOhm. Many engineers look at this number, validate the “quality” of the cell, and integrate it into their vehicle … Read more
It is really interesting to look at cell chemistry and format vs application, because in principle there is nothing stopping us from applying any chemistry or cell format to any application. In practice, however, the market has converged on some clear preferences. Here we have taken the Battery Pack Database and looked at this question … Read more
What triggered the battery revolution: how LFP technology made electric forklifts the only logical choice Author: Max Khabur, Marketing Director ENEROC USA Ask anyone in material handling why electric forklifts are taking the market share from propane and diesel-powered machines, and you will probably get these answers: E-commerce and narrow aisles in warehouses; emissions regulations … Read more
CATL published a document in 2024 that looked at BESS lifecycle and durability [1]. BESS = Battery Energy Storage System and covers everything from Home, Commercial through to grid storage. In this instance CATL were looking at grid storage units. As they point out, the characteristics: when compared to automotive they see the challenges: This … Read more
After gathering lots of data on drones we thought it would be useful to pull together a simple drone power and energy estimation calculator. Plotting the average power demand, hovering demand and maximum power versus flight mass we start to see a relationship. OK, this is log-log and so lots of scatter. Hence: use this … Read more
Historically the inputs to an electricity grid have been large rotating machines that inherently have a large inertia. This means that even with a large change in demand in failure of a supply element the frequency is maintained. A small change in frequency is often an indicator that a change in supply is required. The … Read more
A high level definition of the hybrid system type. The pros and cons and a look at the battery. The mechanical output could be to the wheels of a vehicle, the propeller of a boat or aircraft. The requirements for each system will influence the sizing of the system and the balance between battery storage … Read more
Today, there are already ultralight aircraft powered by batteries, but what about commercial airplanes? Let’s demonstrate it on an example. I will use a 19-seat Dornier 228 as the example, it has a standard fuel capacity of 2390 L (~1900 kg) of fuel which is 22944 kWh of energy. The Dornier 228 consumes ~200 kg … Read more
The mixed chemistry battery pack consists of two types of battery cell with different chemistry in one battery pack. The aim being to offer the best of both chemistries: A look at the power density versus energy density graph. This shows that high power tends to be at the expense of energy. Hence, the question: … Read more