Battery: ProLogium confirms its targets

The construction of the Dunkirk factory (59) is progressing rapidly! Vincent Yang, founder and CEO of ProLogium, visited Paris and confirmed that business is going well.

The first cells will be produced here in 2028, followed by a ramp-up phase in the second half and the first large-volume deliveries in the second quarter of 2029. Generation capacity will be 4 GWh in 2030, then increase to 12 GWh in 2032. It is known that the factory is large enough to reach 44 GWh in the long term.

Future power growth doesn’t worry Prologium’s founder. Indeed, this trained engineer, Vincent Yang, with over 28 years of experience in batteries, has in the past produced up to a million units per month! “He knows everything from A to Z,” says one collaborator.

So Prologium is not actually a start-up; The Taiwanese company opened its first pilot line in 2013 and has continued to improve jobs and processes since then. In 2024, the company opened a factory near Taipei (which has already produced more than 800,000 cells) that will validate the processes that will be implemented in Dunkirk.

Energy density of 360 Wh/kg confirmed

Prologium could undoubtedly have gone faster at Dunkirk, but the company wanted to start its French adventure with the latest technology in fourth-generation solid-state batteries. Therefore, there is a one-year delay compared to the initial plan.

However, many cells and batteries are currently in testing in Europe and the United States. ProLogium has been working with Mercedes-Benz for a long time and we can also add FEV, Rimac and OPmobility. The list is much more comprehensive, but Vincent Yang is keeping it under wraps and promises it will be announced soon.

With this fourth generation battery, the general manager confirms that, above all else, he will respect his promises. In particular, an intensity of at least 360 Wh/kg. Because most of the time, the features described in the laboratory in solid-state batteries cannot withstand mass production. His passed the caudin forks of TÜV Rheinland, which confirmed an energy density of 360 Wh/kg. Nearly twice the energy density of current batteries.

©ProLogium

Additionally, ProLogium claims that with its technology, its batteries will not be affected by any thermal runaway. But above all it promises to partially solve the difficult equation combining autonomy/recharging and cost.

Charging in six minutes

Density logically has a significant impact on many factors. Thus, a 45 kWh ProLogium battery (approx. 450 km range) weighs only 220 kg. Mass gain, which positively affects the efficiency of an electric vehicle and reduces the costs associated with raw materials and therefore the price of kWh and battery pack. We’re talking 20-30 percent less here.

©ProLogium

Since the Prologium battery can operate at 400 V with a charging time of approximately six minutes (5-80%), the general manager also saves on charging infrastructure. Without any specific infrastructure, that’s the equivalent of a full tank of gas.

The use of a 400 V architecture (cheaper than 800 V) makes it possible to start a virtuous cycle that extends to charging point operators who will not have to invest in very powerful and very expensive terminals. Above all, they will see more than two cars per hour passing through their terminals.

300 million dollars will be raised in the public offering

Prologium has applied for and continues to apply for numerous patents to develop its technology. In 2025, the company’s total reached 1,052, and Vincent Yang promises that this number will be 1,250 this year and more than 1,500 in 2027. More than 70% of them are active.

And to continue developing their technology, ProLogium will go public in New York through a Spac (Special purpose acquisition company). The goal is to raise $300 million by putting 8 percent of its capital into the market. This will add a value to the company of approximately $3.8 billion.

The main target of ProLogium batteries is naturally automotive, but the company is not limited to that. In fact, it is also targeting other sectors where growth is promising, such as data centers linked to artificial intelligence, defense and even robotics, and especially humanoid robots in full development. ProLogium works with Delta in this area, especially in the United States.