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Hayashi,
Look to the patents, a lot is about the electrolytes.
For sure they make the electrolytes themselves OR it is outsourced but the recipy is protected (like Coca Cola). This is not commercial available for sure.
Here a link towards the 8 years:
https://www.xppower.com/resources/blog/electrolytic-capacitor-lifetime-in-power-supplies
A power supply or driver is often 24hrs on and the temperature is on the pcb about 50-60 degrees.
This is why many electronics like led lamps and the first solar power convertors have a typical lifetime of 8-10 years because of using these can type capacitors. For automotive applications, this is simply too short and the temperature conditions are often even higher. Therefore I think automotive is interested also for applications even if the capacity Is not needed. Let’s see...
The more I read I believe cpx has a technology edge over many rivals enhanced by the 3v offering.
Some of it certainly relates to the liquid electrolyte.
Does cpx make this or get it supplied?
I also liked the sealing technology they patented. One of the big problems with current can capacitors is the limited lifetime of 8 years due to the evaporation of the electrolyte.
The laminated design form Cap-xx solves this and I even think they have developed the manufacturing ip for mass production.
Nice work. Chapeau to all involved !
Here are all patents from cap-xx described.
https://patents.justia.com/assignee/cap-xx-limited
Everytime I read them I’m wondering how they were able to obtain patents based on these wide descriptions. They really cover most of the batteries and supercapacitors which are currently available. Well done !
I think this is the one which is difficult to work around since it is the principle of a traditional capacitor with a minimal power value and thus making it a supercapacitor and I think even a battery.
The thing I’m doubting about is the immersing in the electrolyte which means it is assuming a fluid or jelly substance and not a solid material (maybe someone knows how maxwell technology looks like ?)
Charge storage device
Patent number: 7382600
Abstract: A charge storage device comprising: a first electrode; a second electrode being opposed to and spaced apart from the first electrode; a porous separator disposed between the electrodes; a sealed package for containing the electrodes, the separator and an electrolyte in which the electrodes are immersed; and a first terminal and a second terminal being electrically connected to the first electrode and the second electrode respectively and both extending from the package to allow external electrical connect to the respective electrodes, wherein the gravimetric FOM of the device is greater than about 2.1 Watts/gram.
Type: Grant
Filed: September 19, 2005
Date of Patent: June 3, 2008
Assignee: CAP-XX Limited
Good question PP. I wonder., slightly different though, looking up datasheet specs. CPX's products have energy density up to 10 watt hours per kilogram, Maxwell no more than 6. All due to the conductivity of the materials and their surface area - layers of certain types carbon.
Kencarv - thanks for your comment. I wondered if the energy density may be part of CAP-XX's patent infringement case against Maxwell/Tesla.
https://auto.hindustantimes.com/
Earlier, Elon Musk had suggested that Tesla may be able to mass-produce longer-life batteries with 50% more energy density in three to four years.
Musk may also reveal details about his company’s Roadrunner project, a proprietary battery cell manufacturing process, which debuted early this year.
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No mention of maxwell there - however take a look at this
https://www.tesmanian.com/blogs/tesmanian-blog/tesla-battery-day-will-show-how-to-scale-the-cell-production-in-a-different-level
Tesla acquired Maxwell Technology about a year ago. Maxwell specializes in the production of ultracapacitors, though this is not what Tesla plans to leverage for their EVs. Maxwell offers a new way to build lithium-ion batteries. The new breakthrough is called dry battery electrode technology.
Maxwell originally developed the dry electrode fabrication process to improve production efficiency and lower manufacturing costs for its ultracapacitor products. The innovation later proved to enhance the performance of battery cells, while also having a cost advantage over existing manufacturing processes. Maxwell's dry electrode technology, applied to battery cell fabrication, has the potential to increase the range and reduce the cost of Tesla's cars, two critical success factors for any EV manufacturer.
^ that's the bit they've stolen. Hence the langague use around the Murata production line in the recent RNS