The core technology of Maxwell supercapacitor
Along with the development of new energy technology with each passing day, lithium batteries, fuel cells and other related products, much attention has been paid to technology and the same as the super capacitor energy storage device may not be known by public.
Due to its short charging time, long service life, good temperature characteristics, energy saving and green environmental protection, super capacitor has been widely recognized by the industry, and the industry has grown rapidly.
It is widely used for public transport, power grids, and a wide range of industrial applications.
As long as the moving object, the supercapacitor can be used to capture its energy and reuse it.
Supercapacitor is a double - layer structure that USES activated carbon porous electrode and electrolyte to obtain super power capacity.
Unlike using chemical battery, super capacitor charge and discharge process is always a physical process, the performance is very stable, so high safety coefficient, good low temperature performance and long service life and free maintenance.
The core components of supercapacitors are electrodes, and the manufacturing process of electrodes is divided into two technologies: dry electrode and wet electrode.
The dry electrode technology is only used to process the electrode through the dry mixture of activated carbon powder and adhesives.
In the process of making the electrode, the wet electrode technology needs to be added to the liquid solvent besides the activated carbon powder and adhesive.
Since liquid solvents affect the performance of supercapacitors, the drying process is also used to remove the solvent from the electrode.
This means that the wet electrode technology process is longer and has additional production costs than the dry electrode technology.
In addition, drying treatment is difficult to remove the solvent thoroughly.
In the working process of the supercapacitor, the solvent impurities react to produce additional material, affecting the performance of the electrode and the electrolyte.
The gases that are produced are more likely to accelerate the aging of supercapacitors.
Therefore, the super-capacitor with wet electrode technology has relatively short life span, low reliability and poor stability.
The following table lists the specific comparison of dry electrode technology and wet electrode technology:
The dry electrode technology also has advantages in production cost.
Industry leading super capacitor manufacturer, said Maxwell from coconut shell, apricot shell, wheat and other materials to extract the core material of super capacitor - carbon, the application of new materials is also a way to reduce costs.
Maxwell has focused on the electrode on the research and development, production and manufacturing of most of the patented technology, more than 35 patents and proprietary dry electrode process has produced a super capacitor excellence performance advantages.
This process can produce the capacitors with the lowest total cost.
It is also more environmentally friendly and energy efficient, and can be recycled for 100 percent because of the high purity materials used for solvent-free residue.
Maxwell supercapacitor patent dry electrode process
In China, the most widespread application of supercapacitors is the urban hybrid bus braking energy recovery system.
According to statistics, at present in China's super capacity hybrid passenger car ownership has more than ten thousand vehicles, yutong, jinlong, golden dragon, hagrid, CSR and other well-known domestic more than a dozen car companies have super capacity has been successfully applied to new energy cars, energy conservation and emissions reduction, fuel-efficient environmental protection effect.
It can be said that Maxwell supercapacitor has played an active role in promoting the development of China's hybrid bus market.
In June, Maxwell technologies introduced the 2.85V/3400F supercapacitor, which set up new energy, power and durability standards for the industry.
In consideration of the difference of road condition of domestic buses, Maxwell has also made technical improvements to supercapacitor modules to enhance seismic performance.
Launch DuraBlue shock and vibration technology at the same time, meet the most demanding transportation environment, compared with the similar competitive products based on super capacitor resistance to vibration and shock resistance can be improve nearly three times and four times respectively.
Since raw materials are activated carbon, without heavy metals, the safety performance of supercapacitors is unquestionable.
After comprehensive testing, the electrolyte itself does not have the safety problems such as explosion and fire within the normal application range.
In the case of Maxwell supercapacitor, most of its electrolyte permeates into the carbon electrode, and the flow is very small, and its sealing is good.
In addition, the supercapacitor system also has the protection of electrical aspects in the design. If there is a failure, the protection system will isolate the fault elements and ensure the safety of the system.
Original title: the core technology of Maxwell supercapacitor