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Supercapacitors, also known as electrochemical capacitors, electrical double-layer capacitors, gold capacitors, and farad capacitors, were adopted in the 1970s and 1980s to pass polarization. Electrolyte to store energy as an electrochemical element. It is different from the traditional chemical power supply. It is a power source between the traditional capacitor and the battery and has special performance. It mainly relies on electric double layer and redox pseudo-capacitor to store electric energy. However, there is no chemical reaction in the process of energy storage. This energy storage process is reversible, and it is precisely because this super capacitor can be repeatedly charged and discharged hundreds of thousands of times. The basic principle is the same as that of other types of electric double layer capacitors, which utilizes a double electric layer structure composed of an activated carbon porous electrode and an electrolyte to obtain a large capacity.
The outstanding advantages are high power density, short charge and discharge times, long cycle life, and a wide operating temperature range. This is the largest capacity among the double layer capacitors that have been put into mass production in the world.
New energy vehicles are booming in the Chinese market, prompting the developing supercapacitors to be regarded as the most promising energy storage devices in the future. Yang Yusheng, an academician of the Chinese Academy of Engineering, stated: "We must improve the technology of supercapacitors and achieve localization of high-performance materials, substitute imports, and reduce costs."
“The application of supercapacitors should be further expanded to promote the wide application of supercapacitor products with excellent energy storage characteristics, high power characteristics, and environmental characteristics.†Cai Dan, Chairman of Liaoning Boeige Electronic Technology Co., Ltd. (hereinafter referred to as “Baigeâ€) The reporter of Science and Technology Daily told the company that its company spent more than 10 years and devoted most of its energy to the independent research and development of super capacitor technology.
During the period of technology research and development, in a small laboratory, Cai Dan’s mind contained a variety of experimental data. It was a common thing to stay awake during the next two or three days. At that time, the market for ultracapacitors was still relatively narrow, and users could not quickly recognize and accept them. Today, its products incorporating advanced electrode activation technology are of stable quality. “BIGCAP†series supercapacitors have high pressure resistance, single cell withstand voltage of 2.8V, and long-term operation is more stable.
The technical team has accumulated technology for more than 10 years and has extensive experience in manufacturing supercapacitors, and has participated in the research of supercapacitors for electric vehicles in the National 863 Program.
Trump Technology: Zero Leakage High Temperature
When it comes to its core technology, it is a patented utility model patented technology. Not only can the zero-leakage guarantee be guaranteed, but it can also withstand high temperatures of 85°C, greatly satisfying the needs of industrial products.
As a kind of energy storage element, the button-type super capacitor is widely used in the backup power supply of instrumentation and clocks. It has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection.
It is understood that button-type supercapacitors have a positive electrode case, a positive electrode sheet, a separator, a negative electrode sheet, and a negative electrode case, which are sequentially arranged from top to bottom. A sealing ring is provided at the junction between the positive electrode case and the negative electrode case. An electrolyte is disposed between the positive and negative electrode shells, and the special feature thereof is that a liner shell is provided between the positive and negative electrode sheets or between the negative and negative electrode sheets.
Wu Qiuju, manager of Boeige Technology Department, told the reporter: “At present, when the button-type supercapacitors are assembled, the positive and negative electrode shells are bonded to the pole pieces. To ensure its conductive properties, high-temperature heat treatment is required; positive and negative electrode case crimp sealing. There is a sealing ring at the connection between the two, and the sealing ring is limited by the heat treatment temperature. After the heat treatment, the sealing ring needs to be placed on the shell, the assembly process is cumbersome, and there is a problem of high leakage rate, resulting in a long service life. Shortened and easy to pollute the use environment."
Conventional supercapacitors can withstand high temperatures up to 65°C to 70°C. Boeig's button-type products increase this temperature to 85°C. "This product better meets market demand in smart meters, distribution networks and other fields." Cai Dan said.
At the same time, the quality of the electrode and the protection of the processing technology, the electronic binding force between the electrodes is more solid, making the BIGCAP series has a relatively low internal resistance, good consistency, strong stability, suitable for medium and high power discharge demand.
Material properties are key
A supercapacitor is an electrochemical element that stores energy by polarizing electrolytes.
Super capacitors started earlier in the United States, Japan, South Korea and other countries, and their products and technologies are relatively complete. The industrialization of domestic supercapacitors began in the late 1990s. The use of independent research and development and the introduction of technology to convert supercapacitors to mass production of industrial products.
Supercapacitors can be divided into high-power and medium-low power capacitors according to their power. High-power supercapacitors are mainly used for electric vehicles, locomotives, and power systems. Low- and medium-power supercapacitors are mainly used for smart meters, industrial controls, and solar power. Switch and other fields.
According to reports, most domestic manufacturers are committed to the development of high-power supercapacitor products, mainly for electric vehicles. With the support of national policies, certain progress has been made, and due to the short research and development time and the weak technical foundation, there is still a big gap between product quality level and US products; medium and low-power products have already formed industrial applications for industrial products. Due to the low technical threshold and fierce market competition, domestic small and medium-sized supercapacitors occupy a large market share in the low-end and mid-to-low-end fields. In the high-end fields, the technological strength, equipment automation, and other gaps are still inferior to foreign products.
“Now, the key materials for supercapacitors such as activated carbon, separators, and electrolytes are still based in Japan and Germany, and the material determines the improvement of the characteristics of supercapacitors. Under the circumstance of lagging domestic material research, it is difficult to improve the performance of supercapacitors. "Cai Dan said.
Further expand the application
In the initial stage of product launch, their products could only be applied to toy cars. After successful installation, they found that the toy car had no electricity when it was just 1 meter away. Cai Dan and his technical team can only trial and error, from 1 meter to 3 meters, 5 meters, and later can use a longer time, one can imagine that this process is very difficult.
After careful analysis and research, the technical team believes that the company's foundation lies in years of technical accumulation and high-quality supercapacitor products. Compared with domestic products, the quality of domestic supercapacitors has been upgraded. Today, Boeig has achieved refinement and large-scale development from the design, R&D, production, and sales of supercapacitors. Over 10 series and more than 100 varieties are the result of continuous efforts over the years.
“Now it is not only able to meet the needs of various fields, but also widely used in smart meters (gas meters, water meters, meters, etc.), power equipment, medical equipment, solar wind energy products, toys, electric cars, etc. It can also be used as a backup power supply to provide short-term High power characteristics." Said Cai Dan.
In the face of the yet-too-mature market situation, Cai Dan believes that the state should support the super capacitor industry with great emphasis on the development of advanced materials and automation equipment, and put support on mature production-oriented enterprises. Develop research for the main body.
“It should form a unified industry standard, standardize the market order, further expand the application of supercapacitors, and promote the widespread use of supercapacitor products with excellent energy storage characteristics, high power characteristics, and environmental protection characteristics.†Cai Dan suggested.
Talking about the development of Boyer, Cai Dan said: “The problem we face is the issue of time. The super capacitor market is developing rapidly. To seize the opportunity, we need to grab time.â€
"To become the strongest super capacitor manufacturer in China, we need to further expand the product application field and expand the product range. From the expansion of small and medium-sized power markets to the large-scale occupation of the high-power super capacitor market, more investment is needed for technology research and development and industry. Input." Said Cai Dan. (The text of the reporter epic)
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