[Scientific and Technological Achievements Promotion] Super Capacitor Power Storage and Transformation Equipment

President Xi Jinping delivered an important speech entitled "carrying forward the past and opening up a new journey of global response to climate change" at the climate ambition summit, announcing a series of new measures for China's national independent contribution.

In the white paper "China's Energy Development in the New era" issued by the Information Office of the State Council, it is emphasized that relying on major energy projects to improve the level of energy technology and equipment. These include renewable energy generation, energy storage, advanced power grids and other related projects.

This issue of "Promotion of Scientific and Technological Achievements" brought by Xiao Bian today will introduce to you the super-energy capacitor storage and conversion equipment developed by the Institute of Power Transmission Application Technology of our hospital. This scientific and technological achievement can be applied in a wide range of fields. Please learn about it together with Xiaobian.

science and technology research and development

Super Capacitor Power Storage Transformer Equipment-Super Energy Storage Element

The power conversion system (PCS) and battery management system (BMS) with high quality, high efficiency and high power energy density developed by using super-energy capacitor made of graphene material as storage unit and silicon carbide (SiC) power device and high frequency electromagnetic isolation element can provide high quality medium and low voltage AC and DC power supply for DC bus, AC single phase and AC three phase, ensure the safety of electrical equipment and reduce the power consumption of the system.

 

This energy storage and conversion scheme takes the super capacitor material as the core, and the electromagnetic isolation silicon carbide conversion system is the inverter device, which is a new generation of power consumption scheme.

 

science and technology innovation

Set a number of advanced technology in a super capacitor storage converter equipment and what are the advantages?

Next, Xiao Bian will introduce it to you in detail ~

Advantages of Super Capacitor Power Storage Transformer Equipment

01. High charging and discharging

 

Support 10C charging, 50C discharge. The charging time problem and the discharge power problem are solved. The unit that can supply electricity stores valley price electricity and scenery clean electricity, which is used during peak electricity consumption. Through power conversion technology and intelligent load switching technology, the enterprise can switch the backup power supply without power outages. The backup power supply is supplemented by energy and solar energy in valley power supply section, which solves the problems of backup power supply safety, short-term peak value and power supply expansion, greatly reduces the power consumption cost and power equipment construction cost, and achieves the goal of low carbon emission reduction.

High energy density, high power density, long charge and discharge characteristics

The super-capacitor adopts the technology of "pseudo-capacitor microporous lithium storage", which is the first in China and retains the characteristics of fast charging, low temperature and cycling. Traditional lithium-ion batteries cannot achieve fast charging (damaged electrodes), traditional supercapacitors have low energy density (10 times the weight of lithium batteries), and traditional nickel-metal hydride batteries have low cycle life and low energy density.

The battery capacitor can be charged at maximum 10C and discharged at 50C. This good charge and discharge performance makes it possible for small batteries and high power.

02. High energy density, high power density

Super long charge and discharge times

The energy density can reach 130wh/kg, which is close to the level of lithium iron phosphate battery, and the power density can reach a maximum of 10kW/kg. After actual tests, it is charged and discharged 10000 times at 5C, and the capacitor still maintains 90% of the electricity. According to the calculation of normal charging and discharging times, the service life of 100,000 times can be guaranteed.

At present, the supercapacitor can not only achieve the energy density of the battery, but also retain the high power density characteristics of the capacitor.

03. Super temperature characteristics

It can work normally in the environment of minus 40°C and minus 80°C.

04. has good security

 

Super battery has good safety performance, after 1C6V overcharge test does not fire does not explode. After the acupuncture experiment does not fire does not explode.

 

05. Low cost of energy storage

 

Compared with the existing energy storage method, the cost of super-energy capacitor energy storage itself can be reduced to 0.05 yuan/degree, the cost of super-energy capacitor for energy storage of 1 degree of electricity is 2000 yuan, the service life of 100000 times, 0.02 yuan for each charge and discharge, and the conversion efficiency of chemical energy storage inverter is generally above 98%.

Cost Chart of Existing Energy Storage Methods

Third-party test report

application value

The powerful performance advantage makes the application field and direction of super capacitor storage current equipment very wide.

The following small series will give you a list of some application areas and use scenarios.

01. Plant power management

It can solve the problem that the standby power supply of the current power system starts slowly and the unexpected power failure needs time to switch. Taking off-grid energy storage power supply equipment as an example, it can realize completely seamless switching with the existing power system of industrial enterprises, improve the power supply capacity of the power system by more than 50%, and reduce the power supply construction cost of the power grid by 50%.

Schematic diagram of 700kWh container power system structure

(1) Bidirectional energy storage converter

(2) AC power distribution cabinet

(3) Energy Management and Dispatch System (EMS)

(4) Air conditioning environment monitoring system

(5) Battery energy storage unit

(6) Environmental monitoring system

(7) Battery Management System (BMS)

The whole battery energy storage control and inverter system can realize 200% load conversion, can completely solve the problem of harmonic interference to the existing power grid, and realize the integration of peak, valley, flat switching and photovoltaic energy storage.

02. Hybrid Electric Vehicle (HEV)

The new battery capacitor has high energy density, long cycle period and supports fast charging. When braking and going downhill, the internal combustion engine charges the battery (10C high current charging), and when starting acceleration, the battery provides power (10C high current discharge) to save fuel (20-40%), which is very suitable for hybrid vehicles (HEV).

03. Photovoltaic energy storage

Distributed power station with off-grid application

Power management that can be expanded without increasing fees, peak release, greatly reducing power costs.

Photovoltaic shed for photovoltaic energy storage

Power management that can be expanded without increasing fees, peak release, greatly reducing power costs.

solar street lamp

The energy storage power supply, namely the traditional battery, restricts the promotion and application of solar street lamps. The new battery capacitor energy storage power supply solves the short-term problems of battery life, poor working adaptability and serious environmental pollution.

04. Robot (AGV trolley)

Compared with the traditional lithium battery, the new super capacitor can charge quickly, improve work efficiency, and can provide a solution for the operation of AGV car in low temperature environment.

05. Portable power supply

The high energy density and power density of the new supercapacitor make the field work more convenient. The portable power supply with small size and light weight can drive high-power mechanical equipment. Compared with the traditional backup power supply, it will undoubtedly bring great convenience to the field workers.

Research Institute of Power Transmission Applied Technology

The Institute of Power Transmission Application Technology of our institute was established in November 2016. Relying on the comprehensive technical strength of the Department of Electrical Engineering and Applied Electronic Technology, the State Key Laboratory of Power System and Large Power Generation Equipment Safety Control and Simulation, it has established extensive cooperative relations with domestic and foreign motor design and simulation development institutions and enterprises. The team is headed by Professor Chai Jianyun, a senior expert from the Department of Electrical Engineering and Applied Electronic Technology of Tsinghua University. The core members of the team come from well-known universities and enterprises at home and abroad. They have many years of practical experience in power transmission and control, energy-saving design and simulation of motor systems, and product research and development, scientific research achievements have been applied to electric power, petroleum, rubber and plastics, papermaking, transportation, machinery and other industries, and have established technical cooperation relations with many enterprises in Shandong, Hebei, Jiangsu, Anhui, Shaanxi and other places.

 

Technical docking and business negotiation

Contact: Guo Qijiang

Fixed telephone: 022-84819376

Mobile Phone: 13332029286

E-mail: guoqj@tsinghua-tj.org

 

Source | Institute of Power Transmission Application Technology

Editor | Zhang Shu

The final interpretation of the above related technologies belongs to the Institute of Power Transmission Application Technology.