New Trend for supercapacitors

Supercapacitor is a power type energy storage device with outstanding characteristics of high power, high reliability and environmental protection. 1) High power characteristics: the power density of the super capacitor system can reach 40 kW/kg, the lithium battery can reach 1~3 kW/kg, the EDLC charging and discharging time can reach second level, HUC can reach minute level, and the lithium battery can reach hour level. 2) High reliability characteristics: compared with the lithium battery operating temperature range of 20~+60 ° C and the nominal cycle life of about 5000 times, the working temperature range of the super capacitor can be as wide as 40~+85 ° C, and the charging and discharging times can be as high as 1 million times. 3) Environmental protection characteristics: the super capacitor does not contain heavy metals and harmful chemicals, while the lithium battery cannot be decomposed, which easily pollutes the environment.

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Power grid frequency modulation and hybrid energy storage projects have been intensively implemented in 22 years, the number of vehicle supporting facilities has grown rapidly, and the super capacitor market has ushered in an accelerated turning point. Driven by the two high growth areas of power grid frequency modulation, hybrid energy storage and automobile, the new ceiling of super capacitor is being opened. 1) Grid frequency modulation and hybrid energy storage: under the new power system, the grid frequency stability challenges and upgrades, the wind and solar storage on the generation side is smoothly connected to the grid, the hybrid energy storage system responds to the frequency modulation command, the substation frequency modulation on the transmission and distribution side, the backup power supply of the distribution terminal, and the backup power supply and power source on the power side all need to use power type energy storage devices to provide short-term, high power peak pulses. 2) Automotive field: It is used as the main power supply and safety redundancy power supply under the 12V electrical system, as the wire control power supply under the 48V electrical system, and as the main battery cell in HEV models to help improve the performance and safety of the vehicle. 3) Transportation: The super capacitor can mainly realize the three functions of energy storage/standby power supply, engine starting and energy recovery in the application scenarios of rail transit, buses, trucks, ships, etc. 4) Industry: Super capacitors can be used as backup power and power supply to provide emergency short time and high power pulses for the system in the scenarios of smart meters, wind power pitching, port cranes, etc. Multi application fields have bloomed in an all-round way, and super capacitors have ushered in an acceleration turning point. According to the data of the Super Capacitor Industry Alliance, the global super capacitor market size in 2021 will be 1.59 billion US dollars. It is estimated that it will reach 3.7 billion US dollars in 2027, and the CAGR will be 18% in 21-27.

 

Technological progress, cost reduction and policy driven triple benefit will drive the continuous high growth of super capacitors. Due to the outstanding characteristics of high power and high reliability, supercapacitors are suitable for high power, short-time and high-frequency energy storage. Low energy density and high energy storage cost are two major factors limiting their application scope. In the future, the triple benefits of technological progress, cost reduction and policy driven are expected to jointly promote the rapid growth of the supercapacitor market. 1) Technical progress: the energy density of the hybrid super capacity monomer has been increased to 80Wh/kg, up to 1/3 of the lithium battery, which opens up application space in the fields of minute level energy storage, buses and other fields; 2) Cost reduction: electrodes and diaphragms, which account for 50-60% of the cost of supercapacitors, have been imported for a long time. Local manufacturers such as Yuanli and Cairn have begun to vigorously promote the domestic substitution of upstream materials. The cost of supercapacitors has become an inevitable trend. 3) Policy driven: various ministries and commissions have issued a number of policies to support the development of new energy storage industries, including power based energy storage. Driven by the policy, 2022 will become the first year for the intensive implementation of super capacitor grid frequency modulation projects, and the grid side frequency modulation, power side fire storage joint debugging, and power side primary frequency modulation projects are in orderly progress.

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Post time: Nov-07-2022