CN-116364987-B - Electrochemical oxygen pump energy storage system

Abstract

The invention discloses an electrochemical oxygen pump energy storage system which comprises an electric energy input unit, an electrochemical oxygen pump device, a heat storage unit, an oxygen storage chamber, a heat regeneration unit, a battery stack device, an electric energy output unit, a first electrolyte component, a second electrolyte component, a heating unit, a cooling unit, an oxygen outlet pipeline and an oxygen inlet pipeline. According to the electrochemical oxygen pump energy storage system, pure oxygen is continuously prepared from air for storage through the use of the electrochemical oxygen pump device, and the prepared oxygen is generated through the cell pile device according to the oxygen concentration cell principle when needed, so that the electrochemical oxygen pump energy storage system has the advantages of being rapid in starting, clean, free of pollution, high in adjustability, simple in maintenance, continuous in use, easy to deploy and expand and the like, and can conveniently and rapidly respond to various energy storage demands.

Inventors

• LI XIAOJUN
• WANG LIANG
• ZHANG HUALIANG
• LIN XIPENG
• ZHANG SHUANG
• Bai Yakai
• CHEN XINYU
• XU YUJIE
• CHEN HAISHENG

Assignees

• 中科南京未来能源系统研究院
• 中国科学院工程热物理研究所

Dates

Publication Date

20260505

Application Date

20230214

Claims (7)

1. 1. An electrochemical oxygen pump energy storage system is characterized by comprising an electric energy input unit (1), an electrochemical oxygen pump device (2), an oxygen storage chamber (4), a battery stack device (6), an electric energy output unit (7), a first electrolyte component (8), a second electrolyte component (9), an oxygen outlet pipeline (E) and an oxygen inlet pipeline (F); The electric energy input unit (1) is electrically connected with the electrochemical oxygen pump device (2); The electrochemical oxygen pump device comprises a first electrolyte component (8), a first air inlet (a), a first air outlet (b) and an oxygen outlet (e), wherein the first electrolyte component (8) is arranged in the electrochemical oxygen pump device (2), the side surface of the electrochemical oxygen pump device (2) is respectively provided with the first air inlet (a), the first air outlet (b) and the oxygen outlet (e), the first air inlet (a) and the first air outlet (b) are positioned on the cathode side of the first electrolyte component (8), and the oxygen outlet (e) is positioned on the anode side of the first electrolyte component (8); one end of the oxygen outlet pipeline (E) is connected with the oxygen outlet (E), and the other end of the oxygen outlet pipeline is connected with the oxygen storage chamber (4); The second electrolyte component (9) is arranged in the battery pile device (6), and a second air inlet (c), a second air outlet (d) and an oxygen inlet (f) are respectively arranged on the side surface of the battery pile device (6), wherein the second air inlet (c) and the second air outlet (d) are positioned on the anode side of the second electrolyte component (9), and the oxygen inlet (f) is positioned on the cathode side of the second electrolyte component (9); One end of the oxygen inlet pipeline (F) is connected with the oxygen storage chamber (4), and the other end of the oxygen inlet pipeline (F) is connected with the oxygen inlet (F); The electric energy output unit (7) is electrically connected with the battery pile device (6).
2. 2. An electrochemical oxygen pump energy storage system according to claim 1, further comprising a heat storage unit (3) and a regeneration unit (5), wherein the heat storage unit (3) is arranged on the oxygen outlet line (E) and the regeneration unit (5) is arranged on the oxygen inlet line (F).
3. 3. An electrochemical oxygen pump energy storage system according to claim 2, further comprising a heating unit (10) and a cooling unit (11), the heating unit (10) being arranged on the electrochemical oxygen pump device (2), the cooling unit (11) being arranged on the cell stack device (6).
4. 4. An electrochemical oxygen pump energy storage system according to claim 3, characterized in that the first electrolyte component (8) is a solid oxide electrolyte, a phosphate electrolyte, a molten carbonate electrolyte, an alkaline solution electrolyte or a proton exchange membrane.
5. 5. An electrochemical oxygen pump energy storage system according to claim 4, characterized in that the second electrolyte component (9) is a solid oxide electrolyte, a phosphate electrolyte, a molten carbonate electrolyte, an alkaline solution electrolyte or a proton exchange membrane.
6. 6. An electrochemical oxygen pump energy storage system according to claim 5, characterized in that the electrochemical oxygen pump device (2) is of tubular or flat construction.
7. 7. An electrochemical oxygen pump energy storage system according to claim 6, characterized in that the cell stack means (6) is of tubular or flat construction.

Description

Electrochemical oxygen pump energy storage system Technical Field The invention relates to the technical field of energy storage, in particular to an electrochemical oxygen pump energy storage system. Background Along with the urgent demands of energy storage technology in the aspects of power grid peak shaving, power grid reliability improvement, electric energy quality improvement and the like in recent years, the energy storage technology is divided into pumping energy storage, compressed air energy storage, storage battery energy storage, superconducting energy storage, flywheel energy storage, super capacitor and the like according to different energy storage modes. The compressed air energy storage has the advantages of large scale, low construction cost, long service life and the like, and the air is used as an energy storage medium, so that the storage and management of the electric energy are realized through the interconversion of the electric energy and the high-pressure low-temperature air energy, and the compressed air energy storage is one of the large-scale energy storage technologies with the development prospect of more than 100MW and enters the commercial application stage at present. But the construction of compressed air energy storage needs a large-sized compressor, an expander, a large-sized gas storage cave and the like, the mechanical parts of the system are numerous, the control difficulty is great, and the deployment and construction period is long. An electrochemical oxygen pump is an electrolytic cell for the electrolysis of air, which is structurally similar to a fuel cell and is composed mainly of a cathode, an anode and an electrolyte. Under the action of potential difference, oxygen in air undergoes reduction reaction at the cathode of the electrochemical oxygen pump, so that the concentration of oxygen in the cathode chamber is reduced, and simultaneously, oxygen precipitation reaction occurs at the anode to generate oxygen. The reverse process of the electrochemical oxygen pump is equivalent to an oxygen concentration battery, and the principle of the electrochemical oxygen pump is widely applied to the fields of oxygen sensors and the like. How to utilize the characteristics of the electrochemical oxygen pump to electrolyze air to prepare high-purity high-pressure oxygen and the oxygen concentration battery to generate electricity, the existing large-scale energy storage system is improved, and the method becomes a feasible research direction. Disclosure of Invention In order to solve the problems, the invention provides an electrochemical oxygen pump energy storage system. In order to achieve the aim of the invention, an electrochemical oxygen pump energy storage system is provided, which comprises an electric energy input unit, an electrochemical oxygen pump device, an oxygen storage chamber, a battery pile device, an electric energy output unit, a first electrolyte component, a second electrolyte component, an oxygen outlet pipeline and an oxygen inlet pipeline; The electric energy input unit is electrically connected with the electrochemical oxygen pump device; The first electrolyte assembly is disposed inside the electrochemical oxygen pump device; the side surface of the electrochemical oxygen pump device is respectively provided with a first air inlet, a first air outlet and an oxygen outlet, wherein the first air inlet and the first air outlet are positioned on the cathode side of the first electrolyte component, and the oxygen outlet is positioned on the anode side of the first electrolyte component; One end of the oxygen outlet pipeline is connected with the oxygen outlet, and the other end of the oxygen outlet pipeline is connected with the oxygen storage chamber; The side surface of the battery pile device is respectively provided with a second air inlet, a second air outlet and an oxygen inlet, wherein the second air inlet and the second air outlet are positioned on one side of an anode of the second electrolyte component, and the oxygen inlet is positioned on one side of a cathode of the second electrolyte component; one end of the oxygen inlet pipeline is connected with the oxygen storage chamber, and the other end of the oxygen inlet pipeline is connected with the oxygen inlet; the electric energy output unit is electrically connected with the battery pile device. Further, the electrochemical oxygen pump energy storage system further comprises a heat storage unit and a heat regeneration unit, wherein the heat storage unit is arranged on the oxygen outlet pipeline, and the heat regeneration unit is arranged on the oxygen inlet pipeline. Further, the electrochemical oxygen pump energy storage system further comprises a heating unit and a cooling unit, wherein the heating unit is arranged on the electrochemical oxygen pump device, and the cooling unit is arranged on the battery pile device. Further, the first electrolyte component is a solid oxide electrolyte,