CN-121546095-B - Lithium air battery, battery system and use method

Abstract

The invention relates to the technical field of lithium air batteries, in particular to a lithium air battery, a battery system and a use method. A lithium air battery comprises a battery shell and a compressed air supply assembly, wherein the battery shell is provided with a positive electrode cavity, the compressed air supply assembly is arranged outside the battery shell, and the compressed air supply assembly is communicated with a positive electrode cavity pipeline. The invention provides a lithium air battery, a battery system and a use method thereof, which are used for solving the problem that the existing air compressor is complex in internal structure.

Inventors

• WANG SHIPENG
• LIU LILI
• MOU MIN
• WANG YUANCHEN
• XIE YURONG
• LI YINSHI
• WANG RUI
• DING ZONGYAO
• ZHANG HAIZHEN
• DENG RUIFENG
• CHEN QIAO
• RUAN HUIFENG

Assignees

• 华电电力科学研究院有限公司
• 西安交通大学

Dates

Publication Date

20260508

Application Date

20260121

Claims (6)

1. 1. A lithium air battery, comprising: A battery case (4), the battery case (4) having a positive electrode chamber (401); the compressed air supply assembly is arranged outside the battery shell (4), and comprises a gas storage deformation cavity (1), and the gas storage deformation cavity (1) is communicated with a positive electrode cavity (401) through a pipeline; The gas storage deformation cavity (1) comprises a gas inlet (101) and a gas outlet (102), and the gas outlet (102) is communicated with the positive electrode cavity (401) through a pipeline; The compression air supply assembly comprises an air inlet chamber (2) and an air outlet chamber (3), one side of the air inlet chamber (2) is communicated with the air inlet (101), an air inlet (202) is formed in the other side of the air inlet chamber, one side of the air outlet chamber (3) is communicated with the air outlet (102), the other side of the air outlet chamber is communicated with an air pipeline, and one end, deviating from the air outlet chamber (3), of the air pipeline is communicated with the positive electrode chamber (401); the gas storage deformation cavity (1) comprises a first piezoelectric film deformation plate (103) and a second piezoelectric film deformation plate (104) which are correspondingly arranged; The air inlet chamber (2) comprises an air inlet piezoelectric film deformation plate (201), and the air outlet chamber (3) comprises an air outlet piezoelectric film deformation plate (301); the first piezoelectric film deformation plate (103) and the second piezoelectric film deformation plate (104) deform to change the volume of the gas storage deformation cavity (1); the air inlet piezoelectric film deformation plate (201) is deformed to seal the air inlet (101), and the air outlet piezoelectric film deformation plate (301) is deformed to seal the air outlet (102).
2. 2. The lithium air battery according to claim 1, wherein the inlet piezoelectric film deformation plate (201), the outlet piezoelectric film deformation plate (301), the first piezoelectric film deformation plate (103) and the second piezoelectric film deformation plate (104) are respectively connected with a power supply (5) in a line.
3. 3. The lithium-air battery according to claim 2, characterized in that the battery housing (4) is further provided with a negative electrode chamber (403), and an exchange membrane (402) is arranged between the negative electrode chamber (403) and the positive electrode chamber (401).
4. 4. A battery system comprising a plurality of lithium air batteries according to any one of claims 1-3.
5. 5. The battery system according to claim 4, further comprising a power supply (5) and an ammeter (6), the power supply (5) being wired to the lithium air battery, the ammeter (6), respectively.
6. 6. A method for using a lithium air battery according to claim 1, characterized in that the gas storage deformation cavity (1) is deformed to change its volume so as to introduce gas into the positive electrode cavity (401).

Description

Lithium air battery, battery system and use method Technical Field The invention relates to the technical field of lithium air batteries, in particular to a lithium air battery, a battery system and a use method. Background The lithium air battery is a novel electrochemical energy storage technology, and the technology realizes the direct conversion of chemical energy and electric energy through the oxidation-reduction reaction of lithium metal and oxygen in air, has the outstanding advantages of ultrahigh energy density, environmental friendliness, wide raw material sources, excellent low-temperature performance and the like, and is regarded as an important development direction of a next-generation high-specific-energy battery system. The air compressor is a device for compressing air, the working principle is that an electric motor drives the compressor to do work, a crank shaft of a mobile phone drives a connecting rod to enable a piston to reciprocate, so that the volume of a cylinder is changed, the change of the volume of the cylinder further enables air to enter an air storage tank, and the air with a certain pressure is further discharged and output in a directional mode. The air compressor can provide a stable air source for a series of equipment, and is widely applied to many aspects such as refrigerators, air conditioners, refrigeration compressors, oilfield exploitation, natural gas filling stations, rock drills, pneumatic tools, vehicle brakes, door and window opening and closing, textile machinery, tire inflation, plastic machinery, mining, ships, medicine, sand blasting and paint spraying and the like due to the universal function of the air compressor. The air compressor is mainly a dynamic (speed type or turbine type) compressor and a thermal type compressor. The thermal compressor is a compressor which makes the compressor work through temperature change, and the thermal compressor is limited to further development due to the problems of complex structure, overlarge volume, difficult processing and maintenance, large noise generated in the operation process and the like. The air compressor described above often has a problem in that the internal structure is complicated. Disclosure of Invention In view of the above, the present invention provides a lithium air battery, a battery system and a use method thereof, so as to solve the problem that the existing air compressor often has a complex internal structure. In a first aspect, the present invention provides a lithium air battery, comprising: a battery housing having a positive electrode chamber; the compressed air supply assembly is arranged outside the battery shell and is communicated with the positive electrode cavity pipeline. The gas storage deformation cavity is deformed to change the volume of the gas storage deformation cavity so as to introduce gas into the positive electrode cavity, so that excessive mechanical structures are not needed, and the gas storage deformation cavity has the advantage of simpler internal structure. In an alternative embodiment, the compressed air supply assembly comprises a gas storage deformation cavity, the gas storage deformation cavity comprises an air inlet and an air outlet, and the air outlet is communicated with the positive electrode cavity through a pipeline. In an alternative embodiment, the compressed air supply assembly comprises an air inlet chamber and an air outlet chamber, wherein one side of the air inlet chamber is communicated with the air inlet, the other side of the air inlet chamber is provided with an air inlet, one side of the air outlet chamber is communicated with the air outlet, the other side of the air outlet chamber is communicated with an air pipeline, and one end of the air pipeline, which is away from the air outlet chamber, is communicated with the positive electrode chamber. In an alternative embodiment, the gas storage deformation cavity comprises a first piezoelectric film deformation plate and a second piezoelectric film deformation plate which are correspondingly arranged. In an alternative embodiment, the air inlet chamber comprises an air inlet piezoelectric film deformation plate, and the air outlet chamber comprises an air outlet piezoelectric film deformation plate. In an alternative embodiment, the air inlet piezoelectric film deformation plate, the air outlet piezoelectric film deformation plate, the first piezoelectric film deformation plate and the second piezoelectric film deformation plate are respectively connected with a power supply circuit. In an alternative embodiment, the battery shell is further provided with a negative electrode cavity, and an exchange membrane body is arranged between the negative electrode cavity and the positive electrode cavity. In a second aspect, the invention also provides a battery system comprising the lithium air battery. In an alternative embodiment, the lithium air battery further comprises a power supply and an amm