CN-120184303-B - Liquid flow electric power storage device

Abstract

The invention relates to a liquid flow power storage device, and relates to the technical field of new energy. The liquid flow power storage device comprises a power storage system and a discharging system, wherein the power storage system and the discharging system both comprise a membrane stack, the membrane stack comprises a positive electrode chamber, a proton chamber and a negative electrode chamber which are sequentially arranged and are in fluid communication, and liquid in the mass chamber only transmits protons and does not participate in electrochemical reaction in the power storage system and electrochemical reaction in the discharging system, so that even a small amount of iodine ions can leave the membrane stack along with circulation of the liquid when entering the mass chamber, the iodine ions in the mass chamber cannot migrate to the positive electrode chamber, and membrane damage caused by migration of the iodine ions of the membrane stack cannot be guaranteed, and the service life and efficiency of the membrane stack can be greatly improved.

Inventors

• MU SHICHEN
• MU YIFAN
• HAO XIANG
• NAN SHUO
• SUN LINGTIAN

Assignees

• 山东瑞克环境科技有限公司

Dates

Publication Date

20260508

Application Date

20250319

Claims (9)

1. 1. A liquid flow power storage device is characterized by comprising a power storage system and a discharging system, wherein the number of the power storage system and the discharging system is one or more; Electrochemical reaction is carried out in the electric storage system to convert electric energy into chemical energy, and electrochemical reaction is carried out in the discharging system to convert chemical energy into electric energy; The electric power storage system is connected with the discharging system, products in the electric power storage system are input into the discharging system to serve as input objects of the discharging system, and products in the discharging system are input into the electric power storage system to serve as input objects of the electric power storage system; the electric pile of the electric storage system comprises an anode end plate, a positive plate, a cathode end plate, a positive plate and a negative plate, wherein the space among the anode end plate, the positive plate and the positive plate defines an anode chamber, electrochemical reaction occurring in the anode chamber is oxidation reaction; wherein the concentration of iodide ions in the liquid in the mass chamber of the electrical storage system that permeates the cationic membrane from the cathode chamber is less than 0.05%; The positive electrode plate, the positive electrode plate and the positive electrode film are arranged in a space between the positive electrode plate and the positive electrode film to limit a positive electrode chamber, electrochemical reaction occurring in the positive electrode chamber is oxidation reaction, the space between the positive electrode film and the positive electrode film is arranged in a mass chamber, liquid in the mass chamber does not participate in the electrochemical reaction in the discharge system, the space between the positive electrode film, the negative electrode plate and the negative electrode plate is arranged in a space between the positive electrode film and the negative electrode plate to limit a negative electrode chamber, and electrochemical reaction occurring in the negative electrode chamber is reduction reaction; wherein the concentration of iodate ions and periodate ions in the liquid in the mass chamber of the discharge system, which permeate the cationic membrane from the negative electrode chamber, is less than 0.05%.
2. 2. The liquid flow power storage device according to claim 1, wherein the power storage system and the discharging system further include periodic acid circulation means, phosphoric acid circulation means, hydroiodic acid circulation means, and deiodination means, respectively; the positive electrode chamber of the electric storage system is connected with the periodic acid circulating device of the electric storage system to form a circulating system, so that liquid circulates between the positive electrode chamber and the periodic acid circulating device; The proton chamber of the electric power storage system is connected with the deiodination device of the electric power storage system, the deiodination device of the electric power storage system is connected with the phosphoric acid circulating device of the electric power storage system, the phosphoric acid circulating device of the electric power storage system is also connected with the proton chamber of the electric power storage system, and liquid in the deiodination device of the electric power storage system flows into the phosphoric acid circulating device of the electric power storage system after deiodination and enters the proton chamber of the electric power storage system through the phosphoric acid circulating device of the electric power storage system; The negative electrode chamber of the electric storage system is connected with the hydroiodic acid circulating device of the discharging system, and the negative electrode chamber of the discharging system is connected with the hydroiodic acid circulating device of the electric storage system; the proton chamber of the discharge system is connected with the deiodination device, the deiodination device of the discharge system is connected with the phosphoric acid circulating device of the discharge system, the phosphoric acid circulating device of the discharge system is also connected with the proton chamber of the discharge system, and the liquid in the deiodination device of the discharge system flows into the phosphoric acid circulating device of the discharge system after deiodination and enters the proton chamber of the discharge system through the phosphoric acid circulating device of the discharge system.
3. 3. The liquid flow power storage device according to claim 1, wherein the power storage system and the discharging system further include periodic acid circulation means, hydroiodic acid circulation means, and deiodination ion means, respectively, the power storage system further including phosphoric acid circulation means; The positive electrode chamber of the discharging system is connected with the periodic acid circulating device of the electric storage system, the periodic acid circulating device of the electric storage system is connected with the positive electrode chamber of the electric storage system, the positive electrode chamber of the electric storage system is connected with the periodic acid circulating device of the discharging system, and the periodic acid circulating device of the discharging system is connected with the positive electrode chamber of the electric storage system, so that liquid circulates among the positive electrode chamber of the discharging system, the periodic acid circulating device of the electric storage system, the positive electrode chamber of the electric storage system and the periodic acid circulating device of the discharging system; The proton chamber of the electric power storage system is connected with the deiodination device of the electric power storage system, the deiodination device of the electric power storage system is connected with the phosphoric acid circulating device of the electric power storage system, the phosphoric acid circulating device of the electric power storage system is also connected with the proton chamber of the electric power storage system, and liquid in the deiodination device of the electric power storage system flows into the phosphoric acid circulating device of the electric power storage system after deiodination and enters the proton chamber of the electric power storage system through the phosphoric acid circulating device of the electric power storage system; The negative electrode chamber of the electric storage system is connected with the hydroiodic acid circulating device of the discharging system, and the negative electrode chamber of the discharging system is connected with the hydroiodic acid circulating device of the electric storage system; the proton chamber of the discharge system is connected with the deiodination device, the deiodination device of the discharge system is connected with the phosphoric acid circulating device of the discharge system, the phosphoric acid circulating device of the discharge system is also connected with the proton chamber of the discharge system, and the liquid in the deiodination device of the discharge system flows into the phosphoric acid circulating device of the discharge system after deiodination and enters the proton chamber of the discharge system through the phosphoric acid circulating device of the discharge system.
4. 4. The fluid flow power storage device of claim 1, wherein the power storage system and the discharge system further comprise periodic acid circulation means and hydroiodic acid circulation means, respectively, and wherein the power storage system further comprises phosphoric acid circulation means and deiodination means; The positive electrode chamber of the discharging system is connected with the periodic acid circulating device of the electric storage system, the periodic acid circulating device of the electric storage system is connected with the positive electrode chamber of the electric storage system, the positive electrode chamber of the electric storage system is connected with the periodic acid circulating device of the discharging system, and the periodic acid circulating device of the discharging system is connected with the positive electrode chamber of the electric storage system, so that liquid circulates among the positive electrode chamber of the discharging system, the periodic acid circulating device of the electric storage system, the positive electrode chamber of the electric storage system and the periodic acid circulating device of the discharging system; The proton chambers of the electric storage system and the discharge system are connected with the deiodination device of the electric storage system, the deiodination device of the electric storage system is connected with the phosphoric acid circulation device of the electric storage system, the phosphoric acid circulation device of the electric storage system is also connected with the proton chamber of the electric storage system, and liquid in the deiodination device of the electric storage system flows into the phosphoric acid circulation device of the electric storage system after deiodination and enters the proton chamber of the electric storage system and the proton chamber of the discharge system through the phosphoric acid circulation device of the electric storage system; the negative electrode chamber of the electric storage system is connected with the hydroiodic acid circulating device of the discharging system, and the negative electrode chamber of the discharging system is connected with the hydroiodic acid circulating device of the electric storage system.
5. 5. The liquid flow power storage device according to any one of claims 2 to 4, characterized in that the deiodination device comprises: The inlet of the deiodination circulating tank is connected with the proton chamber; The inlet of the ceramic membrane iodine separating device is connected with the outlet of the deiodination circulating tank, the outlet of the ceramic membrane iodine separating device is connected with the inlet of the phosphoric acid circulating device, the ceramic membrane iodine separating device is used for separating simple substance iodine in liquid and inputting the liquid after solid-liquid separation into the phosphoric acid circulating device, and the ceramic membrane iodine separating device is used for separating the simple substance iodine in the liquid and inputting the solid-liquid separated liquid into the phosphoric acid circulating device, and the ceramic membrane iodine separating device is used for separating the solid-liquid iodine in the liquid after solid-liquid separation into the phosphoric acid circulating device and inputting the solid-liquid into the solid-liquid separating device And the dosing device is connected to a pipeline between the inlet of the ceramic membrane iodine separation device and the outlet of the deiodination circulating tank and is used for adding hydrogen peroxide into the ceramic membrane iodine separation device.
6. 6. The liquid flow power storage device according to claim 5, wherein the periodic acid circulation device includes a periodic acid circulation tank and a periodic acid circulation pump, a liquid outlet of the positive electrode chamber is connected to an inlet of the periodic acid circulation tank, and an outlet of the periodic acid circulation tank is connected to the positive electrode chamber through the periodic acid circulation pump so that a liquid circulates between the positive electrode chamber and the periodic acid circulation device; The phosphoric acid circulating device comprises a phosphoric acid circulating tank and a phosphoric acid circulating pump, an outlet of the deiodination ion device is connected with a liquid inlet of the phosphoric acid circulating tank, a liquid outlet of the phosphoric acid circulating tank is connected with the proton chamber through the phosphoric acid circulating pump, and liquid which does not contain elemental iodine in the phosphoric acid circulating tank is conveyed into the proton chamber through the phosphoric acid circulating pump.
7. 7. The liquid flow power storage device according to claim 6, wherein the phosphoric acid circulation device further comprises a first regulating valve provided on a line in which the phosphoric acid circulation pump is connected to a proton chamber of the power storage system, and an amount of phosphoric acid input into the proton chamber from the phosphoric acid circulation tank can be controlled by the first regulating valve.
8. 8. The liquid flow power storage device according to any one of claims 2 to 4, wherein in the electric film stack of the power storage system, The reaction formula in the positive electrode chamber is IO 3 - -2e+H 2 O=IO 4 - +2H + ; The reaction formula in the negative electrode chamber is I 2 +2e+2H + =2HI; In the electric film stack of the discharge system, The reaction formula in the positive electrode chamber is IO 4 - +2H + +2e=IO 3 - +H 2 O; the reaction formula in the negative electrode chamber is 2 HI-2e=I 2 +2H + .
9. 9. The liquid flow power storage device according to claim 8, wherein a proton chamber separator is provided between the positive electrode membrane and the cation membrane, a plurality of proton chamber separator flow passages are provided in the proton chamber separator, liquid in the proton chamber can flow into the deiodination device through the plurality of proton chamber separator flow passages, respectively, and liquid in the phosphoric acid circulation device can flow into the proton chamber through the proton chamber separator flow passages.

Description

Liquid flow electric power storage device Technical Field The invention relates to the technical field of new energy, in particular to a liquid flow power storage device. Background The electric storage device is widely used in industry and life, such as nickel-hydrogen batteries, lithium ion batteries, all-solid-state lithium ion batteries, fuel cells, lithium air batteries, and the like. The existing various battery technologies have advantages and disadvantages, such as being greatly influenced by the technology and the environmental temperature, being low in efficiency, being safe and the like, and the scrapping disposal of the battery is a social and environmental problem. Aiming at the problems in various battery technologies, a novel iodine battery device has been widely paid attention to the environment friendliness of the novel iodine battery device due to the fact that the novel iodine battery device is high in density, safe, free of temperature influence and capable of being recycled. The iodine battery can be charged by converting electric energy into chemical energy and discharged by converting chemical energy into electric energy, and can solve the problems of the various batteries. However, it has been found in practice that the life of the reactor for carrying out the chemical reaction in such an iodine battery apparatus is far from reaching its expected life, resulting in a serious decrease in productivity and high production cost. Disclosure of Invention The present invention provides a liquid flow power storage device for solving at least one of the above-mentioned problems. The present invention provides a liquid flow electricity storage device comprising: A power storage system and a discharge system, the number of the power storage system and the discharge system being one or more; Electrochemical reaction is carried out in the electric storage system to convert electric energy into chemical energy, and electrochemical reaction is carried out in the discharging system to convert chemical energy into electric energy; The electric power storage system is connected with the discharging system, a product in the electric power storage system is input into the discharging system to be used as an input object of the discharging system, and a product in the discharging system is input into the electric power storage system to be used as an input object of the electric power storage system; The electric power storage system and the discharging system both comprise an electric membrane stack, the electric membrane stack comprises a positive electrode chamber, a proton chamber and a negative electrode chamber which are sequentially arranged and are in fluid communication, and liquid in the proton chamber does not participate in electrochemical reaction in the electric power storage system and electrochemical reaction in the discharging system. In one embodiment, the electrical storage system and the electrical discharge system further comprise periodic acid circulation means, phosphoric acid circulation means, hydroiodic acid circulation means, and deiodination means, respectively; the positive electrode chamber of the electric storage system is connected with the periodic acid circulating device of the electric storage system to form a circulating system, so that liquid circulates between the positive electrode chamber and the periodic acid circulating device; The proton chamber of the electric power storage system is connected with the deiodination device of the electric power storage system, the deiodination device of the electric power storage system is connected with the phosphoric acid circulating device of the electric power storage system, the phosphoric acid circulating device of the electric power storage system is also connected with the proton chamber of the electric power storage system, and liquid in the deiodination device of the electric power storage system flows into the phosphoric acid circulating device of the electric power storage system after deiodination and enters the proton chamber of the electric power storage system through the phosphoric acid circulating device of the electric power storage system; The negative electrode chamber of the electric storage system is connected with the hydroiodic acid circulating device of the discharging system, and the negative electrode chamber of the discharging system is connected with the hydroiodic acid circulating device of the electric storage system; In one embodiment, the proton chamber of the discharge system is connected with the deiodination device, the deiodination device of the discharge system is connected with the phosphoric acid circulating device of the discharge system, the phosphoric acid circulating device of the discharge system is also connected with the proton chamber of the discharge system, and the liquid in the deiodination device of the discharge system flows into the phosphoric acid circulating device of the