CN115764003B - Zinc-silver accumulator used for multiple times under microgravity environment - Google Patents
Zinc-silver accumulator used for multiple times under microgravity environment Download PDFInfo
- Publication number
- CN115764003B CN115764003B CN202211243277.8A CN202211243277A CN115764003B CN 115764003 B CN115764003 B CN 115764003B CN 202211243277 A CN202211243277 A CN 202211243277A CN 115764003 B CN115764003 B CN 115764003B
- Authority
- CN
- China
- Prior art keywords
- negative electrode
- positive
- positive electrode
- negative
- zinc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- BSWGGJHLVUUXTL-UHFFFAOYSA-N silver zinc Chemical compound [Zn].[Ag] BSWGGJHLVUUXTL-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 230000005486 microgravity Effects 0.000 title claims abstract description 15
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 13
- 239000011701 zinc Substances 0.000 claims abstract description 13
- 239000003792 electrolyte Substances 0.000 claims abstract description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 18
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 15
- -1 polytetrafluoroethylene Polymers 0.000 claims description 12
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 10
- 239000011787 zinc oxide Substances 0.000 claims description 9
- 229920002994 synthetic fiber Polymers 0.000 claims description 6
- 239000012209 synthetic fiber Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000004677 Nylon Substances 0.000 claims description 5
- 239000000839 emulsion Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 239000001913 cellulose Substances 0.000 claims description 4
- 229920002678 cellulose Polymers 0.000 claims description 4
- WBFZBNKJVDQAMA-UHFFFAOYSA-D dipotassium;zirconium(4+);pentacarbonate Chemical compound [K+].[K+].[Zr+4].[Zr+4].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O WBFZBNKJVDQAMA-UHFFFAOYSA-D 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 238000003475 lamination Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/28—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/32—Silver accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
Zinc-silver batteries are used for multiple cycles in a microgravity environment and include a housing and a positive electrode, a negative electrode, an electrolyte and a separator within the housing that separates the positive and negative electrodes. The positive and negative current collecting strips extend upwards from the positive and negative electrodes respectively to extend out of the shell and are sleeved with positive and negative electrode insulating sleeves respectively. The upper edges of both the positive electrode and the negative electrode are covered with an insulating film. According to the invention, the upper edges of the positive electrode and the negative electrode of the battery are coated in an insulating way, and the positive electrode collector bar and the negative electrode collector bar are coated by using the insulating sleeve, so that the phenomenon that a zinc bridge is formed by floating up of sponge zinc separated out in the process of charging the battery for many times under a microgravity environment is effectively avoided, and the positive electrode and the negative electrode are communicated to cause the internal short circuit failure of the battery.
Description
Technical Field
The invention relates to a zinc-silver storage battery.
Background
The zinc-silver battery has the advantages of stable discharge voltage, large specific energy, high specific power, safety, reliability and the like, and is generally applied to special applications with high requirements on battery performance. However, the disadvantage of short wet life of conventional zinc-silver batteries limits the field of use and can only be used once under microgravity environmental conditions (microgravity is also called zero gravity, is not generated by gravitational force of the earth, but is caused by factors such as space residual atmosphere, and the like, such as space, and the like). The space station space suit matched battery performance requirement is absolute safe and reliable, and the zinc-silver storage battery is the best choice according to the use environment. But the battery can be reused for a plurality of times under the microgravity environment condition, so that the electricity requirement of a plurality of times of cabin-leaving activities of astronauts is met. If the conventional zinc-silver storage battery is charged in a microgravity environment, sponge zinc can be separated out in the charging process. The separated sponge zinc floats randomly under the microgravity environment, so that a zinc bridge is formed to form a submerged passage, and the short circuit inside the battery is invalid.
Disclosure of Invention
The invention aims to provide a zinc-silver storage battery which can be used for a plurality of times under a microgravity environment.
The zinc-silver secondary battery according to the present invention includes:
a housing;
a positive electrode, a negative electrode, an electrolyte, and a separator within the housing that separates the positive and negative electrodes;
a positive current collecting strip which is led out of the shell from the positive electrode upwards, wherein the part of the positive current collecting strip in the shell is sleeved with a positive electrode insulating sleeve, and the positive electrode insulating sleeve is fixed on the positive current collecting strip in a hot melting mode; and a negative current collector bar led out of the shell from the negative electrode upwards, wherein a part of the negative current collector bar in the shell is sleeved with a negative electrode insulating sleeve, the negative electrode insulating sleeve is fixed on the negative current collector bar in a hot melting mode, the electrolyte contains 40-45% of potassium hydroxide and 3-6% of ZnO, and the upper edges of the positive electrode and the negative electrode are coated by insulating films.
According to the invention, the upper edges of the positive electrode and the negative electrode of the battery are coated in an insulating way, and the positive electrode collector bar and the negative electrode collector bar are coated by using the insulating sleeve, so that the phenomenon that a zinc bridge is formed by floating up of sponge zinc separated out in the process of charging the battery for many times under a microgravity environment is effectively avoided, and the positive electrode and the negative electrode are communicated to cause the internal short circuit failure of the battery.
According to the zinc-silver secondary battery of the present invention, the upper edge of the positive electrode is preferably coated with a nonwoven artificial graft insulating film by about 10mm, and the upper edge of the negative electrode is preferably coated with a reusable cellulose insulating film by about 10 mm.
According to the zinc-silver storage battery, the positive electrode insulating sleeve and the negative electrode insulating sleeve are preferably polytetrafluoroethylene sleeves.
According to the zinc-silver storage battery, the positive current collecting strip can be completely covered by the positive electrode insulating sleeve, and the negative current collecting strip can also be completely covered by the negative electrode insulating sleeve.
According to the zinc-silver storage battery of the present invention, it is preferable that the separator has a height higher than that of the positive electrode and the negative electrode.
According to the zinc-silver storage battery, the negative electrode can be formed by mixing zinc powder with PVA water solution to prepare paste, and then coating the paste on a current collector for pressing. The mixed zinc powder is preferably composed of 70% -80% of zinc oxide and 20% -30% of zinc, and more preferably, inorganic oxide with the mass fraction of 2% -5% is added. According to the invention, through improving the composition of the electrolyte and the negative electrode material composition of the zinc-silver battery, the zinc-silver battery is matched in a synergistic way, so that the zinc precipitation phenomenon in the charging process is effectively inhibited, and the zinc-silver battery is especially suitable for repeated work of the zinc-silver battery in a microgravity environment.
In a word, the zinc-silver storage battery has a simple structure and low cost, and can be used for a plurality of times in a microgravity environment.
Drawings
Fig. 1 is a schematic structural view of a zinc-silver secondary battery according to the present invention.
Detailed Description
The invention is further described below in connection with examples and figures, which should be understood by those skilled in the art that the examples and figures are for the purpose of better understanding of the invention and are not intended to be limiting in any way.
Fig. 1 is a schematic structural view of a zinc-silver secondary battery according to the present invention. As shown in the drawing, the zinc-silver secondary battery of the present invention mainly includes a case 8, a positive electrode 7, a negative electrode 5, an electrolyte 6, a separator 4, a positive collector bar 2, and a negative collector bar 1.
The positive electrode 7, the negative electrode 5 and the electrolyte 6 are located within a housing 8, and a separator 4 separates the positive electrode 7 from the negative electrode 5. The separator 4 is higher in height than the positive electrode 7 and the negative electrode 5.
The positive electrode 7 and the negative electrode 5 may each take the form of a stack of stacked plates. The negative electrode 5 can be formed by mixing zinc powder with PVA water solution to prepare paste, and then coating the paste on a current collector for pressing. The mixed zinc powder consists of 70-80% of zinc oxide and 20-30% of zinc, and preferably corrosion inhibitor with the mass fraction of 2-5% is added. The mass composition of the mixed zinc powder in each example is as follows: 72% zinc oxide, 24.6% zinc and 3.4% corrosion inhibitor. The concentration of PVA water solution is 1% -5%; each example uses a 3% PVA solution in water. The positive electrode 7 is a conventional sintered silver electrode.
The positive collector bar 2 protrudes upward from the positive electrode 7 through the case 8, and the portion of the positive collector bar 2 inside the case 8 is covered with the positive electrode insulating sheath 3. The positive electrode insulating sleeve 3 is a polytetrafluoroethylene sleeve and is fixed on the positive current collecting strip 2 in a hot melting mode. The negative collector bar 1 also protrudes upwards from the negative electrode 5 out of the housing 8, and the part of the negative collector bar 1 in the housing 8 is also sheathed with a negative electrode insulating sleeve, which is likewise made of polytetrafluoroethylene sleeve and is fixed to the negative collector bar 1 in a hot-melt manner. The positive and negative current collector bars can also be completely covered by polytetrafluoroethylene sleeves.
The upper edge of the positive electrode 7 is covered with a nonwoven artificial graft insulating film by about 10mm, and the upper edge of the negative electrode 5 is covered with a reusable cellulose insulating film by about 10 mm.
The diaphragm 4 is formed by adopting non-woven synthetic fiber nylon cloth and carrying out modification treatment: dissolving zirconium potassium carbonate into polytetrafluoroethylene emulsion to form a soaking solution, wherein the mass ratio of the zirconium potassium carbonate to the polytetrafluoroethylene emulsion is 25% -30%; and (3) soaking the nonwoven synthetic fiber Ni Long Bufang in the soaking solution for 4 to 6 hours, taking out, hanging and airing at room temperature. In each example, polytetrafluoroethylene emulsion mixed solution is adopted to soak for 5 hours, and then the mixture is dried. The nonwoven synthetic fiber nylon cloth after the modification treatment may be compounded with a reusable cellulose film, a nonwoven synthetic fiber mat, and/or a polypropylene material to form a composite separator.
The electrolyte 6 consists of potassium hydroxide and ZnO, wherein the mass concentration of the potassium hydroxide is 40-45%, and the mass concentration of the ZnO is 3-6%. The composition of electrolyte 6 in each example was: potassium hydroxide: 43%. ZnO:5%; the balance being water. The electrolyte 6 is filled after the positive and negative electrodes (electrode groups) are housed in the case 8.
The shell 8 is a metal plastic composite packaging shell, and is formed by compression molding after being compounded by nylon and metal aluminum.
As described above, two zinc-silver single batteries of 30Ah and 34Ah were respectively fabricated, and then the batteries of the two examples still worked normally after 10 weeks of charge and discharge in a microgravity (space) environment, and a small amount of precipitated sponge zinc did not have any influence on the positive and negative electrodes.
Claims (1)
1. A zinc-silver battery for multiple cycles of use in a microgravity environment, comprising:
a housing;
the positive electrode, the negative electrode, the electrolyte and the diaphragm which separate the positive electrode from the negative electrode are positioned in the shell, wherein the heights of the diaphragm are higher than those of the positive electrode and the negative electrode, the positive electrode and the negative electrode are in a pole group form formed by lamination, and the diaphragm is formed by modifying non-woven synthetic fiber nylon cloth: dissolving zirconium potassium carbonate into polytetrafluoroethylene emulsion to form a soaking solution, wherein the mass ratio of the zirconium potassium carbonate to the polytetrafluoroethylene emulsion is 25% -30%; placing the non-woven synthetic fiber nylon cloth into the soaking solution to be soaked for 4-6 hours, taking out, hanging and airing at room temperature;
a positive current collecting strip which is led out of the shell from the positive electrode upwards, wherein the part of the positive current collecting strip in the shell is sleeved with a positive electrode insulating sleeve, and the positive electrode insulating sleeve is fixed on the positive current collecting strip in a hot melting mode; and a negative current collecting strip led out of the shell from the negative electrode upwards, wherein the part of the negative current collecting strip in the shell is sleeved with a negative electrode insulating sleeve, the negative electrode insulating sleeve is fixed on the negative current collecting strip in a hot melting mode,
wherein the positive current collector bar is completely covered by the positive electrode insulating sleeve, the negative current collector bar is completely covered by the negative electrode insulating sleeve, the electrolyte contains 40-45% of potassium hydroxide and 3-6% of ZnO, the upper edges of the positive electrode and the negative electrode are covered by insulating films, the upper edge of the positive electrode is covered by a non-woven artificial grafting insulating film for 10mm, the upper edge of the negative electrode is covered by a reusable cellulose insulating film for 10mm,
wherein the negative electrode is formed by mixing mixed zinc powder into PVA water solution to form paste, then coating the paste on a current collector, pressing the paste, the mixed zinc powder consists of 70% -80% of zinc oxide, 20% -30% of zinc and 2% -5% of inorganic oxide, the positive electrode is a sintered silver electrode,
wherein the positive electrode insulating sleeve and the negative electrode insulating sleeve are made of polytetrafluoroethylene sleeves.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211243277.8A CN115764003B (en) | 2022-10-11 | 2022-10-11 | Zinc-silver accumulator used for multiple times under microgravity environment |
| PCT/CN2023/076308 WO2024077830A1 (en) | 2022-10-11 | 2023-02-15 | Zinc-silver storage battery used for multiple times in microgravity environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211243277.8A CN115764003B (en) | 2022-10-11 | 2022-10-11 | Zinc-silver accumulator used for multiple times under microgravity environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115764003A CN115764003A (en) | 2023-03-07 |
| CN115764003B true CN115764003B (en) | 2023-07-21 |
Family
ID=85352095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211243277.8A Active CN115764003B (en) | 2022-10-11 | 2022-10-11 | Zinc-silver accumulator used for multiple times under microgravity environment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115764003B (en) |
| WO (1) | WO2024077830A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009027977A2 (en) * | 2007-08-28 | 2009-03-05 | 3Gsolar Ltd. | Photovoltaic dye cell having an improved counter-electrode |
| CN108711628A (en) * | 2018-05-24 | 2018-10-26 | 武汉孚安特科技有限公司 | The lithium thionyl chloride cell and preparation method thereof of high activity object utilization rate |
| WO2021258924A1 (en) * | 2020-06-23 | 2021-12-30 | 曙鹏科技（深圳）有限公司 | Button-type pouch battery cell and button battery |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100062347A1 (en) * | 2008-09-09 | 2010-03-11 | Lin-Feng Li | Rechargeable zinc cell with longitudinally-folded separator |
| CN101409360A (en) * | 2008-11-25 | 2009-04-15 | 梅岭化工厂 | Silver-zinc battery |
| CN102244303B (en) * | 2011-06-09 | 2014-05-28 | 梅岭化工厂 | Zinc-silver accumulator capable of work at low temperature |
| CN108461690A (en) * | 2017-12-29 | 2018-08-28 | 中国电子科技集团公司第十八研究所 | Zinc-silver oxide cell cellulose hydrate-vinylon fiber composite diaphragm paper, preparation method, application and zinc-silver reserve battery |
| CN113871558A (en) * | 2020-06-30 | 2021-12-31 | 松山湖材料实验室 | Closed metal negative electrode, winding type battery and preparation method |
| CN114284578B (en) * | 2021-12-28 | 2024-08-06 | 贵州梅岭电源有限公司 | Zinc-silver storage battery with long wet service life |
-
2022
- 2022-10-11 CN CN202211243277.8A patent/CN115764003B/en active Active
-
2023
- 2023-02-15 WO PCT/CN2023/076308 patent/WO2024077830A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009027977A2 (en) * | 2007-08-28 | 2009-03-05 | 3Gsolar Ltd. | Photovoltaic dye cell having an improved counter-electrode |
| CN108711628A (en) * | 2018-05-24 | 2018-10-26 | 武汉孚安特科技有限公司 | The lithium thionyl chloride cell and preparation method thereof of high activity object utilization rate |
| WO2021258924A1 (en) * | 2020-06-23 | 2021-12-30 | 曙鹏科技（深圳）有限公司 | Button-type pouch battery cell and button battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115764003A (en) | 2023-03-07 |
| WO2024077830A1 (en) | 2024-04-18 |
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