CN115708242A - Method for reducing internal air pressure of hermetically stored zinc-silver storage battery - Google Patents
Method for reducing internal air pressure of hermetically stored zinc-silver storage battery Download PDFInfo
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- CN115708242A CN115708242A CN202211501951.8A CN202211501951A CN115708242A CN 115708242 A CN115708242 A CN 115708242A CN 202211501951 A CN202211501951 A CN 202211501951A CN 115708242 A CN115708242 A CN 115708242A
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- China
- Prior art keywords
- zinc
- storage battery
- silver
- silver storage
- reducing
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Links
- BSWGGJHLVUUXTL-UHFFFAOYSA-N silver zinc Chemical compound [Zn].[Ag] BSWGGJHLVUUXTL-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000003792 electrolyte Substances 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 230000001133 acceleration Effects 0.000 claims abstract description 5
- 238000005086 pumping Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 abstract description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- 239000001257 hydrogen Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000000178 monomer Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229910001923 silver oxide Inorganic materials 0.000 description 2
- 238000012369 In process control Methods 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000006182 cathode active material Substances 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010965 in-process control Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
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- Hybrid Cells (AREA)
Abstract
The invention belongs to the technical field of zinc-silver batteries, and particularly relates to a method for reducing the internal pressure of a hermetically stored zinc-silver storage battery, which comprises the steps of filling electrolyte into the zinc-silver storage battery, soaking the zinc-silver storage battery in the electrolyte, placing the zinc-silver storage battery in a centrifugal device, rotating the zinc-silver storage battery for 1min to 3min under the condition of keeping the acceleration of 0.5g to 10g, connecting a liquid injection port of a single battery with an air extractor, vacuumizing the interior of the zinc-silver storage battery by using the air extractor, sealing the zinc-silver storage battery within 5min after vacuumizing, and storing the zinc-silver storage battery at a low temperature.
Description
Technical Field
The invention belongs to the technical field of zinc-silver batteries, and particularly relates to a method for reducing the internal air pressure of a hermetically stored zinc-silver storage battery.
Background
The zinc-silver storage battery has high safety and high reliability, and is widely applied to aerospace vehicles. The long-wet-charged-life zinc-silver storage battery can meet the long-term standby use requirement of aircraft equipment.
Because the cathode active material of the zinc-silver storage battery is a zinc simple substance, the corrosion and hydrogen evolution are easy to occur in the alkaline solution. In general engineering, corrosion and hydrogen evolution are inhibited by adding a corrosion inhibitor into a zinc cathode, and the hydrogen evolution rate is reduced. However, due to the difference in process control of electrode manufacturing, hydrogen evolution occurs in the initial stage of electrolyte filling of the zinc-silver storage battery, and a large amount of hydrogen can be accumulated in the battery in a short time if the battery is directly sealed without placing and pumping; meanwhile, under the high-temperature condition, the activity of the zinc cathode is increased, so that corrosion and hydrogen evolution are easier to occur, and meanwhile, the silver oxide anode is easy to decompose to generate oxygen, so that the stability of the internal pressure of the battery in the long-term sealed charged storage process is not facilitated.
Disclosure of Invention
The invention provides a method for reducing the internal air pressure of a hermetically stored zinc-silver storage battery aiming at the defects of the prior art.
The method is realized by the following technical scheme:
a method for reducing the internal pressure of the sealed and stored zinc-silver storage battery includes such steps as putting the zinc-silver storage battery in a centrifugal unit, gas-liquid separation by the centrifugal unit, exhausting the gas generated by electric storage, removing the gas exhausting unit, sealing and low-temp storage.
A method for reducing the internal air pressure of a sealed and stored zinc-silver storage battery comprises the steps of injecting electrolyte into the zinc-silver storage battery, soaking, rotating for 1-3 min under the condition that a centrifugal device keeps acceleration of 0.5-10 g, connecting a liquid injection port of a single battery with an air exhaust device, vacuumizing the interior of the zinc-silver storage battery by using the air exhaust device, sealing the zinc-silver storage battery within 5min after vacuumizing is finished, and storing at low temperature.
The soaking time of the electrolyte is 4-12 h.
The times of vacuumizing are 8-10 times, and the vacuumizing is carried out each time until the vacuum degree is-40 kPa to-20 kPa, and the vacuumizing is kept for 2 s-3 s.
The interval time of the vacuum pumping is 10-12 h.
The low-temperature storage temperature is-55 ℃ to 5 ℃.
The sealing is realized by taking down the air extractor after each vacuumizing, installing a check valve type air plug at the liquid injection port for sealing, and taking down the check valve type air plug during the vacuumizing.
Has the advantages that:
the invention realizes gas-liquid separation by the centrifugal device at the initial stage of filling the electrolyte into the battery, and then adopts vacuum pumping and exhaust to reduce the internal air pressure, and simultaneously combines low-temperature storage to reduce the electrode activity and inhibit the cathode corrosion and the anode decomposition, thereby reducing the internal pressure of the battery and improving the internal pressure stability of the battery in long-term storage.
The method carries out multiple vacuum pumping operations, and on one hand, can ensure that the gases generated by the corrosion hydrogen evolution and the silver oxide anode decomposition at the initial filling stage of the electrolyte are thoroughly removed; on the other hand, the combination of low-temperature storage can passivate hydrogen evolution and decomposition reaction, thereby reducing the total amount of gas generated in the battery.
Detailed Description
The following description will explain the embodiments of the present invention in further detail, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments are still within the scope of the present invention as claimed in the claims.
Example 1
The method comprises the steps of (1) filling electrolyte into a 40Ah zinc-silver storage battery, soaking for 12h, placing the zinc-silver storage battery in a centrifugal device, rotating for 3min under the condition that the acceleration is 3g, connecting a liquid filling port of a monomer zinc-silver storage battery with an air extractor, vacuumizing the interior of the zinc-silver storage battery by using a sealed air extractor, keeping the vacuum degree at-40 kPa, and keeping the vacuum degree for 3s; carrying out vacuum pumping operation once every 12h for 10 times; taking down the air extractor after each vacuumizing, installing a one-way valve type air plug at the liquid injection port for sealing, and taking down the air plug during vacuumizing; after the vacuumizing operation is finished, the zinc-silver storage battery is sealed within 2min, is placed in an environment at 0 ℃ for storage, and is sealed and stored for 12 months, and the internal peak pressure is maintained at 0.03 MPa-0.05 MPa.
Example 2
Adding electrolyte into 4 30Ah zinc-silver storage batteries (1 #, 2#, 3#, 4 #) for soaking for 8h, then placing the zinc-silver storage batteries in a centrifugal device, rotating for 2min under the condition that the acceleration is 5g, then connecting a liquid injection port of a monomer zinc-silver storage battery with an air extraction device, vacuumizing the interior of the zinc-silver storage battery by using a sealed air extraction device, and keeping the vacuum degree at-30 kPa for 3s; carrying out vacuum pumping operation once every 12 h;
wherein the 1# monomer is pumped out for 2 times, the 2# monomer is pumped out for 4 times, the 3# monomer is pumped out for 6 times, and the 4# monomer is pumped out for 8 times; taking down the air extractor after each vacuumizing, installing a one-way valve type air plug at the liquid injection port for sealing, and taking down the air plug during vacuumizing; and after each single battery finishes vacuumizing operation, sealing the zinc-silver storage battery within 3min, storing the zinc-silver storage battery in an environment at 0 ℃, and installing a barometer to observe the internal pressure condition of each single battery. The specific test results are shown in table 1 below.
TABLE 1 variation of internal pressure of unit cell with exhaust time and standing time (unit/MPa)
| 1d | 2d | 3d | 4d | 5d | 6d | 7d | 8d | |
| 1# | 0.014 | 0.02 | 0.025 | 0.029 | 0.032 | 0.033 | 0.034 | 0.034 |
| 2# | - | 0.013 | 0.017 | 0.02 | 0.021 | 0.021 | 0.022 | 0.022 |
| 3# | - | - | 0.012 | 0.014 | 0.017 | 0.017 | 0.018 | 0.018 |
| 4# | - | - | - | 0.01 | 0.012 | 0.013 | 0.013 | 0.013 |
The comparative analysis of the examples shows that the gas is deposited at the fastest speed in the early stage of exhaust, and the internal pressure can be reduced by 161.5% by implementing the method (4 #).
Claims (7)
1. A method for reducing the internal air pressure of a sealed and stored zinc-silver storage battery is characterized in that the zinc-silver storage battery is placed in a centrifugal device, gas-liquid separation is realized by using the centrifugal device, then gas precipitated at the initial stage of charged storage is discharged at an accelerated speed by using a negative pressure environment formed by an air exhaust device, the air exhaust device is taken down after air exhaust is finished, and the battery is sealed and stored at a low temperature.
2. The method for reducing the internal air pressure of a hermetically stored zinc-silver storage battery according to claim 1, wherein after the zinc-silver storage battery is soaked in the electrolyte, the zinc-silver storage battery is rotated for 1min to 3min under the condition that the centrifugal device keeps the acceleration of the zinc-silver storage battery between 0.5g and 10g, the liquid injection port of the single battery is connected with an air extractor, the inside of the zinc-silver storage battery is vacuumized by the air extractor, and after the vacuumization is finished, the zinc-silver storage battery is sealed within 5min and stored at a low temperature.
3. The method for reducing the internal gas pressure of a hermetically stored zinc-silver secondary battery according to claim 2, wherein the electrolyte is soaked for a period of time ranging from 4 hours to 12 hours.
4. The method for reducing the internal gas pressure of a hermetically stored zinc-silver secondary battery according to claim 2, wherein the number of times of the evacuation is 8 to 10 times, and the evacuation is performed each time until the degree of vacuum is-40 kPa to-20 kPa, and the holding time is 2 to 3 seconds.
5. The method for reducing the internal gas pressure of a hermetically stored zinc-silver secondary battery according to claim 2, wherein the evacuation is performed for a period of 10 to 12 hours.
6. A method of reducing the internal gas pressure of a hermetically stored zinc-silver accumulator as claimed in claim 2 in which the cryogenic storage temperature is from-55 ℃ to 5 ℃.
7. The method for reducing the internal gas pressure of a hermetically stored zinc-silver storage battery according to claim 2, wherein the sealing is performed by installing a check valve type gas plug after each vacuum pumping, and removing the check valve type gas plug after the vacuum pumping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211501951.8A CN115708242A (en) | 2022-11-28 | 2022-11-28 | Method for reducing internal air pressure of hermetically stored zinc-silver storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211501951.8A CN115708242A (en) | 2022-11-28 | 2022-11-28 | Method for reducing internal air pressure of hermetically stored zinc-silver storage battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115708242A true CN115708242A (en) | 2023-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211501951.8A Pending CN115708242A (en) | 2022-11-28 | 2022-11-28 | Method for reducing internal air pressure of hermetically stored zinc-silver storage battery |
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|---|---|
| CN (1) | CN115708242A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103086093A (en) * | 2013-01-21 | 2013-05-08 | 中国人民解放军第二炮兵装备研究院第三研究所 | Method for prolonging zinc-silver reserve cell storage life |
| CN104518196A (en) * | 2013-09-27 | 2015-04-15 | 上海空间电源研究所 | Vacuum automatic charging system of silver-zinc secondary battery electrolyte and method thereof |
| CN204577512U (en) * | 2015-04-30 | 2015-08-19 | 河南新太行电源有限公司 | A kind of zinc-silver reserve battery negative pressure ventilation reservoir |
| CN110854446A (en) * | 2019-11-19 | 2020-02-28 | 惠州锂威新能源科技有限公司 | Secondary packaging device and secondary packaging method for lithium ion battery |
| CN216213975U (en) * | 2021-10-22 | 2022-04-05 | 贵州梅岭电源有限公司 | Zinc-silver storage battery vacuum filling device |
-
2022
- 2022-11-28 CN CN202211501951.8A patent/CN115708242A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103086093A (en) * | 2013-01-21 | 2013-05-08 | 中国人民解放军第二炮兵装备研究院第三研究所 | Method for prolonging zinc-silver reserve cell storage life |
| CN104518196A (en) * | 2013-09-27 | 2015-04-15 | 上海空间电源研究所 | Vacuum automatic charging system of silver-zinc secondary battery electrolyte and method thereof |
| CN204577512U (en) * | 2015-04-30 | 2015-08-19 | 河南新太行电源有限公司 | A kind of zinc-silver reserve battery negative pressure ventilation reservoir |
| CN110854446A (en) * | 2019-11-19 | 2020-02-28 | 惠州锂威新能源科技有限公司 | Secondary packaging device and secondary packaging method for lithium ion battery |
| CN216213975U (en) * | 2021-10-22 | 2022-04-05 | 贵州梅岭电源有限公司 | Zinc-silver storage battery vacuum filling device |
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Application publication date: 20230221 |