CN106711518B - A kind of packaging method of positive electrode of sodium-sulfur cell - Google Patents
A kind of packaging method of positive electrode of sodium-sulfur cell Download PDFInfo
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- CN106711518B CN106711518B CN201611191760.0A CN201611191760A CN106711518B CN 106711518 B CN106711518 B CN 106711518B CN 201611191760 A CN201611191760 A CN 201611191760A CN 106711518 B CN106711518 B CN 106711518B
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- 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
- H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
- H01M10/39—Accumulators not provided for in groups H01M10/05-H01M10/34 working at high temperature
- H01M10/3909—Sodium-sulfur cells
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- 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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of packaging methods of positive electrode of sodium-sulfur cell, include the following steps: positive half-cell assembling steps: bottom cover, shell, steel aluminium transition rings, structure bolster and sulfur electrode are assembled into positive half-cell, wherein bottom cover closes the bottom of the shell, and the steel aluminium transition rings connect the top of the shell and the bottom of the structure bolster；Vacuum step: cathode half-cell and the positive half-cell are put into togerther in vacuum welding case, and the vacuum welding case is vacuumized, in vacuum, there are the gaps of vertical direction between the outer step of inner periphery at the top of the structure bolster of the interior step of the positive sealing ring excircle of the cathode half-cell and the positive half-cell；Vacuum welding step: the outer step of inner periphery carries out vacuum laser welding by force-fitting, and along mating surface between the interior step and the outer step at the top of the structure bolster of the interior step of the positive sealing ring excircle of the cathode half-cell and the positive half-cell；Sodium-sulphur battery is taken out by letting out vacuum step.
Description
Technical field
The present invention relates to a kind of packaging methods of positive electrode of sodium-sulfur cell.
Background technique
Sodium-sulphur battery is a kind of respectively using sulphur and metallic sodium as positive and negative electrode active material, with β " made of-aluminium oxide
Electrolyte ceramics pipe is the energy-storage battery of electrolyte membrance.Under 300~330 DEG C of operating temperature, positive sulphur obtains battery
Become sulphion to electronics, negative metal sodium loses electronics and becomes sodium ion, and enters anode by electrolyte ceramics pipe, and just
Pole sulphion combines, and generates sodium polysulfide.As the sulphur of battery anode active material, since itself is non-conductive, need when use
Be soaked in the strong carbon felt of electric conductivity, existing technique be by after sulphur heating melting in being injected into the mold for be placed with carbon felt shape
At prefabricated component, then it is assembled into anode, and encapsulated.
Sodium-sulphur battery is disclosed in 103531855 A application for a patent for invention of Publication No. CN 103500855 A and CN
Anode structure, and the air pressure inside after encapsulation is adjusted by using sodium azide.Since the sodium azide that this method uses has
Severe toxicity, production process is relatively hazardous, in addition, related patents do not provide the specific method of control pressure yet.In Publication No. CN
A kind of sodium-sulphur battery press mounting structure is disclosed in 103123985 A applications for a patent for invention, i.e., product is subjected to interference under vacuum
Cooperation, further takes out and is packaged under atmospheric environment, and this method is excessively high to part processing precision requirement, and this method is difficult to ensure
The reliability and consistency of encapsulation.
Summary of the invention
The purpose of the invention is to overcome the deficiencies of the prior art and provide a kind of packaging method of positive electrode of sodium-sulfur cell,
It can effectively ensure that the consistency of the positive half-cell air pressure inside of sodium-sulphur battery, effectively avoid sodium-sulphur battery at operating temperatures
It is influenced by stress.To guarantee the safety of sodium-sulphur battery, the service life of sodium-sulphur battery is extended.
Realizing a kind of technical solution of above-mentioned purpose is: a kind of packaging method of positive electrode of sodium-sulfur cell, including the following steps:
Positive half-cell assembling steps: the assembling of bottom cover, shell, steel aluminium transition rings, structure bolster and sulfur electrode is positive
Pole half-cell, wherein bottom cover closes the bottom of the shell, and the steel aluminium transition rings connect the top of the shell and described
The bottom of structure bolster；
Vacuum step: cathode half-cell and the positive half-cell are put into togerther in vacuum welding case, and to described
Vacuum welding case vacuumizes, in vacuum, the interior step of the positive sealing ring excircle of the cathode half-cell with it is described
There are the gaps of vertical direction between the outer step of inner periphery at the top of the structure bolster of positive half-cell；
Vacuum welding step: the interior step of the positive sealing ring excircle of the cathode half-cell and the positive half-cell
Structure bolster at the top of inner periphery outer step by force-fitting, and along mating surface between the interior step and the outer step
Carry out vacuum laser welding；
It lets out vacuum step: vacuum is let out to the vacuum welding case, open the chamber door of the vacuum welding case, take out sodium sulphur electricity
Pond.
Further, the positive half-cell assembling steps include:
The bottom of the bottom cover and the shell is welded together by laser welding, the bottom of the shell is sealed
It closes,
The steel aluminium transition rings are welded on to the top of the shell by laser welding；
The sulfur electrode is packed into the shell；
The structure bolster is welded on to the top of the steel aluminium transition rings by laser welding.
Further, the welding fixture in the vacuum step, in the anode half-cell and the vacuum welding case
Lower fixture fix, the cathode half-cell is fixed by the upper fixture in the welding fixture in the vacuum welding case.
Further, when vacuum step is completed, the air pressure in the vacuum welding case is 10Pa.
Further, in the vacuum welding step, the air pressure in the vacuum welding case is kept constant.
Further, in the vacuum welding step, by the adjustable vacuum pumping pump of flow to the vacuum welding case
It is evacuated, and tonifying Qi is carried out to the vacuum welding case to keep the vacuum welding by the adjustable gas front pump of flow
Connect the constant of air pressure in case.
Further, there are two the vacuum weldings of vacuum welding chamber by a tool for the packaging method of the positive electrode of sodium-sulfur cell
Case carries out, two vacuum welding chamber alternately vacuum welding step.
Using a kind of technical solution of the packaging method of positive electrode of sodium-sulfur cell of the invention, including the following steps: anode
Half-cell assembling steps: being assembled into positive half-cell for bottom cover, shell, steel aluminium transition rings, structure bolster and sulfur electrode, wherein
Bottom cover closes the bottom of the shell, and the steel aluminium transition rings connect the top of the shell and the bottom of the structure bolster
Portion；Vacuum step: cathode half-cell and the positive half-cell are put into togerther in vacuum welding case, and to the vacuum welding
Case is connect to vacuumize, in vacuum, the interior step of the positive sealing ring excircle of the cathode half-cell and the anode half
There are the gaps of vertical direction between the outer step of inner periphery at the top of the structure bolster of battery；Vacuum welding step: described negative
Inner periphery is outer at the top of the structure bolster of the interior step of the positive sealing ring excircle of pole half-cell and the positive half-cell
Step carries out vacuum laser welding by force-fitting, and along mating surface between the interior step and the outer step；Let out vacuum step
It is rapid: vacuum being let out to the vacuum welding case, opens the chamber door of the vacuum welding case, takes out sodium-sulphur battery.Its technical effect is that:
It can effectively ensure that the consistency of the positive half-cell air pressure inside of sodium-sulphur battery, effectively avoid sodium-sulphur battery at operating temperatures
It is influenced by stress, to guarantee the safety of sodium-sulphur battery, extends the service life of sodium-sulphur battery.
Detailed description of the invention
Fig. 1 is the structural representation of anode half-cell used in a kind of packaging method of positive electrode of sodium-sulfur cell of the invention
Figure.
Fig. 2 is the structural representation of cathode half-cell used in a kind of packaging method of positive electrode of sodium-sulfur cell of the invention
Figure.
Fig. 3 is the structural schematic diagram of sodium-sulphur battery packaged by a kind of packaging method of positive electrode of sodium-sulfur cell of the invention.
Specific embodiment
Referring to Fig. 1, the present inventor in order to preferably understand technical solution of the present invention, is led to below
Specifically embodiment is crossed, and will be described in detail with reference to the accompanying drawings:
Sodium-sulphur battery includes cathode half-cell 2 and positive half-cell 1, wherein positive half-cell 1 includes bottom cover 11, shell
12, sulfur electrode 13, steel aluminium transition rings 14, structure bolster 15.Shell 12 is made of 304 stainless steels.
A kind of packaging method of positive electrode of sodium-sulfur cell of the invention, including the following steps:
Positive half-cell assembling steps: first passing through laser welding and weld together bottom cover 11 and the bottom of shell 12, will
It closes the bottom of shell 12.The top of the bottom of steel aluminium transition rings 14 and shell 12 is welded together by laser welding.To
In shell 12 be packed into sulfur electrode 13, contact the bottom surface of sulfur electrode 13 and the top surface of bottom cover 11, the outer circumference surface of sulfur electrode 13 and
The inner peripheral surface of shell 12 contacts.The bottom of structure bolster 15 and the top of steel aluminium transition rings 14 are welded by laser welding
Together, positive half-cell 1 is formed.
Positive half-cell welding step carries out in air.
Vacuum step: cathode half-cell 2 and positive half-cell 1 are put into togerther in vacuum welding case, and to described true
Missing solder connects case and vacuumizes.In the vacuum welding case, cathode half-cell 2 and the upper fixture of welding fixture are fixed, the upper fixture
Clamp the negative lug 21 of cathode half-cell 2.The lower fixture of positive half-cell 1 and welding fixture is fixed.In vacuum,
The upper fixture delays the interior step 221 of the excircle of the positive sealing ring 22 of cathode half-cell 2 and the structure of positive half-cell 1
There are the gap of vertical direction between the outer step 151 of 15 top inner periphery of stamping, guarantee that positive half-cell 1 thoroughly vacuumizes.
When air pressure in the vacuum welding case reaches 10Pa or less, stop vacuumizing.
Vacuum welding step: cathode half-cell 2 declines, the interior platform of the excircle of the positive sealing ring 22 of cathode half-cell 2
The outer step 151 of the 15 top inner periphery of structure bolster of rank 221 and positive half-cell 1 is by force-fitting, along interior 221 He of step
The excircle of mating surface carries out vacuum laser welding between outer step 151, to complete the sealing-in to positive electrode of sodium-sulfur cell.
In vacuum welding step, pumping and tonifying Qi to be carried out simultaneously to the vacuum welding case, pumping passes through vacuum pumping pump
It carries out, tonifying Qi is carried out by gas front pump, is designed with flow control valve on the vacuum pumping pump and the gas front pump, is adjusted
The flow control valve is saved to guarantee the constant of air pressure in the vacuum welding case.After vacuum welding, the vacuum pumping pump
It is automatically closed with the gas front pump.
It lets out vacuum step: vacuum is let out to the vacuum welding case, open the chamber door of the vacuum welding case, take out sodium sulphur electricity
Pond.
A kind of packaging method of positive electrode of sodium-sulfur cell of the invention can effectively ensure that inside the positive half-cell 1 of sodium-sulphur battery
The consistency of air pressure, meanwhile, vacuum welding case described in the size and vacuum welding step by adjusting structure bolster 15
Interior air pressure, can effectively avoid sodium-sulphur battery is influenced by stress at operating temperatures.
A kind of packaging method of positive electrode of sodium-sulfur cell of the invention is by the way that positive half-cell 1 and cathode half-cell 2 to be put into
It is vacuumized in vacuum welding case, when setting value is down in the air pressure in the vacuum welding case, by positive half-cell 1 and is born
Pole half-cell 2 cooperates, and carries out laser welding in the vacuum welding case.In order to improve welding efficiency, the vacuum welding
Case is divided into Liang Ge vacuum welding chamber, and the laser welding in two vacuum welding chamber is alternately.Present invention can ensure that sodium
The safety of sulphur battery and the consistency of internal pressure, to extend the service life of battery.
Meanwhile a kind of packaging method of positive electrode of sodium-sulfur cell of the invention passes through vacuum described in control vacuum welding step
Air pressure inside welding case is strictly precisely controlled the air pressure inside of sodium-sulphur battery, i.e., at operating temperatures, anode is partly for guarantee battery
Air pressure in battery 1 is slightly above the air pressure in cathode half-cell 2, and the air pressure in positive half-cell 1 and cathode half-cell 2 is
Negative pressure can be further ensured that the consistency of sodium-sulphur battery and the service life of battery.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as the change in spirit of the invention, to embodiment described above
Change, modification will all be fallen within the scope of claims of the present invention.
Claims (7)
1. a kind of packaging method of positive electrode of sodium-sulfur cell, including the following steps:
Positive half-cell assembling steps: bottom cover, shell, steel aluminium transition rings, structure bolster and sulfur electrode are assembled into anode half
Battery, wherein bottom cover closes the bottom of the shell, the steel aluminium transition rings connect the shell top and the structure
The bottom of bolster；
Vacuum step: cathode half-cell and the positive half-cell are put into togerther in vacuum welding case, and to the vacuum
Welding case vacuumizes, in vacuum, the interior step of the positive sealing ring excircle on the cathode half-cell and institute
State at the top of the structure bolster of positive half-cell that there are the gaps of vertical direction between the outer step of inner periphery；
Vacuum welding step: half electricity of the interior step of the positive sealing ring excircle on the cathode half-cell and the anode
The outer step of inner periphery cooperates by force-fitting, and along between the interior step and the outer step at the top of the structure bolster in pond
Face carries out vacuum laser welding；
It lets out vacuum step: vacuum is let out to the vacuum welding case, open the chamber door of the vacuum welding case, take out sodium-sulphur battery.
2. a kind of packaging method of positive electrode of sodium-sulfur cell according to claim 1, it is characterised in that: the anode half-cell
Assembling steps include:
The bottom of the bottom cover and the shell is welded together by laser welding, the bottom of the shell is closed,
The steel aluminium transition rings are welded on to the top of the shell by laser welding；
The sulfur electrode is packed into the shell；
The structure bolster is welded on to the top of the steel aluminium transition rings by laser welding.
3. a kind of packaging method of positive electrode of sodium-sulfur cell according to claim 1, it is characterised in that: the vacuum step
In, the lower fixture of the anode half-cell and the welding fixture in the vacuum welding case is fixed, and the cathode half-cell is by institute
The upper fixture stated in the welding fixture in vacuum welding case is fixed.
4. a kind of packaging method of positive electrode of sodium-sulfur cell according to claim 1, it is characterised in that: vacuum step is completed
When, the air pressure in the vacuum welding case is 10Pa.
5. a kind of packaging method of positive electrode of sodium-sulfur cell according to claim 1, it is characterised in that: the vacuum welding step
In rapid, the air pressure in the vacuum welding case is kept constant.
6. a kind of packaging method of positive electrode of sodium-sulfur cell according to claim 5, it is characterised in that: the vacuum welding step
In rapid, the vacuum welding case is evacuated by flow adjustable vacuum pumping pump, and defeated by the adjustable gas of flow
Enter pump and tonifying Qi is carried out to the vacuum welding case to keep the constant of air pressure in the vacuum welding case.
7. a kind of packaging method of positive electrode of sodium-sulfur cell according to claim 1, it is characterised in that: this method passes through one
There are two the vacuum welding casees of vacuum welding chamber to carry out for tool, two vacuum welding chamber alternately vacuum welding step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611191760.0A CN106711518B (en) | 2016-12-21 | 2016-12-21 | A kind of packaging method of positive electrode of sodium-sulfur cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611191760.0A CN106711518B (en) | 2016-12-21 | 2016-12-21 | A kind of packaging method of positive electrode of sodium-sulfur cell |
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| Publication Number | Publication Date |
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| CN106711518A CN106711518A (en) | 2017-05-24 |
| CN106711518B true CN106711518B (en) | 2019-03-19 |
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| CN201611191760.0A Active CN106711518B (en) | 2016-12-21 | 2016-12-21 | A kind of packaging method of positive electrode of sodium-sulfur cell |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10223256A (en) * | 1997-02-10 | 1998-08-21 | Hitachi Ltd | Sodium-sulfur battery |
| JP2000251929A (en) * | 1999-02-25 | 2000-09-14 | Yuasa Corp | Negative electrode compartment structural body for sodium-sulfur battery and its manufacture |
| CN103123983A (en) * | 2012-12-12 | 2013-05-29 | 上海电气钠硫储能技术有限公司 | High-vacuum packaging method of sodium-sulfur battery |
| CN103500856A (en) * | 2013-10-17 | 2014-01-08 | 上海电气钠硫储能技术有限公司 | Sodium-sulfur cell |
| CN103531855A (en) * | 2013-10-17 | 2014-01-22 | 上海电气钠硫储能技术有限公司 | Anode sealing structure of sodium-sulfur cell |
| CN106093585A (en) * | 2016-08-17 | 2016-11-09 | 上海电气钠硫储能技术有限公司 | A kind of sodium-sulphur battery solid electrolyte tube sodium ion method of measuring resistivity |
-
2016
- 2016-12-21 CN CN201611191760.0A patent/CN106711518B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10223256A (en) * | 1997-02-10 | 1998-08-21 | Hitachi Ltd | Sodium-sulfur battery |
| JP2000251929A (en) * | 1999-02-25 | 2000-09-14 | Yuasa Corp | Negative electrode compartment structural body for sodium-sulfur battery and its manufacture |
| CN103123983A (en) * | 2012-12-12 | 2013-05-29 | 上海电气钠硫储能技术有限公司 | High-vacuum packaging method of sodium-sulfur battery |
| CN103500856A (en) * | 2013-10-17 | 2014-01-08 | 上海电气钠硫储能技术有限公司 | Sodium-sulfur cell |
| CN103531855A (en) * | 2013-10-17 | 2014-01-22 | 上海电气钠硫储能技术有限公司 | Anode sealing structure of sodium-sulfur cell |
| CN106093585A (en) * | 2016-08-17 | 2016-11-09 | 上海电气钠硫储能技术有限公司 | A kind of sodium-sulphur battery solid electrolyte tube sodium ion method of measuring resistivity |
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| Publication number | Publication date |
|---|---|
| CN106711518A (en) | 2017-05-24 |
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Effective date of registration: 20200909 Address after: Room 1201, no.1346 Gonghe Xin Road, Jing'an District, Shanghai 200070 Patentee after: Shanghai Electric Enterprise Development Co., Ltd Address before: 201815 Shanghai Jiading District City Jia Zhu Road No. 1997 Patentee before: SHANGHAI ELECTRIC SODIUM SULFUR ENERGY STORAGE TECHNOLOGY Co.,Ltd. |