CN113611964A - Steel gasket, lithium ion battery and sealed container with sealing function - Google Patents
Steel gasket, lithium ion battery and sealed container with sealing function Download PDFInfo
- Publication number
- CN113611964A CN113611964A CN202110798888.8A CN202110798888A CN113611964A CN 113611964 A CN113611964 A CN 113611964A CN 202110798888 A CN202110798888 A CN 202110798888A CN 113611964 A CN113611964 A CN 113611964A
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- China
- Prior art keywords
- sealing
- gasket
- steel gasket
- sealing function
- battery
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- 238000007789 sealing Methods 0.000 title claims abstract description 88
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 30
- 239000010959 steel Substances 0.000 title claims abstract description 30
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 14
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 14
- 239000010935 stainless steel Substances 0.000 claims abstract description 14
- 229920001971 elastomer Polymers 0.000 claims abstract description 8
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 7
- 239000013013 elastic material Substances 0.000 claims abstract description 4
- 239000011257 shell material Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 8
- 239000010410 layer Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 239000004033 plastic Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002345 surface coating layer Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/191—Inorganic material
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/193—Organic material
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/197—Sealing members characterised by the material having a layered structure
-
- 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)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a steel gasket with a sealing function, a lithium ion battery and a sealing container, which are characterized by comprising a gasket made of stainless steel; and the outer wall of the stainless steel gasket is wrapped with a sealing layer made of an elastic material. The thickness of the sealing layer ranges from 0.4mm to 0.6 mm. The sealing layer is made of ethylene propylene diene monomer or fluorinated rubber. By adopting the technical scheme, the invention can be used in combination with a conventional compression sealing structure, the second sealing is realized on the basis of compression sealing, and the sealing reliability is greatly improved. Meanwhile, under the condition of lower requirements, the sealing structure can be sealed only by adopting the gasket in riveting.
Description
Technical Field
The invention belongs to the technical field of battery sealing, and particularly relates to a steel gasket with a sealing function, a lithium ion battery and a sealing container.
Background
Sealing is a common requirement, and has many applications in engineering, for example, a housing of a lithium ion battery generally needs to meet a high sealing requirement to prevent moisture in air from entering the inside of the battery, which affects the performance of the lithium ion battery, and at the same time, current inside the battery needs to be led out of the battery. The common methods for realizing electric connection and sealing are that a compressible rubber or plastic structural part is specially designed, the compressible rubber or plastic structural part is placed into an interface to be sealed, and the plastic structural part is deformed to a certain extent by extrusion and other methods, so that the purpose of sealing is realized.
The steel gasket is a common part, and is required to be adopted in mechanical connection modes such as screw connection, riveting and the like. In the screw connection, the steel gasket can provide certain pretightning force, prevents that the screw from loosening in the use. In the riveting process, the steel gasket can provide a larger stress area, so that the riveting is more stable.
Riveting is a common mode for sealing a lithium ion battery cathode column and a battery shell, compression sealing can be realized under the structure, and battery leakage can be caused once sealing failure occurs, so that the application requirement in the high-reliability field cannot be met.
Disclosure of Invention
The invention aims to provide a steel gasket with a sealing function, a lithium ion battery and a sealing container, which can be used together with a conventional compression sealing structure, realize the second sealing on the basis of compression sealing and greatly improve the reliability of sealing. Meanwhile, under the condition of lower requirements, the sealing structure can be sealed only by adopting the gasket in riveting.
In order to achieve the above object, a first object of the present invention is to provide a steel gasket having a sealing function, comprising a gasket (1) made of stainless steel; the outer wall of the stainless steel gasket (1) is wrapped with a sealing layer made of elastic materials.
Preferably: the thickness of the sealing layer ranges from 0.4mm to 0.6 mm.
Preferably: the thickness of the sealing layer was 0.5 mm.
Preferably: the sealing layer is made of ethylene propylene diene monomer.
Preferably: the sealing layer is made of fluorinated rubber.
The second purpose of the invention is to provide a lithium ion battery, wherein a through hole for connecting a pole post (5) is arranged on a battery upper cover (4), and a compression sealing gasket (6) is arranged between the battery upper cover (4) and the pole post (5); and the upper surface of the compression sealing gasket (6) is provided with a steel gasket (3) with a sealing function.
The third purpose of the invention is to provide a sealed container, the material of the shell of the sealed container is different from that of the supporting framework, a through hole for connecting a rivet (9) is arranged on the shell (7), the supporting framework is positioned right below the through hole, and a steel gasket (3) with a sealing function is arranged at the upper opening of the through hole.
Compared with the prior art, the invention has the beneficial effects that:
1. the gasket integrates the functions of supporting and sealing, so that two sealing can be realized without changing the original sealing structure, and structural sealing can be directly realized at places with lower requirements.
2. The steel gasket material in the invention comprises metal or nonmetal materials with certain strength and toughness, such as stainless steel, iron and the like.
3. The material of the surface coating layer of the steel gasket comprises rubber, plastic and other materials with certain plastic deformation capacity.
4. The gasket of the present invention includes various shapes such as a circle, a square, an irregular shape, etc.
Drawings
FIG. 1 is a block diagram of a first preferred embodiment of the present invention;
FIG. 2 is a block diagram of a second preferred embodiment of the present invention;
FIG. 3 is a block diagram of a third preferred embodiment of the present invention;
in the figure: 1. a gasket; 2. a sealing layer; 3. a steel gasket; 4. an upper cover of the battery; 5. a pole column; 6. compressing the gasket; 7. a housing; 8. a support framework; 9. and connecting rivets.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution:
a steel gasket with sealing function comprises a gasket 1 made of stainless steel; and the outer wall of the stainless steel gasket 1 is wrapped with a sealing layer 2 made of an elastic material.
The thickness of the sealing layer ranges from 0.4mm to 0.6 mm.
In the preferred embodiment: the thickness of the sealing layer was 0.5 mm.
The sealing layer is made of ethylene propylene diene monomer.
The working principle is as follows: the surface of the stainless steel gasket is coated with a layer of ethylene propylene diene monomer rubber with the thickness of 0.5mm by adopting a die method to replace a common stainless steel gasket at the pole of a certain type of lithium ion battery, the pole extrudes the gasket in the riveting and assembling process, so that the ethylene propylene diene monomer rubber on the surface of the steel gasket deforms and fills all gaps between the poles and the gasket, and gaps between the gasket and the poles and between the gasket and a sealing gasket are filled while the poles are effectively supported, thereby realizing sealing. And the compression sealing structure between the pole and the upper cover is matched, so that the double-channel sealing structure of the battery is realized, and the risk of battery leakage is effectively reduced.
Referring to fig. 2, in the lithium ion battery, a through hole for connecting a pole 5 is formed on a battery upper cover 4, and a compression sealing gasket 6 is arranged between the battery upper cover 4 and the pole 5; the upper surface of the compression sealing gasket 6 is provided with a steel gasket 3 with a sealing function.
The working principle is as follows: the surface of the stainless steel gasket is coated with a layer of fluorinated rubber with the thickness of 0.5mm by adopting a die method to replace a common stainless steel gasket at the pole of a certain type of lithium ion battery, the pole extrudes the gasket in the riveting and assembling process, so that the fluorinated rubber on the surface of the steel gasket deforms, and all gaps between the pole and the gasket are filled, therefore, gaps between the gasket and the pole, and gaps between the gasket and a compressed sealing gasket are filled while the pole is effectively supported, and sealing is realized. And the compression sealing structure between the pole and the upper cover is matched, so that the double-channel sealing structure of the battery is realized, and the risk of battery leakage is effectively reduced.
Referring to fig. 3, a material of a shell of the sealed container is different from that of a supporting framework, a through hole for connecting a rivet 9 is formed in the shell 7, the supporting framework 8 is located right below the through hole, and a steel gasket 3 having a sealing function is arranged at an upper opening of the through hole.
The working principle is as follows: aiming at some sealed containers with thin shell structures, the shell material and the supporting framework of the container are different materials, for example, the shell is made of Al, the framework is made of steel and is not suitable for being connected in a welding mode, the shell and the supporting framework are connected by adopting the structure shown in figure 3 through rivets, a sealing steel gasket is added between the rivets and the shell, the sealing steel gasket is pressed in the riveting process to cause the ethylene propylene diene monomer rubber on the surface layer to deform, and gaps between the rivets and the shell are filled, so that the sealing purpose is achieved.
Comparative example 1
And only adopting the compression sealing gasket to carry out sealing treatment on the upper cover and the pole of the battery.
The test method comprises the following steps:
1. tightness test
Corroding the compression sealing gasket for 24 hours from the bottom of the battery cover by adopting a corrosive organic solvent at 60 ℃ to ensure that the compression sealing gasket is out of work, and then detecting the sealing effect of different sealing modes by adopting a direct-pressure leakage detection method.
It was found by direct pressure leak detection that the cell employing one sealing process in comparative example 1 had an increased leak rate of 1X 10 after the compressive seal was corroded-2Pa·m3Above s, the use requirement of the battery can not be met, and although the compression sealing gasket of the battery shells in the examples 1 and 2 is corroded and damaged, the leakage rate of the battery is still less than 1 x 10 because a stainless steel sealing gasket is arranged between the pole and the shell-8Pa·m3And/s, the use requirement of the lithium ion battery is met.
The experiment shows that the design of the sealing steel gasket can ensure that the battery can still keep sealed under the condition that the compression sealing gasket fails, no leakage occurs, and the reliability of the battery is greatly improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A steel gasket with sealing function, characterized by comprising a gasket (1) made of stainless steel; the outer wall of the stainless steel gasket (1) is wrapped with a sealing layer made of elastic materials.
2. The steel gasket with sealing function according to claim 1, wherein: the thickness of the sealing layer ranges from 0.4mm to 0.6 mm.
3. The steel gasket with sealing function according to claim 2, wherein: the thickness of the sealing layer was 0.5 mm.
4. The steel gasket with sealing function according to claim 1, wherein: the sealing layer is made of ethylene propylene diene monomer.
5. The steel gasket with sealing function according to claim 1, wherein: the sealing layer is made of fluorinated rubber.
6. The utility model provides a lithium ion battery, sets up the through-hole of connecting utmost point post (5) on battery upper cover (4), its characterized in that: a compression sealing gasket (6) is arranged between the upper cover (4) of the battery and the pole (5); the upper surface of the compression seal (6) is provided with a steel gasket (3) having a sealing function according to any one of claims 1 to 5.
7. The utility model provides a sealed container, this sealed container's shell material is the material of difference with supporting framework, offers the through-hole of connecting rivet (9) on shell (7), and supporting framework is located the through-hole under, its characterized in that: the upper opening of the through hole is provided with a steel gasket (3) with a sealing function according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110798888.8A CN113611964A (en) | 2021-07-15 | 2021-07-15 | Steel gasket, lithium ion battery and sealed container with sealing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110798888.8A CN113611964A (en) | 2021-07-15 | 2021-07-15 | Steel gasket, lithium ion battery and sealed container with sealing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113611964A true CN113611964A (en) | 2021-11-05 |
Family
ID=78304692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110798888.8A Withdrawn CN113611964A (en) | 2021-07-15 | 2021-07-15 | Steel gasket, lithium ion battery and sealed container with sealing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113611964A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114759321A (en) * | 2022-05-24 | 2022-07-15 | 厦门海辰新能源科技有限公司 | Battery and sealing method |
| WO2024026774A1 (en) * | 2022-08-04 | 2024-02-08 | 宁德新能源科技有限公司 | Case, electrochemical device and manufacturing method therefor, and electronic device |
-
2021
- 2021-07-15 CN CN202110798888.8A patent/CN113611964A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114759321A (en) * | 2022-05-24 | 2022-07-15 | 厦门海辰新能源科技有限公司 | Battery and sealing method |
| CN114759321B (en) * | 2022-05-24 | 2024-03-08 | 厦门海辰储能科技股份有限公司 | Battery and sealing method |
| WO2024026774A1 (en) * | 2022-08-04 | 2024-02-08 | 宁德新能源科技有限公司 | Case, electrochemical device and manufacturing method therefor, and electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20211105 |