CN107588197B - Sealing member and battery sealing method - Google Patents
Sealing member and battery sealing method Download PDFInfo
- Publication number
- CN107588197B CN107588197B CN201710806743.1A CN201710806743A CN107588197B CN 107588197 B CN107588197 B CN 107588197B CN 201710806743 A CN201710806743 A CN 201710806743A CN 107588197 B CN107588197 B CN 107588197B
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- sealing
- intermediate connecting
- seal groove
- battery
- mating portion
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- 238000007789 sealing Methods 0.000 title claims abstract description 265
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003466 welding Methods 0.000 claims abstract description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 20
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 20
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 20
- 230000013011 mating Effects 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 12
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- SOZVEOGRIFZGRO-UHFFFAOYSA-N [Li].ClS(Cl)=O Chemical compound [Li].ClS(Cl)=O SOZVEOGRIFZGRO-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- YBDACTXVEXNYOU-UHFFFAOYSA-N C(F)(F)(F)F.[Li] Chemical compound C(F)(F)(F)F.[Li] YBDACTXVEXNYOU-UHFFFAOYSA-N 0.000 description 1
- FBDMJGHBCPNRGF-UHFFFAOYSA-M [OH-].[Li+].[O-2].[Mn+2] Chemical compound [OH-].[Li+].[O-2].[Mn+2] FBDMJGHBCPNRGF-UHFFFAOYSA-M 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229940095991 ferrous disulfide Drugs 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a sealing element and a battery sealing method, wherein the sealing element provided by the scheme is used for sealing a structure, has low requirement on the capacity of welding equipment when in use, and has simple structure and strong sealing reliability; the battery sealing method provided by the scheme can prolong the service life of the battery, ensures that the liquid leakage phenomenon does not occur in the long-time use process, can realize continuous operation on one machine, shortens the time for sealing process, improves the production efficiency, and comprises a matching part and a sealing part, wherein the matching part is larger than the matching part, the matching part is used for being in splicing fit with the sealing opening with a sealed product, and the sealing part is used for sealing the sealing opening outside the sealing opening.
Description
Technical Field
The invention relates to the technical field of sealing, in particular to a sealing element and a battery sealing method.
Background
Lithium primary batteries (lithium thionyl chloride batteries, lithium manganese dioxide batteries, lithium carbon fluoride batteries, lithium ferrous disulfide batteries and the like) are widely applied to intelligent meters, and with the increasing requirements of intelligent meter customers on the service life of the lithium primary batteries, particularly the lithium thionyl chloride batteries, the service life of the lithium primary batteries is increased from the previous 10 years to the current 20 years, so that the design of the reliability that the lithium primary batteries are sealed and do not leak liquid for 20 years is required in the aspect of sealing performance.
The lithium thionyl chloride battery is mainly sealed by two sealing points, one sealing point is the laser welding sealing or argon arc welding sealing of the battery cap and the shell, and the other sealing point is the sealing of the electrolyte injection port. The existing lithium thionyl chloride battery manufacturers mainly have three ways for sealing the liquid injection port, one way is to directly press a conical steel nail into the liquid injection port under the action of external pressure to perform physical sealing, the sealing way is safe and reliable in a short period, no liquid leakage condition exists within a plurality of years after practical verification, and the sealing performance is good; the second sealing mode is that a polytetrafluoroethylene conical rubber nail is used for sealing the liquid injection port, and a spherical steel ball is used for sealing by resistance welding after the liquid injection port is cleaned up by electro-hydraulic cleaning, so that the double-layer sealing mode is safe and reliable, the service life can be longer, but the on-line time of the battery is prolonged due to the fact that the double-layer sealing mode needs to be carried out step by step in the actual production process; the third sealing mode is that a spherical steel ball is directly used for sealing the liquid injection port by resistance welding, the sealing mode is simple, the service life and the reliability are high, but the requirement on the liquid injection process in battery production is very high, and only a few manufacturers can realize the third sealing mode internationally at present.
Disclosure of Invention
One object of the present invention is: the sealing element is simple in structure, reliable in performance, simple and convenient to operate in the sealing process and convenient to implement.
Another object of the invention is: the battery sealing method is provided, the sealing process can be simplified while the battery is sealed effectively by adopting the method, and the requirement of the liquid injection process is reduced.
Yet another object of the present invention is: the battery sealing method can be widely applied to sealing of long-life lithium batteries, sealing can be achieved through one-time operation by using the sealing method, and the requirement on the capacity of liquid injection equipment is reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, a sealing element is provided, which includes a fitting portion and a sealing portion having a larger external dimension than the fitting portion, the fitting portion is used for being in plug-in fit with a sealing opening of a product to be sealed, and the sealing portion is used for sealing the sealing opening outside the sealing opening.
As a preferable technical solution of the sealing member, the fitting portion is a tapered structure, and has a first fitting portion end far away from the sealing portion and a second fitting portion end close to the sealing portion, an outer dimension of the second fitting portion end is larger than an outer dimension of the first fitting portion end, and an outer dimension of the second fitting portion end is smaller than an outer dimension of the sealing portion.
As a preferable technical scheme of the sealing element, sealing layers are arranged outside the matching part and the sealing part, the sealing layers are made of polytetrafluoroethylene, and the sealing layers are polytetrafluoroethylene coatings formed on the surfaces of the sealing elements in a spraying manner, or the sealing layers are polytetrafluoroethylene films coated outside the sealing elements.
As a preferable technical solution of the sealing member, an intermediate connecting portion is provided between the fitting portion and the sealing portion, two ends of the intermediate connecting portion are respectively connected to the fitting portion and the sealing portion, an outer dimension of the intermediate connecting portion is smaller than an outer dimension of the sealing portion, and the outer dimension and the shape of the intermediate connecting portion are the same as those of the second end of the fitting portion.
As a preferable technical solution of the sealing element, the fitting portion is a conical frustum-shaped structure, and the intermediate connecting portion is a cylindrical structure having a diameter the same as that of a lower bottom surface of the fitting portion; the sealing part is a cylindrical structure with a diameter larger than that of the intermediate connecting part, or is a hemispherical structure with a diameter larger than that of the intermediate connecting part.
In another aspect, a battery sealing method is provided, in which a seal member having an engagement portion and a sealing portion having an outer dimension larger than that of the engagement portion is provided, the engagement portion is directed toward a battery filling opening, the seal member is pressed into the filling opening by an external force, and the filling opening is sealed together with the sealing portion by the engagement portion and the sealing portion by resistance welding a peripheral portion of the seal member and the filling opening.
As a preferable technical solution of the battery sealing method, the fitting portion has a tapered structure, and has a first fitting portion end far away from the sealing portion and a second fitting portion end close to the sealing portion, the outer dimension of the second fitting portion end is larger than that of the first fitting portion end, and the outer dimension of the second fitting portion end is smaller than that of the sealing portion.
As a preferable technical scheme of the battery sealing method, a sealing layer is arranged outside the sealing element, the sealing layer is made of polytetrafluoroethylene, the sealing layer is a polytetrafluoroethylene coating formed on the surface of the sealing element in a spraying manner, or the sealing layer is a polytetrafluoroethylene film coated outside the sealing element.
As a preferable technical solution of the battery sealing method, an intermediate connecting portion is provided between the fitting portion and the sealing portion, both ends of the intermediate connecting portion are respectively connected to the fitting portion and the sealing portion, an outer dimension of the intermediate connecting portion is smaller than an outer dimension of the sealing portion, and the outer dimension and the shape of the intermediate connecting portion are the same as those of the second end of the fitting portion.
As a preferable technical solution of the battery sealing method, the fitting portion has a conical frustum-shaped structure, and the intermediate connecting portion has a cylindrical structure having a diameter identical to that of a lower bottom surface of the fitting portion; the sealing part is a cylindrical structure with a diameter larger than that of the intermediate connecting part, or is a hemispherical structure with a diameter larger than that of the intermediate connecting part.
The invention has the beneficial effects that: the sealing element provided by the scheme is used for sealing the structure, has low requirement on the capacity of welding equipment when in use, and has simple structure and strong sealing reliability; the battery sealing method provided by the scheme can prolong the service life of the battery, ensure that the leakage phenomenon does not occur in the long-time use process, realize continuous operation on one machine, shorten the time of the sealing process and improve the production efficiency.
Drawings
The invention is explained in more detail below with reference to the figures and examples.
Fig. 1 is a schematic structural diagram of a sealing member according to an embodiment of the present invention.
Fig. 2 is another schematic structural diagram of the sealing member according to the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a sealing element with a sealing ring installation groove arranged on a mating portion according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of the sealing element shown in fig. 3 after an elastic sealing ring is mounted thereon.
Fig. 5 is a schematic structural diagram of another sealing element with a sealing ring installation groove formed in a mating portion according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of the sealing member shown in fig. 5 after the first elastic sealing member and the second elastic sealing member are mounted thereon.
In the figure:
1. a fitting portion; 2. a sealing part; 3. an intermediate connecting portion; 4. a sealing ring mounting groove; 5. an elastic sealing ring; 6. a first seal groove; 7. a second seal groove; 8. a first resilient seal member; 9. a second resilient seal.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1 to 6, in the embodiment, the sealing member of the present invention includes a fitting portion 1 and a sealing portion 2 having an outer dimension larger than that of the fitting portion 1, where the fitting portion 1 is used for being inserted into and fitted with a sealing opening of a product to be sealed, and the sealing portion 2 is used for sealing the sealing opening outside the sealing opening.
Through providing the integral type sealing member that has cooperation portion 1 and sealing portion 2 in this scheme, cooperation portion 1 is arranged in inserting the sealing opening and carries out preliminary sealing, and sealing portion 2 is the sealing opening shutoff completely to can guarantee sealed effect through the welding after with sealing portion 2 and sealing opening week portion welded connection.
In the scheme, the matching part 1 is arranged into a conical structure, so that the matching part can be conveniently inserted into the sealing opening, and can be conveniently and gradually in close contact with the sealing opening, and the leakage caused by the generation of gaps is avoided. Meanwhile, the requirement on the dimensional accuracy of the composite material is reduced, so that the composite material is convenient to process and the production cost is reduced.
The cooperation portion 1 with the outside of sealing portion 2 all is provided with the sealing layer, the sealing layer is the polytetrafluoroethylene material, and the sealing performance of sealing member can further be improved through the sealing layer that sets up the polytetrafluoroethylene material, in this embodiment the sealing layer is formed for the mode through the spraying the polytetrafluoroethylene coating on sealing member surface.
The arrangement mode of the sealing layer is not limited to the case described in the embodiment, and in other embodiments, the sealing layer may also be a polytetrafluoroethylene film coated outside the sealing member.
In the embodiment, a sealing circular hole is taken as an example to introduce the structure of the sealing element, the matching part 1 is in a circular truncated cone structure, and the middle connecting part 3 is in a cylindrical structure with the diameter the same as that of the lower bottom surface of the matching part 1; as shown in fig. 1, 5 and 6, the sealing portion 2 has a cylindrical structure with a diameter larger than that of the intermediate connecting portion 3.
As shown in fig. 2-4, the sealing portion 2 may also be a hemispherical structure having a diameter larger than the diameter dimension of the intermediate connecting portion 3.
In other embodiments, the shape of the sealing element can be adjusted according to the shape of the hole to be sealed, so that the shape of the matching part 1 is matched with the shape of the opening to be sealed, and the maximum position size of the matching part 1 is larger than the size of the opening to be sealed.
As a preferred technical solution, in this embodiment, a sealing ring installation groove 4 may be further formed on the fitting portion 1, an elastic sealing ring 5 protruding from an outer surface of the fitting portion 1 is disposed in the sealing ring installation groove 4, and by disposing the elastic sealing ring 5, the elastic sealing ring 5 is pressed when the fitting portion 1 is inserted into the opening to be sealed, so that the elastic sealing ring is in close contact with an inner side wall of the opening to be sealed, thereby further improving the sealing performance.
As a preferred technical solution, the elastic sealing ring 5 is a rubber sealing ring.
In other embodiments, the elastic sealing ring 5 may also be provided in other forms, for example, in another preferred embodiment, the sealing ring installation groove 4 includes a first sealing groove 6 and a second sealing groove 7 located on different circumferences of the fitting portion 1, the first sealing groove 6 and the second sealing groove 7 both cover a range larger than a half circumference in the circumferential direction, so that portions of both ends of the first sealing groove 6 and the second sealing groove 7 overlap each other, the first sealing groove 6 and the second sealing groove 7 communicate with each other at the overlapping portions thereof, a first elastic sealing member 8 is installed in the first sealing groove 6, a second elastic sealing member 9 is installed in the second sealing groove 7, the first elastic sealing member 8 and the second elastic sealing member 9 both cover an elastic sealing member larger than a half circumference, so that the first elastic sealing member 8 and the second elastic sealing member 9 partially overlap each other, the complementation in the sealing effect is realized. In order to facilitate the deformation of the first elastic sealing element 8 and the second elastic sealing element 9, in this embodiment, the coverage area of the first elastic sealing element 8 in the circumferential direction is smaller than that of the first sealing groove 6, and the coverage area of the second elastic sealing element 9 in the circumferential direction is smaller than that of the second sealing groove 7.
The present embodiment also provides a battery sealing method, which provides a sealing member having a fitting part 1 and a sealing part 2 having an outer dimension larger than that of the fitting part 1, wherein the fitting part 1 is directed toward a battery filling opening, the sealing member is pressed into the filling opening by an external force, and the filling opening is sealed together with the sealing member and the sealing part 2 by the fitting part 1 and the sealing part 2 by resistance welding the sealing member and the periphery of the filling opening.
The sealing piece is characterized in that a sealing layer is arranged outside the sealing piece and made of polytetrafluoroethylene, the sealing layer is a polytetrafluoroethylene coating formed on the surface of the sealing piece in a spraying mode, or the sealing layer is a polytetrafluoroethylene film coated outside the sealing piece.
The matching part 1 is of a circular truncated cone structure, and the middle connecting part 3 is of a cylindrical structure with the diameter identical to that of the lower bottom surface of the matching part 1; the sealing part 2 is a cylindrical structure with a diameter larger than that of the intermediate connection part 3, or the sealing part 2 is a hemispherical structure with a diameter larger than that of the intermediate connection part 3.
The battery sealing method described in this embodiment uses the sealing member described in the embodiment to seal the battery, and it should be noted that the sealing member is not limited to be used for sealing the battery, and may also be applied to other sealing products, especially products requiring long service life and having corrosive substances inside.
In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are based on the orientations and positional relationships shown in the drawings and are used for convenience in description and simplicity in operation, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single technical solution, and such description is for clarity only, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that may be understood by those skilled in the art.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (8)
1. The sealing element is characterized by comprising a matching part and a sealing part, wherein the external dimension of the sealing part is larger than that of the matching part, the matching part is used for being in plug-in fit with a sealing opening of a product with sealing, and the sealing part is used for closing the sealing opening outside the sealing opening;
an intermediate connecting part is arranged between the matching part and the sealing part, two ends of the intermediate connecting part are respectively connected with the matching part and the sealing part, the external dimension of the intermediate connecting part is smaller than that of the sealing part, and the external dimension and the shape of the intermediate connecting part are the same as those of the second end of the matching part;
first seal groove and second seal groove have been seted up to cooperation portion on different circumferences, first seal groove with the scope that the second seal groove covered on the circumferencial direction all is greater than the semicircle, just the both ends of first seal groove respectively with the both ends part coincidence of second seal groove and intercommunication install length in the first seal groove and be less than the first elastic sealing element of first seal groove install length in the second seal groove and be less than the second elastic sealing element of second seal groove, just first elastic sealing element's both ends respectively with the both ends part coincidence of second elastic sealing element.
2. The seal of claim 1, wherein said mating portion is tapered having a mating portion first end distal from said sealing portion and a mating portion second end proximal to said sealing portion, said mating portion second end having a larger outer dimension than said mating portion first end and said mating portion second end having a smaller outer dimension than said sealing portion.
3. The sealing element according to claim 2, wherein sealing layers are arranged outside the matching part and the sealing part, the sealing layers are made of polytetrafluoroethylene, and the sealing layers are polytetrafluoroethylene coatings formed on the surface of the sealing element in a spraying mode or polytetrafluoroethylene films covering the outside of the sealing element.
4. The seal of claim 3, wherein the mating portion is a conical frustum-shaped structure and the intermediate connecting portion is a cylindrical structure having a diameter equal to a diameter of a lower bottom surface of the mating portion; the sealing part is a cylindrical structure with a diameter larger than that of the intermediate connecting part, or is a hemispherical structure with a diameter larger than that of the intermediate connecting part.
5. A battery sealing method is characterized in that a sealing member having an engaging portion and a sealing portion with an outer dimension larger than that of the engaging portion is provided, the engaging portion is directed toward a battery filling opening, the sealing member is pressed into the filling opening by an external force, and the filling opening is sealed together with the sealing portion by the engaging portion and the sealing portion by resistance welding the sealing member to the peripheral portion of the filling opening;
the cooperation portion with be provided with intermediate junction portion between the sealing, intermediate junction portion both ends are connected respectively the cooperation portion with the sealing, the overall dimension of intermediate junction portion is less than the overall dimension of sealing, the overall dimension and the shape of intermediate junction portion with cooperation portion second end is the same.
6. The method of claim 5, wherein the mating portion is tapered having a mating portion first end distal from the sealing portion and a mating portion second end proximal to the sealing portion, the mating portion second end having a larger outer dimension than the mating portion first end and the mating portion second end having a smaller outer dimension than the sealing portion.
7. The battery sealing method according to claim 6, wherein a sealing layer is provided outside the sealing member, the sealing layer is made of polytetrafluoroethylene, the sealing layer is a polytetrafluoroethylene coating formed on the surface of the sealing member by spraying, or the sealing layer is a polytetrafluoroethylene film coated outside the sealing member.
8. The battery sealing method according to claim 7, wherein the fitting portion is a conical frustum-shaped structure, and the intermediate connecting portion is a cylindrical structure having the same diameter as that of a lower bottom surface of the fitting portion; the sealing part is a cylindrical structure with a diameter larger than that of the intermediate connecting part, or is a hemispherical structure with a diameter larger than that of the intermediate connecting part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710806743.1A CN107588197B (en) | 2017-09-08 | 2017-09-08 | Sealing member and battery sealing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710806743.1A CN107588197B (en) | 2017-09-08 | 2017-09-08 | Sealing member and battery sealing method |
Publications (2)
| Publication Number | Publication Date |
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| CN107588197A CN107588197A (en) | 2018-01-16 |
| CN107588197B true CN107588197B (en) | 2020-04-14 |
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| CN201710806743.1A Active CN107588197B (en) | 2017-09-08 | 2017-09-08 | Sealing member and battery sealing method |
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| CN (1) | CN107588197B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN119253165A (en) * | 2024-09-09 | 2025-01-03 | 宜春国轩电池有限公司 | A sealing welding structure and sealing method for reducing the explosion point of sealing welding |
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| CN203363156U (en) * | 2013-05-28 | 2013-12-25 | 中国人民解放军海军工程大学 | Sealing device enabling tail shaft sealing fillers to be replaced without the need of ship docking |
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| Publication number | Publication date |
|---|---|
| CN107588197A (en) | 2018-01-16 |
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