CN109980147B - Exhaust packaging method for underwater power supply - Google Patents
Exhaust packaging method for underwater power supply Download PDFInfo
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- CN109980147B CN109980147B CN201910228926.9A CN201910228926A CN109980147B CN 109980147 B CN109980147 B CN 109980147B CN 201910228926 A CN201910228926 A CN 201910228926A CN 109980147 B CN109980147 B CN 109980147B
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- cover
- exhaust
- sealing
- power supply
- battery
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 64
- 239000003292 glue Substances 0.000 claims abstract description 38
- 239000000565 sealant Substances 0.000 claims abstract description 22
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 14
- 229920003023 plastic Polymers 0.000 claims description 14
- 229920006351 engineering plastic Polymers 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- -1 acrylic ester Chemical class 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 229920003051 synthetic elastomer Polymers 0.000 claims description 3
- 239000005061 synthetic rubber Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- 238000005086 pumping Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000004026 adhesive bonding Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000004382 potting Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- 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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses an exhaust packaging method of an underwater power supply, which comprises the following steps: s1, sealing the battery pack in the shell through glue filling, and forming a battery sealing body after the battery pack is filled with glue; s2, assembling the cover body on the shell; the cover body comprises a cover plate provided with an exhaust hole and a sealing plate; s3, vacuumizing the space between the cover body and the battery sealing body through the exhaust hole to form a vacuum chamber; and S4, dispensing sealant around the vent hole, covering the seal plate on the vent hole and fixing the seal plate on the cover plate by sealant, and sealing the vacuum chamber. The method for exhausting and packaging the underwater power supply vacuumizes the space between the battery sealing body and the shell to ensure that the interior of the shell is a vacuum environment, and avoids the phenomenon that the pressure in the shell is increased by heat generated when a battery pack discharges at a high rate in the presence of air so as to deform and lose the waterproof effect. Meanwhile, the problem that the battery works in a high-temperature, high-pressure and high-humidity sealed environment for a long time is solved, and the service life and the safety performance of the battery are improved.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to an exhaust packaging method of an underwater power supply.
Background
With the development of science and technology, the development of underwater exploration and underwater equipment is more and more common, and most of underwater equipment needs power supply support, so that the demand of an underwater power supply is brought. However, the lithium ion battery pack has high requirements for the external environment during operation, and thus the underwater power supply must have an excellent sealing effect. In order to solve the problem, the battery pack and the shell form a sealing body by adopting a glue pouring process, so that remarkable waterproof and heat dissipation effects are obtained, and the yield is greatly improved. However, the assembling space of the cover plate and the shell needs to be reserved during glue filling. For this reason, the space reserved between the cover plate and the potting adhesive is filled with air. When the battery pack is in high-rate discharge operation, the generated heat raises the temperature in the shell, so that the air pressure in the reserved space in the shell is increased, and the sealed shell is forced to deform. Under the action of stress, a gap is formed at the packaging position of the shell and the cover plate, and finally, water leakage is caused, so that the whole battery is scrapped. Meanwhile, the temperature inside the shell is high when the battery pack works, the temperature of the outer surface of the shell is low when the battery pack is soaked in water, the temperature difference between the inside and the outside of the shell enables the air in the shell to reach the dew point temperature, and then water vapor in the air inside the shell is liquefied into small water drops, so that the whole battery pack works in the high-temperature, high-pressure and high-humidity environment, the service life of the battery is greatly shortened, and even serious potential safety hazards are brought to users.
In addition, the current bonding process of the power supply plastic shell mainly comprises the modes of buckle packaging bonding, screw connection, ultrasonic welding fusion, gluing bonding and the like. The buckle packaging combination and the screw connection do not have a waterproof function, the requirement on a mold is high, and the occupied space of a shell is large; the requirements of ultrasonic welding on factors such as plastic materials, ultrasonic line structure design, equipment parameters and the like are high, and after ultrasonic fusion, an unfused area exists between interfaces, so that the effect of complete sealing cannot be achieved; the requirement of the gluing and bonding process on the die and the packaging equipment is low, the packaging operation is simple, but the selection of the glue is determined according to the material of the plastic shell. Most of the quick-drying glue on the current market only plays a role in temporarily fixing and bonding, and the glue at the interface is aged and loses efficacy along with the prolonging of the service time of the battery, so that the long-term sealing effect cannot be achieved.
Disclosure of Invention
The present invention is directed to provide an exhaust packaging method for underwater power supply, which avoids expansion of the housing and condensation of water inside the housing.
The technical scheme adopted by the invention for solving the technical problems is as follows: the exhaust packaging method of the underwater power supply comprises the following steps:
s1, sealing the battery pack in the shell through glue filling, wherein the battery pack forms a battery sealing body after the glue filling;
s2, assembling the cover body on the shell;
the cover body comprises a cover plate provided with an exhaust hole and a sealing plate matched with the exhaust hole;
s3, vacuumizing the space between the cover body and the battery sealing body through the exhaust hole to form a vacuum chamber;
and S4, sealing glue is distributed at the periphery of the exhaust hole, the sealing plate covers the exhaust hole and is fixed on the cover plate through the sealing glue, and the vacuum chamber is sealed.
Preferably, in step S3, the vacuum degree of the vacuum chamber is-0.2 MPa to-0.8 MPa.
Preferably, an annular groove is arranged on the surface of the cover plate, which faces away from the shell, and the annular groove is positioned on the periphery of the exhaust hole and communicated with the exhaust hole;
in step S4, the sealing plate is fitted with its periphery in the annular groove to cover the exhaust hole.
Preferably, the bottom surface of the annular groove is provided with an inwards concave glue groove, and the periphery of the sealing plate is provided with an annular bulge matched with the glue groove;
in step S4, the sealant is beaten in the sealant tank; the annular bulge of the sealing plate is embedded into the glue groove.
Preferably, in step S3, a cover is mounted on the outer case to close the space between the vent hole and the cover and the battery sealing body, and the internal space of the cover is communicated with the space between the cover and the battery sealing body through the vent hole to form a closed cavity; and connecting a vacuumizing device to vacuumize the inside of the cavity.
Preferably, in step S3, an evacuation tube connected to the evacuation device penetrates into the cover body, and the evacuation device communicates with the chamber through the evacuation tube and evacuates the chamber.
Preferably, in step S4, a glue applying pipe is inserted into the cover body to above the exhaust hole, and a glue is applied to a peripheral point of the exhaust hole.
Preferably, the sealant comprises the following raw materials in parts by weight: 0.10-0.25 part of acrylic ester, 1.0-2.0 parts of engineering plastic, 7-13 parts of plastic adhesive and 80-90 parts of solvent.
Preferably, the engineering plastic comprises PC and/or ABS; the plastic adhesive comprises DMC, EAC, resin and synthetic rubber; the solvent comprises acetone.
Preferably, the sealant comprises the following raw materials in parts by weight: 0.15 part of acrylic ester, 1.5 parts of engineering plastic, 10 parts of plastic adhesive and 88.35 parts of solvent.
The invention has the beneficial effects that: before the shell is sealed, the space between the battery sealing body and the shell is vacuumized to exhaust air in the space, the shell is sealed on a cover plate through the sealing plate cover under the condition of keeping vacuum, the interior of the shell is in a vacuum environment, and the phenomenon that the air pressure in the shell is increased due to heat generated during the high-rate discharge work of a battery pack to cause the shell to deform and leak is avoided. Meanwhile, the temperature difference between the inside and the outside of the shell is avoided, so that water vapor in the air inside the shell is gasified into water drops, and the service life of the whole battery pack is influenced.
In addition, the sealing plate is tightly adhered to the cover plate through a specific sealant, the components and the proportion of the sealant are specifically configured according to the material of the plastic shell, so that the sealant becomes a specific chemical welding agent, the surface parts of the cover plate and the sealing plate can be dissolved, the cover plate and the sealing plate are fused into a whole, and the sealing plate can not be separated even if the sealing plate is used underwater for a long time.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic cross-sectional view of an underwater power supply in an exhaust package according to an embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
With reference to fig. 1, an exhaust packaging method for an underwater power supply according to an embodiment of the present invention includes the following steps:
and S1, sealing the battery pack in the shell through glue filling, and forming a battery sealing body 20 after the battery pack is filled with glue.
The case 10 is an open-top case, and the battery pack is put into the case 10 from the open top. During the encapsulating, the colloid is filled between the battery pack and the inner wall of the shell 10 and is filled to a certain height above the battery pack, the battery pack is wrapped, the battery pack is packaged and fixed in the shell 10, and a battery sealing body 20 is formed between the battery pack and the battery pack. The outer circumference and the bottom surface of the battery sealing body 30 are closely adhered to the inner wall and the bottom surface of the case 10. The glue used for glue filling has the characteristics of insulation, heat conduction and the like.
S2, the cover 30 is assembled to the housing 10.
The cover 30 includes a cover plate 31 and a sealing plate 32. The cover plate 31 is provided with an exhaust hole 33 (e.g., at a central position) for exhausting air. The sealing plate 32 is fitted to the exhaust hole 33 for closing the exhaust hole 33.
The cover 30 closes the open top of the housing 10 over the housing 10 such that the cover 30 cooperates with the housing 10 to form a sealed enclosure for the underwater power supply. A space is left between the inner surface of the lid body 30 and the battery sealing body 20 inside the case 10, so that a space 40 between the battery sealing body 20 and the lid body 30 is formed inside the case 10.
In this embodiment, the surface of the cover plate 31 facing away from the housing 10 is provided with an annular groove 34, and the annular groove 34 is located at the periphery of the exhaust hole 33 and communicates with the exhaust hole 33.
The bottom surface of the annular groove 34 may further be provided with an inwardly concave glue groove 35, and the periphery of the sealing plate 32 is provided with an annular protrusion 36 adapted to the glue groove 35.
S3, the space 40 between the lid body 30 and the battery sealing body 20 is evacuated through the vent hole 33, and the space 40 between the lid body 30 and the battery sealing body 20 is formed as a vacuum chamber. The vacuum degree of the vacuum chamber is-0.2 MPa to-0.8 MPa, and preferably-0.6 MPa.
Before evacuation, the cover 50 is mounted on the top of the housing 10 to seal the vent hole 33, the space 40 between the cover 30 and the battery enclosure 20, and the internal space of the cover 50 is communicated with the space 40 between the cover 30 and the battery enclosure 20 through the vent hole 33 to form a closed chamber. The vacuum-pumping device is connected to evacuate the interior of the chamber, so that the air in the chamber is exhausted to form a vacuum environment, and the space 40 between the lid body 30 and the battery sealing body 20 is also evacuated to form a vacuum chamber.
Specifically, during vacuum pumping, the vacuum pumping pipe 51 can penetrate into the cover 50, and the vacuum pumping pipe 51 is communicated with the vacuum pumping device, so that the vacuum pumping device is communicated with the cavity in the cover 50 for vacuum pumping.
S4, a sealant (not shown) is applied to the outer periphery of the exhaust hole 33, and the sealing plate 32 is fixed to the cover plate 31 by the sealant while covering the exhaust hole 33, thereby closing the vacuum chamber.
When gluing, a gluing pipe 52 of the gluing device penetrates into the cover body 50 to the upper part of the exhaust hole 33, and the sealant is dispensed on the periphery of the exhaust hole 33. The sealing plate 32 is fitted over the vent hole 33 by inserting the fitting tool 60 through the casing 50, and the vent hole 33 is closed by adhering the sealing plate 32 to the cover plate 31 with a sealant. The sealing plate 32 and the cover plate 31 form a lid 30 that closes the housing 10 on the housing 10 to form a sealed case.
Specifically, when the adhesive is applied, the adhesive is dispensed into the adhesive groove 35 of the annular groove 34 on the outer periphery of the exhaust hole 33. When the sealing plate 32 is closed, the sealing plate 32 is fitted into the annular groove 34 with its periphery to cover the vent hole 33, and the annular protrusion 36 on the sealing plate 32 is inserted into the glue groove 35, so that the sealing glue in the glue groove 35 adheres the annular protrusion and the cover plate 31 where the glue groove 35 is located.
In the process of the above step S4, the vacuum degree after the vacuum-pumping is always maintained, so that the space 40 inside the case 10 is in a vacuum environment after the case is closed, thereby preventing the battery sealing body 30 from swelling.
After the cover plate 30 is integrally mounted, the cover 50 can be removed from the housing 10, and the exhaust packaging of the underwater power supply is completed.
Further, in the invention, the sealant and the glue of the potting glue are different glues.
The sealant comprises the following raw materials: acrylates, engineering plastics, plastic adhesives and solvents; the weight parts of the raw materials are as follows: 0.10-0.25 part of acrylic ester, 1.0-2.0 parts of engineering plastic, 7-13 parts of plastic adhesive and 80-90 parts of solvent.
Wherein the engineering plastic comprises PC (polycarbonate) and/or ABS; plastic adhesives include DMC (dimethyl carbonate), EAC (ethyl acetate), resins, and synthetic rubbers. The solvent is acetone.
In a preferred embodiment of the sealant, the sealant comprises: 0.15 part of acrylic ester, 1.5 parts of engineering plastic, 10 parts of plastic adhesive and 88.35 parts of solvent.
The sealant in the invention is used as a chemical welding agent, can dissolve the surface parts of the cover plate 31 and the sealing plate 32, enables the cover plate 31 and the sealing plate 32 to be tightly adhered together to form a whole, can not be separated even if used underwater for a long time, and ensures the waterproof performance and the service life of an underwater power supply.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. An exhaust packaging method for an underwater power supply is characterized by comprising the following steps:
s1, sealing the battery pack in the shell through glue filling, wherein the battery pack forms a battery sealing body after the glue filling;
s2, assembling the cover body on the shell;
the cover body comprises a cover plate provided with an exhaust hole and a sealing plate matched with the exhaust hole;
s3, vacuumizing the space between the cover body and the battery sealing body through the exhaust hole to form a vacuum chamber; in step S3, a cover is mounted on the housing to seal the space between the vent hole and the cover and the battery sealing body, and the internal space of the cover is communicated with the space between the cover and the battery sealing body through the vent hole to form a closed cavity; connecting a vacuumizing device to vacuumize the interior of the cavity;
and S4, sealing glue is distributed at the periphery of the exhaust hole, the sealing plate covers the exhaust hole and is fixed on the cover plate through the sealing glue, and the vacuum chamber is sealed.
2. The exhaust packaging method of the underwater power supply of claim 1, wherein in step S3, the vacuum degree of the vacuum chamber is from-0.2 MPa to-0.8 MPa.
3. The exhaust packaging method of the underwater power supply as claimed in claim 1, wherein an annular groove is formed on a surface of the cover plate facing away from the housing, the annular groove being located at the periphery of the exhaust hole and communicating with the exhaust hole;
in step S4, the sealing plate is fitted with its periphery in the annular groove to cover the exhaust hole.
4. The exhaust packaging method of the underwater power supply as claimed in claim 3, wherein the bottom surface of the annular groove is provided with an inward-concave glue groove, and the periphery of the sealing plate is provided with an annular protrusion matched with the glue groove;
in step S4, the sealant is beaten in the sealant tank; the annular bulge of the sealing plate is embedded into the glue groove.
5. The exhaust packaging method of the underwater power supply of claim 1, wherein in step S3, an evacuation tube connected to the evacuation device is inserted into the cover body, and the evacuation device is communicated with the chamber through the evacuation tube and evacuates the chamber.
6. The exhaust packaging method of the underwater power supply as claimed in claim 1, wherein in step S4, a glue applying pipe is inserted into the cover body to the position above the exhaust hole, and the glue is applied to the periphery of the exhaust hole.
7. The exhaust packaging method of the underwater power supply as claimed in any one of claims 1 to 6, wherein the sealant comprises the following raw materials in parts by weight: 0.10-0.25 part of acrylic ester, 1.0-2.0 parts of engineering plastic, 7-13 parts of plastic adhesive and 80-90 parts of solvent.
8. The exhaust packaging method of an underwater power supply according to claim 7, wherein said engineering plastic comprises PC and/or ABS; the plastic adhesive comprises DMC, EAC, resin and synthetic rubber; the solvent comprises acetone.
9. The exhaust packaging method of the underwater power supply as claimed in claim 7, wherein the sealant comprises the following raw materials in parts by weight: 0.15 part of acrylic ester, 1.5 parts of engineering plastic, 10 parts of plastic adhesive and 88.35 parts of solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910228926.9A CN109980147B (en) | 2019-03-25 | 2019-03-25 | Exhaust packaging method for underwater power supply |
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|---|---|---|---|
| CN201910228926.9A CN109980147B (en) | 2019-03-25 | 2019-03-25 | Exhaust packaging method for underwater power supply |
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| CN109980147A CN109980147A (en) | 2019-07-05 |
| CN109980147B true CN109980147B (en) | 2021-10-22 |
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| CN206353552U (en) * | 2016-11-14 | 2017-07-25 | 浙江超威创元实业有限公司 | A kind of battery case body of energy heat-insulation and heat-preservation |
| CN109021876A (en) * | 2017-06-11 | 2018-12-18 | 淄博市思瑞颖胶粘剂有限公司 | It is packed for solvent-type acrylic ester overlay film adhesive |
| CN207338447U (en) * | 2017-06-14 | 2018-05-08 | 多氟多（焦作）新能源科技有限公司 | A kind of waterproof soft package lithium battery module |
| CN207602644U (en) * | 2017-08-29 | 2018-07-10 | 沈阳航天新光集团有限公司 | A kind of underwater vehicle lithium battery group |
| CN208217465U (en) * | 2018-04-25 | 2018-12-11 | 重庆大道泡沫塑料包装材料有限公司 | Water proof type packing case |
| CN109455283A (en) * | 2018-12-27 | 2019-03-12 | 中国科学院深海科学与工程研究所 | A kind of power-supply system applied to benthoscope |
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