CN112038509A - Waterproof housing, waterproof power supply and manufacturing method thereof - Google Patents

Waterproof housing, waterproof power supply and manufacturing method thereof Download PDF

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Publication number
CN112038509A
CN112038509A CN201910477333.6A CN201910477333A CN112038509A CN 112038509 A CN112038509 A CN 112038509A CN 201910477333 A CN201910477333 A CN 201910477333A CN 112038509 A CN112038509 A CN 112038509A
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CN
China
Prior art keywords
shell
waterproof
housing
battery pack
cover
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Pending
Application number
CN201910477333.6A
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Chinese (zh)
Inventor
周清
张贵刚
陈凯
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Dongguan Yizhuoer Energy Co ltd
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Dongguan Yizhuoer Energy Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Dongguan Yizhuoer Energy Co ltd filed Critical Dongguan Yizhuoer Energy Co ltd
Priority to CN201910477333.6A priority Critical patent/CN112038509A/en
Publication of CN112038509A publication Critical patent/CN112038509A/en
Pending legal-status Critical Current

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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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses a waterproof shell, a waterproof power supply and a manufacturing method thereof, wherein the waterproof shell comprises a main shell made of heat-conducting plastics, and the main shell comprises a shell with an opening at one end and a cover body matched with the opening end of the shell; concave-convex structures matched with each other are arranged on the opening ends of the cover body and the shell body; the cover body is matched with the opening end of the shell through the concave-convex structure and fixedly connected to the opening end of the shell in a vibration friction welding mode to form a closed main shell together with the shell. In the invention, the main shell of the waterproof shell is made of heat-conducting plastics, so that the waterproof battery has a heat dissipation function and improves the heat dissipation capability of the waterproof battery; the shell and the cover body of the waterproof shell are connected into a whole in a vibration friction welding and sealing mode, the welding position has good strength, air tightness and impact resistance, the waterproof effect is improved, and the process is simple and easy to operate.

Description

Waterproof housing, waterproof power supply and manufacturing method thereof
Technical Field
The invention relates to the technical field of power supplies, in particular to a waterproof shell, a waterproof power supply and a manufacturing method of the waterproof shell.
Background
With the development of science and technology, the underwater exploration is deep, the development of underwater equipment is more and more common, and the waterproof power supply can be applied to the fields of diving entertainment, underwater salvage, aquaculture, national defense military industry and the like. The existing waterproof power supply shell is generally made of plastics, has simple production process and low cost, and is easy to form various complex structures through injection molding.
However, most plastics have poor thermal conductivity, resulting in poor heat dissipation from the waterproof power supply. The current waterproof power supply has the following problems by combining the current waterproof power supply production process and the product practical application effect analysis:
1. the heat dissipation effect is poor. The battery package of waterproof power is sealed in the plastic casing, to the battery of a lot of multiplying powers discharge, can produce a large amount of heat at the discharge in-process, however plastic casing's heat conductivity is poor, and the heat is concentrated and is difficult to distribute out in the casing, causes the loss to the battery, has the potential safety hazard even.
2. The waterproof performance is poor. The battery pack has high temperature requirements on the external environment, and the battery pack in the shell is heated and damaged by the hot melting welding process of a plurality of plastics. Therefore, the upper and lower cases are difficult to be completely combined in a sealed manner, resulting in poor waterproof effect of the product.
3. The production process is complex. As described in point 2, the battery pack has limitations on the use environment, so that many plastic thermal welding processes cannot be applied to the packaging production of waterproof power supply housings. Therefore, the current packaging process of the waterproof power supply is mainly sealing by gluing, however, in the gluing process, the glue amount needs to be strictly controlled, the operation requirement on workers is high, the sealant needs to be specifically selected according to plastics of different materials, and the product consistency is difficult to ensure.
Disclosure of Invention
The present invention is directed to a waterproof casing for a waterproof power supply, which has a heat dissipation function, a waterproof power supply having the waterproof casing, and a method for manufacturing the waterproof power supply.
The technical scheme adopted by the invention for solving the technical problems is as follows: providing a waterproof shell for a waterproof power supply, wherein the waterproof shell comprises a main shell made of heat-conducting plastic, and the main shell comprises a shell with an opening at one end and a cover body matched with the opening end of the shell;
concave-convex structures matched with each other are arranged on the opening ends of the cover body and the shell body; the cover body is matched with the opening end of the shell through the concave-convex structure and fixedly connected to the opening end of the shell in a vibration friction welding mode to form a closed main shell together with the shell.
Preferably, the thermally conductive plastic includes a resin matrix, a thermally conductive agent, a flame retardant, and a reinforcing agent.
Preferably, the resin matrix comprises at least one of PA, PC and ABS; the heat conducting agent comprises AlN, SiC and Al2O3At least one of MgO and ZnO; the reinforcing agent includes glass fibers.
Preferably, the concave-convex structure comprises an annular groove arranged on the matching end surface of the cover body facing the shell and extending along the circumferential direction of the cover body, and an annular bulge arranged on the end surface of the open end of the shell corresponding to the annular groove;
the annular bulge is matched in the annular groove and connected with the annular groove through vibration friction welding, so that the cover body is connected to the shell in a sealing mode.
Preferably, the lid orientation the mating end face of casing is equipped with inside and outside looks interval and follows lid circumference extension's annular glues the position, two the interval between the annular glues the position forms annular groove.
Preferably, after the annular protrusion is connected with the bottom surface of the annular groove, a gap is left between the annular glue position on the outer side of the cover body and the end surface of the opening end of the shell;
the height H1 of the annular protrusion is greater than the depth H2 of the annular groove, and H1, H2 and the width H3 of the gap satisfy H1-H2 + H3+0.2 mm.
Preferably, the cover body is internally provided with a reinforcing rib structure which is distributed at intervals along the circumferential direction of the cover body.
Preferably, the waterproof case further comprises a support plate disposed within the open end of the case; and/or the presence of a gas in the gas,
the waterproof shell further comprises two output terminals which are embedded on the outer surface of the shell and are separated.
The invention also provides a waterproof power supply which comprises the waterproof shell, a battery pack arranged in the shell of the waterproof shell and heat-conducting silica gel for sealing and fixing the battery pack in the waterproof shell.
Preferably, the support plate of the waterproof case covers the battery pack between the battery pack and the cover;
and the positive plate and the negative plate of the battery pack are respectively and electrically connected with the positive terminal and the negative terminal on the waterproof shell.
The invention also provides a manufacturing method of the waterproof power supply, which comprises the following steps:
s1, placing the battery pack into the shell from the opening end of the shell, and electrically connecting the positive plate and the negative plate of the battery pack with the two output terminals on the shell respectively;
s2, pouring heat-conducting silica gel into the shell, and sealing and fixing the battery in the shell after the heat-conducting silica gel is solidified;
s3, respectively installing the shell and the cover body provided with the battery pack into a lower die and an upper die of a vibration friction machine;
and S4, starting the vibration friction machine, matching the cover body to the opening end of the shell body and performing vibration friction welding to obtain the waterproof power supply.
Preferably, in step S2, after the thermal conductive silica gel is cured, a support plate is placed in the open end of the housing, and glue is applied between the outer periphery of the support plate and the inner wall of the housing, and the support plate is fixed in the housing.
The invention has the beneficial effects that: the main shell of the waterproof shell is made of heat-conducting plastics, so that the waterproof shell has a heat dissipation function and improves the heat dissipation capacity of the waterproof battery; the shell and the cover body of the waterproof shell are connected into a whole in a vibration friction welding and sealing mode, the welding position has good strength, air tightness and impact resistance, the waterproof effect is improved, and the process is simple and easy to operate.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a waterproof power supply according to an embodiment of the present invention;
FIG. 2 is an exploded view of a waterproof power supply according to an embodiment of the present invention;
FIG. 3 is a schematic view of the inner surface configuration of the cover of FIG. 2;
FIG. 4 is a schematic cross-sectional view of a waterproof power supply according to an embodiment of the invention;
fig. 5 is an enlarged schematic view of a portion a of fig. 4.
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.
As shown in fig. 1-3, the waterproof power supply according to an embodiment of the invention includes a waterproof case, a battery pack 50 disposed in the waterproof case, and a heat conductive silicone 60 sealing the battery pack 50 in the waterproof case.
The waterproof case may include a case 10, a cover 20, a support plate 30, and two output terminals 40. One end of the case 10 is open, and the battery pack 50 is inserted into the case 10 through the open end thereof. The cover 20 is fitted over the open end of the housing 10 to close the open end of the housing 10, forming a closed main housing with the housing 10. The support plate 30 is disposed in the open end of the case 10 between the battery pack 50 and the cover 20 in the case 10. The two output terminals 40 are a positive output terminal and a negative output terminal, respectively, and are electrically connected to the positive electrode tab and the negative electrode tab of the battery pack 50, respectively. The two output terminals 40 are embedded on the outer surface of the housing 10 and spaced apart from each other, and are not connected in an insulated manner for connecting with a host, etc., so that the battery pack 50 is connected and conducted with the host through the output terminals 40.
The outer circumference of the cover 20 is corresponding to the opening of the housing 10, so that the two can be combined to form an integral main housing. The main shell is made of heat-conducting plastics, so that the heat dissipation function is achieved. The thermal conductivity coefficient of the thermal conductive plastic meets 1.0-10W/mK, and further preferably 2.0-5.0W/mK, and the thermal conductive plastic can be determined according to factors such as a battery pack structure, a discharge rate and the thickness of a main shell.
The heat-conducting plastic comprises the following raw materials: a resin matrix, a heat conducting agent, a flame retardant and a reinforcing agent. Alternatively, the resin matrix comprises at least one of PA, PC and ABS; the heat conducting agent comprises AlN, SiC and Al2O3At least one of MgO and ZnO; the reinforcing agent includes glass fibers.
In order to improve the connection sealing performance between the cover 20 and the housing 10, the cover 20 and the housing 10 are provided with concave-convex structures at the opening ends thereof. The cover 20 is fitted to the open end of the housing 10 through a concave-convex structure, and is fixedly connected to the open end of the housing 10 by vibration friction welding, forming a closed main housing with the housing 10.
In this embodiment, the concave-convex structure includes an annular groove 21 provided on the mating end surface of the cover body 20 facing the housing 10, and an annular protrusion 11 provided on the end surface of the open end of the housing 10 corresponding to the annular groove 21. An annular groove 21 extends in the circumferential direction of the cap body 20 on the mating end surface of the cap body 20. When the cover body 20 is covered on the shell body 10, the annular groove 21 is aligned with the annular bulge 11, so that the annular bulge 11 is matched in the annular groove 21, and the cover body 20 and the shell body 10 are buckled; and then the annular bulge 11 and the annular groove 21 are welded together by vibration friction welding, so that the sealing connection between the cover body 20 and the shell body 10 is realized.
Specifically, as shown in fig. 3, two annular glue sites 22 are provided on the mating end surface of the cover 20 facing the housing 10, the two annular glue sites being spaced apart from each other and extending circumferentially around the cover 20. Of the two annular glue sites 22, one annular glue site 22 is positioned at an inner circle of the other annular glue site 22 at intervals. The space between the two annular glue sites 22 forms an annular groove 21. The arrangement of the annular rubber position 22 and the annular bulge 11 can refer to the arrangement mode of the female spigot and the male spigot respectively.
As shown in fig. 4 and 5, in some alternative embodiments, the depth H2 of the annular groove 21 is 1.2mm to 3mm, the height H1 of the annular protrusion 11 is 2mm to 4mm, and the thickness may be 2.0mm to 3.5 mm; the thickness of the annular bulge 11 is smaller than the depth of the annular groove 21, and after the annular bulge 11 is matched in the annular groove 21, a gap is reserved between the two opposite surfaces of the annular bulge 11 and the inner wall surface opposite to the annular groove 21, and the gap can be 0.6-2 mm.
After the annular protrusion 11 is connected to the bottom surface of the annular groove 21, a gap 12 is left between an annular glue position 22 on the outer side of the cover body 20 and the end surface of the opening end of the shell 10, and the width H3 of the gap 12 can be 0.8mm to 1.5 mm. The height H1 of the annular protrusion 11 is greater than the depth H2 of the annular groove 21, and the relationship among H1, H2 and H3 satisfies H1 ═ H2+ H3+0.2 mm.
Further, the cover 20 is provided with reinforcing rib structures 23 spaced along the circumferential direction thereof for increasing the strength of the cover 20 and preventing deformation during vibration friction welding. As shown in fig. 3, the cover 20 includes a cover plate 201 and a side plate 202 surrounding the periphery of the cover plate 201, and the reinforcing rib structure 23 is fixed at the connection of the cover plate and the side plate. The rib structure 23 may be a triangular plate as in fig. 3, but may of course be of other shapes. The annular groove 21 and the annular glue site 22 are both arranged on the end face of the side plate 202 facing the housing 10.
The support plate 30 is disposed in the open end of the case 10, adjacent to the cover 20, for supporting the case 10 to prevent the case 10 from being deformed at the time of vibration friction welding. In the open end of the housing 10, the outer circumference of the support plate 30 is tightly fitted to the inner wall of the housing 10, or the support plate 30 is fixed in the housing 10 by a sealant.
The support plate 30 may be a thermally conductive plastic plate, a steel plate, an aluminum alloy plate, or the like having high strength. The thermally conductive plastic plate may further be an epoxy plate, a PC plate, or the like.
The two output terminals 40 are insulated apart on the outer surface of the housing 10. Each output terminal 40 may be a spring structure, and may be electrically connected to a connection terminal of a device such as a host computer by stable insertion through an elastic force.
The housing 10 may have two spaced slots 12 corresponding to the two output terminals 40, and one output terminal 40 is embedded in one slot 12.
The battery pack 50 is mainly accommodated in a space of the case 10 below the support plate 30, and the heat conductive silicone 60 is filled in the space to seal the battery pack 50.
Referring to fig. 1 to 5, a method for manufacturing a waterproof power supply according to an embodiment of the present invention may include the steps of:
s1, the battery pack 50 is put into the case 10 from the open end of the case 10. The side of the battery pack 50 where the positive electrode tab 61 and the negative electrode tab 62 are provided faces the case side where the output terminal 40 is provided. The positive electrode tab and the negative electrode tab of the battery pack 50 are electrically connected to the two output terminals 40 of the case 10, respectively.
The connection of the positive and negative plates to the two output terminals 40 may be achieved in a plug-in manner or a fitting contact manner.
S2, filling the heat conductive silica gel 60 into the housing 10, and sealing the battery pack 50 in the housing 10 after the heat conductive silica gel 60 is cured.
The thermal conductivity of the poured heat-conducting silica gel 60 is 1.0-5.0W/mK, preferably 1.5-3.0W/mK.
After the heat conductive silicone rubber 60 is cured, the support plate 30 is placed in the open end of the housing 10, glue is applied between the outer periphery of the support plate 30 and the inner wall of the housing 10, and the support plate 30 is fixed in the housing 10.
After the support plate 30 is fixedly coupled to the inner wall of the case 10, the battery pack 50 is enclosed in the inner space of the case 10 below the support plate 30.
S3, the case 10 with the battery pack 50 and the lid 20 are respectively mounted in the lower mold and the upper mold of the vibration friction machine.
And S4, starting the vibration friction machine, matching the cover body 20 to the opening end of the shell 10 and performing vibration friction welding, so that the cover body 20 is sealed and covered on the shell 10, and the waterproof power supply is manufactured.
Wherein, when the cap body 20 is fitted to the open end of the housing 10, the annular groove 21 on the cap body 20 is aligned and fitted with the annular protrusion 11 on the open end of the housing 10.
The waterproof power supply of the invention is subjected to air tightness test, and the result is as follows:
maintaining the pressure at 1.0MPa for 30min, and reducing the pressure by 0; the pressure calculation formula P of water is rho gh, and the waterproof power supply can be safely used at the water depth of 100M.
The air tightness test is carried out after the waterproof power supply is dropped for 6 times at the height of 1m, and the air pressure is reduced by 0, which shows that the welding position through vibration friction welding has good strength and impact resistance.
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 (11)

1. A waterproof casing is used for a waterproof power supply and is characterized by comprising a main casing body made of heat-conducting plastic, wherein the main casing body comprises a casing body with an opening at one end and a cover body matched with the opening end of the casing body;
concave-convex structures matched with each other are arranged on the opening ends of the cover body and the shell body; the cover body is matched with the opening end of the shell through the concave-convex structure and fixedly connected to the opening end of the shell in a vibration friction welding mode to form a closed main shell together with the shell.
2. The waterproof housing of claim 1 wherein said thermally conductive plastic comprises a resin matrix, a thermally conductive agent, a flame retardant, and a reinforcing agent;
the resin matrix comprises at least one of PA, PC and ABS; the heat conducting agent comprises AlN, SiC and Al2O3At least one of MgO and ZnO; the reinforcing agent includes glass fibers.
3. The waterproof case of claim 1, wherein the concave-convex structure comprises an annular groove provided on the mating end surface of the cover facing the case and extending circumferentially along the cover, and an annular protrusion provided on the end surface of the case opening end corresponding to the annular groove;
the annular bulge is matched in the annular groove and connected with the annular groove through vibration friction welding, so that the cover body is connected to the shell in a sealing mode.
4. The waterproof case of claim 3, wherein the mating surface of the cover facing the case is provided with two annular glue sites spaced apart from each other inside and outside and extending circumferentially along the cover, and the annular groove is formed by the spacing between the two annular glue sites.
5. The waterproof case of claim 3, wherein after the annular protrusion is connected to the bottom surface of the annular groove, a gap is left between an annular glue position on the outer side of the cover body and the end surface of the open end of the case body;
the height H1 of the annular protrusion is greater than the depth H2 of the annular groove, H1, H2 and the width H3 of the gap satisfy H1= H2+ H3+0.2 mm.
6. The waterproof housing of claim 1 wherein said cover has reinforcing rib structures spaced circumferentially therein.
7. The watertight casing of any one of claims 1-6, wherein the watertight casing further comprises a support plate disposed within the open end of the housing; and/or the presence of a gas in the gas,
the waterproof shell further comprises two output terminals which are embedded on the outer surface of the shell and are separated.
8. A waterproof power supply comprising the waterproof case according to any one of claims 1 to 7, a battery pack disposed in a case of the waterproof case, and a thermally conductive silica gel encapsulating the battery pack in the waterproof case.
9. The water resistant power supply of claim 8 wherein the support plate of the water resistant housing overlies the battery pack between the battery pack and the cover;
and the positive plate and the negative plate of the battery pack are respectively and electrically connected with the positive terminal and the negative terminal on the waterproof shell.
10. A method of manufacturing a water-resistant power supply as claimed in claim 8 or 9, comprising the steps of:
s1, placing the battery pack into the shell from the opening end of the shell, and electrically connecting the positive plate and the negative plate of the battery pack with the two output terminals on the shell respectively;
s2, pouring heat-conducting silica gel into the shell, and sealing and fixing the battery in the shell after the heat-conducting silica gel is solidified;
s3, respectively installing the shell and the cover body provided with the battery pack into a lower die and an upper die of a vibration friction machine;
and S4, starting the vibration friction machine, matching the cover body to the opening end of the shell body and performing vibration friction welding to obtain the waterproof power supply.
11. The method of claim 10, wherein in step S2, after the thermal silica gel is cured, a support plate is placed in the open end of the housing, and glue is applied between the outer periphery of the support plate and the inner wall of the housing to fix the support plate in the housing.
CN201910477333.6A 2019-06-03 2019-06-03 Waterproof housing, waterproof power supply and manufacturing method thereof Pending CN112038509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910477333.6A CN112038509A (en) 2019-06-03 2019-06-03 Waterproof housing, waterproof power supply and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910477333.6A CN112038509A (en) 2019-06-03 2019-06-03 Waterproof housing, waterproof power supply and manufacturing method thereof

Publications (1)

Publication Number Publication Date
CN112038509A true CN112038509A (en) 2020-12-04

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Application Number Title Priority Date Filing Date
CN201910477333.6A Pending CN112038509A (en) 2019-06-03 2019-06-03 Waterproof housing, waterproof power supply and manufacturing method thereof

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112672613A (en) * 2020-12-29 2021-04-16 深圳市依卓尔能源有限公司 Power supply with waterproof and heat dissipation functions and manufacturing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112672613A (en) * 2020-12-29 2021-04-16 深圳市依卓尔能源有限公司 Power supply with waterproof and heat dissipation functions and manufacturing method thereof

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