CN111197944B - Cooling device - Google Patents
Cooling device Download PDFInfo
- Publication number
- CN111197944B CN111197944B CN201911133143.9A CN201911133143A CN111197944B CN 111197944 B CN111197944 B CN 111197944B CN 201911133143 A CN201911133143 A CN 201911133143A CN 111197944 B CN111197944 B CN 111197944B
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- Prior art keywords
- main body
- holding member
- potential
- cooling device
- joined
- Prior art date
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- 238000001816 cooling Methods 0.000 title claims abstract description 37
- 238000003466 welding Methods 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 66
- 229910052782 aluminium Inorganic materials 0.000 claims description 40
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 40
- 229910000838 Al alloy Inorganic materials 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 239000002826 coolant Substances 0.000 description 15
- 229910045601 alloy Inorganic materials 0.000 description 14
- 239000000956 alloy Substances 0.000 description 14
- 230000001678 irradiating effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000005219 brazing Methods 0.000 description 4
- 238000005304 joining Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/244—Overlap seam welding
-
- 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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/14—Heat exchangers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
-
- 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
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Laser Beam Processing (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
Provided is a cooling device which can make corrosion of a molten portion formed by laser welding difficult. A cooling device is characterized by comprising: a main body having a flow passage through which a liquid flows; and a member to be joined, which is joined by laser welding in a state of being superimposed on the main body, wherein the potential of a molten portion formed by laser welding is higher than the potential of the main body or the member to be joined.
Description
Technical Field
The present invention relates to a cooling device.
Background
In recent years, in a cooling device composed of members formed of an aluminum material such as aluminum or an aluminum alloy, there has been proposed a method of performing soldering or brazing in order to join members formed of an aluminum material to each other.
For example, the liquid-cooled cooling device described in patent document 1 is configured by brazing an aluminum inlet header to one end surface of an inflow portion of a coolant flow body, and similarly brazing an aluminum outlet header to one end surface of an outflow portion, and brazing an aluminum intermediate header to the other end surface of the coolant flow body.
Further, as a method for joining members formed using an aluminum material, patent document 2 proposes performing laser welding.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open publication 2016-161158
Patent document 2: japanese patent laid-open No. 4-270088
Disclosure of Invention
For example, it is conceivable to overlap and join a member formed of an aluminum material (hereinafter, sometimes referred to as "aluminum material") having a flow passage through which a liquid flows with an aluminum material for circulating the liquid in a direction different from the flow direction of the flow passage by laser welding. In this configuration, it is conceivable that the liquid enters the welded portion formed by laser welding through the gap between the aluminum materials, and therefore it is important to suppress corrosion of the melted portion.
The purpose of the present invention is to provide a cooling device that can make corrosion of a molten portion formed by laser welding difficult.
The present invention has been made in view of the above-described object, and is characterized by comprising a main body having a flow passage through which a liquid flows therein, and a member to be joined by laser welding in a state of being superimposed on the main body, wherein a potential of a molten portion formed by the laser welding is higher than a potential of the main body or the member to be joined.
Here, too, it is possible to: and irradiating the joined member with laser light, wherein the potential of the melting portion is higher than the potential of the main body.
In addition, it is also possible to: the main body is formed with a communication hole for communicating the outside with the flow passage, and the member to be joined is overlapped with the main body so as to cover the communication hole, and laser light is irradiated around the communication hole.
In addition, the electric potential of the joined member may be higher than the electric potential of the main body.
In addition, it is also possible to: the material of the main body is 6000 series aluminum alloy, and the material of the member to be joined is 3000 series aluminum alloy.
In another aspect, the present invention provides a cooling device configured by joining two aluminum materials having different materials by laser welding in a state of being overlapped, wherein a potential of a molten portion formed by the laser welding is higher than a potential of one of the two aluminum materials.
Here, too, it is possible to: the material of one of the two aluminum materials is 6000 series aluminum alloy, and the material of the other aluminum material is 3000 series aluminum alloy.
According to the present invention, a cooling device that can make corrosion of a molten portion formed by laser welding difficult can be provided.
Drawings
Fig. 1 is a perspective view of a liquid-cooled cooling device according to an embodiment.
Fig. 2 is an exploded view of components constituting the liquid-cooled cooling device.
Fig. 3 is a cross-sectional view of section III-III of fig. 1.
Fig. 4 is a cross-sectional view of section IV-IV of fig. 1.
Fig. 5 is a perspective view illustrating a laser welding process of the overlapping portion.
Fig. 6 (a) is a sectional view of the VI-VI portion in fig. 1, and (b) is an enlarged view of the VIb portion in (a).
Description of the reference numerals
A 1 … liquid-cooled cooling device, a 10 … device body, a 10h … heat affected zone, a 20 … change member, a 30 … inlet fitting, a 31 … inlet tube, a 32 … holding member, a 32h … heat affected zone, a 34 … weld, a 34m … melt, a 34h … heat affected zone, a 40 … outlet fitting, a 41 … outlet tube, a 42 … holding member.
Detailed Description
Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.
Fig. 1 is a perspective view of a liquid-cooled cooling device 1 according to an embodiment.
Fig. 2 is an exploded view of the components constituting the liquid-cooled cooling device 1.
Fig. 3 is a cross-sectional view of section III-III of fig. 1.
Fig. 4 is a cross-sectional view of section IV-IV of fig. 1.
The liquid-cooled cooling device 1 according to the embodiment includes a device main body 10 through which a coolant flows, and a changing member 20 that changes the flow direction of the coolant flowing through the device main body 10. The liquid-cooled cooling device 1 includes an inlet joint 30 for allowing the coolant to flow from the outside of the device body 10 to the inside, and an outlet joint 40 for allowing the coolant to flow from the inside of the device body 10 to the outside.
(Device body 10)
The apparatus main body 10 is a member having a substantially rectangular parallelepiped shape. The apparatus body 10 is formed using an extrusion material of JIS a6063 alloy formed by extrusion processing, and is formed such that the extrusion direction becomes the longitudinal direction. As shown in fig. 1, the length in the longitudinal direction and the width direction of the apparatus main body 10 is longer than the length in the vertical direction. The material type of JIS A6063 alloy is exemplified by T0 and T6. Other material types may be used, but the hardness of the device body 10 is preferably 42 (HV (vickers hardness)) or more.
A plurality of through holes 11 penetrating from one end to the other end in the longitudinal direction are formed in the device body 10. In the liquid-cooled cooling device 1 according to the present embodiment, as shown in fig. 4, six through holes 11 are formed at a position closer to the front side than the center portion in the width direction and at a position closer to the rear side than the center portion.
The six through holes 11 on the near side function as inflow side channels 111 through which the coolant flows in through the inlet joint 30 and flows before reaching the changing member 20. Adjacent inflow side passages 111 are partitioned by inflow side walls 111 a.
On the other hand, the six inner through holes 11 function as outflow-side passages 112 through which the coolant flows after passing through the changing member 20 and before reaching the outlet joint 40. Adjacent outflow side channels 112 are separated by outflow side walls 112 a.
In the device main body 10, two spaces 12 recessed from the upper surface are formed at the central portion in the longitudinal direction. One of the two spaces 12 is an inflow space 121 formed so as to communicate with the inflow channel 111, and the other is an outflow space 122 formed so as to communicate with the outflow channel 112.
The inflow side space 121 is a space formed by removing the upper wall 13 and the inflow side wall 111a by, for example, cutting, and is formed by a through hole 121a penetrating the upper wall 13 and a lower space 121b from which the inflow side wall 111a is removed. In the example shown in fig. 2, the inflow side wall 111a is entirely removed from the upper side to the lower side, but a part of the upper side may be removed and a part of the side may remain.
The outflow side space 122 is a space formed by removing the upper wall 13 and the outflow side wall 112a by, for example, cutting, and is formed by a through hole 122a penetrating the upper wall 13 and a lower space 122b from which the outflow side wall 112a is removed. In the example shown in fig. 2, the outflow side wall 112a is entirely removed from the upper side to the lower side, but a part of the upper side may be removed and a part of the side may remain.
(Modification member 20)
The changing member 20 is disposed at each of both ends in the longitudinal direction of the apparatus body 10.
The changing member 20 is a member having a substantially rectangular parallelepiped shape, and has a recess 21 recessed from an end surface on the device body 10 side. The inflow side flow path 111 and the outflow side flow path 112 communicate with each other through the concave portion 21.
The changing member 20 is joined by performing laser welding to the butt portion in a state where the end surface on the apparatus body 10 side is in butt joint with the end surface in the longitudinal direction of the apparatus body 10. In this way, the changing member 20 is an example of a member to be joined to the apparatus main body 10 as an example of a main body by laser welding.
The modified member 20 is exemplified by a member formed by subjecting a strip made of a JIS a3000 alloy having a material type O to deep drawing. The modification member 20 may be formed by cutting a material made of, for example, a JIS a3000 alloy having a material type H14 or JIS a1000 aluminum having a material type H14.
(Inlet fitting 30)
The inlet joint 30 includes an inlet pipe 31 and a holding member 32 for holding the inlet pipe 31, and the inlet pipe 31 is cylindrical and is disposed so that the center line direction is in the up-down direction.
The inlet pipe 31 has an upper end side protruding portion 311 provided at a portion near the upper end and protruding radially outward over the entire circumference, and a lower end side protruding portion 312 provided at a portion near the lower end and protruding radially outward over the entire circumference.
The portion of the inlet pipe 31 on the lower end side of the lower end side protruding portion 312 is inserted into a through hole 321 formed in the holding member 32, which will be described later.
The holding member 32 is a substantially plate-shaped rectangular parallelepiped member, and has a circular through hole 321 formed in the center. The holding member 32 is formed using a plate of JIS a3003 alloy. The material type of the JIS a3003 alloy may be exemplified by the material type H12 or the material type H18. Although other material types are possible, the hardness of the holding member 32 is preferably 35 (HV) or more.
The portion of the inlet pipe 31 on the lower end side than the lower end side protruding portion 312 is brazed in a state of being inserted into the through hole 321 formed in the holding member 32. A fillet 33 made of molten solder is formed between the outermost diameter of the lower end side protruding portion 312 and the holding member 32.
The inlet joint 30 is joined by performing laser welding in a state where the lower end portion of the inlet pipe 31 is inserted into the inflow side space 121 of the apparatus main body 10 and the lower end surface of the holding member 32 is placed on the upper surface of the apparatus main body 10 (a state where the holding member 32 and the apparatus main body 10 are overlapped). As described above, the holding member 32 is an example of a member to be joined to the apparatus body 10 by laser welding.
(Outlet fitting 40)
The outlet joint 40 is similar to the inlet joint 30, and includes an outlet pipe 41 and a holding member 42 for holding the outlet pipe 41, wherein the outlet pipe 41 is cylindrical and is disposed so that the center line direction is in the up-down direction.
The outlet pipe 41 has an upper end side protruding portion 411 and a lower end side protruding portion 412, the upper end side protruding portion 411 being provided at a portion near the upper end and protruding radially outward over the entire circumference, and the lower end side protruding portion 412 being provided at a portion near the lower end and protruding radially outward over the entire circumference.
A portion of the outlet pipe 41 on the lower end side of the lower end side protruding portion 412 is inserted into a through hole (not shown) formed in the holding member 42.
The holding member 42 is a substantially plate-shaped rectangular parallelepiped member, and has a circular through hole (not shown) formed in the center thereof. The holding member 42 is formed using a plate material of JIS a3003 alloy in the same manner as the holding member 32. The material type of the JIS a3003 alloy may be exemplified by the material type H12 or the material type H18. Although other material types are possible, the hardness of the holding member 42 is preferably 35 (HV) or more.
The outlet pipe 41 is brazed in a state in which a portion on the lower end side of the lower end side protruding portion 412 is inserted into a through hole (not shown) formed in the holding member 42. A fillet 43 made of molten solder is formed between the outermost diameter of the lower end side projection 412 and the holding member 42.
The outlet joint 40 is joined by performing laser welding in a state where the lower end portion of the outlet pipe 41 is inserted into the outflow side space 122 of the apparatus main body 10 and the lower end surface of the holding member 42 is placed on the upper surface of the apparatus main body 10 (a state where the holding member 42 and the apparatus main body 10 are overlapped). As described above, the holding member 42 is an example of a member to be joined to the apparatus body 10 by laser welding.
(Action of liquid-cooled Cooling device 1)
In the liquid-cooled cooling device 1 configured as described above, the object to be cooled by the liquid-cooled cooling device 1 is placed on the upper surface of the device body 10 at a position on the outer side in the longitudinal direction than the position where the inlet joint 30 and the outlet joint 40 are provided. The object to be cooled may be exemplified as a battery pack 100 constituted by a plurality of rectangular parallelepiped single cells 101.
In the liquid-cooled cooling device 1, the coolant flowing into the inflow space 121 of the device body 10 from the inlet pipe 31 of the inlet joint 30 reaches the recess 21 of the changing member 20 through the inflow-side flow path 111. The coolant that has reached the recess 21 of the changing member 20 then reaches the outflow space 122 through the outflow-side flow path 112, and flows out from the outlet pipe 41 of the outlet joint 40. In this way, while the coolant flows through the inflow side flow path 111 and the outflow side flow path 112 of the device body 10, the assembled battery 100 mounted on the upper surface of the device body 10 is cooled.
(Method for manufacturing liquid-cooled Cooling device 1)
The liquid-cooled cooling device 1 having the above-described structure is manufactured as follows.
The laser light is continuously irradiated to the abutting portion in a state where the end surfaces of the both end portions in the longitudinal direction of the device body 10 are abutted against the end surface of the changing member 20 on the device body 10 side. In this way, the changing member 20 is joined to both ends of the device body 10 in the longitudinal direction by laser welding.
By irradiating the butt portion with laser light, the welded portion 22 is formed at substantially the same position as the butt portion (see fig. 3).
The lower end of the inlet pipe 31 of the inlet joint 30 is inserted into the inflow space 121 of the apparatus main body 10, and the lower end surface of the holding member 32 of the inlet joint 30 is placed on the upper surface of the apparatus main body 10 (the holding member 32 and the apparatus main body 10 are overlapped). Then, in a state where the holding member 32 and the apparatus main body 10 are overlapped, the holding member 32 is irradiated with laser light, and the periphery of the inlet pipe 31 is continuously irradiated with laser light. In this way, the inlet joint 30 is joined to the central portion of the apparatus body 10 by laser welding.
By irradiating the overlapping portion with laser light, a welded portion 34 is formed at substantially the same position as the irradiated position (see fig. 3).
Similarly, the lower end portion of the outlet pipe 41 of the outlet joint 40 is inserted into the outflow space 122 of the apparatus main body 10, and the lower end surface of the holding member 42 of the outlet joint 40 is placed on the upper surface of the apparatus main body 10 (the holding member 42 and the apparatus main body 10 are overlapped). Then, in a state where the holding member 42 and the apparatus main body 10 are overlapped, the holding member 42 is irradiated with laser light, and the periphery of the outlet pipe 41 is continuously irradiated with laser light. In this way, the outlet joint 40 is joined to the central portion of the apparatus body 10 by laser welding.
By irradiating the overlapping portion with laser light, a welded portion 44 is formed at substantially the same position as the irradiated position (see fig. 1).
(Laser welding Process)
Fig. 5 is a perspective view illustrating a laser welding process of the overlapping portion.
As shown in fig. 5, laser light L is irradiated from a laser head 151 of the laser device 150 onto an overlapping portion of the device body 10 and the holding member 32 of the inlet joint 30 (the holding member 42 of the outlet joint 40). The laser head 151 is moved along the end shape of the holding member 32 (holding member 42) around the inlet pipe 31 (outlet pipe 41), whereby the laser beam L is continuously irradiated.
The laser source of the laser device 150 is not particularly limited. Examples of the laser include a YAG laser, a CO 2 laser, a fiber laser, a disk laser, and a semiconductor laser. The irradiation direction of the laser beam L may be a direction perpendicular to the surface of the holding member 32 (holding member 42) at the overlapping portion, or may be a direction inclined with respect to the perpendicular direction.
The laser beam L is irradiated from the laser head 151 to the abutting portion of the device body 10 and the changing member 20. The laser beam L is continuously irradiated by moving the laser head 151 along the shape of the butt portion.
(Weld portion)
Fig. 6 (a) is a sectional view of the VI-VI portion of fig. 1. Fig. 6 (b) is an enlarged view of the VIb portion of fig. 6 (a).
Fig. 6 (a) and 6 (b) show the cross-sectional shape of the welded portion 34 of the overlapping portion of the holding member 32 of the inlet joint 30 and the apparatus main body 10. When the holding member 32 is irradiated with the laser light L from the laser head 151 of the laser device 150, the energy of the laser light L is converted into heat, and the holding member 32, which is an aluminum material, constituting the overlapping portion and the base material itself of the device body 10 are melted and then rapidly cooled. The rapid heating and rapid cooling cause a structural change in the welded portion 34, and the welded portion 34 includes a molten portion 34m that is melted and solidified and a heat affected zone 34h that causes a structural change due to welding heat. The heat-affected zone 34h is constituted by the heat-affected zone 32h of the holding member 32 and the heat-affected zone 10h of the apparatus body 10.
In the liquid-cooled cooling device 1 manufactured as described above, the aluminum material used for the device body 10 is different from the aluminum material used for the holding member 32 of the inlet joint 30 and the holding member 42 of the outlet joint 40.
As a result of intensive studies, the inventors of the present invention have found that when two aluminum materials different in material are joined by laser welding, the potential of a molten portion formed by laser welding is higher than the potential of one of the two aluminum materials. The potential of the one of the two aluminum materials having different materials, which is lower, the potential of the melting portion, and the potential of the one of the two aluminum materials having higher potential become higher in this order. In the liquid-cooled cooling device 1, the electric potential of the melted portion 34m formed by laser welding the aluminum material of the device body 10 and the aluminum material of the holding member 32 (holding member 42) is made to be not lowest.
In the liquid-cooled cooling device 1 according to the present embodiment, when the aluminum material of the device body 10 and the aluminum material of the holding member 32 (holding member 42) are selected, the following aspects are considered: the apparatus body 10 has an inflow side flow path 111 and an outflow side flow path 112 inside, and the holding member 32 (holding member 42) covers the inflow side space 121 (outflow side space 122). The holding member 32 is overlapped on the device body 10 so as to cover a through hole 121a formed in the device body 10 as an example of a communication hole that communicates the outside of the device body 10 with the inflow side flow path 111, and irradiates the periphery of the through hole 121a with laser light. The holding member 42 is overlapped on the device body 10 so as to cover a through hole 122a formed in the device body 10 as an example of a communication hole that communicates the outside of the device body 10 with the outflow side flow path 112, and irradiates the periphery of the through hole 122a with laser light.
In the liquid-cooled cooling device 1 according to the present embodiment, the aluminum material of the holding member 32 (holding member 42) is a JIS a3000 alloy, and the aluminum material of the device body 10 is a JIS a6000 alloy having a lower potential than the holding member 32 (holding member 42). More specifically, the aluminum material of the holding member 32 (holding member 42) was defined as JIS A3003 alloy, the aluminum material of the apparatus main body 10 was defined as JIS A6063 alloy (the potential of JIS A3003 alloy was-719.3 (mV), and the potential of JIS A6063 alloy was-742.3 (mV)).
Thus, the potential of the melted portion (for example, melted portion 34 m) formed by laser welding is made higher than the potential of the apparatus main body 10, and the potential of the holding member 32 (holding member 42) is made higher than the potential of the apparatus main body 10. That is, the potential increases in the order of the potential of the apparatus main body 10, the potential of the melted portion (for example, the melted portion 34 m), and the potential of the holding member 32 (the holding member 42). As a result, even if the coolant enters between the apparatus main body 10 and the holding member 32 (holding member 42), the molten portion (for example, the molten portion 34 m) can be suppressed from becoming a metal that is easily oxidized, and corrosion of the molten portion can be suppressed. In addition, the holding member 32 (holding member 42) can be suppressed from becoming a metal that is easily oxidized, and corrosion of the molten portion can be suppressed.
In contrast, since the potential of the apparatus main body 10 is lower than the potential of the melted portion (for example, the melted portion 34 m) and the potential of the holding member 32 (the holding member 42), when the coolant enters between the apparatus main body 10 and the holding member 32 (the holding member 42), the apparatus main body 10 becomes a metal that is easily oxidized, and there is a possibility that the apparatus main body 10 corrodes. However, even if the portion of the apparatus main body 10 located inside the melted portion 34m corrodes, the holding member 32 is overlapped on the apparatus main body 10 so as to cover the through hole 121a formed in the apparatus main body 10, and the melted portion 34m is formed by irradiating the periphery of the through hole 121a with laser light, so that leakage of the coolant to the outside of the apparatus main body 10 can be suppressed. Further, since the holding member 42 is overlapped on the apparatus main body 10 so as to cover the through hole 122a formed in the apparatus main body 10, and the melted portion is formed by irradiating the periphery of the through hole 122a with laser light, leakage of the coolant to the outside of the apparatus main body 10 can be suppressed.
As described above, the liquid cooling apparatus 1 according to the present embodiment is an example of a cooling apparatus configured by joining two aluminum materials different in material by laser welding in a state of being overlapped, and is characterized in that the potential of a molten portion formed by laser welding is higher than the potential of one of the two aluminum materials. However, the potential of the molten portion formed by laser welding, which is the characteristic point, is higher than that of one of the aluminum materials, and is not limited to the cooling device. Is suitable for all structures formed by joining two aluminum materials by laser welding. Further, by forming the molten portion by laser welding to have a potential higher than that of one of the two aluminum materials, the molten portion becomes less likely to corrode.
Claims (5)
1. A cooling device is characterized by comprising:
a main body having a flow passage through which a liquid flows; and
A joined member joined by laser welding in a state of being superimposed on the main body,
The potential of the melted portion formed by the laser welding is higher than the potential of the main body or the joined member,
The main body and the engaged member are each composed of a single material,
The material of the main body is 6000 series aluminum alloy, and the material of the member to be joined is 3000 series aluminum alloy.
2. The cooling device according to claim 1,
The joined member is irradiated with a laser,
The potential of the melting portion is higher than the potential of the body.
3. The cooling device according to claim 2,
A communication hole for communicating the outside with the flow passage is formed in the main body,
The engaged member is overlapped on the main body in such a manner as to cover the communication hole,
Laser light is irradiated around the communication hole.
4. A cooling device according to claim 3, wherein the electric potential of the joined member is higher than the electric potential of the main body.
5. A cooling device comprising two aluminum materials of different materials joined by laser welding in a state of being overlapped, characterized in that the potential of a molten part formed by the laser welding is higher than the potential of one of the two aluminum materials,
The material of one of the two aluminum materials is 6000 series aluminum alloy, and the material of the other aluminum material is 3000 series aluminum alloy.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-216756 | 2018-11-19 | ||
| JP2018216756A JP7213070B2 (en) | 2018-11-19 | 2018-11-19 | Cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111197944A CN111197944A (en) | 2020-05-26 |
| CN111197944B true CN111197944B (en) | 2024-06-14 |
Family
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| DE19849449A1 (en) * | 1998-10-28 | 2000-05-04 | Hanf Carl Elino Ind Ofenbau | Connecting heat exchange parts used for e.g. water coolers involves using laser welding |
| CN102009325A (en) * | 2010-11-07 | 2011-04-13 | 上海交通大学 | Method for improving corrosion resistance of weld joint of hastelloy conductive roller |
| CN107003095A (en) * | 2014-11-27 | 2017-08-01 | 海德鲁铝业钢材有限公司 | The application of heat exchanger, aluminium alloy and aluminium strip and the production method of aluminium strip |
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| US4665294A (en) * | 1986-03-27 | 1987-05-12 | Westinghouse Electric Corp. | Method of welding aluminum alloys |
| JPH04270088A (en) | 1991-02-19 | 1992-09-25 | Nissan Motor Co Ltd | Laser beam welding method for aluminum materials |
| JPH11245066A (en) * | 1998-03-05 | 1999-09-14 | Toshiba Corp | Laser welding and manufacture of secondary battery |
| JP2000141029A (en) * | 1998-11-04 | 2000-05-23 | Harness Syst Tech Res Ltd | Connecting method by laser |
| ATE431770T1 (en) * | 2004-09-14 | 2009-06-15 | Alcan Rhenalu | WELDED STRUCTURAL ELEMENT COMPRISING AT LEAST TWO ALUMINUM ALLOY PARTS HAVING DIFFERENT METALLURGICAL STATES AND METHOD FOR PRODUCING SUCH ELEMENT |
| JP4880664B2 (en) * | 2007-12-28 | 2012-02-22 | 株式会社神戸製鋼所 | Aluminum alloy material and battery case for pulse laser welding |
| JP5544995B2 (en) * | 2010-04-07 | 2014-07-09 | 株式会社デンソー | Heat exchanger |
| JP5941805B2 (en) * | 2012-09-27 | 2016-06-29 | 株式会社Uacj | How to clean battery cans before sealing |
| JP2014216298A (en) * | 2013-04-30 | 2014-11-17 | 日立オートモティブシステムズ株式会社 | Battery module |
| JP6186239B2 (en) * | 2013-10-15 | 2017-08-23 | 株式会社Uacj | Aluminum alloy heat exchanger |
| JP5847209B2 (en) * | 2014-01-21 | 2016-01-20 | 株式会社神戸製鋼所 | Dissimilar metal joined body and manufacturing method of dissimilar metal joined body |
| JP6513427B2 (en) * | 2015-02-27 | 2019-05-15 | 昭和電工株式会社 | Liquid cooling system |
| US10927869B2 (en) * | 2015-11-05 | 2021-02-23 | Ohio State Innovation Foundation | Welding methods and welded joints for joining high-strength aluminum alloys |
| CN110114181B (en) * | 2016-12-27 | 2021-11-30 | 株式会社神户制钢所 | Arc welding method for joining dissimilar materials, joining auxiliary member, welded joint of dissimilar materials, and plate material with joining auxiliary member |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19849449A1 (en) * | 1998-10-28 | 2000-05-04 | Hanf Carl Elino Ind Ofenbau | Connecting heat exchange parts used for e.g. water coolers involves using laser welding |
| CN102009325A (en) * | 2010-11-07 | 2011-04-13 | 上海交通大学 | Method for improving corrosion resistance of weld joint of hastelloy conductive roller |
| CN107003095A (en) * | 2014-11-27 | 2017-08-01 | 海德鲁铝业钢材有限公司 | The application of heat exchanger, aluminium alloy and aluminium strip and the production method of aluminium strip |
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| DE102019127808A1 (en) | 2020-05-20 |
| JP2020082101A (en) | 2020-06-04 |
| CN111197944A (en) | 2020-05-26 |
| JP7213070B2 (en) | 2023-01-26 |
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