CN113798674A - Welding tool for liquid cooling plate and laser welding method - Google Patents
Welding tool for liquid cooling plate and laser welding method Download PDFInfo
- Publication number
- CN113798674A CN113798674A CN202111145173.9A CN202111145173A CN113798674A CN 113798674 A CN113798674 A CN 113798674A CN 202111145173 A CN202111145173 A CN 202111145173A CN 113798674 A CN113798674 A CN 113798674A
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- Prior art keywords
- welding
- plate
- liquid cooling
- laser
- cooling plate
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- 238000003466 welding Methods 0.000 title claims abstract description 140
- 238000001816 cooling Methods 0.000 title claims abstract description 51
- 239000007788 liquid Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 239000013307 optical fiber Substances 0.000 claims description 8
- 230000035515 penetration Effects 0.000 claims description 8
- 239000004065 semiconductor Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 4
- 230000004907 flux Effects 0.000 abstract description 3
- 238000005476 soldering Methods 0.000 abstract description 3
- 238000005219 brazing Methods 0.000 description 4
- 239000010953 base metal Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Abstract
The invention discloses a welding tool and a laser welding method for a liquid cooling plate, which specifically comprise the following steps: placing a water nozzle of a liquid cooling plate into a clearance hole of a welding lower plate, placing a flat plate into a welding tool for positioning, enabling the hole of the flat plate and the water nozzle to be nested and butted to form a splicing welding line, and carrying out sealing welding through laser welding; step two: placing and positioning a stamping runner plate on a flat plate of the welding water nozzle, and then pressing an upper plate of a welding tool and the stamping runner plate tightly to enable the upper plate and the stamping runner plate to be tightly attached, wherein a gap is kept to be smaller than 0.1 mm; step three: after the liquid cooling plate is placed, the welding laser penetrates through the welding area of the liquid cooling plate through a hollow-out part preset by a welding tool to perform stitch welding, and finally the welding tool is removed to obtain a laser welding finished product of the liquid cooling plate. The invention adopts the laser welding liquid-cooling plate, does not use a composite plate and soldering flux, and the strength of the base material is not changed. Through the integral press mounting of the welding tool, the gap is ensured to be small enough, the thermal deformation is inhibited, and the planeness of the liquid cooling plate is ensured.
Description
Technical Field
The invention relates to the technical field of liquid cooling plate laser welding, in particular to a welding tool and a laser welding method for a liquid cooling plate.
Background
The development of lithium ion power batteries in the field of new energy is vigorous, and the batteries need to be cooled in order to prevent thermal runaway caused by heating of the batteries due to internal resistance. At present, cooling of the square-shell battery is mainly performed through a liquid cooling plate with a flow channel, wherein the liquid cooling plate is sealed through welding an upper plate and a lower plate.
The traditional sealing of the upper plate and the lower plate of the liquid cooling plate adopts a mode of furnace brazing. In order to ensure the welding reliability, a brazing material is plated on the surface of the base metal, and the whole welding surface is sprayed with the scaling powder before welding. Because the brazing in the furnace is to heat the whole cold plate, the base metal is annealed during brazing, so that the strength of the welded base metal is reduced. And the soldering flux in the cold plate is difficult to clean up after welding, so that the inside of the cold plate is corroded, and the service life of the cold plate is influenced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and adopts a welding tool and a laser welding method for a liquid cooling plate to solve the problems in the background technology.
A welding tool for a liquid cooling plate and a laser welding method are provided, wherein the welding tool comprises an upper plate and a lower plate;
the upper plate comprises an upper main plate and a welding clearance groove which is arranged on the upper main plate and used for laser penetration;
the lower plate comprises a lower main plate, a positioning sinking platform arranged on the lower main plate and used for positioning the liquid cooling plate, and a clearance hole used for avoiding;
the laser welding method comprises the following specific steps:
the method comprises the following steps: placing a water nozzle of a liquid cooling plate into a clearance hole of a welding lower plate, then placing a flat plate of the liquid cooling plate into a positioning sinking platform of a welding tool for positioning, enabling the hole of the flat plate and the water nozzle to be nested and butted to form a splicing welding line, and carrying out sealing welding through laser welding;
step two: placing and positioning a stamping runner plate on a flat plate of the welded water nozzle, and then pressing the stamping runner plate by an upper plate of a welding tool to enable the stamping runner plate to be tightly attached, wherein the gap is kept to be less than 0.1 mm;
step three: after the liquid cooling plate is placed, the welding laser penetrates through the welding area of the liquid cooling plate through a hollow-out part preset by a welding tool to perform stitch welding, and finally the welding tool is removed to obtain a laser welding finished product of the liquid cooling plate.
As a further aspect of the invention: the light source of the laser welding adopts optical fiber laser and/or optical fiber and semiconductor composite laser.
As a further aspect of the invention: the welding tool adopts integral press fitting.
As a further aspect of the invention: the upper plate and the lower plate are provided with locking holes for locking and positioning pin holes for positioning.
As a further aspect of the invention: and the outermost side of the liquid cooling plate is sealed and welded in a multi-pass welding mode.
Compared with the prior art, the invention has the following technical effects:
through adopting foretell technical scheme, utilize the welding frock that sets up in advance, place the flat board of liquid cooling board in the lower mainboard of welding frock and carry out laser water injection well choke welding. And then the stamping runner plate is put in, and the components such as the nut, the positioning pin and the like are utilized to further compress and position. And then welding the positions provided with the welding clearance grooves and the holes by utilizing different types of laser welding modes. Through the design scheme, the composite board and the soldering flux are not needed in welding, and the strength of the base material can be kept. The welding areas can be positioned on the same plane by adopting an integral press-fitting mode, so that the welding penetration is consistent, and the quality of a welding seam is reliable. And all welding areas are pressed and mounted simultaneously, so that the welding speed can be obviously improved, and the welding efficiency is improved.
Drawings
The following detailed description of embodiments of the invention refers to the accompanying drawings in which:
FIG. 1 is a schematic illustration of steps of a liquid-cooled plate laser welding method according to some embodiments disclosed herein;
FIG. 2 is a schematic cross-sectional view of a cold plate weld press-fit arrangement according to some embodiments of the present disclosure;
FIG. 3 is a schematic view of a liquid cooling plate structure according to some embodiments of the present disclosure;
FIG. 4 is a schematic view of a stamped runner plate and a flat plate after welding according to some embodiments disclosed herein;
FIG. 5 is a schematic view of an upper plate of a welding tool of some embodiments of the present disclosure;
fig. 6 is a schematic view of a lower plate of a welding tool of some embodiments disclosed herein.
In the figure: 1. a liquid-cooled plate; 11. a flat plate; 12. stamping the runner plate; 2. welding a tool; 21. an upper plate; 211. an upper main board; 212. welding the clearance groove; 213. a locking hole; 214. a positioning pin hole; 22. a lower plate; 221. a lower main board; 222. positioning the sinking platform; 223. avoiding a void; 3. a coolant flow passage; 4. and a cooling liquid inlet and outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, in an embodiment of the present invention, a welding tool for a liquid cooling plate includes an upper plate and a lower plate;
the upper plate comprises an upper main plate and a welding clearance groove which is arranged on the upper main plate and used for laser penetration;
the lower plate comprises a lower main plate, a positioning sinking platform arranged on the lower main plate and used for positioning the liquid cooling plate, and a clearance hole used for avoiding;
in a specific embodiment, as shown in fig. 5 and 6, the welding tool 2 includes an upper plate 21 and a lower plate 22.
Specifically, the upper plate 21 includes an upper main plate 211, a welding clearance groove 212 for laser to penetrate through a welding liquid-cooled plate, a locking hole 213 for locking, and a positioning pin hole 214 for positioning.
Specifically, the lower plate 22 includes a lower main plate 221, a positioning sink 222 for positioning the upper and lower punching flow path plates 12 and the flat plate 11 of the liquid-cooling plate 1, and a clearance hole 223 for facilitating laser penetration.
The laser welding method comprises the following specific steps:
in the present embodiment, the main purpose of welding is to weld the ram flow path plate 12 and the flat plate 11 together by stitch welding to achieve sealing.
The method comprises the following steps: firstly, placing a liquid cooling plate 1 into a clearance hole 223 of a welding lower plate 22, then placing a flat plate 11 of the liquid cooling plate 1 into a welding tool 2 for positioning, enabling the hole of the flat plate 11 and a water nozzle to be nested and butted to form a splicing welding line, and carrying out sealing welding through laser welding;
step two: placing and positioning a stamping runner plate 12 on a flat plate 11 of the welding water nozzle, and then pressing the stamping runner plate 12 by an upper plate 21 of a welding tool 2 to enable the stamping runner plate to be tightly attached, wherein a gap is kept to be smaller than 0.1 mm;
specifically, under the effect of the welding tool, the welding gap can be ensured to be small enough, the thermal deformation can be inhibited in the welding process, and the flatness of the cold plate is improved.
Step three: after the liquid cooling plate 1 is placed, the welding laser penetrates through the welding area of the liquid cooling plate 1 through the hollow part preset in the welding tool 2 to perform stitch welding, and finally the welding tool 2 is removed to obtain a laser welding finished product of the liquid cooling plate 1.
In the specific embodiment, the material of the liquid cooling plate 1 can be selected from different types and different thicknesses according to requirements. The light source of the laser welding adopts optical fiber laser and/or optical fiber and semiconductor composite laser.
Specific examples are as follows:
when the liquid cooling plate 1 is made of 5 series aluminum alloy, the 0.6mm punching runner plate 12 is matched with the 1.0mm flat plate 11 for stitch welding, and the laser type is composite laser of optical fiber and semiconductor.
Laser power: optical fiber 700w, semiconductor 800 w;
welding speed: 80mm/s
Defocus amount: +1.5mm
Protective gas flow: 10L/min
The surface of the welding seam is smooth, the penetration depth of the lower plate 22 is 0.6mm, the welding seam is not welded through, the strength of the welding seam is enough, and the sealing performance is good.
When the liquid cooling plate 1 is made of 6-series aluminum alloy and the 1.0mm stamping runner plate 12 is matched with the 1.0mm flat plate 11 for stitch welding, the laser type is single-fiber laser.
Laser power: 1500w
Welding speed: 100mm/s
Defocus amount: +2.0mm
Protective gas flow: 30L/min
The surface of the welding seam is relatively smooth, the penetration of the lower plate 22 is 0.5mm, the strength of the welding seam is enough, and the sealing performance is good.
As shown in fig. 3, the liquid cooling plate 1 is schematically shown in structure, and includes a ram flow channel plate 12 and a flat plate 11, the ram flow channel plate 12 is provided with a coolant flow channel 3, and the flat plate 11 is provided with a coolant inlet and outlet 4.
In a specific embodiment, the welding tool 2 adopts an integral press-fitting method. The welding areas are positioned on the same plane, so that the welding penetration is consistent, and the quality of the welding seam is reliable. And all welding areas are pressed and mounted simultaneously, so that the welding speed can be obviously improved, and the welding efficiency is improved.
In a specific embodiment, as shown in fig. 4, the outermost sealing welding of the liquid cooling plate 1 adopts a multi-pass welding mode for sufficiently ensuring air tightness.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents, which should be construed as being within the scope of the invention.
Claims (5)
1. A welding tool and a laser welding method for a liquid cooling plate are characterized in that the welding tool (2) comprises an upper plate (21) and a lower plate (22);
the upper plate comprises an upper main plate (211) and a welding clearance groove (212) which is arranged on the upper main plate and used for laser penetration;
the lower plate comprises a lower main plate (221), a positioning sinking platform (222) arranged on the lower main plate and used for positioning the liquid cooling plate, and a clearance hole (223) used for avoiding;
the laser welding method comprises the following specific steps:
the method comprises the following steps: placing a water nozzle of the liquid cooling plate (1) into a clearance hole of a welding lower plate, placing a flat plate (11) of the liquid cooling plate into a positioning sinking platform of a welding tool for positioning, enabling the hole of the flat plate and the water nozzle to be nested and butted to form a splicing welding line, and carrying out sealing welding through laser welding;
step two: placing and positioning a stamping runner plate (12) on a flat plate of the welded water nozzle, and then pressing the stamping runner plate by an upper plate of a welding tool to enable the stamping runner plate to be tightly attached, wherein the gap is kept to be less than 0.1 mm;
step three: after the liquid cooling plate is placed, the welding laser penetrates through the welding area of the liquid cooling plate through a hollow-out part preset by a welding tool to perform stitch welding, and finally the welding tool is removed to obtain a laser welding finished product of the liquid cooling plate.
2. The welding tool and the laser welding method for the liquid cooling plate according to claim 1, wherein a light source of the laser welding is an optical fiber laser and/or an optical fiber and semiconductor composite laser.
3. The welding tool and the laser welding method for the liquid cooling plate according to claim 1, wherein the welding tool is integrally press-fitted.
4. The welding tool and the laser welding method for the liquid cooling plate are characterized in that the upper plate and the lower plate are provided with locking holes (213) for locking and positioning pin holes (214) for positioning.
5. The welding tool and the laser welding method for the liquid cooling plate are characterized in that the outermost side of the liquid cooling plate is sealed and welded in a multi-pass mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111145173.9A CN113798674A (en) | 2021-09-28 | 2021-09-28 | Welding tool for liquid cooling plate and laser welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111145173.9A CN113798674A (en) | 2021-09-28 | 2021-09-28 | Welding tool for liquid cooling plate and laser welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113798674A true CN113798674A (en) | 2021-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111145173.9A Pending CN113798674A (en) | 2021-09-28 | 2021-09-28 | Welding tool for liquid cooling plate and laser welding method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10339972A1 (en) * | 2003-08-29 | 2005-03-24 | Daimlerchrysler Ag | Microfluidic component used as micro heat exchanger in fuel cell system comprises two flat metallic components connected together in a gas-tight manner using laser welding and having structures for guiding fluids |
| CN110545946A (en) * | 2017-02-16 | 2019-12-06 | 莱茵兹密封垫有限公司 | Cooling plate and method for manufacturing same |
| CN111531336A (en) * | 2020-06-04 | 2020-08-14 | 浙江银轮机械股份有限公司 | Water-cooling plate production method |
| CN111629888A (en) * | 2018-02-05 | 2020-09-04 | 易沃斯激光系统股份有限公司 | Clamping device and related laser welding equipment |
| CN112247354A (en) * | 2020-10-14 | 2021-01-22 | 浙江银轮机械股份有限公司 | Water cooling plate production process and water cooling plate welding device |
-
2021
- 2021-09-28 CN CN202111145173.9A patent/CN113798674A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10339972A1 (en) * | 2003-08-29 | 2005-03-24 | Daimlerchrysler Ag | Microfluidic component used as micro heat exchanger in fuel cell system comprises two flat metallic components connected together in a gas-tight manner using laser welding and having structures for guiding fluids |
| CN110545946A (en) * | 2017-02-16 | 2019-12-06 | 莱茵兹密封垫有限公司 | Cooling plate and method for manufacturing same |
| CN111629888A (en) * | 2018-02-05 | 2020-09-04 | 易沃斯激光系统股份有限公司 | Clamping device and related laser welding equipment |
| CN111531336A (en) * | 2020-06-04 | 2020-08-14 | 浙江银轮机械股份有限公司 | Water-cooling plate production method |
| CN112247354A (en) * | 2020-10-14 | 2021-01-22 | 浙江银轮机械股份有限公司 | Water cooling plate production process and water cooling plate welding device |
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Effective date of registration: 20220915 Address after: 246699 No. 17 Fangxing Road, Laofeng Town, Economic and Technological Development Zone, Anqing City, Anhui Province Applicant after: Anhui Xinfu New Energy Technology Co.,Ltd. Address before: 246000 No.16 Yingbin Avenue, Anqing Economic and Technological Development Zone, Anhui Province Applicant before: Anhui Huanxin Group Co.,Ltd. |