CN115207526A - Method for welding and grouping battery pack liquid cooling heat dissipation structure conversion blocks - Google Patents
Method for welding and grouping battery pack liquid cooling heat dissipation structure conversion blocks Download PDFInfo
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- CN115207526A CN115207526A CN202210815452.XA CN202210815452A CN115207526A CN 115207526 A CN115207526 A CN 115207526A CN 202210815452 A CN202210815452 A CN 202210815452A CN 115207526 A CN115207526 A CN 115207526A
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- 238000003466 welding Methods 0.000 title claims abstract description 99
- 238000001816 cooling Methods 0.000 title claims abstract description 81
- 239000007788 liquid Substances 0.000 title claims abstract description 81
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 72
- 239000003507 refrigerant Substances 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 15
- 230000035515 penetration Effects 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 2
- 239000002826 coolant Substances 0.000 claims 2
- 238000005260 corrosion Methods 0.000 claims 1
- 238000004146 energy storage Methods 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
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- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
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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
- H01M10/65—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
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
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- 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
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
-
- 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
-
- 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
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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
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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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
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
-
- 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
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- 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
- B23K2101/36—Electric or electronic devices
-
- 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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Abstract
The invention relates to a welding and grouping method for liquid cooling heat dissipation structures of energy storage battery packs, which comprises the following steps: the invention has the advantages that the structure is novel, the heat generated in the charging and discharging process of the energy storage battery pack can be effectively led out, the electric core can always run under a proper temperature environment, the good service performance of the battery is kept, the service life of the battery is prolonged, the structure utilizes the conversion block to cover the transverse tolerance in the electric core assembling process, the battery is more efficiently installed and grouped, the welding and grouping operation is simple, the reliability is high, the service life is long, and the popularization value is higher.
Description
Technical Field
The invention belongs to the technical field of heat management of energy storage batteries, and particularly relates to a method for welding and grouping conversion blocks of a liquid cooling heat dissipation structure of a battery pack.
Background
When a general energy storage battery pack charges or discharges an energy storage system, a large amount of heat can be generated, and due to the tight influence of the spatial arrangement of the batteries, the temperature in the energy storage battery pack can rise rapidly, even if the temperature of the battery pack and the total arrangement space in a container can be effectively reduced under the action of the existing heat dissipation device, the local heat in the container is difficult to be uniformly discharged, the operating environment of the batteries has great difference, the battery pack can cause serious difference of internal resistance and capacity among the batteries after long-term operation in the environment with large temperature difference, partial batteries can be overcharged or overdischarged, the performance and the service life of the energy storage system are influenced, and the potential safety hazard can be caused seriously. Therefore, the heat dissipation of the energy storage system is a key factor for determining the operational performance, safety performance and lifetime of the energy storage system.
The mainstream energy storage battery cooling mode comprises wind cooling and liquid cooling, the wind cooling is mainly realized by air supply elements such as a heat dissipation fan, the residual space inside the container type energy storage battery is limited, a fan with larger volume is difficult to arrange, and then a mode of supplying air by a porous air pipe can be selected as a substitute, but the position of the air pipe is relatively fixed, and when the air pipe is used for supplying air, the adjustment range of parameters such as the wind direction and the wind speed of cold air is limited, so that the phenomenon of uneven air supply is easy to occur, and the wind cooling effect is seriously influenced; compare air-cooled refrigerated mode, liquid cooling form effect can be more obvious, but when the liquid cooling system acts alone, can mainly cool down fast high-efficiently to container lateral part or group battery bottom, the inside heat of container, group battery still is difficult to timely distribute away, and whole cooling effect is unsatisfactory.
Therefore, a more efficient and reasonable thermal management scheme for energy storage battery design is needed to provide technical reference for the development and market competition of container type energy storage systems.
Disclosure of Invention
Aiming at the problems, the invention provides a method for welding conversion blocks of a liquid cooling heat dissipation structure of a battery pack into groups. However, because electric core dimensional tolerance is great, there is certain problem in the liquid cooling board between electric core and the grouping, welding of water knockout drum, consequently, in this scheme, sets up the conversion piece between liquid cooling board and water knockout drum, makes weld clearance reduce by a wide margin, guarantees quality in groups.
In order to realize the functions, the invention adopts the following technical scheme: a method for welding and grouping liquid cooling heat dissipation structures of energy storage battery packs is characterized by comprising the following steps:
s1, installing a liquid cooling plate: sequentially inserting a plurality of liquid cooling plates into the water separator;
s2, installing a conversion block: sleeving a plurality of conversion blocks on the connecting end parts of the liquid cooling plates;
s5, welding a liquid cooling plate: pressing the conversion block on the surface of the water separator bottom plate by using a jig, welding and fixing the connection end part of the conversion block and the liquid cooling plate along the outer edge of the connection end part of the liquid cooling plate, and sealing and connecting the conversion block and the liquid cooling plate;
s4, welding a conversion block: welding and fixing the conversion block and the water separator to be in sealing connection;
and S5, welding an upper cover of the water distributor, and welding and fixing the upper cover of the water distributor and the bottom plate of the water distributor to be in sealing connection.
Furthermore, a refrigerant channel is arranged in the liquid cooling plate, two connecting end portions extending outwards are arranged at one end of the liquid cooling plate, and two outlets of the refrigerant channel are arranged on the connecting end portions.
Further, an extrusion process is arranged between the step S1 and the step S2, and the connecting end part of the liquid cooling plate is extruded to close a refrigerant channel; and a hole expanding process is also arranged between the step S2 and the step S3, and the jig is used for expanding the refrigerant channel extruded and closed by the connecting end part to ensure that the outer surface of the refrigerant channel is in close contact with the conversion block.
Furthermore, the water knockout drum is long box-shaped structure, wherein, the water knockout drum upper cover is plate type structure, the water knockout drum bottom plate is the cell type structure, and its bottom is equipped with a plurality of liquid cooling board connectors, and its notch department is equipped with the heavy platform of location, the water knockout drum upper cover is located in the heavy platform of location.
Furthermore, the water knockout drum is long box-shaped structure, wherein, the water knockout drum upper cover is the cell type structure, the water knockout drum bottom plate is plate type structure, is equipped with a plurality of liquid cooling board installing ports on it, the outer edge of water knockout drum bottom plate is equipped with the heavy platform of location, the water knockout drum upper cover is located in the heavy platform of location.
Further, the conversion blocks are circular, square or other irregular shapes.
Furthermore, the welding method is laser welding, and the welding speed is 50-200 mm/s.
Furthermore, the welding penetration is less than or equal to 5mm, and the welding penetration is less than or equal to 3mm.
Furthermore, the welding joints are all provided with anticorrosive coatings.
In conclusion, the heat dissipation device has a novel structure, can effectively derive heat generated in the charging and discharging processes of the battery pack, is simple in structure, can be realized by installing the liquid cooling plate between the electric cores and introducing a refrigerant, and has the characteristics of high heat dissipation efficiency and better temperature uniformity compared with the traditional air-cooled heat dissipation and water-cooled heat dissipation device.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of the invention (cells are not shown in the drawing);
fig. 3 is a schematic structural diagram of an embodiment of the invention (cells are not shown in the drawing);
fig. 4 is an enlarged view of fig. 3 at a.
Description of reference numerals:
the system comprises a liquid cooling plate 1, a refrigerant channel 11, a connecting end 12, a water separator 2, a water separator base plate 21, a water separator upper cover 22, a liquid cooling plate connecting port 23, a refrigerant interface 24, a positioning sinking platform 25 and a conversion block 3.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be further described in detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
A method for welding and grouping liquid cooling heat dissipation structures of energy storage battery packs shown in figures 1 to 4 is characterized by comprising the following steps:
s1, installing a liquid cooling plate: sequentially inserting a plurality of liquid cooling plates into the water separator;
s2, installing a conversion block: sleeving a plurality of conversion blocks on the connecting end parts of the liquid cooling plates;
s3, welding a liquid cooling plate: pressing the conversion block on the surface of the water distributor bottom plate by using a jig, welding and fixing the connection end part of the conversion block and the liquid cooling plate along the outer edge of the connection end part of the liquid cooling plate, and hermetically connecting the conversion block and the liquid cooling plate; in the welding process of the step, the welding seam is positioned on a line where the outer surface of the connecting end part is contacted with the conversion block, so that the welding penetration depth is 0.6mm, the welding penetration width is 1.5mm, and the excessive penetration depth can cause the connecting end part 12 to be welded through, so that the sealing fails. The method adopts a mode of compositely welding a 2000W semiconductor laser and a 2000W continuous fiber laser, adopts a welding head as a quasi-direct focusing welding head, and has the welding speed of 120mm/s;
s4, welding a conversion block: welding and fixing the conversion block and the water separator to be in sealing connection; in the welding of the step, the welding seam is positioned on the conversion block 3 and is 3mm away from the edge of the conversion block 3, so that the welding seam penetration of the next step is 4mm, the welding width is 2mm, a 2000W semiconductor laser and 2000W continuous optical fiber laser are compositely welded, the adopted welding head is a quasi-straight focusing welding head, and the welding speed is 80mm/s;
and S5, welding an upper cover of the water distributor, and welding and fixing the upper cover of the water distributor and the bottom plate of the water distributor to be in sealing connection. In this step, the water distributor bottom plate 21 and the water distributor upper cover 22 which are connected by welding have certain thicknesses, so that the welding penetration depth is 2mm, the welding width is 2mm, and the welding strength and the sealing performance can be effectively ensured. Similarly, a mode of compositely welding a 2000W semiconductor laser and a 2000W continuous fiber laser is adopted, the adopted welding head is a quasi-straight focusing welding head, and the welding speed is 100mm/s;
furthermore, a refrigerant channel is arranged in the liquid cooling plate, two connecting end portions extending outwards are arranged at one end of the liquid cooling plate, and two outlets of the refrigerant channel are arranged on the connecting end portions.
Furthermore, an extrusion process is also arranged between the steps S1 and S2, namely the connecting end part of the liquid cooling plate is extruded, and a refrigerant channel is closed; and a hole expanding process is also arranged between the step S2 and the step S3, and a jig is used for expanding the refrigerant channel extruded and closed in the middle of the connecting end part to enable the outer surface of the refrigerant channel to be in close contact with the conversion block.
Furthermore, the water knockout drum is long box-shaped structure, wherein, the water knockout drum upper cover is plate type structure, the water knockout drum bottom plate is the cell type structure, and its bottom is equipped with a plurality of liquid cooling board connectors, and its notch department is equipped with the heavy platform of location, the water knockout drum upper cover is located in the heavy platform of location.
Furthermore, the water knockout drum is long box-shaped structure, wherein, the water knockout drum upper cover is the cell type structure, the water knockout drum bottom plate is plate type structure, is equipped with a plurality of liquid cooling board installing ports on it, the outer edge of water knockout drum bottom plate is equipped with the heavy platform of location, the water knockout drum upper cover is located in the heavy platform of location.
Furthermore, the conversion block is circular, in the welding process, the track of the welding head is carried out along the edge of the circle, and the welding track is free of folding corners, so that the welding is convenient to weld into groups. In other embodiments, the outer edge of the conversion block 3 may be square, trapezoidal or any other shape, and it is only necessary to ensure that the conversion block 3 completely covers the liquid cooling plate connection port 23 on the water separator bottom plate 21 and exceeds 5mm.
Furthermore, the welding method is laser welding, a 2000W semiconductor laser and a 2000W continuous fiber laser are combined for welding, the adopted welding head is a quasi-straight focusing welding head, and the welding speed is 100mm/s. In the welding process, a water cooling machine is used for cooling in the whole process, and meanwhile, nitrogen is introduced to protect the welding head.
Further, the welding interface all is equipped with anticorrosive coating, and in this embodiment, this anticorrosive coating is the antioxidant layer, and in other embodiments, anticorrosive coating also can be structural adhesive, vulcanize or other material coating that can insulate welding interface and refrigerant.
In this embodiment, be equipped with a plurality of electric cores between two liquid cold plate 2, because the dimensional tolerance of electric core, the dimensional tolerance of insulating and heat insulating material between the electric core, make hookup location between liquid cold plate 1 and the water knockout drum 2, it is great to change in the left and right sides direction, therefore, liquid cold plate connector 23 width on the water knockout drum bottom plate 21 is 8mm, this width is for the convenience of being connected of liquid cold plate 1 and water knockout drum 2, however, the connector of overwidth has increased the welded degree of difficulty, direct welding liquid cold plate 1 and water knockout drum 2 the words, welded joint strength and sealing performance can't be guaranteed. Therefore, the conversion block 3 is added between the liquid cooling plate 1 and the water separator 2, and the liquid cooling plate connecting port 23 is covered by the width of the conversion block 3, so that the welding is more reliable.
As shown in fig. 2, in this embodiment, the connection end portions 12 of the liquid cooling plate 1 are disposed at two ends of the bottom of the liquid cooling plate 1, the liquid cooling plate 1 in this embodiment is a phase change inhibiting heat transfer plate, and is formed by hot rolling two aluminum alloy plates with a thickness of 0.8mm into a whole, and the refrigerant channel 11 thereon is made by a blowing process, and has a single side protruding by 0.5mm. Therefore, the thickness of the thickest part of the whole liquid cooling plate 1 is 2.6mm, and the connecting end part 12 is of a structure with two thin ends and a thick middle part. However, due to the limitation of the hot rolling process, the position of the refrigerant channel 11 at the connecting end portion 12 is not fixed, and a large position deviation exists, so before the conversion block 3 is installed, the refrigerant channel 11 at the connecting end portion 12 is extruded to be closed, then the conversion block 3 is sleeved on the connecting end portion 12, the opening on the conversion block 3 is made into a form with two narrow ends and a wide middle, the conversion block 3 is installed in place and is tightly pressed on the water distributor bottom plate 21, and the previously closed refrigerant channel 11 is expanded by using a jig, which needs to be noted that, no matter the position of the previously closed refrigerant channel 11 is on the upper side or on the lower side, the middle of the connecting end portion 12 is expanded during the expansion in one step, so that the outer surface of the connecting end portion can be in close contact with the opening on the conversion block 3, the connecting end portion 12 is in sealing connection with the conversion block 3 during welding, and the reliability of welding sealing is improved.
With liquid cooling board 1 and conversion piece 3 welded fastening back, change the welding of piece 3 and water knockout drum bottom plate 21, in this embodiment, 3 outer edge shapes of conversion piece are circular, during the welding, along 3 outer edge 3mm departments welding a week of conversion piece, the welding orbit is circular apart from avoiding the corner, and whole welding seam is smooth even, better control welding quality.
In this embodiment, set up two water knockout drums 2 relatively, two refrigerant interfaces 23 set up respectively between the first and second liquid cooling board of front end or rear end, the refrigerant passes through refrigerant interface 23 and gets into the water knockout drum, through liquid cooling board connector 23 on water knockout drum bottom plate 21, flow in each liquid cooling board 1, pass through from refrigerant passageway 11 in liquid cooling board 1, take away the heat that electric core gived off, flow in the water knockout drum 2 of opposite side, flow out from refrigerant interface 23 on this water knockout drum 2, circulate once more. The benefit of design like this lies in, makes the hydraulic pressure equilibrium in each liquid cold plate 1, and each liquid cold plate 1 of inflow that the refrigerant can be even, and the radiating effect of each electric core is the same, makes the temperature uniformity of group battery better.
As shown in fig. 2 and fig. 3, in this embodiment, a module bottom plate is disposed between the liquid cooling plate 1 and the water separator 2, and the electric core is disposed on the module bottom plate and is in close contact with the liquid cooling plate 1, which can be easily concluded by a person skilled in the art, and therefore is not shown in this embodiment.
In the welding process, weld penetration is detected in real time, because the battery pack is positioned on an assembly line during welding, only one module bottom plate is separated between a water distributor bottom plate and an electric core, the thickness of the water distributor bottom plate is limited, if the weld penetration is too large, not only can welding sealing failure be caused, the safety of the electric core can be seriously influenced, the weld penetration is too small, the welding connection is unreliable, the sealing effect cannot be ensured, and therefore the control of the weld penetration is particularly important and needs real-time detection so as to be adjusted at any time. Because the conversion block is brought in the invention, all welding parts are tightly connected, thereby being convenient to ensure the welding strength and the welding sealing performance.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A method for welding and grouping conversion blocks of a liquid cooling heat dissipation structure of a battery pack is characterized by comprising the following steps:
s1, installing a liquid cooling plate: sequentially inserting a plurality of liquid cooling plates into the water separator;
s2, installing a conversion block: sleeving a plurality of conversion blocks on the connecting end parts of the liquid cooling plates;
s5, welding a liquid cooling plate: pressing the conversion block on the surface of the water distributor bottom plate by using a jig, welding and fixing the connection end part of the conversion block and the liquid cooling plate along the outer edge of the connection end part of the liquid cooling plate, and hermetically connecting the conversion block and the liquid cooling plate;
s4, welding a conversion block: welding and fixing the conversion block and the water separator to be in sealing connection;
and S5, welding an upper cover of the water distributor, and welding and fixing the upper cover of the water distributor and the bottom plate of the water distributor to enable the upper cover of the water distributor and the bottom plate of the water distributor to be connected in a sealing mode.
2. The method as claimed in claim 1, wherein the liquid cooling structure conversion block of the battery pack is welded into a group, wherein a coolant channel is formed in the liquid cooling plate, two connection end portions extending outwards are formed at one end of the liquid cooling plate, and an opening of the coolant channel is formed in the connection end portions.
3. The method for welding the conversion blocks of the liquid cooling heat dissipation structure of the battery pack into groups according to claim 1, wherein an extrusion process is further arranged between the steps S1 and S2, and the connection end part of the liquid cooling plate is extruded to close a refrigerant channel of the liquid cooling plate; and a hole expanding process is also arranged between the step S2 and the step S3, and the jig is used for expanding the refrigerant channel extruded and closed by the connecting end part to ensure that the outer surface of the refrigerant channel is in close contact with the conversion block.
4. The method of claim 1, wherein the water separator is a long box structure, wherein the upper cover of the water separator is a plate structure, the bottom plate of the water separator is a groove structure, the bottom of the water separator is provided with a plurality of liquid cooling plate connectors, the notches of the liquid cooling plate connectors are provided with positioning sinking platforms, and the upper cover of the water separator is positioned in the positioning sinking platforms.
5. The method of claim 1, wherein the water separator is of a long box structure, the upper cover of the water separator is of a groove structure, the bottom plate of the water separator is of a plate structure and is provided with a plurality of liquid cooling plate mounting ports, the outer edge of the bottom plate of the water separator is provided with a positioning sinking platform, and the upper cover of the water separator is positioned in the positioning sinking platform.
6. The method for welding and grouping conversion blocks of a liquid cooling heat dissipation structure of a battery pack according to claim 1, wherein the conversion blocks are circular, square or other irregular shapes.
7. The method for welding the battery pack liquid cooling heat dissipation structure conversion blocks into groups as claimed in claim 1, wherein the welding method is laser welding, and the welding speed is 50-200 mm/s.
8. The method for welding and grouping conversion blocks of the liquid cooling heat dissipation structure of the battery pack according to claim 1, wherein the welding penetration is less than or equal to 5mm, and the welding penetration is less than or equal to 3mm.
9. The method for welding the battery pack liquid cooling heat dissipation structure conversion blocks into groups according to claim 1, wherein an anti-corrosion coating is arranged at each welding interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210815452.XA CN115207526A (en) | 2022-07-12 | 2022-07-12 | Method for welding and grouping battery pack liquid cooling heat dissipation structure conversion blocks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210815452.XA CN115207526A (en) | 2022-07-12 | 2022-07-12 | Method for welding and grouping battery pack liquid cooling heat dissipation structure conversion blocks |
Publications (1)
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|---|---|
| CN115207526A true CN115207526A (en) | 2022-10-18 |
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| CN202210815452.XA Pending CN115207526A (en) | 2022-07-12 | 2022-07-12 | Method for welding and grouping battery pack liquid cooling heat dissipation structure conversion blocks |
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| CN (1) | CN115207526A (en) |
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Country or region after: China Address after: 400000 No. 107, datagu Middle Road, Xiantao street, Yubei District, Chongqing Applicant after: Chongqing Gengchen Energy Technology Co.,Ltd. Address before: 400000 No. 107, datagu Middle Road, Xiantao street, Yubei District, Chongqing Applicant before: Chongqing Three Gorges Times Energy Technology Co.,Ltd. Country or region before: China |