CN221080125U

CN221080125U - Integrated cold plate

Info

Publication number: CN221080125U
Application number: CN202322611379.7U
Authority: CN
Inventors: 曾茂进; 罗亮亮; 邹文龙; 刘金鹏
Original assignee: Zhejiang Xiangbo Cooling System Co ltd
Current assignee: Zhejiang Xiangbo Cooling System Co ltd
Priority date: 2023-09-26
Filing date: 2023-09-26
Publication date: 2024-06-04
Anticipated expiration: 2033-09-26

Abstract

The utility model discloses an integrated cold plate, which comprises an upper sealing plate and a bottom support aluminum plate, wherein a runner plate is arranged between the upper sealing plate and the bottom support aluminum plate; the runner plate is a flat plate with a flat edge, and a first runner groove is formed in the middle of the runner plate; the middle of the bottom support aluminum plate is sunken, and a second runner groove is formed in the sunken part; the novel sealing plate comprises a bottom support aluminum plate, a runner plate and an upper sealing plate, and is characterized by further comprising a welding lug, wherein the bottom support aluminum plate, the runner plate and the upper sealing plate are sequentially fixed on the welding lug. The utility model has the advantages of high stability and reliability of the cold plate structure, strong integrity, low cost, small assembly error and high production line manufacturing efficiency.

Description

Integrated cold plate

Technical Field

The utility model relates to the technical field of power batteries, in particular to an integrated cold plate.

Background

Along with the increasing requirements of electric automobile endurance mileage, the requirements on battery pack space energy density are more and more stringent, the cooling requirements of power batteries cannot be met by traditional air cooling, and liquid cooling has gradually become a main scheme. At present, a conventional liquid cooling plate mainly comprises a runner plate and a flat plate, wherein the runner plate is stamped through a die to form a runner groove, and then is welded with the flat plate to form a runner, and a cooling working medium flows in the runner.

The conventional liquid cooling plate can only utilize a single-side flat plate to contact with the battery module for heat exchange, and has the advantages of small heat exchange area and poor heat exchange effect. When two layers of batteries are placed in the battery pack, two liquid cooling plates are needed to cool, so that the height of the battery pack is increased, and the energy density of the battery pack is reduced. In addition, the cost is greatly improved due to the increase of the liquid cooling system pipelines, and meanwhile, the difficulty of flow uniformity adjustment is also increased.

The existing energy storage box body liquid cooling and heat dissipation modes mainly comprise an aluminum extruded section and a stamping cold plate. The mold for the cold plate runner of the aluminum extruded section is formed by stretching physical properties of aluminum materials, and then the aluminum base with the runner is formed by splicing by using processes such as friction stir welding and the like; the stamping cold plate adopts a stamping process to utilize the good ductility of aluminum materials, uses a specific runner mold to extrude the aluminum plates out of the runner, and then utilizes a clamp welding process to braze an upper sealing plate on the runner plate to form a closed runner space except for a water inlet and a water outlet.

Chinese patent document with publication number CN219066967U and publication date 2023, 5 and 23 discloses a liquid cooling plate, a battery module and a battery pack with nested flow channels, comprising: a cold plate upper plate; the cold plate lower plate is arranged at an upper-lower interval with the cold plate upper plate; the runner plate is arranged between the upper cold plate and the lower cold plate, and is provided with a first runner groove and a second runner groove which are mutually nested in a stamping mode, one of the upper end face or the lower end face of the runner plate is provided with the first runner groove, and the other runner plate is provided with the second runner groove; the cold plate upper plate and the cold plate lower plate are respectively adhered to the upper end face and the lower end face of the runner plate and seal the first runner groove and the second runner groove to form a first runner and a second runner respectively, and cooling liquid flows in the first runner and the second runner.

The aluminum extruded section has good bearing capacity, but the possibility that the water leakage and the air tightness of the runner are not up to the standard is easy to occur due to the welding and splicing process such as friction stir welding and the like, and the cost is high; the stamping cold plate has no strong bearing capacity and cannot support the weight of the battery by means of the mechanical property of the stamping cold plate, so that the stamping cold plate needs to bear the weight by means of the auxiliary metal plate bottom support, but the manufacturing process of the metal plate bottom support is complex and has many artificial variables.

Disclosure of Invention

The utility model aims to solve the problems of substandard air tightness, weak bearing capacity, complex manufacturing process and high cost in the prior art, and provides an integrated cold plate which has the advantages of high stability and reliability of the cold plate structure, strong integrity, low cost, small assembly error and high production line manufacturing efficiency.

The utility model adopts the technical scheme that the integrated cold plate comprises an upper sealing plate and a bottom support aluminum plate, wherein a runner plate is arranged between the upper sealing plate and the bottom support aluminum plate; the runner plate is a flat plate with a flat edge, and a first runner groove is formed in the middle of the runner plate; the middle of the bottom support aluminum plate is sunken, and a second runner groove is formed in the sunken part; the welding plate is fixed on the bottom support aluminum plate at one time, and the runner plate and the upper sealing plate are arranged on the upper sealing plate. The utility model solves the problem of weak bearing capacity in the prior art, and has the advantages of high stability and reliability and high structural strength.

Preferably, the aluminum bottom plate is square, a groove is arranged between the edge of the aluminum bottom plate and the concave part, the groove is concave towards the direction far away from the runner plate, and the second runner groove is concave towards the direction close to the runner plate. The first flow channel and the second flow channel are opposite to each other and concave to form a channel for liquid to pass through, and meanwhile, the support function is achieved inside, and the whole structure has good bearing capacity by utilizing the physical stability of the geometric shape.

Preferably, the second runner groove is a recess extending along the transverse direction of the bottom support aluminum plate, and comprises a thick second runner groove and a thin second runner groove; the width of the thick second flow channel is larger than that of the thin second flow channel, and the length of the thick second flow channel is the same as that of the thin second flow channel; a plurality of square protrusions are arranged in the thick second runner groove, and the protruding direction is the direction from the bottom support aluminum plate to the runner plate. The upper surface of the bulge is contacted with a part between the runner groove units on the runner plate, so that the supporting effect is achieved.

Preferably, the runner plate is fixed between the upper sealing plate and the bottom support aluminum plate, and a plurality of through holes are formed around the runner plate; the first runner groove on the runner plate comprises a plurality of runner groove units which are connected end to end and form a closed loop, and a plurality of connecting grooves used for communicating the runner groove units to form parallel grooves, wherein the groove depth of the connecting grooves is the same as that of the first runner groove. The runner grooves are of parallel structures, so that the cooling efficiency is improved, and the exchange speed of liquid is increased.

Preferably, the runner groove unit comprises two first channels arranged in the middle area of one end face of the runner plate and a second channel arranged at the periphery of the two first channels, and the two first channels and the first channel and the second channel are communicated through the connecting groove. The runner grooves are communicated through the connecting grooves, so that liquid can conveniently pass through the runner grooves and rapidly flow out of the runner grooves.

Preferably, the first channels are rectangular channels extending along the length direction of the runner plate, and the two second channels are arranged in parallel with the first channels; the first runner groove further comprises a plurality of transverse grooves which are perpendicular to the first runner.

Preferably, the edge of the runner plate is tightly attached to the edge of the bottom support aluminum plate and the edge of the upper sealing plate. The edges of the three layers of plates are tightly attached, so that the stability is ensured.

Preferably, two protrusions are arranged at two ends of the upper sealing plate along the width direction; the upper sealing plate is a rectangular sheet, and a plurality of mounting holes corresponding to the through holes around the flow passage plate are formed in the periphery of the upper sealing plate. The mounting holes are overlapped with the through holes and are used for accommodating fixing parts such as bolts and the like, so that the fixing parts can be tightly attached, and water leakage and the like are avoided.

Preferably, the welding lug is L-shaped and long, and two protruding pieces are arranged at one side, close to the runner groove, of each of the two ends of the welding lug. The length of the lug is smaller than the distance from the concave part of the aluminum plate to the edge of the aluminum plate, and the lug is used for fixing the aluminum plate.

Preferably, the bottom support aluminum plate, the runner plate and the upper sealing plate are welded by adopting a brazing process. The three-layer plate composite brazing process is adopted, three layers and half layers are integrated through one procedure, and the integrity and the structural stability are improved;

The utility model has the advantages of simplifying the liquid cooling plate process, reducing the manual error, reducing the manufacturing cost and improving the stability of the whole structure.

Drawings

FIG. 1 is a schematic exploded view of an integrated cold plate according to the present utility model;

FIG. 2 is a cross-sectional view of an integrated cold plate of the present utility model;

FIG. 3 is a schematic view of a bottom aluminum plate of an integrated cold plate according to the present utility model;

FIG. 4 is a horizontal cross-sectional view of an integrated cold plate of the present utility model;

In the figure: 1. the upper sealing plate, the runner plate, the bottom support aluminum plate, the welding lug, the first runner groove, the first channel, the second channel, the connecting groove, the transverse groove and the second runner groove 31 are arranged on the upper sealing plate, the runner plate, the bottom support aluminum plate, the welding lug and the first runner groove, the first channel, the second channel, the connecting groove and the transverse groove.

Detailed Description

The following describes a specific embodiment of the technical scheme of the present utility model by way of examples and with reference to the accompanying drawings.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Furthermore, it should be noted that the terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In one embodiment of the utility model, the sealing plate consists of an upper sealing plate and a bottom support aluminum plate, and a runner plate is arranged between the upper sealing plate and the bottom support aluminum plate; the runner plate is a flat plate with a flat edge, and a first runner groove of the runner plate is adjusted in the middle; the center of the bottom support aluminum plate is concave, and a second flow channel groove is formed in the concave; the welding plate is characterized by further comprising a welding plate, and edges of the bottom support aluminum plate, the runner plate and the upper sealing plate are sequentially fixed on the welding plate. The bottom support aluminum plate is rectangular, and a groove is arranged between the edge of the bottom support aluminum plate and the concave part. The recess is concave in a direction away from the flow field plate and the second flow field recess is concave in a position closer to the flow field plate. The second runner groove is a horizontally long concave, and comprises a thick second runner groove and a thin second runner groove; the width of the thick second runner groove is larger than that of the thin second runner groove, and the length of the thick second runner groove is the same as that of the thin second runner groove; the thick second flow channel is provided with a plurality of square protrusions, the direction of which is directed from the lower support aluminum plate to the channel plate.

In this embodiment, the nested flow channels are formed by stamping in different directions on the flow channel plate, thereby realizing the mode that a single flow channel plate is made into two flow channels.

Through above-mentioned setting, increased heat transfer area, can satisfy the heat dissipation of upper and lower two-layer electric core module, realize single liquid cooling board cooling two-layer battery, reduced battery package thickness, improved energy density.

In one embodiment of the utility model, the runner plate is fixed between the upper sealing plate and the bottom support aluminum plate, and a plurality of through holes are arranged around the runner plate; the first runner groove on the runner plate comprises a plurality of runner groove units which are connected end to end and form a closed loop, and a plurality of connecting grooves used for communicating the runner groove units to form parallel grooves, wherein the groove depth of the connecting grooves is the same as the groove depth of the first runner groove.

In this embodiment, each flow channel cell is designed to be left in parallel.

Through the arrangement, fluid can uniformly flow into each channel, so that the flow uniformity of the fluid is improved, the uniformity of the fluid temperature is ensured, and the uniformity of the battery temperature is further improved.

In one embodiment of the utility model, the runner groove unit comprises two first channels arranged in the middle area of one end face of the runner plate and a second channel arranged at the periphery of the two first channels, and the two first channels and the first channel and the second channel are communicated through connecting grooves.

In this embodiment, connecting grooves having different depths are punched in the flow channel plate.

Through the arrangement, the whole runner groove is communicated, the connecting groove also plays a role in turbulence, the fluid flow boundary sense is destroyed, the fluid can be fully mixed, and the heat exchange capacity is increased.

In one embodiment of the utility model, the first channel is a rectangular channel extending along the length direction of the flow channel plate, and the two second channels are arranged in parallel with the first channel; the first runner groove also comprises a plurality of transverse grooves which are perpendicular to the first runner.

In one embodiment of the utility model, the edges of the runner plate are closely attached to the edges of the bottom support aluminum plate and the edges of the upper sealing plate.

In this embodiment, the three-layer plate is formed integrally by a brazing process.

Through above-mentioned setting for go up the shrouding, runner board and collet wholeness are better, let overall structure more stable greatly increased mechanical properties.

In one embodiment of the utility model, two protrusions are arranged at two ends of the upper sealing plate along the width direction; the upper sealing plate is a rectangular thin plate, and a plurality of mounting holes corresponding to the through holes around the runner plate are formed in the periphery of the upper sealing plate.

In this embodiment, the length of the protrusions is less than the distance from the bottom aluminum plate depression to the edge.

Through the arrangement, the fixing effect of the soldering lug on the bottom support aluminum plate is improved, and the soldering lug is used for fixing the bottom support aluminum plate.

In one embodiment of the utility model, the welding lug is L-shaped and long, and two protruding pieces are arranged at one side of two ends of the welding lug, which is close to the runner groove.

In this embodiment, the shoe is brazed to the cold plate as one piece using a lug.

Through above-mentioned setting for overall structure is more stable, has reduced the cost of manufacture.

In one embodiment of the utility model, the bottom support aluminum plate, the runner plate and the upper sealing plate are welded by adopting a brazing process.

In this embodiment, the runner plate is made of a composite material and comprises 10% of 4343 solder composite layer, the cold plate is connected with the bottom support by soldering lugs, the bottom support is provided with five solder composite layers with 10% of 4343 solder, grooves are formed in the periphery of the bottom support, and soldering lugs are placed for soldering.

Through the arrangement, the cold plate and the bottom bracket have more integrity.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

As shown in fig. 1-4, an integrated cold plate comprises an upper sealing plate and a bottom support aluminum plate, wherein a runner plate is arranged between the upper sealing plate and the bottom support aluminum plate; the runner plate is a flat plate with a flat edge, and a first runner groove is formed in the middle of the runner plate; the middle of the bottom support aluminum plate is sunken, and a second runner groove is formed in the sunken part; the welding plate is sequentially fixed with the bottom support aluminum plate, the runner plate and the upper sealing plate.

The runner plate is fixed between the upper sealing plate and the bottom support aluminum plate, and a plurality of through holes are formed around the runner plate; the first runner groove on the runner plate comprises a plurality of runner groove units which are connected end to end and form a closed loop, and a plurality of connecting grooves used for communicating the runner groove units to form parallel grooves, wherein the groove depth of the connecting grooves is the same as the groove depth of the first runner groove. The runner groove unit comprises two first channels arranged in the middle area of one end face of the runner plate and a second channel arranged on the periphery of the two first channels, and the two first channels and the first channel and the second channel are communicated through connecting grooves. The first channels are rectangular channels extending along the length direction of the runner plate, and the two second channels are arranged in parallel with the first channels; the first runner groove also comprises a plurality of transverse grooves which are perpendicular to the first runner. The edge of the runner plate is tightly attached to the edge of the bottom support aluminum plate and the edge of the upper sealing plate. Two protrusions are arranged at two ends of the upper sealing plate along the width direction; the upper sealing plate is a rectangular thin plate, and a plurality of mounting holes corresponding to the through holes around the runner plate are formed in the periphery of the upper sealing plate. The welding lug is L-shaped and long, and two lugs are arranged at one side of the two ends of the welding lug, which is close to the runner groove. The bottom support aluminum plate, the runner plate and the upper sealing plate are welded by adopting a tunnel furnace multi-layer composite brazing process, the runner plate adopts a composite material to contain 4343 solder composite layers with the content of 10%, the cold plate is connected with the bottom support by adopting soldering lugs, the bottom support is provided with five solder composite layers with the content of 10%4343, grooves are formed in the periphery of the bottom support, and soldering lugs are placed for brazing.

The collet aluminum plate is the rectangle, is equipped with the recess between collet aluminum plate edge and the depressed part, and the recess is sunken to the direction of keeping away from the runner board, and the second runner groove is sunken to the direction of being close to the runner board. The second flow channel groove is a concave extending along the transverse direction of the bottom support aluminum plate and comprises a thick second flow channel groove and a thin second flow channel groove; the width of the thick second flow channel is larger than that of the thin second flow channel, and the length of the thick second flow channel is the same as that of the thin second flow channel; the thick second runner inslot is equipped with a plurality of square archs, and bellied direction is the direction that points to the runner board from collet aluminum plate, utilizes a sunken cold plate in the middle of making overall structure divide into the three-layer, lets the punching press runner of runner board play the support in inside to utilize the physical stability of geometry to make overall structure have fine bearing capacity.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An integral cold plate which is characterized in that:

The sealing device comprises an upper sealing plate (1) and a bottom support aluminum plate (3), wherein a runner plate (2) is arranged between the upper sealing plate (1) and the bottom support aluminum plate (3); the runner plate (2) is a flat plate with a flat edge, and a first runner groove (21) is formed in the middle of the runner plate;

The middle of the bottom support aluminum plate (3) is sunken, and a second runner groove (31) is formed in the sunken part;

The novel flow channel plate comprises a base aluminum plate (3), a flow channel plate (2) and an upper sealing plate (1), and is characterized by further comprising a soldering lug (4), wherein the bottom aluminum plate (3) is sequentially fixed on the soldering lug (4).

2. An integrated cold plate according to claim 1, wherein:

the bottom support aluminum plate (3) is rectangular, a groove is formed between the edge of the bottom support aluminum plate (3) and the concave part, the groove is concave towards the direction far away from the runner plate (2), and the second runner groove (31) is concave towards the direction far away from the runner plate (2).

3. An integrated cold plate according to claim 1 or 2, characterized in that:

The second runner groove (31) is a concave extending along the transverse direction of the bottom support aluminum plate (3) and comprises a thick second runner groove (31) and a thin second runner groove (31);

the width of the thick second flow channel (31) is larger than that of the thin second flow channel (31), and the length of the thick second flow channel (31) is the same as that of the thin second flow channel (31);

A plurality of square protrusions are arranged in the thick second runner groove (31), and the protruding direction is the direction from the bottom support aluminum plate (3) to the runner plate (2).

4. An integrated cold plate according to claim 1, wherein:

the runner plate (2) is fixed between the upper sealing plate (1) and the bottom support aluminum plate (3), and a plurality of through holes are formed in the periphery of the runner plate (2);

The first runner groove (21) on the runner plate (2) comprises a plurality of runner groove units which are connected end to end and form a closed loop and a plurality of connecting grooves (213) which are used for communicating the runner groove units to form parallel grooves, and the groove depth of the connecting grooves (213) is the same as the groove depth of the first runner groove (21).

5. An integrated cold plate as defined in claim 4, wherein:

the runner groove unit comprises two first grooves (211) arranged in the middle area of one end face of the runner plate (2) and second grooves (212) arranged on the periphery of the two first grooves (211), and the two first grooves (211) and the second grooves (212) are communicated through the connecting grooves (213).

6. An integrated cold plate according to claim 5, wherein:

The first channels (211) are rectangular channels extending along the length direction of the flow channel plate (2), and the two second channels (212) are arranged in parallel with the first channels (211);

the first flow channel (21) further comprises a plurality of transverse grooves (214) which are perpendicular to the first channel (211).

7. An integrated cold plate according to claim 1 or 6, characterized in that:

the edges of the runner plates (2) are tightly attached to the edges of the bottom support aluminum plates (3) and the edges of the upper sealing plate (1).

8. An integrated cold plate according to claim 4 or 5, characterized in that:

two protrusions are arranged at two ends of the upper sealing plate (1) along the width direction;

the upper sealing plate (1) is a rectangular sheet, and a plurality of mounting holes corresponding to through holes around the runner plate (2) are formed in the periphery of the upper sealing plate.

9. An integrated cold plate according to claim 1, wherein:

The welding lug (4) is L-shaped and long, and two protruding pieces are arranged at one side, close to the flow channel groove, of each of the two ends of the welding lug (4).

10. An integrated cold plate according to claim 1, wherein:

And the bottom support aluminum plate (3), the runner plate (2) and the upper sealing plate (1) are welded by adopting a brazing process.