Cold plate structure

Abstract

The utility model discloses a cold plate structure which comprises a liquid inlet, a liquid outlet, a panel and a bottom plate, the panel and the bottom plate are arranged in a covering mode to form a closed cavity structure, and the liquid inlet and the liquid outlet are both communicated with the cavity structure; a plurality of blocking structures are convexly arranged on the bottom plate at intervals towards the panel, each blocking structure comprises at least three bulge monomers, and the at least three bulge monomers are circumferentially arranged around a center at equal intervals, so that a plurality of runners are formed among the plurality of blocking structures and in the blocking structures. The cooling liquid can be divided and mixed for multiple times, the turbulence intensity of the cooling liquid is increased, and the cooling liquid is mixed more uniformly, so that the temperature uniformity and the heat exchange efficiency of the cooling liquid can be improved, uniform heat dissipation of the cold plate is realized, the service life of the lithium ion battery is prolonged, and the cruising ability of the lithium ion battery is improved.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery heat dissipation, and in particular to a cold plate structure. Background Art

[0002] Lithium-ion batteries, with their advantages such as large capacity and long discharge time, are widely used in electronic devices, energy storage devices, and new energy vehicles. Battery thermal management is key to the safety of new energy vehicles. A battery thermal management system can maintain temperature balance between individual cells, preventing the spread of cell inconsistencies caused by temperature imbalances between individual cells, thereby increasing the lifespan of the battery pack. However, with the rapid development of new energy vehicles, lithium-ion batteries are increasingly moving towards high power density, lightweight design, and high integration. Heat dissipation issues caused by high heat generation and limited heat dissipation space are becoming increasingly prominent, resulting in reduced service life and endurance.

[0003] At present, there are two main ways to dissipate heat for lithium-ion batteries: liquid cooling and air cooling. Among them, liquid cooling has better temperature difference control and heat dissipation efficiency than air cooling, and is widely used. For example, Chinese patent CN114824568A discloses a liquid cooling plate with a discharge flow channel structure for lithium-ion battery packs. The liquid cooling plate body is composed of a cover plate and a base. The base is designed with a flow channel, which consists of a liquid inlet channel, a liquid outlet channel and a branch channel. The branch channel is a forked structure similar to the root system of a tree branch. The flow channel of the liquid cooling plate adopts a topological structure similar to the shape of a tree branch root system. The setting of the branch channel improves the dispersion and flow effect of the coolant, thereby improving the cooling effect of the liquid cooling plate.

[0004] However, the above-mentioned liquid cooling plate structure still has a large area of ​​non-flow channel area, and the fluidity of the coolant is poor, resulting in poor heat dissipation effect. Utility Model Content

[0005] In order to solve the above-mentioned defects in the prior art, the purpose of this application is to provide a cold plate structure that can divert and mix the coolant multiple times, increase the turbulence intensity of the coolant, make the mixing of the coolant more uniform, thereby improving the heat exchange efficiency, achieving uniform heat dissipation of the cold plate, and thus improving the service life and endurance of the lithium-ion battery.

[0006] The technical solutions provided according to the purpose of this application are as follows:

[0007] A cold plate structure comprises: a liquid inlet, a liquid outlet, a face plate and a bottom plate, wherein the face plate and the bottom plate are arranged to cover each other to form a closed cavity structure, and the liquid inlet and the liquid outlet are both connected to the cavity structure;

[0008] A plurality of blocking structures are provided on the bottom plate and protruded toward the panel at intervals. The blocking structure comprises at least three protruding monomers, which are arranged around a central circumference with equal spacing to form a plurality of flow channels between and within the blocking structures.

[0009] As an optional embodiment, in the present application, the corresponding protruding units of several blocking structures are arranged in the same direction and angle, and the several blocking structures are arranged in rows along the first direction, and each row of blocking structures extends along the second direction.

[0010] As an optional embodiment, in the present application, each row of blocking structures is arranged at equal intervals along the first direction, and multiple blocking structures in the same row are arranged at equal intervals along the second direction.

[0011] As an optional embodiment, in the present application, the distance between two adjacent blocking structures in the same row is equal to the distance between two adjacent blocking structures in any other row.

[0012] As an optional implementation, in the present application, the number of blocking structures in each row is the same, and the blocking structures corresponding to each row are located on a straight line.

[0013] As an optional embodiment, in the present application, the ends of at least three protruding units of the blocking structure close to the center are spaced apart to form a central hole in the center of the blocking structure.

[0014] As an optional embodiment, in the present application, the protrusion monomer is a regular triangular prism protrusion, the blocking structure includes six regular triangular prism protrusions, and the bottom surface vertices of the six regular triangular prism protrusions are located at the circumferential edge of the central hole.

[0015] As an optional embodiment, in the present application, the protrusion monomer is an isosceles triangular prism protrusion, and the blocking structure includes three isosceles triangular prism protrusions, and the bottom surface vertices of the three isosceles triangular prism protrusions are located at the circumferential edge of the central hole.

[0016] As an optional embodiment, in the present application, the ends of at least three protruding units of the blocking structure close to the center are connected in sequence, so that the blocking structure is an integrated structure.

[0017] As an optional embodiment, in the present application, the protrusion unit is a quadrangular prism protrusion, the blocking structure includes six quadrangular prism protrusions, and the end faces close to the center of the six quadrangular prism protrusions are sequentially connected to form an integrated structure.

[0018] The cold plate structure provided by this application has the following technical effects:

[0019] The present application forms several blocking structures by arranging three protruding monomers around a central equidistant circle, which can form multiple flow channels in the cavity structure of the cold plate. The setting directions of the multiple flow channels are different. When the coolant flows in the cavity structure, the multiple flow channels can divert and mix the coolant multiple times, increasing the turbulence intensity of the coolant and making the mixing of the coolant more uniform, thereby improving the uniformity of the coolant temperature and the heat exchange efficiency, achieving uniform heat dissipation of the cold plate, and thus improving the service life and endurance of the lithium-ion battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the cold plate structure of Example 1;

[0021] Figure 2 A top view of the cold plate structure of Example 1;

[0022] Figure 3 Schematic diagram of the cold plate structure of Example 2;

[0023] Figure 4 A top view of the cold plate structure of Example 2;

[0024] Figure 5 This is a schematic structural diagram of the cold plate structure of Example 3;

[0025] Figure 6 This is a top view of the cold plate structure of Example 3.

[0026] Reference numerals:

[0027] 1. Bottom plate; 2. Blocking structure; 21. Center hole; 3. Protrusion unit; 31. Regular triangular prism protrusion; 32. Isosceles triangular prism protrusion; 33. Quadrangular prism protrusion. DETAILED DESCRIPTION

[0028] For better understanding and implementation, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0029] In the description of this application, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting this application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0031] Example 1

[0032] See Figure 1 and Figure 2 This embodiment provides a cold plate structure, including: a liquid inlet not shown in the figure, a liquid outlet not shown in the figure, a panel not shown in the figure, and a bottom plate 1 that is covered to form a closed cavity structure, and the liquid inlet and the liquid outlet are both connected to the cavity structure.

[0033] by Figure 2 In the first and second directions shown, the cold plate extends along the second direction, and the liquid inlet and the liquid outlet are respectively arranged at the two ends in the second direction. The liquid inlet and the liquid outlet can be opened on the panel or at the connection between the panel and the side of the bottom plate 1.

[0034] A plurality of blocking structures 2 are provided on the bottom plate 1 and protrude toward the panel at intervals. The blocking structure 2 includes at least three protruding monomers 3. The at least three protruding monomers 3 are arranged around a central circumference with equal spacing to form multiple flow channels between and within the blocking structures 2.

[0035] At least three protruding monomers 3 are arranged circumferentially and the spacing between any two adjacent ones is equal, and the gap formed by the spacing extends outward from the center. Several blocking structures 2 of this structure are scattered on the bottom plate 1, and can form multiple flow channels in different directions between the several blocking structures 2 and within the blocking structures 2 themselves. In the process of the coolant entering the cavity structure from the liquid inlet and flowing toward the liquid outlet, the coolant will encounter the obstruction of the protruding monomers 3 many times and change the flow direction, divert the flow, and mix with other flowing coolants, which increases the turbulence of the coolant and makes the mixing of the coolant more uniform, thereby improving the uniformity of the coolant temperature and the heat exchange efficiency, achieving uniform heat dissipation of the cold plate, and thus improving the service life and endurance of the lithium-ion battery.

[0036] In this embodiment, the corresponding protrusion units 3 of the plurality of blocking structures 2 are arranged in the same direction and at the same angle, and the plurality of blocking structures 2 are arranged in a row along the first direction, and each row of blocking structures 2 extends along the second direction.

[0037] The corresponding protrusions 3 of the plurality of blocking structures 2 are arranged in the same orientation and at the same angle, so that the plurality of blocking structures 2 have the same structure. In this way, the plurality of blocking structures 2 can be regularly arranged in rows on the base plate 1 and extend along the second direction. Thus, the plurality of blocking structures 2 can regularly redirect the coolant flow, divert it, and mix it with the coolant in other flow channels, further increasing the uniformity of the coolant mixing and improving the heat dissipation effect of the cold plate.

[0038] Furthermore, each row of blocking structures 2 is evenly spaced along the first direction, and multiple blocking structures 2 in the same row are evenly spaced along the second direction. The spacing between two adjacent blocking structures 2 in the same row is equal to the spacing between two adjacent blocking structures 2 in any other row. The number of blocking structures 2 in each row is the same, and the corresponding blocking structures 2 in each row are located in a straight line. This regular distribution of blocking structures 2 further enhances the heat dissipation efficiency of the cold plate.

[0039] Based on the above structure, the ends of the at least three protruding units 3 of the blocking structure 2 near the center are spaced apart to form a central hole 21 in the center of the blocking structure 2. The provision of the central hole 21 can add a small hole flow channel to the existing gap flow channel, which can make the distribution of the coolant more uniform.

[0040] Based on this, the protrusion unit 3 is a regular triangular prism protrusion 31, and the blocking structure 2 includes six regular triangular prism protrusions 31, and the vertices of the base surfaces of the six regular triangular prism protrusions 31 are located at the circumferential edge of the center hole 21. The upper and lower base surfaces of the regular triangular prism protrusions 31 are equilateral triangular structures and are arranged parallel to the top surface of the base plate 1. The side edges formed by connecting the vertices of the upper and lower base surfaces are located at the circumferential edge of the center hole 21. The six regular triangular prism protrusions 31 are arranged around a central, evenly spaced circle to form six equally spaced gaps between adjacent regular triangular prism protrusions 31, forming a center hole 21 at the center, and the six gaps extend outward from the center hole 21.

[0041] Thus, there are multiple flow channels in the cavity structure. The first type is the flow channel inside the blocking structure 2, that is, the gap between two adjacent regular triangular prism protrusions 31 and the center hole 21. The second type is the flow channel formed by the gap between two adjacent rows of blocking structures 2. The third type is as follows: Figure 2 The flow channel formed between two adjacent rows of blocking structures 2 is shown in A1. Figure 2 The diamond-shaped flow channel is formed between the four regular triangular prism protrusions 31 in two adjacent rows and two columns as shown in A2.

[0042] As the coolant enters the cavity structure from the liquid inlet and flows toward the liquid outlet, it first flows through the first and / or second flow channels to the center hole 21 for uniform distribution. It then flows through the flow channels A1 and A2 for mixing, increasing the turbulence of the coolant flow, before finally being evenly distributed through the center hole 21. This alternating process evenly distributes the coolant within the cavity structure, thereby improving coolant temperature uniformity and heat exchange efficiency, achieving uniform heat dissipation from the cold plate, and ultimately improving the service life and endurance of the lithium-ion battery.

[0043] Example 2

[0044] See Figure 3 and Figure 4 This embodiment also provides a cold plate structure. The difference between this cold plate structure and the cold plate structure of Example 1 is that the protrusion unit 3 is an isosceles triangular prism protrusion 32, and the blocking structure includes three isosceles triangular prism protrusions 32. The bottom surface vertices of the three isosceles triangular prism protrusions 32 are located at the circumferential edge of the center hole 21.

[0045] The upper and lower bases of the isosceles triangular prism projections 32 are isosceles triangular structures and are arranged parallel to the top surface of the base plate 1. The lateral edges formed by connecting the vertices of the upper and lower bases are located at the circumferential edge of the central hole 21. The three isosceles triangular prism projections 32 are arranged around a central, equally spaced circle to form three equally spaced gaps between adjacent isosceles triangular prism projections 32, forming the central hole 21 at the center. The three gaps extend outward from the central hole 21.

[0046] Thus, there are two types of flow channels in the cavity structure. The first type is the flow channel inside the blocking structure 2, that is, the gap between two adjacent isosceles triangular prism protrusions 32 and the center hole 21. The second type is as follows: Figure 4 A triangular flow channel is formed between the four isosceles triangular prism protrusions 32 in two adjacent rows and two columns as shown in A3.

[0047] As the coolant enters the cavity structure from the inlet and flows toward the outlet, it first flows through the first flow channel to the center hole 21 for even distribution. It then flows through the flow channel A3 for mixing, increasing the turbulence of the coolant flow, before finally being evenly distributed through the center hole 21. This alternating process evenly distributes the coolant within the cavity structure, thereby improving coolant temperature uniformity and heat exchange efficiency, achieving uniform heat dissipation from the cold plate, and ultimately improving the service life and endurance of the lithium-ion battery.

[0048] Example 3

[0049] See Figure 5 and Figure 6This embodiment also provides a cold plate structure. This cold plate structure differs from that of Example 1 in that the at least three protruding elements 3 of the blocking structure 2 are sequentially connected near the center, forming a single-piece structure. The connections between the three protruding elements 3 act as a barrier to the coolant, thereby diverting its flow.

[0050] Based on this, the protrusion unit 3 is a quadrangular prism protrusion 33, and the blocking structure 2 includes six quadrangular prism protrusions 33. The end faces of the six quadrangular prism protrusions 33 near the center are sequentially connected to form an integrated structure. The quadrangular prism protrusions 33 are rectangular parallelepiped structures, with a small side surface located near the center. The small side surfaces of the six quadrangular prism protrusions 33 are sequentially connected to form an integrated structure. The connection between the quadrangular prism protrusions 33 forms a blocking portion, and the angle between two adjacent quadrangular prism protrusions 33 is 60°.

[0051] Thus, there are three types of flow channels in the cavity structure. The first type is the flow channel inside the blocking structure 2, that is, the flow channel between two adjacent quadrangular prism protrusions 33. The second type is as follows: Figure 6 A4 shows a diamond-shaped flow channel formed between two adjacent rows of blocking structures 2. Figure 6 A5 shows a flow channel formed between four barrier structures 2 in two adjacent rows and two columns.

[0052] As the coolant enters the cavity structure from the inlet and flows toward the outlet, it is first evenly distributed through the first flow channel or small gap. Then, it mixes through the flow channel shown in A4 to disrupt and interrupt the development of the boundary layer, increasing the coolant's turbulence. It then enters the flow channel shown in A5 through the small gap flow channel, further increasing the coolant's turbulence. This alternating process evenly distributes the coolant within the cavity structure, thereby improving coolant temperature uniformity and heat exchange efficiency, achieving uniform heat dissipation from the cold plate, and ultimately improving the lifespan and endurance of the lithium-ion battery.

[0053] The technical means disclosed in the present application are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present application, and such improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A cold plate structure, characterized in that: include: A liquid inlet, a liquid outlet, a panel and a bottom plate (1), wherein the panel and the bottom plate (1) are arranged to cover each other to form a closed cavity structure, and the liquid inlet and the liquid outlet are both in communication with the cavity structure; A plurality of blocking structures (2) are provided on the bottom plate (1) at intervals and projecting toward the panel. The blocking structure (2) comprises at least three protruding monomers (3). The at least three protruding monomers (3) are arranged around a central circumference with equal spacing, so as to form a plurality of flow channels between the plurality of the blocking structures (2) and within the blocking structure (2).

2. The cold plate structure according to claim 1, characterized in that: The corresponding protruding monomers (3) of the plurality of blocking structures (2) are arranged in the same direction and at the same angle, and the plurality of blocking structures (2) are arranged in a row along the first direction, and each row of blocking structures (2) extends along the second direction.

3. The cold plate structure according to claim 2, characterized in that: The blocking structures (2) in each row are arranged at equal intervals along the first direction, and the plurality of blocking structures (2) in the same row are arranged at equal intervals along the second direction.

4. The cold plate structure according to claim 3, characterized in that: The distance between two adjacent blocking structures (2) in the same row is equal to the distance between two adjacent blocking structures (2) in any other row.

5. The cold plate structure according to claim 4, characterized in that: The number of the blocking structures (2) in each row is the same, and the blocking structures (2) corresponding to each row are located on a straight line.

6. The cold plate structure according to any one of claims 1 to 5, characterized in that: Ends of at least three protruding monomers (3) of the blocking structure (2) close to the center are spaced apart to form a central hole (21) in the center of the blocking structure (2).

7. The cold plate structure according to claim 6, characterized in that: The protrusion monomer (3) is a regular triangular prism protrusion (31), and the blocking structure (2) includes six regular triangular prism protrusions (31). The vertices of the bottom surfaces of the six regular triangular prism protrusions (31) are located at the circumferential edge of the central hole (21).

8. The cold plate structure according to claim 6, characterized in that: The protrusion monomer (3) is an isosceles triangular prism protrusion (32), and the blocking structure includes three isosceles triangular prism protrusions (32). The bottom surface vertices of the three isosceles triangular prism protrusions (32) are located at the circumferential edge of the central hole (21).

9. The cold plate structure according to any one of claims 1 to 5, characterized in that: Ends of at least three protruding monomers (3) of the blocking structure (2) close to the center are connected in sequence, so that the blocking structure (2) is an integrated structure.

10. The cold plate structure according to claim 9, characterized in that: The protrusion monomer (3) is a quadrangular prism protrusion (33), and the blocking structure (2) includes six quadrangular prism protrusions (33), and the end faces of the six quadrangular prism protrusions (33) close to the center are sequentially connected to form an integrated structure.

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