Liquid cooling plate

Abstract

The liquid cooling plate 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 fan blade structures are convexly arranged on the bottom plate towards the panel at intervals, each fan blade structure comprises three convex edges, one end parts of the three convex edges are connected to one point, and the other end parts of the three convex edges extend towards different directions, so that a plurality of flow channels are formed among the fan blade structures and in the fan blade 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 heat exchange efficiency of the cooling liquid can be improved, uniform heat dissipation of the liquid cooling 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 field of lithium battery heat dissipation technology, and in particular to a liquid cooling plate. 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 liquid cooling plate 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 liquid cooling plate, and thereby 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 liquid cooling plate 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] The bottom plate is provided with a plurality of fan structures protruding towards the panel, the fan structure comprises three protruding edges, one end of the three protruding edges is connected to a point and the other end extends towards different directions, so as to form a plurality of flow channels between the plurality of fan structures and in the plurality of fan structures.

[0009] As a preferred embodiment, in the present application, the corresponding protruding edges of the plurality of fan structures extend towards the same direction, and the plurality of fan structures are arranged in rows along the first direction, and each row of fan structures extends along the second direction.

[0010] As a preferred embodiment, in the present application, each row of fan structures is arranged at equal intervals along the first direction, and adjacent two rows of fan structures are staggered.

[0011] As a preferred embodiment, in the present application, a plurality of fan structures in the same row are arranged at equal intervals along the second direction, and the interval between adjacent two fan structures in the same row is equal to or not equal to the interval between adjacent two fan structures in any other row.

[0012] As a preferred embodiment, in the present application, the liquid inlet and the liquid outlet are respectively located at the two ends of the liquid cooling plate in the second direction, and the setting direction of the protruding edge close to the liquid outlet is parallel to the second direction.

[0013] As a preferred embodiment, in the present application, the setting direction of the protruding edge close to the liquid inlet is parallel or crossed to the second direction.

[0014] As a preferred embodiment, in the present application, at least one end of the first direction of the bottom plate protrudes towards the panel, and a plurality of baffles are arranged at intervals along the second direction.

[0015] As a preferred embodiment, in the present application, the number of the baffles is equal to the number of the fan structures arranged at the end of the first direction and one-to-one corresponding, and the setting direction of the baffle is different from the setting direction of the corresponding protruding edge.

[0016] As a preferred embodiment, in the present application, the plurality of fan structures are arranged in rows at the two ends of the first direction, and a plurality of scale structures are arranged at intervals towards the panel in the middle region of the bottom plate, the plurality of scale structures are arranged in rows along the first direction, and each row of scale structures extends along the second direction.

[0017] The scale structure comprises two protruding edges, one end of the two protruding edges is connected to a point and the other end extends towards different directions, the included angle formed by the two protruding edges is less than 180°, and the corresponding protruding edges of the plurality of scale structures extend towards the same direction.

[0018] As a preferred embodiment, in the present application, each row of fan blade structures and scale structures are arranged at equal intervals along the first direction, multiple fan blade structures and scale structures in each row are arranged at equal intervals along the second direction, and two adjacent rows of fan blade structures and / or scale structures are staggered.

[0019] The liquid cooling plate provided by this application has the following technical effects:

[0020] The present application forms several fan blade structures by extending three ridges from one point in different directions, which can form multiple flow channels in the cavity structure of the liquid cooling plate. The multiple flow channels are set in different directions. 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 liquid cooling plate, and thereby improving the service life and endurance of the lithium-ion battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of the liquid cooling plate of Example 1;

[0022] Figure 2 1 is a top view of the liquid cooling plate of Example 1;

[0023] Figure 3 2 is a top view of the liquid cooling plate of Example 2;

[0024] Figure 4 3 is a top view of the liquid cooling plate of Example 3;

[0025] Figure 5 This is a top view of the liquid cooling plate of Example 4.

[0026] Reference numerals:

[0027] 1. Bottom plate; 2. Blade structure; 21. First blade edge; 22. Second blade edge; 23. Third blade edge; 3. Raised edge; 4. Baffle; 5. Scale structure; 51. First scale-like edge; 52. Second scale-like edge. 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 liquid cooling plate, comprising: 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 base plate 1, wherein the panel and the base plate 1 are covered with each other 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 liquid cooling 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 base plate 1.

[0034] A plurality of fan blade structures 2 are protruded from the bottom plate 1 toward the panel at intervals. The fan blade structure 2 includes three ridges 3. One end of the three ridges 3 is connected to one point and the other end extends in different directions to form multiple flow channels between and within the plurality of fan blade structures 2.

[0035] The ridge 3 is a long strip structure. The three ridges 3 of the blade structure 2 are the first blade ridge 21, the second blade ridge 22 and the third blade ridge 23. One end of the first blade ridge 21, the second blade ridge 22 and the third blade ridge 23 are connected at one point, and the other end portions extend in different directions, so that the sum of the angles between the first blade ridge 21, the second blade ridge 22 and the third blade ridge 23 is 360°.

[0036] The plurality of blade structures 2 of this structure are dispersed on the base plate 1, and can form multiple flow channels in different directions between the plurality of blade structures 2 and within the blade 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 first blade edge 21, the second blade edge 22 and the third blade edge 23 many times, thereby changing the flow direction, diverting the flow, and mixing with the coolant in other flow channels, thereby 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 liquid cold plate, and thus improving the service life and endurance of the lithium-ion battery.

[0037] In this embodiment, corresponding ridges 3 of a plurality of blade structures 2 extend in the same direction, and the plurality of blade structures 2 are arranged in a row along a first direction, with each row of blade structures 2 extending along a second direction.

[0038] The first blade edges 21 of the plurality of blade structures 2 are all arranged in the same direction, the second blade edges 22 of the plurality of blade structures 2 are all arranged in the same direction, and the third blade edges 23 of the plurality of blade structures 2 are all arranged in the same direction, so that the plurality of blade structures 2 have the same structure. In this way, the plurality of blade structures 2 can be regularly arranged in rows on the base plate 1 and extend along the second direction. Thus, the plurality of blade structures 2 can regularly change the flow direction of the coolant, divert the flow, and mix the flow with the coolant in other flow channels, further increasing the uniformity of the coolant mixing and improving the heat dissipation effect of the liquid cold plate.

[0039] Furthermore, each row of blade structures 2 is arranged at equal intervals along the first direction, and adjacent rows of blade structures 2 are staggered. The staggered arrangement increases the number of flow channels, further enhancing the turbulence of the coolant and thus improving the heat exchange efficiency of the liquid cooling plate.

[0040] The multiple blade structures 2 in the same row are arranged at equal intervals along the second direction, and the spacing between two adjacent blade structures 2 in the same row is equal to the spacing between two adjacent blade structures 2 in any other row. In other words, in the second direction, adjacent blade structures 2 are distributed at the same spacing, making the distribution of the flow channels more regular and further improving the heat dissipation effect of the liquid cold plate.

[0041] On the basis of the above structure, the arrangement direction of the ridges 3 close to the liquid outlet is parallel to the second direction, and the arrangement direction of the ridges 3 close to the liquid inlet is intersecting with the second direction.

[0042] That is, the first blade edge 21 of the fan blade structure 2 is arranged along the second direction, the second blade edge 22 and the third blade edge 23 are symmetrically arranged on both sides of the first blade edge 21 in the first direction, and are inclined from the end of the first blade edge 21 close to the liquid inlet toward the liquid inlet, so that the angles between the first blade edge 21, the second blade edge 22 and the third blade edge 23 are all obtuse angles. In this way, the coolant entering the cavity structure from the liquid inlet will first be divided into two streamlines, the first stream flowing along the second direction, and the second stream flowing in a direction at an acute angle to the second direction. Then, during the flow process, it will be blocked by several fan blade structures 2 and change the flow direction, divert the flow, and mix with the coolant in other flow channels, so that the turbulence of the coolant is further enhanced, which is more conducive to improving the heat dissipation effect of the liquid cold plate. In addition, the coolant flows toward the liquid outlet along the second direction near the liquid outlet, which is conducive to the coolant flowing out of the cavity structure smoothly for the next cycle, thereby improving the cooling efficiency of the coolant.

[0043] Example 2

[0044] This embodiment refers to Figure 3 This embodiment also provides a liquid cooling plate. The difference between the structure of the liquid cooling plate and the structure of the liquid cooling plate in embodiment 1 is that:

[0045] First, the setting direction of the ridge 3 near the liquid inlet is parallel to the second direction. That is, at the end near the liquid inlet in the second direction, a ridge 3 arranged along the second direction is convexly provided on the bottom plate 1, and a plurality of ridges 3 are evenly spaced along the first direction. In this way, the coolant entering the cavity structure through the liquid inlet can be evenly diverted into two streams flowing along the second direction by the ridge 3, and then blocked by a number of fan blade structures 2 to change the flow direction, divert the flow, and mix with the coolant in other flow channels. After the coolant enters the cavity structure from the liquid inlet, it is evenly diverted, which is more conducive to improving the uniformity of the coolant mixing, thereby improving the uniformity of the coolant temperature and the heat exchange efficiency, achieving uniform heat dissipation of the liquid cooling plate, and thus improving the service life and endurance of the lithium-ion battery.

[0046] Second, a baffle 4 is provided protruding from at least one end of the base plate 1 in the first direction, facing the panel. Multiple baffles 4 are provided at intervals along the second direction. The provision of baffles 4 enables secondary diversion of the coolant at the end in the first direction, thereby increasing the turbulence intensity of the coolant at the edge of the liquid cooling plate in the first direction, thereby enhancing heat exchange.

[0047] Furthermore, the number of the baffles 4 is equal to that of the row of blade structures 2 located at the end, and the positions correspond one to one, and the setting direction of the baffles 4 is different from the setting direction of the corresponding ridges 3.

[0048] Since the first vane edge 21 is arranged along the second direction, the second vane edge 22 and the third vane edge 23 are symmetrically arranged on both sides of the first vane edge 21 along the first direction, and are arranged to be inclined towards the liquid inlet from the end of the first vane edge 21 close to the liquid inlet. Therefore, the baffle 4 is arranged to be inclined towards the liquid outlet, so that the baffle 4 is located between the first vane edge 21 and the second vane edge 22, and the included angle between the extension line of the baffle 4 and the first vane edge 21 and the second vane edge 22 is an acute angle and the angle is close. In this way, the cooling liquid flowing along the second vane edge 22 at the end of the first direction is uniformly divided into two flows along the baffle 4 and along the first vane edge 21 by the baffle 4, not only the degree of turbulent flow of the cooling liquid is strengthened, but also the mixing of the cooling liquid is more uniform, which is conducive to improving the heat dissipation effect.

[0049] Embodiment 3

[0050] This embodiment refers to Figure 4 This embodiment also provides a liquid cooling plate, which is different from the liquid cooling plate structure of embodiment 1 in that the spacing between the adjacent two vane structures 2 in the same row is not equal to the spacing between the adjacent two vane structures 2 in any other row.

[0051] It should be noted that on the basis of the equal spacing of the plurality of vane structures 2 in the same row along the second direction, the spacing can be unequal between the rows. This embodiment takes Figure 4 as an example to illustrate the two kinds of spacing.

[0052] Among them, the spacing between the adjacent two vane structures 2 in the same row is equal in the odd-numbered row and equal in the even-numbered row, but the spacing of the odd-numbered row and the even-numbered row is not equal, and the spacing of the even-numbered row is greater than that of the odd-numbered row. In this way, not only the pressure drop of the entire flow channel can be reduced, but also the width of the flow channel can be increased to increase the vortex formed by the cooling liquid at the other end of the first vane edge 21, thereby increasing the turbulent flow intensity, and the cooling liquid is mixed more uniformly after increasing the turbulent flow intensity in the wide flow channel, and then is divided into two flows in the narrow flow channel, which is conducive to enhancing the heat exchange effect of the liquid cooling plate.

[0053] Embodiment 4

[0054] This embodiment refers to Figure 5 This embodiment also provides a liquid cooling plate, which is different from the liquid cooling plate structure of embodiment 1 in that the plurality of vane structures 2 are arranged at both ends of the first direction, and the middle region of the bottom plate 1 is spaced apart from the panel by a plurality of scale structures 5, the plurality of scale structures 5 are arranged in rows along the first direction, and each row of scale structures extends along the second direction. The scale structure 5 includes two convex edges 3, one end of the two convex edges 3 is connected to a point and the other end extends towards different directions, the included angle formed by the two convex edges 3 is less than 180°, and the corresponding convex edges 3 of the plurality of scale structures 5 extend towards the same direction.

[0055] The two ridges 3 of the scale-like structure 5 are a first scale-like ridge 51 and a second scale-like ridge 52 . The first scale-like ridge 51 and the second scale-like ridge 52 are symmetrically arranged on both sides of the second direction and are inclined toward the liquid inlet to form a shape similar to ">".

[0056] Each row of blade structures 2 and scale structures 5 is arranged at equal intervals along the first direction, multiple blade structures 2 and scale structures 5 in each row are arranged at equal intervals along the second direction, and adjacent rows of blade structures 2 and / or scale structures 5 are staggered.

[0057] The fan blade structures 2 at each end can be arranged in only one row, or in two or more rows. The scale-like structures 5 are located in the middle area sandwiched between the rows of fan blade structures 2 at the end, and multiple rows are provided. On this basis, whether it is the fan blade structure 2 or the scale-like structure 5, the spacing between rows is equal, and the spacing between the individual structures in each row is equal, and they are staggered between the rows. In this way, the blocking structure of this embodiment not only has the fan blade structure 2 and the scale-like structure 5, but also can form a wider diamond structure ( Figure 5 As shown in the dotted box, the coolant flowing through the scale structure 5 is divided into three flow directions, which further improves the uniformity of coolant mixing, thereby improving the temperature uniformity of the coolant and increasing the turbulence intensity, thereby improving the heat exchange capacity of the liquid cold plate.

[0058] 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 liquid cooling plate, 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 fan blade structures (2) are protruded from the bottom plate (1) at intervals toward the panel, and the fan blade structures (2) include three ridges (3), one end of the three ridges (3) is connected to a point and the other end extends in different directions, so as to form a plurality of flow channels between the plurality of fan blade structures (2) and within the fan blade structures (2).

2. The liquid cooling plate according to claim 1, wherein: The corresponding ridges (3) of the plurality of blade structures (2) extend in the same direction, and the plurality of blade structures (2) are arranged in a row along a first direction, with each row of blade structures (2) extending along a second direction.

3. The liquid cooling plate according to claim 2, wherein: Each row of the fan blade structures (2) is arranged at equal intervals along the first direction, and two adjacent rows of the fan blade structures (2) are arranged in a staggered manner.

4. The liquid cooling plate according to claim 2 or 3, characterized in that: The plurality of blade structures (2) in the same row are arranged at equal intervals along the second direction, and the spacing between two adjacent blade structures (2) in the same row is equal to or unequal to the spacing between two adjacent blade structures (2) in any other row.

5. The liquid cooling plate according to claim 2 or 3, characterized in that: The liquid inlet and the liquid outlet are respectively located at two end portions of the liquid cooling plate in the second direction, and the ridge (3) close to the liquid outlet is arranged in a direction parallel to the second direction.

6. The liquid cooling plate according to claim 5, characterized in that: The arrangement direction of the ridge (3) close to the liquid inlet is parallel to or intersecting with the second direction.

7. The liquid cooling plate according to claim 2 or 3, characterized in that: At least one end portion of the bottom plate (1) in the first direction is provided with a baffle (4) protruding toward the panel, and a plurality of baffles (4) are provided at intervals along the second direction.

8. The liquid cooling plate according to claim 7, wherein: The number of the baffles (4) is equal to that of a row of the blade structures (2) located at the end, and their positions correspond one to one. The setting direction of the baffles (4) is different from the setting direction of the corresponding ridges (3).

9. The liquid cooling plate according to claim 2, wherein: The plurality of blade structures (2) are arranged in a row at both ends in the first direction, a plurality of scale-like structures (5) are protruded at intervals in the middle area of ​​the bottom plate (1) toward the panel, and the plurality of scale-like structures (5) are arranged in a row along the first direction, with each row of scale-like structures extending along the second direction; The scale-like structure (5) comprises two ridges (3), one end of the two ridges (3) is connected to one point and the other end extends in different directions, the angle formed by the two ridges (3) is less than 180°, and the corresponding ridges (3) of a plurality of the scale-like structures (5) extend in the same direction.

10. The liquid cooling plate according to claim 9, characterized in that: The fan blade structures (2) and the scale structures (5) in each row are arranged at equal intervals along a first direction, a plurality of the fan blade structures (2) and the scale structures (5) in each row are arranged at equal intervals along a second direction, and the fan blade structures (2) and / or the scale structures (5) in two adjacent rows are arranged in a staggered manner.

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