Liquid cooling plate and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a liquid cooling plate and a battery pack, the liquid cooling plate comprises a first flow channel, a second flow channel and a plurality of sub-flow channels, the sub-flow channels extend along a first direction, and each sub-flow channel comprises a first end and a second end which are oppositely arranged in the first direction. The sub-runners are arranged side by side in the second direction, and the first direction and the second direction are crossed; the first ends of the multiple sub-runners communicate with the first runner, and the second ends of the multiple sub-runners communicate with the second runner. According to the liquid cooling plate and the battery pack provided by the invention, each sub-runner is connected in parallel between the first runner and the second runner, so that the flowing path of fluid entering the sub-runners is only from one end of the liquid cooling plate in the first direction to the other end, and the flowing path of the fluid is effectively shortened; the fluid is prevented from flowing back and forth in the liquid cooling plate in a snake-shaped line mode, and the cooling efficiency of the liquid cooling plate and the overall temperature uniformity of the liquid cooling plate are effectively improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a liquid cooling plate and a battery pack. Background Art

[0002] As a core heat dissipation component that ensures that the battery modules in the battery pack can operate normally at an appropriate temperature, the liquid cold plate has the advantages of high heat transfer coefficient, large thermal energy, and fast cooling efficiency.

[0003] However, the cooling channels of current liquid cooling plates are typically arranged in a serpentine, reciprocating pattern (e.g., as disclosed in Chinese patent document CN220358198U). This results in a longer path for the cooling liquid to flow through the plate, a larger temperature difference between the cooling channel inlet and outlet, and poor overall temperature uniformity of the plate, significantly impacting the plate's heat dissipation efficiency. Utility Model Content

[0004] The purpose of this application is to provide a liquid cooling plate and a battery pack, so as to solve, to a certain extent, the technical problem existing in the prior art that the cooling channels of current liquid cooling plates are usually arranged in a serpentine linear reciprocating manner, which makes the cooling liquid flow through a longer path in the liquid cooling plate and the temperature difference between the cooling channel inlet and the cooling channel outlet is large, which leads to poor overall temperature uniformity of the liquid cooling plate, greatly affecting the heat dissipation efficiency of the liquid cooling plate.

[0005] According to a first aspect of the present application, there is provided a liquid cooling plate, comprising a first flow channel, a second flow channel, and a plurality of branch flow channels, wherein the plurality of branch flow channels extend along a first direction, and the branch flow channels comprise a first end and a second end disposed opposite to each other in the first direction;

[0006] The plurality of branch channels are arranged side by side along a second direction, and the first direction intersects the second direction;

[0007] The first ends of the plurality of branch flow channels are all communicated with the first flow channel, and the second ends of the plurality of branch flow channels are all communicated with the second flow channel.

[0008] Preferably, the first flow channel extends along the first direction, and the first flow channel is arranged between the plurality of branch flow channels;

[0009] The second flow channel extends along the second direction, and the second flow channel is provided at the end of the liquid cooling plate where the second end is located;

[0010] The liquid cooling plate further comprises:

[0011] a first external connection portion, disposed at an end of the first flow channel close to the second end and in communication with the first flow channel;

[0012] a second external connection portion, communicating with the first flow channel;

[0013] One of the first external connection portion and the second external connection portion is a liquid inlet of the liquid cooling plate, and the other of the first external connection portion and the second external connection portion is a liquid inlet of the liquid cooling plate.

[0014] Preferably, the liquid cooling plate includes a cooling plate and an end beam provided at one end of the cooling plate in the first direction;

[0015] The first flow channel and the plurality of branch flow channels are both arranged on the cooling plate, and the second flow channel is arranged on the end beam.

[0016] Preferably, a liquid hole connecting the second flow channel and the branch flow channel is provided on a side of the end beam facing the cooling plate.

[0017] Preferably, the cooling plate includes a first partition plate, a second partition plate, a first side wall, and a first plate body and a second plate body arranged facing each other, wherein the first side wall is arranged on a side of the cooling plate opposite to the end beam, and the first partition plate and the second partition plate are both arranged on the first plate body and the second plate body;

[0018] A plurality of first baffles are spaced apart along the second direction to divide the space between the first plate body and the second plate body into a plurality of the branch channels, and the first baffles and the end beams are spaced apart in the first direction;

[0019] The number of the second partitions is at least two, and the at least two second partitions are spaced apart along the second direction so that the first flow channel is formed between two adjacent second partitions. One end of the second partition is connected to the end beam, and the other end of the second partition is spaced apart from the first side wall in the first direction.

[0020] Preferably, the cooling plate further comprises a diverter plate, and the diverter plate is arranged between two adjacent second partition plates;

[0021] The diverter plate is spaced apart from the end beam;

[0022] The diverter plate is spaced apart from the first side wall.

[0023] Preferably, among the multiple first partitions arranged side by side and at intervals along the second direction, the distance between the first partition and the first side wall in the first direction gradually increases from the one farthest from the first flow channel to the one closest to the first flow channel.

[0024] Preferably, a distance between the first sidewall and one end of the second partition plate where the first end is located is greater than a maximum distance between the first partition plate and the first sidewall in the first direction.

[0025] Preferably, the distance between the diverter plate and the first side wall in the first direction is smaller than the distance between the first end of the second partition plate and the first side wall.

[0026] According to the second aspect of the present application, a battery pack is provided, comprising the liquid cooling plate described in any of the above technical solutions, and thus having all the beneficial technical effects of the liquid cooling plate, which will not be described in detail here.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] The liquid cooling plate provided by the present application is provided with a plurality of shunt channels extending along a first direction on the liquid cooling plate, so that the plurality of shunt channels are arranged side by side along a second direction. The first end of each shunt channel is connected to the first channel, and the second end of each shunt channel is connected to the first channel. In this way, each shunt channel is connected in parallel between the first channel and the second channel, so that the flow path of the fluid entering the shunt channel is only from one end of the liquid cooling plate in the first direction to the other end, which effectively shortens the flow path of the fluid, avoids the fluid from flowing back and forth in the liquid cooling plate in a serpentine manner, and effectively improves the cooling efficiency of the liquid cooling plate and the overall temperature uniformity of the liquid cooling plate.

[0029] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 A schematic cross-sectional view of the liquid cooling plate provided in an embodiment of the present application;

[0032] Figure 2 This is a schematic diagram of the axonometric structure of the liquid cooling plate provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the partial structure of the liquid cooling plate provided in an embodiment of the present application;

[0034] Figure 4A schematic diagram of the working principle of the liquid cooling plate provided in an embodiment of the present application;

[0035] Figure 5 This is another schematic diagram of the working principle of the liquid cooling plate provided in an embodiment of the present application.

[0036] Reference numerals:

[0037] 1-Cooling plate; 11-First plate body; 12-Second plate body; 13-Second side wall; 14-First side wall; 15-First partition plate; 151-First flow gap; 152-Second flow gap; 16-Second partition plate; 17-Diverter plate; 171-Converging gap; 172-Connecting gap; 2-End beam; 21-Liquid hole; 3-First external connection portion; 4-Second external connection portion;

[0038] 10-first flow channel; 20-second flow channel; 30-dividing flow channel;

[0039] F1-first direction; F2-second direction; F3-third direction. DETAILED DESCRIPTION

[0040] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0041] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0042] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0043] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0045] Refer to the following Figures 1 to 5 The present invention describes a liquid cooling plate and a battery pack according to some embodiments of the present application.

[0046] See also Figures 1 to 5 As shown, an embodiment of the first aspect of the present application provides a liquid cooling plate, comprising a first flow channel 10, a second flow channel 20, and a plurality of branch flow channels 30. The plurality of branch flow channels 30 extend along a first direction F1 and include first and second ends opposite each other in the first direction F1. The plurality of branch flow channels 30 are arranged side by side along a second direction F2, intersecting the first and second directions F2. The first ends of the plurality of branch flow channels 30 are connected to the first flow channel 10, and the second ends of the plurality of branch flow channels 30 are connected to the second flow channel 20.

[0047] The liquid cooling plate provided by the above technical features is provided with a plurality of branch channels 30 extending along the first direction F1 on the liquid cooling plate, so that the plurality of branch channels 30 are arranged side by side along the second direction F2. The first end of each branch channel 30 is connected to the first channel 10, and the second end of each branch channel 30 is connected to the first channel 10. In this way, each branch channel 30 is connected in parallel between the first channel 10 and the second channel 20. The fluid entering the branch channel 30 flows only from one end of the liquid cooling plate to the other end in the first direction F1, effectively shortening the fluid flow path, preventing the fluid from flowing back and forth in a serpentine manner within the liquid cooling plate, and effectively improving the cooling efficiency of the liquid cooling plate and the overall temperature uniformity of the liquid cooling plate.

[0048] like Figures 1 to 5 As shown, F1 shown in the figure may be an example of the first direction F1, and F2 shown in the figure may be an example of the second direction F2. The first direction F1 and the second direction F2 may be arranged crosswise. Figures 1 to 5 As shown, the first direction F1 and the second direction F2 can be set perpendicularly to accommodate most square liquid cooling plate structures. For ease of description, the direction intersecting the plane defined by the first direction F1 and the second direction F2 is defined as a third direction F3. The F3 shown in the figure can be an example of the third direction F3. Preferably, as Figures 1 to 5As shown, the third direction F3 can be perpendicular to the plane defined by the first direction F1 and the second direction F2, so as to adapt to most square liquid cooling plate structures.

[0049] Preferably, the liquid cooling plate may include a cooling plate 1, and the first flow channel 10 and the plurality of branch flow channels 30 may be both provided on the cooling plate 1. Figure 3 As shown, the cooling plate 1 may include a first plate body 11, a second plate body 12 and a first partition 15, the first plate body 11 and the second plate body 12 are arranged facing each other along a third direction F3, the first partition 15 is arranged between the first plate body 11 and the second plate body 12, and the two ends of the first partition 15 in the third direction F3 are respectively connected to the first plate body 11 and the second plate body 12, and a plurality of first partitions 15 are arranged at intervals along the second direction F2 to separate the space between the first plate body 11 and the second plate body 12 into the above-mentioned multiple branch channels 30.

[0050] Preferably, if Figure 1 、 Figure 4 and Figure 5 As shown, the first flow channel 10 may extend along the first direction F1, and the first flow channel 10 may be disposed between the plurality of branch flow channels 30. Figure 2 and Figure 3 As shown, the liquid cooling plate may further include a first external connection portion 3, which is disposed at one end of the first flow channel 10 near the second end and communicates with the first flow channel 10 to allow fluid to flow into or out of the first flow channel 10. Thus, disposing the first flow channel 10 between the multiple branch flow channels 30 ensures uniform and smooth fluid interaction between the first flow channel 10 and each branch flow channel 30. Furthermore, the direction of fluid flow within the first flow channel 10 is opposite to that within the branch flow channels 30, effectively reducing the temperature difference between the two ends of the liquid cooling plate in the first direction F1 and further improving the overall temperature uniformity of the liquid cooling plate.

[0051] Preferably, if Figure 1 、 Figure 4 and Figure 5 As shown, the second flow channel 20 can extend along the second direction F2 and is disposed at the end of the liquid cooling plate where the second end is located. The liquid cooling plate can also include a second external connection portion 4 connected to the first flow channel 10 to allow fluid to flow into or out of the second flow channel 20. This not only facilitates communication between the second end of the branch channel 30 and the second flow channel 20, but also allows both the first external connection portion 3 and the second external connection portion 4 to be disposed on the side of the liquid cooling plate where the second end is located, effectively facilitating the wiring layout of the liquid cooling plate.

[0052] like Figure 4As shown in the figure, an example is shown in which the first flow channel 10 is an inlet flow channel of the liquid cooling plate and the second flow channel 20 is an outlet flow channel of the liquid cooling plate.

[0053] like Figure 5 As shown, the figure shows an example in which the second flow channel 20 is the inlet flow channel of the liquid cooling plate and the first flow channel 10 is the outlet flow channel of the liquid cooling plate.

[0054] Preferably, if Figure 1 、 Figure 4 and Figure 5 As shown, the above-mentioned cooling plate 1 can also include two second partitions 16, and the two second partitions 16 are arranged at intervals along the second direction F2. The two ends of the second partition 16 in the third direction F3 are respectively connected to the first plate body 11 and the second plate body 12, so that the above-mentioned first flow channel 10 is formed between the two second partitions 16.

[0055] It should be noted that the number of first flow channels 10 is not limited to the single example shown in the figure. The number of first flow channels 10 can be adaptively adjusted based on the size of the liquid cooling plate and the fluid flow rate. For example, the number of first flow channels 10 can be 2, 3, or more. Correspondingly, the number of second baffles 16 can be adaptively adjusted based on the number of first flow channels 10. For example, the number can be 4, 6, or more.

[0056] Preferably, if Figures 1 to 5 As shown, the liquid cooling plate may further include an end beam 2 provided at one end of the cooling plate 1 in the first direction F1 , and the second flow channel 20 is provided at the end beam 2 .

[0057] Preferably, if Figure 1 、 Figure 4 and Figure 5 As shown, one end of the second partition plate 16 is connected to the end beam 2 to separate the first flow channel 10 from the second end of the branch channel 30. The other end of the second partition plate 16 is spaced from the first side wall 14 in the first direction F1 to achieve communication between the first flow channel 10 and the first end of the branch channel 30.

[0058] Preferably, if Figure 1 、 Figure 4 and Figure 5 As shown, the first flow channel 10 may be disposed at the center line of the liquid cooling plate in the second direction F2 , thereby further improving the uniformity and smoothness of the fluid interaction between the first flow channel 10 and each branch flow channel 30 .

[0059] Preferably, if Figure 1 ,and Figures 3 to 5As shown, a liquid hole 21 connecting the second flow channel 20 and the branch flow channel 30 is provided on the side of the end beam 2 facing the cooling plate 1 to achieve communication between the end beam 2 and the cooling plate 1 .

[0060] Optionally, a plurality of liquid holes 21 may be provided on the end beam 2 to improve the fluid interaction between the second flow channel 20 and the branch flow channel 30. Figure 1 、 Figure 4 and Figure 5 As shown, the liquid holes 21 are provided on both sides of the first flow channel 10 to ensure smooth communication between the second flow channel 20 and the branch flow channels 30 of the cooling plate 1 located on the left and right sides of the first flow channel 10 .

[0061] Preferably, if Figure 1 、 Figure 4 and Figure 5 As shown, the first partition 15 and the end beam 2 are spaced apart in the first direction F1, so that a first flow gap 151 can be formed between the end where the second end of the first partition 15 is located and the end beam 2, and the second end of each of the above-mentioned branch channels 30 can be connected one by one with the second flow channel 20 in the end beam 2 through the first flow gap 151 and the connecting hole.

[0062] Preferably, if Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the above-mentioned cooling plate 1 can also include a second side wall 13 and a first side wall 14. The second side wall 13 is arranged on both sides of the cooling plate 1 in the second direction F2, and the first side wall 14 is arranged on the side of the cooling plate 1 opposite to the end beam 2. The end beam 2, the second side wall 13, the first side wall 14, the first plate body 11 and the second plate body 12 are arranged to form a closed space of the liquid cooling plate for accommodating fluid.

[0063] Preferably, if Figure 1 、 Figure 4 and Figure 5 As shown, the first partition 15 and the first side wall 14 are also spaced apart in the first direction F1, so that a second flow gap 152 can be formed between the end where the first end of the first partition 15 is located and the first side wall 14, and the first flow channel 10 can be connected to the first end of each branch channel 30 through the second flow gap 152.

[0064] Preferably, if Figure 1 、 Figure 4 and Figure 5As shown, among the multiple first partitions 15 arranged side by side and at intervals along the second direction F2, the size of the above-mentioned second flow gap 152 in the first direction F1 gradually increases from the one farthest from the first flow channel 10 to the one closest to the first flow channel 10, so as to ensure the smoothness of the interaction between the first flow channel 10 and the first ends of the multiple branch channels 30.

[0065] Preferably, if Figure 1 、 Figure 4 and Figure 5 As shown, the distance between the first end of the second partition 16 and the first side wall 14 is greater than the maximum size of the second flow gap 152 in the first direction F1, so as to further improve the smoothness of the interaction between the first flow channel 10 and the first ends of the multiple branch channels 30.

[0066] Preferably, if Figure 1 、 Figure 4 and Figure 5 As shown, the cooling plate 1 may further include a diverter plate 17, which is disposed between two adjacent second partitions. In other words, the diverter plate 17 may be disposed within the first flow channel 10. The diverter plate 17 separates and diverts the fluid within the first flow channel 10, thereby ensuring uniform distribution of the fluid on both sides of the first flow channel 10 of the liquid cooling plate.

[0067] Preferably, if Figure 1 、 Figure 4 and Figure 5 As shown, the diverter plate 17 is spaced apart from the end beam 2. A confluence gap 171 is formed between the end of the diverter plate 17 at the second end and the end beam 2. Figure 3 As shown, the first external connection portion 3 can be in communication with the converging gap 171 , so that the left and right portions of the first flow channel 10 located on the diverter plate 17 can both be in communication with the first external connection portion 3 .

[0068] Preferably, if Figure 1 、 Figure 4 and Figure 5 As shown, the diverter plate 17 is spaced apart from the first side wall 14 to form a connecting gap 172 between the end of the diverter plate 17 where the first end is located and the first side wall 14, so as to achieve communication between the second flow gaps 152 located on the left and right sides of the first flow channel 10, thereby improving the temperature uniformity of the end of the liquid cooling plate where the first end is located.

[0069] Preferably, if Figure 1 、 Figure 4 and Figure 5As shown, the size of the above-mentioned connecting gap 172 in the first direction F1 is smaller than the distance between the end of the second partition 16 at the first end and the first side wall 14. In other words, at least a portion of the end of the above-mentioned diverter plate 17 close to the first side wall 14 extends out of the first flow channel 10 along the first direction F1. In this way, it can effectively slow down the generation of counter-vortexes caused by the opposite flow directions of the fluids on both sides of the diverter plate 17, so as to further improve the smoothness of the fluid interaction between the first flow channel 10 and the second flow gap 152.

[0070] An embodiment of the second aspect of the present application further provides a battery pack, comprising the liquid cooling plate described in any of the above embodiments, and thus having all the beneficial technical effects of the liquid cooling plate, which will not be described in detail here.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A liquid cooling plate, characterized in that: The device comprises a first flow channel, a second flow channel and a plurality of branch flow channels, wherein the plurality of branch flow channels extend along a first direction, and the branch flow channels comprise a first end and a second end disposed opposite to each other in the first direction; The plurality of branch channels are arranged side by side along a second direction, and the first direction intersects the second direction; The first ends of the plurality of branch flow channels are all communicated with the first flow channel, and the second ends of the plurality of branch flow channels are all communicated with the second flow channel.

2. The liquid cooling plate according to claim 1, wherein: The first flow channel extends along the first direction, and the first flow channel is arranged between the plurality of branch flow channels; The second flow channel extends along the second direction, and the second flow channel is provided at the end of the liquid cooling plate where the second end is located; The liquid cooling plate further comprises: a first external connection portion, disposed at an end of the first flow channel close to the second end and in communication with the first flow channel; a second external connection portion, communicating with the first flow channel; One of the first external connection portion and the second external connection portion is a liquid inlet of the liquid cooling plate, and the other of the first external connection portion and the second external connection portion is a liquid inlet of the liquid cooling plate.

3. The liquid cooling plate according to claim 1 or 2, characterized in that: The liquid cooling plate includes a cooling plate and an end beam provided at one end of the cooling plate in the first direction; The first flow channel and the plurality of branch flow channels are both arranged on the cooling plate, and the second flow channel is arranged on the end beam.

4. The liquid cooling plate according to claim 3, wherein: A liquid hole communicating with the second flow channel and the branch flow channel is provided on a side of the end beam facing the cooling plate.

5. The liquid cooling plate according to claim 3, wherein: The cooling plate includes a first partition plate, a second partition plate, a first side wall, and a first plate body and a second plate body facing each other, wherein the first side wall is arranged on a side of the cooling plate opposite to the end beam, and the first partition plate and the second partition plate are both arranged on the first plate body and the second plate body; A plurality of first baffles are spaced apart along the second direction to divide the space between the first plate body and the second plate body into a plurality of the branch channels, and the first baffles and the end beams are spaced apart in the first direction; The number of the second partitions is at least two, and the at least two second partitions are spaced apart along the second direction so that the first flow channel is formed between two adjacent second partitions. One end of the second partition is connected to the end beam, and the other end of the second partition is spaced apart from the first side wall in the first direction.

6. The liquid cooling plate according to claim 5, characterized in that: The cooling plate further includes a diverter plate, which is arranged between two adjacent second partition plates; The diverter plate is spaced apart from the end beam; The diverter plate is spaced apart from the first side wall.

7. The liquid cooling plate according to claim 5, wherein: Among the plurality of first partitions arranged side by side and spaced apart along the second direction, the distance between the first partition and the first side wall in the first direction gradually increases from the one farthest from the first flow channel to the one closest to the first flow channel.

8. The liquid cooling plate according to claim 7, wherein: A distance between an end of the second partition plate where the first end is located and the first side wall is greater than a maximum distance between the first partition plate and the first side wall in the first direction.

9. The liquid cooling plate according to claim 6, wherein: The distance between the diverter plate and the first side wall in the first direction is smaller than the distance between the first end of the second partition plate and the first side wall.

10. A battery pack, characterized in that: The liquid cooling plate comprises the liquid cooling plate according to any one of claims 1 to 9.

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