Liquid cooling plate and battery pack

Abstract

The application relates to the technical field of heat exchange, in particular to a liquid cooling plate and a battery pack. The liquid cooling plate comprises a heat exchange flow channel, the heat exchange flow channel comprises a liquid inlet cavity, a liquid outlet cavity, a first flow-through cavity, a second flow-through cavity, a first flow channel group and a second flow channel group. The first flow channel group and the second flow channel group each comprise at least one inlet flow channel and at least one outlet flow channel, one end of the inlet flow channel in the first flow channel group is communicated with the liquid inlet cavity, the other end is sequentially connected with the liquid outlet cavity in series through the first flow-through cavity and the corresponding outlet flow channel, one end of the inlet flow channel in the second flow channel group is communicated with the liquid inlet cavity, the other end is sequentially connected with the liquid outlet cavity in series through the second flow-through cavity and the corresponding outlet flow channel; wherein the flow directions of the refrigerants in the inlet flow channel and the outlet flow channel are opposite, and at least one inlet flow channel is arranged close to the outlet flow channel along a second preset direction. The liquid cooling plate and the battery pack provided by the application solve the problem that a large temperature difference exists during heat exchange of the existing liquid cooling plate.

Description

Technical Field

[0001] This application relates to the field of heat exchange technology, and in particular to a liquid cooling plate and a battery pack. Background Technology

[0002] As the core power component of new energy vehicles, the temperature change of the battery pack directly affects the safety of the vehicle. The battery pack usually includes battery modules and liquid cooling plates. The refrigerant flowing inside the liquid cooling plates exchanges heat with the battery modules and absorbs the heat generated by the battery modules during operation, thereby achieving temperature control of the battery pack.

[0003] In related technologies, the refrigerant flow path within the liquid cooling plate is typically in series, forming an continuously extending S-shaped configuration. This causes the refrigerant temperature to rise continuously as it flows from the inlet to the outlet, absorbing heat and leading to a gradual decrease in heat transfer efficiency. Consequently, the battery pack experiences a significant temperature difference between the refrigerant inlet and outlet, greatly impacting its performance and lifespan. Utility Model Content

[0004] Therefore, it is necessary to provide a liquid cooling plate and battery pack to solve the problem of large temperature difference during heat exchange of existing liquid cooling plates.

[0005] This application provides a liquid-cooled plate, which includes heat exchange channels. The heat exchange channels include an inlet chamber, an outlet chamber, a first flow chamber, a second flow chamber, a first channel group, and a second channel group. The inlet chamber and the outlet chamber are located on one side of the first channel group and the second channel group along a first preset direction. The first flow chamber and the second flow chamber are located on the other side of the first channel group and the second channel group along the first preset direction, and the first flow chamber and the second flow chamber are not connected. Both the first channel group and the second channel group include at least one inlet channel and at least one outlet channel. The first channel group... One end of the inlet channel is connected to the liquid inlet chamber, and the other end is connected in series with the liquid outlet chamber through the first flow chamber and the corresponding outlet channel in sequence. One end of the inlet channel in the second channel group is connected to the liquid inlet chamber, and the other end is connected in series with the liquid outlet chamber through the second flow chamber and the corresponding outlet channel in sequence. The refrigerant flows in opposite directions in the inlet channel and the outlet channel, and at least one inlet channel of one of the first channel group and the second channel group is arranged close to the outlet channel of the other along a second preset direction. The first preset direction and the second preset direction are arranged at an angle.

[0006] In one embodiment, the inlet chamber and the outlet chamber are distributed along the first preset direction; or, the inlet chamber and the outlet chamber are distributed along a third preset direction, the third preset direction being set at an angle to the first preset direction and the second preset direction.

[0007] In one embodiment, the liquid cooling plate includes a first manifold, which includes a first branch pipe and a second branch pipe. The liquid inlet chamber is located in the first branch pipe, and the liquid outlet chamber is located in the second branch pipe. The first branch pipe and the second branch pipe are separately configured and fixedly connected.

[0008] In one embodiment, the liquid cooling plate includes a first manifold, and a first partition is provided inside the first manifold to divide the internal cavity of the first manifold into the liquid inlet cavity and the liquid outlet cavity.

[0009] In one embodiment, the first flow cavity and the second flow cavity are distributed along the first preset direction, or the first flow cavity and the second flow cavity are distributed along the second preset direction, or the first flow cavity and the second flow cavity are distributed along a third preset direction, wherein the third preset direction is set at an angle to the first preset direction and the second preset direction.

[0010] In one embodiment, the liquid cooling plate further includes a second manifold, which includes a third branch pipe and a fourth branch pipe. A first flow cavity is disposed in the third branch pipe, and a second flow cavity is disposed in the fourth branch pipe. The third branch pipe and the fourth branch pipe are separately disposed and fixedly connected.

[0011] In one embodiment, the liquid cooling plate further includes a second manifold, the second manifold having a second partition, the second partition dividing the internal cavity of the second manifold into the first flow cavity and the second flow cavity.

[0012] In one embodiment, the number of inlet channels in the first channel group is one or more, and the number of outlet channels in the first channel group corresponds one-to-one with the number of inlet channels; the number of inlet channels and outlet channels in the second channel group corresponds one-to-one with the number of inlet channels and outlet channels in the first channel group, respectively; and each inlet channel in one of the first channel group and the second channel group is arranged along the second preset direction close to at least one outlet channel of the other, and at least some of the inlet channels and outlet channels are arranged alternately in sequence.

[0013] In one embodiment, the first flow channel group includes two inlet flow channels and two outlet flow channels, and the two inlet flow channels in the first flow channel group are both defined as P1 and the two outlet flow channels are both defined as Q1; the second flow channel group includes two inlet flow channels and two outlet flow channels, and the two inlet flow channels in the second flow channel group are both defined as P2 and the two outlet flow channels are both defined as Q2; wherein, along the second preset direction, P1, Q2, P1, Q2, Q1, P2, Q1 and P2 are arranged sequentially, or Q1, P2, Q1, P2, P1, Q2, P1 and Q2 are arranged sequentially.

[0014] In one embodiment, the number of inlet channels in the first channel group is one or more, and the number of outlet channels in the first channel group corresponds one-to-one with the number of inlet channels. The inlet channels and outlet channels in the first channel group are alternately arranged along a second preset direction. Similarly, the number of inlet channels in the second channel group is one or more, and the number of outlet channels in the second channel group corresponds one-to-one with the number of inlet channels. The inlet channels and outlet channels in the second channel group are alternately arranged along a second preset direction. In this embodiment, the inlet channels of one of the first channel group and the second channel group are arranged along the second preset direction close to the outlet channels of the other.

[0015] In one embodiment, the first flow channel group and the second flow channel group are arranged at intervals along the second preset direction.

[0016] In one embodiment, the first flow channel group includes one inlet flow channel and one outlet flow channel, and the inlet flow channel in the first flow channel group is defined as P1 and the outlet flow channel is defined as Q1; the second flow channel group includes one inlet flow channel and one outlet flow channel, and the inlet flow channel in the second flow channel group is defined as P2 and the outlet flow channel is defined as Q2; wherein, along the second preset direction, Q1, P1, Q2 and P2 are arranged sequentially; or, the first flow channel group includes two inlet flow channels and two outlet flow channels, and both inlet flow channels in the first flow channel group are defined as P1 and both outlet flow channels are defined as Q1; the second flow channel group includes two inlet flow channels and two outlet flow channels, and both inlet flow channels in the second flow channel group are defined as P2 and both outlet flow channels are defined as Q2; wherein, Q1, P1, Q1, P1, Q2, P2, Q2 and P2 are arranged sequentially.

[0017] In one embodiment, the liquid cooling plate includes at least two flat tube groups, which are spaced apart along the second preset direction; each flat tube group includes at least one inlet pipe and at least one outlet pipe, the inlet flow channel being disposed in the inlet pipe and the outlet flow channel being disposed in the outlet pipe; wherein the distance between adjacent inlet pipes and outlet pipes in the flat tube group is A, and 5mm≤A≤40mm; and / or, the distance between adjacent flat tube groups is B, and 5mm≤B≤100mm.

[0018] In one embodiment, the number of the flat tube groups is defined as N, the width of the inlet tube or the outlet tube is W, and the total number of the inlet tube and the outlet tube is L; where B = [175 × NW × LA × (L-1) × N] / (N-1).

[0019] This application also provides a battery pack, which includes a battery module and a liquid cooling plate as described in any of the above embodiments, wherein the battery module is mounted on the liquid cooling plate.

[0020] Compared with existing technologies, the liquid cooling plate and battery pack provided in this application each consist of at least two channels in the first and second flow channel groups, and their respective inlet and outlet flow channels can be connected through the first and second flow chambers to form a U-shaped heat exchange path. Thus, compared with traditional structures, this application effectively shortens the length of each heat exchange path, ensuring that the refrigerant does not overheat during heat absorption from the inlet to the outlet of each heat exchange path, thereby improving the consistency of refrigerant heat transfer efficiency. Furthermore, the two flow channel groups can cross-exchange heat through the inlet and outlet flow channels. Since the inlet flow channel has a lower temperature and the outlet flow channel has a higher temperature, by setting at least one inlet flow channel in one flow channel group close to the outlet flow channel of the other flow channel group along a second preset direction, the heat exchange effect at the outlet flow channel can be further guaranteed, reducing temperature difference changes and achieving uniform heat dissipation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A top view of a liquid cooling plate according to an embodiment provided in this application;

[0023] Figure 2 for Figure 1 A front view of the liquid cooling plate shown;

[0024] Figure 3 for Figure 1 A partial schematic diagram of the liquid cooling plate shown;

[0025] Figure 4 A top view of a liquid cooling plate according to an embodiment provided in this application;

[0026] Figure 5 for Figure 4 A front view of the liquid cooling plate shown;

[0027] Figure 6 for Figure 4 A partial schematic diagram of the liquid cooling plate shown;

[0028] Figure 7 A top view of a liquid cooling plate according to an embodiment provided in this application;

[0029] Figure 8 for Figure 7 A front view of the liquid cooling plate shown;

[0030] Figure 9 for Figure 7 A partial schematic diagram of the liquid cooling plate shown;

[0031] Figure 10 A top view of a liquid cooling plate according to an embodiment provided in this application;

[0032] Figure 11 A partial schematic diagram of a liquid cooling plate according to an embodiment provided in this application.

[0033] The symbols in the diagram represent the following meanings:

[0034] 100. Liquid cooling plate; 10. First manifold; 101. Liquid inlet chamber; 102. Liquid outlet chamber; 11. First branch pipe; 12. Second branch pipe; 13. First partition plate; 20. Second manifold; 201. First flow chamber; 202. Second flow chamber; 21. Third branch pipe; 22. Fourth branch pipe; 23. Second partition plate; 24. Third partition plate; 30. Flat tube assembly; 301. First flow channel assembly; 302. Second flow channel assembly; 31. Inlet pipe; 3101. Inlet flow channel; 32. Outlet pipe; 3201. Outlet flow channel; 33. Transfer pipe. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0040] As the core power component of new energy vehicles, the temperature change of the battery pack directly affects the safety of the vehicle. The battery pack usually includes battery modules and liquid cooling plates. The refrigerant flowing inside the liquid cooling plates exchanges heat with the battery modules and absorbs the heat generated by the battery modules during operation, thereby achieving temperature control of the battery pack.

[0041] In related technologies, the refrigerant flow path within the liquid cooling plate is typically in series, forming an continuously extending S-shaped configuration. This causes the refrigerant temperature to rise continuously as it flows from the inlet to the outlet, absorbing heat and leading to a gradual decrease in heat transfer efficiency. Consequently, the battery pack experiences a significant temperature difference between the refrigerant inlet and outlet, greatly impacting its performance and lifespan.

[0042] Please see Figures 1-11 To address the issue of large temperature differences during heat exchange in existing liquid cooling plates, this application provides a liquid cooling plate 100. The liquid cooling plate 100 includes heat exchange channels, which include an inlet chamber 101, an outlet chamber 102, a first flow chamber 201, a second flow chamber 202, a first flow channel group 301, and a second flow channel group 302. The inlet chamber 101 and the outlet chamber 102 are located on one side of the first flow channel group 301 and the second flow channel group 302 along a first preset direction. The first flow chamber 201 and the second flow chamber 202 are located on the other side of the first flow channel group 301 and the second flow channel group 302 along the first preset direction, and the first flow chamber 201 and the second flow chamber 202 are not connected. The first flow channel group 301 and the second flow channel group 302 each include at least one inlet flow channel 3101 and at least one outlet flow channel 3201. One end of the inlet flow channel 3101 in the first flow channel group 301 is connected to the liquid inlet chamber 101, and the other end is connected in series with the liquid outlet chamber 102 via a first flow chamber 201 and a corresponding outlet flow channel 3201. Similarly, one end of the inlet flow channel 3101 in the second flow channel group 302 is connected to the liquid inlet chamber 101, and the other end is connected in series with the liquid outlet chamber 102 via a second flow chamber 202 and a corresponding outlet flow channel 3201. The refrigerant flows in opposite directions in the inlet flow channel 3101 and the outlet flow channel 3201. At least one inlet flow channel 3101 of one of the first flow channel groups 301 and the second flow channel group 302 is positioned along a second preset direction close to the outlet flow channel 3201 of the other, with the first preset direction and the second preset direction forming an angle.

[0043] Specifically, the liquid cooling plate 100 includes a first manifold 10, a second manifold 20, and multiple flat tubes. The first manifold 10 and the second manifold 20 extend along a second preset direction and are spaced apart along a first preset direction. The inlet chamber 101 and the outlet chamber 102 can be located within the first manifold 10, and the first flow chamber 201 and the second flow chamber 202 can be located within the second manifold 20. The first flow channel group 301 and the second flow channel group 302 are formed by the cooperation of multiple flat tubes. Each flat tube serves as either an inlet flow channel 3101 or an outlet flow channel 3201. The flat tube has a structure with multiple independent cavities inside, and its surface is flat, making it easy to fit with the heating element and providing high heat exchange performance. Furthermore, this application divides the multiple flat tubes into multiple flow channel groups according to the different flow requirements of the refrigerant.

[0044] It is understood that both the first flow channel group 301 and the second flow channel group 302 consist of at least two flow channels, and their respective inlet flow channel 3101 and outlet flow channel 3201 can be connected through the first flow cavity 201 and the second flow cavity 202, thereby forming a U-shaped heat exchange flow path. Thus, compared to the traditional structure, this application effectively shortens the length of each heat exchange flow path, ensuring that the refrigerant does not overheat during the heat absorption process from the inlet to the outlet of each heat exchange flow path, thereby improving the consistency of refrigerant heat transfer efficiency. Furthermore, the two flow channel groups can cross-exchange heat through the inlet flow channel 3101 and the outlet flow channel 3201. Since the temperature of the inlet flow channel 3101 is lower than that of the outlet flow channel 3201, by setting at least one inlet flow channel 3101 in one flow channel group close to the outlet flow channel 3201 of the other flow channel group along a second preset direction, the heat exchange effect at the outlet flow channel 3201 can be further guaranteed, reducing temperature difference changes and achieving uniform heat dissipation.

[0045] Furthermore, in one embodiment, a first flow channel group 301 and a second flow channel group 302 form a heat exchange unit, and the number of heat exchange units can be one or more. If there are multiple heat exchange units, they can be arranged at intervals along a second preset direction and connected in parallel. In this way, multiple heat exchange units can achieve the same heat dissipation effect, thereby further improving the consistency of heat dissipation at various points on the liquid cooling plate 100. Since the multiple flow channel groups all achieve refrigerant diversion through the corresponding flow cavity on the second manifold 20, in order to avoid the corresponding flow paths of multiple heat exchange units being connected in series and affecting the heat exchange effect, a third baffle 24 can be provided on a second manifold 20 to isolate the corresponding flow paths of multiple heat exchange units. Of course, multiple second manifolds 20 can also be provided, which is not limited here.

[0046] Typically, the liquid cooling plate 100 provided in this application can be applied to a battery pack to achieve heat exchange for the battery modules within the battery pack. In a battery pack, there are often multiple battery modules, which can be arranged in rows at intervals along a first preset direction, with one or more battery modules arranged in each row. It is easy to understand that the heat generated by the battery modules during operation is the main cause of heat within the battery pack. Based on this, the flat tubes on the liquid cooling plate 100 can be installed corresponding to the positions of the battery modules to achieve a better heat exchange effect. For example, in this embodiment, the liquid cooling plate 100 includes at least two flat tube groups 30, which are spaced apart along a second preset direction. Each flat tube group 30 includes at least one inlet pipe 31 and at least one outlet pipe 32. An inlet flow channel 3101 is located within the inlet pipe 31, and an outlet flow channel 3201 is located within the outlet pipe 32. Here, one flat tube group 30 can correspond to one battery module, or multiple flat tube groups 30 can correspond to one battery module. Furthermore, the flat tube assembly 30 may include an inlet pipe 31 and an outlet pipe 32 of the same flow channel assembly, or an inlet pipe 31 and an outlet pipe 32 of different flow channel assemblies.

[0047] To facilitate the installation of the flat tubes within the flat tube assembly 30, in one embodiment, such as... Figure 11 As shown, the distance between adjacent inlet pipes 31 and outlet pipes 32 within the flat tube assembly 30 is A, that is, the distance between adjacent flat tubes within the flat tube assembly 30 is A, and 5mm≤A≤40mm. This facilitates concentrated heat dissipation of the flat tube assembly 30 and improves heat dissipation efficiency. However, if A>40mm, the distance between adjacent flat tubes is too large, reducing the contact area between the flat tube assembly 30 and heat-generating elements such as the battery module, thus affecting heat exchange and preventing effective temperature reduction of these elements, impacting performance. If A<5mm, the distance between adjacent flat tubes is too small, making them prone to deformation when connected to the first manifold 10 or the second manifold 20, affecting assembly and posing a higher risk of leakage.

[0048] Optionally, the spacing A between adjacent flat tubes within the flat tube group 30 can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm or 40mm, etc., which will not be listed here.

[0049] Furthermore, in one embodiment, as Figure 11As shown, the spacing between adjacent flat tube groups 30 is B, and 5mm ≤ B ≤ 100mm. This ensures the structural strength of the liquid cooling plate 100 while controlling costs. If B > 100mm, the spacing between adjacent flat tube groups 30 is too large, which not only increases the space occupied by the liquid cooling plate 100 but also reduces its strength, resulting in decreased bending resistance. If B < 5mm, the spacing between adjacent flat tube groups 30 is too small, making the flat tubes prone to deformation when connected to the first manifold 10 or the second manifold 20, affecting assembly and posing a higher risk of leakage.

[0050] Optionally, the spacing B between adjacent flat tube groups 30 can be 5mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm or 100mm, etc., which will not be listed here.

[0051] Furthermore, in one embodiment, the number of flat tube groups 30 is defined as N, the width of the inlet pipe 31 or outlet pipe 32 is defined as W, and the total number of inlet pipes 31 and outlet pipes 32 is defined as L. Wherein, B = [175 × NW × LA × (L-1) × N] / (N-1). In this way, the spacing between adjacent flat tube groups 30 is set more reasonably, which can further improve the structural strength of the liquid cooling plate 100 while reducing costs.

[0052] In one embodiment, such as Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the first manifold 10 includes a first branch pipe 11 and a second branch pipe 12. The first branch pipe 11 and the second branch pipe 12 are separately arranged and fixedly connected. The liquid inlet chamber 101 is located in the first branch pipe 11, and the liquid outlet chamber 102 is located in the second branch pipe 12. This facilitates the formation of the liquid inlet chamber 101 and the liquid outlet chamber 102.

[0053] Further, in one embodiment, the inlet chamber 101 and the outlet chamber 102 are distributed along a first preset direction. That is, in this embodiment, the first branch pipe 11 and the second branch pipe 12 are distributed along the first preset direction and fixedly connected. At this time, the first branch pipe 11 and the second branch pipe 12 are basically in the same plane as the flat pipe. Taking the inlet chamber 101 located on the side of the outlet chamber 102 near the flat pipe as an example, that is, in such a case... Figure 2 and Figure 3 In the structure shown, the inlet pipe 31 can be directly connected to the liquid inlet chamber 101, while the outlet pipe 32 can pass through the liquid inlet chamber 101 to connect with the liquid outlet chamber 102. Thus, both the inlet pipe 31 and the outlet pipe 32 can be designed as straight pipes, resulting in a simple structure that is easy to connect. Furthermore, it ensures that both the inlet pipe 31 and the outlet pipe 32 are on the same plane, facilitating contact and assembly with heat-generating components such as battery modules.

[0054] In another embodiment, the inlet chamber 101 and the outlet chamber 102 are distributed along a third preset direction, which forms an angle with the first and second preset directions. That is, in this embodiment, the first branch pipe 11 and the second branch pipe 12 are distributed along the third preset direction and fixedly connected. In this case, one of the first branch pipe 11 and the second branch pipe 12 will be on a different plane from the flat pipe. For example, defining the plane where the flat pipe is located as the reference plane, and taking the inlet chamber 101 located above the reference plane along the third preset direction, and the outlet chamber 102 located on the reference plane as an example, that is, in such a case... Figure 5 , Figure 6 , Figure 8 and Figure 9 In the structure shown, the outlet pipe 32 can be configured as a straight pipe and directly connected to the liquid outlet chamber 102, while the inlet pipe 31 can be connected to the liquid inlet chamber 101 through a bendable adapter pipe 33, etc. Here, the inlet pipe 31 and the adapter pipe 33 can be an integral or separate structure. In this way, it can also be ensured that the inlet pipe 31 and the outlet pipe 32 are on the same plane, which facilitates contact assembly with heat-generating elements such as battery modules.

[0055] Here, the first preset direction, the second preset direction, and the third preset direction can be set perpendicular to each other in order to facilitate the processing of the liquid cooling plate 100.

[0056] Of course, in other embodiments, the first manifold 10 can also be as follows: Figure 8 and Figure 9 The diagram shows an integrated structure, with a first partition 13 inside the first manifold 10. The first partition 13 divides the internal cavity of the first manifold 10 into an inlet chamber 101 and an outlet chamber 102. At this time, the inlet chamber 101 and the outlet chamber 102 can also be distributed along a first preset direction or a third preset direction.

[0057] In one embodiment, such as Figure 2 and Figure 5 As shown, the second manifold 20 includes a third branch pipe 21 and a fourth branch pipe 22. A first flow cavity 201 is disposed within the third branch pipe 21, and a second flow cavity 202 is disposed within the fourth branch pipe 22. The third branch pipe 21 and the fourth branch pipe 22 are separately disposed but fixedly connected. This facilitates the formation of the first flow cavity 201 and the second flow cavity 202.

[0058] Furthermore, such as Figure 2As shown, the first flow cavity 201 and the second flow cavity 202 are distributed along a first preset direction. That is, in this embodiment, the third branch pipe 21 and the fourth branch pipe 22 are distributed along the first preset direction and fixedly connected. At this time, the third branch pipe 21 and the fourth branch pipe 22 are basically in the same plane as the flat pipe. In this way, similar to the structure of the first manifold 10, it can be ensured that the inlet pipe 31 and the outlet pipe 32 extend in a straight line near the end of the second manifold 20, thereby facilitating the processing of the inlet pipe 31 and the outlet pipe 32.

[0059] like Figure 5 As shown, the first flow cavity 201 and the second flow cavity 202 are distributed along a third preset direction. That is, in this embodiment, the first branch pipe 11 and the second branch pipe 12 are distributed along the third preset direction and fixedly connected. Similarly, a bendable adapter pipe 33 can be used to connect with the flow cavity located above the reference plane to ensure that the multiple flat pipes serving as the inlet pipe 31 or the outlet pipe 32 are all located in the same plane.

[0060] In addition, the first flow cavity 201 and the second flow cavity 202 can also be distributed along the second preset direction. That is, in this embodiment, the first branch pipe 11 and the second branch pipe 12 are distributed and fixedly connected along the second preset direction, and the first flow channel group 301 is connected through the individual first branch pipe 11, and the second flow channel group 302 is connected through the individual second branch pipe 12.

[0061] Of course, in other embodiments, the second manifold 20 can also be as follows: Figure 7 and Figure 10 The structure shown is an integrated unit, and a second partition 23 is provided inside the second manifold 20. The second partition 23 divides the internal cavity of the second manifold 20 into a first flow cavity 201 and a second flow cavity 202. At this time, the first flow cavity 201 and the second flow cavity 202 can also be distributed along a first preset direction, a second preset direction, or a third preset direction.

[0062] For ease of explanation, the flow path of the first flow channel group 301 is indicated by solid arrows in the accompanying drawings, and the flow path of the second flow channel group 302 is indicated by dashed arrows. The first flow channel group 301 has one or more inlet flow channels 3101, and the number of outlet flow channels 3201 in the first flow channel group 301 corresponds one-to-one with the number of inlet flow channels 3101. Similarly, the second flow channel group 302 has one or more inlet flow channels 3101, and the number of outlet flow channels 3201 in the second flow channel group 302 corresponds one-to-one with the number of inlet flow channels 3101.

[0063] Example 1

[0064] In this embodiment, as Figure 1 and Figure 4As shown, the number of inlet channels 3101 and outlet channels 3201 in the second channel group 302 corresponds one-to-one with the number of inlet channels 3101 and outlet channels 3201 in the first channel group 301. Furthermore, each inlet channel 3101 in either the first channel group 301 or the second channel group 302 is positioned along a second preset direction close to at least one outlet channel 3201 of the other, and at least some of the inlet channels 3101 and outlet channels 3201 are alternately arranged. This improves the uniformity of heat exchange during liquid cooling plate 100 and reduces temperature differences.

[0065] Specifically, in this embodiment, the first flow channel group 301 includes two inlet flow channels 3101 and two outlet flow channels 3201, and the second flow channel group 302 includes two inlet flow channels 3101 and two outlet flow channels 3201. That is, each flow channel group includes two inlet pipes 31 and two outlet pipes 32, and the two inlet flow channels 3101 in the first flow channel group 301 are defined as P1 and the two outlet flow channels 3201 are defined as Q1. At the same time, the two inlet flow channels 3101 in the second flow channel group 302 are defined as P2 and the two outlet flow channels 3201 are defined as Q2. The arrangement of the inlet flow channels 3101 and the outlet flow channels 3201 along the second direction is as follows: Figure 1 As shown, the sequence is P1, Q2, P1, Q2, Q1, P2, Q1, and P2. Alternatively, it can be set as follows: Figure 4 As shown, they are arranged in the order of Q1, P2, Q1, P2, P1, Q2, P1 and Q2.

[0066] Example 2

[0067] In this embodiment, as Figure 7 As shown, the first flow channel group 301 and the second flow channel group 302 are arranged at intervals along a second preset direction. The first flow channel group 301 includes an inlet flow channel 3101 and an outlet flow channel 3201, and the second flow channel group 302 includes an inlet flow channel 3101 and an outlet flow channel 3201. The inlet flow channel 3101 of one of the first flow channel group 301 and the second flow channel group 302 is positioned close to the outlet flow channel 3201 of the other along the second preset direction. This reduces the flow length of the refrigerant and improves the heat exchange effect of the liquid cooling plate 100.

[0068] Specifically, the inlet channel 3101 in the first channel group 301 is defined as P1, and the outlet channel 3201 is defined as Q1. The inlet channel 3101 in the second channel group 302 is defined as P2, and the outlet channel 3201 is defined as Q2. Among them, Q1, P1, Q2 and P2 are arranged sequentially along the second preset direction.

[0069] Example 3

[0070] In this embodiment, as Figure 10 As shown, the first flow channel group 301 and the second flow channel group 302 are arranged at intervals along a second preset direction. The first flow channel group 301 includes two inlet flow channels 3101 and two outlet flow channels 3201, with the inlet flow channels 3101 and outlet flow channels 3201 alternating sequentially along the second preset direction. The second flow channel group 302 also includes two inlet flow channels 3101 and two outlet flow channels 3201, with the inlet flow channels 3101 and outlet flow channels 3201 alternating sequentially along the second preset direction. In this arrangement, the inlet flow channel 3101 of one flow channel group 301 and the outlet flow channel group 302 are positioned closer to the outlet flow channel 3201 of the other flow channel group 302 along the second preset direction. This arrangement effectively balances the temperature difference.

[0071] Specifically, in the first flow channel group 301, both inlet flow channels 3101 are defined as P1, and both outlet flow channels 3201 are defined as Q1. Similarly, in the second flow channel group 302, both inlet flow channels 3101 are defined as P2, and both outlet flow channels 3201 are defined as Q2. Along the second preset direction, Q1, P1, Q1, P1, Q2, P2, Q2, and P2 are sequentially arranged.

[0072] However, this is not the only possibility. The inlet channel 3101 and outlet channel 3201 in the second channel group 302 may not be the same as those in the first channel group 301. They can be set reasonably according to actual needs.

[0073] This application also provides a battery pack, which includes a battery module and a liquid cooling plate 100 of any of the above embodiments, with the battery module mounted on the liquid cooling plate 100.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A liquid-cooled plate, characterized in that, The system includes a heat exchange channel, which comprises an inlet chamber (101), an outlet chamber (102), a first flow chamber (201), a second flow chamber (202), a first flow channel group (301), and a second flow channel group (302). The inlet chamber (101) and the outlet chamber (102) are located on one side of the first flow channel group (301) and the second flow channel group (302) along a first preset direction. The first flow chamber (201) and the second flow chamber (202) are located on the other side of the first flow channel group (301) and the second flow channel group (302) along the first preset direction. The first flow chamber (201) and the second flow chamber (202) are not connected. The first flow channel group (301) and the second flow channel group (302) each include at least one inlet flow channel (3101) and at least one outlet flow channel (3201). In the first flow channel group (301), one end of the inlet flow channel (3101) is connected to the liquid inlet chamber (101), and the other end is connected in series with the liquid outlet chamber (102) through the first flow chamber (201) and the corresponding outlet flow channel (3201). In the second flow channel group (302), one end of the inlet flow channel (3101) is connected to the liquid inlet chamber (101), and the other end is connected in series with the liquid outlet chamber (102) through the second flow chamber (202) and the corresponding outlet flow channel (3201). The refrigerant flows in opposite directions in the inlet channel (3101) and the outlet channel (3201), and at least one of the inlet channels (3101) of the first channel group (301) and the second channel group (302) is arranged close to the outlet channel (3201) of the other along a second preset direction, with the first preset direction and the second preset direction forming an angle.

2. The liquid cooling plate according to claim 1, characterized in that, The liquid inlet chamber (101) and the liquid outlet chamber (102) are distributed along the first preset direction; Alternatively, the inlet chamber (101) and the outlet chamber (102) are distributed along a third preset direction, which is set at an angle to the first preset direction and the second preset direction.

3. The liquid cooling plate according to claim 2, characterized in that, The liquid cooling plate includes a first manifold (10), the first manifold (10) includes a first branch pipe (11) and a second branch pipe (12), the liquid inlet chamber (101) is located in the first branch pipe (11), and the liquid outlet chamber (102) is located in the second branch pipe (12). The first branch pipe (11) and the second branch pipe (12) are separately set and fixedly connected.

4. The liquid cooling plate according to claim 2, characterized in that, The liquid cooling plate includes a first manifold (10), and a first partition (13) is provided inside the first manifold (10). The first partition (13) divides the internal cavity of the first manifold (10) into the liquid inlet cavity (101) and the liquid outlet cavity (102).

5. The liquid cooling plate according to claim 1, characterized in that, The first flow cavity (201) and the second flow cavity (202) are distributed along the first preset direction, or the first flow cavity (201) and the second flow cavity (202) are distributed along the second preset direction, or the first flow cavity (201) and the second flow cavity (202) are distributed along the third preset direction, wherein the third preset direction is set at an angle to the first preset direction and the second preset direction.

6. The liquid cooling plate according to claim 5, characterized in that, The liquid cooling plate also includes a second manifold (20), which includes a third branch pipe (21) and a fourth branch pipe (22). A first flow chamber (201) is located in the third branch pipe (21), and a second flow chamber (202) is located in the fourth branch pipe (22). The third branch pipe (21) and the fourth branch pipe (22) are separately installed and fixedly connected.

7. The liquid-cooled plate according to claim 5, characterized in that, The liquid cooling plate also includes a second manifold (20), and a second partition (23) is provided inside the second manifold (20). The second partition (23) divides the internal cavity of the second manifold (20) into the first flow cavity (201) and the second flow cavity (202).

8. The liquid-cooled plate according to any one of claims 1-7, characterized in that, The number of inlet channels (3101) in the first flow channel group (301) is one or more, and the number of outlet channels (3201) in the first flow channel group (301) is set in a one-to-one correspondence with the number of inlet channels (3101); The number of inlet channels (3101) and outlet channels (3201) in the second channel group (302) corresponds one-to-one with the number of inlet channels (3101) and outlet channels (3201) in the first channel group (301). Furthermore, each inlet channel (3101) of one of the first channel group (301) and the second channel group (302) is arranged along the second preset direction close to at least one outlet channel (3201) of the other, and at least some of the inlet channels (3101) and outlet channels (3201) are arranged alternately in sequence.

9. The liquid cooling plate according to claim 8, characterized in that, The first flow channel group (301) includes two inlet flow channels (3101) and two outlet flow channels (3201), and the two inlet flow channels (3101) in the first flow channel group (301) are both defined as P1, and the two outlet flow channels (3201) are both defined as Q1; The second flow channel group (302) includes two inlet flow channels (3101) and two outlet flow channels (3201), and the two inlet flow channels (3101) in the second flow channel group (302) are both defined as P2, and the two outlet flow channels (3201) are both defined as Q2; Wherein, along the second preset direction, P1, Q2, P1, Q2, Q1, P2, Q1 and P2 are set in sequence, or Q1, P2, Q1, P2, P1, Q2, P1 and Q2 are set in sequence.

10. The liquid-cooled plate according to any one of claims 1-7, characterized in that, The number of inlet channels (3101) in the first flow channel group (301) is one or more, and the number of outlet channels (3201) in the first flow channel group (301) corresponds one-to-one with the number of inlet channels (3101). The inlet channels (3101) and outlet channels (3201) in the first flow channel group (301) are alternately arranged in sequence along the second preset direction. The number of inlet channels (3101) in the second flow channel group (302) is one or more, and the number of outlet channels (3201) in the second flow channel group (302) corresponds one-to-one with the number of inlet channels (3101). The inlet channels (3101) and outlet channels (3201) in the second flow channel group (302) are alternately arranged along the second preset direction. In this configuration, the inlet channel (3101) of one of the first flow channel group (301) and the second flow channel group (302) is arranged along the second preset direction close to the outlet channel (3201) of the other.

11. The liquid cooling plate according to claim 10, characterized in that, The first flow channel group (301) and the second flow channel group (302) are arranged at intervals along the second preset direction.

12. The liquid cooling plate according to claim 11, characterized in that, The first flow channel group (301) includes an inlet flow channel (3101) and an outlet flow channel (3201), and the inlet flow channel (3101) in the first flow channel group (301) is defined as P1, and the outlet flow channel (3201) is defined as Q1; the second flow channel group (302) includes an inlet flow channel (3101) and an outlet flow channel (3201), and the inlet flow channel (3101) in the second flow channel group (302) is defined as P2, and the outlet flow channel (3201) is defined as Q2; wherein, along the second preset direction, Q1, P1, Q2 and P2 are arranged sequentially; Alternatively, the first flow channel group (301) includes two inlet flow channels (3101) and two outlet flow channels (3201), and both inlet flow channels (3101) in the first flow channel group (301) are defined as P1, and both outlet flow channels (3201) are defined as Q1; the second flow channel group (302) includes two inlet flow channels (3101) and two outlet flow channels (3201), and both inlet flow channels (3101) in the second flow channel group (302) are defined as P2, and both outlet flow channels (3201) are defined as Q2; wherein, along the second preset direction, Q1, P1, Q1, P1, Q2, P2, Q2 and P2 are arranged sequentially.

13. The liquid cooling plate according to claim 1, characterized in that, The liquid cooling plate includes at least two flat tube groups (30), and the at least two flat tube groups (30) are distributed at intervals along the second preset direction; Each of the flat tube groups (30) includes at least one inlet pipe (31) and at least one outlet pipe (32), wherein the inlet flow channel (3101) is located in the inlet pipe (31) and the outlet flow channel (3201) is located in the outlet pipe (32); The distance between adjacent inlet pipe (31) and outlet pipe (32) in the flat pipe group (30) is A, and 5mm≤A≤40mm; And / or, the distance between adjacent flat tube groups (30) is B, and 5mm≤B≤100mm.

14. The liquid cooling plate according to claim 13, characterized in that, The number of the flat tube group (30) is defined as N, the width of the inlet tube (31) or the outlet tube (32) is defined as W, and the total number of the inlet tube (31) and the outlet tube (32) is defined as L; Where, B = [175 × NW × LA × (L-1) × N] / (N-1).

15. A battery pack, characterized in that, It includes a battery module and a liquid cooling plate as described in any one of claims 1-14, wherein the battery module is mounted on the liquid cooling plate.

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