Liquid cooling plate assembly and battery pack

Abstract

The utility model belongs to the technical field of liquid cooling plates, and particularly relates to a liquid cooling plate assembly and a battery pack, the liquid cooling plate assembly comprises a liquid cooling plate body and a frame, the liquid cooling plate body is internally provided with more than two flow channels, the frame is arranged along the edge of the liquid cooling plate body, and the flow channels are communicated with the liquid cooling plate body. An accommodating space for arranging a module to be cooled is formed in a region between the frames on the liquid cooling plate body, a liquid inlet channel and a liquid return channel are arranged in the frames, the liquid inlet channel is simultaneously communicated with inlet ends of the more than two flow channels, and the liquid return channel is simultaneously communicated with outlet ends of the more than two flow channels. Under the condition that the total flow of the cooling liquid in the liquid cooling plate body is not changed, the flow path of the cooling liquid in a single flow channel is short, the temperature rise is small, the heat exchange amount is larger, the cooling effect is better, the overall structural strength of the cold plate assembly is higher, the bearing and supporting capacities of the cold plate assembly are better, and the use reliability of the cold plate assembly in an application scene with bearing and supporting requirements is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid cooling plates, and in particular relates to a liquid cooling plate assembly and a battery pack. Background Art

[0002] With the continuous development of new energy vehicles, energy storage and other fields, liquid cooling plates, as their core components, must not only ensure that the heat dissipation performance meets the requirements, but also the structural performance needs to meet the requirements. At present, liquid cooling plates often adopt a one-in-one-out series flow channel design. The flow path of the coolant in the liquid cooling plate is long. The closer to the outlet position, the higher the coolant temperature, which leads to a significant reduction in its cooling performance and poor temperature uniformity of the battery pack. In some application scenarios, the liquid cooling plate only plays a cooling role and does not require a large load-bearing strength. For example, in conventional new energy vehicles, the liquid cooling plate is arranged at the bottom of the battery pack and does not bear the gravity of the battery. The gravity of the battery is loaded on the battery pack box. However, in some application scenarios, the liquid cooling plate not only plays a cooling role but also plays a certain load-bearing role. For example, in the energy storage system, the battery packs are stacked and the liquid cooling plate needs to bear a certain weight. At present, the liquid cooling plate is generally formed by extrusion or stamping of aluminum, and the structural strength is limited. It is difficult to meet its load-bearing and support requirements in such application scenarios. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a liquid cooling plate assembly and a battery pack with better temperature uniformity and cooling effect and higher structural strength.

[0004] The utility model provides a liquid cooling plate assembly, including a liquid cooling plate body and a frame, wherein a flow channel is arranged in the liquid cooling plate body, and the flow channels have more than two. The frame is arranged along the edge of the liquid cooling plate body, and the area between the frames on the liquid cooling plate body forms a storage space for arranging a module to be cooled. A liquid inlet channel and a liquid return channel are arranged inside the frame, and the liquid inlet channel is connected to the inlet ends of the more than two flow channels at the same time, and the liquid return channel is connected to the outlet ends of the more than two flow channels at the same time.

[0005] Furthermore, the liquid inlet channel and the liquid return channel are located on the same side of the frame.

[0006] Furthermore, the frame includes two longitudinal beams and a water inlet and outlet module. The two longitudinal beams are hollow and are located on two opposite sides of the liquid cooling plate body. The water inlet and outlet modules are located on the other side of the liquid cooling plate body. The liquid inlet channel and the liquid return channel are arranged on the water inlet and outlet modules.

[0007] Furthermore, a plurality of pulleys are arranged on the frame.

[0008] Furthermore, the two longitudinal beams are provided with openings, and the plurality of pulleys are correspondingly arranged inside the two longitudinal beams, and the wheel surfaces of the pulleys extend out along the openings.

[0009] Furthermore, it also includes hanging holes, which are arranged on the two longitudinal beams.

[0010] Furthermore, a nut is provided on the top of the frame to fix the upper cover of the battery pack.

[0011] Furthermore, it also includes a bracket, which is arranged on the liquid cooling plate body and located between the frames, and is used to fix the module to be cooled.

[0012] Furthermore, a space-avoiding structure is provided on the bracket.

[0013] The present invention also provides a battery pack, including a battery module, an upper cover and the liquid cooling plate assembly as described above, wherein the battery module is arranged on the liquid cooling plate body, and the upper cover covers the outside of the battery module and is fixed to the frame.

[0014] The beneficial effect of the utility model is that, when the total flow rate of the coolant in the liquid cooling plate body remains unchanged, the flow distance of the coolant in a single flow channel is short, the temperature rise is small, the temperature uniformity of the liquid cooling plate body is better, and there can be a larger temperature difference between the liquid cooling plate body and the module to be cooled, the heat exchange capacity is larger, and the cooling effect is better. The frame can not only increase the structural strength of the liquid cooling plate body, improve the overall structural strength of the liquid cooling plate assembly, and improve its load-bearing and support capabilities, so that it has higher reliability in application scenarios with load-bearing and support requirements, but also the frame can play a lateral limiting role on the module to be cooled, which is convenient for installation and fixation. At the same time, it is used to set the aforementioned liquid inlet channel and liquid return channel, which reduces the setting of additional components on the basis of increasing the structural strength, which is conducive to the control of the overall weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the liquid cooling plate assembly of the utility model.

[0016] Figure 2 It is a schematic diagram of the coordination between the flow channel on the liquid cooling plate body and the water inlet and outlet modules of the utility model.

[0017] Figure 3 It is a schematic diagram of the flow direction of the coolant on the water inlet and outlet modules and the liquid cooling plate body of the utility model.

[0018] Figure 4 This is a schematic diagram of the cooperation between the coolant longitudinal beam and the pulley of the utility model.

[0019] Figure 5 It is a schematic diagram of the exploded structure of the battery pack of the present utility model.

[0020] In the figure: 1. Liquid cooling plate body; 11. Flow channel; 2. Longitudinal beam; 21. Lifting hole; 3. Water inlet and outlet module; 31. Joint; 4. Nut; 5. Pulley; 6. Crossbeam; 7. Mounting frame; 8. Air avoidance structure; 100. Liquid cooling plate assembly; 200. Battery module. DETAILED DESCRIPTION

[0021] like Figure 1-Figure 4 As shown, the utility model provides a liquid cooling plate assembly 100, which includes a liquid cooling plate body 1 and a frame. A flow channel 11 is arranged inside the liquid cooling plate body 1 for the coolant to flow, and the flow channels 11 have more than two. The frame is arranged along the edge of the liquid cooling plate body 1, that is, the frame is arranged on the side of the liquid cooling plate body 1, and the top of the frame is higher than the surface of the liquid cooling plate body 1. The area between the frames on the liquid cooling plate body 1 forms a receiving space for arranging the module to be cooled. A liquid inlet channel and a liquid return channel are arranged inside the frame. The liquid inlet channel is connected to the inlet ends of more than two flow channels 11 at the same time, and the liquid return channel is connected to the outlet ends of more than two flow channels 11 at the same time, so that more than two flow channels 11 are arranged in parallel.

[0022] The liquid cooling plate assembly 100 provided by the utility model is provided with more than two flow channels 11, and the liquid inlet channel and the liquid return channel are connected in parallel. When the total flow rate of the coolant in the liquid cooling plate body 1 remains unchanged, the flow distance of the coolant in a single flow channel 11 is short, the temperature rise is small, the temperature uniformity of the liquid cooling plate body 1 is better, and there can be a greater temperature difference between the liquid cooling plate body 1 and the module to be cooled, the heat exchange capacity is larger, and the cooling effect is better. The frame can not only increase the structural strength of the liquid cooling plate body 1, but also improve the overall structural strength of the liquid cooling plate assembly 100, improve its load-bearing and support capabilities, and make it more reliable in use in application scenarios with load-bearing and support requirements, and the frame can be used to set the above-mentioned liquid inlet channel and liquid return channel, which reduces the setting of additional components on the basis of increasing the structural strength, which is conducive to the control of the overall weight. At the same time, the frame can also play a lateral limiting role on the module to be cooled, which is convenient for installation and fixation.

[0023] In the present invention, two joints 31 are provided on the frame, one of which is connected to the liquid inlet channel, and the other is connected to the liquid return channel, and the two joints 31 are used to connect to an external coolant pipeline or a coolant circulation mechanism. The liquid inlet channel and the liquid return channel can be located on different sides of the frame, and the two joints 31 are correspondingly located on different sides of the frame. In the present invention, it is preferred that the liquid inlet channel and the liquid return channel are located on the same side of the frame, and the two joints 31 are located on the same side of the frame, which is more convenient for connection with an external coolant pipeline or a coolant circulation mechanism.

[0024] The frame specifically includes two longitudinal beams 2 and a water inlet and outlet module 3. The two longitudinal beams 2 are hollow and are correspondingly located on two opposite sides of the liquid cooling plate body 1. The water inlet and outlet module 3 is located on the other side of the liquid cooling plate body 1. The liquid inlet channel, liquid return channel and two joints 31 are all arranged on the water inlet and outlet module 3. In this arrangement, the water inlet and outlet module 3 is used to arrange the liquid inlet channel, liquid return channel and two joints 31. The two hollow longitudinal beams 2 increase the structural strength of the liquid cooling plate body 1 and reduce the overall weight.

[0025] The shape of the flow channel 11 can be a serpentine shape or other shapes, and the two longitudinal beams 2 and the liquid cooling plate body 1 can be fixed by welding later, or integrally formed by aluminum extrusion. Figure 3 As described, the coolant flows out along the dotted arrow after entering the two or more flow channels 11 along the solid arrow. The connection between the liquid inlet channel and the liquid return channel and the flow channel 11 can be that when the water outlet module 3 is arranged on the liquid cooling plate body 1, the liquid inlet channel is aligned with the inlet ends of the two or more flow channels 11 and is connected, and the liquid return channel is aligned with the outlet ends of the two or more flow channels 11 and is connected. Or, a confluence area 1 is arranged at the inlet ends of the two flow channels 11 on the liquid cooling plate body 1, and the inlet ends of the two or more flow channels 11 are all connected to the confluence area 1, and a confluence area 2 is arranged at the outlet ends of the two flow channels 11 on the liquid cooling plate body 1, and the outlet ends of the two or more flow channels 11 are all connected to the confluence area 2, and when the water inlet and outlet module 3 is arranged on the liquid cooling plate body 1, the liquid inlet channel is aligned with the confluence area 1 and is connected, and the liquid return channel is aligned with the confluence area 2 and is connected. The side of the liquid cooling plate body 1 opposite to the water inlet and outlet module 3 is closed.

[0026] The frame is also provided with a plurality of pulleys 5 to facilitate the movement of the liquid cooling plate assembly 100. For example, when the battery pack is moved into or out of the cluster rack, the pulleys 5 can be used to slide on the cluster rack to reduce the difficulty of movement.

[0027] The two longitudinal beams 2 are provided with openings, such as Figure 4 As shown, a plurality of pulleys 5 are correspondingly rotatably arranged inside the two longitudinal beams 2, and the wheel surface of the pulley 5 extends along the opening to contact with the cluster frame or other external structure to achieve sliding. In this arrangement, the pulley 5 is installed in the hollow area of ​​the longitudinal beam 2, which is conducive to reducing the overall volume of the liquid cooling plate assembly 100 to reduce space occupation.

[0028] The utility model also includes a hoisting hole 21, which is convenient for connecting the hoisting mechanism with the battery pack, thereby facilitating the hoisting and movement of the battery pack. Preferably, the hoisting hole 21 is set on the two longitudinal beams 2 to avoid the hoisting hole 21 interfering with the liquid inlet channel and the liquid return channel. It is further preferred that the hoisting hole 21 is set on the side of the longitudinal beam 2 to avoid the hoisting hole 21 interfering with the connection between the battery pack cover and the top of the longitudinal beam 2.

[0029] A nut 4 is provided on the top of the frame to fix the upper cover of the battery pack. Specifically, when the upper cover of the battery pack is set, a bolt passes through the edge of the upper cover and is connected to the nut 4, thereby fixing the upper cover.

[0030] The utility model also includes a bracket, which is arranged on the liquid cooling plate body 1 and located between the frames, and is used to fix the module to be cooled. When the module to be cooled is a battery module 200, the bracket includes a crossbeam 6 and a mounting frame 7. The crossbeam 6 can be arranged on the liquid cooling plate body 1 by welding or other means, and the two ends of the crossbeam 2 can be respectively connected to the two longitudinal beams 2, which increases the structural strength of the liquid cooling plate body 1 and facilitates the connection of fasteners such as bolts, thereby facilitating the installation and fixing of the battery module 200 on the liquid cooling plate body 1. The mounting frame 7 can be arranged on the liquid cooling plate body 1 by welding or other means, and the two ends of the crossbeam 2 can be respectively connected to the two longitudinal beams 2, which increases the structural strength of the liquid cooling plate body 1 and facilitates the connection of fasteners such as bolts, thereby facilitating the fixing of the battery module 200 and the battery pack front panel bracket, fuse bracket and other structures on the liquid cooling plate body 1.

[0031] The bracket is provided with a space-avoiding structure 8, that is, the cross beam 6 and the mounting frame 7 are provided with a space-avoiding structure 8, such as Figure 1 As shown, the air avoidance structure 8 is specifically the area where the side surfaces of the cross beam 6 and the mounting frame 7 are concave. On the basis of utilizing the cross beam 6 and the mounting frame 7 to achieve the fixing requirements, the setting of the air avoidance structure 8 can, on the one hand, avoid the setting of other structural parts, and on the other hand, can also play a role in weight reduction.

[0032] like Figure 5 As shown, the utility model also provides a battery pack, which includes a battery module 200, an upper cover and the liquid cooling plate assembly 100 as described above. The aforementioned module to be cooled is a battery module 200, and the battery module 200 is arranged on the liquid cooling plate body 1. The upper cover covers the outside of the battery module 200 and is connected to the nut 4 on the frame by bolts for fixing. The heat generated by the battery module 200 can be directly taken away by the liquid cooling plate body 1, and the battery module 200 can be directly maintained after the upper cover is removed. Since the liquid cooling plate assembly 100 in the battery pack is provided with more than two flow channels 11 in parallel, the flow distance of the coolant in a single flow channel 11 is short, the temperature rise is small, the temperature uniformity of the liquid cooling plate body 1 is better, and there can be a greater temperature difference between the battery module 200, the heat exchange is greater, and the cooling effect is better. And based on the setting of the frame, it is not only easy to install the upper cover, but also increases the structural strength of the liquid cooling plate assembly 100, and the reliability of use is higher.

[0033] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0034] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A liquid cooling plate assembly, Its characteristics are: The invention comprises a liquid cooling plate body (1) and a frame, wherein a flow channel (11) is arranged in the liquid cooling plate body (1), wherein the flow channels (11) have more than two, wherein the frame is arranged along the edge of the liquid cooling plate body (1), wherein an area between the frames on the liquid cooling plate body (1) forms a receiving space for arranging a module to be cooled, wherein a liquid inlet channel and a liquid return channel are arranged inside the frame, wherein the liquid inlet channel is simultaneously connected to the inlet ends of the more than two flow channels (11), and the liquid return channel is simultaneously connected to the outlet ends of the more than two flow channels (11).

2. The liquid cooling plate assembly according to claim 1, Its characteristics are: The liquid inlet channel and the liquid return channel are located on the same side of the frame.

3. The liquid cooling plate assembly according to claim 2, Its characteristics are: The frame comprises two longitudinal beams (2) and a water inlet and outlet module (3); the two longitudinal beams (2) are hollow and are correspondingly located on two opposite sides of the liquid cooling plate body (1); the water inlet and outlet module (3) is located on the other side of the liquid cooling plate body (1); and the liquid inlet channel and liquid return channel are arranged on the water inlet and outlet module (3).

4. The liquid cooling plate assembly according to claim 3, Its characteristics are: A plurality of pulleys (5) are also provided on the frame.

5. The liquid cooling plate assembly according to claim 4, Its characteristics are: The two longitudinal beams (2) are provided with openings, and a plurality of pulleys (5) are correspondingly arranged inside the two longitudinal beams (2), with the wheel surfaces of the pulleys (5) extending out along the openings.

6. The liquid cooling plate assembly according to any one of claims 3 to 5, Its characteristics are: It also includes hanging holes (21), wherein the hanging holes (21) are arranged on the two longitudinal beams (2).

7. The liquid cooling plate assembly according to any one of claims 1 to 5, Its characteristics are: A nut (4) is provided on the top of the frame for fixing the upper cover of the battery pack.

8. The liquid cooling plate assembly according to any one of claims 1 to 5, Its characteristics are: It also comprises a bracket, which is arranged on the liquid cooling plate body (1) and located between the frames, and is used to fix the module to be cooled.

9. The liquid cooling plate assembly according to claim 8, Its characteristics are: The bracket is provided with a space-avoiding structure (8).

10. A battery pack, Its characteristics are: The liquid cooling plate assembly (100) comprises a battery module (200), an upper cover and the liquid cooling plate assembly (100) according to any one of claims 1 to 9, wherein the battery module (200) is arranged on a liquid cooling plate body (1), and the upper cover covers the outside of the battery module (200) and is fixed to a frame.

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