Liquid cooling plate with vein bionic flow channel and battery assembly

Abstract

The liquid cooling plate comprises a liquid cooling plate main body, the upper surface and the lower surface of the liquid cooling plate main body are respectively provided with a first cooling flow channel and a second cooling flow channel, and the liquid cooling plate main body is provided with a through hole communicated with the first cooling flow channel and the second cooling flow channel. The first cooling flow channel comprises a first main flow channel in the length direction of the liquid cooling plate main body and a plurality of first branch flow channels distributed in a vein shape, one end of each first branch flow channel communicates with the first main flow channel, and the other end of each first branch flow channel communicates with the through hole; each second cooling flow channel comprises a second main flow channel arranged in the length direction of the liquid cooling plate main body and second branch flow channels distributed in a vein shape, one end of each second branch flow channel communicates with the second main flow channel, the other end of each second branch flow channel communicates with the through hole, and the multiple second branch flow channels are different in width and are distributed in the length direction of the liquid cooling plate main body; and the width of the second branch flow channel is gradually increased from the two ends of the liquid cooling plate main body to the middle of the liquid cooling plate. According to the liquid cooling plate, cooling liquid can be distributed more uniformly.

Description

Technical Field

[0001] This utility model belongs to the technical field of battery cooling, specifically relating to a liquid cooling plate with a leaf vein biomimetic flow channel and a battery assembly including the liquid cooling plate. Background Technology

[0002] Liquid cooling plates are widely used in applications requiring high power density and thermal management due to their high-efficiency heat dissipation capabilities. They are commonly used for cooling batteries, and the market offers a variety of liquid cooling plates with different designs and structures to suit various application scenarios and technical requirements.

[0003] Traditional liquid cooling plates often require high pumping pressures to achieve sufficient cooling, resulting in high energy consumption. Single-layer flow channel designs typically struggle to ensure uniform cooling across the entire contact surface, leading to localized overheating and impacting equipment performance and lifespan. Uneven coolant distribution can occur as it flows through the cooling plate, especially in long or complexly shaped channels, easily causing insufficient cooling in certain areas. While traditional liquid cooling plates made of metal offer good thermal conductivity, their weight and cost are prohibitive for mobile devices or large-scale deployments. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the above-mentioned deficiencies in the prior art by providing a liquid cooling plate with a leaf vein biomimetic flow channel and a battery assembly including the liquid cooling plate. The structure of the liquid cooling plate enables the coolant to be distributed more evenly on the upper surface of the liquid cooling plate body, thereby improving heat dissipation performance and reducing the temperature difference between individual batteries in the battery module.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A liquid cooling plate with leaf vein-inspired flow channels includes a liquid cooling plate body. The upper surface of the liquid cooling plate body is provided with a first cooling flow channel, and the lower surface is provided with a second cooling flow channel. The liquid cooling plate body is also provided with a plurality of through holes for connecting the first cooling flow channel and the second cooling flow channel. The first cooling flow channel includes a first main flow channel arranged along the length direction of the liquid cooling plate body and a plurality of first branch flow channels distributed in a leaf vein pattern. One end of each of the plurality of first branch flow channels is connected to the first main flow channel, and the other end is connected to the corresponding through hole. The second cooling flow channel includes a second main flow channel arranged along the length direction of the liquid cooling plate body and a plurality of second branch flow channels distributed in a leaf vein pattern. One end of each of the plurality of second branch flow channels is connected to the second main flow channel, and the other end is connected to the corresponding through hole. The width of the plurality of second branch flow channels is different, and along the length direction of the liquid cooling plate body, the width of the second branch flow channels gradually increases from both ends of the liquid cooling plate body toward the middle of the liquid cooling plate.

[0007] Preferably, one end of the first main channel is the coolant inlet, and one end of the second main channel is the coolant outlet.

[0008] Preferably, the coolant inlet and the coolant outlet are located at the same end.

[0009] Preferably, the widths of the multiple first branch channels are the same.

[0010] Preferably, multiple first branch channels are symmetrically distributed along the first main channel, and multiple second branch channels are symmetrically distributed along the second main channel.

[0011] Preferably, the liquid cooling plate further includes an outer box, which is a frame structure with an opening in the middle. The opening is adapted to the size and shape of the liquid cooling plate body, and the liquid cooling plate body is installed in the opening of the outer box.

[0012] Preferably, the liquid cooling plate further includes an inlet pipe and an outlet pipe, both of which are disposed on the same side wall of the outer casing, and the inlet pipe is connected to the coolant inlet, and the outlet pipe is connected to the coolant outlet.

[0013] Preferably, the liquid cooling plate further includes a heat transfer component, which includes an upper cover plate and a lower cover plate. The upper cover plate covers the upper surface of the liquid cooling plate body, and the lower cover plate covers the lower surface of the liquid cooling plate body.

[0014] Preferably, the liquid cooling plate body is made of a hydrophobic material.

[0015] This utility model also provides a battery assembly, including a battery module and the aforementioned liquid cooling plate with leaf vein biomimetic flow channels. The battery module includes a plurality of batteries arranged in parallel and is placed on the liquid cooling plate.

[0016] The liquid cooling plate with leaf vein-inspired flow channels in this invention has a first cooling flow channel and a second cooling flow channel in the shape of leaf veins respectively set on the upper and lower surfaces of the liquid cooling plate body, and they are interconnected. The first cooling channel includes a first main channel and multiple first branch channels arranged in a leaf vein pattern. The second cooling channel includes a second main channel and multiple second branch channels arranged in a leaf vein pattern. The widths of the multiple second branch channels are different, and they exhibit a pattern where the width of the second branch channels gradually increases from both ends of the liquid cooling plate body towards the middle of the liquid cooling plate body along the length direction of the liquid cooling plate body. The width structure design of the multiple second branch channels allows the flow resistance of the multiple first branch channels to be different (the smaller the width of the second branch channel, the greater the flow resistance of the first branch channel connected to it). This allows the coolant in the first branch channel near the coolant inlet to flow slowly. The coolant can flow along the first main channel in a direction away from the coolant inlet, and then flow into other first branch channels. This makes the coolant distribution on the upper surface of the liquid cooling plate body more uniform, thereby reducing the temperature difference between individual cells in the battery module and improving heat dissipation performance. Attached Figure Description

[0017] Figure 1 This is an exploded view of the liquid cooling plate with leaf vein biomimetic flow channel in Embodiment 1 of this utility model;

[0018] Figure 2 This is a schematic diagram of the upper surface of the liquid cooling plate body in Embodiment 1 of this utility model;

[0019] Figure 3 This is a schematic diagram of the lower surface of the liquid cooling plate body in Embodiment 1 of this utility model;

[0020] Figure 4 This is a schematic diagram of the overall structure of the liquid cooling plate with leaf vein biomimetic flow channel in Embodiment 2 of this utility model;

[0021] Figure 5 This is an exploded view of the liquid cooling plate with leaf vein biomimetic flow channel in Embodiment 2 of this utility model;

[0022] Figure 6 This is a schematic diagram of the upper surface structure of the liquid cooling plate body in Embodiment 2 of this utility model;

[0023] Figure 7 This is a schematic diagram of the lower surface structure of the liquid cooling plate body in Embodiment 2 of this utility model;

[0024] Figure 8 This is a schematic diagram of the overall structure of the liquid cooling plate with leaf vein biomimetic flow channel in Embodiment 3 of this utility model;

[0025] Figure 9This is an exploded view of the liquid cooling plate with leaf vein biomimetic flow channel in Embodiment 3 of this utility model;

[0026] Figure 10 This is a schematic diagram of the upper surface structure of the liquid cooling plate body in Embodiment 3 of this utility model;

[0027] Figure 11 This is a schematic diagram of the lower surface structure of the liquid cooling plate body in Embodiment 3 of this utility model;

[0028] Figure 12 This is a schematic diagram of the battery assembly in Embodiment 4 of this utility model.

[0029] In the diagram: 100-Liquid cooling plate, 110-Liquid cooling plate body, 111-First main flow channel, 112-First branch flow channel, 113-Second main flow channel, 114-Second branch flow channel, 115-Through hole, 116-Coolant inlet, 117-Coolant outlet, 120-Upper cover plate, 130-Lower cover plate, 140-Water inlet pipe, 150-Water outlet pipe, 160-Cover plate fastening screw, 170-Sealing strip, 180-Outer box, 200-Battery module. Detailed Implementation

[0030] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "above" and other indications of orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," "installation," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] This utility model provides a liquid cooling plate with leaf vein-inspired flow channels, including a liquid cooling plate body. The upper surface of the liquid cooling plate body is provided with a first cooling flow channel, and the lower surface is provided with a second cooling flow channel. The liquid cooling plate body is also provided with a plurality of through holes for connecting the first cooling flow channel and the second cooling flow channel. The first cooling flow channel includes a first main flow channel arranged along the length direction of the liquid cooling plate body and a plurality of first branch flow channels distributed in a leaf vein shape. One end of each of the plurality of first branch flow channels is connected to the first main flow channel, and the other end is connected to the corresponding through hole. The second cooling flow channel includes a second main flow channel arranged along the length direction of the liquid cooling plate body and a plurality of second branch flow channels distributed in a leaf vein shape. One end of each of the plurality of second branch flow channels is connected to the second main flow channel, and the other end is connected to the corresponding through hole. The width of the plurality of second branch flow channels is different. Along the length direction of the liquid cooling plate body, from both ends of the liquid cooling plate body toward the middle of the liquid cooling plate, the width of the second branch flow channel gradually increases.

[0035] This utility model also provides a battery assembly, including a battery module and the aforementioned liquid cooling plate with leaf vein biomimetic flow channels. The battery module includes a plurality of batteries arranged in parallel and is placed on the liquid cooling plate.

[0036] Example 1

[0037] like Figure 1-3 As shown, this embodiment discloses a liquid cooling plate 100 with a leaf vein-inspired flow channel, including a liquid cooling plate body 110. The upper surface of the liquid cooling plate body 110 is provided with a first cooling flow channel, and the lower surface is provided with a second cooling flow channel. The liquid cooling plate body 110 is also provided with a plurality of through holes 115 for connecting the first cooling flow channel and the second cooling flow channel. The first cooling flow channel includes a first main flow channel 111 arranged along the length direction of the liquid cooling plate body 110 and a plurality of first branch flow channels 112 distributed in a leaf vein pattern.

[0038] Specifically, the liquid cooling plate body 110 has a rectangular structure. The first main flow channel 111 is located at the middle of the width direction of the liquid cooling plate body 110 and is arranged along the length direction of the liquid cooling plate body 110. One end of each of the multiple first branch channels 112 is connected to the first main flow channel 111, and the other end is connected to its corresponding through hole 115. The multiple first branch channels 112 are all at a certain angle to the first main flow channel 111.

[0039] In this embodiment, the number of through holes 115 is the same as the number of first branch channels 112, and each first branch channel 112 is connected to each corresponding through hole 115. Figure 2 , 3 As shown, the through holes 115 are arranged in two rows, and the two rows of through holes 115 are respectively arranged on the two sides of the width direction of the liquid cooling plate body 110.

[0040] like Figure 3 As shown, the second cooling channel includes a second main channel 113 arranged along the length of the liquid cooling plate body 110 and a plurality of second branch channels 114 distributed in a vein-like pattern. The second main channel 113 is located at the middle position in the width direction of the liquid cooling plate body 110 and is arranged along the length direction of the liquid cooling plate body 110. One end of each of the plurality of second branch channels 114 is connected to the second main channel 113, and the other end is connected to its corresponding through hole 115. The plurality of second branch channels 114 are all at a certain angle to the second main channel 113.

[0041] It is worth noting that the positions of the first cooling channel and the second cooling channel on the main body of the cooling plate are staggered. That is, the position of the first cooling channel on the upper surface of the cooling plate and the position of the second cooling channel on the lower surface of the cooling plate do not coincide. This allows the second cooling channel to supplement the heat dissipation of the first cooling channel and fill the part that the first cooling channel fails to cool.

[0042] like Figure 3 As shown, the widths of the multiple second branch channels 114 are different. Along the length of the liquid cooling plate body 110, the width of the second branch channels 114 gradually increases from both ends of the liquid cooling plate body 110 toward the middle of the liquid cooling plate. Specifically, from the proximal end of the second main channel 113 (the end closer to the coolant outlet 117) toward the distal end of the second main channel 113 (the end farther from the coolant outlet 117), the widths of the second branch channels 114 on both sides first increase and then decrease. Furthermore, the width of the first second branch channel 114 near the proximal end of the second main channel 113 is smaller than the width of the first second branch channel 114 near the distal end of the second main channel 113, that is, the width of the second branch channel 114 near the coolant outlet 117 is smaller.

[0043] In this embodiment, the width of the first second branch channel 114 near the proximal end of the second main channel 113 is 1 mm, and the width of the first second branch channel 114 near the distal end of the second main channel 113 is 2.5 mm. It can be seen that the smaller the width of the second branch channel 114 near the proximal end of the second main channel 113, the greater the flow resistance of the coolant and the slower the flow velocity.

[0044] like Figure 2 , 3As shown, the coolant enters from the coolant inlet 116 of the first main channel 111 and flows along the proximal end (close to the coolant inlet 116) towards the distal end (away from the coolant inlet 116) of the first main channel 111. At the same time, the coolant flows sequentially into a plurality of first branch channels 112 at the proximal end, and then flows along the through hole 115 into the second branch channel 114, and finally converges into the second main channel 113. To ensure that the coolant can flow smoothly from the near end to the far end along the first main channel 111, the multiple second branch channels 114 located at the near end (on the side near the coolant outlet 117) are designed with a narrower shape, thereby increasing the flow resistance of the coolant in the lower second branch channels 114. This ensures that the coolant can flow along the wider and less resistant first main channel 111 to the far end of the first main channel 111, and then flow into the multiple first branch channels 112 located at the far end in sequence. This makes the coolant evenly distributed in the first cooling channel, thereby reducing the temperature difference between individual batteries in the battery module 200 and improving heat dissipation performance.

[0045] In addition, such as Figure 3 As shown, the width of the second branch channel 114 gradually increases from the far end of the lower surface of the liquid cooling plate body 110 toward the middle of the lower surface of the liquid cooling plate body 110. That is to say, the width of the second branch channel 114 at the far end of the second cooling channel is also set to be relatively narrow.

[0046] like Figure 2 As shown, in the first cooling channel, coolant flows into the first main channel 111 from the coolant inlet 116 and flows from the near end of the first main channel 111 to the far end of the first main channel 111. Due to the effect of fluid inertia, coolant will accumulate at the far end of the first main channel 111, resulting in a larger coolant inflow into the multiple first branch channels 112 located at the far end. Consequently, the flow velocity from the far first branch channel 112 to the far second branch channel 114 will be faster, resulting in uneven distribution of coolant on the upper surface of the liquid cooling plate body 110.

[0047] Therefore, by making the width of the second branch channel 114 at the far end of the lower surface of the liquid cooling plate body 110 narrower, the flow resistance of the first branch channel 112 at the far end of the upper surface of the liquid cooling plate body 110 can be effectively increased, and the flow velocity of the first branch channel 112 at the far end of the upper surface of the liquid cooling plate body 110 can be reduced, thereby making the coolant evenly distributed on the upper surface of the liquid cooling plate body 110.

[0048] In this embodiment, one end of the first main channel 111 is the coolant inlet 116, and one end of the second main channel 113 is the coolant outlet 117. The coolant inlet 116 and the coolant outlet 117 are located at the same end.

[0049] In this embodiment, the widths of the multiple first branch channels 112 are the same, mainly by making the widths of the multiple second branch channels 114 different, in order to balance the flow resistance of the multiple first branch channels 112 and make the head loss of each first branch channel as similar as possible. This ensures that the coolant is evenly distributed on the upper surface of the liquid cooling plate body 110.

[0050] like Figure 2 , 3 As shown, furthermore, multiple first branch channels 112 are symmetrically distributed along the first main channel 111, and multiple second branch channels 114 are symmetrically distributed along the second main channel 113. That is to say, both the first branch channels 112 and the second branch channels 114 are symmetrically distributed from left to right.

[0051] Optionally, multiple first branch channels 112 and multiple second branch channels 114 are parallel to each other, and the first main channel 111 and the second main channel are parallel to each other.

[0052] like Figure 1 As shown, specifically, the liquid cooling plate 100 also includes a heat transfer assembly, which includes an upper cover plate 120 and a lower cover plate 130. The upper cover plate 120 covers the upper surface of the liquid cooling plate body 110, with its upper part contacting the bottom of the battery module 200 and its lower part contacting the coolant in the first cooling channel. It is used to transfer heat from the battery to the coolant in the first cooling channel, and the heated coolant flows along the channel into the second cooling channel. The lower cover plate 130 covers the lower surface of the liquid cooling plate body 110, with its upper part contacting the coolant in the second cooling channel. The coolant in the second cooling channel transfers heat to the lower cover plate 130. The upper cover plate 120 and the lower cover plate 130 are made of copper or aluminum.

[0053] Optionally, the liquid cooling plate body is made of a hydrophobic material, specifically Teflon. Using this material reduces the resistance between the coolant and the channel wall (reducing viscosity) and lowers the overall flow channel friction loss. This material also has the advantages of low cost and light weight, reducing the weight of the liquid cooling plate and facilitating overall weight reduction. Furthermore, using plastic materials makes processing easier.

[0054] This liquid cooling plate has no size limitation and can be applied to battery modules of various sizes. Figure 1-3 The diagram shows its use as a base plate for large energy storage battery modules. It can also be used not only as a module base plate but also as a clamping plate between two batteries. The specific form of the flow channel can be modified according to the actual situation, but it is generally as described above.

[0055] In this embodiment, the liquid cooling plate with leaf vein-inspired flow channels has first and second cooling channels in the shape of leaf veins respectively provided on the upper and lower surfaces of the liquid cooling plate body 110, and they are interconnected. The first cooling channel includes a first main channel 111 and a plurality of first branch channels 112 distributed in a leaf vein shape. The second cooling channel includes a second main channel 113 and a plurality of second branch channels 114 distributed in a leaf vein shape. The widths of the plurality of second branch channels 114 are different, and they exhibit a pattern of gradually increasing width from both ends of the liquid cooling plate body 110 toward the middle of the liquid cooling plate along the length direction of the liquid cooling plate body 110. The width structure design of the plurality of second branch channels 114 can reduce the flow resistance of the plurality of first branch channels 112. The difference (the smaller the width of the second branch channel 114, the greater the flow resistance of the first branch channel 112 connected to it) causes the coolant in the first branch channel 112 near the coolant inlet 116 to flow slowly. The coolant can flow along the first main channel 111 in a direction away from the coolant inlet 116, and then flow into other first branch channels 112. This makes the coolant more evenly distributed on the upper surface of the liquid cooling plate body 110, thereby reducing the temperature difference between individual batteries in the battery module 200 and improving heat dissipation performance.

[0056] Example 2

[0057] like Figure 4-7 As shown, this embodiment discloses a specific structure of a liquid cooling plate 100 with a leaf vein biomimetic flow channel, including a liquid cooling plate body 110, an upper cover plate 120, a lower cover plate 130, a sealing strip 170, a cover plate fastening screw 160, a water inlet pipe 140, a water outlet pipe 150, and an outer box 180.

[0058] The liquid cooling plate body 110 in this embodiment adopts the same structure as the liquid cooling plate body 110 in Embodiment 1, including a first cooling channel on the upper surface and a second cooling channel on the lower surface, as well as a plurality of first branch channels 112 and a plurality of second branch channels 114 distributed in a leaf vein pattern. The first cooling channel, the second cooling channel, and the through hole are processed by milling or injection molding.

[0059] The outer box 180 is a frame structure with a central opening, the opening of which is adapted to the size and shape of the liquid cooling plate body 110. The liquid cooling plate body 110 is installed inside the opening of the outer box 180, and the through holes 115 are all provided on the liquid cooling plate body 110. The upper cover plate 120 is installed on the upper surface of the liquid cooling plate body 110, and the lower cover plate 130 is installed on the lower surface of the liquid cooling plate body 110. Specifically, a sealing strip 170 is provided between the lower surface of the upper cover plate 120 and the upper surface of the outer box 180, and the two are bonded together by the sealing strip 170. In addition, the two are also tightly connected by cover plate fastening screws 160. A sealing strip 170 is provided between the upper surface of the lower cover plate 130 and the lower surface of the outer box 180, and the two are bonded together by the sealing strip 170. In addition, the two are also tightly connected by cover plate fastening screws 160. The water inlet pipe 140 and the water outlet pipe 150 are respectively located on the same side wall of the outer box 180, and the water inlet pipe 140 is connected to the coolant inlet 116, and the water outlet pipe 150 is connected to the coolant outlet 117.

[0060] The liquid cooling plate body not only serves as the heat transfer component of the liquid cooling plate, but also as the load-bearing component (supporting the weight of the battery).

[0061] In this embodiment, the coolant flow path of the liquid cooling plate with leaf vein biomimetic flow channel is as follows: water inlet pipe 140, coolant inlet 116, first main flow channel 111, first branch flow channel 112, through hole 115, second branch flow channel 114, second main flow channel 113, coolant outlet 117, and water outlet pipe 150.

[0062] In this embodiment, the liquid cooling plate with leaf vein-inspired flow channels has first and second cooling channels in the shape of leaf veins respectively provided on the upper and lower surfaces of the liquid cooling plate body 110, and they are interconnected. The first cooling channel includes a first main channel 111 and a plurality of first branch channels 112 distributed in a leaf vein shape. The second cooling channel includes a second main channel 113 and a plurality of second branch channels 114 distributed in a leaf vein shape. The widths of the plurality of second branch channels 114 are different, and they exhibit a pattern of gradually increasing width from both ends of the liquid cooling plate body 110 toward the middle of the liquid cooling plate along the length direction of the liquid cooling plate body 110. The width structure design of the plurality of second branch channels 114 can reduce the flow resistance of the plurality of first branch channels 112. The difference (the smaller the width of the second branch channel 114, the greater the flow resistance of the first branch channel 112 connected to it) causes the coolant in the first branch channel 112 near the coolant inlet 116 to flow slowly. The coolant can flow along the first main channel 111 in a direction away from the coolant inlet 116, and then flow into other first branch channels 112. This makes the coolant more evenly distributed on the upper surface of the liquid cooling plate body 110, thereby reducing the temperature difference between individual batteries in the battery module 200 and improving heat dissipation performance.

[0063] Example 3

[0064] like Figure 8-11 As shown, this embodiment discloses another specific structure of a liquid cooling plate with a leaf vein biomimetic flow channel, including a liquid cooling plate body 110, an upper cover plate 120, a lower cover plate 130, a sealing strip 170, a cover plate fastening screw 160, a water inlet pipe 140, a water outlet pipe 150, and an outer box 180.

[0065] The liquid cooling plate body 110 in this embodiment adopts the same structure as the liquid cooling plate body 110 in Embodiment 1, including a first cooling channel on the upper surface and a second cooling channel on the lower surface, as well as a plurality of first branch channels 112 and a plurality of second branch channels 114 distributed in a leaf vein pattern. The first cooling channels, the second cooling channels, and the through holes are processed by milling or injection molding. Figure 9 , 10 As shown, the outer box 180 is a frame structure with an opening in the middle, and the opening is adapted to the size and shape of the liquid cooling plate body 110. The liquid cooling plate body 110 is installed in the opening of the outer box 180. The sides of the through hole 115 on the liquid cooling plate body 110 are all open structures. After the liquid cooling plate body 110 is installed in the opening of the outer box 180, the liquid cooling plate body 110 and the inner wall of the outer box 180 together form a closed through hole 115.

[0066] Furthermore, the upper cover plate 120 is installed on the upper surface of the liquid cooling plate body 110, and the lower cover plate 130 is installed on the lower surface of the liquid cooling plate body 110. Specifically, a sealing strip 170 is provided between the lower surface of the upper cover plate 120 and the upper surface of the outer box 180, and the two are bonded together by the sealing strip 170. In addition, the two are also tightly connected by cover plate fastening screws 160. A sealing strip 170 is provided between the upper surface of the lower cover plate 130 and the lower surface of the outer box 180, and the two are bonded together by the sealing strip 170. In addition, the two are also tightly connected by cover plate fastening screws 160. The water inlet pipe 140 and the water outlet pipe 150 are respectively provided on the same side wall of the outer box 180, and the water inlet pipe 140 is connected to the coolant inlet 116, and the water outlet pipe 150 is connected to the coolant outlet 117.

[0067] The liquid cooling plate body not only serves as the heat transfer component of the liquid cooling plate, but also as the load-bearing component (supporting the weight of the battery). In this embodiment, the coolant flow path of the liquid cooling plate with leaf vein bionic flow channels is as follows: water inlet pipe 140, coolant inlet 116, first main flow channel 111, first branch flow channel 112, through hole 115, second branch flow channel 114, second main flow channel 113, coolant outlet 117, and water outlet pipe 150.

[0068] In this embodiment, the liquid cooling plate with leaf vein-inspired flow channels has first and second cooling channels in the shape of leaf veins respectively provided on the upper and lower surfaces of the liquid cooling plate body 110, and they are interconnected. The first cooling channel includes a first main channel 111 and a plurality of first branch channels 112 distributed in a leaf vein shape. The second cooling channel includes a second main channel 113 and a plurality of second branch channels 114 distributed in a leaf vein shape. The widths of the plurality of second branch channels 114 are different, and they exhibit a pattern of gradually increasing width from both ends of the liquid cooling plate body 110 toward the middle of the liquid cooling plate along the length direction of the liquid cooling plate body 110. The width structure design of the plurality of second branch channels 114 can reduce the flow resistance of the plurality of first branch channels 112. The difference (the smaller the width of the second branch channel 114, the greater the flow resistance of the first branch channel 112 connected to it) causes the coolant in the first branch channel 112 near the coolant inlet 116 to flow slowly. The coolant can flow along the first main channel 111 in a direction away from the coolant inlet 116, and then flow into other first branch channels 112. This makes the coolant more evenly distributed on the upper surface of the liquid cooling plate body 110, thereby reducing the temperature difference between individual batteries in the battery module 200 and improving heat dissipation performance.

[0069] Example 4

[0070] like Figure 12 As shown, this embodiment discloses a battery assembly, including a battery module 200, and a liquid cooling plate 100 with a leaf vein biomimetic flow channel as in embodiment 1, embodiment 2 or embodiment 3. The battery module 200 includes a plurality of batteries arranged in parallel, and the battery module 200 is placed on the liquid cooling plate 100.

[0071] Specifically, the battery module 200 includes multiple batteries arranged in parallel. The battery module 200 is mounted on the upper cover plate 120, and the bottoms of the multiple batteries are in contact with the upper cover plate 120 of the liquid cooling plate 100. When the battery generates heat, the heat transfer path is: battery, coolant in the first cooling channel, through hole 115, coolant in the second cooling channel, and lower cover plate 130.

[0072] In this embodiment, the battery assembly places the battery module 200 on the liquid cooling plate 100. The liquid cooling plate 100, through the structural design of the first cooling channel and the second cooling channel, makes the coolant evenly distributed on the upper surface (first cooling channel) of the liquid cooling plate body 110, thereby effectively cooling multiple batteries, reducing the temperature difference between individual batteries in the battery module 200, and improving heat dissipation performance.

[0073] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A liquid cold plate having a vein biomimetic flow channel, characterized by, Includes the liquid cooling plate body (110). The upper surface of the liquid cooling plate body (110) is provided with a first cooling channel, and the lower surface is provided with a second cooling channel. The liquid cooling plate body (110) is also provided with a plurality of through holes (115) for connecting the first cooling channel and the second cooling channel. The first cooling channel includes a first main channel (111) arranged along the length of the liquid cooling plate body (110) and a plurality of first branch channels (112) distributed in a leaf vein pattern. One end of each of the plurality of first branch channels (112) is connected to the first main channel (111), and the other end is connected to its corresponding through hole (115). The second cooling channel includes a second main channel (113) arranged along the length of the liquid cooling plate body (110) and a plurality of second branch channels (114) distributed in a leaf vein pattern. One end of each of the plurality of second branch channels (114) is connected to the second main channel (113), and the other end is connected to its corresponding through hole (115). The widths of the multiple second branch channels (114) are different. Along the length of the liquid cooling plate body (110), from both ends of the liquid cooling plate body (110) toward the middle of the liquid cooling plate, the width of the second branch channels (114) gradually increases.

2. The liquid cold plate with leaf vein mimicking flow channels of claim 1, wherein, One end of the first main channel (111) is the coolant inlet (116), and one end of the second main channel (113) is the coolant outlet (117).

3. The liquid cold plate with leaf vein biomimetic flow channels of claim 2, wherein, The coolant inlet (116) and the coolant outlet (117) are located at the same end.

4. The liquid cold plate with leaf vein mimicking flow channels of claim 1, wherein, The widths of the multiple first branch channels (112) are the same.

5. The liquid cold plate with leaf vein mimicking flow channels of claim 1, wherein, Multiple first branch channels (112) are symmetrically distributed along the first main channel (111), and multiple second branch channels (114) are symmetrically distributed along the second main channel (113).

6. The liquid cold plate with leaf vein mimicking flow channels of claim 2, wherein, It also includes an outer box (180), which is a frame structure with an opening in the middle. The opening is adapted to the size and shape of the liquid cooling plate body (110), and the liquid cooling plate body (110) is installed in the opening of the outer box (180).

7. The liquid cold plate with leaf vein biomimetic flow channels of claim 6, wherein, It also includes an inlet pipe (140) and an outlet pipe (150), both of which are located on the same side wall of the outer box (180). The inlet pipe (140) is connected to the coolant inlet (116), and the outlet pipe (150) is connected to the coolant outlet (117).

8. The liquid cooling plate of claim 1, wherein, It also includes a heat transfer assembly, which includes an upper cover plate (120) and a lower cover plate (130). The upper cover plate (120) covers the upper surface of the liquid cooling plate body (110), and the lower cover plate (130) covers the lower surface of the liquid cooling plate body (110).

9. The liquid cooling plate of the leaf-vein biomimetic flow channel according to any one of claims 1-8, wherein, The liquid cooling plate body (110) is made of hydrophobic material.

10. A battery assembly comprising a battery module (200), characterized by It also includes the liquid-cooled plate with leaf vein-inspired flow channels as described in any one of claims 1-9. The battery module (200) includes a plurality of batteries arranged in parallel, and the battery module (200) is placed on the liquid cooling plate (100).

Images