Liquid cooling plate

Abstract

The invention discloses a liquid cooling plate, and relates to the technical field of battery energy storage. The liquid cooling plate comprises a plurality of cooling flow channels, the cooling flow channels are used for circulation of cooling liquid, the multiple cooling flow channels are arranged side by side, the ends of the multiple cooling flow channels are communicated with one another, the liquid cooling plate further comprises a flow guide plate, the flow guide plate is arranged at the ends of the cooling flow channels, a plurality of flow guide holes are formed in the flow guide plate, and therefore the flow direction of the cooling liquid is guided. The flow velocity of the cooling liquid at the bending part of the cooling flow channel is more uniform, a low-flow-velocity area even a flowing dead area at the bending part of the flow channel is avoided, vortexes and cyclones are avoided, the heat exchange efficiency at the bending part of the cooling flow channel is improved, and the problem of low local heat exchange efficiency of the liquid cooling plate is solved.

Description

Technical Field

[0001] The invention relates to the technical field of battery energy storage, and in particular to a liquid cooling plate. Background Art

[0002] In recent years, the battery energy storage industry has developed rapidly. As the core component of power storage, the operating temperature of the battery has an important impact on the performance, life and safety of the entire energy storage system. In the existing technology, liquid cooling plates are usually set to dissipate heat for the battery.

[0003] Currently, the liquid cooling plates on the market are arranged with several cooling channels inside. The cooling channels are used for the circulation of cooling liquid. For the convenience of maintenance, the inlet and outlet plugs of the cooling liquid need to be arranged on the same side, which causes a 180° bend in the cooling channel. The cooling liquid has low flow velocity areas or even dead zones at the bends in the channels, which often leads to problems such as impurity deposition, low local heat exchange efficiency and cavitation, thereby affecting the temperature consistency and service life of the entire battery. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a liquid cooling plate in order to overcome the defects in the prior art that the liquid flow velocity at the bends of the cooling channel of the liquid cooling plate is uneven and the flow direction is uncontrolled, resulting in low local heat exchange efficiency.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides a liquid cooling plate, which comprises a plurality of cooling channels, wherein the cooling channels are used for circulating cooling liquid, the plurality of cooling channels are arranged in parallel, and the ends of the plurality of cooling channels are interconnected. The liquid cooling plate also comprises a guide plate, wherein the guide plate is arranged at the ends of the cooling channels, and the guide plate is provided with a plurality of guide holes.

[0007] In this solution, guide plates are arranged at both ends of the cooling channel, and a plurality of guide holes are provided on the guide plates to guide the flow direction of the cooling liquid, so that the flow velocity of the cooling liquid at the bend of the cooling channel is more uniform, avoiding the occurrence of low flow velocity areas or even flow dead zones at the bend of the channel, avoiding the occurrence of vortices and cyclones, improving the heat exchange efficiency at the bend of the cooling channel, and solving the problem of low local heat exchange efficiency of the liquid cooling plate.

[0008] Preferably, the guide plate includes a first guide plate, and the first guide plate is arranged at a boundary between adjacent cooling channels.

[0009] In this solution, by setting a first guide plate at the boundary between adjacent cooling channels, the flow direction of the cooling liquid at the boundary between adjacent cooling channels can be guided, avoiding the formation of low flow velocity areas or even flow dead zones at the boundaries of the cooling channels, making the cooling liquid flow more smoothly, thereby enabling more efficient heat exchange.

[0010] Preferably, the liquid cooling plate comprises a plurality of ribs, the plurality of ribs are arranged in parallel and at intervals to form the cooling channel, and one end of the first guide plate abuts against one end of the ribs.

[0011] In the present embodiment, the liquid cooling plate is provided with a plurality of ribs, and the plurality of ribs are arranged in parallel and spaced apart, and a cooling channel is formed between two adjacent ribs. By abutting one end of the first guide plate against one end of the rib, the guide plate can cover the entire bending portion, and the cooling liquid can fully flow through the guide holes on the guide plate, so that the guide effect of the guide plate is better, thereby further improving the heat exchange effect of the liquid cooling plate.

[0012] Preferably, the guide plate further includes a second guide plate, and the second guide plate is arranged in the middle of two adjacent cooling channels.

[0013] In this solution, in addition to the first guide plate, the guide plate also includes a second guide plate. The second guide plate is arranged in the middle of two adjacent cooling channels, so as to guide the cooling liquid in the middle of the two adjacent cooling channels. By setting the second guide plate on the basis of the first guide plate, the guiding effect of the guide plate can be further improved, thereby making the heat exchange effect of the liquid cooling plate better.

[0014] Preferably, an extending direction of the guide plate is consistent with an extending direction of the cooling channel.

[0015] In this solution, the extension direction of the guide plate is consistent with the extension direction of the cooling channel, so that the guide plate can better guide the flow direction of the cooling liquid, further improving the heat exchange effect of the liquid cooling plate.

[0016] Preferably, one side of the guide plate is a curved surface, the curved surface is arranged on a side of the guide plate close to the inflow direction of the cooling liquid, and the curved surface is bent toward the inflow direction of the cooling liquid.

[0017] In this solution, the guide plate is configured as an arc surface on one side close to the inflow direction of the cooling liquid, and the arc surface is bent toward the inflow direction of the cooling liquid, so as to better guide the cooling liquid to flow into the guide hole, and then flow to the adjacent cooling channel through the guide hole.

[0018] Preferably, the plurality of guide holes extend in a horizontal direction.

[0019] In this solution, by setting the guide holes to extend in the horizontal direction, the extension direction of the guide holes is consistent with the flow direction of the cooling liquid, thereby reducing the resistance to the flow of the cooling liquid and better guiding the cooling liquid to the adjacent cooling channel.

[0020] Preferably, the guide holes include a first guide hole and a second guide hole, the first guide hole has a larger aperture than the second guide hole, the first guide hole is arranged in the middle of the guide plate, and the second guide holes are arranged on both sides of the first guide hole.

[0021] In the present solution, the guide holes are divided into two types: a first guide hole and a second guide hole. The first guide hole is arranged in the middle of the guide plate, and the second guide holes are arranged on both sides of the first guide hole. The apertures of the first guide hole and the second guide hole are different. Since the flow rate of the cooling liquid in the middle of the guide plate is larger, the aperture of the first guide hole is set to be larger to reduce the flow resistance here, and can still force part of the cooling liquid to be diverted to the second guide holes on both sides; and the flow rate of the cooling liquid on both sides of the guide plate is small, so the aperture of the second guide hole is set to be smaller, so that it can supplement the cooling liquid in the low flow velocity area at the bends at both ends of the cooling channel, so as to achieve the goal of uniform flow of the cooling liquid, and further improve the guide effect of the guide plate.

[0022] Preferably, the liquid cooling plate further comprises plugs, the plugs are arranged at both ends of the cooling channel, the guide plate is arranged on the plugs, and the plugs and the guide plate are integrally formed.

[0023] In this solution, the guide plate is arranged on the plug. During processing, the plug and the guide plate are formed as one piece, which makes it easier to manufacture the guide plate, improves the production efficiency of the liquid cooling plate and reduces the production cost.

[0024] Preferably, the liquid cooling plate includes a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are arranged at the same end of the liquid cooling plate, the cooling channel includes a first channel and a second channel, the first channel and the second channel are connected, the liquid inlet is arranged in the first channel, and the liquid outlet is arranged in the second channel.

[0025] In this solution, the cooling channel includes a first channel and a second channel. The cooling liquid enters the first channel from the liquid inlet, then enters the second channel from the first channel, and is finally discharged from the liquid outlet. The liquid inlet and the liquid outlet are arranged at the same end of the liquid cooling plate, thereby making it easier to maintain the liquid cooling plate.

[0026] The positive and progressive effects of the present invention are:

[0027] The present invention provides a liquid cooling plate, which comprises a plurality of cooling channels. Guide plates are arranged at both ends of the cooling channels, and a plurality of guide holes are arranged on the guide plates, so as to guide the flow direction of the cooling liquid, so that the flow velocity of the cooling liquid at the bend of the cooling channel is more uniform, and the low flow velocity area or even the flow dead zone at the bend of the channel is avoided, and the occurrence of vortexes and cyclones is avoided, thereby improving the heat exchange efficiency at the bend of the cooling channel and solving the problem of low local heat exchange efficiency of the liquid cooling plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. 4 is a schematic diagram of a three-dimensional structure of a liquid cooling plate and a battery according to an embodiment of the present invention.

[0029] Figure 2 FIG. 4 is a schematic diagram of a three-dimensional structure of a liquid cooling plate according to an embodiment of the present invention.

[0030] Figure 3 FIG. 4 is a top view of the interior of a liquid cooling plate according to an embodiment of the present invention.

[0031] Figure 4 The figure is a schematic three-dimensional structure diagram of a plug and a guide plate according to an embodiment of the present invention.

[0032] Figure 5 for Figure 4 Magnified view of part A.

[0033] Figure 6 FIG. 4 is a transverse cross-sectional view of a guide plate according to an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] Battery 1

[0036] Liquid cooling plate 2

[0037] Liquid cooling plate body 21

[0038] First tray 211

[0039] Second tray 212

[0040] Border 22

[0041] Cooling channel 23

[0042] First flow channel 231

[0043] Second flow channel 232

[0044] Deflector 24

[0045] First guide plate 241

[0046] Second guide plate 242

[0047] Diversion hole 243

[0048] The first guide hole 2431

[0049] The second guide hole 2432

[0050] Arc 244

[0051] Rib 25

[0052] Plug 26

[0053] Front plug 261

[0054] Rear plug 262

[0055] Liquid inlet plug 27

[0056] Liquid outlet plug 28

[0057] Cooling liquid flow direction X DETAILED DESCRIPTION

[0058] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the following examples.

[0059] like Figure 1-Figure 3 As shown, this embodiment provides a liquid cooling plate 2 for dissipating heat for the battery 1. The liquid cooling plate 2 includes a plurality of cooling channels 23, and the cooling channels 23 are used for circulating cooling liquid, and the battery 1 performs heat exchange through the cooling liquid. The plurality of cooling channels 23 are arranged in parallel, and the ends of the plurality of cooling channels 23 are interconnected. The liquid cooling plate 2 also includes a guide plate 24, and the guide plate 24 is provided at the end of the cooling channel 23. The guide plate 24 is provided with a plurality of guide holes 243, so as to guide the flow direction of the cooling liquid, so that the flow velocity of the cooling liquid at the bend of the cooling channel 23 is more uniform, and the low flow velocity area or even the flow dead zone at the bend of the channel is avoided, and the vortex and cyclone are avoided, so as to improve the heat exchange efficiency at the bend of the cooling channel 23, and solve the problem of low local heat exchange efficiency of the liquid cooling plate 2.

[0060] In this embodiment, the liquid cooling plate 2 includes a liquid cooling plate body 21 and a frame 22. The liquid cooling plate body 21 is divided into a first tray 211 and a second tray 212. The first tray 211 and the second tray 212 are extruded by the same mold and integrated by stir friction welding.

[0061] In this embodiment, the liquid cooling plate body 21 is made of extruded aluminum profiles, which has a simple structure and is easy to process. In other embodiments, other materials of the liquid cooling plate body 21 that are considered suitable by those skilled in the art may also be used.

[0062] In this embodiment, the guide plate 24 includes a first guide plate 241 and a second guide plate 242, which are arranged at different positions. The first guide plate 241 is arranged at the boundary of adjacent cooling channels 23, so as to guide the flow direction of the cooling liquid at the boundary of adjacent cooling channels 23, avoid the formation of a low flow rate area or even a flow dead zone at the boundary of the cooling channel 23, make the cooling liquid flow more smoothly, and thus can more effectively perform heat exchange.

[0063] The second guide plate 242 is disposed in the middle of two adjacent cooling channels 23, so as to guide the cooling liquid in the middle of the two adjacent cooling channels 23. By providing the second guide plate 242 on the basis of the first guide plate 241, the guiding effect of the guide plate 24 can be further improved, so that the heat exchange effect of the liquid cooling plate 2 is better. In other embodiments, only the first guide plate 241 or the second guide plate 242 can be provided.

[0064] In this embodiment, the liquid cooling plate 2 includes a plurality of ribs 25, which are arranged in parallel and spaced apart to form a cooling channel 23, and the front and rear ends of the ribs 25 are processed by CNC to form a bending channel. One end of the first guide plate 241 abuts against one end of the rib 25, so that the guide plate 24 can cover the entire bending part, and the cooling liquid can fully flow through the guide holes 243 on the guide plate 24, so that the guide effect of the guide plate 24 is better, further improving the heat exchange effect of the liquid cooling plate 2. In other embodiments, other structures deemed appropriate by those skilled in the art can also be selected to form the cooling channel 23.

[0065] The extension direction of the guide plate 24 is consistent with the extension direction of the cooling channel 23 , so that the guide plate 24 can better guide the flow direction of the cooling liquid, further improving the heat exchange effect of the liquid cooling plate 2 .

[0066] like Figure 4-Figure 6 As shown in the figure, the cooling liquid flow direction X is shown, one side of the guide plate 24 is an arc surface 244, and the arc surface 244 is arranged on the side of the guide plate 24 close to the cooling liquid inflow direction. The arc surface 244 bends toward the cooling liquid inflow direction, so as to better guide the cooling liquid to flow into the guide hole 243, and then flow to the adjacent cooling channel 23 through the guide hole 243.

[0067] In this embodiment, a plurality of guide holes 243 extend in the horizontal direction, and the extension direction of the guide holes 243 is consistent with the flow direction of the cooling liquid, thereby reducing the resistance to the flow of the cooling liquid and better guiding the cooling liquid to the adjacent cooling channel 23. In other embodiments, other extension directions of the guide holes 243 that are deemed appropriate by those skilled in the art may also be selected.

[0068] In this embodiment, the guide hole 243 includes a first guide hole 2431 and a second guide hole 2432. The aperture of the first guide hole 2431 is larger than that of the second guide hole 2432. The first guide hole 2431 is arranged in the middle of the guide plate 24, and the second guide hole 2432 is arranged on both sides of the first guide hole 2431. The apertures of the first guide hole 2431 and the second guide hole 2432 are different. Since the flow rate of the cooling liquid in the middle of the guide plate 24 is larger, the aperture of the first guide hole 2431 is set larger, which can reduce the flow resistance here and achieve the purpose of diverting the cooling liquid to the second guide holes 2432 on both sides. The flow rate of the cooling liquid on both sides of the guide plate 24 is small, so the aperture of the second guide hole 2432 is set smaller, so that it can supplement the cooling liquid in the low flow rate area at the bends of the two ends of the cooling channel 23, so as to achieve the goal of uniform flow rate of the cooling liquid, and further improve the guiding effect of the guide plate 24.

[0069] In other embodiments, only one kind of guide holes 243 may be arranged, or a plurality of guide holes 243 with different diameters, densities and positions may be arranged, and the specific selection is made by those skilled in the art according to actual conditions.

[0070] The liquid cooling plate 2 also includes a plug 26, which is arranged at both ends of the cooling channel 23, namely a front plug 261 and a rear plug 262. The guide plate 24 is arranged on the plug 26. During processing, the plug 26 and the guide plate 24 are integrally formed, so as to facilitate the production of the guide plate 24, thereby improving the production efficiency of the liquid cooling plate 2 while reducing the production cost.

[0071] In this embodiment, the front and rear ends of the liquid cooling plate body 21 are CNC-cut to form positions for the front plug 261 and the rear plug 262 to be installed. The front plug 261 and the rear plug 262 are extruded by the same mold. The first tray 211, the second tray 212, the front plug 261, the rear plug 262, the liquid inlet plug 27 and the liquid outlet plug 28 are integrated by welding. In other embodiments, other methods deemed appropriate by those skilled in the art may also be selected to assemble the various components.

[0072] In this embodiment, the guide plate 24 is formed by using a shovel tooth process at an appropriate position of the plug 26, which is more convenient to process and has a lower cost. In other embodiments, the guide plate 24 may be formed by other methods deemed appropriate by those skilled in the art. The curved surface 244 of the guide plate 24 is formed by the radian of the shovel teeth themselves, so that the processing of the guide plate 24 is more convenient.

[0073] The liquid cooling plate 2 includes a liquid inlet and a liquid outlet. The liquid inlet plug 27 is provided on the liquid inlet for conveying cooling liquid into the cooling channel 23. The liquid outlet plug 28 is provided on the liquid outlet for outputting the cooling liquid in the cooling channel 23. The cooling channel 23 includes a first channel 231 and a second channel 232. The first channel 231 and the second channel 232 are connected. The liquid inlet is provided on the first channel 231, and the liquid outlet is provided on the second channel 232. The cooling liquid enters the first channel 231 from the liquid inlet, then enters the second channel 232 from the first channel 231, and finally is discharged from the liquid outlet. The liquid inlet and the liquid outlet are provided at the same end of the liquid cooling plate 2, so as to facilitate the maintenance of the liquid cooling plate 2.

[0074] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship of the device or element in normal use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation at any time, and therefore cannot be understood as a limitation of the present invention in this regard.

[0075] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A liquid cooling plate, comprising a plurality of cooling channels, wherein the cooling channels are used for circulating cooling liquid, the plurality of cooling channels are arranged in parallel, and the ends of the plurality of cooling channels are interconnected, wherein: The liquid cooling plate further comprises a guide plate, which is arranged at the end of the cooling channel and has a plurality of guide holes.

2. The liquid cooling plate according to claim 1, characterized in that: The guide plate includes a first guide plate, and the first guide plate is arranged at a boundary between adjacent cooling channels.

3. The liquid cooling plate according to claim 2, characterized in that: The liquid cooling plate includes a plurality of ribs, which are arranged in parallel and at intervals to form the cooling channel, and one end of the first guide plate abuts against one end of the rib.

4. The liquid cooling plate according to claim 2, characterized in that: The guide plate further includes a second guide plate, and the second guide plate is arranged in the middle of two adjacent cooling channels.

5. The liquid cooling plate according to claim 1, wherein: An extending direction of the guide plate is consistent with an extending direction of the cooling channel.

6. The liquid cooling plate according to claim 1, characterized in that: One side of the guide plate is a curved surface, the curved surface is arranged on a side of the guide plate close to the inflow direction of the cooling liquid, and the curved surface is bent toward the inflow direction of the cooling liquid.

7. The liquid cooling plate according to claim 1, wherein: The plurality of guide holes extend in a horizontal direction.

8. The liquid cooling plate according to claim 1, wherein: The guide holes include a first guide hole and a second guide hole. The first guide hole has a larger aperture than the second guide hole. The first guide hole is located in the middle of the guide plate, and the second guide holes are located on both sides of the first guide hole.

9. The liquid cooling plate according to claim 1, wherein: The liquid cooling plate further comprises plugs, which are arranged at both ends of the cooling channel, and the guide plate is arranged on the plugs, and the plugs and the guide plate are integrally formed.

10. The liquid cooling plate according to claim 1, wherein: The liquid cooling plate includes a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are arranged at the same end of the liquid cooling plate, the cooling channel includes a first channel and a second channel, the first channel and the second channel are connected, the liquid inlet is arranged in the first channel, and the liquid outlet is arranged in the second channel.

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