Heat exchange device, battery pack and electric equipment

Abstract

The application provides a heat exchange device, a battery pack and an electric equipment. The heat exchange device comprises a plate body, a protruding part, the protruding part is arranged on one side of the plate body and is integrally formed with the plate body, and a first flow channel is formed between the protruding part and the plate body. The heat exchange device can reduce the width of the first flow channel, improve the space utilization and improve the heat exchange capacity.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a heat exchange device, a battery pack, and an electrical device. Background Technology

[0002] With the increasing popularity of new energy vehicles, the requirements for battery packs in these vehicles are becoming increasingly stringent. Temperature has a significant impact on battery pack performance, leading to higher demands on heat exchange. Heat exchange devices typically include flow channels and heat exchange plates. The flow channels have channels through which a heat exchange medium circulates, thereby achieving heat exchange for the battery pack. For example, a heat exchange device can be a cold plate, where the heat exchange medium is also the cooling medium, used to cool the battery pack.

[0003] However, the flow channels of the heat exchanger are all located on flow channel plates, and the temperature distribution plate is a flat plate. The overall space utilization of the heat exchanger is low, which reduces the heat exchange capacity of the heat exchanger and thus affects the performance of the battery pack. Utility Model Content

[0004] In view of the above problems, this utility model provides a heat exchange device, a battery pack, and electrical equipment to improve the space utilization and heat exchange capacity of the heat exchange device, as well as the performance of the battery pack.

[0005] The first aspect of this utility model provides a heat exchange device, comprising:

[0006] board body;

[0007] A protrusion is disposed on one side of the plate body and integrally formed with the plate body, and a first flow channel is formed between the protrusion and the plate body.

[0008] In some possible implementations, the plate body and the protrusion are formed by superplastic forming and / or diffusion bonding processes.

[0009] In some possible implementations, the plate body includes a stacked heat spreader plate and a flow channel plate, and the protrusion is disposed on the side of the heat spreader plate opposite to the flow channel plate and is integrally formed with the heat spreader plate.

[0010] In some possible implementations, a second flow channel is formed between the heat spreader and the flow channel plate, and the second flow channel communicates with the first flow channel.

[0011] In some possible implementations, the heat spreader is provided with at least two first connecting holes, the first connecting holes connecting the second flow channel and the first flow channel.

[0012] In some possible implementations, the at least two first connecting holes are arranged sequentially along the extension direction of the first flow channel.

[0013] In some possible implementations, a second flow channel is formed between the heat spreader and the flow channel plate, the second flow channel being independent of the first flow channel.

[0014] In some possible implementations, the heat exchange device further includes a connector disposed on the side of the heat exchange plate opposite to the flow channel plate and communicating with the second flow channel.

[0015] In some possible implementations, the thickness of the protrusions is the same.

[0016] In some possible implementations, the width of the first flow channel is 3-8 mm along a direction perpendicular to the thickness direction of the plate body and perpendicular to the extension direction of the first flow channel.

[0017] In some possible implementations, the plate body has a first region and a second region surrounding the first region;

[0018] The first region of the plate body is configured to contact the battery cell, and the second region of the plate body is provided with the protrusion.

[0019] In some possible implementations, the protrusion includes:

[0020] The main body extends along the edge of the plate body;

[0021] The two parts are located on one side of the main body, near the center of the plate body.

[0022] In some possible implementations, the centerline of the split is perpendicular to the centerline of the main body.

[0023] In some possible implementations, the body includes:

[0024] The first segment extends along the length of the plate body;

[0025] The second segment is connected to the first segment and extends along the width direction of the plate body;

[0026] Both the first segment and the second segment are provided with the sub-body, and the number of the sub-body provided on the first segment is greater than the number of the sub-body provided on the second segment.

[0027] In some possible implementations, the protrusions have at least two portions, and at least a portion of the protrusions are stacked along the thickness direction of the plate body, with a third flow channel formed between two adjacent protrusions;

[0028] In two adjacent protrusions along the thickness direction of the plate body, the protrusion closest to the plate body is provided with at least two second connecting holes, the at least two second connecting holes connecting the first flow channel and the third flow channel, or two adjacent third flow channels.

[0029] In some possible implementations, the protrusion is a flat surface, a curved surface, or a wavy surface on the top surface of the plate body.

[0030] A second aspect of this utility model also provides a battery pack, including the heat exchange device as described above, and battery cells disposed on the heat exchange device.

[0031] A third aspect of this utility model provides an electrical device, comprising:

[0032] An electrical device and a battery pack as described above; the battery pack is electrically connected to the electrical device and is used to supply power to the electrical device.

[0033] The heat exchange device, battery pack, and electrical equipment provided in this application include a plate body and a protrusion. The protrusion is located on one side of the plate body and is integrally formed with the plate body. That is, the protrusion and the plate body are formed in one piece through a single manufacturing process, without the need for secondary processing such as welding. This reduces assembly and improves structural strength and precision. The first flow channel formed between the protrusion and the plate body can have a smaller width, eliminating the need for any adjustment or avoidance of the tray or battery pack, thus improving the space utilization of the battery pack and achieving tray standardization.

[0034] In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the heat exchange device, battery pack, and electrical equipment provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is an exploded view of the heat exchange device in an embodiment of this utility model;

[0037] Figure 2 This is an assembly diagram of the heat exchange device in an embodiment of the present utility model;

[0038] Figure 3 This is a top view of the temperature distribution plate in an embodiment of this utility model;

[0039] Figure 4 This is a partial front view of the heat spreader in an embodiment of the present utility model;

[0040] Figure 5 This is a partial schematic diagram of the back of the heat spreader in an embodiment of the present invention;

[0041] Figure 6 This is a partial cross-sectional view of the temperature distribution plate in an embodiment of this utility model.

[0042] Explanation of reference numerals in the attached figures:

[0043] 10-Plate body; 11-Heat distribution plate; 12-Flow channel plate; 13-Second flow channel; 14-First connecting hole;

[0044] 20 - Protrusion; 21 - First flow channel; 22 - Main body; 23 - First segment; 24 - Second segment; 25 - Separate body;

[0045] 30-Connector. Detailed Implementation

[0046] The heat exchange device includes a stamped plate, a vapor chamber plate, and a bridging plate. The stamped plate and the vapor chamber plate are welded (e.g., brazed), and a flow channel is provided between them. The bridging plate is welded to the side of the vapor chamber plate opposite to the stamped plate; that is, the stamped plate is welded to one side of the vapor chamber plate, and the bridging plate is welded to the other side. A flow channel is also provided between the bridging plate and the vapor chamber plate, and this channel communicates with the channel between the bridging plate and the vapor chamber plate. During heat exchange, the fluid circulates within the corresponding flow channel and can enter or exit through joints. For example, if the fluid is a refrigerant, the refrigerant's evaporation and heat absorption properties are utilized to exchange heat with the battery cell, thereby cooling the battery cell.

[0047] In the aforementioned heat exchange device, the bridging plate is typically stamped and welded to the heat spreader plate. The welding surface of the bridging plate is the surface of the heat spreader plate that contacts the battery cells. The bridging plate needs to be welded to the non-cell area of ​​the heat spreader plate to ensure that the cell area of ​​the heat spreader plate is flat, thereby ensuring the assembly of the battery cells. A welding area of ​​at least 5mm needs to be reserved on both sides of the bridging plate to ensure a firm connection between the bridging plate and the heat spreader plate. This increases the width of the bridging plate, reduces the space utilization of the heat exchange device, decreases the heat exchange capacity of the heat exchange device, and consequently affects the performance of the battery pack.

[0048] Furthermore, the small distance between the battery cells and the side beams of the tray makes it difficult to place the bridging plate, requiring the side beams to be cut to avoid the bridging plate. This inconveniences battery pack manufacturing, and the tray is difficult to process and standardize. Alternatively, reducing the number of battery cells and increasing the distance between the cells and the side beams would reduce the space utilization rate of the battery pack.

[0049] This utility model provides a heat exchange device, a battery pack, and electrical equipment, including a plate body and a protrusion. The protrusion is integrally formed with the plate body and forms a first flow channel, eliminating the need for secondary processing such as welding, reducing assembly, and improving structural strength and precision. Furthermore, the width of the first flow channel can be smaller, eliminating the need for any adjustments or clearances to the tray or battery pack, improving the space utilization of the battery pack, and achieving tray standardization.

[0050] To make the above-mentioned objectives, features, and advantages of the embodiments of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0051] This utility model provides an electrical device, which includes an electrical component and a battery pack. The battery pack is electrically connected to the electrical component and supplies power to it. The electrical device can be a vehicle, such as a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. Correspondingly, the electrical component can be the vehicle's drive mechanism or its control system. The electrical device can also be other energy storage devices, such as mobile phones, portable devices, laptops, electric toys, power tools, ships, and spacecraft. Spacecraft can include airplanes, rockets, space shuttles, or spacecraft.

[0052] The battery pack, for example, is a lithium-ion battery pack, which has high specific energy of individual cells and low internal resistance, resulting in good driving range. The battery pack can be integrated in a CTM (Cell To Module), CTP (Cell To Pack), or CTB (Cell To Body) manner. This application does not limit the specific type or integration method of the battery pack; it can be selected according to specific needs.

[0053] A battery pack may include a heat exchange device and battery cells mounted on the heat exchange device. The heat exchange device and the battery cells can be in contact to exchange heat. Heat exchange can be understood as the heat exchange device cooling or heating the battery cells. Specifically, the type of fluid flowing within the heat exchange device can be freely selected depending on the environment in which the battery cells are located. For example, when the heat exchange device is used to cool the battery cells, the fluid may include refrigerant, CO2, ethylene glycol, or water.

[0054] See Figures 1 to 6 The heat exchange device includes a plate body 10 and a protrusion 20. The protrusion 20 is disposed on one side of the plate body 10 and is integrally formed with the plate body 10. A first flow channel 21 is formed between the protrusion 20 and the plate body 10.

[0055] like Figure 1 As shown, the protrusion 20 is, for example, disposed on the upper side of the plate body 10. The protrusion 20 and the plate body 10 are integrally formed, that is, the protrusion 20 and the plate body 10 are formed in one step through a single manufacturing process, without the need for secondary processing such as welding, which can reduce assembly and improve structural strength and precision. The protrusion 20 and the plate body 10 enclose to form the first flow channel 21. The width of the first flow channel 21 can be smaller, without the need for any adjustment or avoidance of the tray or battery pack, thereby improving the space utilization of the battery pack and realizing the standardization of the tray.

[0056] The plate body 10 is formed using superplastic forming and / or diffusion bonding processes. Superplastic forming (SPF) refers to a processing technique where materials exhibit superplasticity under specific temperature and strain rate conditions, and are formed by pressing the material into a mold using a pressure difference. More simply, superplastic forming utilizes the superplasticity of materials, i.e., their super-deformation capacity. For example, the elongation of metals is typically no more than 90%, while in a superplastic state, the maximum elongation can reach 1000%-2000%. Materials in this state are like molten sugar or glass in a blown state, capable of being blown or extruded into the desired complex structures.

[0057] Diffusion bonding (DB) is a process where, under high temperature and pressure, the surfaces to be bonded approach each other, undergoing localized plastic deformation. After a certain period, the atoms in the bonding layer diffuse into each other, forming a reliable overall bond. More simply, diffusion bonding involves the atoms at the interface of contacting materials diffuse into each other in a superplastic state, forming a diffusion layer and thus achieving a complete connection between the two materials.

[0058] In this way, the plate body 10 and the protrusion 20 can be formed in one step using superplastic forming and / or diffusion bonding processes, reducing stamping and welding processes, and also reducing the overall weight of the heat exchange device, making its structure more integrated and improving its overall stability. In some possible examples, the plate body 10 and the protrusion 20 are formed using a superplastic forming-diffusion bonding process, that is, under the same environment (such as temperature, pressure, etc.), the superplastic forming and diffusion bonding processes are performed simultaneously in one manufacturing process, thereby completing the integral forming of complex hollow multilayer structural components.

[0059] like Figures 1 to 6 As shown, in some possible examples, the board body 10 has a first region and a second region surrounding the first region; the first region of the board body 10 is configured to contact the battery cell, and the second region of the board body 10 is provided with a protrusion 20. The first region and the second region are adjacent to each other, and the second region may surround the first region, that is, the second region is located at the edge of the board body 10, and the first region is located at the center of the board body 10. The second region may also be located on one side or both sides of the first region. The first region of the board body 10 contacts the battery cell, and its surface facing the battery cell is flat. The second region of the board body 10 is provided with the protrusion 20 and may also have a connector 30 welded on.

[0060] See Figures 1 to 6 The plate body 10 includes a flow channel plate 12 and a heat spreader plate 11, which are stacked together. A protrusion 20 is disposed on the side of the heat spreader plate 11 away from the flow channel plate 12 and is integrally formed with the heat spreader plate 11. A second flow channel 13 is formed between the flow channel plate 12 and the heat spreader plate 11.

[0061] The protrusion 20 and the heat spreader 11 are an integral structure, while the heat spreader 11 and the flow channel plate 12 are separate structures. The protrusion 20 and the flow channel plate 12 are located on opposite sides of the heat spreader 11. Figure 1 Taking the direction as an example, the protrusion 20 is located on the upper side of the heat spreader 11, and the flow channel plate 12 is located on the lower side of the heat spreader 11. The protrusion 20 and the heat spreader 11 are integrally formed by superplastic forming-diffusion bonding process. The protrusion 20 and the heat spreader 11 have a smooth transition and no superfluous structure.

[0062] The heat spreader 11 is made of aluminum alloy or titanium alloy, which has good plasticity / superplasticity and is easy to process and manufacture. For example, the heat spreader 11 is made of aluminum alloy to reduce production costs. The flow channel plate 12 can be made of the same material as the heat spreader 11 or a different material. For example, the flow channel plate 12 can be made of the same material as the heat spreader 11 to facilitate welding connection between the flow channel plate 12 and the heat spreader 11.

[0063] In one possible example, the second flow channel 13 can be disposed on the flow channel plate 12, for example, the flow channel plate 12 is formed into the second flow channel 13 by a stamping process. That is, the second flow channel 13 is formed by stamping on the flat surface according to a preset flow channel trajectory, so as to simplify the manufacturing process, improve production efficiency, and reduce manufacturing costs. In this case, the surface of the heat spreader 11 facing the flow channel plate 12 is flat to cover the second flow channel 13 and prevent leakage.

[0064] In other possible examples, the second flow channel 13 is disposed on both the flow channel plate 12 and the heat spreader plate 11, that is, part of the second flow channel 13 is disposed on the flow channel plate 12 and the other part is disposed on the heat spreader plate 11. The surfaces of the flow channel plate 12 and the heat spreader plate 11 that are opposite to each other are respectively provided with grooves, and the two grooves are joined together to form the second flow channel 13.

[0065] In the two examples above, after the heat spreader 11 and the flow channel plate 12 are aligned, the heat spreader 11 and the flow channel plate 12 can be fixed by welding or bolts.

[0066] In some possible implementations, the second flow channel 13 is independent of the first flow channel 21, meaning that the second flow channel 13 and the first flow channel 21 are spaced apart and not connected. This allows the second flow channel 13 and the first flow channel 21 to be filled with different media as needed, and the flow direction and velocity of the media in each channel can be determined separately to match the heat source / cold source distribution and improve heat exchange efficiency. Furthermore, the independently configured second flow channel 13 and first flow channel 21 can also avoid thermal short circuits and reduce leakage.

[0067] In some possible implementations, the second flow channel 13 is connected to the first flow channel 21, meaning that the same medium flows through both the second flow channel 13 and the first flow channel 21. This allows for flow branching and confluence within the second flow channel 13 using the first flow channel 21, saving space and reducing the size of the heat exchange device. Furthermore, using the first flow channel 21 allows for flexible setting of the medium flow direction in the second flow channel 13, avoiding large temperature differences and improving overall temperature uniformity and heat dissipation capacity, thus enhancing battery pack performance.

[0068] In embodiments where the second flow channel 13 is connected to the first flow channel 21, in some possible examples, there are multiple second flow channels 13, with at least some second flow channels 13 spaced apart. The spaced-apart second flow channels 13 can all be connected to the first flow channel 21, utilizing the first flow channel 21 for flow splitting or merging. For example, each second flow channel 13 is spaced apart, and there are two first flow channels 21. One end of each second flow channel 13 is connected to one of the first flow channels 21, and the other end of each second flow channel 13 is connected to the other first flow channel 21. In this way, one first flow channel 21 is used for flow splitting, and the other first flow channel 21 is used for flow merging, which can improve the temperature uniformity of the heat exchange plate 11, thereby improving the heat exchange effect.

[0069] The heat exchange plate 11 is provided with at least two first connecting holes 14, which connect the second flow channel 13 and the first flow channel 21. The first connecting holes 14 on the heat exchange plate 11 allow for better alignment between the first connecting holes 14 and the first flow channel 21, reducing deviation. Furthermore, by connecting the first flow channel 21 and the second flow channel 13 using the first connecting holes 14, fluid integration and flow distribution are achieved, thereby ensuring effective heat exchange.

[0070] During the molding process, at least two first connecting holes 14 can also serve as air inlets and exhaust outlets for the first flow channel 21. This allows for the integral molding of the protrusion 20 and the heat spreader 11, while also ensuring the alignment of the first connecting holes 14 and the first flow channel 21. Along the extension direction of the first flow channel 21, at least two first connecting holes 14 are arranged sequentially to connect the first flow channel 21 and the second flow channel 13, thereby achieving heat exchange.

[0071] The axis of the first connecting hole 14 intersects the extension line of the first flow channel 21. This positions the first connecting hole 14 primarily in the middle of the first flow channel 21, reducing the offset of the first connecting hole 14 relative to the first flow channel 21. The size and position of at least two first connecting holes 14 are selected as needed; the sizes of the at least two first connecting holes 14 can be the same or different, and are related to the cross-sectional area of ​​the first flow channel 21 at the location of the first connecting hole 14.

[0072] The shape of the first flow channel 21 can be combined with the diameter of the first connecting hole 14 to adjust the flow rate. The cross-sectional area of ​​the first flow channel 21 is variable, and the diameter of the first connecting hole 14 can also be increased accordingly. That is, the cross-sectional area of ​​the first flow channel 21 is adapted to the diameter of the first connecting hole 14, which can avoid the flash evaporation of fluid (such as refrigerant) caused by the diameter being too small.

[0073] At least two first connecting holes 14 are connected to the first flow channel 21. The height and width of the first flow channel 21 can be designed more flexibly, taking into account the actual space of the battery pack. The height direction is the thickness direction of the plate body 10, and also the stacking direction of the flow channel plate 12 and the heat spreader plate 11. The width direction is perpendicular to the height direction and perpendicular to the extension direction of the first flow channel 21. For example, the width of the first flow channel 21 can be narrower, and the height of the first flow channel 21 can be higher, better adapting to the space within the battery pack. This allows the first flow channel 21 to be completely arranged in the narrow space between the cell and the tray, without requiring any changes to the size of the tray.

[0074] Understandably, to maintain a constant cross-sectional area of ​​the first flow channel 21 under the same flow rate, the width or height of the first flow channel 21 can be adjusted. The height of the first flow channel 21 is H, the width is W, and the cross-sectional area is A, where A = W × H. In this embodiment, a smaller width of the first flow channel 21 is preferable to save more space. For example, the width W of the first flow channel 21 is 3mm to 8mm, and the height H of the first flow channel 21 is A / 8 to A / 3. To reduce pressure drop, the cross-sectional area of ​​the first flow channel 21 can be larger, meaning the height of the first flow channel 21 can be higher.

[0075] Continue reading Figures 1 to 6 In some possible examples, the protrusions 20 have the same thickness, that is, the thickness of the protrusions 20 is uniform. In this way, the force is uniform in the first flow channel 21, the wall thickness is the same everywhere, and the thickness consistency is good. The protrusions 20 do not need to be stamped, and their thickness can be even thicker to improve the pressure resistance.

[0076] In some possible examples, the top surface of the protrusion 20 away from the plate body 10 is a plane, a curved surface, or a wavy surface. That is, along the extension direction of the first flow channel 21, the first flow channel 21 can be a variable cross-section flow channel, and the top wall shape of the first flow channel 21 can be a plane, a curved surface, a wavy surface, or other shapes, such as an irregular shape with concave and convex features.

[0077] In some possible implementations, the heat spreader 11 includes at least two protrusions 20, at least some of which are stacked along the thickness direction of the plate body 10, forming a third flow channel between adjacent protrusions 20. Among two adjacent protrusions 20 along the thickness direction of the plate body 10, the protrusion 20 closer to the plate body 10 has at least two second connecting holes, which connect the first flow channel 21 and the third flow channel, or two adjacent third flow channels. In this way, multiple flow channels can be stacked along the thickness direction of the plate body 10 at the same location, forming a multi-layer flow channel, further saving space.

[0078] For example, all the protrusions 20 are stacked sequentially along the thickness direction of the plate body 10. That is, there is one first flow channel 21 and at least one third flow channel, and the first flow channel 21 and the third flow channel are stacked. As another example, some of the protrusions 20 are stacked along the thickness direction of the plate body 10. That is, there may be two or more first flow channels 21, which are arranged in the same layer; there may be at least one third flow channel, and one or more third flow channels may be stacked on some or all of the first flow channels 21. There may be two or more third flow channels, which may be stacked or arranged in the same layer.

[0079] As an example, the heat spreader 11 includes two protrusions 20, which are a first protrusion and a second protrusion, respectively. The first protrusion is disposed on the plate body 10, and the second protrusion is disposed on the first protrusion. A first flow channel 21 is formed between the first protrusion and the heat spreader 11, and a third flow channel is formed between the first protrusion and the second protrusion. The first protrusion also has at least two second connecting holes, which connect the third flow channel and the first flow channel 21. The first flow channel 21 and the third flow channel form a two-layer structure.

[0080] As another example, the heat spreader 11 includes three protrusions 20, namely a first protrusion, a second protrusion, and a third protrusion. The first protrusion is disposed on the plate body 10, the second protrusion is disposed on the first protrusion, and the third protrusion is disposed on the second protrusion. A first flow channel 21 is formed between the first protrusion and the heat spreader 11, a third flow channel is formed between the first and second protrusions, and a third flow channel is formed between the second and third protrusions. Each of the first and second protrusions has at least two second connecting holes. The second connecting holes on the first protrusion connect the third flow channel and the first flow channel 21, and the second connecting holes on the first protrusion connect two adjacent third flow channels. The first flow channel 21 and the third flow channel form a three-layer structure.

[0081] As another example, the heat spreader 11 includes three protrusions 20, namely a first protrusion, a second protrusion, and a third protrusion. The first and second protrusions are both disposed on the plate body 10, and the third protrusion is disposed on the first protrusion. A first flow channel 21 is formed between the first protrusion and the heat spreader 11, and between the second protrusion and the heat spreader 11; a third flow channel is formed between the first and third protrusions. Each first protrusion has at least two second connecting holes, which connect the first flow channel 21 and the third flow channel. The first flow channel 21 and the third flow channel form a two-layer structure.

[0082] As an example, the heat spreader 11 includes four protrusions 20, which are stacked sequentially. One of the protrusions 20 forms a first flow channel 21 with the heat spreader 11, and the four protrusions 20 form three third flow channels, which are stacked sequentially, forming a four-layer structure.

[0083] Alternatively, two of the protrusions 20 and the heat spreader 11 form two first flow channels 21, four of the protrusions 20 form two third flow channels, and the two second flow channels can be stacked in sequence to form a three-layer structure; or they can be respectively set on one of the first flow channels 21 to form a two-layer structure.

[0084] Alternatively, three of the protrusions 20 and the heat spreader 11 form three first flow channels 21, and four of the protrusions 20 form a third flow channel, which is stacked on any of the first flow channels 21, forming a two-layer structure.

[0085] Continue reading Figures 1 to 6 The protrusion 20 includes a main body 22 and a sub-body 25. The main body 22 is disposed along the edge of the plate body 10, and the sub-body 25 is disposed on the side of the main body 22 adjacent to the center of the plate body 10 to connect to the second flow channel 13. The main body 22 has a relatively long extension length, and both ends of the main body 22 and each sub-body 25 can be connected to the second flow channel 13. Furthermore, the main body 22 can also connect to each sub-body 25, thereby realizing the diversion and convergence of multiple second flow channels 13 and improving the heat dissipation effect.

[0086] like Figure 4 As shown, one end of the split body 25 is connected to the main body 22, and the centerline of the split body 25 is perpendicular to the centerline of the corresponding part of the main body 22, so as to perform flow splitting or merging. That is, the split body 25 and the main body 22 are set perpendicularly, and the split body 25 forms a branch of the main body 22. When the centerline of the main body 22 is a broken line or a curve, the centerline of the split body 25 is perpendicular to the centerline of the broken or curved segment it is in.

[0087] In some possible examples, the main body 22 includes a first segment 23 and a second segment 24. The first segment 23 extends along the length of the plate body 10; the second segment 24 is connected to the first segment 23 and extends along the width of the plate body 10. Both the first segment 23 and the second segment 24 are provided with a component 25, and the number of components 25 provided on the first segment 23 is greater than the number of components 25 provided on the second segment 24.

[0088] The first segment 23 and the second segment 24 are arranged perpendicularly. The first segment 23 is longer, and the number of corresponding sub-segments 25 is also greater; the second segment 24 is shorter, and the number of corresponding sub-segments 25 is smaller. The multiple sub-segments 25 are evenly arranged along the extension direction of the main body 22, and can be connected to multiple spaced-apart second flow channels 13, improving the temperature uniformity of the heat exchange plate 11 and thus enhancing the heat exchange effect. The ends of the first segment 23 and the second segment 24 that are far apart from each other, and each sub-segment 25, can be connected to an independent second flow channel 13. For example, multiple first connecting holes 14 on the heat exchange plate 11 are respectively opposite to the ends of the first segment 23 and the second segment 24 that are far apart from each other, and to each sub-segment 25. The first segment 23, the second segment 24, and each sub-segment 25 can be flexibly arranged according to heat exchange requirements; this embodiment is not limited in this respect.

[0089] The heat exchanger also includes a connector 30, which is located on the side of the heat exchange plate 11 opposite to the flow channel plate 12 and communicates with the second flow channel 13. The connector 30 can be welded to the heat exchange plate 11 and communicate with the second flow channel 13. For example, the heat exchange plate 11 may have a corresponding third connecting hole that communicates with the second flow channel 13, thus enabling communication between the connector 30 and the second flow channel 13. The connector 30 is connected to a thermal management system. By controlling the connector 30 through the thermal management system, the flow rate within the second flow channel 13 can be precisely adjusted to meet heat exchange requirements. The number and location of the connectors 30 can be selected as needed and are not limited here.

[0090] The heat spreader 11 provided in this application includes a plate body 10 and a protrusion 20. The protrusion 20 is disposed on one side of the plate body 10 and integrally formed with the plate body 10. The protrusion 20 and the plate body 10 are formed in one step through a single manufacturing process, without the need for secondary processing such as welding, which can reduce assembly and improve structural strength and precision. The first flow channel 21 between the protrusion 20 and the plate body 10 can be narrower, eliminating the need for any adjustment or avoidance of the tray or battery pack, improving the space utilization of the battery pack, and achieving tray standardization.

[0091] The embodiments or implementation methods described in this specification are presented in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat exchange device, characterized in that, include: Board body(10); A protrusion (20) is provided on one side of the plate body (10) and integrally formed with the plate body (10). A first flow channel (21) is formed between the protrusion (20) and the plate body (10).

2. The heat exchange device according to claim 1, characterized in that, The plate body (10) and the protrusion (20) are formed by superplastic forming process and / or diffusion bonding process.

3. The heat exchange device according to claim 1, characterized in that, The plate body (10) includes a stacked heat spreader plate (11) and a flow channel plate (12). The protrusion (20) is disposed on the side of the heat spreader plate (11) away from the flow channel plate (12) and is integrally formed with the heat spreader plate (11).

4. The heat exchange device according to claim 3, characterized in that, A second flow channel (13) is formed between the heat spreader (11) and the flow channel plate (12), and the second flow channel (13) is connected to the first flow channel (21).

5. The heat exchange device according to claim 4, characterized in that, The heat spreader (11) is provided with at least two first connecting holes (14), which connect the second flow channel (13) and the first flow channel (21).

6. The heat exchange device according to claim 5, characterized in that, Along the extension direction of the first flow channel (21), the at least two first connecting holes (14) are arranged in sequence.

7. The heat exchange device according to claim 3, characterized in that, A second flow channel (13) is formed between the heat spreader (11) and the flow channel plate (12), and the second flow channel (13) is independent of the first flow channel (21).

8. The heat exchange device according to any one of claims 4-7, characterized in that, The heat exchange device also includes a connector (30), which is located on the side of the heat exchange plate (11) away from the flow channel plate (12) and is connected to the second flow channel (13).

9. The heat exchange device according to any one of claims 1-6, characterized in that, The thickness of the protrusions (20) is the same.

10. The heat exchange device according to any one of claims 1-6, characterized in that, Along a direction perpendicular to the thickness direction of the plate body (10) and perpendicular to the extension direction of the first flow channel (21), the width of the first flow channel (21) is 3-8 mm.

11. The heat exchange device according to any one of claims 1-6, characterized in that, The plate body (10) has a first region and a second region surrounding the first region; The first region of the plate body (10) is configured to contact the battery cell, and the second region of the plate body (10) is provided with the protrusion (20).

12. The heat exchange device according to claim 11, characterized in that, The protrusion (20) includes: The main body (22) extends along the edge of the plate body (10); The split part (25) is located on one side of the main body (22) near the center of the plate body (10).

13. The heat exchange device according to claim 12, characterized in that, The centerline of the split part (25) is perpendicular to the centerline of the main body (22).

14. The heat exchange device according to claim 12, characterized in that, The main body (22) includes: The first segment (23) extends along the length direction of the plate body (10); The second segment (24) is connected to the first segment (23) and extends along the width direction of the plate body (10); Both the first segment (23) and the second segment (24) are provided with the sub-body (25), and the number of the sub-body (25) provided on the first segment (23) is greater than the number of the sub-body (25) provided on the second segment (24).

15. The heat exchange device according to any one of claims 1-6, characterized in that, The protrusions (20) have at least two, and at least a portion of the protrusions (20) are stacked along the thickness direction of the plate body (10), and a third flow channel is formed between two adjacent protrusions (20); In two adjacent protrusions (20) along the thickness direction of the plate body (10), the protrusion (20) closer to the plate body (10) is provided with at least two second connecting holes, which connect the first flow channel (21) and the third flow channel, or two adjacent third flow channels.

16. The heat exchange device according to any one of claims 1-6, characterized in that, The protrusion (20) is a flat, curved or wavy surface away from the top surface of the plate body (10).

17. A battery pack, characterized in that, It includes the heat exchange device according to any one of claims 1-16, and the battery cell disposed on the heat exchange device.

18. An electrical appliance, characterized in that, include: The electrical device and the battery pack of claim 17; the battery pack is electrically connected to the electrical device and is used to supply power to the electrical device.

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