Cooling plate and battery pack

Abstract

The utility model provides a cooling plate and a battery pack, which can solve the problems of insufficient pressure resistance, low heat exchange efficiency and non-uniform temperature distribution of the traditional cooling plate. The cooling plate comprises a cooling plate body, inclined ribs and a turbulent flow structure, the cooling plate body is enclosed into a flow channel cavity by parallel heat exchange plates and side plates, the inclined ribs are obliquely connected with the heat exchange plates to separate flow channels, the compression resistance is enhanced through the mechanical decomposition effect, and meanwhile, the heat exchange area is increased; the turbulent flow structures comprise protruding parts and rough surfaces, are distributed on the surfaces of the inclined ribs and the inner walls of the heat exchange plates, damage laminar flow of cooling liquid and excite turbulent flow to improve the heat exchange efficiency, the distribution density is adjusted according to differentiation of regional heat dissipation requirements, uniform control over the temperature of the battery pack is achieved, and the protruding structures can provide support to prevent a flow channel from being closed at the compression limit of the cold plate. The cooling plate can be designed into a straight surface type or bent flat tube, is suitable for a cylindrical battery module, has the advantages of high pressure resistance, efficient heat dissipation and temperature equalization, and ensures the safety and reliability of battery thermal management.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a cooling plate and a battery pack. Background Technology

[0002] With the rapid development of electric vehicles, battery cooling technology has received increasing attention. During normal operation, batteries heat up. When the internal temperature rises, the electrode materials and electrolyte undergo volume changes or generate gas. Due to the limitations of the sealed structure, the internal pressure cannot be released in time and can only be relieved by the overall expansion of the battery. After expansion, the gap between batteries decreases, causing the cooling plate between them to be compressed. As the battery expansion increases, the cooling plate may deform entirely. Depending on the cooling area, battery cooling is divided into top cooling, bottom cooling, and side cooling. Deformation of the cooling plate under stress is particularly noticeable in side cooling. If the cooling plate material is too soft or the design strength is insufficient, for example, in some extreme high-temperature environments, the cooling plate may bend or twist from its original flat shape due to battery expansion, resulting in a large gap with the side of the battery, affecting its fit and thus reducing heat exchange efficiency. Traditional cooling plates struggle to balance pressure resistance, heat exchange efficiency, and temperature uniformity, affecting the lifespan of both the cooling plate and the battery. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a cooling plate that can adapt to deformation under the external force of battery expansion, and can effectively increase heat exchange efficiency and improve temperature uniformity.

[0004] To achieve the above and other related objectives, this utility model provides a cooling plate, comprising:

[0005] The cold plate body includes two parallel heat exchange plates. The two ends of the heat exchange plates are connected by side plates to form a flow channel cavity for the flow of heat exchange medium and heat exchange with the outside.

[0006] The inclined ribs are connected to the two heat exchange plates at their two ends respectively. The multiple inclined ribs are arranged at an angle relative to the heat exchange plates to divide the flow channel cavity into multiple flow channels.

[0007] A turbulence-disrupting structure is provided on the surface of the inclined ribs and the inner wall of the heat exchange plate.

[0008] In an optional embodiment of this utility model, the inclined ribs include multiple sets of parallel ribs, which are uniformly arranged along the width direction of the heat exchange plate.

[0009] In an optional embodiment of the present invention, the turbulence structure includes protrusions that are discretely distributed on the surface of the inclined ribs and the inner wall of the heat exchange plate.

[0010] In an optional embodiment of this utility model, the cross-sectional shape of the protrusion is polygonal and / or arc-shaped.

[0011] In an optional embodiment of this utility model, the distribution density of the protrusions in at least some of the flow channels is different from the distribution density of the protrusions in other flow channels.

[0012] In an optional embodiment of the present invention, the turbulence structure further includes a groove-like or sawtooth-like rough surface, which is formed on the inner wall of the cold plate body by an extrusion mold.

[0013] In an optional embodiment of this utility model, the cold plate body is a straight flat tube or a curved flat tube.

[0014] This utility model also proposes a battery pack, which includes a battery module and the aforementioned cooling plate, wherein the cooling plate is attached to the surface of the battery module for heat exchange.

[0015] In an optional embodiment of this utility model, the battery module is a square battery module, and the cooling plate is a flat tube with a straight surface.

[0016] In an optional embodiment of this utility model, the battery module is a cylindrical battery module, and the cooling plate is a curved flat tube.

[0017] The technical advantages of this invention are as follows: by using inclined ribs to decompose pressure, the compressive strength of the cooling plate is improved, and the deformation under stress is ensured to be uniform; the turbulent heat transfer is enhanced by the turbulent structure, thereby improving the heat transfer efficiency; and the temperature uniformity is achieved through the differentiated layout of the turbulent structure. At the same time, the inclined structure of the ribs can also increase the heat transfer area and improve the heat transfer effect. The turbulent structure on the inner wall of the heat exchange plate can support the cooling plate when it is compressed to the limit position to prevent the flow channel from closing and ensure the normal function of heat transfer. The overall design of the cooling plate has the advantages of good compressive deformation resistance, efficient heat dissipation and temperature uniformity, ensuring the safety and reliability of battery thermal management and improving the service life of the battery pack. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of the cooling plate in an optional embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall structure of a straight-faced flat tube as an optional embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the overall structure of a curved flat tube as the cooling plate in another optional embodiment of the present invention;

[0022] Figure 4 This is a partial structural diagram of the cooling plate in an optional embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the side plate of the cooling plate having a folded shape in an optional embodiment of the present invention;

[0024] Figure 6 This is a partial structural diagram of the cooling plate when the cross-section of the turbulence structure is rectangular in one optional embodiment of the present invention;

[0025] Figure 7 for Figure 6 A magnified view of a local structure of the turbulence structure in the image;

[0026] Figure 8 This is a partial structural diagram of the cooling plate when the cross-section of the turbulence structure is arc-shaped in an optional embodiment of the present invention;

[0027] Figure 9 for Figure 8 A magnified view of a local structure of the turbulence structure in the image;

[0028] Figure 10 This is a partial structural diagram of the cooling plate in an optional embodiment of the present invention, where the turbulence structure is a rough surface;

[0029] Figure 11 for Figure 10 A magnified view of the local structure of the rough surface in the image;

[0030] Figure 12 This is a partial structural diagram of the cooling plate in an optional embodiment of the present invention;

[0031] Figure 13 This is a schematic diagram of the cooling plate under extreme deformation, shown in CAE simulation software in an optional embodiment of the present invention.

[0032] Label Explanation:

[0033] 100. Cold-rolled plate body; 200. Diagonal ribs; 300. Fluid spoiler structure;

[0034] 110. Heat exchange plate; 120. Side plate; 310. Protrusion; 320. Rough surface. Detailed Implementation

[0035] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0036] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0037] During battery operation, a cooling plate is typically used for heat exchange and cooling. When the battery expands, it will compress the cooling plate. If the cooling plate has poor compressibility, the force between it and the battery will damage the battery and seriously affect its lifespan. If the cooling plate is not designed properly, it will bend or twist under external force, creating a large gap between it and the battery, which will seriously affect the heat exchange efficiency and also affect the battery's lifespan.

[0038] Please see Figures 1 to 13 This invention proposes a cooling plate, comprising a cooling plate body 100, inclined ribs 200, and a turbulence-inducing structure 300. The cooling plate body 100 is a flat tube structure with a flow channel cavity formed inside. The heat exchange medium flows within the flow channel cavity. When the cooling plate body 100 is in contact with the battery surface, heat exchange is achieved through the flow of the heat exchange medium. The inclined ribs 200 are disposed within the flow channel cavity, dividing the flow channel cavity into multiple flow channels. The heat exchange medium flows uniformly within each flow channel. The decomposition effect of the inclined ribs 200 enhances the resistance to compressive deformation, while the inclined arrangement of the inclined ribs 200 increases the heat exchange area. The turbulence-inducing structure 300 is distributed on the surface of the inclined ribs 200 and the inner wall of the cooling plate body 100. It improves heat exchange efficiency by increasing the heat exchange area, disrupting the laminar flow state of the fluid, and inducing turbulence. It is also arranged differently according to heat dissipation requirements to balance the temperature. When the cooling plate body 100 is compressed to its limit position, the turbulence-inducing structure 300 can also provide support to prevent the flow channel from closing, ensuring normal heat exchange function.

[0039] Specifically, when the battery expands, the compressive force on the cold plate body 100 is decomposed under the action of the inclined ribs 200, resulting in uniform stress and deformation of the cold plate body 100 as a whole. This reduces the risk of local deformation or damage to the flat tube during compression and avoids large gaps between the flat tube and the battery due to abnormal deformation, which would affect the heat exchange effect. The turbulence structure 300 on the surface of the inclined ribs 200 and the inner wall of the cold plate can disrupt the laminar flow state of the heat exchange medium in the flow channel, causing the fluid to change from laminar flow to turbulent flow, thus enhancing the heat transfer efficiency. The turbulence structure 300 can also disrupt the stable structure of the thermal boundary layer, making it easier for heat to be transferred from the battery to the heat exchange medium in the cold plate body 100, reducing thermal resistance and improving heat dissipation efficiency. By reasonably setting the turbulence structure 300 at different locations according to the heat generation of different areas of the battery, the temperature uniformity can be improved, avoiding local overheating and other phenomena, improving the thermal stability of components such as the battery pack, extending their service life, and ensuring the safety and reliability of new energy vehicles.

[0040] It should be noted that when the cooling plate is attached to the battery surface, heat exchange occurs through the internal flow channel and the flow of the heat exchange medium, thereby exchanging heat with the battery. In different working scenarios, this heat exchange process can be a cooling process or a heating process. Similarly, the cooling plate can also be used for a variety of other devices that require heat exchange. The flow channels and turbulence structure 300 inside the cooling plate can be reasonably set according to the heat exchange requirements.

[0041] Please see Figures 1 to 5 In an optional embodiment of this utility model, the cold plate body 100 includes a heat exchange plate 110 and a side plate 120. The two heat exchange plates 110 are arranged in parallel and connected at both ends by the side plate 120 to form a flow channel cavity for the flow of heat exchange medium and heat exchange with the outside. The cold plate body 100 can adapt to the heat dissipation requirements of various battery modules. For example, the cold plate body 100 can be a straight flat tube, which can adapt to the heat exchange requirements of square battery modules. For square batteries, the straight flat tube is arranged close to the battery plane to ensure large-area uniform heat exchange. The cold plate body 100 can also be a curved flat tube, which can adapt to the heat exchange requirements of cylindrical battery modules. For cylindrical batteries, the curved flat tube is arranged along the outline of the battery array to make full use of space and be close to the heat source. The cold plate body 100 can be tightly bonded to the battery surface by thermally conductive adhesive or mechanical clips to improve heat conduction efficiency.

[0042] Please see Figures 1 to 5In an optional embodiment of this utility model, the two ends of the heat exchange plate 110 can be connected by an arc-shaped side plate 120 or a side plate 120 with a folded shape. The side plate 120 with a folded shape further improves the compressibility of the cold plate. Its angle can match the angle of the diagonal rib 200. The cold plate is easy to compress and the deformation is more uniform. The folded corner of the side plate 120 and the connection between the side plate 120 and the heat exchange plate 110 are smoothly transitioned to avoid stress concentration.

[0043] Please see Figures 1 to 13 In an optional embodiment of this utility model, the two ends of the inclined ribs 200 are respectively connected to the heat exchange plate 110. Multiple inclined ribs 200 are arranged at an angle relative to the heat exchange plate 110, dividing the flow channel cavity into multiple flow channels. The inclined ribs 200 and the heat exchange plate 110 can be connected by welding or integral extrusion molding, for example. The inclined ribs 200 can cooperate with the heat exchange plate 110 to achieve good overall deformation of the cooling plate. Simultaneously, the inclined design of the inclined ribs 200 significantly increases the contact area with the heat exchange medium compared to vertical ribs, enhancing the heat exchange effect in the flow path direction and improving heat exchange efficiency. When the cold plate is subjected to vertical compression, the inclined ribs 200 decompose the compressive force into components along the rib length direction and the vertical direction, alleviating local stress concentration through multi-directional stress diffusion. Compared to vertical ribs, inclined ribs make the force transmission path more complex and diverse, dispersing the compressed force over a larger area, avoiding force concentration at a certain point or area, thereby enabling the flat tube to withstand greater compressive force.

[0044] Please see Figures 1 to 13 In an optional embodiment of this utility model, the inclined ribs 200 include multiple sets of parallel ribs, which are uniformly arranged along the width direction of the heat exchange plate 110. The multiple sets of parallel inclined ribs 200 are arranged at uniform intervals to ensure balanced flow in each channel. The spacing design of the inclined ribs 200 needs to ensure that there is no interference between the inclined ribs 200 and between the inclined ribs 200 and the turbulence structure 300 when the flat tube is compressed to its limit state. When the cooling plate is compressed, the multiple sets of parallel ribs disperse the compressive force, which can achieve uniform and good deformation of the cooling plate as a whole, avoid excessive local pressure, reduce the risk of local deformation or damage during compression, and improve the overall compressive deformation resistance of the cooling plate.

[0045] Please see Figures 1 to 13In one optional embodiment of this utility model, uniaxial compression is the dominant method for cooling the side of the battery pack. The use of parallel diagonal ribs 200 can uniformly disperse the expansion force, simplify processing, facilitate rib thickness control, and allow for a wide adjustable range of rib angles, thus absorbing greater tolerances and achieving better uniform deformation and heat dissipation. Combined with the turbulence structures on the diagonal ribs 200 and heat exchange plates 110, dead zones are not formed when absorbing tolerances. The overall structure is simple, smooth, and the continuous flow channel results in less pressure loss. In other embodiments, the diagonal ribs 200 may also include multiple sets of rhomboid ribs, evenly arranged within the flow channel cavity, with both ends connected to the heat exchange plates 110 on both sides. Force is transmitted through the corners of the rhomboid structure, ensuring uniform stress distribution throughout the structure.

[0046] It is understandable that cold-rolled flat tubes typically use materials such as aluminum alloys. These materials exhibit anisotropy, meaning their mechanical properties differ in different directions. Adjusting the ribs to an inclined state allows for better utilization of the material's performance advantages in different directions, enabling the material to exhibit greater strength and toughness under compressive forces. For example, aluminum alloys may have higher tensile strength in a specific inclined direction. Setting the ribs in this inclined direction allows for full utilization of this characteristic during compression. The arrangement of the inclined ribs is adapted to the aluminum alloy material structure of the heat sink, improving the flat tube's resistance to compressive deformation.

[0047] Please see Figures 1 to 13 In an optional embodiment of this utility model, the turbulence structure 300 is disposed on the surface of the inclined rib 200 and the inner wall of the heat exchange plate 110. Specifically, it is staggered on the inner walls of the two heat exchange plates 110, and staggered on both sides of each inclined rib 200 to cooperate with the overall compression deformation of the cooling plate. Utilizing its turbulence characteristics, heat exchange efficiency is improved. The turbulence structure 300 is rationally designed according to the heat exchange requirements of different parts to ensure temperature uniformity. The turbulence structure 300 on the inner wall of the heat exchange plate 110 can also provide support to prevent flow channel closure when the cold plate is compressed to its limit. In the cross-section of the cold plate, the turbulence structure 300 can generate turbulence in the heat exchange medium, such as coolant, increasing the contact frequency and time between the coolant and the inner wall of the flat tube and the heat-generating components, enhancing convective heat transfer, and removing more heat. The turbulence structure 300 guides the coolant flow to the key parts that need heat dissipation, making the flow distribution more reasonable and ensuring that each area is adequately cooled. In some cases, a well-designed turbulence point can also break the boundary layer separation, reduce the generation of eddies and backflow, thereby reducing flow resistance, improving the flow efficiency of the coolant, and reducing system energy consumption.

[0048] Please see Figures 1 to 13In an optional embodiment of this utility model, the turbulence structure 300 includes protrusions 310, which are discretely distributed on the surface of the inclined ribs 200 and the inner wall of the heat exchange plate 110. The distribution of turbulence points can improve the heat transfer capacity of the cold plate. According to the Reynolds number principle, when the fluid flow is in turbulent flow, its heat transfer coefficient will be greatly improved. When coolant flows within the flow channel, the presence of turbulence points disrupts the laminar flow state, generating more eddies and mixing during the flow process. This causes the fluid to transition from laminar to turbulent flow. Compared to laminar flow, heat can be rapidly diffused throughout the entire fluid domain through forced convection in turbulent flow. The heat transfer coefficient between the coolant and the cooling plate wall is higher, allowing for more effective heat removal and significantly enhancing heat transfer efficiency. Turbulence points not only make the flow path of the coolant within the liquid cooling plate more complex and tortuous but also increase the contact area between the coolant and the liquid cooling plate wall, as well as the cooled components, enabling more effective heat absorption and removal, thus improving heat dissipation efficiency. Furthermore, the fluid near the cooling plate wall typically forms a thermal boundary layer with a large temperature gradient, which hinders heat transfer. Turbulence points disrupt the stable structure of the thermal boundary layer, thinning it and making it easier for heat to be transferred from the cooled object to the coolant, reducing thermal resistance and improving heat dissipation. In one specific embodiment, by providing inclined ribs 200 and protrusions 310 inside the cold plate, the heat exchange efficiency between the coolant and the cold plate can be increased by 15%-25%.

[0049] Please see Figures 1 to 13 In an optional embodiment of this utility model, multiple protrusions 310 are discretely distributed on the walls of each flow channel of the heat exchange plate 110 according to the compression deformation requirements and heat exchange needs. The protrusions 310 on the inner wall of the heat exchange plate 110 cooperate with the inclined ribs 200 to avoid interference with the deformation of the inclined ribs 200 and the compression of the cooling plate. At the same time, the inner wall of the heat exchange plate 110 can be supported when the flat tube is compressed to prevent the flow channel from closing, thus ensuring the normal heat exchange function of the cooling plate when compressed to the limit.

[0050] Please see Figures 1 to 13 In an optional embodiment of this utility model, the cross-sectional shape of the protrusion 310 is polygonal and / or arc-shaped, both of which can achieve effective turbulence. It is discretely distributed on the surface of the inclined rib 200 and the inner wall of the heat exchange plate 110, thereby increasing the fluid turbulence and destroying the thermal boundary layer, thus promoting turbulent heat transfer.

[0051] Please see Figures 10 to 11In an optional embodiment of this utility model, the turbulence structure 300 further includes a grooved or sawtooth-shaped rough surface 320. The rough surface 320 is formed on the inner wall of the cold plate body 100 by an extrusion die, further disrupting the laminar flow state and expanding the heat exchange area. The rough surface 320 is used in combination with the protruding structure, wherein the protruding structure can also act as a support point to prevent the flow channel from closing when the cold plate is compressed to its limit, taking into account both the pressure resistance deformation and heat exchange requirements. The protruding structure and the inclined rib 200 are designed in coordination to ensure good compression capacity and heat exchange efficiency of the cooling plate; the rough surface 320 partially assists in improving heat exchange efficiency without affecting the compression deformation of the cooling plate. Specifically, by adjusting the surface roughness of the extrusion die cavity, the smooth inner wall of the flat tube can be changed into a serrated or grooved cavity. This roughness includes all the paths through which the cooling medium passes. The tiny protrusions or depressions on the rough surface can also act as turbulence points, causing the coolant to generate eddies and turbulence during flow, disrupting the fluid boundary layer, thereby enhancing the heat transfer effect. These protrusions or depressions can be regular shapes, such as circles or squares, or they can be irregular shapes.

[0052] Please see Figures 1 to 13 In an optional embodiment of this utility model, the distribution density of protrusions 310 in at least some flow channels is different from the distribution density of protrusions 310 in other flow channels. The size and number of protrusions 310 in each flow channel are determined according to the design of the flow channel cross-section. The distribution density of turbulence points in different flow channels is reasonably set according to heat dissipation requirements, and differentiated configuration is used to control the heat dissipation efficiency of different parts and improve temperature uniformity. The heat generation of different parts of the battery pack or other heat-generating components of new energy vehicles may vary. For example, heat tends to accumulate in the center of the battery pack, while the edge parts dissipate heat relatively quickly. The distribution of turbulence points can be set according to the heat distribution of the heat-generating components, and the flow rate and flow distribution of the coolant can be reasonably adjusted so that the heat dissipation capacity of the coolant at different locations matches the heat generation at that location, thereby balancing the heat dissipation rate of different parts of the battery pack and reducing the temperature difference inside the battery pack. Specifically, for example, the density of protrusions can be increased in areas with high heat dissipation requirements, such as the area corresponding to the center of the battery module, while they can be sparsely arranged in areas with low heat load to achieve temperature balance.

[0053] It is understandable that uneven coolant flow within the liquid cooling plate can lead to insufficient coolant flow in certain areas, resulting in localized overheating. Properly positioned turbulence points can optimize coolant flow distribution, ensuring adequate cooling in all areas, preventing localized overheating, improving the thermal stability of components such as battery packs, extending their lifespan, and ensuring the safety and reliability of new energy vehicles.

[0054] Please see Figures 1 to 13In an optional embodiment of this utility model, to ensure good compression deformation and high heat transfer rate of the cooling plate, its structural dimensions need to be reasonably designed. Specifically, for example, the thickness T of the heat exchange plate 110 is set to 0.3-0.8 mm, the included angle θ between the inclined rib 200 and the heat exchange plate 110 is 25°-65°, the thickness t of the inclined rib 200 is t = T * 60%, and protrusions or depressions are provided along the path of the heat exchange medium. The cold plate structure within this size range has the characteristics of deformability, high heat transfer rate, and high temperature uniformity. The width of the flow channel cavity can be designed according to the cooling medium flow requirements to ensure heat transfer while reducing the overall weight of the cold plate, and can absorb battery expansion or external impact loads through elastic deformation to avoid structural failure. In addition, the size of the protrusion 310 also affects the deformation effect and heat transfer rate. The larger the size, the higher the heat transfer efficiency, but the deformation efficiency will decrease. Under the premise of the above size range, the size of the protrusion 310 and the specific size of the heat exchange plate 110 and the inclined rib 200 can be adjusted and determined according to the actual working conditions.

[0055] Please see Figure 13 In an optional embodiment of this utility model, the 3D data of the structure with the inclined ribs 200 and the protrusions 310 are input into CAE simulation software for analysis, which can fully demonstrate the extreme deformation state of the cooling plate when the structure is subjected to external force. It can be seen that when the cooling plate is compressed to the extreme position, the protrusions on the inner wall of the heat exchange plate 110 act as supports to prevent the flow channel from closing, and effective heat exchange can still be achieved. Moreover, the protrusion structure on the inner wall of the heat exchange plate 110 will not interfere with the inclined ribs 200 on both sides. The inclined ribs 200 can adapt to the cold plate to achieve good deformation. This structural design can not only meet the deformation characteristics, but also meet the requirements of improving heat exchange and temperature uniformity.

[0056] Please see Figures 1 to 13 This utility model also proposes a battery pack, which includes a battery module and a cooling plate as described in the above embodiments. The cooling plate is attached to the surface of the battery module for heat exchange. The cooling plate can adapt to the heat dissipation requirements of various battery modules, and it can be tightly bonded to the surface of the battery module through thermally conductive adhesive or mechanical clips to improve heat conduction efficiency.

[0057] Please see Figures 1 to 13 In one optional embodiment of this utility model, the battery module is a square battery module, and the cooling plate is a straight flat tube. The straight flat tube is arranged to fit the plane of the square battery, ensuring uniform heat exchange over a large area. In another optional embodiment, the battery module can also be a cylindrical battery module, and the corresponding cooling plate is a curved flat tube. The curved flat tube is arranged along the array contour of the cylindrical battery, making full use of space and close to the heat source.

[0058] Please see Figures 1 to 13In an optional embodiment of this utility model, when the cooling plate is working, the heat exchange medium (such as coolant) enters the flow channel cavity from the cold plate inlet and flows through the multiple flow channels formed by the inclined ribs 200. The inclined path of the inclined ribs 200 prolongs the contact time between the fluid and the cooling plate. At the same time, the turbulence structure 300 induces the fluid to be continuously disturbed and mixed, transforming laminar flow into turbulent flow, which significantly improves the heat exchange efficiency. When the cold plate is compressed by external force, the inclined ribs 200 disperse the vertical pressure to a larger area through the inclined angle, reducing the risk of local deformation. Meanwhile, the inner wall protrusion supports the flow channel under extreme compression to prevent closure, ensuring that the coolant continues to flow and dissipate heat.

[0059] In summary, the cooling plate structure of this utility model achieves a balance between compressive deformation resistance and heat exchange efficiency through the coordinated design of the inclined ribs 200 and the turbulence structure 300. The inclined ribs 200 decompose the pressure, and the protrusions 310 prevent the flow channels from closing, thus achieving good heat exchange function even after the cooling plate is compressed. The setting of the inclined ribs 200 and the turbulence structure 300 improves the heat exchange efficiency, and the differential distribution of the turbulence structure 300 matches the heat dissipation requirements of different areas, which can reduce the temperature difference of the battery pack. The cooling plate structure has strong adaptability, with straight and curved flat tubes covering various battery shapes, and has a wide range of applications, ensuring the thermal safety and long-life operation of the battery pack under high energy density conditions.

[0060] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0061] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0062] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0063] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0064] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0065] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0066] The above description of the embodiments shown in this utility model (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the utility model.

[0067] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0068] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. A cooling plate, characterized in that, include: The cold plate body includes two parallel heat exchange plates. The two ends of the heat exchange plates are connected by side plates to form a flow channel cavity for the flow of heat exchange medium and heat exchange with the outside. The inclined ribs are connected to the two heat exchange plates at their two ends respectively. The multiple inclined ribs are arranged at an angle relative to the heat exchange plates to divide the flow channel cavity into multiple flow channels. A turbulence-disrupting structure is provided on the surface of the inclined ribs and the inner wall of the heat exchange plate.

2. Cooling plate according to claim 1, characterized in that The inclined ribs include multiple sets of parallel ribs, which are uniformly arranged along the width direction of the heat exchange plate.

3. The cooling plate according to claim 1, characterized in that The turbulence structure includes protrusions that are discretely distributed on the surface of the inclined ribs and the inner wall of the heat exchange plate.

4. Cooling plate according to claim 3, characterized in that The cross-sectional shape of the protrusion is polygonal and / or arc-shaped.

5. The cooling plate according to claim 3, characterized in that The distribution density of the protrusions in at least some of the flow channels is different from the distribution density of the protrusions in other flow channels.

6. The cooling plate of claim 1, wherein The turbulence structure also includes a grooved or sawtooth-shaped rough surface, which is formed on the inner wall of the cold plate body by an extrusion die.

7. The cooling plate of claim 1, wherein The cold plate body is a straight flat tube or a curved flat tube.

8. A battery pack, characterized by, It includes a battery module and a cooling plate as described in any one of claims 1 to 7, wherein the cooling plate is attached to the surface of the battery module for heat exchange.

9. The battery pack of claim 8, wherein, The battery module is a square battery module, and the cooling plate is a flat tube with a straight surface.

10. The battery pack of claim 8, wherein, The battery module is a cylindrical battery module, and the cooling plate is a curved flat tube.

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