Double-conveying direct cooling plate with local heat dissipation enhancement

Abstract

The utility model discloses a double-conveying direct cooling plate with local heat dissipation enhancement, the direct cooling plate comprises a substrate and a panel, the panel is bent to form at least one groove, and the panel seals the groove to form a heat exchange runner; the bottom face of the groove is provided with a lower capillary conveying groove set consistent with the trend of the heat exchange flow channel. The panel is provided with an upper capillary conveying groove group which is consistent in trend along the runner on a part of the surface of the heat exchange runner; the lower capillary conveying groove set and the upper capillary conveying groove set are each composed of a plurality of parallel capillary conveying grooves with the depth ranging from 0.1 mm to 0.5 mm and the width ranging from 0.1 mm to 0.3 mm. The lower capillary conveying groove set and / or the upper capillary conveying groove set are / is provided with a local reinforcing area, more microchannels are formed in the reinforcing area, and the liquid storage amount is increased. According to the direct cooling plate, a micro-groove storage structure is arranged in a local area, so that the local heat exchange capability is improved, and the requirements of a battery system on safety and reliability are better met.

Description

Technical Field

[0001] The present application relates to the field of direct cooling plates, and in particular to a double-transport direct cooling plate with enhanced local heat dissipation. Background Art

[0002] With the rapid development of energy storage systems and electric vehicles, battery capacity and power continue to increase, and high-power density batteries, in particular, are becoming increasingly widely used. However, as battery performance improves, heat dissipation becomes increasingly problematic. Traditional air cooling technology, due to its limited heat dissipation capabilities, is increasingly unable to meet the efficient heat dissipation requirements of modern batteries. The main limitation of air cooling is the inability to effectively control temperature distribution, resulting in large temperature variations among individual battery cells within the battery. This not only affects battery performance, but also shortens battery life and may even pose safety risks.

[0003] To address this problem, refrigerant direct cooling plates have emerged as a new type of heat dissipation technology. Refrigerant direct cooling plates efficiently remove heat from the battery cells in the battery pack through convection heat transfer of the coolant, achieving independent temperature management of each battery cell. This design effectively reduces the overall temperature of the battery and significantly improves the temperature uniformity, thereby extending the battery life. However, conventional refrigerant direct cooling plates have gradually exposed some shortcomings in actual applications. Especially under high-load working conditions, the heat dissipation capacity of conventional refrigerant direct cooling plates is stretched, and the temperature control effect is relatively limited, making it difficult to cope with the large amount of heat generated by the battery at high power output. At the same time, in conventional designs, the flow path of the coolant is relatively fixed, and it is impossible to effectively and targetedly cool local hot spots, resulting in uneven temperature distribution.

[0004] The root cause of these shortcomings lies in the relatively simple structural design of conventional refrigerant direct cooling plates, which cannot flexibly adjust the coolant delivery path and flow distribution. Furthermore, improvements in heat dissipation efficiency often come with increased costs. Maintaining efficient heat dissipation while controlling production costs has become a pressing technical challenge for the industry. Therefore, it is particularly important to develop a new refrigerant direct cooling plate that can enhance local heat dissipation, improve temperature uniformity, and offer cost advantages. Utility Model Content

[0005] The purpose of this application is to overcome at least one of the shortcomings of the prior art and to provide a dual-transport direct cooling plate with enhanced local heat dissipation. The direct cooling plate has a micro-groove storage structure in the local area to improve the local heat exchange capacity to better meet the safety and reliability needs of the battery system.

[0006] To achieve the above-mentioned objectives, the present application discloses a dual-conveyance direct cooling plate with local heat dissipation enhancement, which includes a substrate and a panel, wherein the panel is bent to form at least one groove, and the panel seals the groove to form a heat exchange flow channel; the bottom surface of the groove is provided with a lower capillary conveying groove group consistent with the direction of the heat exchange flow channel; the panel is provided with an upper capillary conveying groove group consistent with the direction of the flow channel on a part of the surface of the heat exchange flow channel; the lower capillary conveying groove group and the upper capillary conveying groove group are both composed of a number of parallel capillary conveying grooves with a depth of 0.1-0.5 mm and a width of 0.1-0.3 mm; the lower capillary conveying groove group and / or the upper capillary conveying groove group have a local reinforcement area, which has more microchannels in the reinforcement area to increase the liquid storage capacity.

[0007] In some embodiments, the local reinforced area is staggered by capillary transport grooves, so that the local reinforced area has a plurality of liquid storage microgrooves, thereby increasing the liquid storage capacity.

[0008] In some embodiments, an auxiliary groove is further provided between the two capillary transport grooves in the local reinforced area, and the auxiliary groove is used to increase the liquid storage capacity.

[0009] In some embodiments, the cross-section of the heat exchange channel is one or more combinations of an inverted V-shape, an inverted Ω-shape, an inverted trapezoid, and a rectangle.

[0010] In some embodiments, the capillary transport grooves in the local reinforced area are deepened by 1.5 times to increase the liquid storage capacity.

[0011] In some embodiments, the capillary delivery groove of the local reinforced area is divided transversely to form a plurality of cone-shaped protrusions to increase the liquid storage capacity.

[0012] In some embodiments, the capillary delivery grooves in the local reinforced area are repeatedly bent to form zigzag grooves, thereby increasing the liquid storage capacity.

[0013] Compared with the prior art, this application has at least one of the following beneficial effects:

[0014] 1. Improve local heat dissipation performance: By providing upper and lower capillary delivery groove groups on the panel and adding more microchannels and auxiliary grooves in the local reinforced area, the storage and delivery capacity of the coolant is increased, thereby enhancing the heat dissipation effect in the local area.

[0015] 2. Improve heat exchange efficiency: The design of the capillary conveying groove can effectively expand the contact area between the coolant and the wall surface, especially in the local reinforced area. The design of the staggered groove further improves the heat transfer efficiency in the heat exchange flow channel.

[0016] 3. Optimize coolant distribution: The upper and lower capillary delivery groove groups are combined with the inverted V-shaped or inverted Ω-shaped cross-section design of the flow channel to make the coolant flow more evenly in the flow channel, effectively avoiding local excessive temperature and ensuring overall balanced heat dissipation.

[0017] The above-listed beneficial effects are not exhaustive and other potential beneficial effects and detailed technical implementations will be further disclosed in the examples or other description sections of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] After reading the following detailed description in conjunction with the accompanying drawings, you will better understand the various aspects of the present disclosure. The positions, sizes, and ranges of various structures shown in the drawings and the like sometimes do not represent the actual positions, sizes, and ranges. In the drawings:

[0019] Figure 1 It is a partial structural diagram of an embodiment disclosed in this application.

[0020] Figure 2 It is a structural schematic diagram of a part of the structure of an embodiment disclosed in the present application from another perspective.

[0021] Figure 3 It is a structural schematic diagram of a substrate in an embodiment disclosed in this application.

[0022] Figure 4 yes Figure 3 Enlarged view of point A.

[0023] Figure 5 It is a structural schematic diagram of a panel in an embodiment disclosed in this application.

[0024] Figure 6 This is a schematic structural diagram of a panel in a three-dimensional perspective in an embodiment disclosed in this application.

[0025] Figure 7 yes Figure 6 Enlarged view of point B in .

[0026] Figure 8 This is an enlarged view of the local reinforcement area of ​​another structure. DETAILED DESCRIPTION

[0027] The present disclosure will be described below with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the present disclosure more complete and fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide many additional embodiments.

[0028] It should be understood that like reference numerals refer to like elements throughout the drawings. In the drawings, the dimensions of some features may be distorted for clarity.

[0029] It should be understood that the terms used in this specification are intended only to describe specific embodiments and are not intended to limit the present disclosure. All terms (including technical and scientific terms) used in this specification have the meanings commonly understood by those skilled in the art, unless otherwise defined. For the sake of brevity and / or clarity, technologies, methods, and devices known to those skilled in the relevant art may not be discussed in detail; however, where appropriate, such technologies, methods, and devices should be considered part of this specification.

[0030] As used in this specification, the singular forms "a," "an," "said," and "the" include the plural forms unless otherwise expressly stated. The terms "include," "comprise," and "contain" as used in this specification indicate the presence of the claimed features, but do not exclude the presence of one or more additional features. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items. Example

[0031] like Figure 1-6 As shown, this embodiment provides a dual-feed direct cooling plate with enhanced local heat dissipation. The direct cooling plate's basic structure comprises a base plate 1 and a face plate 2. The face plate 2 is bent to form at least one groove 3. This groove 3 is sealed by the base plate 1, forming a heat exchange channel 4 for the flow of coolant. To enhance heat dissipation, upper and lower capillary feed groove groups 5 and 6 are provided within the heat exchange channel 4.

[0032] The cross-section of the heat exchange channel 4 can be designed as one or more combinations of an inverted V-shape, an inverted Ω-shape, an inverted trapezoid, or a rectangle to accommodate different heat dissipation requirements. This variety of channel shapes allows the coolant to maintain a stable flow at varying flow rates, preventing heat accumulation caused by localized low flow rates.

[0033] Among them, the lower capillary conveying groove group 6 is arranged on the bottom surface of the groove 3, consistent with the direction of the heat exchange flow channel 4, ensuring that the coolant flows smoothly in the heat exchange flow channel 4 and increasing the contact area with the flow channel wall.

[0034] The upper capillary conveying groove group 5 is located on a portion of the surface of the panel 2 and is also aligned with the heat exchange flow channel 4 , that is, it is arranged vertically and parallel to the lower capillary conveying groove group 6 .

[0035] The structures of the upper and lower capillary conveying groove groups 5 and 6 are basically similar. Figure 4 Taking the capillary conveying groove group 5 as an example, each is structurally composed of a plurality of parallel capillary conveying grooves 7, each having a depth of 0.1-0.5 mm and a width of 0.1-0.3 mm. This micro-groove design ensures the capillary conveying effect, achieving wall conveying in addition to flow channel conveying, i.e., dual conveying as described in this application.

[0036] It should be understood that the capillary delivery groove 7 in this embodiment utilizes the physical phenomenon of capillary effect to ensure uniform and continuous flow of coolant along the channel wall. The core of the capillary delivery principle is that when liquid passes through a small channel, the surface tension between the liquid and the solid wall allows the liquid to overcome gravity and flow freely along the wall.

[0037] It's also important to understand that the direct cooling plate uses refrigerant as its working medium and is suitable for a variety of refrigerant types, such as R134a and R1234yf. These refrigerants have high heat capacity and low viscosity, allowing them to flow quickly within the flow channel and effectively absorb the heat generated by the battery. As the refrigerant passes through the heat exchange flow channel 4, it can achieve uniform flow within the capillary conveying groove 7. Even if it encounters a hot area and causes localized vaporization, the capillary conveying groove 7 ensures that the refrigerant continues to flow along the wall, effectively preventing the formation of gas plugs.

[0038] In the above content, it should be noted that the reason for the occurrence of air plugs is that when refrigerants such as R134a or R1234yf encounter high temperatures, they may partially vaporize and form bubbles. In traditional designs, vaporization easily causes the flow channel to be blocked by bubbles, forming air plugs, which hinder the normal circulation of the refrigerant. However, in this embodiment, the design of the capillary conveying groove 7 enables the refrigerant to maintain a certain fluidity on the wall surface. Even if bubbles appear, the refrigerant can still flow along the wall surface of the heat exchange flow channel 4 through the surface tension effect of the capillary conveying groove 7, avoiding the accumulation of bubbles or blocking the normal circulation of the refrigerant. The rapid fluidity of the refrigerant and the guiding effect of the capillary groove ensure that the cooling system can maintain stable operation even in a high temperature environment. Therefore, the design of the capillary conveying groove 7 makes full use of the physical properties of the refrigerant, and ensures that the coolant can flow smoothly even when vaporized through the capillary effect of the wall, maintaining the efficient operation of the cooling system.

[0039] In this embodiment, as one of its key technical features, the design of the lower capillary delivery groove group 6 not only considers heat dissipation efficiency but also addresses the need for localized heat dissipation enhancement. Specifically, in areas with higher localized heat dissipation requirements, localized reinforcement zones 8 are provided. By adding more microgrooves, these localized reinforcement zones 8 significantly increase coolant storage capacity. The design of these areas features a higher channel density of capillary delivery grooves 7, enhancing coolant storage and flow.

[0040] Specifically, such as Figure 7 As shown, in some embodiments, the capillary delivery grooves 7 in the locally reinforced areas 8 are designed in a staggered arrangement. This staggered arrangement further increases the coolant flow path, thereby increasing the liquid storage capacity. This design ensures that heat is quickly removed from critical areas during battery pack operation, especially under high load conditions, to prevent local overheating.

[0041] In other embodiments, Figure 8 As shown, the local reinforcement area 8 can further increase the liquid storage capacity by providing auxiliary grooves 9 between the capillary grooves. The auxiliary grooves 9 increase the liquid storage space through subtle design, which is particularly suitable for local areas with high heat exchange requirements.

[0042] In addition, in other cases, as an implementation scheme, the capillary delivery groove 7 of the local reinforcement area 8 can be designed to be a structure that is 1.5 times deeper. This deepening design significantly improves the liquid storage capacity, making the coolant more abundant in the flow channel, and meeting the heat dissipation requirements of the high-power battery system.

[0043] It should also be noted that, as an embodiment, the design of the local reinforced region 8 can be further optimized based on specific needs. For example, the capillary delivery groove 7 can be transversely divided to form a plurality of conical protrusions. This design can increase the storage capacity of the coolant while increasing the complexity of the flow path, ensuring more complete coolant flow within the channel and preventing local overheating.

[0044] In another embodiment, the capillary delivery grooves 7 in the locally reinforced region 8 employ a zigzag design, further extending the coolant flow path through repeated bends. This structure not only enhances heat dissipation but also prevents the formation of air locks, ensuring that the coolant maintains good fluidity within complex flow channel structures.

[0045] To better explain the design of the local reinforced area 8 in this embodiment, in the usage scenario. This direct cooling plate is mainly used in the thermal management system of high-energy-density battery packs or power battery packs. These systems generate a lot of heat when running for a long time and working under high load. The design of the local reinforced area is specifically targeted at the high heat dissipation requirements of certain specific areas within the battery pack, such as the center area or hot spots of the battery pack. These areas usually generate higher temperatures than other parts due to the dense arrangement of batteries or concentrated loads.

[0046] In actual use, when the battery pack is under continuous high-load operation, refrigerant flows along the heat exchange channel, removing heat generated by the batteries. Standard capillary delivery channels 7 effectively transport coolant, but in hot spots, standard channels may not be sufficient to quickly dissipate heat. This is where the localized reinforcement zones 8 come into play. By enhancing the refrigerant storage and flow capacity in these critical areas, these areas can be adequately cooled even under extremely high cooling demands.

[0047] For example, in the center of the battery pack, where heat is concentrated, the design of the localized reinforced area 8 ensures better distribution and flow of the coolant in this area by deepening the capillary channels or staggering the channels. The zigzag-shaped channels or the tapered protrusions formed by transverse segmentation further increase the coolant contact area and extend the flow path. This not only improves local heat exchange efficiency but also avoids sudden temperature rises caused by insufficient local cooling.

[0048] Through this specific scenario description, it can be seen that the local reinforced area 8 can effectively meet the local heat dissipation needs of the battery pack under high load and high temperature fluctuation environments, ensuring the safety and stability of the battery pack under complex working conditions.

[0049] Overall, the direct cooling plate in this embodiment significantly improves heat exchange efficiency through the combination of carefully designed capillary conveying grooves 7 and locally reinforced areas 8. This effectively addresses the problem of uneven localized heat dissipation in high-energy-density battery systems, ensuring the safety of the equipment under long-term, high-load operation. The refined design of the convection channels and grooves not only enhances heat dissipation but also reduces production complexity and costs, making it suitable for large-scale industrial applications.

[0050] Although exemplary embodiments of the present disclosure have been described, it will be understood by those skilled in the art that various changes and modifications may be made to the exemplary embodiments of the present disclosure without departing substantially from the spirit and scope of the present disclosure. Therefore, all such changes and modifications are intended to be within the scope of protection of the present disclosure as defined by the appended claims. The present disclosure is defined by the appended claims, and equivalents of these claims are intended to be included therein.

Claims

1. A double-conveying direct cooling plate with local heat dissipation enhancement, characterized in that: The direct cooling plate includes: a base plate and a panel, wherein the panel is bent to form at least one groove, and the panel seals the groove to form a heat exchange flow channel; the bottom surface of the groove is provided with a lower capillary conveying groove group that is consistent with the direction of the heat exchange flow channel; the panel is provided with an upper capillary conveying groove group that is consistent with the direction of the flow channel on part of the surface of the heat exchange flow channel; the lower capillary conveying groove group and the upper capillary conveying groove group are both composed of a plurality of parallel capillary conveying grooves with a depth of 0.1-0.5 mm and a width of 0.1-0.3 mm; the lower capillary conveying groove group and / or the upper capillary conveying groove group have a local reinforced area with more microchannels in the reinforced area to increase the liquid storage capacity.

2. A dual-conveying direct cooling plate with enhanced local heat dissipation as claimed in claim 1, characterized in that: The local reinforced area is staggered by capillary conveying grooves, so that the local reinforced area has a plurality of liquid storage micro grooves, thereby increasing the liquid storage capacity.

3. A dual-conveying direct cooling plate with enhanced local heat dissipation as claimed in claim 1, characterized in that: An auxiliary groove is further provided between the two capillary conveying grooves in the local reinforcement area, and the auxiliary groove is utilized to increase the liquid storage capacity.

4. A dual-conveying direct cooling plate with enhanced local heat dissipation as claimed in claim 1, characterized in that: The cross section of the heat exchange channel is one or more combinations of an inverted V shape, an inverted Ω shape, an inverted trapezoid, and a rectangle.

5. A dual-conveying direct cooling plate with enhanced local heat dissipation as claimed in claim 1, characterized in that: The capillary conveying grooves in the local reinforced area are deepened by 1.5 times, thereby increasing the liquid storage capacity.

6. A dual-conveying direct cooling plate with enhanced local heat dissipation as claimed in claim 1, characterized in that: The capillary conveying grooves in the local reinforced area are divided transversely to form a plurality of cone-shaped protrusions, thereby increasing the liquid storage capacity.

7. A dual-conveying direct cooling plate with enhanced local heat dissipation as claimed in claim 1, characterized in that: The capillary conveying grooves in the local reinforced area are bent repeatedly to form zigzag grooves, thereby increasing the liquid storage capacity.

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