Liquid cooling plate and battery pack

Abstract

The invention provides a liquid cooling plate and a battery pack. The liquid cooling plate comprises a plate body and a supporting beam, wherein the plate body is provided with a first plate surface; the supporting beams are arranged on the first plate surface, and the total area of the supporting beams is smaller than 30% of the area of the first plate surface in the projection of the liquid cooling plate in the height direction. According to the liquid cooling plate and the battery pack, the technical problem that the anti-condensation effect of the liquid cooling plate is poor is solved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, specifically to a liquid cooling plate and a battery pack. Background Technology

[0002] In related technologies, the liquid cooling plate has multiple crossbeam sheet metal as supports along its short axis and multiple longitudinal beam sheet metal as supports along its long axis. The supports occupy a large area when supporting the liquid cooling plate, which makes the area on the liquid cooling plate that can be used to spray the anti-condensation coating small, resulting in poor anti-condensation effect of the liquid cooling plate. Summary of the Invention

[0003] The embodiments of the present invention provide a liquid cooling plate and a battery pack, which can improve the technical problem of poor anti-condensation effect of the liquid cooling plate.

[0004] In a first aspect, embodiments of the present invention provide a liquid cooling plate, comprising: A plate having a first plate surface; A support beam is provided on the first plate surface. The total area of ​​the support beam within the projection of the liquid cooling plate in the height direction is less than 30% of the area of ​​the first plate surface. This arrangement allows for more space to be reserved on the first plate surface for anti-condensation operations (such as spraying an anti-condensation coating), thereby improving the anti-condensation effect of the liquid cooling plate.

[0005] In some embodiments, the support beams include multiple beams, which are spaced apart on the first plate surface along a first direction of the plate body. This arrangement allows space to be reserved between the support beams for anti-condensation operation, improving the anti-condensation effect of the liquid cooling plate. At the same time, the spaced support beams can also provide better support for the plate body.

[0006] In some embodiments, the support beams include three beams, which are arranged along a first direction of the plate, and are sequentially a first support beam, a second support beam, and a third support beam. The second support beam extends along a second direction perpendicular to the first direction and is disposed on the first plate surface. The first support beam and the third support beam are symmetrically disposed on both sides of the first support beam. This arrangement allows the first support beam, the second support beam, and the third support beam to provide stable support for the plate body, thereby improving the reliability of the liquid cooling plate.

[0007] In some embodiments, along the second direction, the lengths of both the first support beam and the third support beam are less than the length of the second support beam; this arrangement allows for more space to be reserved on the first plate surface for anti-condensation operations, thereby enhancing the anti-condensation effect of the liquid cooling plate.

[0008] In some embodiments, the first support beam, the second support beam, and the third support beam all extend along the second direction; this arrangement can unify the direction of heat conduction, construct a stable frame, and improve the heat dissipation and structural stability of the liquid cooling plate.

[0009] In some embodiments, the second support beam extends along the second direction, and both the first support beam and the third support beam extend along the first direction; this arrangement can provide a multi-directional heat conduction path for the liquid cooling plate, thereby enhancing the structural deformation resistance and stability of the liquid cooling plate.

[0010] In some embodiments, along the second direction, the plate has a first end and a second end disposed opposite to each other, and a liquid cooling channel is provided in the plate, with an outlet and an inlet respectively provided at both ends of the liquid cooling channel; Both the liquid outlet and the liquid inlet are located at the first end, and the first support beam and the third support beam are arranged close to the second end. This arrangement allows the liquid cooling plate to form an efficient coolant circulation path. At the same time, the support beams can reasonably distribute the plate body and the gravity acting on the plate body, preventing the plate body from deforming.

[0011] In some embodiments, the second support beam divides the first plate surface into a first region and a second region. The liquid outlet and the first support beam are both located in the first region, and the liquid inlet and the third support beam are both located in the second region. This arrangement allows for the reasonable division of areas for the layout of the support beam, the liquid inlet, and the liquid outlet. It also helps to balance heat, disperse stress, and provide more areas for anti-condensation operations.

[0012] In some embodiments, the liquid cooling plate further includes a first anti-condensation layer and a second anti-condensation layer, which are respectively disposed on opposite sides of the second support beam along the first direction; this arrangement can prevent the formation of condensation, protect the internal components of the battery pack, and improve the reliability of the battery pack.

[0013] In some embodiments, along the second direction, the plate has a first end and a second end disposed opposite to each other, and a liquid cooling channel is provided in the plate, with an outlet and an inlet respectively provided at both ends of the liquid cooling channel; The liquid outlet is located near the first anti-condensation layer, and the liquid inlet is located near the second anti-condensation layer. This arrangement allows the coolant to enter the liquid cooling channel from the liquid inlet, flow within the liquid cooling channel, and finally flow out from the liquid outlet to the outside of the liquid cooling plate, thereby carrying away the heat on the liquid cooling plate and achieving a cooling effect.

[0014] In some embodiments, the thickness of the first anti-condensation layer is less than the thickness of the second anti-condensation layer; this configuration allows the first and second anti-condensation layers to play a better role in preventing condensation, thereby improving the anti-condensation effect of the liquid cooling plate and reducing the risk of condensation.

[0015] In some embodiments, the thickness D of the first anti-condensation layer satisfies the relationship: 0 < D ≤ 1.5 mm; this setting ensures that the thickness of the first anti-condensation layer always meets the anti-condensation requirements, thereby improving the anti-condensation reliability of the first anti-condensation layer; and / or, The thickness L of the second anti-condensation layer satisfies the relationship: 1.5mm < L ≤ 3.5mm; this setting ensures that the thickness of the second anti-condensation layer always meets the anti-condensation requirements, thereby improving the anti-condensation reliability of the second anti-condensation layer.

[0016] In some embodiments, along the first direction of the plate, both sides of the support beam are provided with bent sections, and the support beam is fixed to the first plate surface through the bent sections; this arrangement allows the support beam to be stably connected to the plate, which can increase the heat dissipation and anti-condensation area of ​​the plate, and also enhance the impact resistance of the plate.

[0017] In some embodiments, the bent section is fixed to the first plate surface by at least one of welding, bonding, snap-fitting, and screwing; this arrangement allows for greater flexibility in the manufacturing and installation of the support beam, meeting different manufacturing needs while facilitating maintenance and repair.

[0018] In some embodiments, the support beam is provided with reinforcing ribs; this arrangement can improve the rigidity of the support beam, disperse stress, and at the same time ensure the structural stability of the support beam and the liquid cooling plate.

[0019] In some embodiments, the reinforcing ribs protrude towards the side closest to the bent section; this arrangement enhances the supporting force of the support beam and ensures that the mounting surface of the support beam is flat, thereby providing more stable support for the liquid cooling plate.

[0020] Secondly, embodiments of the present invention provide a battery pack, the battery pack including a liquid cooling plate, battery cells, and a housing, wherein the liquid cooling plate is the aforementioned liquid cooling plate, the liquid cooling plate is disposed between the battery cells and the side wall of the housing, and the first plate surface is located on the side away from the battery cells; such a configuration can not only cool the battery pack and improve its working capacity, but also prevent condensation on the liquid cooling plate from damaging the internal structure of the battery pack, thereby improving the reliability of the battery pack.

[0021] In the embodiments of this application, a liquid cooling plate is disposed between the battery cell and the side wall of the casing, with the first surface of the plate located away from the battery cell. This arrangement facilitates the rapid transfer of heat generated by the battery cell to the liquid cooling plate, which then dissipates the heat to the outside of the battery pack, thereby achieving heat dissipation for the battery cell. Simultaneously, a support beam is disposed on the first surface, allowing it to effectively support the liquid cooling plate. Furthermore, since the total area of ​​the support beam projected along the height of the liquid cooling plate is less than 30% of the area of ​​the first surface, more space can be reserved on the first surface for anti-condensation operations (e.g., spraying an anti-condensation coating), thereby improving the anti-condensation effect of the liquid cooling plate, effectively protecting the battery cells and other structures within the battery pack, and enhancing the reliability of the battery pack.

[0022] In other words, compared with the liquid cooling plate in related technologies, the support beam of this application can not only effectively support the liquid cooling plate, but also occupy less space on the first plate surface, thereby expanding the effective area for anti-condensation operation, thereby improving the anti-condensation function of the liquid cooling plate and improving the problem of poor anti-condensation effect of the liquid cooling plate. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a battery pack provided in an embodiment of the present invention; Figure 2 This is a three-dimensional schematic diagram of the liquid cooling plate provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the liquid cooling plate (when the first support beam, the second support beam, and the third support beam all extend along the second direction) provided in an embodiment of the present invention from a first perspective. Figure 4This is a schematic diagram of a liquid cooling plate (when the second support beam extends along the second direction and both the first support beam and the third support beam extend along the first direction) provided in an embodiment of the present invention, viewed from a first perspective. Figure 5 This is an exploded view of the liquid cooling plate provided in an embodiment of the present invention; Figure 6 This is a cross-sectional view of the liquid cooling plate (with hollow interior of the reinforcing ribs) provided in an embodiment of the present invention from a second perspective. Figure 7 for Figure 6 Enlarged view of section A; Figure 8 for Figure 6 Enlarged view of section B; Figure 9 This is a cross-sectional view of the liquid cooling plate (with the reinforcing ribs being solid) provided in an embodiment of the present invention from a second perspective. Figure 10 This is a cross-sectional view of the liquid cooling plate (without reinforcing ribs) provided in an embodiment of the present invention from a second perspective.

[0025] 100. Liquid cooling plate; 10. Plate body; 11. First plate surface; 111. First area; 112. Second area; 12. First end; 13. Second end; 14. Liquid cooling channel; 15. Liquid outlet; 16. Liquid inlet; 20. Support beam; 21. First support beam; 211. Bending section; 212. Reinforcing rib; 22. Second support beam; 23. Third support beam; 30. First anti-condensation layer; 40. Second anti-condensation layer; 200. Battery pack; 210. Battery cell; 220. Housing. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0027] As mentioned in the background section, in related technologies, the liquid cooling plate has multiple horizontal sheet metal beams as supports along its short axis and multiple vertical sheet metal beams as supports along its long axis. Furthermore, the area occupied by the supports when supporting the liquid cooling plate is relatively large, resulting in a small area on the liquid cooling plate that can be used to spray the anti-condensation coating, thus leading to poor anti-condensation performance of the liquid cooling plate.

[0028] To address the problems existing in the relevant technologies, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, this application provides a battery pack 200, which includes a liquid cooling plate 100, battery cells 210, and a housing 220. The liquid cooling plate 100 includes a plate body 10 and a support beam 20. The plate body 10 has a first plate surface 11; the support beam 20 is disposed on the first plate surface 11, along the height direction of the liquid cooling plate 100 (i.e.,...). Figure 1 Within the projection of the height direction shown, the total area of ​​the support beam 20 is less than 30% of the area of ​​the first plate 11; the liquid cooling plate 100 is disposed between the side wall of the battery cell 210 and the housing 220, and the first plate 11 is located on the side away from the battery cell 210.

[0029] In this application, the liquid cooling plate 100 is disposed between the side wall of the battery cell 210 and the housing 220, and the first plate surface 11 of the plate 10 is located on the side away from the battery cell 210. This arrangement helps to quickly transfer the heat generated by the battery cell 210 to the liquid cooling plate 100, and then the heat is discharged from the liquid cooling plate 100 to the outside of the battery pack 200, thereby achieving the purpose of heat dissipation for the battery cell 210. At the same time, the support beam 20 is disposed on the first plate surface 11, which allows the support beam 20 to effectively support the liquid cooling plate 100. Moreover, since the total area of ​​the support beam 20 in the projection of the height direction of the liquid cooling plate 100 is less than 30% of the area of ​​the first plate surface 11, more space can be reserved on the first plate surface 11 for anti-condensation operations (such as spraying an anti-condensation coating), thereby improving the anti-condensation effect of the liquid cooling plate 100, effectively protecting the battery cell 210 and other structures inside the battery pack 200, and improving the reliability of the battery pack 200.

[0030] In other words, compared with the liquid cooling plate in the related technology, the support beam 20 of this application can not only effectively support the liquid cooling plate 100, but also occupy less space on the first plate surface 11, thereby expanding the effective area of ​​anti-condensation operation, thereby improving the anti-condensation function of the liquid cooling plate 100 and improving the problem of poor anti-condensation effect of the liquid cooling plate 100.

[0031] In some embodiments, see Figures 1 to 4 As shown, the support beam 20 includes multiple beams, which are arranged along the first direction of the plate 10 (i.e., Figure 2 , Figure 3 as well as Figure 4 The first direction shown is spaced apart on the first plate surface 11.

[0032] Specifically, multiple support beams 20 are spaced apart along the first direction of the plate 10 on the first plate surface 11. This allows the support beams 20 to effectively support the plate 10 at multiple locations, resulting in a more balanced force on the plate 10 and preventing tilting. Simultaneously, space can be reserved between the spaced support beams 20 for anti-condensation operations (such as spraying an anti-condensation coating), thereby improving the anti-condensation effect of the liquid cooling plate 100, reducing the risk of condensation during operation, and effectively protecting structures such as the battery cells 210 within the battery pack 200, thus improving the reliability of the battery pack 200.

[0033] In some embodiments, see Figures 1 to 4 As shown, the support beam 20 includes three beams, which are arranged along a first direction as a first support beam 21, a second support beam 22, and a third support beam 23; wherein, the second support beam 22 is arranged along a second direction perpendicular to the first direction (i.e., Figure 2 and Figure 3 The second direction shown in the figure extends from the first plate 11, and the first support beam 21 and the third support beam 23 are symmetrically arranged on both sides of the first support beam 21.

[0034] Specifically, the first direction is Figures 2 to 4As shown in the first direction, the first support beam 21, the second support beam 22, and the third support beam 23 are arranged sequentially and at intervals along the first direction, so that the layout of the three support beams 20 forms a stable support structure to support the plate 10 and the battery cell 210. The second support beam 22 extends along a second direction perpendicular to the first direction and is arranged on the first plate surface 11, cooperating with the first support beam 21 and the third support beam 23 to form a frame. When the battery pack 200 is subjected to external forces, such as vibration, impact, or compression, this frame structure can effectively disperse stress, prevent the plate 10 from deforming due to excessive local stress, thereby protecting the battery cell 210 from damage and ensuring the stability of the internal structure of the battery pack 200. Meanwhile, the regular layout of the three support beams 20 not only provides effective support for the plate 10 and the battery cell 210, but also maximizes the anti-condensation operation area of ​​the first plate surface 11. This allows operators to perform anti-condensation operations on more areas of the liquid cooling plate 100, thereby improving the anti-condensation effect of the liquid cooling plate 100 and reducing the risk of condensation. Furthermore, the relatively simple layout of the three support beams 20 improves production efficiency and reduces manufacturing costs to some extent. Moreover, the layout of the three support beams 20 provides a clear positioning reference for the installation of the liquid cooling plate 100 within the battery pack 200. Operators can quickly and accurately install the liquid cooling plate 100 into the correct position between the battery cell 210 and the side wall of the casing 220 based on the position and orientation of the support beams 20, thereby reducing installation time, minimizing the possibility of errors during installation, and improving installation efficiency.

[0035] In some embodiments, see Figures 1 to 4 As shown, along the second direction, the lengths of the first support beam 21 and the third support beam 23 are both less than the length of the second support beam 22.

[0036] Specifically, the lengths of the first support beam 21 and the third support beam 23 are both shorter than the length of the second support beam 22. This length difference helps guide the heat generated by the battery cell 210 to form a specific heat flow distribution on the first surface 11 of the liquid cooling plate 100. The shorter first support beam 21 and the third support beam 23 cause the heat conduction in their respective areas to be relatively concentrated, while the longer second support beam 22 can guide the heat to diffuse over a wider area. For example, the heat generated in the center of the battery cell 210 can be conducted more quickly to the edge of the liquid cooling plate 100 through the second support beam 22, while the heat on both sides is relatively concentrated and dissipated to the nearby area under the action of the first support beam 21 and the third support beam 23, thereby making the heat distribution on the entire surface of the battery cell 210 more uniform, avoiding local overheating, and thus improving the overall heat dissipation efficiency of the battery pack 200. When the battery pack 200 is subjected to external forces, the support beams 20 of different lengths can disperse the stress in different ways. The second support beam 22 is longer and can bear and disperse the pressure from the side walls of the battery cell 210 or the casing 220 over a larger range, playing a major supporting and stress dispersion role. The first support beam 21 and the third support beam 23 are shorter, providing auxiliary support on both sides. This enhances the support force on the plate 10 in localized areas, preventing deformation of the plate 10 due to localized stress concentration. The difference in length allows the support beam 20 to better adapt to external forces in different directions. The second support beam 22 extends along a second direction perpendicular to the first direction. Its longer length makes its support for the plate 10 more stable in this direction, effectively resisting external forces along the second direction. Although the lengths of the first support beam 21 and the third support beam 23 in the first direction are shorter than those of the second support beam 22, they can still work together with the second support beam 22 in the first direction to jointly cope with external forces from different directions, enhancing the adaptability of the liquid cooling plate 100 to complex external force environments. At the same time, the shorter first support beam 21 and the third support beam 23 can reserve more space for the first plate surface 11 in the first direction for anti-condensation operations, thus effectively reducing the risk of condensation on the liquid cooling plate 100 and improving the reliability of the battery pack 200.

[0037] In some embodiments, see Figures 1 to 3 As shown, the first support beam 21, the second support beam 22, and the third support beam 23 are all along the second direction (i.e., Figure 2 and Figure 3 (Extended in the second direction shown).

[0038] Specifically, the first support beam 21, the second support beam 22, and the third support beam 23 all extend along the second direction, providing a more unified directional guidance for the heat generated by the battery cell 210 during conduction. After the heat is transferred from the battery cell 210 to the first plate surface 11 of the liquid cooling plate 100, it can be conducted more orderly along the second direction determined by the support beam 20, avoiding disorderly diffusion of heat during conduction and thus improving heat conduction efficiency. For example, when the battery pack 200 is working, the heat on the surface of the battery cell 210 can be quickly and concentratedly transferred along the second direction through the support beams to a specific area of ​​the liquid cooling plate 100, accelerating heat dissipation, effectively reducing the temperature of the battery cell 210, and ensuring its stable operation. The fact that all three support beams extend along the second direction—the first support beam 21, the second support beam 22, and the third support beam 23—creates a stable "mountain"-shaped frame structure on the liquid cooling plate 100. When the battery pack 200 is subjected to external forces along the second direction, such as vibration, impact, or compression, the three support beams 20 can jointly bear and disperse these external forces, enhancing the resistance of the liquid cooling plate 100 to external forces in that direction. In actual installation, the battery cells 210 are mainly concentrated in the areas where the first support beam 21 and the third support beam 23 are located on the plate 10, as well as a portion of the area where the second support beam 22 is located. This provides primary support for the battery cells 210 and the plate 10, dispersing their weight as much as possible and reducing damage to the liquid cooling plate 100 due to stress concentration. Under the weight of the battery cells 210 or other external forces, the support beams 20 can evenly distribute the pressure, preventing stress concentration in any one area. For example, when the battery cells 210 apply pressure to the liquid cooling plate 100, the three support beams extending along the second direction can evenly distribute the pressure on the plate 10, reducing the risk of cracks or damage to the plate 10 due to stress concentration, and further improving the reliability of the battery pack 200 structure.

[0039] In some embodiments, see Figure 1 , Figure 2 as well as Figure 4 As shown, the second support beam 22 extends along the second direction, while the first support beam 21 and the third support beam 23 both extend along the first direction.

[0040] Specifically, the second support beam 22 extends along the second direction, while the first support beam 21 and the third support beam 23 both extend along the first direction. This arrangement provides multi-directional heat conduction paths for the heat generated by the battery cell 210. Heat generated at different parts of the battery cell 210 can be quickly conducted to various areas of the liquid cooling plate 100 along the support beams in different directions. For example, heat generated at one edge of the battery cell 210 can be quickly conducted through the first support beam 21 or the third support beam 23 extending along the first direction, while heat generated in the central area of ​​the battery cell 210 can be diffused to other directions by means of the second support beam 22 extending along the second direction. Multi-directional heat conduction effectively avoids heat accumulation in local areas of the battery cell 210, accelerates the heat dissipation process, ensures uniform temperature distribution of the battery cell 210 during operation, and maintains good working performance. The second support beam 22 extends along the second direction, while the first support beam 21 and the third support beam 23 both extend along the first direction, thus enabling the first support beam 21, the second support beam 22, and the third support beam 23 to form a stable "T"-shaped frame structure on the liquid cooling plate 100. This frame structure can withstand forces from the cell 210 and the side walls of the housing 220 from multiple directions, effectively dispersing stress. For example, when the battery pack 200 is impacted from a first direction, the first support beam 21 and the third support beam 23 extending along the first direction can directly resist the impact force. At the same time, the second support beam 22 extending along the second direction can also disperse some stress to other areas through the frame structure, preventing the liquid cooling plate 100 from deforming due to excessive local stress, protecting the cell 210 from damage, and ensuring the internal structural stability of the battery pack 200. Simultaneously, the support beams 20 in different directions support each other, enhancing the overall deformation resistance of the liquid cooling plate 100. Under the weight of the cell 210 or other external forces, the various support beams 20 can work together to prevent the plate 10 from twisting or bending. For example, when the battery cell 210 applies uneven pressure to the liquid cooling plate 100, the first support beam 21, the second support beam 22 and the third support beam 23 can adjust the force distribution of the plate 10 through their respective support functions, so that the liquid cooling plate 100 remains relatively flat, maintains good contact between it and the side wall of the battery cell 210 and the housing 220, and ensures the normal functioning of heat dissipation and structural function.

[0041] It should be noted that in this application, the first support beam 21, the second support beam 22, and the third support beam 23 can be arranged in either a "mountain" shape or a "T" shape on the first plate surface 11 as described above. This application does not impose any specific restrictions. However, for the convenience of introducing the liquid cooling plate 100 of this application, this application mainly describes the case where the first support beam 21, the second support beam 22, and the third support beam 23 are arranged in a "mountain" shape on the first plate surface 11 as described above.

[0042] In some embodiments, see Figures 1 to 5As shown, along the second direction, the plate 10 has a first end 12 and a second end 13 that are arranged opposite to each other, and a liquid cooling channel 14 is provided inside the plate 10. The two ends of the liquid cooling channel 14 are respectively provided with an outlet 15 and an inlet 16. The outlet 15 and the inlet 16 are both located at the first end 12, and the first support beam 21 and the third support beam 23 are arranged close to the second end 13.

[0043] Specifically, the outlet 15 and inlet 16 at both ends of the liquid cooling channel 14 are located at the first end 12, making the flow path of the coolant within the plate 10 relatively concentrated at one end for entry and exit. This design helps to form a more efficient coolant circulation pattern. For example, after the coolant enters the liquid cooling channel 14 from the inlet 16, it can quickly cover various areas within the plate 10 within a short distance, carrying away the heat transferred from the cell 210 to the plate 10, and then flows out from the outlet 15, thereby achieving the purpose of cooling the battery pack 200. In actual installation of the liquid cooling plate 100 of this application, the cell 210 is mainly concentrated on the plate 10 near the second end 13, while the first support beam 21 and the third support beam 23 are set near the second end 13, which helps to reasonably distribute the weight of the cell 210 and the plate 10 in terms of structure. Since the battery cells 210 are mainly concentrated on the plate 10 near the second end 13, placing the first support beam 21 and the third support beam 23 near the second end 13 can better distribute the weight of the battery cells 210 and the plate 10 evenly onto the housing 220, preventing the plate 10 from deforming due to the weight of the battery cells 210. The area on the plate 10 near the first end 12 is mainly used to support other components of the battery pack 200 (such as circuit boards), so the second support beam 22 alone can effectively support structures such as the circuit board (not shown in the figure).

[0044] In some embodiments, see Figures 1 to 4 As shown, the second support beam 22 divides the first plate surface 11 into a first region 111 and a second region 112. The liquid outlet 15 and the first support beam 21 are both located in the first region 111, and the liquid inlet 16 and the third support beam 23 are both located in the second region 112.

[0045] Specifically, the second support beam 22 divides the first plate 11 into a first region 111 and a second region 112. The liquid outlet 15 and the first support beam 21 are located in the first region 111, while the liquid inlet 16 and the third support beam 23 are located in the second region 112. This layout helps to even out the heat generated in different regions of the battery cell 210. The coolant enters the liquid cooling channel 14 from the liquid inlet 16, first cooling the portion of the battery cell 210 corresponding to the second region 112, absorbing heat, and then flowing to the first region 111 before exiting from the liquid outlet 15. During this process, the first support beam 21 enhances the heat conduction in the first region 111, allowing the heat from the battery cell 210 located in the first region 111 to be transferred to the coolant more quickly; the third support beam 23 plays a similar role in the second region 112. In this way, the heat from the battery cell 210 located in both the first region 111 and the second region 112 can be effectively carried away by the coolant, avoiding local overheating and improving the uniformity of heat dissipation. The second support beam 22 separates the first plate surface 11 into two regions (i.e., the first region 111 and the second region 112), not only serving as a separator but also enhancing the support for the two regions. The first support beam 21 is in the first region 111, and the third support beam 23 is in the second region 112. The three support beams work together to provide support for the plate 10 from different positions. When the battery cell 210 applies pressure to the liquid cooling plate 100, each support beam 20 can better disperse the stress and prevent the plate 10 from deforming. For example, when the battery pack 200 is subjected to vibration or impact, the support beam structure can effectively buffer external forces, protecting the battery cell 210 and the liquid cooling plate 100 from damage and enhancing the internal structural stability of the battery pack 200. In addition, the division of the first region 111 and the second region 112 also provides a defined location for subsequently spraying anti-condensation coatings of different thicknesses at corresponding positions on the liquid cooling plate according to the probability of condensation.

[0046] In some embodiments, see Figures 1 to 5 As shown, the liquid cooling plate 100 also includes a first anti-condensation layer 30 and a second anti-condensation layer 40. Along the first direction, the first anti-condensation layer 30 and the second anti-condensation layer 40 are respectively disposed on opposite sides of the second support beam 22.

[0047] Specifically, in the operating environment of the battery pack 200, temperature and humidity changes can easily cause condensation on the surface of the liquid cooling plate 100. The first anti-condensation layer 30 and the second anti-condensation layer 40 are respectively disposed on opposite sides of the second support beam 22 along a first direction, effectively blocking the conditions for condensation formation. The anti-condensation layers (i.e., the first anti-condensation layer 30 and the second anti-condensation layer 40) can reduce the surface temperature gradient in this area, reducing water vapor condensation caused by temperature differences. For example, when the external humidity is high and the internal coolant temperature of the liquid cooling plate 100 is low, the first anti-condensation layer 30 and the second anti-condensation layer 40 can bring the surface temperature of the plate 10 on both sides of the second support beam 22 closer to the ambient temperature, thereby reducing the possibility of water vapor condensing into water droplets on the surface and preventing condensation from damaging the internal components of the battery pack 200. If condensation occurs, it can easily drip onto the battery cell 210 or other electronic components, causing short circuits and other malfunctions. The first anti-condensation layer 30 and the second anti-condensation layer 40 provide reliable protection for the internal components of the battery pack 200 by preventing condensation. These features ensure that the battery cell 210 is always in a dry environment, guaranteeing its normal operation and extending its service life. They also reduce maintenance costs and safety risks caused by condensation-induced failures, thus improving the reliability and stability of the battery pack 200. Furthermore, when actually installing the liquid cooling plate 100 of this application, it needs to be placed between the battery cell 210 and the side wall of the housing 220. During this process, the first anti-condensation layer 30 and the second anti-condensation layer 40 are easily damaged by friction against the side wall of the housing 220. Since the first support beam 21 and the third support beam 23 are positioned close to the second end 13 in this application, when the liquid cooling plate 100 is installed, the end where the first support beam 21 and the third support beam 23 are located (i.e., the second end 13) enters the housing 220 first. During this process, the first support beam 21 and the third support beam 23 will separate the anti-condensation layer (the first anti-condensation layer 30 and the second anti-condensation layer 40) from the side wall of the housing 220, thereby preventing the first anti-condensation layer 30 and the second anti-condensation layer 40 from rubbing against the housing 220 and being damaged, thus better protecting the first anti-condensation layer 30 and the second anti-condensation layer 40.

[0048] In some embodiments, see Figures 1 to 4 As shown, along the second direction, the plate 10 has a first end 12 and a second end 13 that are arranged opposite to each other, and a liquid cooling channel 14 is provided inside the plate 10. The two ends of the liquid cooling channel 14 are respectively provided with a liquid outlet 15 and a liquid inlet 16; the liquid outlet 15 is located near the first anti-condensation layer 30.

[0049] Specifically, the liquid cooling plate 100 cools the battery pack 200 because its liquid cooling channel 14 contains flowing coolant. This allows the heat generated by the battery cells 210 and other structures within the battery pack 200 to be dissipated to the outside, thus achieving the purpose of cooling the battery pack 200. In actual operation, coolant enters the liquid cooling channel 14 through the inlet 16 and then exits through the outlet 15 to the outside of the liquid cooling plate 100, thereby carrying away the heat transferred from the battery cells 210 and other structures to the outside of the battery pack 200. When the liquid cooling channel 14 is actually configured, it is coiled in a specific pattern inside the plate 10, allowing the coolant to cover as much area of ​​the plate 10 as possible, thereby removing more heat and improving the heat dissipation effect on the battery pack 200.

[0050] In some embodiments, see Figures 1 to 4 As shown, the liquid inlet 16 is positioned near the second anti-condensation layer 40, and the thickness of the first anti-condensation layer 30 is less than the thickness of the second anti-condensation layer 40. Specifically, during the operation of the liquid cooling plate 100, the area on the plate 10 near the liquid inlet 16 (i.e., the second area 112) is more prone to condensation, while the area near the liquid outlet 15 (i.e., the first area 111) has a relatively lower risk of condensation compared to the second area 112. Therefore, to improve the anti-condensation effect of the liquid cooling plate 100, see [reference needed]. Figures 2 to 4 As shown, this application applies anti-condensation coatings of appropriate thicknesses to different areas on the first plate surface 11 based on the risk of condensation on the plate 10 (i.e., the thickness of the first anti-condensation layer 30 is less than that of the second anti-condensation layer 40). In other words, this application places the thinner first anti-condensation layer 30 in the first region 111 and the thicker second anti-condensation layer 40 in the second region 112. This improves the anti-condensation effect of the liquid cooling plate 100, reduces the risk of condensation on the liquid cooling plate 100, and thus improves the reliability of the battery pack 200.

[0051] In some embodiments, see Figures 6 to 8As shown, the thickness D of the first anti-condensation layer 30 satisfies the relationship: 0 < D ≤ 1.5 mm. Specifically, this thickness range (i.e., 0 < D ≤ 1.5 mm) ensures that the first anti-condensation layer 30 performs well in preventing condensation. When the battery pack 200 is running, the temperature difference between the first region 111 near the liquid outlet 15 and the inside of the battery pack 200 is smaller than that of the second region 112, and the risk of condensation is relatively small. Therefore, the thickness of the first anti-condensation layer 30 covering the first region 111 should not be too large. If the thickness of the first anti-condensation layer 30 is greater than 1.5 mm (i.e., D > 1.5 mm), although this can improve the anti-condensation effect of the first region 111, an excessively thick first anti-condensation layer 30 also has certain drawbacks. An excessively thick first anti-condensation layer 30 will not only waste resources, but also reduce the heat dissipation effect of the liquid cooling plate 100, and in severe cases may cause damage to the battery pack. Therefore, the thickness D of the first anti-condensation layer 30 needs to satisfy the relationship: 0 < D ≤ 1.5 mm.

[0052] Optionally, the thickness L of the second anti-condensation layer 40 satisfies the relationship: 1.5mm < L ≤ 3.5mm. Specifically, this thickness range (i.e., 1.5mm < L ≤ 3.5mm) ensures that the second anti-condensation layer 40 performs well in preventing condensation. During battery pack 200 operation, the second region 112, closer to the liquid inlet 16, has a larger temperature difference than the first region 111 (because the coolant temperature is generally lower), and the risk of condensation is relatively higher. Therefore, the second anti-condensation layer 40 covering the second region 112 must have a corresponding thickness. If the thickness of the second anti-condensation layer 40 is less than or equal to 1.5mm (i.e., L ≤ 1.5mm), this may weaken the anti-condensation effect of the second region 112. Consequently, during battery pack 200 operation, condensation is likely to occur in the second region 112, which can easily damage structures such as the battery cells 210 within the battery pack 200. If the thickness of the second anti-condensation layer 40 is greater than 3.5 mm (i.e., L > 3.5 mm), while this can improve the anti-condensation effect of the second region 112, an excessively thick second anti-condensation layer 40 also has certain drawbacks. An excessively thick second anti-condensation layer 40 not only wastes resources but also reduces the heat dissipation effect of the liquid cooling plate 100, and in severe cases, may damage the battery pack. Therefore, the thickness L of the second anti-condensation layer 40 needs to satisfy the relationship: 0 < D ≤ 1.5 mm.

[0053] In some embodiments, see Figures 2 to 4 As shown, along the first direction, both sides of the support beam 20 are provided with bent sections 211, and the support beam 20 is fixed to the first plate surface 11 through the bent sections 211.

[0054] Specifically, along the first direction, the bent sections 211 on both sides of the support beam 20 not only ensure a stable connection between the support beam 20 and the first plate surface 11, but also provide the first plate surface 11 with a larger heat dissipation area. If the support beam 20 were not provided with bent sections 211, and instead one side of the support beam 20 were entirely attached to the first plate surface 11, while this would provide good support for the plate 10, it would result in excessive space being occupied by the support beam 20, reducing the heat dissipation area of ​​the first plate surface 11. Simultaneously, it would reduce the installation area reserved for the first anti-condensation layer 30 and the second anti-condensation layer 40 on the first plate surface 11, significantly reducing the anti-condensation effect of the liquid cooling plate 100. Therefore, this application provides bent sections 211 on both sides of the support beam 20. Furthermore, compared to the method where one side of the support beam 20 is entirely attached to the first plate surface 11, the method of providing bent sections 211 on both sides of the support beam 20 is more resistant to impacts from external forces. When the liquid cooling plate 100 is subjected to external impact and vibrates, the support beam 20 with the bending section 211 can better offset the vibration and prevent the connection between the support beam 20 and the plate 10 from loosening, thereby making the liquid cooling plate 100 more reliable.

[0055] In some embodiments, see Figures 2 to 4 , Figures 6 to 8 As shown, the bent section 211 is fixed to the first plate surface 11 by at least one of welding, bonding, snap-fitting and screwing.

[0056] Specifically, the bent section 211 can be fixed to the first plate 11 by at least one of welding, bonding, snap-fitting, and screwing, which provides great flexibility for manufacturing. Different fixing methods are suitable for different material combinations. If the support beam 20 and the first plate 11 are made of metal, welding can form a high-strength connection, fully utilizing the weldability of the metal and ensuring a stable connection. For situations where high-temperature welding cannot be performed or where different materials (such as metal and plastic) need to be connected, bonding can solve the problem well, as a suitable adhesive can provide good adhesion to a variety of materials. Snap-fitting and screwing are more suitable for situations requiring detachability, facilitating later maintenance and repair, especially when the support beam 20 or plate 10 needs to be replaced, this detachable fixing method can greatly reduce maintenance costs. This embodiment shows the case where the bent section 211 is fixed to the first plate 11 by welding.

[0057] It should be noted that, in this application, to improve the anti-condensation effect of the liquid cooling plate 100, when setting the first anti-condensation layer 30 and the second anti-condensation layer 40, either the first anti-condensation layer 30 or the second anti-condensation layer 40 can be used to cover the bent section 211 of the support beam 20. Because condensation easily occurs at the connection between the bent section 211 and the first plate surface 11 during operation, covering the bent section 211 of the support beam 20 with the first anti-condensation layer 30 or the second anti-condensation layer 40 can effectively prevent condensation and improve the anti-condensation effect of the liquid cooling plate 100. Furthermore, since the support beam 20 is connected to the first plate surface 11 by the bent section 211, a portion of the first plate surface 11, although covered by the support beam 20, is not in contact with it. To further improve the anti-condensation effect of the liquid cooling plate 100, an anti-condensation coating (i.e., the first anti-condensation layer 30 and the second anti-condensation layer 40) can also be applied to these areas (i.e., areas that are covered by the support beam 20 but are not in contact with the support beam 20). This can be reasonably selected according to needs and actual conditions, and this application does not impose specific restrictions. Meanwhile, this embodiment shows that the areas on the first plate surface 11 that are covered by the support beam 20 and are not in contact with the support beam 20 are not provided with an anti-condensation coating.

[0058] In some embodiments, see Figure 6 and Figure 9 As shown, the support beam 20 is provided with reinforcing ribs 212. Specifically, the reinforcing ribs 212 on the support beam 20 can effectively improve the rigidity of the support beam 20. The reinforcing ribs 212 change the cross-sectional shape of the support beam 20, giving it better support. When the battery pack 200 is subjected to external forces, such as vibration, impact, or pressure from the battery cells 210, the support beam 20 can better resist deformation thanks to the reinforcing ribs 212. For example, when the battery pack 200 encounters bumps during transportation, the reinforcing ribs 212 can keep the support beam 20 in its original shape, preventing it from bending due to external forces, thereby continuously providing stable support for the battery cells 210 and protecting them from crush damage caused by deformation of the support beam. At the same time, the reinforcing ribs 212 can also disperse stress concentration. Without the reinforcing ribs 212, external forces may be concentrated on certain parts of the support beam 20, making these parts prone to cracks or damage. The presence of the reinforcing rib 212 allows stress to be evenly distributed across a wider area of ​​the support beam 20. For example, when the weight of the battery cell 210 exerts pressure on the support beam 20, the reinforcing rib 212 disperses the pressure, reducing local stress levels, extending the service life of the support beam 20, and ensuring the long-term stability of the liquid cooling plate 100 structure. Furthermore, the specific shape of the reinforcing rib 212 can be reasonably selected based on actual conditions and needs; this application does not impose specific limitations. Figure 6 and Figure 9The cases of the reinforcing rib 212 being hollow and solid are shown respectively.

[0059] It is understood that, in the actual manufacturing of the liquid cooling plate 100 in this application, the choice between providing reinforcing ribs 212 on the support beam 20 can be made according to the usage environment of the liquid cooling plate 100. If the liquid cooling plate 100 is used in an environment where the battery cell 210 is lightweight or not prone to impact, the reinforcing ribs 212 on the support beam 20 may not be necessary. Figure 10 As shown. In other words, when actually manufacturing the liquid cooling plate 100, it is possible to choose whether to set reinforcing ribs 212 on the support beam 20 based on the actual situation and needs. This application does not impose specific restrictions.

[0060] In some embodiments, see Figure 6 and Figure 9 As shown, the reinforcing rib 212 protrudes towards the side closer to the bending section 211. Specifically, the protrusion of the reinforcing rib 212 towards the side closer to the bending section 211 significantly enhances the supporting force near the bending section 211. The bending section 211, as the connection point between the support beam 20 and the first plate surface 11, bears significant stress during the operation of the battery pack 200. The protrusion of the reinforcing rib 212 towards the side closer to the bending section 211 increases the structural strength of the bending section 211 area. For example, when the battery pack 200 is subjected to vibration or impact, the reinforcing rib 212 helps the bending section 211 better resist external forces, preventing deformation or detachment from the first plate surface 11, ensuring a stable connection between the support beam 20 and the first plate surface 11, thereby guaranteeing the structural stability of the entire liquid cooling plate 100 and protecting the battery cell 210 from damage caused by structural loosening. In addition, the reinforcing rib 212 protrudes towards the side near the bending section 211, which makes the side of the support beam 20 that fits against the housing 220 of the battery pack 200 more flat. This makes it less likely for the liquid cooling plate 100 to tilt when installed in the housing 220, and provides stable support for the cell 210 and other structures of the battery pack, thereby improving the reliability of the battery pack 200.

[0061] In summary, the liquid cooling plate and battery pack of this application have at least the following beneficial effects: (1) By rationally arranging the support beams, the anti-condensation operation area can be effectively expanded, the anti-condensation effect of the liquid cooling plate can be improved, and the reliability of the battery pack can be enhanced.

[0062] (2) The different lengths of the support beams can optimize the heat flow distribution and disperse the stress, thereby improving the heat dissipation efficiency and structural reliability of the liquid cooling plate.

[0063] (3) When the supporting beams extend in the same direction, the direction of heat conduction can be unified, a stable frame can be constructed, and the heat dissipation and structural stability of the liquid cooling plate can be improved.

[0064] (4) When the support beam extends along different directions, it can provide multi-directional heat conduction paths, enhancing the deformation resistance and stability of the liquid cooling plate.

[0065] (5) The outlet and inlet are set on the same side, which can form an efficient coolant circulation. At the same time, the support beam can reasonably share the weight of the liquid cooling plate and the structure on the liquid cooling plate, and prevent the plate from deforming.

[0066] (6) By rationally dividing the area for the layout of support beams, liquid inlets and liquid outlets, heat can be balanced and stress can be dispersed, thereby providing more area for the installation of anti-condensation coatings.

[0067] (7) The two sides of the second support beam are provided with anti-condensation coating, which can effectively block the formation of condensation, thereby protecting the internal components of the battery pack and improving the reliability of the battery pack.

[0068] (8) Setting anti-condensation coatings of different thicknesses according to the level of condensation risk can improve the anti-condensation effect of liquid cooling plates and reduce the risk of condensation.

[0069] (9) The support beam has bent sections on both sides, which allows the support beam to be stably connected to the plate, which can increase the heat dissipation effect and anti-condensation area of ​​the plate, and enhance the impact resistance of the liquid cooling plate.

[0070] (10) The bending section can be fixed in a variety of ways, which can provide flexibility for the design and manufacturing of liquid cooling plates, meet the usage needs of different scenarios, and facilitate maintenance and repair.

[0071] (11) The support beam is equipped with reinforcing ribs, which can improve the rigidity of the support beam and also disperse stress, ensuring the structural stability of the support beam and liquid cooling plate.

[0072] (12) The reinforcing ribs protrude towards the side closer to the bending section (i.e. the side closer to the plate body), which can enhance the supporting force of the support beam and make the mounting surface of the support beam flatter, so that the support beam can provide more stable support for the liquid cooling plate.

[0073] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A liquid-cooled plate (100), characterized in that, include: The plate (10) has a first plate surface (11); A support beam (20) is disposed on the first plate surface (11). In the projection of the liquid cooling plate (100) in the height direction, the total area of ​​the support beam (20) is less than 30% of the area of ​​the first plate surface (11).

2. The liquid-cooled plate (100) according to claim 1, characterized in that, The support beam (20) includes multiple beams, which are spaced apart on the first plate surface (11) along the first direction of the plate body (10).

3. The liquid-cooled plate (100) according to claim 2, characterized in that, The support beam (20) includes three beams, which are arranged along the first direction of the plate (10) as the first support beam (21), the second support beam (22) and the third support beam (23). The second support beam (22) extends along a second direction perpendicular to the first direction and is disposed on the first plate surface (11). The first support beam (21) and the third support beam (23) are symmetrically disposed on both sides of the first support beam (21).

4. The liquid-cooled plate (100) according to claim 3, characterized in that, Along the second direction, the lengths of the first support beam (21) and the third support beam (23) are both less than the length of the second support beam (22).

5. The liquid-cooled plate (100) according to claim 3, characterized in that, The first support beam (21), the second support beam (22) and the third support beam (23) all extend along the second direction.

6. The liquid-cooled plate (100) according to claim 3, characterized in that, The second support beam (22) extends along the second direction, and the first support beam (21) and the third support beam (23) both extend along the first direction.

7. The liquid-cooled plate (100) according to claim 3, characterized in that, Along the second direction, the plate (10) has a first end (12) and a second end (13) arranged opposite to each other, and a liquid cooling channel (14) is provided inside the plate (10), with an outlet (15) and an inlet (16) respectively provided at both ends of the liquid cooling channel (14). The liquid outlet (15) and the liquid inlet (16) are both located at the first end (12), and the first support beam (21) and the third support beam (23) are located near the second end (13).

8. The liquid-cooled plate (100) according to claim 7, characterized in that, The second support beam (22) divides the first plate surface (11) into a first region (111) and a second region (112). The liquid outlet (15) and the first support beam (21) are both located in the first region (111), and the liquid inlet (16) and the third support beam (23) are both located in the second region (112).

9. The liquid-cooled plate (100) according to claim 3, characterized in that, The liquid cooling plate (100) further includes a first anti-condensation layer (30) and a second anti-condensation layer (40). Along the first direction, the first anti-condensation layer (30) and the second anti-condensation layer (40) are respectively disposed on opposite sides of the second support beam (22).

10. The liquid-cooled plate (100) according to claim 9, characterized in that, Along the second direction, the plate (10) has a first end (12) and a second end (13) arranged opposite to each other, and a liquid cooling channel (14) is provided inside the plate (10), with an outlet (15) and an inlet (16) respectively provided at both ends of the liquid cooling channel (14). The liquid outlet (15) is located near the first anti-condensation layer (30), and the liquid inlet (16) is located near the second anti-condensation layer (40).

11. The liquid-cooled plate (100) according to claim 9, characterized in that, The thickness of the first anti-condensation layer (30) is less than the thickness of the second anti-condensation layer (40).

12. The liquid-cooled plate (100) according to claim 11, characterized in that, The thickness D of the first anti-condensation layer (30) satisfies the following relationship: 0 < D ≤ 1.5 mm; and / or, The thickness L of the second anti-condensation layer (40) satisfies the following relationship: 1.5mm < L ≤ 3.5mm.

13. The liquid-cooled plate (100) according to any one of claims 1 to 12, characterized in that, Along the first direction of the plate (10), both sides of the support beam (20) are provided with bent sections (211), and the support beam (20) is fixed to the first plate surface (11) through the bent sections (211).

14. The liquid-cooled plate (100) according to claim 13, characterized in that, The bent section (211) is fixed to the first plate surface (11) by at least one of welding, bonding, snap-fitting and screwing.

15. The liquid-cooled plate (100) according to claim 13, characterized in that, The support beam (20) is provided with reinforcing ribs (212).

16. The liquid-cooled plate (100) according to claim 15, characterized in that, The reinforcing rib (212) protrudes towards the side closer to the bent section (211).

17. A battery pack (200), characterized in that, The battery pack (200) includes a liquid cooling plate (100), a battery cell (210), and a housing (220). The liquid cooling plate (100) is the liquid cooling plate (100) according to any one of claims 1 to 16. The liquid cooling plate (100) is disposed between the battery cell (210) and the side wall of the housing (220), and the first plate surface (11) is located on the side away from the battery cell (210).

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