Battery water cooling plate based on micro-channel technology

Abstract

The utility model discloses a battery water cooling plate based on microchannel technology, through vertically setting multiple second heat exchange plates on the first heat exchange plate, form all -round contact heat dissipation to battery package top surface and both sides, have increased effective heat exchange area greatly, solved the problem of the insufficient heat exchange area of traditional single -side cooling mode, realized the uniform heat dissipation of multiple battery package, effectively improved the temperature consistency of battery module, and through setting the microchannel structure of intercommunication in the first heat exchange plate, second heat exchange plate and radiating fin respectively, formed the complete evaporation -condensation circulation loop, gave full play to the efficient characteristics of phase change heat transfer, simultaneously, the smooth flow of working medium between each heat exchange area is ensured by the optimized flow channel layout, both avoid the problem of the excessive pressure drop of traditional microchannel, and maintain the circulation stability of system, guarantee the heat dissipation performance, provide reliable thermal management solution for high energy density battery system.

Description

Technical Field

[0001] This utility model belongs to the field of battery thermal management technology, and relates to a battery water-cooled plate, specifically a battery water-cooled plate based on microchannel condensation. Background Technology

[0002] With the rapid development of electric vehicles and energy storage systems, the thermal management of high-energy-density power batteries has become increasingly prominent. Batteries generate a significant amount of heat during charging and discharging; if this heat is not dissipated effectively and promptly, it can lead to increased battery temperature, performance degradation, and even thermal runaway, posing safety hazards. Therefore, efficient battery cooling technology is crucial for ensuring the safety and lifespan of battery packs.

[0003] Currently, thermal management of power batteries mainly adopts single-phase liquid cooling technology, in which the water-cooled plate is usually arranged at the bottom or one side of the battery pack, and heat exchange is achieved through forced convection of the coolant. However, this cooling method has the following limitations: First, the single-sided contact results in a limited heat dissipation area, which is difficult to meet the heat dissipation requirements of high-power batteries; second, the single cooling surface leads to uneven temperature distribution inside the battery pack, affecting battery consistency and cycle life; third, the reliance on high-flow-rate pumping of coolant increases the system's additional power consumption.

[0004] In recent years, microchannel technology has been introduced into the field of battery cooling due to its high specific surface area and compact structure. However, traditional microchannel designs often suffer from excessive flow resistance due to channel size limitations, which reduces cooling efficiency. Furthermore, while phase change heat transfer technologies (such as heat pipes and vapor chambers) have shown excellent performance in electronic heat dissipation, their application in battery thermal management still faces challenges: First, the spatial layout of the evaporation and condensation sections is difficult to balance, affecting the stability of the working fluid cycle; second, uneven distribution of the working fluid in multi-heat source environments can easily lead to localized overheating or poor reflux; third, the independent installation of traditional condensation and heat dissipation structures results in excessively long heat conduction paths, affecting the heat dissipation response speed.

[0005] To address the aforementioned issues, there is an urgent need for a novel battery cooling solution that can achieve efficient, uniform, and low-energy thermal management within a limited space, while also ensuring structural compactness and system reliability. Utility Model Content

[0006] To address the technical problems existing in the background art, this utility model proposes a battery water-cooled plate based on microchannel condensation. Through an innovative three-dimensional heat dissipation structure, it significantly improves the overall performance of the battery thermal management system and provides a reliable thermal management solution for high-energy-density battery systems.

[0007] The objective of this utility model can be achieved through the following technical solutions: The battery water-cooling plate based on microchannel technology includes a first heat exchange plate and multiple second heat exchange plates vertically mounted on the first heat exchange plate. The multiple second heat exchange plates are arranged at equal intervals along a first direction. The spacing between two adjacent second heat exchange plates is adapted to the length / width dimensions of the battery pack so as to fit and snap the multiple battery packs between the multiple second heat exchange plates. The first heat exchange plate is horizontally positioned above the battery pack and in close contact with the top surface of the battery pack to dissipate heat from the top surface of the battery pack. The second heat exchange plates are parallel to and clamped on both sides of the battery pack and in close contact with the sides of the battery pack to dissipate heat from the two sides of the battery pack.

[0008] Furthermore, multiple second heat exchange plates are continuously arranged along a second direction to form multiple sets of second heat exchange plates that are equidistantly spaced along a first direction in the second direction.

[0009] Furthermore, the second heat exchange plate is welded to one side of the first heat exchange plate, and multiple heat dissipation fins are evenly distributed on the other side of the first heat exchange plate.

[0010] Furthermore, the first heat exchange plate is provided with a first microchannel structure, which is filled with a two-phase working fluid for circulating heat exchange. The second heat exchange plate is provided with a second microchannel structure, which is connected to the first microchannel structure, so that the liquid two-phase working fluid enters the second microchannel structure and exchanges heat with the battery pack for evaporation. The heat dissipation fins are provided with a third microchannel structure, which is connected to the first microchannel structure, so that the gaseous two-phase working fluid enters the third microchannel structure and exchanges heat with the external environment for condensation.

[0011] Furthermore, the first microchannel structure includes a first channel extending along a first direction to both ends of the first heat exchange plate, the second microchannel structure includes a second channel extending along a vertical direction to both ends of the second heat exchange plate, and the second channels of the plurality of second heat exchange plates arranged along the first direction are all connected to the first channel, and the third microchannel structure includes a third channel extending along a vertical direction to both ends of the heat dissipation fins, and the third channels of the plurality of heat dissipation fins arranged along the first direction are all connected to the first channel.

[0012] Furthermore, multiple first and second channels are arranged at equal intervals along the second direction, and multiple second channels are respectively connected to multiple first channels. The third channels of multiple heat dissipation fins arranged along the second direction are respectively connected to multiple first channels.

[0013] Furthermore, the first microchannel structure also includes a plurality of fourth channels extending along the second direction to both ends of the first heat exchange plate. The plurality of fourth channels are perpendicularly intersecting and connected to the first channel. The second channels of the plurality of second heat exchange plates arranged along the first direction are respectively connected to the plurality of fourth channels. Each fourth channel is connected to the third channel of the plurality of heat dissipation fins arranged along the second direction.

[0014] Furthermore, the first microchannel structure also includes multiple fifth channels, each of which is perpendicularly intersecting and connected to the first channel. The third channels of the multiple heat dissipation fins arranged along the first direction are respectively connected to the multiple fourth / fifth channels. Each fifth channel is connected to the third channel of the multiple heat dissipation fins arranged along the second direction.

[0015] Furthermore, the first microchannel structure also includes multiple sixth channels and multiple seventh channels. The multiple sixth channels are respectively arranged below the multiple fifth channels, and the sixth channels are connected to the corresponding fifth channels through the multiple seventh channels.

[0016] Furthermore, a metal foam layer is provided on the first heat exchange plate, and the metal foam layer is in close contact with the top surface of the battery pack.

[0017] The beneficial effects of this utility model are as follows: The battery water-cooled plate provided in this application, by vertically arranging multiple second heat exchange plates on the first heat exchange plate, forms an all-round contact heat dissipation for the top and two sides of the battery pack, significantly increasing the effective heat exchange area. This fundamentally solves the problem of insufficient heat exchange area in traditional single-sided cooling methods, achieving uniform heat dissipation for multiple battery packs, effectively improving the temperature consistency of the battery module. Furthermore, it creatively combines a two-phase working fluid circulation system with microchannel technology, by setting interconnected microchannel structures in the first heat exchange plate, second heat exchange plates, and heat dissipation fins, forming... This design forms a complete evaporation-condensation cycle. The liquid working fluid efficiently absorbs heat and evaporates within the heat exchange plate in contact with the battery pack, while the gaseous working fluid rapidly condenses in the external heat dissipation fins. This fully leverages the high efficiency of phase change heat transfer. At the same time, the optimized flow channel layout ensures smooth flow of the working fluid between each heat exchange area, avoiding the problem of excessive pressure drop in traditional microchannel systems and maintaining the system's cyclic stability. The overall structure of this application is compact and reasonable, perfectly adapting to the spatial layout requirements of the battery module while ensuring heat dissipation performance, providing a reliable thermal management solution for high-energy-density battery systems. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0019] Figure 2 This is a front view of the present invention.

[0020] Figure 3 for Figure 2 A partial cross-sectional view at point A in the middle.

[0021] Figure 4 for Figure 2 A schematic diagram of the cross-section at point B.

[0022] Figure 5 for Figure 2 A schematic diagram of the cross-section at point C. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-2 As shown, this utility model provides a battery water-cooling plate based on microchannel technology, including a first heat exchange plate 1 and multiple second heat exchange plates 2 vertically mounted on the first heat exchange plate 1. The multiple second heat exchange plates 2 are arranged at equal intervals along a first direction, and the interval between two adjacent second heat exchange plates 2 is adapted to the length / width dimensions of the battery pack 3, so as to fit and clamp the multiple battery packs 3 between the multiple second heat exchange plates 2. The first heat exchange plate 1 is horizontally arranged above the battery pack and in close contact with the top surface of the battery pack 3 to dissipate heat from the top surface of the battery pack 3. The second heat exchange plates 2 are parallel to and clamped on both sides of the battery pack 3 and in close contact with the sides of the battery pack 3 to dissipate heat from the two sides of the battery pack 3. This achieves three-dimensional heat dissipation of the top surface and both sides of the battery pack 3, significantly increasing the effective heat exchange area. Furthermore, by using the second heat exchange plates 2 to tightly clamp the battery pack 3, the contact thermal resistance can be minimized, improving heat dissipation efficiency. The overall structure is compact and can be directly integrated into the battery module, saving space.

[0025] Multiple second heat exchange plates 2 are continuously arranged along a second direction to form multiple sets of second heat exchange plates 2 arranged at equal intervals along a first direction, constituting multiple cooling units. This supports the expansion needs of large-size battery modules, flexibly adapts to different numbers of battery packs 3, and multiple independent cooling units can balance flow resistance, avoiding insufficient cooling of distant battery packs 3 and improving temperature consistency. The second heat exchange plates 2 are made of aluminum alloy with high thermal conductivity, effectively improving heat conduction efficiency. A metal foam layer 16 is provided on one side of the first heat exchange plate 1, which is in close contact with the top surface of the battery pack 3. Utilizing the high thermal conductivity and flexible compressibility of the metal foam layer, it can fill the assembly gap when tightly attached to the top surface of the battery pack 3, reducing contact thermal resistance. Its porous structure increases the effective heat exchange area, further improving interface heat transfer performance. Multiple heat dissipation fins 4 are evenly distributed on the other side of the first heat exchange plate 1. The heat dissipation fins 4 passively enhance the heat exchange with the ambient cold source, further improving heat dissipation efficiency, and eliminating the need for an additional fan, reducing energy consumption and noise.

[0026] The first heat exchange plate 1 has a first microchannel structure filled with a two-phase working fluid for circulating heat exchange. The second heat exchange plate 2 has a second microchannel structure connected to the first microchannel structure, allowing the liquid two-phase working fluid to enter the second microchannel structure and exchange heat with the battery pack 3 for evaporation. The heat dissipation fins 4 have a third microchannel structure connected to the first microchannel structure, allowing the gaseous two-phase working fluid to enter the third microchannel structure and exchange heat with the external environment for condensation. This constructs a two-phase working fluid circulation system. Utilizing the phase change heat transfer of the two-phase working fluid, the two-phase working fluid evaporates and absorbs heat in the second heat exchange plate 2, and condenses and releases heat in the heat dissipation fins 4. The heat capacity is significantly improved compared to single-phase liquid cooling. Furthermore, the microchannel partitioning design achieves physical isolation between the evaporation and condensation sections, avoiding gas-liquid interference and maximizing heat exchange efficiency.

[0027] like Figure 3 As shown, the first microchannel structure includes a first channel 11 extending along the first direction to both ends of the first heat exchange plate 1, the second microchannel structure includes a second channel 21 extending along the vertical direction to both ends of the second heat exchange plate 2, and the second channels 21 of the plurality of second heat exchange plates 2 arranged along the first direction are all connected to the first channel 11, and the third microchannel structure includes a third channel 41 extending along the vertical direction to both ends of the heat dissipation fins 4, and the third channels 41 of the plurality of heat dissipation fins 4 arranged along the first direction are all connected to the first channel 11. In summary, by connecting all the second channels 21 and the third channel 41 laterally through the first channel 11, a tree-like distribution network is formed, ensuring that the two-phase working fluid is evenly distributed to the contact surface of each battery pack 3. During use, the liquid two-phase working fluid in the first channel 11 flows into the second channel 21 under the action of gravity. The liquid two-phase working fluid absorbs the heat emitted from the side of the battery pack 3 in the second channel 21 and evaporates, becoming a gaseous two-phase working fluid that floats up along the second channel 21 and enters the third channel 41 through the first channel 11. The gaseous two-phase working fluid releases heat to the external environment and condenses in the third channel 41, becoming a liquid two-phase working fluid that flows back into the first channel 11, forming the first circulation loop. The vertical second channel 21 and third channel 41 can optimize the flow of the gravity-assisted two-phase working fluid, accelerate the return of condensate, and improve the stability of the two-phase working fluid circulation.

[0028] Multiple first channels 11 and second channels 21 are arranged at equal intervals along the second direction. Multiple second channels 21 are connected to multiple first channels 11 respectively. The third channels 41 of multiple heat dissipation fins 4 arranged along the second direction are connected to multiple first channels 11 respectively. Thus, through the parallel design of multiple channels, the heat exchange area between the second heat exchange plate 2 and the battery pack 3, as well as the heat exchange area between the heat dissipation fins 4 and the external environment, is increased, thereby improving heat exchange efficiency. Through the one-to-one connection between the first channels 11, the second channels 21, and the third channels 41, the position of the battery pack 3 is precisely matched, and independent temperature control in different areas is achieved, avoiding uneven heating and cooling and improving the reliability of cooling.

[0029] like Figure 4 As shown, the first microchannel structure also includes a plurality of fourth channels 12 extending along the second direction to both ends of the first heat exchange plate 1. The plurality of fourth channels 12 are perpendicularly intersecting and connected to the first channel 11. The second channels 21 of the plurality of second heat exchange plates 2 arranged along the first direction are respectively connected to the plurality of fourth channels 12. Each fourth channel 12 is connected to the third channel 41 of the plurality of heat dissipation fins 4 arranged along the second direction. By intersecting and connecting the first channel 11 through the fourth channels 12, the flow path of the two-phase working fluid inside the first heat exchange plate 1 is shortened, the system pressure drop is reduced, the circulation of the two-phase working fluid is accelerated, and the uniformity of heat dissipation for the battery module is improved.

[0030] like Figure 5 As shown, the first microchannel structure also includes multiple fifth channels 13, each of which is perpendicularly intersecting and connected to the first channel 11. The third channels 41 of the multiple heat dissipation fins 4 arranged along the first direction are respectively connected to the multiple fourth channels 12 / fifth channels 13. Each fifth channel 13 is connected to the corresponding third channel 41 of the multiple heat dissipation fins 4 arranged along the second direction. The first microchannel structure also includes multiple sixth channels 14 and multiple seventh channels 15. The multiple sixth channels 14 are respectively disposed below the multiple fifth channels 13, and the sixth channels 14 are connected to the corresponding fifth channels 13 through the multiple seventh channels 15. In summary, a gridded second circulation loop for the two-phase working fluid is formed through the fifth channel 13 in the upper layer, the sixth channel 14 in the lower layer, and the seventh channel 15 connecting the upper and lower layers. The liquid two-phase working fluid in the fifth channel 13 flows into the sixth channel 14 through the seventh channel 15 under the action of gravity. The liquid two-phase working fluid absorbs the heat emitted from the top surface of the battery pack 3 in the sixth channel 14 and evaporates, becoming a gaseous two-phase working fluid that floats up along the seventh channel 15 and enters the third channel 41 through the fifth channel 13. The gaseous two-phase working fluid releases heat to the external environment and condenses in the third channel 41, becoming a liquid two-phase working fluid that flows back into the first channel 11, realizing gravity-driven self-circulation. The gas phase rises to the fins and condenses, while the liquid phase sinks and flows back, reducing flow resistance and lowering pump power requirements.

[0031] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A battery water-cooled plate based on microchannel technology, characterized in that, The battery pack (3) includes a first heat exchange plate (1) and multiple second heat exchange plates (2) vertically mounted on the first heat exchange plate (1). The multiple second heat exchange plates (2) are arranged at equal intervals along a first direction. The interval between two adjacent second heat exchange plates (2) is adapted to the length / width of the battery pack (3) so that the multiple battery packs (3) can be fitted between the multiple second heat exchange plates (2). The first heat exchange plate (1) is horizontally positioned above the battery pack and in close contact with the top surface of the battery pack (3) to dissipate heat from the top surface of the battery pack (3). The second heat exchange plates (2) are parallel to each other on both sides of the battery pack (3) and in close contact with the sides of the battery pack (3) to dissipate heat from the two sides of the battery pack (3).

2. The battery water-cooling plate according to claim 1, characterized in that, Multiple second heat exchange plates (2) are arranged continuously along a second direction to form multiple sets of second heat exchange plates (2) arranged at equal intervals along a first direction in the second direction.

3. The battery water-cooling plate according to claim 1, characterized in that, The second heat exchange plate (2) is welded to one side of the first heat exchange plate (1), and multiple heat dissipation fins (4) are evenly distributed on the other side of the first heat exchange plate (1).

4. The battery water-cooling plate according to claim 3, characterized in that, The first heat exchange plate (1) is provided with a first microchannel structure, which is filled with a two-phase working fluid for circulating heat exchange. The second heat exchange plate (2) is provided with a second microchannel structure, which is connected to the first microchannel structure so that the liquid two-phase working fluid enters the second microchannel structure and exchanges heat with the battery pack (3) for evaporation. The heat dissipation fins (4) are provided with a third microchannel structure, which is connected to the first microchannel structure so that the gaseous two-phase working fluid enters the third microchannel structure and exchanges heat with the external environment for condensation.

5. The battery water-cooling plate according to claim 4, characterized in that, The first microchannel structure includes a first channel (11) extending along the first direction to both ends of the first heat exchange plate (1), the second microchannel structure includes a second channel (21) extending along the vertical direction to both ends of the second heat exchange plate (2), and the second channels (21) of the plurality of second heat exchange plates (2) arranged along the first direction are all connected to the first channel (11), and the third microchannel structure includes a third channel (41) extending along the vertical direction to both ends of the heat dissipation fins (4), and the third channels (41) of the plurality of heat dissipation fins (4) arranged along the first direction are all connected to the first channel (11).

6. The battery water-cooling plate according to claim 5, characterized in that, The first channel (11) and the second channel (21) are arranged at equal intervals along the second direction. The multiple second channels (21) are respectively connected to the multiple first channels (11). The third channels (41) of the multiple heat dissipation fins (4) arranged along the second direction are respectively connected to the multiple first channels (11).

7. The battery water-cooling plate according to claim 5, characterized in that, The first microchannel structure also includes a plurality of fourth channels (12) extending along the second direction to both ends of the first heat exchange plate (1). The plurality of fourth channels (12) are perpendicularly intersecting and connected to the first channel (11). The second channels (21) of the plurality of second heat exchange plates (2) arranged along the first direction are respectively connected to the plurality of fourth channels (12). Each fourth channel (12) is connected to the third channel (41) of the plurality of heat dissipation fins (4) arranged along the second direction.

8. The battery water-cooling plate according to claim 7, characterized in that, The first microchannel structure also includes multiple fifth channels (13), each of which is perpendicularly connected to the first channel (11). The third channels (41) of the multiple heat dissipation fins (4) arranged along the first direction are respectively connected to the multiple fourth channels (12) / fifth channels (13). Each fifth channel (13) is connected to the third channel (41) of the multiple heat dissipation fins (4) arranged along the second direction.

9. The battery water-cooling plate according to claim 8, characterized in that, The first microchannel structure also includes multiple sixth channels (14) and multiple seventh channels (15). The multiple sixth channels (14) are respectively arranged on the lower side of multiple fifth channels (13). The sixth channels (14) are connected to the corresponding fifth channels (13) through multiple seventh channels (15).

10. The battery water-cooling plate according to claim 9, characterized in that, The first heat exchange plate (1) is provided with a metal foam layer (16), which is in close contact with the top surface of the battery pack (3).

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