Liquid cooling and air cooling integrated heat dissipation device

Abstract

The utility model relates to the technical field of heat dissipation devices, and discloses a liquid cooling and air cooling integrated heat dissipation device which comprises a liquid cooling plate and an air cooling assembly, and the liquid cooling plate is internally provided with a cooling channel filled with cooling liquid; a heat dissipation surface is arranged on the liquid cooling plate; the air cooling assembly is arranged at the position, close to the heat dissipation face, of the liquid cooling plate. The battery pack has the effect of conveniently dissipating heat of the battery pack through the liquid cooling plate.

Description

Technical Field

[0001] This application relates to the field of heat dissipation device technology, and in particular to a liquid-cooled and air-cooled integrated heat dissipation device. Background Technology

[0002] In the field of new energy vehicles, high-voltage power batteries, such as lithium-ion batteries, are typically used to provide power to the drive motor and the vehicle's high-voltage system. During the charging and discharging process of the battery, its internal resistance generates heat, especially during rapid charging and discharging or in high-temperature environments, where the heat generation is more significant. This not only affects the battery's performance and lifespan but may also pose safety hazards.

[0003] Currently, power supply cooling mainly employs two methods: air cooling and water cooling. Air cooling technology removes heat through natural convection or forced fans. Its advantages include simple structure, low cost, and no need for coolant, eliminating the risk of liquid leakage. However, its disadvantages include relatively low heat dissipation efficiency, difficulty in handling high loads or high-temperature environments, and a tendency to cause uneven battery temperatures, which in turn affects battery consistency and overall performance.

[0004] Water cooling technology uses a circulating coolant (such as a glycol mixture) to flow through the internal pipes of the battery pack, absorbing and dissipating heat. Its heat dissipation efficiency is relatively higher than air cooling, and it can more effectively handle the heat dissipation requirements under high load and high temperature environments, ensuring uniform battery temperature. However, water cooling systems also have some drawbacks. In particular, the coolant connections are generally detachable, making leaks prone to occur. This can not only lead to short circuits and other malfunctions within the battery pack, but also increase system complexity and maintenance costs. Utility Model Content

[0005] To facilitate heat dissipation of the battery pack through a liquid cooling plate, this application provides an integrated liquid-cooled and air-cooled heat dissipation device.

[0006] The liquid-cooled and air-cooled integrated heat dissipation device provided in this application adopts the following technical solution:

[0007] A liquid-cooled and air-cooled integrated heat dissipation device includes a liquid cooling plate and an air-cooling assembly, wherein:

[0008] The liquid cooling plate has cooling channels filled with coolant inside.

[0009] The liquid cooling plate is provided with a heat dissipation surface;

[0010] The air-cooling component is located on the liquid-cooled plate near the heat dissipation surface.

[0011] Optionally, the liquid cooling plate is provided with an overall flow guide pipe and local flow guide pipes;

[0012] The overall guide pipe connects the two ends of the cooling channel;

[0013] Both ends of the local guide tube are connected to the interior of the cooling channel, and the liquid outlet end of the local guide tube is located upstream of the heat source.

[0014] Pumps are installed on both the overall flow guide pipe and the local flow guide pipe.

[0015] Optionally, the overall guide tube is placed on the overall mounting plate;

[0016] The local guide tube is placed on the local mounting plate;

[0017] The surfaces of the overall mounting plate and the partial mounting plate form a heat dissipation surface.

[0018] Optionally, the air-cooling component includes a fan;

[0019] Fans are provided on both the overall mounting plate and the partial mounting plate.

[0020] Optionally, the side of the liquid cooling plate away from the heat source is sealed with an annular enclosure;

[0021] The enclosure is equipped with an air-to-air heat exchanger;

[0022] The liquid cooling plate, the enclosure, and the air-to-air heat exchanger form a heat dissipation cavity;

[0023] Cold air is introduced into the airflow box that is connected to the first heat dissipation zone on the air-to-air heat exchanger.

[0024] The second heat dissipation strip on the air-to-air heat exchanger is placed inside the heat dissipation cavity.

[0025] Optionally, a supporting heat-conducting plate is provided between the overall mounting plate or the partial mounting plate and the liquid cooling plate;

[0026] The supporting heat-conducting plate is arranged in an incline shape.

[0027] Optionally, the opening of the supporting heat-conducting plate is positioned on the side away from the liquid cooling plate.

[0028] Optionally, the parallel surfaces of the supporting heat-conducting plates are parallel to the liquid cooling plates.

[0029] Optionally, the side of the liquid cooling plate away from the heat source is sealed with an annular enclosure;

[0030] The enclosure is equipped with an air-to-air heat exchanger;

[0031] The liquid cooling plate, the enclosure, and the air-to-air heat exchanger form a heat dissipation cavity;

[0032] Cold air is introduced into the airflow box that is connected to the first heat dissipation zone on the air-to-air heat exchanger.

[0033] The second heat dissipation strip on the air-to-air heat exchanger is placed inside the heat dissipation cavity.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. The integrated liquid-cooled and air-cooled heat dissipation device effectively reduces the battery pack temperature through the synergistic effect of liquid and air cooling. The cooling channels inside the liquid cooling plate have a serpentine structure, where the coolant distributes heat evenly to the heat dissipation surface through its flow. The air-cooling components dissipate heat from the heat dissipation surface, the overall airflow pipes, and local airflow pipes via fans. The combined design of large and small circulating cooling channels not only dissipates heat from the overall liquid cooling plate but also provides a rapid response when local temperatures are too high, reducing heat accumulation, ensuring uniform temperature distribution within the battery pack, and improving heat dissipation efficiency and temperature control.

[0036] 2. The device utilizes the natural airflow during vehicle operation for heat dissipation, reducing reliance on additional energy sources. Through the design of an air-to-air heat exchanger and a cooling cavity, the airflow from the vehicle's operation directly enters the airflow box, lowering the internal temperature of the cooling cavity and simultaneously dissipating heat from the battery pack. This design not only reduces energy consumption for heat dissipation but also simplifies the device structure, improves maintenance convenience, and reduces the risk of coolant leakage through sealed welding and a one-piece molding design, further enhancing the device's reliability and safety.

[0037] 3. The design of the supporting heat-conducting plate and the heat dissipation cavity significantly increases the heat dissipation area while also protecting the battery pack. The supporting heat-conducting plate, through contact with the liquid cooling plate, transfers and diffuses heat over a larger area, improving heat dissipation efficiency. The heat dissipation cavity not only protects the battery pack from external environmental influences but also utilizes natural airflow to lower the internal temperature, further optimizing heat dissipation. Through structural optimization and material selection, the device enhances overall stability and protection capabilities while ensuring heat dissipation performance. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0039] Figure 2 This is a schematic diagram illustrating the heat dissipation cavity in Embodiment 3 of this application.

[0040] Figure 3 This is a schematic diagram illustrating the airflow box in Embodiment 3 of this application.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Liquid cooling plate; 11. Overall flow guide pipe; 12. Local flow guide pipe; 13. Overall mounting plate; 14. Local mounting plate; 15. Supporting heat conduction plate; 16. Enclosure; 17. Heat dissipation cavity; 2. Fan; 3. Air-to-air heat exchanger; 31. Airflow box. Detailed Implementation

[0043] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0044] This application discloses a liquid-cooled and air-cooled integrated heat dissipation device.

[0045] Example 1

[0046] A liquid-cooled and air-cooled integrated heat dissipation device includes a liquid-cooled plate 1 and an air-cooling assembly. The liquid-cooled plate 1 has internal cooling channels arranged in a serpentine structure, and coolant is contained within the cooling channels; in this embodiment, the coolant is water. One side of the liquid-cooled plate 1 is in contact with a heat source, and the other side has a heat dissipation surface. The air-cooling assembly is installed on the liquid-cooled plate 1 near the heat dissipation surface.

[0047] The heat generated by the battery pack is transferred to the liquid cooling plate 1, and then from the liquid cooling plate 1 to its heat dissipation surface. During this heat transfer, the coolant inside the cooling channels not only exchanges heat with the battery pack, but also, through its flow properties, facilitates the even distribution of heat to the heat dissipation surface of the liquid cooling plate 1. The air-cooled components dissipate heat from the heat dissipation surface of the liquid cooling plate 1, thereby cooling the battery pack through the liquid cooling plate 1.

[0048] The liquid cooling plate 1 is provided with a general flow guide pipe 11 and a local flow guide pipe 12. The general flow guide pipe 11 connects to both ends of the cooling channel, and both ends of the local flow guide pipe 12 are connected to the interior of the cooling channel, and the liquid outlet end of the local flow guide pipe 12 is located upstream of the heat source.

[0049] The overall guide pipe 11 and the cooling channel form a large circulating cooling channel. The coolant flows in the large circulating cooling channel, and the flowing coolant transfers heat to various parts of the liquid cooling plate 1. The air-cooled assembly dissipates heat from the overall guide pipe 11 to reduce the temperature of the coolant, thereby reducing the temperature of the battery pack.

[0050] The local guide pipe 12 and the cooling channel form a small-circulation cooling channel. The heat generated by the battery pack is uneven, with some areas experiencing relatively high temperatures. Because the outlet of the local guide pipe 12 is located upstream of this localized area, the coolant has a shorter flow path within the small-circulation cooling channel. After the air-cooled components dissipate heat from the local guide pipe 12, the cooled coolant can be quickly returned to the heat source to further cool it.

[0051] The large-circulation cooling channel is mainly used to dissipate heat and cool the coolant in the overall liquid cooling plate 1, controlling the temperature of the liquid cooling plate 1 and the battery pack. When the local temperature of the battery pack is too high, the small-circulation cooling channel is activated to assist in rapid heat dissipation. At the same time, the coolant flows intermittently inside the small-circulation cooling channel to reduce heat accumulation and reduce the overall temperature rise of the coolant, thus avoiding affecting other areas of the battery pack with lower temperatures.

[0052] To reduce the possibility of coolant leakage, both the overall guide pipe 11 and the local guide pipe 12 are sealed and welded to the liquid cooling plate 1.

[0053] To facilitate the flow of coolant between the large and small circulation cooling channels, pumps are installed on both the overall guide pipe 11 and the local guide pipe 12. The pumps accelerate the flow of coolant inside the large and small circulation cooling channels, thereby improving the heat dissipation effect.

[0054] To facilitate the dissipation of coolant inside the overall guide tube 11 and the local guide tube 12, an overall mounting plate 13 and a local mounting plate 14 are provided on the liquid cooling plate 1. The overall guide tube 11 is placed inside the overall mounting plate 13, and the local guide tube 12 is placed inside the local mounting plate 14.

[0055] To further reduce the possibility of coolant leakage, the pump is installed inside the overall mounting plate 13 and the partial mounting plate 14, and is integrally formed with the overall mounting plate 13 and the partial mounting plate 14.

[0056] The air-cooled assembly includes a fan 2, which is mounted on the overall mounting plate 13 and the local mounting plate 14. The fan 2 drives airflow to dissipate heat from the overall airflow duct 11, the local airflow duct 12, and the heat dissipation surface of the liquid cooling plate 1.

[0057] The overall mounting plate 13 and the partial mounting plate 14 are connected by a supporting heat-conducting plate 15. The supporting heat-conducting plate 15 is U-shaped. In this embodiment, the parallel surfaces of the supporting heat-conducting plate 15 are parallel to the liquid cooling plate 1, and the surface closest to the liquid cooling plate 1 is in contact with the liquid cooling plate 1. A portion of the heat on the liquid cooling plate 1 is transferred to the supporting heat-conducting plate 15. By increasing the heat dissipation surface through the supporting heat-conducting plate 15, the heat dissipation efficiency of the liquid cooling plate 1 is improved while enhancing the overall mounting plate 13.

[0058] The installation method of the partial mounting plate 14 and the liquid cooling plate 1 is the same as the installation method of the overall mounting plate 13 and the liquid cooling plate 1.

[0059] The implementation principle of the liquid-cooled and air-cooled integrated heat dissipation device in Embodiment 1 of this application is as follows: Heat is transferred to the cooling channels inside the liquid-cooled plate 1 through contact with the heat source. The cooling channels have a serpentine structure and are filled with coolant (such as water). The coolant, through its flow, evenly transfers heat to the heat dissipation surface of the liquid-cooled plate 1. The overall guide pipe 11 and the local guide pipe 12 form a large-circulation cooling channel and a small-circulation cooling channel, respectively. The large-circulation cooling channel is used for overall heat dissipation, while the small-circulation cooling channel is used for rapid heat dissipation in local high-temperature areas. A pump is installed on the overall guide pipe 11 and the local guide pipe 12 to accelerate the flow of coolant and improve heat dissipation efficiency. The air-cooled components (including the fan 2) are installed on the overall mounting plate 13 and the local mounting plate 14, dissipating heat from the overall guide pipe 11, the local guide pipe 12, and the heat dissipation surface of the liquid-cooled plate 1 through airflow. A supporting heat-conducting plate 15 connects the overall mounting plate 13 and the local mounting plate 14, increasing the heat dissipation area and improving heat dissipation efficiency. Through the synergistic effect of liquid cooling and air cooling, the device can effectively reduce the temperature of the battery pack. At the same time, through sealed welding and one-piece molding design, the possibility of coolant leakage is reduced, ensuring heat dissipation and device reliability.

[0060] Example 2

[0061] The difference between this embodiment 2 and embodiment 1 is that the opening of the supporting heat-conducting plate 15 faces away from the cooling plate, and the overall mounting plate 13 is installed at the opening of the supporting heat-conducting plate 15.

[0062] The implementation principle of the liquid-cooled and air-cooled integrated heat dissipation device in Embodiment 1 of this application is as follows: while ensuring the stability of the supporting heat-conducting plate 15 supporting the overall mounting plate 13, the contact area between the supporting heat-conducting plate 15 and the overall mounting plate 13 is increased, and the area of ​​the heat dissipation surface is further increased, thereby further improving the heat dissipation effect.

[0063] Example 3

[0064] The difference between Embodiment 3 and Embodiment 1 is that an annular enclosure 16 is sealed on the side of the liquid-cooled plate 1 away from the heat source, and an air-to-air heat exchanger 3 is mounted on the enclosure 16. The liquid-cooled plate 1, enclosure 16, and air-to-air heat exchanger 3 together form a heat dissipation cavity 17. In this embodiment, the air-to-air heat exchanger 3 used is prior art, and reference can be made to Chinese Patent No. CN219244351U. Cold air is introduced into the airflow box 31 on the air-to-air heat exchanger 3, which is connected to the first heat dissipation strip. The second heat dissipation strip on the air-to-air heat exchanger 3 is placed inside the heat dissipation cavity 17, and the second heat dissipation strip is in contact with the gas inside the heat dissipation cavity 17.

[0065] In this embodiment, the airflow generated by the vehicle during operation enters the airflow box 31, which is connected to the first heat sink. Since the airflow temperature outside the heat dissipation cavity 17 is lower than that inside, the first and second heat sinks exchange heat through heat exchange fins. Specifically, the airflow generated by the vehicle during operation enters the airflow box 31, which is connected to the first heat sink, thereby reducing the temperature of the first heat sink. The heat-exchanged airflow is then discharged from another airflow box 31, which is connected to the first heat sink, further reducing the temperature of the second heat sink and the interior of the heat dissipation cavity 17. This design, while reducing the risk of coolant leakage, further lowers the temperature of the cooling plate and battery pack.

[0066] Meanwhile, the airflow generated during vehicle operation directly cools the battery pack. The heat dissipation cavity 17 not only protects the battery pack but also reduces energy loss during battery pack cooling. Furthermore, the structure is simple in design and easy to maintain. Through the above design, the liquid-cooled and air-cooled integrated heat dissipation device of this application embodiment can effectively utilize the natural airflow during vehicle operation to achieve efficient heat dissipation, while reducing energy consumption and improving the reliability and ease of maintenance of the device.

[0067] The implementation principle of the liquid-cooled and air-cooled integrated heat dissipation device in Embodiment 3 of this application is as follows: An annular enclosure 16 is sealed on the side of the liquid cooling plate 1 away from the heat source. An air-to-air heat exchanger 3 is installed on the enclosure 16. The liquid cooling plate 1, enclosure 16, and air-to-air heat exchanger 3 together form a heat dissipation cavity 17. During vehicle operation, the airflow enters the airflow box 31, which is connected to the first heat dissipation belt. Because the external airflow temperature of the heat dissipation cavity 17 is lower than the internal temperature, the first and second heat dissipation belts exchange heat through heat exchange plates, reducing the temperature of the second heat dissipation belt and the inside of the heat dissipation cavity 17, thereby reducing the temperature of the cooling plate and the battery pack. Simultaneously, the vehicle's airflow directly dissipates heat to the battery pack, and the heat dissipation cavity 17 reduces heat dissipation energy consumption while protecting the battery pack. The entire device utilizes the vehicle's airflow to achieve efficient heat dissipation, has a simple structure, and is easy to maintain.

[0068] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A liquid-cooled and air-cooled integrated heat dissipation device, characterized in that: The liquid cooling plate (1) and the air cooling assembly are provided, wherein: The liquid cooling plate (1) is internally provided with a cooling channel filled with cooling liquid; The liquid cooling plate (1) is provided with a heat dissipation surface; The air cooling assembly is arranged on the liquid cooling plate (1) close to the heat dissipation surface.

2. The liquid cooling and air cooling integrated heat dissipation device according to claim 1, wherein: The liquid cooling plate (1) is provided with a general flow guide pipe (11) and a local flow guide pipe (12); The general flow guide pipe (11) is connected to both ends of the cooling channel; Both ends of the local flow guide pipe (12) are connected to the inside of the cooling channel, and the liquid outlet end of the local flow guide pipe (12) is located at an upstream position of the heat source; The general flow guide pipe (11) and the local flow guide pipe (12) are both provided with a pump.

3. The liquid cooling and air cooling integrated heat dissipation device according to claim 2, wherein: The general flow guide pipe (11) is arranged on a general mounting plate (13); The local flow guide pipe (12) is arranged on a local mounting plate (14); The plate surfaces of the general mounting plate (13) and the local mounting plate (14) form a heat dissipation surface.

4. The liquid cooling and air cooling integrated heat dissipation device according to claim 3, wherein: The air cooling assembly comprises a fan (2); Both the general mounting plate (13) and the local mounting plate (14) are provided with a fan (2).

5. The liquid cooling and air cooling integrated heat dissipation device according to claim 1, wherein: The liquid cooling plate (1) is provided with a ring-shaped enclosure (16) on the side away from the heat source; The enclosure (16) is provided with an air-to-air heat exchanger (3); The liquid cooling plate (1), the enclosure (16) and the air-to-air heat exchanger (3) form a heat dissipation cavity (17); Cold air is introduced into the air flow box (31) on the air-to-air heat exchanger (3) which is connected to the first heat dissipation belt; The second heat dissipation belt on the air-to-air heat exchanger (3) is arranged inside the heat dissipation cavity (17).

6. The liquid cooling and air cooling integrated heat dissipation device according to claim 3, wherein: Support heat conduction plates (15) are arranged between the general mounting plate (13) or the local mounting plate (14) and the liquid cooling plate (1); The support heat conduction plates (15) are arranged in a shape of a Chinese character.

7. The liquid cooling and air cooling integrated heat dissipation device according to claim 6, wherein: The opening of the support heat conduction plate (15) is arranged on the side away from the liquid cooling plate (1).

8. The liquid cooling and air cooling integrated heat dissipation device according to claim 6, wherein: The parallel plate surfaces of the support heat conduction plates (15) are parallel to the liquid cooling plate (1).

9. The liquid cooling and air cooling integrated heat dissipation device according to claim 1, wherein: The liquid cooling plate (1) is provided with a ring-shaped enclosure (16) on the side away from the heat source; The enclosure (16) is provided with an air-to-air heat exchanger (3); The liquid cooling plate (1), the enclosure (16) and the air-to-air heat exchanger (3) form a heat dissipation cavity (17); Cold air is introduced into the air flow box (31) on the air-to-air heat exchanger (3) which is connected to the first heat dissipation belt; The second heat radiation band on the air-air heat exchanger (3) is arranged inside the heat radiation cavity (17).

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