Liquid cooling plate, vehicle-mounted charger and new energy automobile
By setting up a uniform temperature channel and filling it with a phase change working fluid inside the liquid cooling plate, the problem of poor heat dissipation of existing liquid cooling plates is solved, achieving more efficient heat diffusion and conduction, and improving the overall heat dissipation performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU INOSA UNITED POWER SYST CO LTD
- Filing Date
- 2025-04-18
- Publication Date
- 2026-05-19
AI Technical Summary
Existing harmonica tube-type liquid cooling plates have thin walls, resulting in poor heat dissipation from the heat dissipation surface. This leads to localized hot spots directly below the heat-generating components, affecting the overall heat dissipation efficiency of the liquid cooling plate.
Multiple cooling channels are set inside the liquid cooling plate, and a uniform temperature channel is set between adjacent cooling channels. The uniform temperature channel is filled with a phase change working fluid. The phase change process of the phase change working fluid is used to diffuse and transfer heat, and heat exchange is carried out through the refrigerant in the cooling channel, thereby increasing the heat exchange area and reducing the thermal resistance.
It improves the heat dissipation efficiency of the liquid cooling plate, reduces thermal resistance, enhances the diffusion and conduction of local heat, and improves the overall heat dissipation effect.
Smart Images
Figure CN224256464U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of liquid cooling technology, and in particular to a liquid cooling plate, an on-board charger, and a new energy vehicle. Background Technology
[0002] Currently, on-board chargers (OBCs) use harmonica tubes as liquid cooling plates to dissipate heat from the power components. However, existing harmonica tube-type liquid cooling plates have thin walls, resulting in poor heat dissipation and the formation of localized hot spots directly beneath the heat-generating components, thus affecting the overall heat dissipation efficiency of the liquid cooling plate. Utility Model Content
[0003] The main purpose of this utility model is to propose a liquid cooling plate, an on-board charger, and a new energy vehicle, aiming to improve the overall heat dissipation efficiency of the liquid cooling plate.
[0004] To achieve the above objectives, this utility model proposes a liquid cooling plate, which has multiple cooling channels, an inlet connected to one end of the multiple cooling channels, and an outlet connected to the other end of the multiple cooling channels. The liquid cooling plate also includes at least one uniform temperature channel opened between two adjacent cooling channels for achieving local heat distribution, and the uniform temperature channel is filled with a phase change working fluid.
[0005] In one embodiment, each of the cooling channels extends along the length direction of the liquid cooling plate, and the plurality of cooling channels are arranged at intervals along the height direction of the liquid cooling plate.
[0006] The projection of each of the temperature equalization channels along the width direction of the liquid cooling plate is located between two adjacent cooling channels.
[0007] In one embodiment, the liquid cooling plate has a first side and a second side disposed opposite to each other in the width direction, and a plurality of cooling channels are disposed between the first side and the second side;
[0008] The temperature equalization channel is disposed between the cooling channel and the first side; and / or, the temperature equalization channel is disposed between the cooling channel and the second side.
[0009] In one embodiment, each of the temperature equalization channels extends along the length of the liquid cooling plate, and both ends of each temperature equalization channel are sealed.
[0010] In one embodiment, the phase change working fluid is acetone, refrigerant R134a, or refrigerant R1233zd.
[0011] In one embodiment, the liquid cooling plate is bent to form a first side plate, a connecting plate, and a second side plate, and the first side plate, the connecting plate, and the second side plate together form a mounting groove.
[0012] In one embodiment, the liquid cooling plate is configured as a single piece.
[0013] This utility model also proposes an on-board charger, including a liquid cooling plate as described in any of the above embodiments;
[0014] A power module is mounted on the liquid cooling plate, and the temperature equalization channel is located between the power module and the cooling channel.
[0015] In one embodiment, the on-board charger further includes a thermally conductive insulating layer disposed between the power module and the liquid cooling plate;
[0016] And / or, each of the temperature equalization channels is at least partially located within the projection of the power module along the width direction of the liquid cooling plate.
[0017] This utility model also proposes a new energy vehicle, including an on-board charger as described in any of the above embodiments.
[0018] The uniform temperature channel set on the liquid cooling plate in the technical solution of this utility model can extend the heat along the cavity of the uniform temperature channel when local heating occurs, so that the heat diffusion and conduction effect is better. Then the diffused and conducted heat exchanges with the refrigerant in the cooling channel through the inner wall surface between the heat and the cooling channel. Finally, the heat is carried out of the liquid cooling plate by the refrigerant, thus improving the overall heat dissipation efficiency of the liquid cooling plate. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0020] Figure 1 A schematic diagram of the structure of an embodiment of the liquid cooling plate provided by this utility model;
[0021] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the liquid cooling plate;
[0022] Figure 3 Simulation cloud map of liquid cooling plate provided for this utility model.
[0023] Explanation of icon numbers:
[0024] 100. Liquid cooling plate; 100a. First side panel; 100b. Second side panel; 101. First side plate; 102. Connecting plate; 103. Second side plate; 104. Cooling channel; 105. Temperature equalization channel; 110. Diverter pipe; 120. Manifold pipe;
[0025] 200. Power module; 210. Thermally conductive insulation layer.
[0026] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0027] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0028] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0030] Currently, on-board chargers (OBCs) use harmonica tubes as liquid cooling plates to dissipate heat from the power components. However, existing harmonica tube-type liquid cooling plates have thin walls, resulting in poor heat dissipation and the formation of localized hot spots directly beneath the heat-generating components, thus affecting the overall heat dissipation efficiency of the liquid cooling plate.
[0031] This utility model proposes a liquid cooling plate 100.
[0032] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the liquid cooling plate 100 has a plurality of cooling channels 104 and a liquid inlet connected to one end of the plurality of cooling channels 104 and a liquid outlet connected to the other end of the plurality of cooling channels 104. The liquid cooling plate 100 further includes at least one uniform temperature channel 105 opened between two adjacent cooling channels 104 for realizing local heat distribution. The uniform temperature channel 105 is filled with a phase change working fluid.
[0033] The technical solution of this utility model involves providing multiple cooling channels 104 for refrigerant circulation inside the liquid cooling plate 100, as well as an inlet connected to one end of the cooling channel 104 and an outlet connected to the other end of the cooling channel 104. The inlet and outlet can be directly connected to the heat exchange equipment or connected to the heat exchange equipment through connecting pipes, thereby forming a circulating heat exchange system. In this embodiment, the inlet is used to supply refrigerant from the heat exchange equipment into the cooling channel 104. When the refrigerant flows through the cooling channel 104, it will exchange heat with the liquid cooling plate 100. After the heat exchange is completed, the refrigerant returns to the cooling equipment through the outlet.
[0034] Since the liquid cooling plate 100 is used in conjunction with other devices that require heat dissipation, such as adding devices on the liquid cooling plate 100, and the devices achieve heat dissipation through the liquid cooling plate 100, the contact area between the device and the liquid cooling plate 100 is small, which makes it difficult for the device to achieve heat dissipation through the liquid cooling plate 100.
[0035] To solve the above-mentioned technical problems, in this embodiment, at least one temperature equalization channel 105 is provided inside the liquid cooling plate 100. The temperature equalization channel 105 is located between two adjacent cooling channels 104. The temperature equalization channel 105 is filled with a phase change working fluid. When the phase change working fluid is affected by external heat in a local area of the temperature equalization channel 105, a portion of the phase change working fluid in the temperature equalization channel 105 will undergo a phase change. The latent heat of vaporization is rapidly absorbed and transferred, and the heat diffuses in the temperature equalization channel 105 along the opening direction of the temperature equalization channel 105. Since the pressure of the gaseous phase change working fluid is greater than that of the liquid phase change working fluid, the gaseous phase change working fluid will flow along the cavity of the temperature equalization channel 105 to the liquid phase change working fluid with lower pressure. At this time, the gaseous phase change working fluid will undergo a first heat exchange with the liquid phase change working fluid. In this way, the temperature equalization channel 105 can diffuse the local heat through the cavity of the temperature equalization channel 105. The diffused heat then undergoes a second heat exchange with the refrigerant flowing in the cooling channel 104 through the inner wall surface. When the device exchanges heat with the cooling channel 104 through the temperature equalization channel 105, the adjacent proximity of the temperature equalization channel 105 and the cooling channel 104 increases the heat exchange area between them, reducing the thermal resistance and resulting in faster and more efficient heat exchange. With this configuration, the temperature equalization channel 105 can extend heat along its cavity when locally heated, improving heat diffusion and conduction. The diffused heat then exchanges heat with the refrigerant within the cooling channel 104 through the inner wall surface between the device and the cooling channel 104. Finally, the heat is carried out of the liquid cooling plate 100 by the refrigerant, thus improving the overall heat dissipation efficiency of the liquid cooling plate 100.
[0036] It is understandable that there can be one or more uniform temperature channels 105, and the specific number of uniform temperature channels 105 can be laid according to the actual situation.
[0037] In one embodiment, each of the cooling channels 104 extends along the length direction of the liquid cooling plate 100, and a plurality of cooling channels 104 are arranged at intervals along the height direction of the liquid cooling plate 100; the projection of each temperature equalization channel 105 along the width direction of the liquid cooling plate 100 is located between two adjacent cooling channels 104. Figure 2As shown, for example, considering the thin wall thickness of the liquid cooling plate 100, in order to set up a temperature equalization channel 105 in the liquid cooling plate 100 without increasing the wall thickness of the liquid cooling plate 100, when the distance between two adjacent cooling channels 104 is large, the temperature equalization channel 105 is set between the two adjacent cooling channels 104 and located on the same side of the two adjacent cooling channels 104, that is, closer to the device that needs heat dissipation relative to the cooling channels 104. When the distance between two adjacent cooling channels 104 is small, since the cross-section of the cooling channel 104 along the height direction of the liquid cooling plate 100 is generally circular, there will be a large area between the two adjacent cooling channels 104. Therefore, the temperature equalization channel 105 can be set in this area. At this time, the projection of the temperature equalization channel 105 along the width direction of the liquid cooling plate 100 is located between the two adjacent cooling channels 104, and at least partially falls on at least one of the two adjacent cooling channels 104. With such a setting, the heat dissipation effect of the liquid cooling plate 100 can be improved without increasing the wall thickness of the liquid cooling plate 100.
[0038] In one embodiment, the liquid cooling plate 100 includes a first side surface 100a and a second side surface 100b that are opposite each other along its width direction, and the width direction of the liquid cooling plate 100 is... Figure 1 In the middle, Y points in the direction, and the width direction also refers to the direction from the opposite first side 100a to the second side 100b. Multiple heat equalization channels 105 are located between the cooling channel 104 and the first side 100a, or between the cooling channel 104 and the second side 100b, or between the cooling channel 104 and the first side 100a and the second side 100b. For example, if the device that needs to dissipate heat is located on the first side 100a, then the heat equalization channel 105 is located between the first side 100a and the cooling channel 104. Or if the device that needs to dissipate heat is located on the second side 100b, then the heat equalization channel 105 is located between the second side 100b and the cooling channel 104. Alternatively, if both the first side 100a and the second side 100b have devices that need to dissipate heat, then heat equalization channels 105 can be set between the first side 100a and the second side 100b and the cooling channel 104 respectively. No further limitations are imposed on this. In this embodiment, two adjacent temperature equalization channels 105 are arranged at intervals in order to enable the temperature equalization channel 105 to better conduct heat outward in a diffuse manner after exchanging heat with the outside, and then achieve a better heat exchange effect with the cooling channel 104 to achieve the purpose of heat dissipation.
[0039] Regarding the opening of the temperature equalization channel 105, it can be arranged to extend along the length direction of the liquid cooling plate 100 or along the height direction of the liquid cooling plate 100. The length direction of the liquid cooling plate 100 is as follows: Figure 1As shown in the X direction, this length direction is the direction indicated when the liquid cooling plate 100 is not processed. The height direction of the liquid cooling plate 100 is as follows: Figure 1 As shown in the Z direction, no further restrictions are placed on the specific settings of the temperature equalization channel 105.
[0040] Regarding the inlet and outlet, in one embodiment, to ensure that the refrigerant can better enter the cooling channel 104 through the inlet and better exit the cooling channel 104 through the outlet, such as... Figure 1 As shown, in this embodiment, a distribution pipe 110 is connected to the liquid inlet, and a collection pipe 120 is connected to the liquid outlet. After the refrigerant completes heat exchange in the cooling equipment, it can flow through the distribution pipe 110 to the liquid inlet, then into the cooling channel 104, and finally through the liquid outlet to the collection pipe 120. The refrigerant that has completed heat exchange is collected at the collection pipe 120 and circulated back into the cooling equipment for reuse. Of course, in other embodiments, the liquid inlet and outlet can also be connected to the cooling equipment through independent pipes; this is not a limitation. When there are multiple cooling channels 104, the distribution pipe 110 can evenly distribute the refrigerant, while the collection pipe 120 can collect it. The connection method between the distribution pipe 110 and the collection pipe 120 and the liquid cooling plate 100 can be sealed adhesive bonding, welding, or a sealant can be added between the two and then connected by threads; this is not a limitation either.
[0041] In one embodiment, each of the temperature equalization channels 105 extends along the length direction of the liquid cooling plate 100, and the plurality of temperature equalization channels 105 are spaced apart along the height direction of the liquid cooling plate 100. To simplify the process of integrally molding the liquid cooling plate 100, in this embodiment, each temperature equalization channel 105 can extend along the length direction of the liquid cooling plate 105, and the plurality of temperature equalization channels 105 can be spaced apart along the height direction of the liquid cooling plate 100. In this embodiment, the height direction of the liquid cooling plate 100 refers to... Figure 1 As shown in the Z direction, the uniform temperature channel 105, when configured in this way, facilitates the simultaneous molding of the cooling channel 104 during the integral molding of the liquid cooling plate 100, making the molding process simpler.
[0042] In one embodiment, each of the temperature equalization channels 105 extends along the length direction of the liquid cooling plate 100, and both ends of each temperature equalization channel 105 are sealed. For example, the temperature equalization channel 105 may include at least one channel opening and a number of sealing caps matching the number of channel openings, the sealing caps being used to seal the channel openings. The temperature equalization channel 105 may be formed in the same manner as the cooling channel 104, where the temperature equalization channel 105 is formed by extruding the liquid cooling plate 100 to form a temperature equalization cavity, and then sealing the channel openings at both ends of the temperature equalization cavity to form the temperature equalization channel 105. Alternatively, the temperature equalization channel 105 may be formed by extruding the liquid cooling plate 100 to form a temperature equalization cavity with an opening at one end, and then sealing the opening with a sealing cap, thus forming the temperature equalization channel 105. The specific forming of the temperature equalization channel 105 is not limited in detail.
[0043] In one embodiment, the phase change working fluid is acetone, refrigerant R134a, or refrigerant R1233zd. In this embodiment, the phase change working fluid can be acetone, refrigerant R134a, or refrigerant R1233zd; no further limitations are imposed.
[0044] In one embodiment, such as Figure 1 As shown, the liquid cooling plate 100 is bent to form a first side plate 101, a connecting plate 102, and a second side plate 103. The first side plate 101, the connecting plate 102, and the second side plate 103 enclose a mounting groove. To enable the liquid cooling plate 100 to adapt to different assembly situations, in this embodiment, the liquid cooling plate 100 is bent to form the first side plate 101, the connecting plate 102, and the second side plate 103. The first side plate 101 and the second side plate 103 are located at both ends of the connecting plate 102, and the first side plate 101, the connecting plate 102, and the second side plate 103 enclose a mounting groove, which facilitates the assembly of the liquid cooling plate 100. Of course, in other embodiments, the liquid cooling plate 100 can also be bent as needed to adapt to different assembly relationships.
[0045] In one embodiment, the liquid cooling plate 100 is integrally formed. In this embodiment, the liquid cooling plate 100 is formed by integral extrusion molding, wherein the cooling channel 104 and the temperature equalization channel 105 provided in the liquid cooling plate 100 are both formed by extrusion molding. The liquid cooling plate 100 configured in this way has a simple structure and reliable process.
[0046] This utility model also proposes an on-board charger, which includes a liquid cooling plate 100 and a power module 200. The specific structure of the liquid cooling plate 100 is as described in the above embodiments. Since this on-board charger adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The power module 200 is disposed on the liquid cooling plate 100, and the temperature equalization channel 105 is located between the power module 200 and the cooling channel 104. In one embodiment, as... Figure 2 As shown, in this embodiment, the liquid cooling plate 100 is used in an on-board charger, which includes a power module 200. The power module 200 is disposed on the first side 100a or the second side 100b of the liquid cooling plate 100, and the temperature equalization channel 105 is disposed between the power module 200 and the cooling channel 104. When the on-board charger is put into use, the power module 200 will generate heat. In order to dissipate heat from the power module 200, the cooling device in the above embodiment will be activated and will push the refrigerant to flow through the cooling channel 104 in the liquid cooling plate 100. Since the power module 200 cannot completely cover the first side 100a or the second side 100b of the liquid cooling plate 100, the liquid cooling plate 100 can only dissipate heat from the power module 200 through the local part in contact with the power module 200, resulting in poor overall heat dissipation effect of the liquid cooling plate 100. In this embodiment, the temperature equalization channel 105 is arranged on the side of the cooling channel 104 close to the power module 200. In this way, when the power module 200 heats up, the temperature equalization channel 105 can diffuse heat through the cavity, thereby indirectly increasing the heat exchange area between the power module 200 and the cooling channel 104, thus making the heat exchange effect of the liquid cooling plate 100 better.
[0047] In one embodiment, the on-board charger further includes a thermally conductive insulating layer disposed between the power module 200 and the liquid cooling plate 100; and / or, each of the temperature equalization channels 105 is at least partially located within the projection of the power module 200 along the width direction of the liquid cooling plate 100. To prevent leakage, in this embodiment, a thermally conductive insulating layer is also added between the power module 200 and the liquid cooling plate 100. This thermally conductive insulating layer is an alumina ceramic sheet. The power module 200 is connected to the thermally conductive insulating layer via thermally conductive adhesive, and the thermally conductive insulating layer is also connected to the liquid cooling plate 100 via thermally conductive adhesive. The thermal conductivity of the thermally conductive insulating layer is 1.5 W / mK, and its thickness is 100 μm. In this embodiment, as... Figure 2 As shown, in order to make the liquid cooling plate 100 integral molding simpler, multiple temperature equalization channels 105 are placed in the projection formed by the power module 200 and the liquid cooling plate 100 in the width direction of the liquid cooling plate 100. In this way, the temperature equalization channels 105 can be reasonably opened according to the actual situation of the power module 200.
[0048] In one embodiment, such as Figure 3 As illustrated, in this embodiment, assuming the refrigerant flowing through the cooling channel 104 is a 50% ethylene glycol-water mixture by volume, with an inlet temperature of 65°C and a flow rate of 8L / min, a heat loss of 80W for a single power module 200, and a thermally conductive insulating layer of 0.8mm alumina ceramic sheet, the surface temperature of the liquid cooling plate 100, which is directly below the power module 200, is 77.8°C, and the junction temperature of the power module 200 is 143°C. Compared to a conventional liquid cooling plate 100, the surface temperature rise of the liquid cooling plate 100 is reduced from 22°C to 12.8°C, and the thermal resistance of the liquid cooling plate 100 is reduced by approximately 40%. The temperature equalization channel 105 allows the local heat of the power module 200 to be evenly distributed, improving the heat dissipation effect in the non-power module 200 installation area, and significantly improving the overall heat dissipation effect.
[0049] This utility model also proposes a new energy vehicle, which includes the on-board charger described above.
[0050] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A liquid-cooled plate, the liquid-cooled plate having a plurality of cooling channels and a liquid inlet communicating with one end of the plurality of cooling channels and a liquid outlet communicating with the other end of the plurality of cooling channels, characterized in that, The liquid cooling plate also includes at least one uniform temperature channel formed between two adjacent cooling channels for achieving local heat distribution, and the uniform temperature channel is filled with a phase change working fluid.
2. The liquid cooling plate as described in claim 1, characterized in that, Each of the cooling channels extends along the length of the liquid cooling plate, and the plurality of cooling channels are arranged at intervals along the height of the liquid cooling plate; The projection of each of the temperature equalization channels along the width direction of the liquid cooling plate is located between two adjacent cooling channels.
3. The liquid cooling plate as described in claim 1, characterized in that, The liquid cooling plate has a first side and a second side that are arranged opposite to each other along the width direction, and a plurality of cooling channels are disposed between the first side and the second side. The temperature equalization channel is disposed between the cooling channel and the first side; and / or, the temperature equalization channel is disposed between the cooling channel and the second side.
4. The liquid cooling plate as described in claim 1, characterized in that, Each of the temperature equalization channels extends along the length of the liquid cooling plate, and both ends of each temperature equalization channel are sealed.
5. The liquid cooling plate as described in claim 1, characterized in that, The phase change working fluid is acetone, refrigerant R134a, or refrigerant R1233zd.
6. The liquid-cooled plate according to any one of claims 1 to 5, characterized in that, The liquid cooling plate is bent to form a first side plate, a connecting plate, and a second side plate, which together form an installation groove.
7. The liquid cooling plate as described in claim 6, characterized in that, The liquid cooling plate is configured as a single piece.
8. An on-board charger, characterized in that, include: The liquid cooling plate as described in any one of claims 1 to 7; A power module is mounted on the liquid cooling plate, and the temperature equalization channel is located between the power module and the cooling channel.
9. The on-board charger as described in claim 8, characterized in that, The on-board charger also includes a thermally conductive insulating layer, which is disposed between the power module and the liquid cooling plate; And / or, each of the temperature equalization channels is at least partially located within the projection of the power module along the width direction of the liquid cooling plate.
10. A new energy vehicle, characterized in that, Includes the on-board charger as described in claim 8 or 9.