Heat dissipation structure and vehicle charging device

Abstract

The invention provides a heat dissipation structure, which is suitable for heat dissipation of a vehicle charging device and comprises a cover body, a shell and a flow channel structure. The shell comprises a bottom wall, an inlet end and an outlet end. The cover body is connected to the bottom wall of the shell in a sealing mode. The inlet end and the outlet end are respectively arranged on at least one side wall of the shell. The flow channel structure is arranged in the shell and comprises a first channel and at least one second channel which are communicated with each other. The inlet end is communicated with the first channel. The outlet end is communicated with at least one second channel. The first channel is formed between the bottom wall of the shell and the cover body, and the at least one second channel is erected on the first channel. A vehicle charging device is also provided. Through the combination of the first channel and the second channel which are approximately perpendicular to each other or perpendicular to each other, good heat dissipation of a three-dimensional space is achieved.

Description

Technical Field

[0001] The present invention relates to a heat dissipation structure and a charging device, and in particular to a liquid-cooled heat dissipation structure and a vehicle charging device. Background Art

[0002] High power density on-board chargers (OBC) have become a trend in the automotive electronics market. Since high-power electronic devices such as DC or AC on-board chargers have more complex circuits and mechanical structures and strict heat dissipation requirements, how to improve their heat dissipation performance has become a major challenge. In detail, the heat source in the on-board charger can generally be set on a horizontal plate or a vertical plate to better use the space in the on-board charger and achieve high power density at the same time, but this design has high heat dissipation requirements and requires a highly efficient heat dissipation method, and one of the most efficient heat dissipation methods is liquid cooling.

[0003] In most current liquid-cooled heat dissipation designs, the heat source is usually set on a single cooling plate, and the heat generated by the heat source is taken away by the coolant in the two-dimensional cooling channel in the cooling plate to achieve the heat dissipation effect. For example, CN 213585212U discloses a high-power density on-board charger with a cooling plate. However, the cooling plate belongs to a two-dimensional cooling channel, and the heat dissipation effect is limited. In addition, the coolant inlet and coolant outlet of this cooling plate need to be arranged relatively to each other so that the coolant flows in from one side, passes completely through the area to be dissipated, and then flows out from the other opposite side. If the coolant inlet and the coolant outlet are arranged on the same side, the coolant will not be able to completely cover the area to be dissipated, and the on-board charger often requires the coolant inlet and the coolant outlet to be arranged on the same side of the on-board charger. Therefore, the above design is not suitable for the on-board charger.

[0004] Therefore, how to design a liquid cooling channel that can effectively dissipate heat for high power density electronic devices is the focus of current research. Summary of the invention

[0005] The present invention provides a heat dissipation structure, which has good heat dissipation effect and can effectively save space.

[0006] The present invention provides a vehicle charging device having the above-mentioned heat dissipation structure.

[0007] A heat dissipation structure according to an embodiment of the present invention is suitable for dissipating heat for a vehicle charging device, and includes a cover body, a shell and a flow channel structure. The shell includes a bottom wall, an inlet end and an outlet end. The cover body is sealingly coupled to the bottom wall of the shell. The inlet end and the outlet end are respectively arranged on at least one side wall of the shell. The flow channel structure is arranged in the shell and includes a first channel and at least one second channel that are connected. The inlet end is connected to the first channel. The outlet end is connected to at least one second channel. The first channel is formed between the bottom wall of the shell and the cover body, and at least one second channel is erected on the first channel.

[0008] According to an embodiment of the present invention, the cooling fluid is adapted to flow into the housing from the inlet end, pass through the first channel and the at least one second channel in sequence, and flow out of the housing from the outlet end.

[0009] According to an embodiment of the present invention, the shell further comprises at least two opposite inner side walls, the at least two inner side walls are arranged nearly vertically to the bottom wall, and at least one second channel is formed between the at least two inner side walls.

[0010] According to an embodiment of the present invention, the flow channel structure also includes a connecting space, at least one second channel includes two second channels, the connecting space is connected between the two second channels and the outlet end, and the depth of the connecting space in a direction nearly perpendicular to the bottom wall is greater than the depth of the first channel in the direction.

[0011] According to an embodiment of the present invention, the heat dissipation structure further comprises at least one guide member, wherein the at least one guide member is arc-shaped, disposed on the bottom wall of the housing and located in the first channel.

[0012] According to an embodiment of the present invention, there is a distance between the cover body and the at least one flow guide member.

[0013] According to an embodiment of the present invention, the heat dissipation structure further includes a plurality of protrusions, which protrude from the bottom wall of the housing and are located in the first channel.

[0014] According to an embodiment of the present invention, the inlet port and the outlet port are located on the same side of the housing.

[0015] According to an embodiment of the present invention, a width of at least one second channel is between 4 mm and 5 mm, and a height of at least one second channel is between 40 mm and 60 mm.

[0016] A vehicle charging device according to an embodiment of the present invention includes a heat dissipation structure and at least one heating element. The heat dissipation structure includes a cover body, a shell and a flow channel structure. The shell includes a bottom wall, an inlet end and an outlet end. The cover body is sealingly connected to the bottom wall of the shell. The inlet end and the outlet end are respectively arranged on at least one side wall of the shell. The flow channel structure is arranged in the shell and includes a first channel and at least one second channel that are connected. The inlet end is connected to the first channel. The outlet end is connected to the at least one second channel. The first channel is formed between the bottom wall and the cover body of the shell, and at least one second channel is upright on the first channel. At least one heating element is arranged in the shell. The cooling fluid is suitable for flowing through the flow channel structure to dissipate heat for at least one heating element.

[0017] According to an embodiment of the present invention, the vehicle charging device further comprises an inner side wall and a plate body nearly perpendicular to the bottom wall, at least one heating element is an active electronic element and is disposed on the plate body, the plate body is connected to the inner side wall, the inner side wall is nearly perpendicular to the bottom wall, and the at least one heating element is thermally coupled to the inner side wall through the plate body to at least one second channel

[0018] According to an embodiment of the present invention, the vehicle charging device also includes a plate body parallel or nearly perpendicular to the bottom wall, at least one heating element is a passive electronic element and is configured on the plate body, the plate body is arranged in the shell, and at least one heating element contacts the bottom wall and is thermally coupled to the first channel.

[0019] Based on the above, in the heat dissipation structure of the present invention, when the cooling fluid flows into the flow channel structure, the vehicle charging device can be cooled through the first channel and the second channel. Since the second channel is upright on the first channel, and the first channel and the second channel are located in different planes, the area that can dissipate heat is increased without reducing the power density of the vehicle charging device, and it helps to miniaturize the product. At the same time, the heating element can be freely arranged in the first channel or the second channel, so that the space in the shell can be used more flexibly. More importantly, through the combination of the first channel and the second channel that are nearly perpendicular or perpendicular to each other, the present invention realizes liquid-cooled heat dissipation in three-dimensional space, effectively improving the heat dissipation capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A is a schematic diagram of a vehicle charging device according to an embodiment of the present invention;

[0021] Figure 1B yes Figure 1A A schematic diagram of an exploded view of a vehicle charging device;

[0022] Figure 2 yes Figure 1A A bottom view schematic diagram of a vehicle charging device;

[0023] Figure 3 yes Figure 1AA schematic cross-sectional view of a vehicle charging device along the AA section line;

[0024] Figure 4 yes Figure 1A A schematic cross-sectional view of a vehicle charging device along the BB section line;

[0025] Figure 5 is a bottom view schematic diagram of a vehicle charging device according to another embodiment of the present invention;

[0026] Figure 6 It is a bottom view schematic diagram of a vehicle charging device according to another embodiment of the present invention.

[0027] Description of Reference Numerals

[0028] 10, 10A, 10B: vehicle charging device;

[0029] 100: heat dissipation structure;

[0030] 110: cover;

[0031] 120, 120A, 120B: housing;

[0032] 121: Bottom wall;

[0033] 122: entrance end;

[0034] 123: exit port;

[0035] 124: side wall;

[0036] 1251, 1252, 1253, 1254: medial wall;

[0037] 130: flow channel structure;

[0038] 131, 131A, 131B: first channel;

[0039] 1311, 1311A, 1311B: first area;

[0040] 1312, 1312A, 1312B: second area;

[0041] 1313, 1313B: The third area;

[0042] 132, 132A, 1321, 1321B, 1322, 1322B: second channel;

[0043] 133, 133B: connecting space;

[0044] 134: First gate;

[0045] 135: Second gate;

[0046] 140: flow guide;

[0047] 150: protrusion;

[0048] 200: heating element;

[0049] 201: first heating element;

[0050] 202: second heating element;

[0051] 203: third heating element;

[0052] 204: fourth heating element;

[0053] 210: plate body;

[0054] 211: first plate;

[0055] 212: second plate;

[0056] 213: the third plate;

[0057] 214: the fourth plate;

[0058] 215: main board body;

[0059] AA, BB: section lines;

[0060] C: peripheral;

[0061] G: spacing;

[0062] H: height;

[0063] H1, H2: depth;

[0064] P1: first surface;

[0065] P2: second surface;

[0066] P3: third surface;

[0067] P4: fourth surface;

[0068] S1: first lower surface;

[0069] S2: second lower surface;

[0070] U: upper surface;

[0071] W1, W2, W3, W4: width. DETAILED DESCRIPTION

[0072] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0073] Figure 1A It is a schematic diagram of a vehicle charging device according to an embodiment of the present invention. Figure 1B yes Figure 1A Please refer to the exploded diagram of the vehicle charging device. Figure 1A and Figure 1B The vehicle charging device 10 of this embodiment is, for example, an on-board charger (OBC), which can charge a vehicle battery. The vehicle charging device 10 includes a heat dissipation structure 100. The heat dissipation structure 100 is suitable for liquid cooling of the vehicle charging device 10 to prevent the vehicle charging device 10 from being damaged due to overheating.

[0074] like Figure 1B As shown, the heat dissipation structure 100 includes a cover 110, a shell 120 and a flow channel structure 130. The shell 120 includes a bottom wall 121, at least one side wall 124, an inlet end 122 and an outlet end 123. The cover 110 is sealingly coupled to the bottom wall 121 of the shell 120. Specifically, the bottom wall 121 is recessed in the first lower surface S1 of the shell 120 to form a first surface P1, the upper surface U of the cover 110 is attached to the first surface P1, and the second lower surface S2 of the cover 110 is flush with the first lower surface S1 of the shell 120 to keep the appearance of the heat dissipation structure 100 flat. The periphery C of the cover 110 is welded to the inner edge of the first lower surface S1 of the shell 120 by friction stir welding. The shell 120 and the cover 110 do not need to be melted. The cover 110 can be well fitted to the shell 120 to prevent the cooling fluid from leaking from the periphery C of the cover 110 when the heat dissipation structure 100 is performing liquid cooling.

[0075] The side wall 124 of the housing 120 is connected to the bottom wall 121, and the inlet end 122 and the outlet end 123 are disposed on the side wall 124 and connected to the flow channel structure 130. The flow channel structure 130 is disposed in the housing 120, and includes a communication space 133, a first channel 131 and at least one second channel 132 that are connected. The inlet end 122 is connected to the first channel 131, and the communication space 133 is connected between the second channel 132 and the outlet end 123. The first channel 131 is formed between the bottom wall 121 of the housing 120 and the cover 110. Specifically, the bottom wall 121 also includes a second surface P2, the second surface P2 is recessed in the first surface P1, and the first channel 131 is formed between the second surface P2 and the upper surface U of the cover 110.

[0076] The second channel 132 of this embodiment includes two second channels 1321 and 1322 parallel to each other, but the number of the second channels 132 is not limited thereto. The second channels 1321 and 1322 stand upright on the first channel 131. The plane where the second channels 1321 and 1322 are located (parallel to the YZ plane) is nearly perpendicular or perpendicular to the plane where the first channel 131 is located (parallel to the XY plane), and the angle between the second channels 1321 and 1322 and the first channel 131 is, for example, between 85 degrees and 95 degrees. By designing that the second channels 1321 and 1322 are nearly perpendicular or perpendicular to the first channel 131, the heat absorption of the heat dissipation structure 100 can be extended from a two-dimensional plane (that is, the plane where the first channel 131 is located) to a three-dimensional space, which not only effectively enhances the heat dissipation effect, but also enables the space in the housing 120 to be fully utilized, which is conducive to product miniaturization. The heat dissipation design of this embodiment will be explained in more detail below.

[0077] Figure 2 yes Figure 1A In order to clearly show the flow channel structure, the cover 110 is not shown in FIG. Figure 2 In addition, Figure 2 The bold arrows in the figure schematically show the flow direction of the cooling fluid. Figure 2 In this embodiment, the cooling fluid can flow into the shell 120 from the inlet port 122 , and sequentially pass through the first channel 131 , the second channel 132 , and the connecting space 133 , and finally flow out of the shell 120 from the outlet port 123 .

[0078] In detail, the first channel 131 includes a first area 1311, a second area 1312, and a third area 1313. The first area 1311 is connected between the inlet end 122 and the second area 1312 and is almost perpendicular to the side wall 124. The second area 1312 is connected between the first area 1311 and the third area 1313 and is parallel to the side wall 124. The flow channel structure 130 also includes a first gate 134 and a second gate 135. The first area 1311 is connected to the second channel 1322 through the first gate 134, and the third area 1313 is connected to the second channel 1321 through the second gate 135.

[0079] When the cooling fluid flows into the housing 120 from the inlet port 122, the cooling fluid passes through the first region 1311 and forms a first branch flow and a second branch flow. The first branch flow enters the second region 1312 and the third region 1313 in sequence, and then passes through the second gate 135 and enters the second channel 1321 along a direction (Z-axis direction) vertical to the plane where the first channel 131 is located. Then, the branch flow moves in the second channel 1321 along a direction (negative Y-axis direction) that is nearly perpendicular to the side wall 124 and enters the connecting space 133, and enters the outlet port 123 from the connecting space 133 and flows out of the housing 120.

[0080] On the other hand, the second flow of the first region 1311 passes through the first gate 134 and enters the second channel 1322 along a direction (Z-axis direction) perpendicular to the plane where the first channel 131 is located. Then, the flow moves in the second channel 1322 along a direction (negative Y-axis direction) nearly perpendicular to the side wall 124 and enters the connecting space 133, and moves in the connecting space 133 along a direction (X-axis direction) parallel to the side wall 124, and finally enters the outlet 123 from the connecting space 133 and flows out of the housing 120.

[0081] It is worth mentioning that the first flow branch and the second flow branch of the cooling fluid in this embodiment merge in the connecting space 133, so that the inlet end 122 and the outlet end 123 can be located on the same side of the housing 120, meeting the common design requirements of the on-board charger. In addition, when the inlet end 122 and the outlet end 123 are located on the same side of the housing 120, the flow path of the cooling fluid can flow through more areas through the design of the flow branch, increasing the absorption of heat, thereby improving the heat dissipation capacity of the heat dissipation structure 100.

[0082] In addition, the width W1 of the first gate 134 and the width W2 of the second gate 135 are preferably the same as the width W3 of the first channel 131, for example, 50 mm. According to actual tests, such a design effectively reduces the formation of vortices in the second channels 1321 and 1322, making it easier for the cooling liquid to form a streamline flow or a developed flow, thereby improving the heat transfer efficiency.

[0083] Figure 3 yes Figure 1A A schematic cross-sectional view of a vehicle charging device along the AA section line. In order to clearly show the flow channel structure, Figure 3 The cover is shown in dotted lines. Figure 3 The bold arrows in the figure schematically show the flow direction of the cooling fluid. Figure 3 , the vehicle charging device 10 also includes at least one heating element 200 and at least one plate 210. The heating element 200 of this embodiment includes a first heating element 201, a second heating element 202, a third heating element 203 and a fourth heating element 204, but the number of the heating element 200 is not limited thereto. The heating element 200 is disposed in the housing 120, and the heating element 200 and the cover 110 are located on different sides of the bottom wall 121. The cooling fluid can flow through the first channel 131 and the second channels 1321, 1322 of the flow channel structure 130 to dissipate heat from the heating element 200.

[0084] In detail, the first heating element 201 and the second heating element 202 of the present embodiment are passive electronic components, such as magnetic components or capacitors, but the types of passive electronic components are not limited thereto. The third heating element 203 and the fourth heating element 204 are active electronic components, such as power semiconductors, but the types of active electronic components are not limited thereto. In other embodiments, the first heating element 201 and the second heating element 202 may be active electronic components, and the third heating element 203 and the fourth heating element 204 may be passive electronic components, and the present invention is not limited thereto.

[0085] The board 210 of this embodiment includes a first board 211, a second board 212, a third board 213, a fourth board 214 and a main board 215, but the number of the board 210 is not limited thereto. The first board 211, the second board 212, the third board 213, the fourth board 214 and the main board 215 are disposed in the housing 120, wherein the main board 215 is, for example, a motherboard, connecting the first board 211, the second board 212, the third board 213 and the fourth board 214. The first board 211, the third board 213 and the fourth board 214 are, for example, nearly perpendicular to the bottom wall 121, and the second board 212 is, for example, parallel to the bottom wall 121.

[0086] The first heating element 201 is disposed on the first plate 211 and contacts the third surface P3 of the bottom wall 121 relative to the first surface P1. Since the bottom wall 121 is connected to the first channel 131, the first heating element 201 can be thermally coupled to the first channel 131 through the bottom wall 121. In other words, the heat generated by the first heating element 201 can be transferred from the bottom wall 121 to the first channel 131, and then the cooling liquid in the first channel 131 passes through the second channel 132, the connecting space 133 ( Figure 2 ) and outlet port 123( Figure 2 ) to discharge the heat out of the housing 120, thereby achieving a good heat dissipation effect.

[0087] Similarly, the second heating element 202 is disposed on the second plate 212 and contacts the third surface P3 of the bottom wall 121. The second heating element 202 is thermally coupled to the first channel 131 through the bottom wall 121, that is, the heat generated by the second heating element 202 can be transferred from the bottom wall 121 to the first channel 131, and then the cooling liquid in the first channel 131 passes through the second channel 132, the connecting space 133 and the outlet end 123 to discharge the heat out of the housing 120.

[0088] On the other hand, the housing 120 further includes opposite inner side walls 1251, 1252 and opposite inner side walls 1253, 1254. The inner side walls 1251, 1252, 1253, 1254 are disposed substantially perpendicularly to the bottom wall 121 and extend in a direction (Z-axis direction) away from the cover 110. The second channel 1321 is formed between the inner side wall 1253 and the inner side wall 1254, and the second channel 1322 is formed between the inner side wall 1251 and the inner side wall 1252.

[0089] The third heating element 203 and the fourth heating element 204 are respectively disposed on the third plate 213 and the fourth plate 214. The third plate 213 is connected to the inner side wall 1254, and the fourth plate 214 is connected to the inner side wall 1251. Since the inner side wall 1254 is connected to the second channel 1321, the third heating element 203 can be thermally coupled to the second channel 1321 through the third plate 213 and the inner side wall 1254. Similarly, since the inner side wall 1251 is connected to the second channel 1322, the fourth heating element 204 can be thermally coupled to the second channel 1322 through the fourth plate 214 and the inner side wall 1251. In other words, the heat generated by the third heating element 203 and the fourth heating element 204 can be transferred from the inner walls 1254 and 1251 to the second channels 1321 and 1322 respectively. The cooling liquid in the second channels 1321 and 1322 discharges the heat from the shell 120 through the connecting space 133 and the outlet end 123, thereby achieving a good heat dissipation effect.

[0090] By designing the first channel 131 and the second channel 132 to be nearly perpendicular or perpendicular to each other, the heat dissipation structure 100 increases the heat dissipation area without reducing the power density of the vehicle charging device 10, which is conducive to product miniaturization. In addition to dissipating heat for the first heating element 201 and the second heating element 202 arranged horizontally, the heat dissipation structure 100 can also dissipate heat for the third heating element 203 and the fourth heating element 204 arranged vertically, achieving excellent three-dimensional heat dissipation performance. In addition, the heating element 200 can be freely configured in the first channel 131 and the second channel 132, which helps to more effectively use the space in the housing 120.

[0091] In the present embodiment, a thermal interface material is provided between the heating element 200 and the plate 210 or between the plate 210 and the inner side wall 1251. The thermal interface material is, for example, thermal grease, potting compound or gap filler, but the type of thermal interface material is not limited thereto. For example, a potting compound is provided between the first heating element 201 and the bottom wall 121, a gap filler is provided between the second heating element 202 and the bottom wall 121, a thermal grease is applied between the third plate 213 and the inner side wall 1254, and a thermal grease is applied between the fourth plate 214 and the inner side wall 1251. Therefore, the heat generated by the first heating element 201, the second heating element 202, the third heating element 203 and the fourth heating element 204 can be transferred to the first channel 131 and the second channel 132 more quickly, thereby improving the overall heat dissipation efficiency.

[0092] In addition, the heat dissipation structure 100 of the present embodiment further includes a plurality of protrusions 150, and the gap between the protrusions 150 is, for example, 1 mm. The protrusions 150 protrude from the second surface P2 of the bottom wall 121 of the housing 120 and are located in the first area 1311 of the first channel 131. The protrusions 150 are, for example, circular cylinders or diamond-shaped cylinders, but the shape of the protrusions 150 is not limited thereto. The protrusions 150 increase the heat dissipation area of ​​the bottom wall 121, so that the heat generated by the first heating element 201 is more efficiently transferred to the first channel 131, thereby improving the heat dissipation performance of the first channel 131. The protrusions 150 may be a part of the bottom wall 121 and formed simultaneously when the bottom 121 is manufactured. There is a spacing G between the protrusions 150 and the cover 110, wherein the spacing G is, for example, 1 mm, so as to prevent the protrusions 150 from interfering with the cover 110 in structure.

[0093] In addition, the heat dissipation structure 100 of the present embodiment further includes at least one guide member 140. Four guide members 140 are shown, but the number of guide members 140 is not limited thereto. The guide member 140 is arc-shaped, disposed on the second surface P2 of the bottom wall 121 of the housing 120 and located in the first channel 131. The guide member 140 is, for example, disposed at a corner of the first channel 131 to prevent the cooling fluid from forming a vortex when turning, and can help the cooling fluid form a streamline flow or an expanded flow, thereby improving the heat conduction efficiency. In addition, there is a spacing G between the cover body 110 and the guide member 140 (that is, between the first surface P1 of the bottom wall 121 and the guide member 140), wherein the spacing G is, for example, 1 mm, to prevent the guide member 140 from structurally interfering with the cover body 110 and to reduce the resistance encountered by the cooling fluid when it flows.

[0094] Figure 4 yes Figure 1AA schematic cross-sectional view of a vehicle charging device along the BB section line. In order to clearly show the heat dissipation structure, the plate body and the heating element are not shown. Figure 4 , and the cover is shown in dotted lines. Figure 4 The connecting space 133 is connected to the second channels 1321 and 1322, and the cooling fluids in the second channels 1321 and 1322 merge into the connecting space 133 and then pass through the outlet port 123 ( Figure 2 ) discharge shell 120.

[0095] The depth H1 of the connecting space 133 in a direction nearly perpendicular to the bottom wall 121 (i.e., the Z-axis direction) is greater than the depth H2 of the first channel 131 in this direction (the Z-axis direction). In detail, the bottom wall 121 further includes a fourth surface P4 relative to the third surface P3, the fourth surface P4 is recessed in the first surface P1, and the fourth surface P4, the first surface P1, and the second surface P2 are located on the same side of the bottom wall 121. The depth H1 is located between the fourth surface P4 of the bottom wall 121 and the upper surface U of the cover body 110, and the depth H2 is located between the second surface P2 of the bottom wall 121 and the upper surface U of the cover body 110. The depth H1 is greater than the depth H2, so that good flow field efficiency can be achieved.

[0096] It is worth noting that the width W4 of the second channels 1321 and 1322 is preferably between 4 mm and 5 mm, and the height H of the second channels 1321 and 1322 is preferably between 40 mm and 60 mm. According to actual tests, such dimensions ensure that the cooling liquid fills the space in the second channels 1321 and 1322 under appropriate hydraulic pressure, so that the cooling liquid does not fall due to gravity and affect the cooling effect of the second channels 1321 and 1322.

[0097] In addition, the width W3 of the first channel 131 is preferably 50 mm, and the depth H2 of the first channel 131 is preferably 5 mm. According to actual tests, such dimensions effectively reduce the hydraulic pressure drop of the cooling fluid and reduce the possibility of vortex generation, which helps to form a streamline flow of the cooling fluid and improve the overall heat transfer efficiency.

[0098] Figure 5 FIG. 1 is a bottom view of a vehicle charging device according to another embodiment of the present invention. In order to clearly show the flow channel structure, the cover is not shown. Figure 5 . Figure 5 The vehicle charging device 10A and Figure 2 The main difference of the vehicle charging device 10 is that Figure 5There is only one second channel 132A in the flow channel structure 130A, and the flow channel structure 130A has no connecting space. In detail, the first channel 131A includes a first area 1311A and a second area 1312A connected to each other. The first area 1311A is connected between the inlet end 122 and the second area 1312A, and the second area 1312A is connected between the first area 1311A and the second channel 132A. The second area 1312A and the second channel 132A are arranged in an L shape. The second channel 132A is directly connected to the outlet end 123. The cooling fluid passes through the first area 1311A, the second area 1312A and the second channel 132A in sequence from the inlet end 122, and flows out of the housing 120 through the outlet end 123 to discharge heat from the housing 120A.

[0099] Figure 6 FIG. 1 is a bottom view of a vehicle charging device according to another embodiment of the present invention. In order to clearly show the flow channel structure, the cover is not shown. Figure 6 middle. Figure 6 The vehicle charging device 10B and Figure 2 The main difference of the vehicle charging device 10 is that Figure 6 The second channels 1321B and 1322B in the first channel 131B are not parallel to each other. In detail, the first channel 131B includes a first region 1311B, a second region 1312B and a third region 1313B. The first region 1311B is connected between the inlet end 122 and the second region 1312B, the second region 1312B is connected between the first region 1311B and the third region 1313B, and the third region 1313B is connected to the second channels 1321B and 1322B. The cooling fluid passes through the first region 1311B and the second region 1312B in sequence from the inlet end 122, and is divided from the third region 1313B into the second channels 1321B and 1322B. The cooling fluid flowing in the second channels 1321B and 1322B finally merges in the connecting space 133B, and flows out of the housing 120B through the outlet end 123 to discharge heat from the housing 120B.

[0100] In summary, in the heat dissipation structure of the present invention, when the cooling fluid flows into the flow channel structure, the vehicle charging device can be cooled through the first channel and the second channel. Since the second channel is upright on the first channel, the first channel and the second channel are located in different planes, and the area that can dissipate heat is increased without reducing the power density of the vehicle charging device, which helps to miniaturize the product. At the same time, the heating element can be freely arranged in the first channel or the second channel, making the use of the space in the shell more flexible. More importantly, through the combination of the first channel and the second channel that are nearly perpendicular or perpendicular to each other, the present invention realizes liquid-cooled heat dissipation in three-dimensional space, effectively improving the heat dissipation capacity.

[0101] In addition, the size of the second channel ensures that the cooling liquid fills the entire space in the second channel, so that the cooling liquid will not fall due to gravity and affect the heat dissipation effect. In addition, the heat dissipation structure also includes a guide member to prevent the cooling fluid from forming vortices when turning, so that the cooling fluid is more likely to form a streamline flow and improve the heat conduction efficiency.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat dissipation structure, suitable for dissipating heat from a vehicle charging device, comprising: Cover body; A housing, comprising a bottom wall, an inlet end and an outlet end, wherein the cover is sealingly coupled to the bottom wall of the housing, and the inlet end and the outlet end are respectively disposed on at least one side wall of the housing; and The flow channel structure is arranged in the housing and includes a first channel and at least one second channel connected to each other. The inlet end is connected to the first channel, the outlet end is connected to the at least one second channel, the first channel is formed between the bottom wall of the shell and the cover body, and the at least one second channel stands upright on the first channel.

2. The heat dissipation structure according to claim 1, characterized in that: The cooling fluid is suitable for flowing into the shell from the inlet end, passing through the first channel and the at least one second channel in sequence, and flowing out of the shell from the outlet end.

3. The heat dissipation structure according to claim 1, characterized in that: The shell further includes at least two inner side walls opposite to each other, the at least two inner side walls are arranged nearly perpendicular to the bottom wall, and the at least one second channel is formed between the at least two inner side walls.

4. The heat dissipation structure according to claim 1, characterized in that: The flow channel structure also includes a connecting space, the at least one second channel includes two second channels, the connecting space is connected between the two second channels and the outlet end, and the depth of the connecting space in a direction nearly perpendicular to the bottom wall is greater than the depth of the first channel in the direction.

5. The heat dissipation structure according to claim 1, characterized in that: It also includes at least one flow guide, wherein the at least one flow guide is arc-shaped, is arranged on the bottom wall of the shell and is located in the first channel.

6. The heat dissipation structure according to claim 5, characterized in that: There is a distance between the cover body and the at least one flow guide member.

7. The heat dissipation structure according to claim 1, characterized in that: It also includes a plurality of protrusions, wherein the plurality of protrusions protrude from the bottom wall of the shell and are located in the first channel.

8. The heat dissipation structure according to claim 1, characterized in that: The inlet port and the outlet port are located on the same side of the housing.

9. The heat dissipation structure according to claim 1, characterized in that: The width of the at least one second channel is between 4 mm and 5 mm, and the height of the at least one second channel is between 40 mm and 60 mm.

10. A vehicle charging device, comprising: Heat dissipation structure, including: Cover body; A housing, comprising a bottom wall, an inlet end and an outlet end, wherein the cover is sealingly coupled to the bottom wall of the housing, and the inlet end and the outlet end are respectively disposed on at least one side wall of the housing; and The flow channel structure is arranged in the housing and includes a first channel and at least one second channel connected to each other. wherein the inlet end is connected to the first channel, the outlet end is connected to the at least one second channel, the first channel is formed between the bottom wall of the shell and the cover, and the at least one second channel stands upright on the first channel; and At least one heating element is disposed in the housing, wherein a cooling fluid is suitable for flowing through the flow channel structure to dissipate heat for the at least one heating element.

11. The vehicle charging device according to claim 10, characterized in that: The cooling fluid is suitable for flowing into the shell from the inlet end, passing through the first channel and the at least one second channel in sequence, and flowing out of the shell from the outlet end.

12. The vehicle charging device according to claim 10, characterized in that: It also includes an inner side wall and a plate body that is almost perpendicular to the bottom wall, wherein the at least one heating element is an active electronic element and is configured on the plate body, the plate body is connected to the inner side wall, the inner side wall is arranged almost perpendicular to the bottom wall, and the at least one heating element is thermally coupled to the at least one second channel through the plate body and the inner side wall.

13. The vehicle charging device according to claim 10, characterized in that: It also includes a plate body parallel or nearly perpendicular to the bottom wall, wherein the at least one heating element is a passive electronic element and is configured on the plate body, the plate body is arranged in the shell, and the at least one heating element contacts the bottom wall and is thermally coupled to the first channel.

14. The vehicle charging device according to claim 10, characterized in that: The shell further includes at least two inner side walls opposite to each other, the at least two inner side walls are arranged nearly perpendicular to the bottom wall, and the at least one second channel is formed between the at least two inner side walls.

15. The vehicle charging device according to claim 10, characterized in that: The flow channel structure also includes a connecting space, the at least one second channel includes two second channels, the connecting space is connected between the two second channels and the outlet end, and the depth of the connecting space in a direction nearly perpendicular to the bottom wall is greater than the depth of the first channel in the direction.

16. The vehicle charging device according to claim 10, characterized in that: It also includes at least one flow guide, wherein the at least one flow guide is arc-shaped, is arranged on the bottom wall of the shell and is located in the first channel.

17. The vehicle charging device according to claim 16, characterized in that: There is a distance between the cover body and the at least one flow guide member.

18. The vehicle charging device according to claim 10, characterized in that: It also includes a plurality of protrusions, wherein the plurality of protrusions protrude from the bottom wall of the shell and are located in the first channel.

19. The vehicle charging device according to claim 10, characterized in that: The inlet port and the outlet port are located on the same side of the housing.

20. The vehicle charging device according to claim 10, characterized in that: The width of the at least one second channel is between 4 mm and 5 mm, and the height of the at least one second channel is between 40 mm and 60 mm.

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