On-board charger heat dissipation structure

Abstract

Provided in the present invention is an on-board charger heat dissipation structure, comprising: a housing the inner cavity of which is provided with a planar water channel, the inner cavity being provided with a three-dimensional water channel leading to the planar water channel, and the inner cavity being partitioned into a plurality of heat dissipation chambers connected to the planar water channel and the three-dimensional water channel; a plurality of functional modules, respectively provided in the heat dissipation chambers; a heat dissipation structure, provided in the inner cavity and communicated with the three-dimensional water channel by means of an inner flow channel thereof; and a power module, connected to the heat dissipation structure. The on-board charger heat dissipation structure provided by the present invention involves a simple layout and assembly process, and the power module and a bridge arm heat dissipation structure thereof are connected to the three-dimensional water channel by means of screws in cooperation with sealing rings or sealants, so as to facilitate rapid disassembly and assembly of the power module, thus improving the production efficiency; the present invention saves the space for mounting the three-dimensional water channel inside the housing, and increases the mounting space for the planar water channel for heat dissipation of other functional modules, thus helping to sufficient heat dissipation of all modules of the whole machine; and protrusions or fin structures are provided inside the planar water channel and the bridge arm heat dissipation structure to increase the heat exchange contact area, thus improving the heat dissipation efficiency and power density of the power module.

Description

Vehicle-mounted charger heat dissipation structure TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle-mounted charger, in particular to a vehicle-mounted charger heat dissipation structure. BACKGROUND

[0002] The vehicle-mounted charger (OBC) is a charger installed on an electric vehicle, which is an important part of the vehicle charging system, and realizes the functions of rectifying alternating current into direct current to charge the power storage battery and converting the direct current output by the battery into alternating current for external electrical appliances. With the continuous improvement of battery capacity and charging power, higher requirements are put forward for the heat dissipation performance of each unit module in the vehicle-mounted charger.

[0003] At present, the integrated heat dissipation scheme of the power module and other functional modules of the OBC provided by the industry is usually to directly arrange the discrete power devices on the surface of the three-dimensional water channel through the aluminum substrate, coat thermal interface material (TIM) between the aluminum substrate and the shell, and use a pressing strip to press or glue to fix it to the shell. This heat dissipation structure layout and assembly process is complex, which reduces the production efficiency of the vehicle-mounted charger, and the power module is not convenient for disassembly, maintenance, upgrading and updating. In addition, this heat dissipation layout leads to the need for discrete power devices and three-dimensional water channels to occupy a large amount of accommodation space in the OBC shell, which reduces the space for installing the planar water channel for heat dissipation of other functional modules in the OBC shell, which is not conducive to the full heat dissipation of each module of the OBC. SUMMARY

[0004] The present application provides a vehicle-mounted charger heat dissipation structure to solve the technical problem of complex assembly of the heat dissipation structure of the power module of the existing vehicle-mounted charger.

[0005] To solve the above problems, the technical scheme adopted by the present application is:

[0006] The present application provides a vehicle-mounted charger heat dissipation structure, comprising:

[0007] The shell has a planar water channel in the inner cavity, and the inner cavity is divided into a plurality of heat dissipation chambers connected with the planar water channel and / or the three-dimensional water channel;

[0008] A plurality of functional modules are arranged in each heat dissipation chamber;

[0009] A heat dissipation structure is arranged in the inner cavity and connected with the three-dimensional water channel through the internal flow channel;

[0010] At least one power module is connected to the heat dissipation structure.

[0011] Preferably, the power module is connected to the heat dissipation structure through a heat conductive structure layer.

[0012] Preferably, the heat conductive structure layer is a heat interface material layer, a heat conductive glue layer or a solder layer.

[0013] Further, the vehicle-mounted charger heat dissipation structure further comprises:

[0014] The waterway inlet and the waterway outlet are arranged on the shell in a spaced manner;

[0015] The three-dimensional waterway comprises:

[0016] The first vertical waterway and the second vertical waterway are arranged at one end of the inner cavity in a spaced manner;

[0017] The planar waterway comprises:

[0018] The first longitudinal waterway and the second longitudinal waterway are arranged on the bottom of the shell in a spaced manner, and correspondingly connected to the waterway inlet, the first vertical waterway, the waterway outlet and the second vertical waterway respectively;

[0019] The internal flow channel is connected between the first vertical waterway and the second vertical waterway.

[0020] Preferably, the first longitudinal waterway and the second longitudinal waterway are respectively connected to the bottom inlet of the first vertical waterway and the bottom outlet of the second vertical waterway.

[0021] The heat dissipation structure comprises:

[0022] The bridge arm body is internally provided with an internal flow channel;

[0023] The water inlet connector and the water outlet connector are arranged at the two ends of the bottom of the bridge arm body in a spaced manner, and the water inlet connector and the water outlet connector are respectively provided with a water inlet hole and a water outlet hole inside, and the water inlet hole and the water outlet hole are respectively connected between the flow inlet end of the internal flow channel and the top outlet of the first vertical waterway, and the flow outlet end of the internal flow channel and the top inlet of the second vertical waterway.

[0024] Further, the outer surface of the bottom wall of the shell away from the inner cavity is arranged with a left waterway groove and a right waterway groove in a spaced manner, the left water inlet end of the left waterway groove and the right water outlet end of the right waterway groove are respectively connected to the waterway inlet and the waterway outlet, and the left water outlet end of the left waterway groove and the right water inlet end of the right waterway groove are respectively extended to one end of the bottom wall opposite to the waterway inlet and the waterway outlet; the left waterway groove and the right waterway groove are both arranged with a plurality of heat dissipation protrusions in a spaced manner.

[0025] The vehicle-mounted charger heat dissipation structure further comprises:

[0026] The waterway cover plate is sealingly connected to the outer surface of the bottom wall, and forms the first longitudinal waterway and the second longitudinal waterway with the left waterway groove and the right waterway groove respectively.

[0027] Preferably, the inner surface of the bottom wall towards the inner cavity is spaced apart from one end of the water channel inlet and the water channel outlet by a first water channel column and a second water channel column, the hollow interior of the first water channel column and the second water channel column correspondingly forms a first vertical water channel and a second vertical water channel extending vertically, the bottom end water inlet and the bottom end water outlet are correspondingly connected to the left water outlet end and the right water inlet end, and the top end water outlet and the top end water inlet are correspondingly arranged on the top surface of the first water channel column and the second water channel column.

[0028] Preferably, the top end water outlet and the top surface of the first water channel column form a first mounting step around the first vertical water channel, the bottom surface of the first mounting step is provided with a first sealing groove around the first vertical water channel, and a first sealing ring is embedded in the first sealing groove.

[0029] The top end water inlet and the top surface of the second water channel column form a second mounting step around the second vertical water channel, the bottom surface of the second mounting step is provided with a second sealing groove around the second vertical water channel, and a second sealing ring is embedded in the second sealing groove.

[0030] The water inlet connector is mounted on the first mounting step, and the water inlet hole is opposite to the top end water outlet, and the end of the water inlet connector is pressed against the first sealing ring.

[0031] The water outlet connector is mounted on the second mounting step, and the water outlet hole is opposite to the top end water inlet, and the end of the water outlet connector is pressed against the second sealing ring.

[0032] Preferably, the outer side surface of the water inlet connector is provided with a third sealing groove around it in the circumferential direction, and a third sealing ring is embedded in the third sealing groove.

[0033] The outer side surface of the water outlet connector is provided with a fourth sealing groove around it in the circumferential direction, and a fourth sealing ring is embedded in the fourth sealing groove.

[0034] When the water inlet connector is mounted on the first mounting step, the inner side surface of the first mounting step presses the third sealing ring.

[0035] When the water outlet connector is mounted on the second mounting step, the inner side surface of the second mounting step presses the fourth sealing ring.

[0036] Preferably, the bridge arm body comprises:

[0037] A heat dissipation bottom plate, the water inlet connector and the water outlet connector are spaced apart at the two ends of the bottom of the heat dissipation bottom plate, and the water inlet hole and the water outlet hole correspondingly penetrate the top surface of the heat dissipation bottom plate at the two ends;

[0038] A heat dissipation top plate, the heat dissipation top plate is provided with a flow channel groove towards the bottom surface of the heat dissipation bottom plate, the two ends of the flow channel groove correspondingly extend to positions covering the water inlet hole and the water outlet hole, and a plurality of heat dissipation fins are spaced apart in the flow channel groove.

[0039] The heat dissipation top plate and the heat dissipation bottom plate are connected in a bridge arm body in an up-down mode, and the heat dissipation bottom plate and the flow channel groove enclose an internal flow channel.

[0040] The power module is connected to the top surface of the heat dissipation top plate away from the heat dissipation bottom plate through the heat conduction structure layer.

[0041] Preferably, the power module is connected to the top surface of the heat dissipation top plate away from the heat dissipation bottom plate through the heat conduction structure layer.

[0042] Preferably, the functional module comprises:

[0043] The first EMC unit, the second EMC unit, the first magnetic element unit and the second magnetic element unit are respectively arranged in the heat dissipation chamber connected to the planar water channel;

[0044] The filter unit is arranged in the heat dissipation chamber connected to the planar water channel and the three-dimensional water channel.

[0045] Further, the top end of the shell forms an opening communicating with the inner cavity, and the vehicle-mounted charger heat dissipation structure further comprises:

[0046] The top cover covers the opening to close the inner cavity;

[0047] The circuit board is arranged in the inner cavity corresponding to the opening and located between the top end of the heat dissipation chamber and the top cover, and the circuit board is electrically connected to the power module and the functional module.

[0048] The insulating layer is arranged between the top cover and the circuit board, and the insulating flanges extend into the inner cavity and are arranged between the power module, the functional module and the shell.

[0049] Compared with the prior art, the present application has the following beneficial effects:

[0050] The vehicle-mounted charger heat dissipation structure provided by the application provides a heat dissipation structure layout of plane water channel to three-dimensional water channel-bridge arm heat dissipation structure to plane water channel again, the heat dissipation structure layout and assembly process are simple, the power module, the bridge arm heat dissipation structure is connected with the three-dimensional water channel of the shell through screw cooperation sealing ring or sealing glue, the power module is quickly disassembled and maintained and upgraded, and the OBC production efficiency is improved; meanwhile, the space for installing the three-dimensional water channel in the OBC shell is saved, the installation space of the plane water channel for dissipating heat for other functional modules is improved, the full heat dissipation of the OBC modules is facilitated; the convex or fin heat dissipation structure can be arranged in the internal flow channel of the plane water channel and the bridge arm heat dissipation structure respectively to increase the contact area with the cooling liquid, so that the convective heat transfer coefficient is increased, the convective heat transfer thermal resistance is reduced, the power module heat dissipation efficiency and power density are improved; the plane water channel is used for dissipating heat for the magnetic element, EMC and other functional modules, the three-dimensional water channel is used for dissipating heat for the filter unit, and the bridge arm heat dissipation structure is used for dissipating heat for the power module, so that full heat dissipation is realized for each functional module and power module in the OBC, and the overall heat dissipation performance of the power module and each functional module is improved; the power module is directly installed on the bridge arm heat dissipation structure through the heat conduction structure layer of TIM material, heat curing glue and soldering tin, the air in the contact interface can be filled, the contact thermal resistance is reduced, and the heat dissipation performance is improved, and the number can be increased or decreased according to actual needs; the insulating layer between the PCB and the top cover uses hard insulating plastic to support automatic production. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions provided by the application, the application will be described in detail below in combination with embodiments and drawings. It should be understood that the embodiments and drawings described in the following specific embodiments and drawings are only some embodiments of the application, and those skilled in the art can make changes to the drawings under the concept of the application.

[0052] Fig. 1 is an overall explosion structure schematic diagram of the embodiment of the vehicle-mounted charger heat dissipation structure provided by the application;

[0053] Fig. 2 is a shell and plane water channel schematic diagram of the bottom view of the vehicle-mounted charger heat dissipation structure in Fig. 1;

[0054] Fig. 3 is a shell and three-dimensional water channel top view structure schematic diagram of the vehicle-mounted charger heat dissipation structure in Fig. 1;

[0055] Fig. 4 is an explosion structure schematic diagram of the shell and heat dissipation structure of the vehicle-mounted charger heat dissipation structure in Fig. 1;

[0056] Fig. 5 is a top view structure schematic diagram of the shell and three-dimensional water channel assembled with the heat dissipation structure in Fig. 3;

[0057] Fig. 6 is a cross-sectional view structure schematic diagram of the shell, three-dimensional water channel and heat dissipation structure in Fig. 5 along the A-A direction;

[0058] Fig. 7 is a partial enlarged structural schematic view of region B in Fig. 6;

[0059] Fig. 8 is an exploded structural schematic view of the heat dissipation structure in Fig. 4;

[0060] Fig. 9 is an exploded schematic view of the connecting structure of the power module and the heat dissipation structure in Fig. 4;

[0061] Fig. 10 is a schematic view of the power module and the heat dissipation structure in Fig. 1 being replaced by another connecting structure;

[0062] Fig. 11 is an exploded schematic view of another connecting structure of the power module and the heat dissipation structure in Fig. 10;

[0063] Fig. 12 is an assembly structural schematic view of the heat dissipation structure in Fig. 4 being assembled with different numbers of power modules;

[0064] Fig. 13 is a structural schematic view of the heat dissipation fins in the bottom perspective view of the heat dissipation top plate in Fig. 8 adopting rectangular fins;

[0065] Fig. 14 is a structural schematic view of the heat dissipation fins in the bottom perspective view of the heat dissipation top plate in Fig. 8 adopting diamond-shaped fins;

[0066] Fig. 15 is a structural schematic view of the heat dissipation fins in the bottom perspective view of the heat dissipation top plate in Fig. 8 adopting circular fins;

[0067] Fig. 16 is a structural schematic view of the heat dissipation fins in the bottom perspective view of the heat dissipation top plate in Fig. 8 adopting tooth-shaped fins;

[0068] Fig. 17 is a structural schematic view of the heat dissipation protrusions in Fig. 2 adopting heat dissipation fins.

[0069] In the drawings, the main reference signs are as follows:

[0070] 1, housing; 10, connecting screw; 11, inner cavity; 111, partition wall; 112, heat dissipation chamber; 113, open; 12, bottom wall; 121, left side waterway groove; 1211, left water inlet end; 1212, left water outlet end; 122, right side waterway groove; 1221, right water inlet end; 1222, right water outlet end; 123, heat dissipation protrusion; 13, waterway cover plate; 14, first waterway column; 141, first mounting step; 1411, first sealing groove; 142, first sealing ring; 15, second waterway column; 151, second mounting step; 1511, second sealing groove; 152, second sealing ring; 16, mounting hole; 17, top cover; 18, pressing strip; 181, welding foot; 2, planar waterway; 21, first longitudinal waterway; 22, second longitudinal waterway; 23, waterway inlet; 24, waterway outlet; 3, three-dimensional waterway; 31, first vertical waterway; 311, bottom end water inlet; 312, top end water outlet; 32, second vertical waterway; 321, bottom end water outlet; 322, top end water inlet; 4, functional module; 41, first EMC unit; 42, second EMC unit; 43, first magnetic element unit; 44, second magnetic element unit; 45, filter unit; 5, heat dissipation structure; 50, internal flow channel; 51, bridge arm main body; 511, heat dissipation bottom plate; 512, heat dissipation top plate; 5121, flow channel groove; 5122, fixing hole; 513, perforation; 514, heat dissipation fin; 5141, rectangular fin; 5142, rhombus fin; 5143, circular fin; 5144, toothed fin; 52, water inlet connector; 521, water inlet hole; 522, third sealing groove; 5221, third sealing ring; 53, water outlet connector; 531, water outlet hole; 532, fourth sealing groove; 5321, fourth sealing ring; 6, power module; 61, connecting hole; 62, heat conduction structure layer; 7, circuit board; 8, insulation layer; 81, insulation flange; 9, plug-in module.

[0071] Wherein, other marks in the figure are as follows:

[0072] X, first horizontal direction; Y, second horizontal direction; Z, vertical direction. DETAILED DESCRIPTION

[0073] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clearly, the present application will be further described in detail below in combination with Figures 1-17 and examples.

[0074] Please refer to Figures 1-12, the vehicle charger heat dissipation structure provided by the present application comprises:

[0075] A housing 1, which is preferably rectangular (cuboid), has a rectangular (cuboid) inner cavity 11 of the housing 1 provided with a planar water channel 2; in this embodiment, the central axis direction of the housing 1 is a first horizontal direction X; one end of the inner cavity 11 in the first horizontal direction X is provided with a three-dimensional water channel 3 in communication with the planar water channel 2, and the inner cavity 11 is divided into a plurality of heat dissipation chambers 112 connected to the planar water channel 2 and / or the three-dimensional water channel 3 by a plurality of longitudinal and transverse intersecting partition walls 111; a plurality of functional modules 4 are respectively fixedly arranged in each heat dissipation chamber 112; a heat dissipation structure 5 is arranged at one end of the inner cavity 11 in the first horizontal direction X and is in communication with the three-dimensional water channel 3 through an internal flow channel 50 of the heat dissipation structure 5; and at least one power module 6 is connected to the heat dissipation structure 5.

[0076] In another embodiment (not shown in the figure), the three-dimensional water channel 3 can also be arranged at the middle of the inner cavity 11 in the first horizontal direction X (i.e., at a position between the two ends of the inner cavity 11 in the first horizontal direction X) and in communication with the planar water channel 2.

[0077] In other embodiments, the central axis direction of the housing 1 can also be an inclined direction with an inclination angle.

[0078] In this embodiment, the power module 6 is connected to the heat dissipation structure 5 through a heat-conducting structure layer 62.

[0079] As a preferred implementation of this embodiment, the heat-conducting structure layer 62 is a thermal interface material layer, a heat-conducting adhesive layer, or a solder layer. The specific connection mode of the power module 6 and the heat dissipation structure 5 is described below.

[0080] In this embodiment, the internal chip of the power module 6 can be made of silicon, gallium nitride, or silicon carbide, etc.

[0081] In this embodiment, the power module 6 can adopt the form of single-sided PIN pins or double-sided PIN pins.

[0082] Please refer to Figures 1-5 together, in this embodiment, the functional module 4 includes:

[0083] The first EMC unit 41, the second EMC unit 42, the first magnetic element unit 43, and the second magnetic element unit 44 are respectively fixedly arranged in the heat dissipation chamber 112 connected to the planar water channel 2 and are connected to the water channel wall of the planar water channel 2 through a heat-conducting structure or directly; and the filter unit 45 is fixedly arranged in the heat dissipation chamber 112 connected to both the planar water channel 2 and the three-dimensional water channel 3 and is connected to the water channel walls of both the planar water channel 2 and the three-dimensional water channel 3 through a heat-conducting structure or directly.

[0084] Please refer to Figs. 1-7, in this embodiment, the heat dissipation structure of the vehicle-mounted charger further comprises: a water inlet 23 and a water outlet 24, which are arranged at opposite ends of the three-dimensional water channel 3 in the first horizontal direction X of the shell 1, i.e. the water inlet 23 and the water outlet 24 are arranged in the second horizontal direction Y perpendicular to the first horizontal direction X; the three-dimensional water channel 3 comprises: a first vertical water channel 31 and a second vertical water channel 32 arranged at opposite ends of the inner cavity 11 away from the water inlet 23 and the water outlet 24, i.e. the first vertical water channel 31 and the second vertical water channel 32 are arranged in the second horizontal direction Y;

[0085] The planar water channel 2 comprises: a first longitudinal water channel 21 and a second longitudinal water channel 22 arranged at opposite sides of the bottom of the shell 1 in the first horizontal direction X (i.e. arranged at the bottom of the left and right sides of the central axis of the shell 1), and respectively connected to the water inlet 23, the first vertical water channel 31 and the water outlet 24, the second vertical water channel 32; the internal flow channel 50 of the heat dissipation structure 5 is connected between the first vertical water channel 31 and the second vertical water channel 32.

[0086] In other embodiments (not shown in the drawings), the water inlet 23 and the water outlet 24 can also be arranged at the same end of the three-dimensional water channel 3 in the first horizontal direction X of the shell 1.

[0087] Please refer to Figs. 1-7, in this embodiment, the first longitudinal water channel 21 and the second longitudinal water channel 22 are respectively connected to the bottom inlet 311 of the first vertical water channel 31 and the bottom outlet 321 of the second vertical water channel 32; the heat dissipation structure 5 comprises: a bridge arm body 51 extending in the second horizontal direction Y, the bridge arm body 51 is internally provided with the above-mentioned internal flow channel 50 extending in the second horizontal direction Y; a water inlet connector 52 and a water outlet connector 53 are arranged at opposite ends of the bottom of the bridge arm body 51 in the second horizontal direction Y, the water inlet connector 52 and the water outlet connector 53 are respectively provided with a water inlet hole 521 and a water outlet hole 531 inside, and the water inlet hole 521 and the water outlet hole 531 are respectively connected between the flow inlet end of the internal flow channel 50 and the top outlet 312 of the first vertical water channel 31, and the flow outlet end of the internal flow channel 50 and the top inlet 322 of the second vertical water channel 32.

[0088] In other embodiments, the bridge arm body 51 can also be arranged in an inclined direction with an inclination angle or a horizontal direction not perpendicular to the first horizontal direction X.

[0089] Please refer to Figs. 1-7, in the embodiment, the outer surface of the bottom wall 12 of the shell 1 is spaced apart with a left water channel groove 121 and a right water channel groove 122 in the second horizontal direction Y, and the left water channel groove 121 and the right water channel groove 122 extend approximately in the horizontal plane along the first horizontal direction X; the left water inlet end 1211 of the left water channel groove 121 and the right water outlet end 1222 of the right water channel groove 122 correspond to the water channel inlet 23 and the water channel outlet 24 respectively, and the left water outlet end 1212 of the left water channel groove 121 and the right water inlet end 1221 of the right water channel groove 122 extend to the end of the bottom wall 12 opposite to the water channel inlet 23 and the water channel outlet 24 in the first horizontal direction X respectively; the left water channel groove 121 and the right water channel groove 122 are both spaced apart with a plurality of heat dissipation protrusions 123; the vehicle-mounted charger heat dissipation structure further comprises a water channel cover plate 13, which is sealingly connected to the outer surface of the bottom wall 12 and encloses the first longitudinal water channel 21 and the second longitudinal water channel 22 with the left water channel groove 121 and the right water channel groove 122 respectively.

[0090] Please refer to Fig. 2, as the preferred embodiment of the embodiment, the heat dissipation protrusions 123 adopt various regular or irregular geometric shapes, and the plurality of heat dissipation protrusions 123 are irregularly spaced apart on the left water channel groove 121 and the right water channel groove 122.

[0091] Please refer to Fig. 17, in other embodiments, the heat dissipation protrusions 123 adopt heat dissipation fins of various regular or irregular geometric shapes, and the plurality of heat dissipation fins are spaced apart on the left water channel groove 121 and the right water channel groove 122 to achieve the best heat dissipation effect of the planar water channel.

[0092] In other embodiments, the first longitudinal water channel 21 and the second longitudinal water channel 22 can adopt designs of different flow areas, different water channel shapes, and different water channel depths to achieve the best heat dissipation effect of the planar water channel.

[0093] Please refer to Figs. 1 and 2, as the preferred embodiment of the embodiment, the water channel cover plate 13 and the outer surface of the bottom wall 12 of the shell 1 are sealed by welding, sealing rings or sealing glue to fixedly connect the water channel cover plate 13 and the shell 1 as a whole, and cooperate to enclose the first longitudinal water channel 21 and the second longitudinal water channel 22 between the left water channel groove 121 and the right water channel groove 122 of the outer surface of the bottom wall 12.

[0094] Please see Figs. 1-7, in this embodiment, the inner surface of the bottom wall 12 towards the inner cavity 11 is provided with a hollow first water channel column 14 and a second water channel column 15 in the first horizontal direction X, the hollow inner part of the first water channel column 14 and the second water channel column 15 correspondingly form the first vertical water channel 31 and the second vertical water channel 32 extending in the vertical direction Z, the bottom end water inlet 311 of the first vertical water channel 31 and the bottom end water outlet 321 of the second vertical water channel 32 correspondingly connect to the left water outlet end 1212 of the left water channel groove 121 and the right water inlet end 1221 of the right water channel groove 122, the top end water outlet 312 of the first vertical water channel 31 and the top end water inlet 322 of the second vertical water channel 32 are correspondingly provided on the top surface of the first water channel column 14 and the second water channel column 15.

[0095] In other embodiments, the first vertical water channel 31 and the second vertical water channel 32 can also extend in an inclined direction intersecting the vertical direction Z.

[0096] Please see Figs. 4-7, in this embodiment, the connection between the top end water outlet 312 of the first vertical water channel 31 and the top surface of the first water channel column 14 forms a first mounting step 141 surrounding the first vertical water channel 31, the bottom surface of the first mounting step 141 is provided with a first sealing groove 1411 surrounding the first vertical water channel 31, and a first sealing ring 142 is embedded in the first sealing groove 1411.

[0097] The connection between the top end water inlet 322 of the second vertical water channel 32 and the top surface of the second water channel column 15 forms a second mounting step 151 surrounding the second vertical water channel 32, the bottom surface of the second mounting step 151 is provided with a second sealing groove 1511 surrounding the second vertical water channel 32, and a second sealing ring 152 is embedded in the second sealing groove 1511.

[0098] When the heat dissipation structure 5 is assembled with the shell 1, the water inlet connector 52 at one end of the bottom of the bridge arm body 51 in the second horizontal direction Y is mounted on the first mounting step 141, and the water inlet hole 521 is connected to the top end water outlet 312, and the end of the water inlet connector 52 presses the first sealing ring 142; the water outlet connector 53 at the other end of the bottom of the bridge arm body 51 in the second horizontal direction Y is mounted on the second mounting step 151, and the water outlet hole 531 is connected to the top end water inlet 322, and the end of the water outlet connector 53 presses the second sealing ring 152.

[0099] Please refer to Figs. 4-9, in the embodiment, the outer side of the water inlet joint 52 is provided with a third sealing groove 522 which is circumferentially arranged around the water inlet joint 52, and the third sealing groove 522 is embedded with a third sealing ring 5221; the outer side of the water outlet joint 53 is provided with a fourth sealing groove 532 which is circumferentially arranged around the water outlet joint 53, and the fourth sealing groove 532 is embedded with a fourth sealing ring 5321; when the water inlet joint 52 is installed on the first installation step 141, the inner side of the first installation step 141 presses the third sealing ring 5221; when the water outlet joint 53 is installed on the second installation step 151, the inner side of the second installation step 151 presses the fourth sealing ring 5321.

[0100] Please refer to Figs. 4-13, in the embodiment, the bridge arm body 51 comprises:

[0101] a heat dissipation bottom plate 511 which extends along the second horizontal direction Y, the bottom of the heat dissipation bottom plate 511 is provided with the water inlet joint 52 and the water outlet joint 53 which are spaced apart at the two ends on the second horizontal plane, and the water inlet hole 521 of the water inlet joint 52 and the water outlet hole 531 of the water outlet joint 53 respectively correspond to the positions which extend through the top surface of the heat dissipation bottom plate 511 at the two ends on the second horizontal plane;

[0102] a heat dissipation top plate 512 which extends along the second horizontal direction Y, the heat dissipation top plate 512 is provided with a flow channel groove 5121 which faces the bottom surface of the heat dissipation bottom plate 511, the two ends of the flow channel groove 5121 on the second horizontal direction Y respectively correspond to the positions which extend to cover the water inlet hole 521 and the water outlet hole 531; the flow channel groove 5121 is provided with a plurality of heat dissipation fins 514 which are spaced apart;

[0103] the heat dissipation top plate 512 and the heat dissipation bottom plate 511 are connected in a top-to-bottom manner to form the bridge arm body 51 which extends along the second horizontal direction Y, and the heat dissipation bottom plate 511 and the flow channel groove 5121 enclose the above-mentioned internal flow channel 50, and the flow channel groove 5121 encloses the above-mentioned flow channel water inlet end and the above-mentioned flow channel water outlet end with the heat dissipation bottom plate 511 at the two ends on the second horizontal direction Y, and the water inlet hole 521 and the water outlet hole 531 are respectively connected to the flow channel water inlet end and the flow channel water outlet end.

[0104] Please refer to Fig. 13, in one implementation of the embodiment, the plurality of heat dissipation fins 514 which are spaced apart on the flow channel groove 5121 of the bottom surface of the heat dissipation top plate 512 are rectangular fins 5141 which have a rectangular cross section.

[0105] Please refer to Fig. 14, in one implementation of the embodiment, the plurality of heat dissipation fins 514 which are spaced apart on the flow channel groove 5121 of the bottom surface of the heat dissipation top plate 512 are rhombic fins 5142 which have a rhombic cross section.

[0106] Please refer to FIG. 15, in one embodiment of the present embodiment, the plurality of heat dissipation fins 514 arranged at intervals in the flow channel groove 5121 on the bottom surface of the heat dissipation top plate 512 are circular fins 5143 with a circular cross section.

[0107] Please refer to FIG. 16, in another embodiment of the present embodiment, the plurality of heat dissipation fins 514 arranged at intervals in the flow channel groove 5121 on the bottom surface of the heat dissipation top plate 512 are tooth-shaped fins 5144 with a tooth-shaped cross section.

[0108] In other embodiments of the present embodiment, the size, shape, arrangement, etc. of the heat dissipation fins 514 can be adjusted to other irregular / abnormal heat dissipation fins 514 according to actual conditions, so as to achieve the best heat dissipation effect of the internal flow channel 50 of the heat dissipation structure 5 on the power module 6.

[0109] Please refer to FIGS. 3-9, as a preferred embodiment of the present embodiment, four through holes 513 are arranged at the corresponding four corners of the heat dissipation bottom plate 511 and the heat dissipation top plate 512, respectively, two mounting holes 16 are arranged at intervals on the top surface of the first water channel column 14 and the second water channel column 15, respectively, and the bridge arm body 51 of the heat dissipation structure 5 is fastened and connected to the first water channel column 14 and the second water channel column 15 through four connecting screws 10 passing through the corresponding through holes 513 and mounting holes 16, and is assembled in the inner cavity 11 of the shell 1.

[0110] As a preferred embodiment of the present embodiment, the heat dissipation bottom plate 511 and the heat dissipation top plate 512 are sealed by welding, sealing rings or sealing glue, so as to be integrally fixed and connected as a complete bridge arm body 51.

[0111] In other embodiments, the internal space shape and layout of the planar water channel 2 and the three-dimensional water channel 3 can be adjusted according to actual conditions, and are not limited to the structure and layout of the first longitudinal water channel 21, the second longitudinal water channel 22, the first vertical water channel 31 and the second vertical water channel 32. For example, a transverse water channel can be arranged between the second longitudinal water channel 22 and the second vertical water channel 32 as part of the planar water channel 2 and connected to the two, or an inclined water channel can be used instead of the first vertical water channel 31 and the second vertical water channel 32.

[0112] The water channel inlet 23 can also be connected to the first vertical water channel 31 or the second vertical water channel 32 arranged at one end of the inner cavity 11, and the water channel outlet 24 is arranged at the end of the inner cavity 11 away from the water channel inlet 23 and connected to the planar water channel 2, so that the flow direction of the cooling water or cooling liquid in the vehicle-mounted charger heat dissipation structure is changed to pass through the water channel inlet 23, the first vertical water channel 31, the internal flow channel 50, the second vertical water channel 32, the planar water channel 2 and the water channel outlet 24 in sequence.

[0113] Alternatively, the water channel inlet 23 can also be connected to the internal flow channel 50 of the heat dissipation structure 5 arranged at one end of the inner cavity 11, and the water channel outlet 24 is arranged at the end of the inner cavity 11 away from the water channel inlet 23 and connected to the planar water channel 2, so that the flow direction of the cooling water or cooling liquid in the heat dissipation structure of the vehicle-mounted charging machine is changed to pass through the water channel inlet 23, the internal flow channel 50, the first vertical water channel 31 or the second vertical water channel 32, the planar water channel 2 and the water channel outlet 24 in sequence.

[0114] Please refer to FIGS. 4, 8 and 9, in the embodiment, the power module 6 is connected to the top surface of the heat dissipation top plate 512 away from the heat dissipation bottom plate 511 through the heat conduction structure layer 62.

[0115] Please refer to FIGS. 4, 5, 8 and 9, in one embodiment of the embodiment, the power module 6 is fastened and connected with the fixing hole 5122 arranged on the heat dissipation top plate 512 through the connecting screw 10 passing through the connecting hole 61 or the connecting groove at both ends of the power module 6, and the thermal interface material is coated between the power module 6 and the heat dissipation top plate 512 to form the thermal interface material layer as the heat conduction structure layer 62, so as to reduce the interface thermal resistance between the heat dissipation structure 5 and the power module 6 and improve the heat dissipation effect of the internal flow channel 50 of the heat dissipation structure 5 on the power module 6.

[0116] In one embodiment of the embodiment, the connecting screw 10 is not used, and the heat conduction glue is coated between the power module 6 and the heat dissipation top plate 512 to form the heat conduction glue layer as the heat conduction structure layer 62, and the heat conduction glue layer can not only fix the connection between the power module 6 and the heat dissipation structure 5, but also reduce the interface thermal resistance between the heat dissipation structure 5 and the power module 6 and improve the heat dissipation effect of the internal flow channel 50 of the heat dissipation structure 5 on the power module 6.

[0117] In another embodiment of the embodiment, the connecting screw 10 is not used, and the solder is welded between the power module 6 and the heat dissipation top plate 512 to form the solder layer as the heat conduction structure layer 62, and the solder layer can not only fix the connection between the power module 6 and the heat dissipation structure 5, but also reduce the interface thermal resistance between the heat dissipation structure 5 and the power module 6 and improve the heat dissipation effect of the internal flow channel 50 of the heat dissipation structure 5 on the power module 6.

[0118] Please refer to Fig. 10, 11, in another embodiment of the present embodiment, instead of using connecting screw 10, pressure bar 18 is used to press on the top of power module 6, and the welding foot 181 of pressure bar 18 is welded to the top surface of heat dissipation top plate 512 of bridge arm body 51 of heat dissipation structure 5, so that power module is pressed on heat dissipation structure 5 by pressure bar 18 with greater pressure than connecting screw 10 or locking bolt. At the same time, thermal interface material is coated between power module 6 and heat dissipation top plate 512 to form thermal interface material layer as the above-mentioned heat conduction structure layer 62, which can also reduce the interface thermal resistance between heat dissipation structure 5 and power module 6 and improve the heat dissipation effect of internal flow channel 50 of heat dissipation structure 5 on power module 6.

[0119] In other embodiments, power module 6 can also be installed at the position of planar water channel 2 or three-dimensional water channel 3, and the above-mentioned pressure bar 18, connecting screw 10 or bolt, welding and adhesive connection and the like connection methods can be used.

[0120] Please refer to Fig. 1, 4, 5, 8, 9, in the present embodiment, three power modules 6 are connected to the top surface of heat dissipation top plate 512 away from heat dissipation bottom plate 511 through the above-mentioned heat conduction structure layer 62.

[0121] Please refer to Fig. 12, in other embodiments, through the above-mentioned heat conduction structure layer 62, different number and position of power modules 6 can be conveniently assembled and arranged on heat dissipation top plate 512 of heat dissipation structure 5 according to actual needs, for example, the number of power modules 6 is set to four arranged at intervals on heat dissipation top plate 512 to adapt to different power requirements of vehicle-mounted charger.

[0122] Please refer to Fig. 1, in the present embodiment, the top end of shell 1 forms an opening 113 communicating with inner cavity 11, and the heat dissipation structure of vehicle-mounted charger further comprises:

[0123] top cover 17 covering and mounted at the opening 113 at the top end of shell 1 to close inner cavity 11; circuit board 7 mounted at the position corresponding to opening 113 in inner cavity 11 and located between the top end of heat dissipation chamber 112 and top cover 17, circuit board 7 is electrically connected to power module 6 and functional module 4; insulation layer 8, a plurality of insulation flanges 81 are arranged at intervals on the peripheral side of insulation layer 8, wherein the main body pad of insulation layer 8 is arranged between circuit board 7 and top cover 17 to form insulation protection between circuit board 7 and top cover 17; insulation flange 81 extends downward into inner cavity 11 and is arranged between power module 6, functional module 4 and shell 1 to form insulation protection between power module 6, functional module 4 and shell 1.

[0124] As a preferred embodiment of the present embodiment, the insulating layer 8 can be an insulating film or a hard insulating plastic layer. The insulating layer 8 made of hard insulating plastic material can not only play an insulating role, but also realize full-automatic assembly on the production line. The shape of the insulating layer 8 and the position of the insulating flange 81 can be adjusted according to the specific shape and position of the power module 6, the functional module 4 (EMC unit and magnetic element unit), and other modules.

[0125] Referring to FIG. 1, as a preferred embodiment of the present embodiment, the second EMC unit 42 and the first magnetic element unit 43 are respectively fixed and arranged in the front and rear heat dissipation chambers 112 on the left side (i.e., one end of the inner cavity 11 in the second horizontal direction Y) of the inner cavity 11 of the shell 1, and the first EMC unit 41 and the second magnetic element unit 44 are respectively fixed and arranged in the front and rear heat dissipation chambers 112 on the right side (i.e., the other end of the inner cavity 11 in the second horizontal direction Y) of the inner cavity 11 of the shell 1.

[0126] Referring to FIG. 1, as a preferred embodiment of the present embodiment, the filter unit 45 is a filter plate (and its components), which is vertically arranged in the inner cavity 11 of the shell 1 and is connected to the water channel wall of the three-dimensional water channel 3 through a heat-conducting structure or directly.

[0127] In other embodiments, the number, arrangement, and arrangement position of each functional module 4 and the corresponding number, arrangement, and arrangement position of the heat dissipation chamber 112 can be adjusted according to actual conditions.

[0128] In the present embodiment, each functional module 4 can be placed in the corresponding heat dissipation chamber 112 separately, and then electrically connected with the circuit board 7.

[0129] In other embodiments, each functional module 4 can be connected with the circuit board 7 and installed as a whole, and then arranged in the inner cavity 11 of the shell 1 together with the circuit board 7.

[0130] In the present embodiment, the power module 6 is first assembled on the heat dissipation structure 5 in the above-mentioned manner, and then the corresponding terminals of the power module 6 are welded with the circuit board 7.

[0131] In the present embodiment, the circuit board 7 is a PCB board, a power board, or a chip board.

[0132] Referring to FIGS. 1-6, the present application also provides a vehicle-mounted charger, which applies the above-mentioned vehicle-mounted charger heat dissipation structure, and the vehicle-mounted charger further comprises:

[0133] A plurality of plug-in modules 9 are arranged on the side of the shell 1.

[0134] In the present embodiment, the plug-in module 9 includes power terminals, power supply terminals, and the like.

[0135] In the embodiment, the vehicle-mounted charger further comprises a cooling circulation device (not shown in the figure) for driving the cooling liquid or cooling water to circulate and exchange heat between the above-mentioned planar water channel 2, the internal flow channel 50 of the heat dissipation structure 5, the three-dimensional water channel 3 and the external environment of the vehicle-mounted charger.

[0136] The working principle of the heat dissipation structure of the vehicle-mounted charger provided by the present application is as follows:

[0137] The cooling circulation device inputs the cooling liquid or cooling water from the water channel inlet 23 into the first longitudinal water channel 21, and the first longitudinal water channel 21 is internally provided with irregularly spaced multiple heat dissipation protrusions 123, which can increase the heat exchange area between the cooling liquid or cooling water and the first longitudinal water channel 21 and increase the flow rate, thereby improving the heat dissipation efficiency of the second EMC unit 42 and the first magnetic element unit 43 arranged on the left side of the inner cavity 11 of the shell 1.

[0138] After flowing through the first longitudinal water channel 21 and reaching the left water outlet end 1212 of the left water channel groove 121, the cooling liquid or cooling water enters the first vertical water channel 31 from the bottom water inlet 311 of the first vertical water channel 31, and then flows into the water inlet hole 521 of the water inlet joint 52 of the heat dissipation structure 5 and the flow channel water inlet end of the internal flow channel 50 of the heat dissipation structure 5 in sequence from the top water outlet 312 of the first vertical water channel 31, and then flows upward into the internal flow channel 50.

[0139] While flowing through the internal flow channel 50 and the heat dissipation fins 514 (which can be rectangular, diamond-shaped, circular or tooth-shaped, etc.) inside the internal flow channel 50, the cooling liquid or cooling water conducts heat dissipation to each power module 6 connected to the heat dissipation structure 5 through the heat conduction structure layer 62.

[0140] After flowing through the internal flow channel 50, the cooling liquid or cooling water flows downward into the second vertical water channel 32 in sequence through the flow channel water outlet end of the internal flow channel 50, the water outlet hole 531 of the water outlet joint 53 of the heat dissipation structure 5 and the top water inlet 322 of the second vertical water channel 32, and then flows downward into the right water inlet end 1221 of the right water channel groove 122 from the bottom water outlet 321 of the second vertical water channel 32 and reaches the inside of the second longitudinal water channel 22. The cooling liquid or cooling water can also conduct heat dissipation to the filter unit 45 when flowing through the first vertical water channel 31 and the second vertical water channel 32.

[0141] The second longitudinal water channel 22 is internally provided with heat dissipation protrusions 123 identical in function to those in the first longitudinal water channel 21, and the cooling liquid or cooling water will pass through these heat dissipation protrusions 123 again when flowing through the second longitudinal water channel 22, thereby improving the heat dissipation efficiency of the first EMC unit 41 and the second magnetic element unit 44 arranged on the right side of the inner cavity 11 of the shell 1. Finally, the cooling liquid or cooling water flows out through the water channel outlet 24 and returns to the cooling circulation device, and the above steps are repeated to complete the entire cooling circulation of the heat dissipation structure of the vehicle-mounted charger.

[0142] The above merely provides the preferred embodiments of the application, and is not intended to limit the application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the application shall fall within the protection scope of the application.

Claims

1. An on-vehicle charger heat dissipation structure characterized by comprising: The application relates to a shell (1) with an inner cavity (11) provided with a plane water channel (2) and a three-dimensional water channel (3) in communication with the plane water channel (2), wherein the inner cavity (11) is divided into multiple heat dissipation chambers (112) in communication with the plane water channel (2) and / or the three-dimensional water channel (3); multiple functional modules (4) are arranged in the heat dissipation chambers (112) respectively; a heat dissipation structure (5) is arranged in the inner cavity (11) and is in communication with the three-dimensional water channel (3) or the plane water channel (2) through an internal flow channel (50) in the heat dissipation structure (5); and at least one power module (6) is connected to the heat dissipation structure (5) or the three-dimensional water channel (3) or the plane water channel (2). The power module (6) is connected to the heat dissipation structure (5) through a heat conduction structure layer (62). The heat conduction structure layer (62) is a heat interface material layer, a heat conduction glue layer or a solder layer. The application further relates to a water channel inlet (23) and a water channel outlet (24) arranged on the shell (1) in a spaced manner; the three-dimensional water channel (3) comprises a first vertical water channel (31) and a second vertical water channel (32) arranged at one end of the inner cavity (11) in a spaced manner; the plane water channel (2) comprises a first longitudinal water channel (21) and a second longitudinal water channel (22) arranged on two sides of the bottom of the shell (1) in a spaced manner and connected to the water channel inlet (23), the first vertical water channel (31) and the water channel outlet (24), the second vertical water channel (32) respectively; the internal flow channel (50) is connected between the first vertical water channel (31) and the second vertical water channel (32); the first longitudinal water channel (21) and the second longitudinal water channel (22) are connected to a bottom inlet (311) of the first vertical water channel (31) and a bottom outlet (321) of the second vertical water channel (32) respectively; the heat dissipation structure (5) comprises a bridge arm main body (51) with the internal flow channel (50) arranged therein; a water inlet joint (52) and a water outlet joint (53) are arranged at two ends of the bottom of the bridge arm main body (51) in a spaced manner, and the water inlet joint (52) and the water outlet joint (53) are respectively provided with a water inlet hole (521) and a water outlet hole (531) arranged therein, wherein the water inlet hole (521) and the water outlet hole (531) are connected to a flow channel water inlet end of the internal flow channel (50) and a top outlet (312) of the first vertical water channel (31), and a flow channel water outlet end of the internal flow channel (50) and a top water inlet (322) of the second vertical water channel (32) respectively. ​ 2. The vehicle-mounted charger heat dissipation structure according to claim 1, wherein ​ 3. The vehicle-mounted charger heat dissipation structure according to claim 2, wherein ​ 4. The vehicle charger heat dissipation structure of claim 2, wherein, ​ ​ ​ ​ ​ ​ ​ 5. The vehicle-mounted charger heat dissipation structure according to claim 4, wherein ​ ​ ​ ​ 6. The vehicle-mounted charger heat dissipation structure of claim 5, wherein The outer surface of the bottom wall (12) of the shell (1) is spaced apart from left and right water channel grooves (121) and (122), the left water inlet end (1211) of the left water channel groove (121) and the right water outlet end (1222) of the right water channel groove (122) are respectively connected to the water inlet (23) and the water outlet (24), and the left water outlet end (1212) of the left water channel groove (121) and the right water inlet end (1221) of the right water channel groove (122) are respectively extended to one end of the bottom wall (12) opposite the water inlet (23) and the water outlet (24); the left water channel groove (121) and the right water channel groove (122) are both spaced apart from a plurality of heat dissipation protrusions (123); The vehicle-mounted charger heat dissipation structure further comprises: The water channel cover plate (13) is sealingly connected to the outer surface of the bottom wall (12) and surrounds the first longitudinal water channel (21) and the second longitudinal water channel (22) with the left water channel groove (121) and the right water channel groove (122) respectively.

7. The vehicle-mounted charger heat dissipation structure according to claim 6, wherein The inner surface of the bottom wall (12) facing the inner cavity (11) is spaced apart from first and second water channel columns (14) and (15) at one end opposite the water inlet (23) and the water outlet (24), the hollow interiors of the first and second water channel columns (14) and (15) correspondingly form the first and second vertical water channels (31) and (32) extending vertically, the bottom water inlet (311) and the bottom water outlet (321) are respectively connected to the left water outlet end (1212) and the right water inlet end (1221), and the top water outlet (312) and the top water inlet (322) are respectively provided on the top surfaces of the first and second water channel columns (14) and (15).

8. The vehicle-mounted charger heat dissipation structure of claim 7, wherein, The top surface of the first water channel column (14) at the connection of the top water outlet (312) forms a first mounting step (141) surrounding the first vertical water channel (31), the bottom surface of the first mounting step (141) is provided with a first sealing groove (1411) surrounding the first vertical water channel (31), and a first sealing ring (142) is embedded in the first sealing groove (1411); The top surface of the second water channel column (15) at the connection of the top water inlet (322) forms a second mounting step (151) surrounding the second vertical water channel (32), the bottom surface of the second mounting step (151) is provided with a second sealing groove (1511) surrounding the second vertical water channel (32), and a second sealing ring (152) is embedded in the second sealing groove (1511); The water inlet connector (52) is mounted on the first mounting step (141) and makes the water inlet hole (521) opposite the top water outlet (312), and the end of the water inlet connector (52) presses the first sealing ring (142); The water outlet joint (53) is installed on the second mounting step (151), and the water outlet hole (531) is connected with the top water inlet (322), and the end of the water outlet joint (53) is pressed against the second sealing ring (152).

9. The vehicle-mounted charger heat dissipation structure of claim 8, wherein, The outer side of the water inlet joint (52) is provided with a third sealing groove (522) which is circumferentially arranged, and the third sealing groove (522) is embedded with a third sealing ring (5221); The outer side of the water outlet joint (53) is provided with a fourth sealing groove (532) which is circumferentially arranged, and the fourth sealing groove (532) is embedded with a fourth sealing ring (5321); When the water inlet joint (52) is installed on the first mounting step (141), the inner side of the first mounting step (141) is pressed against the third sealing ring (5221); When the water outlet joint (53) is installed on the second mounting step (151), the inner side of the second mounting step (151) is pressed against the fourth sealing ring (5321).

10. The vehicle charger heat sink structure of any of claims 5-9, wherein, The bridge arm body (51) comprises: A heat dissipation bottom plate (511), the two ends of the bottom of the heat dissipation bottom plate (511) are spaced apart to provide the water inlet joint (52) and the water outlet joint (53), and the water inlet hole (521) and the water outlet hole (531) correspond to the top surface of the heat dissipation bottom plate (511) at the two ends, respectively; A heat dissipation top plate (512), the bottom surface of the heat dissipation top plate (512) is provided with a flow channel groove (5121), and the two ends of the flow channel groove (5121) correspond to the positions covering the water inlet hole (521) and the water outlet hole (531), respectively; a plurality of heat dissipation fins (514) are arranged in the flow channel groove (5121); The heat dissipation top plate (512) and the heat dissipation bottom plate (511) are connected in a bridge arm body (51) in an upper and lower manner, and the heat dissipation bottom plate (511) and the flow channel groove (5121) form the internal flow channel (50); The power module (6) is connected to the top surface of the heat dissipation top plate (512) away from the heat dissipation bottom plate (511) through the heat conduction structure layer (62).

11. The vehicle charger heat sink structure of any one of claims 1-9, wherein, The functional module (4) comprises: A first EMC unit (41), a second EMC unit (42), a first magnetic element unit (43), and a second magnetic element unit (44) are arranged in the heat dissipation chamber (112) connected to the planar water channel (2), respectively; A filter unit (45) is arranged in the heat dissipation chamber (112) connected to the planar water channel (2) and the three-dimensional water channel (3) at the same time.

12. The vehicle charger heat sink structure of any one of claims 1-9, wherein, The top end of the shell (1) forms an opening (113) communicating with the inner cavity (11), and the vehicle-mounted charger heat dissipation structure further comprises: A top cover (17) is installed at the opening (113) to close the inner cavity (11); A circuit board (7) is installed at the opening (113) of the inner cavity (11) and located between the top end of the heat dissipation chamber (112) and the top cover (17), and the circuit board (7) is electrically connected to the power module (6) and the functional module (4); An insulation layer (8) is provided with a plurality of insulation flanges (81) at its periphery, and the insulation layer (8) is arranged between the top cover (17) and the circuit board (7), and the insulation flanges (81) extend into the inner cavity (11) and are arranged between the power module (6), the functional module (4) and the shell (1).

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