CN212587337U

CN212587337U - Magnetic device and voltage conversion device

Info

Publication number: CN212587337U
Application number: CN202022241030.5U
Authority: CN
Inventors: 冯颖盈; 姚顺; 张昌盛; 罗耀文; 肖伟军
Original assignee: Shenzhen Vmax Power Co Ltd
Current assignee: Shenzhen Vmax Power Co Ltd; Shenzhen VMAX New Energy Co Ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-02-23
Anticipated expiration: 2030-10-10

Abstract

The utility model discloses a magnetism device and voltage conversion equipment, including the skeleton, install line cake and copper bar winding in the skeleton, install the magnetic core on the skeleton, the copper bar winding includes a plurality of copper bar winding pieces that set up with the line cake interval, at least one the link at the both ends of copper bar winding piece is equipped with the heat dissipation foot, be connected through the heat conduction material between the casing of heat dissipation foot and installation magnetism device. The utility model discloses an edge at the link of copper bar winding piece sets up the heat dissipation foot, and the heat dissipation foot can be connected through the heat conduction material with between the casing of installation magnetic device. The heat accessible heat-conduction that makes itself be the copper bar winding of the source that generates heat of magnetic device transmits away, and the radiating efficiency that directly will generate heat the heat derivation in source is high, is superior to the heat conduction mode among the prior art far away. Meanwhile, the copper winding is designed to be of a single-chip structure, so that assembly and cost control are facilitated.

Description

Magnetic device and voltage conversion device

Technical Field

The utility model relates to a pure electronic, mix the car technique of charging and voltage transformation field, especially involve on-vehicle charger OBC, voltage converter DCDC and relevant integrated product's magnetism device and voltage conversion equipment.

Background

With the requirements of energy conservation, emission reduction and air pollution control, new energy automobiles are gradually commercialized in the market, and electric automobiles are more the main force of the new energy automobiles. Electric vehicles are further classified into pure electric vehicles and hybrid electric vehicles, wherein a vehicle-mounted charger OBC and a voltage converter DCDC are important components of the electric vehicles. At present, the OBC of the vehicle-mounted charger, the DCDC or related integrated products are mounted on the shell through the magnetic parts, heat dissipation is achieved by adding heat conduction materials between the magnetic core of the magnetic parts and the shell, heat conduction is achieved through the magnetic core of the magnetic parts, and direct heat conduction of the non-heat-source copper winding is achieved, so that the heat dissipation effect is poor, and the heat dissipation mode of the scheme cannot meet the heat dissipation requirements of the magnetic parts.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the not good technical problem of radiating effect of above-mentioned magnetic device among the prior art, provide a magnetic device and voltage conversion equipment.

The utility model adopts the technical proposal that:

the utility model provides a magnetic device, including the skeleton, install line cake and copper bar winding in the skeleton, install the magnetic core on the skeleton, the copper bar winding includes a plurality of copper bar winding pieces that set up with the line cake interval, at least one the link at the both ends of copper bar winding piece is equipped with the heat dissipation foot, be connected through the heat conduction material between the casing of heat dissipation foot and installation magnetic device.

The skeleton includes: first skeleton and the second skeleton of installing at first skeleton middle part, the copper bar winding with the line cake is installed on the second skeleton, first skeleton one side is equipped with the binding post of connecting the line cake, and the opposite side is equipped with the connecting seat of the link that corresponds copper bar winding piece.

Furthermore, the second framework is provided with a plurality of line cake assembling grooves at intervals from top to bottom, and every two adjacent line cake assembling grooves are provided with a copper bar winding assembling groove for inserting a copper bar winding sheet.

Parallel copper bar winding piece stretches out after the link of copper bar winding piece is buckled downwards, and the distance the connecting seat is far away the height of buckling of copper bar winding piece more big, makes a plurality of the link of copper bar winding piece is together, and the distance on the casing the heat conduction material is nearest the link of copper bar winding piece stretches out the laminating the heat conduction material the heat dissipation foot.

Preferably, the notch of the copper bar winding assembly groove inserted into the copper bar winding sheet is located on one side of the first framework, and the outer edge of the copper bar winding sheet is provided with a salient point protruding out of the copper bar winding assembly groove and located on the other side of the first framework.

The magnetic core includes: install the I type magnetic core in first skeleton bottom, install the E type magnetic core with the laminating of I type magnetic core on the second skeleton, first skeleton and second skeleton are passed to the center pillar of E type magnetic core, and the relative both sides of second skeleton are pressed close to two side posts.

The utility model also provides a voltage conversion equipment, including casing and PCB board, still include foretell magnetism device of installing on the casing. A set of screws penetrate through the PCB and are connected with the connecting terminals, and another set of screws penetrate through the connecting ends of the PCB and the copper bar winding sheet and are connected with the connecting seat.

Furthermore, the shell is provided with a plurality of threaded connecting seats, and the threaded connecting seats are provided with pressing strips which are fixed and pressed on the top of the magnetic core through screws.

Preferably, the voltage conversion device is an on-board charger OBC or a voltage converter DCDC.

Compared with the prior art, the utility model discloses an edge at the link of copper bar winding piece sets up the heat dissipation foot, and the heat dissipation foot can be connected through the heat conduction material with between the casing of installation magnetism device. The heat accessible heat-conduction that makes itself be the copper bar winding of the source that generates heat of magnetic device transmits away, and the radiating efficiency that directly will generate heat the heat derivation in source is high, is superior to the heat conduction mode among the prior art far away. Meanwhile, the copper bar winding is designed to be of a single-chip structure, so that assembly and cost control are facilitated, the tail of the copper bar winding is designed to be a step type salient point, and subsequent glue dispensing is facilitated to fix the copper bar winding on a PCB and a framework. And the line cake is independently wound on the framework, so that the operation is convenient, and the line cake assembly is facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is an exploded view of a magnetic device in an embodiment of the present invention;

fig. 2 is a schematic structural diagram in an embodiment of the present invention;

fig. 3 is a front view of a second frame in an embodiment of the present invention;

fig. 4 is a cross-sectional view of a second frame in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of the left side of the magnetic device in the embodiment of the present invention;

fig. 6 is a schematic structural diagram of the right side of the magnetic device in the embodiment of the present invention;

fig. 7 is a schematic view illustrating an installation of a connection terminal according to an embodiment of the present invention;

fig. 8 is an exploded view of an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a magnetic device in an embodiment of the present invention;

fig. 10 is a top view of an embodiment of the present invention.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in fig. 1 and fig. 2, the present invention provides a magnetic device, including: the copper bar winding comprises a framework 1, a line cake 2, a copper bar winding 3 and a magnetic core 4, wherein the framework 1 is an insulating support member for mounting the line cake 2, the copper bar winding 3 and the magnetic core 4, the line cake 2 and the copper bar winding 3 are mounted in the framework 1, the line cake 2 and a copper bar winding sheet 31 forming the copper bar winding 3 are crossed and spaced, namely, a copper bar winding sheet 31 is arranged between every two adjacent wire cakes 2, the two ends of each copper bar winding sheet 31 are connecting ends 32 parallel to the main body of the copper bar winding sheet 31, and all the copper row winding sheets 31 together form three connection ends 32 which are overlapped together, the connection ends 32 are specifically connection sheets with round holes through which screws can pass, so that the overlapped connection ends 32 can be conducted and fixed through the passing of the screws, and the edge of the connecting end 32 of the copper bar winding sheet 31 closest to the lower part of the framework horizontally extends out of the heat dissipation foot 33, and the heat dissipation foot 33 can be connected with the shell 5 for mounting the magnetic device through a heat conduction material 53. Make the heat accessible heat-conduction transmission of copper bar winding 3 go out, realize the heat dissipation demand, and the copper bar winding itself is the source that generates heat of magnetic device, and the radiating efficiency that the heat in the source that directly will generate heat derived is high, is superior to the heat conduction mode among the prior art far away.

As shown in fig. 2, the framework 1 specifically includes a first framework 11 and a second framework 12, the middle part of the first framework 11 is a disc-shaped mounting platform, the middle part of the mounting platform is provided with a preformed hole capable of passing through the magnetic core 4, the second framework 12 is mounted on the mounting platform at the middle part of the first framework 11, the mounting platform is provided with a bayonet, the bottom of the second framework 12 is provided with a buckle, the first framework 11 is connected with the second framework 12 through the buckle, and the mounting and dismounting are facilitated.

The right side of first skeleton 11 is equipped with binding post 111 of two connecting line cakes 2, as shown in fig. 7, the both ends of binding post 111 are equipped with bayonet 112, are equipped with the buckle 113 rather than corresponding on the first skeleton 11, make binding post 111 can be connected with first skeleton 11 buckle, the output promptly. The wiring terminal 21 can be connected and conducted with the PCB through a screw, and the first framework 11 is just opposite to a threaded hole, provided with the corresponding screw, below the wiring terminal 21 for positioning.

Two connecting seats 114 with threaded holes are arranged on the left side of the first framework 11, the connecting ends 32 of the copper bar winding sheets 31 are stacked on the connecting seats 114, and the copper bar winding 3 is communicated with the PCB by passing through holes in the PCB and the connecting ends 32 through screws to be fixed with the connecting seats 114. And all the copper bar winding sheets 31 of the copper bar winding 3 together form three connection ends 32 which are overlapped together, and the middle one of the connection ends 32 is placed on the second connection seat arranged on the shell. As shown in fig. 5, the left side of the first frame 11 is provided with limiting plastics 115 at two sides of the three-folded-together connecting end, so that the connecting ends of the copper bar winding pieces cannot be deviated when being folded, and the installation difficulty is reduced.

The second frame 12 is a hollow cylinder, and the hollow position of the second frame is opposite to the preformed hole on the first frame 11 for passing through the magnetic core 4. As shown in fig. 3 and 4, the second frame 12 is provided with a plurality of coil cake assembling grooves 121 at intervals from top to bottom in parallel, a copper bar winding assembling groove 122 for inserting the copper bar winding sheet 31 is arranged between every two adjacent coil cake assembling grooves 121, the second frame 12 is installed on the first frame 11, the copper bar winding assembling groove 122 is used for inserting the notch of the copper bar winding sheet 32 towards the left side, so that the connecting end 32 of the copper bar winding sheet 32 can be stacked on the connecting seat 114 on the left side of the first frame, and meanwhile, the copper bar winding sheet 32 has a single-chip structure, which is beneficial to assembly and cost control, and is simple and convenient to install.

As shown in fig. 5, the copper bar winding piece 31 is bent into a ring shape to make the connection ends 32 at the two ends close together, and the connection end 32 is bent downward and then the parallel copper bar winding piece 31 extends out, the bending height of the copper bar winding piece 31 closer to the upper part of the second frame 12 is larger, so that the connection ends of the plurality of copper bar winding pieces 31 are overlapped together, and the connection end of the copper bar winding piece 32 at the bottommost part extends out of the heat dissipation foot. As shown in fig. 6, the outer edge of the tail portion of the copper bar winding piece 32 is provided with the protruding bumps 34 protruding in parallel, the bumps 34 protrude out of the copper bar winding assembly groove 122, the copper bar winding assembly groove 122 is provided with the notches corresponding to the bumps 34, and the protrusions are located on the right side of the second framework 12, so that the copper bar winding 3 forms a plurality of stepped bumps 34 on the right side surface of the second framework 12, and subsequent glue dispensing can be conveniently performed to fix the copper bar winding piece on a PCB board and the framework.

As shown in fig. 4, the notch of the wire cake mounting groove 121 surrounds the side wall of the second frame 12, and the width between the upper and lower sides of the notch is equal to the thickness of the wire cake 2, so that the wire cake 2 can be directly formed by winding on the second frame 12, the winding difficulty is reduced, and the winding precision can be improved.

The magnetic core 4 includes: i type magnetic core 41 and E type magnetic core 42 of mutual concatenation, the bottom at first skeleton 11 is installed to I type magnetic core 41, the top of second skeleton 12 that E type magnetic core 42 was detained, the center pillar of E type magnetic core 42 passes the center of first skeleton 11 and second skeleton 12 and the middle part concatenation of the I type magnetic core 41 that is located first skeleton bottom, the relative both sides that second skeleton 12 is pressed close to two side columns splice with the both ends that are located the I type magnetic core 41 of first skeleton 11 bottom, the top that second skeleton 12 is located E type magnetic core 42 both sides limit simultaneously is equipped with spacing rib, the location installation of E type magnetic core 42 of being convenient for, prevent E type magnetic core installation back lateral shifting simultaneously.

As shown in fig. 8, the present invention further includes a voltage converting device, which includes a housing 5, a PCB 6 and the above-mentioned magnetic device. The casing 5 is provided with an installation position corresponding to the magnetic device, and limit buckles are arranged at intervals around the installation position to limit the transverse movement of the magnetic device on the casing 5, heat conducting seats 52 are arranged on two sides of the casing 5, which are provided with second connecting seats 51, and heat conducting materials 53 are arranged on the heat conducting seats 52. As shown in fig. 2, after the magnetic device is mounted, the heat dissipation pins 33 of the copper bar winding 3 press against the heat conductive material 53, and the heat is conducted to the housing.

Two threaded connecting seats 54 with threaded holes for mounting screws are arranged on the shell 5, a pressing strip 55 which is fixedly pressed on the top of the magnetic core 4 through screws is arranged on each threaded connecting seat 54, and the movement of the magnetic device in the longitudinal direction can be limited through the pressing strip 55, so that the magnetic device is fixed on the shell 5.

As shown in fig. 9 and 10, the first frame is further provided with a plurality of positioning posts 116 extending vertically upward, and the PCB 6 is provided with openings corresponding to the positioning posts 116 for positioning when the PCB is mounted.

In specific embodiment, voltage conversion device specifically can be for on-vehicle machine OBC or the voltage change ware DCDC that charges, still can be for other devices that take the voltage transformation demand, all be in the utility model discloses a within the scope of protection.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a magnetic device, includes the skeleton, installs line cake and copper bar winding in the skeleton, installs the magnetic core on the skeleton, its characterized in that, the copper bar winding includes a plurality of copper bar winding pieces that set up with the line cake interval, at least one the link at the both ends of copper bar winding piece is equipped with the heat dissipation foot, be connected through the heat conduction material between the casing of heat dissipation foot and installation magnetic device.

2. The magnetic device of claim 1, wherein the backbone comprises: the copper bar winding comprises a first framework with a mounting platform and a second framework installed on the mounting platform, wherein a wiring terminal for connecting a wire cake is arranged on one side of the mounting platform, a connecting seat corresponding to the connecting end of a copper bar winding sheet is arranged on the other side of the mounting platform, and the copper bar winding and the wire cake are installed on the second framework.

3. The magnetic device according to claim 2, wherein the second frame is provided with a plurality of coil block assembling grooves at intervals from top to bottom, and a copper bar winding assembling groove for inserting a copper bar winding sheet is arranged between every two adjacent coil block assembling grooves.

4. The magnetic device according to claim 2, wherein the connecting ends of the copper bar winding pieces are bent downward and then the parallel copper bar winding pieces extend out, the farther from the connecting seat, the larger the bending height of the copper bar winding pieces, the more the connecting ends of the copper bar winding pieces are stacked together, and the connecting end of the copper bar winding piece closest to the heat conductive material on the housing extends out to be attached to the heat dissipation pin of the heat conductive material.

5. The magnetic device according to claim 3, wherein the notch of the copper bar winding assembly slot into which the copper bar winding piece is inserted is located on one side of the first bobbin, and the outer edge of the copper bar winding piece is provided with a protruding point protruding out of the copper bar winding assembly slot on the other side of the first bobbin.

6. The magnetic device of claim 2, wherein the magnetic core comprises: install the I type magnetic core in first skeleton bottom, install the E type magnetic core with the laminating of I type magnetic core on the second skeleton, first skeleton and second skeleton are passed to the center pillar of E type magnetic core, and the relative both sides of second skeleton are pressed close to two side posts.

7. A voltage conversion device comprising a housing and a PCB board, further comprising said magnetic device mounted on the housing as claimed in any one of claims 1 to 6.

8. The voltage conversion device as claimed in claim 7, wherein one set of screws is connected to the connection terminals through the PCB board, and the other set of screws is connected to the connection sockets through the PCB board and the connection terminals of the copper row winding pieces.

9. The voltage conversion device as claimed in claim 7, wherein the housing is provided with a plurality of screw coupling seats, and the screw coupling seats are provided with pressing strips which are fixed and pressed on the top of the magnetic core by screws.

10. The voltage conversion device according to claim 7, wherein the voltage conversion device is an onboard charger or a voltage changer.