Transformer and charging equipment

Abstract

The utility model provides a transformer and charging equipment, and relates to the technical field of new energy, the transformer comprises a magnetic core, a plurality of windings and at least one spacer, and the number of the spacers is smaller than that of the windings; the plurality of windings are wound on a magnetic core middle column of the magnetic core, and one spacer is arranged between any two adjacent windings. According to the technical scheme, only one spacer is arranged between the adjacent windings, the usable space of the windings in the magnetic core can be increased, and therefore the number of winding strands of the windings can be increased, heat generated by the windings can be reduced, heat generated by a transformer obtained based on small-size magnetic core design can be reduced, and the service life of the transformer is prolonged. The heat dissipation performance of the transformer can be improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of new energy, and particularly relates to a transformer and a charging device. BACKGROUND

[0002] With the continuous development of electric vehicles (hereinafter referred to as electric vehicles), charging piles for charging electric vehicles are gradually popularized, and the charging piles can include a charging module and a charging interface.

[0003] In the related art, the size of the LLC transformer, which is a core component of the charging module, affects the size of the charging module. The LLC transformer is usually formed by a combination of a resonant inductor winding and a main transformer.

[0004] However, due to the small size of the charging module, the LLC transformer is also designed with a small-size magnetic core, which greatly affects the heat dissipation of the LLC transformer. Invention content

[0005] The application provides a transformer and a charging device, which solves the problem that in the prior art, due to the small size of the charging module, the LLC transformer is also designed with a small-size magnetic core, which greatly affects the heat dissipation of the LLC transformer.

[0006] To achieve the above-mentioned purpose, the application adopts the following technical solutions:

[0007] In a first aspect, the application provides a transformer, which comprises a magnetic core, a plurality of windings and at least one spacer, the number of the spacers being less than the number of the windings.

[0008] The plurality of windings are wound on a magnetic core column of the magnetic core, and any two adjacent windings are provided with one spacer.

[0009] Optionally, the magnetic core comprises a magnetic core column and a plurality of magnetic core side columns, and the magnetic core column is arranged in a space formed by the plurality of magnetic core side columns.

[0010] The magnetic core side column comprises a plurality of side column segments, and the plurality of side column segments are connected by a heat-conducting sheet.

[0011] Optionally, the heat-conducting sheet is composed of at least one material selected from the group consisting of a ceramic substrate, a heat-conducting silicon sheet and a vacuum cavity.

[0012] Optionally, the magnetic core column comprises a plurality of core column segments, and the plurality of core column segments are connected by a connecting piece, and the center points of the cross sections of each core column segment coincide.

[0013] Optionally, the connecting member comprises at least one magnetic column, a plurality of ceramic gaskets and a glue body for connecting the magnetic column, the ceramic gaskets and the middle column segment.

[0014] Optionally, the glue body is a heat-conducting silica gel sheet or a filling glue.

[0015] Optionally, each of the two ends of the magnetic core is provided with a magnetic yoke, and a plane where each of the magnetic yokes is located is perpendicular to an axis of the magnetic core.

[0016] Each of the magnetic yokes is provided with at least one heat dissipation groove located at an edge of the magnetic yoke.

[0017] Optionally, each of the two ends of the magnetic core is provided with a magnetic yoke, and a plane where each of the magnetic yokes is located is perpendicular to an axis of the magnetic core, and each of the magnetic yokes is provided with a ventilation hole in a regular shape.

[0018] Optionally, a center point of the ventilation hole coincides with an axis of the middle column of the magnetic core.

[0019] In a second aspect, an embodiment of the present application provides a charging device, which comprises a charging module, a charging interface and a power distribution unit, the charging module comprises the transformer as any one of the first aspect.

[0020] The charging module is configured to supply power to the power distribution unit.

[0021] The power distribution unit is configured to adjust a charging power when the charging module supplies power, and supply power to the charging interface according to the adjusted charging power.

[0022] The charging interface is configured to charge a device according to the adjusted charging power.

[0023] The transformer provided by the embodiment of the present application can increase the number of winding strands of the winding by winding a plurality of windings on the middle column of the magnetic core and arranging a spacer between any two adjacent windings, thereby reducing the heat generated by the winding, reducing the heat generated by the transformer designed based on a small-size magnetic core, and improving the heat dissipation performance of the transformer. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A device schematic diagram corresponding to a charging device where a charging module of a transformer involved in the embodiment of the present application is located;

[0025] Figure 2 A structural schematic diagram of a transformer provided by the embodiment of the present application;

[0026] Figure 3 A structural schematic diagram of a magnetic yoke provided for an embodiment of the present application is shown in FIG. 1.

[0027] Figure 4 A structural schematic diagram of a magnetic core provided for an embodiment of the present application is shown in FIG. 2.

[0028] Figure 5 A structural schematic diagram of a magnetic core side column of a magnetic core provided for an embodiment of the present application is shown in FIG. 3.

[0029] Figure 6 A structural schematic diagram of a magnetic core middle column of a magnetic core provided for an embodiment of the present application is shown in FIG. 4. DETAILED DESCRIPTION

[0030] In the following description, for purposes of explanation and not limitation, specific details are set forth, such as a particular structure, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, algorithms, and electronic devices are omitted so as not to obscure the description of the present application with unnecessary detail.

[0031] The terminology used in the following description merely for the purpose of describing particular embodiments and is not intended to limit the application. As used in this description and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0032] With the continuous development of electric vehicles (hereinafter referred to as electric vehicles), charging piles for charging electric vehicles are gradually popularized, which can include charging modules, charging interfaces, etc.

[0033] In the related art, the size of the LLC transformer, a core component of the charging module, affects the size of the charging module. The LLC transformer is usually formed by combining a resonant inductor winding and a main transformer.

[0034] However, due to the small size of the charging module, the LLC transformer is also designed with a small-size magnetic core, which greatly affects the heat dissipation of the LLC transformer.

[0035] Therefore, the transformer provided by the embodiment of the present application can increase the space available for the windings in the magnetic core by arranging only one spacer between the adjacent windings, thereby increasing the number of winding strands of the windings, and further reducing the heat generated by the windings, reducing the heat generated by the transformer designed based on the small-size magnetic core, and improving the heat dissipation performance of the transformer.

[0036] Referring to Figure 1 , Figure 1 The device schematic diagram corresponding to the charging equipment in which the charging module of the transformer provided by the embodiment of the present application is located. The charging equipment can include a charging module 10, a charging interface 20, and a power distribution unit 30.

[0037] The charging module 10 can include a transformer 11.

[0038] Moreover, the power distribution unit 30 is connected with the charging module 10 and the charging interface 20.

[0039] Correspondingly, the charging module 10 can output the adjusted voltage through the transformer 11, thereby supplying power to the power distribution unit 30. The power distribution unit 30 can adjust the charging power when supplying power to the charging module 10, and supply power to the charging interface 20 according to the adjusted charging power. The charging interface 20 can charge the equipment according to the adjusted charging power, that is, the charging equipment 10 can charge the electric vehicle through the charging interface 20.

[0040] It should be noted that, in actual application, the charging equipment can be a charging pile or other devices capable of charging. The type of the charging equipment is not limited in the embodiment of the present application. In addition, the embodiment of the present application takes the electric vehicle as an example for description. However, in actual application, the charging equipment can also charge the electric bicycle, the electric motorcycle, or other electric travel equipment, which is not limited in the embodiment of the present application.

[0041] The transformer in the charging module is described in detail below.

[0042] Figure 2 The structural schematic diagram of the transformer provided by the embodiment of the present application is described as an example but not limitation, and is applied to the charging module described above. Referring to Figure 2 The transformer can include a magnetic core 210, a plurality of windings 220, and at least one spacer 230.

[0043] The number of the spacers 230 is less than the number of the windings 220. For example, if the transformer includes two windings 220, one spacer 230 can be arranged between the two windings 220; if the transformer includes ten windings 220, nine spacers 230 can be arranged between the windings 220; that is, the number of the spacers 230 is less than the number of the windings 220 by one.

[0044] In addition, the plurality of windings 220 can be wound on the magnetic core columns of the magnetic core 210, and one spacer 230 can be arranged between any two adjacent windings 220 to space the windings 220. Arranging only one spacer 230 between the two windings 220 can increase the space available for the windings 220 in the magnetic core 210, thereby increasing the number of winding strands of the windings, reducing the current density of the windings 220, and reducing the temperature of the wire package composed of the windings 220.

[0045] In an optional embodiment, Figure 3 A structural schematic diagram of a magnetic yoke provided by the embodiment of the present application is shown in Figure 3 Both ends of the magnetic core 210 can be provided with a magnetic yoke 211, and each magnetic yoke 211 is provided with at least one heat dissipation groove 211a located at the edge of the magnetic yoke 211.

[0046] The plane where each magnetic yoke 211 is located is perpendicular to the axis of the magnetic core 210. In addition, the ratio between the area of the heat dissipation groove 211a and the area of the magnetic yoke 211 can be determined according to the actual required magnetic flux density, and the present embodiment does not make specific limitations on the ratio.

[0047] As shown in Figure 3 , the edge of the heat dissipation groove 211a close to the center of the magnetic yoke 211 is parallel to the edge of the magnetic yoke 211, thereby forming a planar vent, which can effectively reduce the wind resistance of the transformer, thereby improving the ventilation effect of the transformer to improve the heat dissipation effect of the transformer.

[0048] Similarly, referring to Figure 3 , on the basis of being provided with the magnetic yoke 211, each magnetic yoke 211 can be further provided with a ventilation hole 211b for further heat dissipation of the magnetic core columns of the magnetic core 210.

[0049] The center point of the ventilation hole 211b can coincide with the axis corresponding to the magnetic core column of the magnetic core 210. In addition, the ventilation hole 211b is in a regular shape, for example, the ventilation hole 211b can be circular, rectangular or other regular shapes, and the present embodiment does not make specific limitations on the shape of the ventilation hole 211b.

[0050] In an optional embodiment, referring toFigure 4 and 5 , Figure 4 A structural schematic diagram of a magnetic core provided by an embodiment of the present application, Figure 5 A structural schematic diagram of a magnetic core side column of a magnetic core provided by an embodiment of the present application, the magnetic core 210 can further include: a plurality of magnetic core side columns 212 and a magnetic core middle column 213.

[0051] The magnetic core middle column 213 is arranged in the space formed by the magnetic core side column 212. Correspondingly, the plurality of windings 220 can be wound on the surface of the magnetic core middle column 213.

[0052] Further, the magnetic core side column 212 can include a plurality of side column segments 212a, and the plurality of side column segments 212a can be connected by a heat conduction sheet.

[0053] The heat conduction sheet can be composed of at least one of ceramic substrate, heat-conducting silicon sheet and vacuum cavity all-heating plate. Correspondingly, each side column segment 212a can transfer heat to other side column segments 212a through the heat conduction sheet, so that the magnetic core middle column 213 can maintain thermal equilibrium.

[0054] Furthermore, referring to Figure 6 , Figure 6 A structural schematic diagram of a magnetic core middle column of a magnetic core provided by an embodiment of the present application, the magnetic core middle column 213 can include a plurality of middle column segments 213a, and the plurality of middle column segments 213a can be connected by a connecting piece, that is, the magnetic core middle column 213 can be composed of a plurality of middle column segments 213a.

[0055] For example, the magnetic core middle column 213 can be composed of three middle column segments 213a connected by two connecting pieces.

[0056] Furthermore, the cross section of the magnetic core middle column 213 can be circular, square, rectangular or other regular shape, and the cross section of each middle column segment 213a is consistent with the cross section of the magnetic core middle column 213, and the center points of the cross sections of each middle column segment 213a coincide.

[0057] Further, the connecting piece can include at least one magnetic column, a plurality of ceramic gaskets and a colloid, and the colloid is used to connect the magnetic column, the ceramic gasket and the middle column segment 213a.

[0058] The colloid can be a heat-conducting silicone sheet or a filling glue, and the embodiment of the present application does not make specific limitation on the colloid.

[0059] For example, each connecting piece can include one magnetic column and two ceramic pads, and the two ceramic pads can be respectively located at two ends of the magnetic column, and the magnetic column, the ceramic pads and the middle column segment 213a are connected by the glue. Each connecting piece can also include two magnetic columns, two ceramic pads and a heat-conducting silica gel sheet, and the two ceramic pads can be respectively arranged at two ends of one magnetic column, and the other magnetic column is connected with the magnetic column through any ceramic pad and connected with the two middle column segments 213a through the heat-conducting silica gel sheet.

[0060] It should be noted that in actual application, the parameters of each component in the selected connecting piece can be selected according to actual needs. For example, a magnetic column with a length of 5 millimeters (mm) and a ceramic pad with a length of 0.5 mm can be selected, and the thermal conductivity of the ceramic pad is greater than 2.0. Moreover, if the connecting piece includes multiple magnetic columns, the bonding gap between any two adjacent magnetic columns is less than or equal to 0.1 mm, and the parameters of each component in the connecting piece are not limited in the embodiments of the present application.

[0061] In summary, the transformer according to the embodiments of the present application can wind multiple windings on the middle column of the magnetic core, and an interval piece is arranged between any two adjacent windings. By arranging only one interval piece between the adjacent windings, the space available for the windings in the magnetic core can be increased, thereby the number of winding strands of the windings can be increased, and the heat generated by the windings can be reduced. The heat generated by the transformer designed based on the small-size magnetic core can be reduced, and the heat dissipation performance of the transformer can be improved.

[0062] Moreover, by arranging an interval piece between the two windings, the space between the windings and one end of the magnetic core can be further increased, thereby the thermal stress of the magnetic core can be effectively reduced.

[0063] In addition, by arranging the heat dissipation grooves on the yoke, the planar ventilation openings can be formed, thereby the wind resistance of the transformer can be effectively reduced, and the ventilation effect of the transformer can be improved, so as to improve the heat dissipation effect of the transformer.

[0064] Further, by arranging the ventilation holes on the yoke, the middle column of the magnetic core can be further cooled through the ventilation holes, thereby the heat dissipation effect of the transformer can be improved.

[0065] It should be noted that by forming the side column of the magnetic core by multiple side column segments and forming the middle column of the magnetic core by multiple middle column segments, the heat can be transferred through the heat-conducting sheets and the connecting pieces, so that the middle column of the magnetic core is kept in thermal balance, and the heat dissipation effect of the transformer is further improved.

[0066] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0067] Those skilled in the art can appreciate that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0068] In the embodiments provided in the present application, it should be understood that the disclosed apparatuses / devices and methods can be implemented in other ways. For example, the above-described apparatus / device embodiments are merely illustrative. For example, the division of the modules or units is merely a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or in other forms.

[0069] It should be understood that when used in the specification and the appended claims of the present application, the term "comprising" indicates the presence of the described features, integers, steps, operations, elements, and / or components, but does not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0070] It should also be understood that the term "and / or" as used in the specification and the appended claims of the present application means any combination of one or more of the associated listed items and all possible combinations thereof.

[0071] As used in the specification and the appended claims of the present application, the term "if" can be interpreted as "when" or "upon" or "in response to a determination" or "in response to detecting" depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be interpreted as meaning "upon determining" or "in response to determining" or "upon detecting [a described condition or event]" or "in response to detecting [a described condition or event]" depending on the context.

[0072] In addition, in the description of the specification and the appended claims of the present application, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0073] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A transformer, characterized by The transformer comprises a magnetic core, a plurality of windings and at least one spacer, the number of the spacers being less than the number of the windings; Each of the plurality of windings is wound on a magnetic core column of the magnetic core, and one of the spacers is arranged between any two adjacent windings; The magnetic core comprises a magnetic core column and a plurality of magnetic core side columns, and the magnetic core column is arranged in a space formed by the plurality of magnetic core side columns; The magnetic core side column comprises a plurality of side column segments, and the plurality of side column segments are connected by a heat conduction sheet.

2. The transformer of claim 1, wherein, The heat conduction sheet is composed of at least one of ceramic substrate, heat conduction silicon sheet and vacuum cavity.

3. The transformer of claim 1, wherein, The magnetic core column comprises a plurality of magnetic core column segments, and the plurality of magnetic core column segments are connected by a connecting piece, and the center points of the cross sections of each of the plurality of magnetic core column segments coincide.

4. The transformer of claim 3, wherein, The connecting piece comprises at least one magnetic column, a plurality of ceramic gaskets and a colloid, and the colloid is used to connect the magnetic column, the ceramic gasket and the magnetic core column segment.

5. The transformer of claim 4, wherein, The colloid is a heat conduction silica gel sheet or a filling glue.

6. The transformer of any one of claims 1 to 5, wherein, Both ends of the magnetic core are provided with a magnetic yoke, and a plane where each of the magnetic yokes is located is perpendicular to an axis of the magnetic core. Each of the magnetic yokes is provided with at least one heat dissipation groove, and the heat dissipation groove is located at an edge of the magnetic yoke.

7. The transformer of any one of claims 1 to 5, wherein, Both ends of the magnetic core are provided with a magnetic yoke, and a plane where each of the magnetic yokes is located is perpendicular to an axis of the magnetic core, and each of the magnetic yokes is provided with a ventilation hole, and the ventilation hole is in a regular shape.

8. The transformer of claim 7, wherein, The center point of the ventilation hole coincides with the axis of the magnetic core column in the magnetic core.

9. A charging device, characterized by The charging device comprises a charging module, a charging interface and a power distribution unit, the charging module comprises the transformer according to any one of claims 1 to 8; The charging module is used to supply power to the power distribution unit; The power distribution unit is used to adjust the charging power when the charging module supplies power, and supply power to the charging interface according to the adjusted charging power; The charging interface is used to charge the device according to the adjusted charging power.

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