Transformer and charging equipment

Abstract

The utility model provides a transformer and charging equipment, and relates to the technical field of new energy, and the transformer comprises a magnetic core, a winding and a fixing frame; the fixing frame is arranged on the outer side of a magnetic core middle column of the magnetic core in a surrounding mode, and the winding is wound on the fixing frame. The fixing frame is provided with a plurality of through holes, and the projection of each through hole on the winding is located in the range of the area where the winding is located. According to the technical scheme provided by the invention, on the basis of the transformer obtained based on the small-size magnetic core design, the winding is arranged in the magnetic core, so that the occupied space of the winding in the magnetic core can be increased, the number of winding strands of the winding is increased, and then the current density of the winding and the temperature of the winding can be reduced.

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 charging modules, charging interfaces and the like.

[0003] In the related art, the size of the LLC transformer, which is a core component of the charging module, has an impact on 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 has a great impact on 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 has a great impact on 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 winding and a fixing frame.

[0008] The fixing frame is arranged around the outside of the magnetic core column of the magnetic core, and the winding is wound on the fixing frame.

[0009] The fixing frame is provided with a plurality of through holes, and each through hole in the projection of the winding is located within the range of the area where the winding is located.

[0010] Optionally, the magnetic core column comprises a plurality of column segments, and the plurality of column segments are connected by a heat-conducting sheet, and the center points of the cross sections of each column segment coincide.

[0011] Optionally, the projection of the heat-conducting sheet on the fixing frame does not intersect or coincide with the area where the plurality of through holes of the fixing frame are located.

[0012] 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.

[0013] Optionally, the magnetic core is provided with a magnetic yoke at each end, and the plane where each magnetic yoke is located is perpendicular to the axis of the magnetic core.

[0014] Each of the magnetic yokes is provided with at least one heat dissipation groove located at the edge of the magnetic yoke.

[0015] Optionally, the area where the magnetic yoke contacts the middle column of the magnetic core is provided with a groove connected with the edge of the heat dissipation groove.

[0016] Optionally, the groove is regular.

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

[0018] Each of the magnetic yokes is provided with at least one ventilation hole, and the ventilation hole is regular.

[0019] Optionally, at least one side column of the magnetic core is provided with a ventilation groove for dissipating heat of the winding.

[0020] In a second aspect, an embodiment of the present application provides a charging device, the charging device comprising: a charging module, a charging interface and a power distribution unit, the charging module comprising the transformer of any one of the first aspect;

[0021] The charging module is configured to supply power to the power distribution unit.

[0022] The power distribution unit is configured to adjust the charging power when the charging module supplies power, and supply power to the charging interface according to the adjusted charging power.

[0023] The charging interface is configured to charge the device according to the adjusted charging power.

[0024] An embodiment of the present application provides a transformer, which comprises a magnetic core, a winding and a fixing frame. The fixing frame is arranged outside the middle column of the magnetic core. The fixing frame is provided with a plurality of through holes. Each of the through holes is in the projection of the winding and is located within the range of the winding. Based on the transformer designed based on a small-size magnetic core, by arranging a winding in the magnetic core, the space that can be occupied by the winding in the magnetic core can be increased, so that the number of winding strands can be increased, and thus the current density of the winding and the temperature of the winding and the transformer can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A device schematic diagram corresponding to the charging device where the charging module of the transformer provided by an embodiment of the present application is located;

[0026] Figure 2 A structure schematic diagram of the transformer provided by an embodiment of the present application;

[0027] Figure 3A schematic structural diagram of a magnetic core provided in an embodiment of the present application;

[0028] Figure 4 A schematic structural diagram of another magnetic core provided in an embodiment of the present application;

[0029] Figure 5 A schematic structural diagram of another magnetic core provided in an embodiment of the present application;

[0030] Figure 6 A schematic structural diagram of another magnetic core provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] In the following description, specific details such as specific system structures and technologies are provided for illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known technologies, algorithms, and electronic devices are omitted to avoid obstructing the description of the present application with unnecessary details.

[0032] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a," "said," "above," and "the" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise.

[0033] With the continuous development of electric vehicles (hereinafter referred to as electric vehicles), charging piles for charging electric vehicles have gradually been promoted. The charging piles may include: a charging module and a charging interface, etc.

[0034] In related technologies, the size of the LLC transformer, a core component of a charging module, affects the size of the charging module. The LLC transformer is typically composed of a resonant inductor winding and a main transformer.

[0035] However, due to the small size of the charging module, the LLC transformer is also designed with a small-sized magnetic core, which has a great impact on the heat dissipation of the LLC transformer.

[0036] Therefore, an embodiment of the present application proposes a transformer comprising: a magnetic core, a winding, and a fixing frame, wherein the fixing frame is disposed around the outside of the core center column of the magnetic core, and the fixing frame is provided with a plurality of through holes, and the projection of each through hole on the winding is located within the range of the area where the winding is located. Based on a transformer designed based on a small-sized magnetic core, by providing a winding within the magnetic core, the space that the winding can occupy within the magnetic core can be increased, thereby increasing the number of winding strands of the winding, and further reducing the current density of the winding, and reducing the temperature of the winding and the transformer.

[0037] See also Figure 1 , Figure 1 This is a schematic diagram of a device corresponding to a charging device in which a charging module involved in a transformer proposed in an embodiment of the present application is located. The charging device may include: a charging module 10, a charging interface 20 and a power distribution unit 30.

[0038] The charging module 10 may include: a transformer 11 .

[0039] Furthermore, the power distribution unit 30 is connected to the charging module 10 and the charging interface 20 .

[0040] Correspondingly, the charging module 10 can output the adjusted voltage through the transformer 11, thereby supplying energy to the power distribution unit 30. The power distribution unit 30 can adjust the charging power when the charging module 10 supplies energy, and supply energy to the charging interface 20 according to the adjusted charging power. The charging interface 20 can charge the device according to the adjusted charging power, that is, the charging device 10 can charge the electric vehicle through the charging interface 20.

[0041] It should be noted that in actual applications, the charging device can be a charging pile or other device capable of charging, and the present embodiment does not specifically limit the type of charging device. In addition, the present embodiment uses electric vehicles as an example for explanation, but in actual applications, the charging device can also charge electric bicycles, electric motorcycles, or other electric travel devices, and the present embodiment does not specifically limit this.

[0042] The following is a detailed introduction to the transformer in the charging module.

[0043] Figure 2 This is a schematic diagram of the structure of a transformer provided in an embodiment of the present application, which is used as an example but not as a limitation, and is applied to the above-mentioned charging module. Figure 2 The transformer may include: a magnetic core 210 , a winding 220 and a fixing frame 230 .

[0044] The fixed frame 230 is arranged around the outside of the middle column of the magnetic core 210 and is located in the space between the middle column and the side column of the magnetic core. Correspondingly, the winding 220 can be wound on the fixed frame 230, so that the winding 220 is wound on the outside of the middle column of the magnetic core and does not contact the middle column of the magnetic core.

[0045] Moreover, the fixed frame 230 can be provided with a plurality of through holes 2301, and each through hole 2301 is located in the projection of the winding 220 and is located in the range of the area where the winding 220 is located, so that the area of the winding 220 corresponding to each through hole 2301 can realize air circulation, so that the winding 220 can be cooled based on the flowing air, so as to improve the heat dissipation effect of the transformer.

[0046] It should be noted that in actual application, the structure of the magnetic core 210 can be further adjusted to improve the heat dissipation effect of the transformer. Referring to Figure 3 , Figure 3 A structure diagram of a magnetic core provided by an embodiment of the present application is shown. The side column of the magnetic core 210 can be provided with a ventilation groove 211 for cooling the winding 220. On the basis of cooling the winding 220 through the plurality of through holes 2301 of the fixed frame 230, further cooling the winding 220 through the ventilation groove 211 can further improve the heat dissipation effect of the winding 220.

[0047] In an optional embodiment, referring to Figure 4 , Figure 4 Another structure diagram of a magnetic core provided by an embodiment of the present application is shown. The middle column of the magnetic core 210 includes a plurality of middle column segments 212 connected by a heat conduction sheet 213.

[0048] For example, the middle column of the magnetic core can be formed by three middle column segments 212 connected by two heat conduction sheets 213.

[0049] The heat conduction sheet 213 can be composed of at least one of ceramic substrate, heat conduction silicon sheet and vacuum cavity heat plate. Correspondingly, each middle column segment 212 can transfer heat to other middle column segments 212 through the heat conduction sheet 213, so that the middle column of the magnetic core can maintain thermal balance.

[0050] Moreover, the cross section of the middle column of the magnetic core can be circular, square, rectangular or other regular shape, and the cross section of each middle column segment 212 is consistent with the cross section of the middle column of the magnetic core, and the center points of the cross sections of each middle column segment 212 coincide.

[0051] In addition, referring to Figure 5 , Figure 5As shown in the structural diagram of the magnetic core provided in the embodiment of the present application, the projection of the heat conduction sheet 213 does not intersect or coincide with the area where the plurality of through holes 2301 of the fixing frame 230 are located, that is, the area of the fixing frame 230 where no through hole 2301 is arranged covers the area where the heat conduction sheet 213 is located in the magnetic core middle column, so that the eddy current generated due to the magnetic leakage in the area where the heat conduction sheet 213 is located can be reduced, and the influence of the temperature increase of the winding 220 and the influence of the heat generation of the winding 220 can be reduced.

[0052] In an optional embodiment, referring to Figure 6 , Figure 6 As shown in the structural diagram of the magnetic core provided in the embodiment of the present application, the two ends of the magnetic core 210 can be provided with magnetic yokes 214, the plane where each magnetic yoke 214 is located is perpendicular to the axis of the magnetic core 210, and each magnetic yoke 214 can be provided with at least one heat dissipation groove 2141, and the heat dissipation groove 2141 is located at the edge of the magnetic yoke 214.

[0053] The ratio between the area of the heat dissipation groove 2141 and the area of the magnetic yoke 214 can be determined according to the actual required magnetic flux density, and the embodiment of the present application does not make specific limitation on the ratio.

[0054] As shown in Figure 6 , the edge of the heat dissipation groove 2141 close to the center of the magnetic yoke 214 is parallel to the edge of the magnetic yoke 214, thereby forming a planar vent, which can effectively reduce the wind resistance of the transformer, and further improve the ventilation effect of the transformer to improve the heat dissipation effect of the transformer.

[0055] Further, referring to Figure 6 , the area where the magnetic yoke 214 contacts the magnetic core middle column can be provided with a groove 2142, and the groove 2142 can be connected with the edge of the heat dissipation groove 2141, thereby forming a larger heat dissipation area, so that the winding 220 can be cooled by the heat dissipation groove 2141, and the magnetic core middle column of the magnetic core 210 can also be cooled by the groove 2142, thereby improving the heat dissipation effect of the transformer.

[0056] In addition, in order to further improve the heat dissipation effect, the shape of the magnetic core middle column can be adjusted, that is, a groove is arranged on the magnetic core middle column, and the groove of the magnetic core middle column is consistent with the groove 2142 of the magnetic yoke 214, so that the interior of the magnetic core middle column can be cooled through the arranged groove, thereby further improving the heat dissipation effect.

[0057] It should be noted that, in actual application, the recess 2142 of the magnetic yoke 214 can adopt different regular shapes according to the area and shape of the heat dissipation groove 2141. For example, the recess 2142 of the magnetic yoke 214 can be circular, square, rectangular or other regular shapes, which are not limited in the embodiments of the present application.

[0058] In addition, referring to Figure 6 Both ends of the magnetic core 210 are provided with the magnetic yoke 214, and each magnetic yoke 214 is provided with at least one ventilation hole 2143, which further improves the heat dissipation effect of the magnetic core 210.

[0059] The ventilation hole 2143 is in a regular shape, for example, the ventilation hole 2143 can be circular, rectangular or other regular shapes, and the shape of the ventilation hole 2143 is not limited in the embodiments of the present application.

[0060] In addition, each ventilation hole 2143 can be located in different regions of the magnetic yoke 214, and the area and position of the ventilation hole 2143 can be adjusted according to actual needs. For example, each ventilation hole 2143 can be located in the corner region of the magnetic yoke 214.

[0061] In summary, the transformer provided in the embodiments of the present application comprises a magnetic core, a winding and a fixing frame. The fixing frame is arranged around the outside of the magnetic core column of the magnetic core, and the fixing frame is provided with a plurality of through holes. The projection of each through hole on the winding is located within the range of the region where the winding is located. On the basis of the transformer designed based on a small-size magnetic core, by arranging a winding in the magnetic core, the space that can be occupied by the winding in the magnetic core can be increased, thereby increasing the number of winding strands of the winding, and further reducing the current density of the winding and the temperature of the winding.

[0062] In addition, by controlling the region of the fixing frame where no through hole is arranged, the region where the heat conduction sheet in the magnetic core column is located is covered, which can reduce the eddy current generated due to the magnetic leakage of the region where the heat conduction sheet is located, thereby reducing the influence of the temperature increase of the winding, and further reducing the influence of the heating of the winding on the heat dissipation of the transformer.

[0063] In addition, by arranging the ventilation groove on the magnetic core side column, the winding can be further cooled by the ventilation groove on the basis of being cooled by the plurality of through holes of the fixing frame, which can further improve the heat dissipation effect of the winding.

[0064] In addition, by arranging the ventilation groove on the magnetic core side column, the winding can be further cooled by the ventilation groove on the basis of being cooled by the plurality of through holes of the fixing frame, which can further improve the heat dissipation effect of the winding.

[0065] Further, by arranging at least one heat dissipation groove on each magnetic yoke, a planar vent can be formed, so that 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.

[0066] It should be noted that the area where the magnetic yoke is in contact with the magnetic core middle column is provided with a groove, and the magnetic core middle column can also be cooled through the groove, so as to improve the heat dissipation effect of the transformer.

[0067] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0068] Those skilled in the art can appreciate that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solutions. Professionals 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.

[0069] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, and the division of the modules or units is only a logical function division, and actual implementation can have another division manner, 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 shown or discussed mutual elements can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0070] 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 the presence or addition of one or more other features, integers, steps, operations, elements, components and / or sets thereof.

[0071] It should also be understood that the term "and / or" used in the specification and the appended claims of the present application means any combination of the associated listed items and all possible combinations, and includes these combinations.

[0072] As used in the specification and in the appended claims, the term "if' can be interpreted as meaning "when" or "upon" or "in response to determining" 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 to mean "upon determining" or "in response to determining" or "upon detecting [the described condition or event]" or "in response to detecting [the described condition or event]" depending on the context.

[0073] In addition, the description in the specification and the appended claims of this application, the terms "first", "second", "third", etc. are merely used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0074] In the specification of this application, the reference "one embodiment" or "some embodiments" and the like means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in further some embodiments" and the like appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "include", "contain", "have" and their variants mean "include but not limited to", unless otherwise specifically emphasized.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A transformer, characterized by The transformer comprises a magnetic core, a winding and a fixing frame; The fixing frame is arranged around the outside of the magnetic core column of the magnetic core, and the winding is wound on the fixing frame; The fixing frame is provided with a plurality of through holes, each of which is in the projection of the winding and is located within the range of the area where the winding is located.

2. The transformer of claim 1, wherein, The magnetic core column comprises a plurality of column segments connected by heat-conducting sheets, and the center points of the cross sections of each column segment coincide.

3. The transformer of claim 2, wherein, The projection of the heat-conducting sheet on the fixing frame does not intersect or coincide with the area where the plurality of through holes of the fixing frame are located.

4. The transformer of claim 2, wherein, The heat-conducting sheet is composed of at least one of ceramic sheet, heat-conducting silicon sheet and vacuum cavity.

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

6. The transformer of claim 5, wherein, The area where the magnetic yoke and the magnetic core column are in contact is provided with a groove connected with the edge of the heat dissipation groove.

7. The transformer according to claim 6, characterized in that The groove is regular.

8. The transformer of any one of claims 1 to 7, wherein, Both ends of the magnetic core are provided with magnetic yokes, and the plane where each magnetic yoke is located is perpendicular to the axis of the magnetic core. Each magnetic yoke is provided with at least one ventilation hole, and the ventilation hole is regular.

9. The transformer of any one of claims 1 to 7, wherein, At least one magnetic core side column of the magnetic core is provided with a ventilation groove for heat dissipation of the winding.

10. 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 of any one of claims 1 to 9; 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 is powered, 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.

Images