DC main transformer, DC-DC converter and new energy vehicle

Abstract

The utility model provides a DC main transformer, a DC-DC converter and a new energy vehicle, and relates to the technical field of new energy vehicles, the DC main transformer provided by the utility model comprises a primary side line cake, a secondary side copper sheet and a magnetic core; the primary side line cake and the secondary side copper sheet are oppositely arranged, and the primary side line cake and the secondary side copper sheet are wrapped by the magnetic core; the magnetic core is provided with the window corresponding to the secondary side copper sheet, and the pouring sealant is poured outside the magnetic core and inside the window, so that the heat dissipation area is enlarged, the heat conduction efficiency is improved, and the heat dissipation performance of the DC main transformer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, in particular to a DC main transformer, a DC-DC converter and a new energy vehicle. Background Art

[0002] To achieve high power density, DC converters typically require a smaller magnetic core. This, combined with the staggered primary and secondary windings, results in an overly compact structure, making it difficult to dissipate internal heat. While increasing the size of the secondary copper sheet to extend it outward to conduct heat, this increases the heat dissipation area, but the heat transfer efficiency is low, and the improvement in heat dissipation efficiency remains limited. Utility Model Content

[0003] The purpose of the utility model is to provide a DC main transformer, a DC-DC converter and a new energy vehicle, so as to alleviate the technical problem of poor heat dissipation performance of the DC main transformer in the prior art.

[0004] In a first aspect, the present invention provides a DC main transformer comprising: a primary side wire disc, a secondary side copper sheet and a magnetic core;

[0005] The primary side wire cake and the secondary side copper sheet are arranged opposite to each other, and both the primary side wire cake and the secondary side copper sheet are wrapped by the magnetic core;

[0006] The magnetic core is provided with a window relative to the secondary copper sheet, and the outside of the magnetic core and the inside of the window are filled with potting glue.

[0007] In combination with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the secondary copper sheet has a bending portion extending into the window.

[0008] In combination with the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the magnetic core includes: a first magnetic core and a second magnetic core;

[0009] The first magnetic core is connected to the second magnetic core, and the primary side wire disc and the secondary side copper sheet are wrapped between the first magnetic core and the second magnetic core.

[0010] In combination with the second possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the first magnetic core and / or the second magnetic core is provided with a first opening.

[0011] In combination with the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the magnetic core is installed between the first cooling water channel and the second cooling water channel;

[0012] The magnetic core is provided with the windows respectively relative to the first cooling water channel and the second cooling water channel.

[0013] In a second aspect, the present invention provides a DC-DC converter comprising: an inductor and the DC main transformer described in the first aspect, wherein the inductor is arranged opposite to the DC main transformer.

[0014] In combination with the second aspect, the present invention provides a first possible implementation of the second aspect, wherein the inductor includes: a third magnetic core, a fourth magnetic core, and a spiral copper sheet;

[0015] The third magnetic core is connected to the fourth magnetic core, and the spiral copper sheet is wrapped between the third magnetic core and the fourth magnetic core.

[0016] In combination with the first possible implementation of the second aspect, the present invention provides a second possible implementation of the second aspect, wherein the third magnetic core and / or the fourth magnetic core is provided with a second opening portion.

[0017] In combination with the first possible implementation of the second aspect, the present invention provides a third possible implementation of the second aspect, wherein the primary edge wire disc, the secondary edge copper sheet and the spiral copper sheet are respectively connected to the base.

[0018] In a third aspect, the new energy vehicle provided by the present invention is equipped with the DC main transformer described in the first aspect, or the new energy vehicle is equipped with the DC-DC converter described in the second aspect.

[0019] The embodiments of the present utility model bring the following beneficial effects: the primary side wire cake and the secondary side copper sheet are arranged relative to each other, and the primary side wire cake and the secondary side copper sheet are respectively wrapped by the magnetic core, the magnetic core is provided with a window relative to the secondary side copper sheet, and the outside of the magnetic core and the inside of the window are poured with potting glue, which expands the heat dissipation area and improves the thermal conductivity efficiency, thereby facilitating the improvement of the heat dissipation performance of the DC converter.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific implementation methods or related technical descriptions. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1A schematic diagram of a DC converter provided in an embodiment of the present utility model;

[0023] Figure 2 A schematic diagram of the secondary copper sheet of a DC converter provided in an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of a DC converter, a first cooling water channel, and a second cooling water channel provided in an embodiment of the present invention.

[0025] Icons: 100-primary edge wire cake; 200-secondary edge copper sheet; 201-bending part; 300-magnetic core; 301-window; 302-first opening; 310-first magnetic core; 320-second magnetic core; 400-inductor; 401-second opening; 410-third magnetic core; 420-fourth magnetic core; 430-spiral copper sheet; 500-base; 600-first cooling water channel; 700-second cooling water channel. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, unless separately marked, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] like Figure 1 As shown, the DC main transformer provided by the present invention includes: a primary wire cake 100, a secondary copper sheet 200, and a magnetic core 300. The primary wire cake 100 and the secondary copper sheet 200 are arranged opposite each other, and both the primary wire cake 100 and the secondary copper sheet 200 are wrapped by the magnetic core 300. The magnetic core 300 has a window 301 opposite to the secondary copper sheet 200, and potting compound is poured outside the magnetic core 300 and inside the window 301. The potting compound can fully absorb and transfer heat through the window 301, accelerating heat transfer to the outside and thereby improving heat dissipation efficiency.

[0030] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the secondary copper sheet 200 has a bending portion 201 extending into the window 301. By providing the bending portion 201, the area of ​​the secondary copper sheet 200 extending into the window 301 can be increased, thereby improving the heat transfer efficiency of the secondary copper sheet 200 to the potting compound, which is beneficial to improving the heat dissipation performance.

[0031] like Figure 1 As shown, the magnetic core 300 includes: a first magnetic core 310 and a second magnetic core 320 ; the first magnetic core 310 is connected to the second magnetic core 320 , and the primary side wire cake 100 and the secondary side copper sheet 200 are wrapped between the first magnetic core 310 and the second magnetic core 320 .

[0032] The first opening 302 may be provided on the first magnetic core 310 or the second magnetic core 320 , or the first opening 302 may be provided on each of the first magnetic core 310 and the second magnetic core 320 , so that heat can be dissipated to the outside through the first opening 302 .

[0033] like Figure 1 and Figure 3 As shown, the magnetic core 300 is installed between the first cooling water channel 600 and the second cooling water channel 700; the magnetic core 300 is provided with windows 301 relative to the first cooling water channel 600 and the second cooling water channel 700, respectively. The heat inside the DC converter is transferred to the first cooling water channel 600 and the second cooling water channel 700 through the potting glue in the windows 301, which can significantly improve the heat dissipation efficiency.

[0034] In an optional embodiment, the DC-DC converter includes: an inductor 400 and the DC main transformer described in the above embodiment, and the inductor 400 is arranged opposite to the DC main transformer.

[0035] Furthermore, the inductor 400 includes: a third magnetic core 410, a fourth magnetic core 420 and a spiral copper sheet 430; the third magnetic core 410 is connected to the fourth magnetic core 420, and the spiral copper sheet 430 is wrapped between the third magnetic core 410 and the fourth magnetic core 420; the primary side wire cake 100, the secondary side copper sheet 200 and the spiral copper sheet 430 are coaxially arranged.

[0036] The second opening 401 may be provided on the third magnetic core 410 or the fourth magnetic core 420 , or the second opening 401 may be provided on each of the third magnetic core 410 and the fourth magnetic core 420 , so that heat is dissipated to the outside through the second opening 401 .

[0037] It should be noted that the primary wire disc 100 , the secondary copper sheet 200 and the spiral copper sheet 430 are all mounted on the base 500 ; the first opening 302 and the second opening 401 are both provided on the end surface of the magnetic core 300 away from the base 500 .

[0038] The new energy vehicle provided by the embodiment of the present invention is equipped with the DC main transformer or DC-DC converter described in the above embodiment. The new energy vehicle has the technical effects of the above DC main transformer, which will not be repeated here.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A DC main transformer, characterized in that: include: A primary side wire cake (100), a secondary side copper sheet (200) and a magnetic core (300); The primary edge wire cake (100) and the secondary edge copper sheet (200) are arranged opposite to each other, and both the primary edge wire cake (100) and the secondary edge copper sheet (200) are wrapped by the magnetic core (300); The magnetic core (300) is provided with a window (301) relative to the secondary copper sheet (200), and the outside of the magnetic core (300) and the inside of the window (301) are filled with potting glue.

2. The DC main transformer according to claim 1, characterized in that: The secondary copper sheet (200) has a bent portion (201) extending into the window (301).

3. The DC main transformer according to claim 1, characterized in that: The magnetic core (300) comprises: a first magnetic core (310) and a second magnetic core (320); The first magnetic core (310) is connected to the second magnetic core (320), and the primary side wire cake (100) and the secondary side copper sheet (200) are wrapped between the first magnetic core (310) and the second magnetic core (320).

4. The DC main transformer according to claim 3, characterized in that: The first magnetic core (310) and / or the second magnetic core (320) is provided with a first opening portion (302).

5. The DC main transformer according to claim 1, characterized in that: The magnetic core (300) is installed between the first cooling water channel (600) and the second cooling water channel (700); The magnetic core (300) is provided with the windows (301) respectively relative to the first cooling water channel (600) and the second cooling water channel (700).

6. A DC-DC converter, characterized in that: include: An inductor (400) and a DC main transformer according to any one of claims 1 to 5, wherein the inductor (400) and the DC main transformer are arranged opposite to each other.

7. The DC-DC converter according to claim 6, characterized in that: The inductor (400) comprises: a third magnetic core (410), a fourth magnetic core (420) and a spiral copper sheet (430); The third magnetic core (410) is connected to the fourth magnetic core (420), and the spiral copper sheet (430) is wrapped between the third magnetic core (410) and the fourth magnetic core (420).

8. The DC-DC converter according to claim 7, characterized in that: The third magnetic core (410) and / or the fourth magnetic core (420) is provided with a second opening portion (401).

9. The DC-DC converter according to claim 7, characterized in that: The primary edge wire disc (100), the secondary edge copper sheet (200) and the spiral copper sheet (430) are respectively connected to a base (500).

10. A new energy vehicle, characterized in that: The new energy vehicle is equipped with the DC main transformer according to any one of claims 1 to 5; or, the new energy vehicle is equipped with the DC-DC converter according to any one of claims 6 to 9.

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