Coil sinking type vehicle-mounted charger

Abstract

The utility model relates to a charger, and discloses a coil sinking type vehicle-mounted charger, which comprises an upper shell and a lower shell covered with the upper shell, a lower circuit board is mounted in an inner cavity of the lower shell, a coil is connected onto the lower circuit board, an upper circuit board is mounted in an inner cavity of the upper shell, and a capacitor is mounted on the upper circuit board. The outer end face of the lower shell is provided with a plurality of first cooling fins, the bottom of an inner cavity of the lower shell is provided with a sunken installation groove, the coil is installed in the installation groove and arranged opposite to the capacitor, a gap is formed between the coil and the capacitor, the installation groove is sunken, a protruding block is formed on the outer end face of the lower shell, and the protruding block is connected with the first cooling fins. The groove type mounting groove is formed in the position, where the coil is mounted, of the lower shell, the protruding block corresponding to the mounting groove extends to the first cooling fin, but the height of the protruding block is lower than that of the first cooling fin, and therefore the lower shell can be made to be thinner, materials are reduced, and meanwhile the overall size of the charger is reduced.

Description

Technical Field

[0001] The utility model relates to a vehicle-mounted charger, in particular to a coil-sinking type vehicle-mounted charger. Background Art

[0002] At present, the on-board chargers of low-speed electric vehicles or special electric vehicles basically adopt an air-cooled heat dissipation solution. Since the most important factor of air cooling is the heat dissipation area, these on-board chargers are generally large in size and heavy in weight, such as the charger with announcement number CN103475071B.

[0003] The charger is generally composed of an upper shell and a lower shell. An upper circuit board is installed in the upper shell. Multiple capacitors are installed on the upper circuit board. The upper circuit board is used to convert strong electricity into weak electricity. A lower circuit board is installed in the lower shell as a signal transmission module. An inductor is installed on the lower circuit board. When the upper shell is installed on the lower shell, the capacitors of the upper circuit board cannot interfere with the inductors of the lower circuit board. In order to avoid interference, the upper shell and the lower shell are made relatively high, which lengthens the height of the entire charger, making the existing chargers relatively large. Utility Model Content

[0004] The utility model aims at the shortcomings of the prior art and provides a coil-sinking type vehicle-mounted charger.

[0005] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0006] A coil-sinking on-board charger comprises an upper shell and a lower shell covering the upper shell, a lower circuit board is installed in the inner cavity of the lower shell, a coil is connected to the lower circuit board, an upper circuit board is installed in the inner cavity of the upper shell, a capacitor is installed on the upper circuit board, a plurality of first heat sinks are provided on the outer end surface of the lower shell, a recessed mounting groove is provided at the bottom of the inner cavity of the lower shell, the coil is installed in the mounting groove and arranged opposite to the capacitor, a gap is provided between the coil and the capacitor, the mounting groove is recessed and forms a convex block on the outer end surface of the lower shell, and the convex block is connected to a plurality of first heat sinks.

[0007] Preferably, the height of the protrusion of the bump is less than or equal to the height of the first heat sink.

[0008] Preferably, a positioning column is integrally formed at the bottom of the installation groove, and the coil is sleeved on the positioning column and positioned in the installation groove.

[0009] Preferably, a plurality of second heat sinks are provided on the side wall of the lower shell, each second heat sink is connected to a corresponding first heat sink, and all the second heat sinks are integrally cast on the lower shell.

[0010] Preferably, the number of the second heat sinks is less than the number of the first heat sinks.

[0011] Preferably, a plurality of supports are integrally formed around the outer bottom of the lower shell, and mounting openings for mounting screws are provided on the supports.

[0012] Preferably, a plurality of support columns are provided at the bottom of the inner cavity of the lower shell, and threaded holes are provided on the support columns. The lower circuit board is placed on the support columns and fastened to the threaded holes by screws.

[0013] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0014] (1) A groove-type mounting groove is formed at the position where the coil is mounted in the lower housing, and the protrusion corresponding to the mounting groove extends to the first heat sink, but its height is lower than the first heat sink, so that the lower housing can be made thinner, saving materials and reducing the overall volume of the charger.

[0015] (2) The first heat sink has more contact surface with the bump, thus providing a heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the outer end surface of the lower shell.

[0018] Figure 3 This is a structural view without the upper shell installed.

[0019] Figure 4 It is a schematic diagram of the structure inside the lower shell.

[0020] The parts indicated by the numbers in the above drawings are as follows:

[0021] 1—Upper shell

[0022] 2—lower housing, 21—first heat sink, 22—mounting groove, 23—bump, 24—positioning column, 25—second heat sink, 26—support, 27—support column, 261—mounting port, 271—threaded hole

[0023] 3—lower circuit board, 31—coil

[0024] 4—upper circuit board, 41—capacitor DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-4 The utility model is further described in detail with examples.

[0026] Example 1

[0027] The coil-sinking vehicle charger includes an upper shell 1 and a lower shell 2 covering the upper shell 1, which are fastened together by screws. The upper shell 1 and the lower shell 2 are both cast from aluminum alloy. The inner cavity of the lower shell 2 is equipped with a lower circuit board 3, which is a weak current board and also an information processing module. A coil 31 is connected to the lower circuit board 3, and the coil 31 is an inductor coil. The inner cavity of the upper shell 1 is equipped with an upper circuit board 4, which is used to convert strong electricity into weak electricity, and a capacitor 41 is installed on the upper circuit board 4. The outer end surface of the lower shell 2 is provided with a number of first heat sinks 21, which are used to transfer the heat in the vehicle charger to the environment to dissipate heat. A recessed mounting groove 22 is provided at the bottom of the inner cavity of the lower housing 2, and the coil 31 is installed in the mounting groove 22 and arranged opposite to the capacitor 41. A gap is provided between the coil 31 and the capacitor 41, and there is no interference between the coil 31 and the capacitor 41. Since the mounting groove 22 is recessed, a convex block 23 is formed on the outer end surface of the lower housing 2, and the convex block 23 is connected to the plurality of first heat sinks 21. Since the coil 31 is installed in the mounting groove 22, the height of the lower housing 2 can be reduced, thereby reducing the overall volume of the on-board charger.

[0028] The height of the protruding block 23 is less than or equal to the height of the first heat sink 21 , so that the protruding block 23 is avoided and the lower housing 2 can be placed flat on a horizontal surface.

[0029] A positioning column 24 is integrally formed at the bottom of the installation groove 22 , and the coil 31 is sleeved on the positioning column 24 and positioned in the installation groove 22 . The coil 31 has good stability on the lower housing 2 and will not easily shake horizontally.

[0030] A plurality of supports 26 are integrally formed around the outer bottom of the lower shell 2. The number of supports 26 is four. The supports 26 are provided with mounting holes 261 for mounting screws. The mounting holes 261 are notched. The on-board charger is connected to other equipment through the supports 26, and has good stability.

[0031] A plurality of support columns 27 are provided at the bottom of the inner cavity of the lower shell 2. The support columns 27 are provided with threaded holes 271. The lower circuit board 3 is placed on the support columns 27 and fastened to the threaded holes 271 by screws. The lower circuit board 3 has good stability in the lower shell 2.

[0032] Example 2

[0033] The features of Example 2 are basically the same as those of Example 1, except that a plurality of second heat sinks 25 are provided on the side wall of the lower shell 2, each second heat sink 25 is connected to the corresponding first heat sink 21, the second heat sink 25 and the first heat sink 21 are integrally cast, and all the second heat sinks 25 are integrally cast on the lower shell 2, and the second heat sink 25 further improves the heat dissipation capacity of the vehicle charger.

[0034] Example 3

[0035] The features of the third embodiment are basically the same as those of the second embodiment, except that the number of the second heat sinks 25 is less than the number of the first heat sinks 21 .

Claims

1. A coil-sinking vehicle charger, comprising an upper housing (1) and a lower housing (2) covering the upper housing (1), wherein a lower circuit board (3) is installed in the inner cavity of the lower housing (2), and a coil (31) is connected to the lower circuit board (3), an upper circuit board (4) is installed in the inner cavity of the upper housing (1), and a capacitor (41) is installed on the upper circuit board (4), and a plurality of first heat sinks (21) are provided on the outer end surface of the lower housing (2), characterized in that: A recessed mounting groove (22) is provided at the bottom of the inner cavity of the lower housing (2); the coil (31) is installed in the mounting groove (22) and arranged opposite to the capacitor (41); a gap is provided between the coil (31) and the capacitor (41); the mounting groove (22) is recessed and forms a convex block (23) on the outer end surface of the lower housing (2); and the convex block (23) is connected to a plurality of first heat sinks (21).

2. The coil-sinking vehicle charger according to claim 1, characterized in that: The protruding height of the protrusion (23) is less than or equal to the height of the first heat sink (21).

3. The coil-sinking vehicle charger according to claim 1, characterized in that: A positioning column (24) is integrally formed at the bottom of the installation groove (22), and the coil (31) is sleeved on the positioning column (24) and positioned in the installation groove (22).

4. The coil-sinking vehicle charger according to claim 1, characterized in that: A plurality of second heat sinks (25) are provided on the side wall of the lower housing (2), each second heat sink (25) is connected to a corresponding first heat sink (21), and all the second heat sinks (25) are integrally cast on the lower housing (2).

5. The coil-sinking vehicle charger according to claim 4 is characterized in that: The number of the second heat sinks (25) is less than the number of the first heat sinks (21).

6. The coil-sinking vehicle-mounted charger according to any one of claims 1 to 5, characterized in that: A plurality of supports (26) are integrally formed around the outer bottom of the lower shell (2), and mounting openings (261) for mounting screws are provided on the supports (26).

7. The coil-sinking vehicle charger according to any one of claims 1 to 5, characterized in that: A plurality of support columns (27) are provided at the bottom of the inner cavity of the lower housing (2), threaded holes (271) are provided on the support columns (27), and the lower circuit board (3) is placed on the support columns (27) and fastened to the threaded holes (271) by means of screws.

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