Charger

Abstract

To provide a charger that can be efficiently cooled.SOLUTION: A charger of the present disclosure has a housing, a plate, a coil, a substrate, and a fan. The housing has a main surface. The main surface extends in the first and second directions. The second direction intersects the first direction. The plate is located in the housing. The plate extends in the first and second directions. The coil is located between the main surface and the plate in the third direction. The third direction intersects the first and second directions. The component groups are located on opposite sides of the coil across the plate in the third direction. The fan is located in a third space. The third space is connected to a first space and a second space in the first direction. The first space is the space between the plate and the coil. The second space is the space between the plate and the component groups.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a charging device. [Background technology]

[0002] In a charging device capable of wireless charging, when an object to be charged is placed near a main surface, power is sent to the object in the form of electromagnetic energy or the like, thereby achieving wireless charging. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-75973 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a charging device, heat is generated during charging, which may limit the efficiency of wireless charging. In order to improve the efficiency of wireless charging, it is desirable to perform efficient cooling.

[0005] The present disclosure provides a charging device that can be cooled efficiently. [Means for solving the problem]

[0006] The charging device according to the present disclosure includes a housing, a plate-shaped portion, a coil, a substrate, and a fan. The housing has a main surface. The main surface extends in a first direction and a second direction. The second direction intersects with the first direction. The plate-shaped portion is disposed within the housing. The plate-shaped portion extends in the first direction and the second direction. The coil is disposed between the main surface and the plate-shaped portion in a third direction. The third direction intersects with the first direction and the second direction. The group of components is disposed on the opposite side of the coil with the plate-shaped portion therebetween in the third direction. The fan is disposed in a third space. The third space communicates with the first space and the second space in the first direction. The first space is a space between the plate-shaped portion and the coil. The second space is a space between the plate-shaped portion and the group of components. Effect of the Invention

[0007] The charging device according to the present disclosure provides efficient cooling. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a configuration of a charging assembly including a charging device according to an embodiment; [Diagram 2] 1 is an exploded perspective view showing a configuration of a charging assembly including a charging device according to an embodiment; [Diagram 3] FIG. 1 is a perspective view showing an external configuration of a charging device according to an embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing a cross-sectional configuration of the charging device according to the embodiment, excluding a rib. [Diagram 5] FIG. 4 is a cross-sectional view showing a cross-sectional configuration including a rib of the charging device according to the embodiment. [Figure 6] FIG. 1 is an exploded perspective view showing a configuration of a charging device according to an embodiment. [Figure 7] FIG. 4 is a perspective view showing a configuration of a plate-shaped portion in the embodiment. [Figure 8] FIG. 2 is a perspective view showing a configuration of a component group and a fan according to the embodiment. [Figure 9] FIG. 4 is a cross-sectional view showing a flow path of gas flowing near a plate-shaped portion in the embodiment. [Figure 10] FIG. 4 is a cross-sectional view showing a flow path of gas flowing near a plate-shaped portion in the embodiment. [Figure 11] 13 is a perspective view showing a flow path of a gas flowing near a plate-shaped portion on the power transmission coil side in the embodiment. FIG. [Figure 12] 13 is a perspective view showing a flow path of gas flowing near a plate-shaped portion on the component group side in the embodiment. FIG. [Figure 13] FIG. 13 is a perspective view showing an external configuration of a charging device according to a modified example of the embodiment. [Figure 14] FIG. 13 is an exploded perspective view showing a configuration of a charging device according to a modified example of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of a charging device according to the present disclosure will be described with reference to the drawings.

[0010] (Embodiment) The charging device of the embodiment can transmit power in the form of electromagnetic energy, etc., to the object to be charged when the object to be charged is placed near the main surface, thereby realizing wireless charging, but is also designed to efficiently cool the object to prevent heat generation during charging.

[0011] A charging assembly 100 including a charging device 1 may be configured as shown in Fig. 1 and Fig. 2. Fig. 1 is a perspective view showing the configuration of the charging assembly 100 including the charging device 1. Fig. 2 is an exploded perspective view showing the configuration of the charging assembly 100 including the charging device 1. In the following, the direction perpendicular to the main surface 2a of the charging device 1 is defined as the Z direction (third direction), the longitudinal direction of the charging device 1 is defined as the X direction (first direction), and the direction perpendicular to the X direction and the Z direction is defined as the Y direction (second direction).

[0012] The object to be charged 200 may be a mobile terminal such as a smartphone. The object to be charged 200 may have a flat box shape. The charging assembly 100 may have a shape corresponding thereto. The charging assembly 100 includes a charging device 1 and a mounting base 101.

[0013] The charging device 1 has a wireless charging function, and a charge target 200 compatible with the wireless charging function can be placed near the main surface 2a of the charging device 1. FIG. 1 illustrates a state in which the charge target 200 is placed near the main surface 2a of the charging device 1 via a placement stand 101. The charging device 1 has a housing 2, multiple power transmission coils 3_1 to 3_3, and a component group 4. In the charging device 1, each power transmission coil 3 is disposed near the main surface 2a in the housing 2. The multiple power transmission coils 3_1 to 3_3 may be disposed at positions shifted from each other in the X direction in the housing 2. The component group 4 is disposed on the -Z side of the power transmission coils 3_1 to 3_3 in the housing 2, and may be configured to be able to control the current supply to each of the multiple power transmission coils 3_1 to 3_3.

[0014] The component group 4 includes a control component 41, a power supply component 42, and a power supply component 43. The control component 41 includes a control circuit such as a microcontroller. The power supply component 42 and the power supply component 43 each include a power supply circuit such as a DC-DC converter. All of the multiple components included in the component group 4 generate heat when powered, but the power supply component 42 and the power supply component 43 each consume more power than the control component 41. Therefore, the power supply component 42 and the power supply component 43 may each be called a heat-generating component in the component group 4.

[0015] The object to be charged 200 has a housing 202 and a receiving coil 203. The housing 202 has a front surface 202a and a back surface 202b. The object to be charged 200 has a display structure (not shown) near the front surface 200a, and the receiving coil 203 is disposed in the housing 202 near the back surface 202b.

[0016] The mounting base 101 has a flat box shape corresponding to the object to be charged 200, and can be combined with the charging device 1 from the +Z side. It has a recess 102 capable of accommodating the object to be charged 200, a plurality of legs 103c to 103f, and a step 104. The recess 102 may have a plurality of bottom surfaces 102a, 102b arranged in a stepped manner in the X direction. The bottom surface 102b has a lower Z height than the bottom surface 102a. Accordingly, the step 104 protrudes to the -Z side. The housing 2 of the charging device 1 has a substantially rectangular shape in the XY plane view, has notches 2c to 2f at positions corresponding to the corners of the substantially rectangular shape, has a side surface 2h on the -X side, and has a side surface 2g on the +X side. The legs 103c-103f may be disposed in the cutouts 2c-2f and the stepped portion 104 may be abutted against the side surface 2h on the -X side, so that the mounting base 101 may be assembled to the charging device 1 from the +Z side. At this time, the housing 2 of the charging device 1 may be screwed to the charging device 1 by inserting screws into the screw holes of the pull-out pieces 2c1-2f1 on the -Z side of the cutouts 2c-2f and the screw holes of the legs 103c-103f.

[0017] The charging device 1 may have a multi-coil wireless charging function. In the charging device 1, the control component 41 can determine the power transmitting coil 3 that is closest to the power receiving coil 203 among the multiple power transmitting coils 3_1 to 3_3, and selectively energize the determined power transmitting coil 3. This can be considered to enable the charging device 1 to perform efficient wireless charging.

[0018] Wireless charging has a tendency to be less efficient and more prone to heat generation than wired charging. For example, the Qi standard established by the Wireless Power Consortium (WPC) is also considering ways to improve the efficiency of wireless charging.

[0019] In the charging device 1, the temperature of the object to be charged 100 may rise during wireless charging, limiting the efficiency of wireless charging. For example, according to the Qi standard, between the charging device (power transmission side) 1 and the object to be charged (power receiving side) 200, one-way communication is performed from the object to be charged 200 to the charging device 1. If the object to be charged 200 has a temperature protection function for electronic components such as the battery 201, when the temperature of the object to be charged 200 rises to a predetermined temperature or higher, the object to be charged 200 may transmit a request to the charging device 1 to reduce the charging power in order to suppress the temperature rise. In order to improve the efficiency of wireless charging, it is desirable to efficiently cool the object to be charged 200.

[0020] As a result of the investigation, it was found that, during wireless charging, heat may be generated in the vicinity of each of the power transmitting coils 3_1 to 3_3 and the component group 4. It is considered that the object to be charged 200 is heated by thermal conduction from a heat source that is close in distance (e.g., the power transmitting coils 3_1 to 3_3, etc.) and also heated by thermal conduction and thermal radiation from a heat source that is far away (e.g., the component group 4, etc.).

[0021] Therefore, in the charging device 1, the space near the transmission coil 3 and the space near the group of components 4 are separated by a plate-shaped portion 5, and a fan 6 is arranged on the side of the plate-shaped portion 5, with the aim of efficiently air-cooling the transmission coil 3 and the group of components 4 in parallel.

[0022] The charging device 1 may be configured as shown in Figs. 3 to 6. Fig. 3 is a perspective view showing the external configuration of the charging device 1. Fig. 3(a) illustrates the external configuration of the charging device 1 from the main surface 2a side, and Fig. 3(b) illustrates the external configuration of the charging device 1 from the bottom surface 2b side. Fig. 4 is a cross-sectional view showing the configuration of a cross section of the charging device 1 not including the rib 52, and illustrates a cross section taken along line AA in Fig. 3(a). Fig. 5 is a cross-sectional view showing the configuration of a cross section of the charging device 1 including the rib 52, and illustrates a cross section taken along line BB in Fig. 3(a).

[0023] The charging device 1 includes a housing 2, a plurality of power transmission coils 3_1 to 3_3, and a group of components 4, as well as a plate-shaped portion 5, a fan 6, a board 7, a board 8, a shield case 9, and a magnetic plate 11.

[0024] The housing 2 has a sheet 20, a side plate portion 21, and a bottom plate portion 22. The sheet 20 extends flat in the XY directions on the +Z side, and forms a main surface 2a of the housing 2. The side plate portions 21 extend in the XZ directions on the +X side and the -X side, and form side surfaces 2g, 2h of the housing 2, respectively. A board 7 may be disposed between the sheet 20 and the power transmission coil 3 in the Z direction. A board 8 may be disposed between the component group 4 and the bottom plate portion 22 in the Z direction. The component group 4 may be mounted on the board 8.

[0025] The charging device 1 may have a side connector type configuration. The side plate portion 21 of the side surface 2g has a hole 18a for the connector 18 near the center in the Y direction. A part of the connector 18 is exposed to the outside of the housing 2 through the hole 18a. The connector 18 may be mounted on a board 8 as shown in FIG. 6. A connector (not shown) on the vehicle side can be fitted into the connector 18. When the connector 18 is a female connector, the connector on the vehicle side is a male connector, and when the connector 18 is a male connector, the connector on the vehicle side is a female connector. FIGS. 3 and 6 illustrate the case where the connector 18 is a female connector.

[0026] The side plate portion 21 of the side surface 2g has a plurality of openings 2g1 in the +Z side area and a plurality of openings 2g2 in the -Z side area. The plurality of openings 2g1 are arranged on both sides of the hole 18a for the connector 18 in the Y direction. The plurality of openings 2g1 on the +Y side of the hole 18a are arranged in the Y direction while being spaced apart from each other. The plurality of openings 2g1 on the -Y side of the hole 18a are arranged in the Y direction while being spaced apart from each other. Similarly, the plurality of openings 2g2 are arranged on both sides of the hole 18a for the connector 18 in the Y direction. The plurality of openings 2g2 on the +Y side of the hole 18a are arranged in the Y direction while being spaced apart from each other. The plurality of openings 2g2 on the -Y side of the hole 18a are arranged in the Y direction while being spaced apart from each other.

[0027] The side plate portions 21 extend in the XZ directions on the +Y side and the -Y side, and form side surfaces 2j, 2i of the housing 2, respectively.

[0028] As shown in Fig. 3(a), the side plate portion 21 of the side surface 2j has openings 2j1 on the +X side and the +Z side. As shown in Fig. 3(b), the side plate portion 21 of the side surface 2i has openings 2i1 on the +X side and the +Z side.

[0029] The bottom plate portion 22 extends in a flat plate shape in the XY directions on the -Z side, and forms the bottom surface 2b of the housing 2.

[0030] 3(b), the bottom plate portion 22 has a plurality of openings 2b1 on the -X side. The plurality of openings 2b1 may be partitioned by a frame for supporting the fan 6.

[0031] The plate-shaped portion 5 is disposed within the housing 2. During charging operation, the heat sources within the housing 2 are mainly the power transmission coil 3 and the component group 4. As shown in Figs. 4, 5 and 7, the plate-shaped portion 5 has a flat plate portion 51. Fig. 7 is a perspective view showing the configuration of the plate-shaped portion 5, as viewed from the +X side, +Y side and +Z side. The plate-shaped portion 5 may be integrated with the side plate portion 21 of the housing 2. The flat plate portion 51 extends in a plate shape in the XY direction. The power transmission coil 3 is disposed on the +Z side of the flat plate portion 51 at a distance, and the component group 4 is disposed on the -Z side at a distance.

[0032] The member formed by integrating the plate-like portion 5 and the side plate portion 21 of the housing 2 can also be called a panel. In this case, the panel forms a partition between the space SP1 and the space SP2 in the housing 2, and can also be considered to form the side surface of the housing 2.

[0033] The plate-shaped portion 5 divides most of the space on the +X side within the housing 2 into spaces SP1 and SP2 shown in Fig. 4. Space SP1 is the space between the plate-shaped portion 5 and the power transmitting coil 3. Space SP2 is the space between the plate-shaped portion 5 and the component group 4. Space SP1 communicates with opening 2g1, opening 2j1, or opening 2i1 on the +X side. Space SP2 communicates with opening 2g2 on the +X side.

[0034] The plate-shaped portion 5 does not partition the remaining space on the -X side inside the housing 2, leaving it as space SP3. The space SP1 communicates with the space SP3 on the -X side. The space SP2 communicates with the space SP3 on the -X side. The space SP3 communicates with the opening 2b1 on the -X side and the -Z side.

[0035] As shown in Figs. 4, 5 and 8, a fan 6 is disposed in the space SP3. Fig. 8 is a perspective view showing the configuration of the component group 4 and the fan 6. Fig. 8 is a view of the component group 4 and the fan 6 as viewed from the +X side, +Y side and +Z side. Fig. 8 shows a state in which the side plate portion 21 is assembled to the bottom plate portion 22 and cut at the Z position of the plate-shaped portion 5. Any fan having an air blowing member and a motor for rotating the same can be used as the fan 6. For simplification, the air blowing member is not shown in Figs. 4, 5 and 8.

[0036] The communicating portion between the space SP3 and the space SP1 forms an inlet for the fan 6 to the space SP1. The communicating portion between the space SP3 and the space SP2 forms an inlet for the fan 6 to the space SP2. The opening 2b1 forms an outlet for the fan 6.

[0037] As shown in Figs. 9 to 12, the plate-shaped portion 5 allows the flow path for cooling the power transmission coil 3 and the flow path for cooling the component group 4 to be spatially independent from each other within the housing 2. Fig. 9 is a cutaway cross-sectional view showing the flow path of the gas flowing near the plate-shaped portion 5. Fig. 10 is a cross-sectional view showing the flow path of the gas flowing near the plate-shaped portion 5, and corresponds to the cross-sectional view of Fig. 4. Fig. 11 is a perspective view showing the flow path of the gas flowing near the plate-shaped portion 5 on the power transmission coil 3 side. Fig. 12 is a perspective view showing the flow path of the gas flowing near the plate-shaped portion 5 on the component group 4 side. In Figs. 9 to 11, the flow path for cooling the power transmission coil 3 is indicated by an arrow with a dashed line. In Figs. 9, 10, and 12, the flow path for cooling the component group 4 is indicated by an arrow with a dotted line.

[0038] As shown in Figures 9 to 12, the gas that has flowed through the flow path for cooling the transmission coil 3 and the gas that has flowed through the flow path for cooling the component group 4 join together in space SP3, are blown by fan 6, and are exhausted to the outside through opening 2b1.

[0039] The ratio of the YZ area of ​​the communication portion between the spaces SP3 and SP1 to the YZ area of ​​the communication portion between the spaces SP3 and SP2 corresponds to the flow rate ratio between the flow path for air-cooling the power transmitting coil 3 and the flow path for air-cooling the component group 4. When designing this structure, the ratio of the YZ area of ​​the communication portion between the spaces SP3 and SP1 to the YZ area of ​​the communication portion between the spaces SP3 and SP2 can be adjusted by adjusting the ratio.

[0040] The flat plate portion 51 may be formed of a material (e.g., resin) having a lower thermal conductivity than metal. This can suppress heat transfer from one side of the space SP1 to the other side of the space SP2, and can thermally separate a flow path for cooling the power transmission coil 3 from a flow path for cooling the component group 4. In addition, since the plate portion 5 is interposed between the main surface 2a of the housing 2 and the component group 4, heat transfer from the component group 4 to the object to be charged 200 arranged near the main surface 2a can be suppressed during charging.

[0041] When the flat plate portion 51 is made of resin, the side plate portion 21 may also be made of resin. This allows the housing 2 to be lighter than when the entire housing 2 is made of metal. In this case, as shown in Figs. 6 and 7, the flat plate portion 51 and the side plate portion 21 may be integrated. This allows the flat plate portion 51 and the side plate portion 21 to use the same mold, thereby reducing the manufacturing cost of the flat plate portion 51 and the side plate portion 21. As shown in Figs. 6 and 8, the component group 4 may be mounted on the board 8 with the +Z side surface and the XY side surface covered with the shield case 9. The shield case 9 may be made of metal. The bottom plate portion 22 may be made of metal. The bottom plate portion 22 may be formed by sheet metal processing. As shown in Figs. 3(a), 3(b), and 6, grounding fittings 15L and 15R extending generally in the Z direction may electrically connect the ground electrode of the board 7, the ground electrode of the board 8, and the bottom plate portion 22.

[0042] 5, 6, and 7, the plate-shaped portion 5 further has a plurality of ribs 52. As shown in Fig. 11, the plurality of ribs 52 divide the space SP1 into a plurality of flow paths each extending approximately in the X direction. This makes it possible to make the plurality of flow paths for air-cooling the power transmitting coil 3 spatially independent from one another.

[0043] Each rib 52 may be made of a material (e.g., resin) having a lower thermal conductivity than metal, which can suppress heat transfer from one flow path to another among the multiple flow paths, thereby making the multiple flow paths thermally independent.

[0044] 5, the end face on the +Z side of each rib 52 may be in contact with the magnetic plate 11. The multiple power transmitting coils 3 may be adhered to the magnetic plate 11. In this way, the multiple ribs 52 can support the multiple power transmitting coils 3 via the magnetic plate 11.

[0045] The magnetic plate 11 may be made of a material (e.g., ferrite) that is magnetic and has a higher thermal conductivity than the ribs 52. This allows the magnetic flux generated by the power transmission coil 3 to be homogenized to some extent by the magnetic plate 11 during charging and sent to the object to be charged 200, and allows the heat of the power transmission coil 3 to be transferred to a plurality of flow paths and efficiently dissipated. In other words, the heat of the power transmission coil 3 can be efficiently dissipated without providing a metal plate for dissipating the heat of the power transmission coil 3. This allows the heat dissipation configuration to be made lighter.

[0046] The thickness of the sheet 20 is thinner than the thickness of the side plate portion 21. The total thickness of the sheet 20 and the substrate 7 is thinner than the thickness of the side plate portion 21. This makes it possible to shorten the distance between the power transmitting coil 3 and the main surface 2a, and to easily shorten the Z distance between the power transmitting coil 3 and the power receiving coil 203 (see FIGS. 1 and 2) during charging. This makes it possible to improve the charging efficiency of the charging device 1.

[0047] The sheet 20 may be made of an insulating material, which can suppress the charging device 1 from being charged after charging is completed and can provide a countermeasure against static electricity during handling.

[0048] The sheet 20 may be made of a water-repellent material, which can prevent water from entering the space inside the housing 2.

[0049] By making the sheet 20 a separate member from the side plate portion 21, it is possible to provide a wide range of patterns, colors, materials, etc. This can improve the design of the charging device 1 and ensure the degree of freedom in designing the charging device 1.

[0050] 6, the sheet 20 and the substrate 7 may be fastened to the side plate 21 from the +Z side with screws 12_1 to 12_4 in a manner sandwiching the power transmitting coils 3_1 to 3_3 and the magnetic plate 11. The power transmitting coils 3_1 to 3_3 may be connected to a control board 14 by wiring so as to enable the power transmitting coils 3_1 to 3_3 to be energized independently of one another, and the control board 14 may be housed inside the side plate 21. The component group 4 may be connected to each of the power transmitting coils 3_1 to 3_3 via wiring of the substrate 8, wiring of the control board 14, and wiring of the power transmitting coil 3. The bottom plate 22 may be fastened to the side plate 21 from the -Z side with screws 13_1 to 13_6.

[0051] As described above, in the charging device 1, the space near the power transmission coil 3 and the space near the component group 4 are separated by the plate-shaped portion 5, and the fan 6 is disposed on the side of the plate-shaped portion 5. This makes it possible to spatially separate the flow path for air-cooling the power transmission coil 3 and the flow path for air-cooling the component group 4 from each other. As a result, the power transmission coil 3 and the component group 4 can be efficiently air-cooled in parallel.

[0052] Furthermore, in the charging device 1, the space near the power transmission coil 3 is divided into a plurality of flow paths by the plurality of ribs 52 of the plate-shaped portion 5. This makes it possible to spatially separate the plurality of flow paths for air-cooling the power transmission coil 3 from one another. As a result, the power transmission coil 3 can be air-cooled efficiently.

[0053] In addition, in the charging device 1, the space near the power transmitting coil 3 is divided into a plurality of flow paths by the plurality of ribs 52 of the plate-shaped portion 5, and supports the power transmitting coil 3. This allows the configuration for dividing the flow paths and the configuration for supporting the power transmitting coil 3 to be shared, and the configuration of the charging device 1 can be easily made compact.

[0054] The plate-shaped portion 5 and the side plate portion 21 may be separate bodies. In this case, the plate-shaped portion 5 may be called a panel. The panel can be considered to be disposed inside the housing 2.

[0055] As a modification of the embodiment, the charging device 101 may have a bottom connector type configuration as shown in Fig. 13 and Fig. 14. Fig. 13 is a perspective view showing the external configuration of the charging device 101. Fig. 14 is an exploded perspective view showing the configuration of the charging device 101.

[0056] The charging device 101 has a connector 118 instead of the connector 18 (see Figs. 3 and 6). The connector 118 is disposed on the bottom surface 2b. The connector 118 may protrude from the bottom surface 2b to the -Z side. A connector on the vehicle side (not shown) can be fitted into the connector 118. When the connector 118 is a female connector, the connector on the vehicle side is a male connector, and when the connector 118 is a male connector, the connector on the vehicle side is a female connector. Figs. 13 and 14 illustrate the case where the connector 118 is a female connector.

[0057] In response to arranging the connector 118 on the bottom surface 2b, the hole 18a (see FIGS. 3 and 6) of the side plate portion 21 on the side surface 2g may be blocked. For example, when the bottom plate portion 122 is formed by sheet metal processing, the bottom plate portion 122 may have a rising portion 118a at a position corresponding to the hole 18a. The rising portion 118a rises from the edge portion on the +X side of the bottom surface 2b to the +Z side by a Z length corresponding to the Z width of the side plate portion 21. The rising portion 118a blocks the hole 18a when the bottom plate portion 122 is combined with the side plate portion 21.

[0058] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope of the invention and its equivalents described in the claims, as well as in the scope and spirit of the invention. [Explanation of symbols]

[0059] 1,101 Charging equipment 2. Chassis 3,3_1~3_3 Transmission coil 4 Parts 5 Plate-shaped part 6 Fans 41 Control parts 42 Power supply components 43 Power supply components 51 Flat plate part 52 Ribs

Claims

1. a housing having a main surface extending in a first direction and a second direction intersecting the first direction; a plate-shaped portion disposed in the housing and extending in the first direction and the second direction; a coil disposed between the main surface and the plate-shaped portion in a third direction intersecting the first direction and the second direction; a group of components arranged on an opposite side of the coil with the plate-shaped portion therebetween in the third direction; a fan disposed in a third space that communicates in the first direction with a first space between the plate-shaped portion and the coil and a second space between the plate-shaped portion and the group of components; A charging device comprising:

2. the first space includes a first flow path extending along the first direction and leading to the third space, The second space includes a second flow path extending along the first direction and leading to the third space. The charging device according to claim 1 .

3. The plate-shaped portion has a surface facing the coil, the surface having a plurality of ribs extending in the first direction and aligned in the second direction, The first space includes a plurality of the first flow paths separated by the plurality of ribs. The charging device according to claim 2.

4. The plurality of ribs support the coil. The charging device according to claim 3.

5. A ratio of an area of ​​a communicating portion between the first space and the third space to an area of ​​a communicating portion between the second space and the third space corresponds to a flow rate ratio between the first flow path and the second flow path. The charging device according to claim 2.

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