JP6431151B2 - Power switching equipment - Google Patents

Description

  The present invention relates to a power switching device, and more particularly to a power switching device for an electric vehicle.

  Electric vehicles have an unparalleled advantage in terms of energy saving and environmental protection due to their remarkable features of high efficiency, energy saving, low noise and zero emissions. In recent years, important technologies centered on power batteries, motors, control systems, in-vehicle chargers, etc. for electric vehicles have made great progress in recent years, and the safety, reliability, and lifetime of products have been clearly improved. Cost is also controlled to some extent. Since hybrid vehicles and complete electric vehicles are gradually being put into practical use and industrial miniaturization, electric vehicles have become a strategic direction for the development of the global automobile industry.

  As an important combination member of an electric vehicle, the charger of an electric vehicle receives AC power from the power grid via its input line, and outputs high-voltage DC power from its output terminal. It is a power switching device that provides a charging service to a battery pack and interactively communicates with a battery management system (BMS) in real time through its own communication interface. Improving the overall performance and cost control of in-vehicle chargers has been one of the influential factors that limit large-scale mass production of electric vehicles, and the level of electrical performance, structural design and thermal management has been in-vehicle chargers. It is one of the most important indicators when comprehensively evaluating and judging performance.

  One aspect of the present invention relates to a power switching device. The power switching device includes a heat dissipation base, a DC / DC converter circuit board assembly, an in-vehicle charger circuit board assembly, and at least one electric wire. The heat dissipation base has a first surface and a second surface facing each other. A DC / DC converter circuit board assembly is provided on the first surface. The on-board charger circuit board assembly is electrically connected to the DC / DC converter circuit board assembly and provided on the first surface. The electric wire has one end connected to the DC / DC converter circuit board assembly and the other end connected to the in-vehicle charger circuit board assembly.

  In one or more embodiments, the power switching device further comprises an electromagnetic interference controller circuit board assembly provided on the first surface.

  In one or more embodiments, the DC / DC converter circuit board assembly is provided below the in-vehicle charger circuit board assembly so as to be disposed in parallel with the electromagnetic interference controller circuit board assembly.

  In one or more embodiments, the power switching device further comprises a top cap. The top cap covers the first surface and has a space between the first surface and the DC / DC converter circuit board assembly and the in-vehicle charger circuit board assembly are both located in the space. To do.

  In one or more embodiments, the heat dissipation base has a flow path that is at least partially located on the second surface. The power switching device further includes a sealing member that seals the flow path.

  In one or more embodiments, the sealing member is a stamping member.

  In one or more embodiments, the power switching device further includes a distributor connected to the heat dissipation base and having at least a portion of a sealing member between the heat dissipation base.

  In one or more embodiments, the heat dissipation base has a flow path that is at least partially located on the second surface. The power switching device further includes a power distributor having a bottom plate connected to the heat dissipation base and sealing the flow path.

  In one or more embodiments, the power distributor has at least one sidewall. The side wall forms a storage space with the bottom plate, and the bottom plate further protrudes from the side of the side wall away from the storage space.

  In one or more embodiments, the side wall and the bottom plate are integrally formed.

  In one or more embodiments, the heat dissipation base has a through hole that penetrates the first surface and the second surface. The power switching device further includes a sealing ring at least partially positioned on the second surface so as to surround the through hole.

  In summary, the above embodiment of the present invention has at least the following merits as compared with the conventional prior art.

  (1) Since both the DC / DC converter circuit board assembly and the in-vehicle charger circuit board assembly are located on the same side of the heat dissipation base, the DC / DC converter circuit board assembly and the in-vehicle charger circuit board assembly The relative positions of the three-dimensional body and the heat dissipation base become closer, and the volume of the entire power switching device is effectively reduced.

  (2) The power distributor is spread over the heat contact base, and at least a part of the sealing member is located between the heat dissipation base and the power distribution base, that is, the sealing member seals the flow path of the heat dissipation base. In addition, since the power distributor is connected, the structure of the entire power switching device is simplified.

  (3) Since the distributor has a bottom plate that seals the flow path of the heat dissipation base, the bottom plate can be used to seal the flow path of the heat dissipation base at the same time as part of the power distribution unit. Thus, the structure of the entire power switching device is simplified. Moreover, since the case of a power distribution device can be manufactured with a casting mold in the manufacturing process of a power distribution device, the development cost of a metal mold | die is reduced effectively.

1 is a combination diagram of a power switching device according to an embodiment of the present invention. It is a top surface exploded view which shows the electric power switching apparatus of FIG. It is a bottom surface exploded view which shows the electric power switching apparatus of FIG. It is sectional drawing which follows the line segment X of FIG. It is a bottom surface exploded view which shows the thermal radiation base and power distributor of FIG. It is an enlarged view which shows a part of range M of FIG. It is an enlarged view which shows the power distributor of FIG. It is a bottom surface exploded view showing a heat dissipation base and a power distributor according to another embodiment of the present invention. It is sectional drawing which follows the line segment Y of FIG. 2 is a combination diagram illustrating a power switching device according to another embodiment of the present invention; FIG.

  Hereinafter, in order to better understand embodiments of the present invention, examples will be described in detail with reference to the accompanying drawings. However, the provided examples are not intended to limit the scope of the present invention, The description of the operation is not intended to limit the execution order. Any structure that has been recombined from the elements, and any devices with equivalent effects thereby, are within the scope of the present invention. Also, according to industry standards and common practice, the drawings are for illustration only and are not drawn to scale. For illustration purposes, each characteristic size may be arbitrarily increased or decreased in practice. In order to facilitate understanding, the following description will be given by attaching the same symbols to the same elements.

  Unless otherwise stated, the terms used in the entire specification and claims usually have the general meaning of each term used in this field for the contents and special contents of this disclosure. Certain terms for describing the present disclosure are discussed below or elsewhere in this specification so as to provide those of ordinary skill in the art with out-of-the-box guidance for descriptions relating to the present disclosure.

  In addition, the terms “comprising”, “including”, “having”, “containing” and the like used in the present invention are all open terms, that is, include the meaning of “including, but not limited to”. Also, “and / or” as used in the present invention includes any one or more of the associated listed items and all combinations thereof.

  In the present invention, when an element is said to be “connected” or “coupled”, it can refer to “electrically connected” or “electrically coupled”. A “connection” or “coupling” can also represent a cooperative operation or interaction between two or more elements. Further, in the present invention, different elements are indicated by terms such as “first”, “second”, etc., but this term is only for distinguishing elements or operations described in the same technical term. . Unless explicitly stated above or below, this term does not specifically indicate or suggest order or order, nor is it intended to limit the invention.

  Please refer to FIG. FIG. 1 is a combination diagram illustrating a power switching device 100 according to an embodiment of the present invention. The power switching device 100 is attached to an electric vehicle (not shown). The AC power grid on the ground is electrically connected to the battery set of the electric vehicle via a cable to charge the electric vehicle.

  Please refer to FIGS. FIG. 2 is an exploded top view showing the power switching device 100 of FIG. FIG. 3 is an exploded bottom view showing the power switching device 100 of FIG. As illustrated in FIGS. 2 to 3, the power switching device 100 includes a heat dissipation base 110, a DC / DC (direct current to direct current) converter 120, and an on-board charger module (OBCM). A circuit board assembly 130 and at least one electric wire 125 are provided. The heat dissipation base 110 has a first surface 111 and a second surface 112 that face each other. A DC / DC converter circuit board assembly 120 is provided on the first surface 111 of the heat dissipation base 110. The in-vehicle charger circuit board assembly 130 is provided on the first surface 111 of the heat dissipation base 110 so as to be electrically connected to the DC / DC converter circuit board assembly 120. Since the electric wire 125 has one end 125a connected to the DC / DC converter circuit board assembly 120 and the other end 125b connected to the in-vehicle charger circuit board assembly 130, the in-vehicle charger circuit board assembly 130 is Electrically connected to the DC / DC converter circuit board assembly 120.

  That is, the DC / DC converter circuit board assembly 120 and the in-vehicle charger circuit board assembly 130 are both provided on the first surface 111 of the heat dissipation base 110, that is, both are on the same side of the heat dissipation base 110. To position. In this manner, the relative positions of the DC / DC converter circuit board assembly 120, the in-vehicle charger circuit board assembly 130, and the heat dissipation base 110 become closer, and the volume of the entire power switching device 100 is effectively reduced. Become.

  Please refer to FIG. FIG. 4 is a cross-sectional view taken along line X in FIG. Specifically, as shown in FIG. 4, in this embodiment, the DC / DC converter circuit board assembly 120 is further provided at least partially under the on-vehicle charger circuit board assembly 130, and Since it is close to the output diode 135 of high-voltage DC power, the structural density of the power switching device 100 is increased, which contributes to the arrangement of the flow path 113 (not shown in FIGS. 1 to 4, see FIGS. 5 to 6) in the power switching device 100. The power density of the power switching device 100 can be improved.

  More specifically, as shown in FIGS. 2 to 3, the power switching device 100 further includes an electromagnetic interference controller circuit board assembly 140. In the present embodiment, the electromagnetic interference controller circuit board assembly 140 is provided on the first surface 111 of the heat radiating base 110 so as to be arranged in parallel with the DC / DC converter circuit board assembly 120. The DC converter circuit board assembly 120 and the in-vehicle charger circuit board assembly 130 are located on the same side of the heat dissipation base 110. Thus, the relative positions of the DC / DC converter circuit board assembly 120, the on-board charger circuit board assembly 130, the electromagnetic interference controller circuit board assembly 140, and the heat dissipation base 110 become closer, and the power switching device. The entire volume of 100 is effectively reduced.

  1 to 4, the power switching device 100 further includes a top cap 150. The top cap 150 covers the first surface 111 of the heat dissipation base 110, and there is a space S between the first cap 111 and the top cap 150. The DC / DC converter circuit board assembly 120, the in-vehicle charger circuit board assembly 130, and the electromagnetic interference controller circuit board assembly 140 are all located in the space S.

  Please refer to FIG. FIG. 5 is an exploded bottom view showing the heat dissipation base 110 and the power distributor 170 of FIG. As shown in FIG. 5, the heat dissipation base 110 has a flow path 113 at least partially located on the second surface 112. In the present embodiment, the flow path 113 is preferably used to circulate a coolant (not shown) and carry away heat generated by the operation of the power switching device 100. In order to reduce the possibility that the cooling liquid overflows from the flow path 113, the power switching device 100 further includes a sealing member 160 that seals the flow path 113. The sealing member 160 may be a stamping member manufactured by means of stamping. As an example, the material of the sealing member 160 may be the aluminum material AL5052, but the present invention is not limited thereto.

  1 to 5, the power switching device 100 further includes a power distribution unit (PDU) 170. In the present embodiment, in terms of the structure, the power distributor 170 is connected to the heat dissipation base 110. As shown in FIG. 5, at least a part of the sealing member 160 is located between the heat dissipation base 110 and the power distributor 170. That is, since the sealing member 160 seals the flow path 113 of the heat radiating base 110 and the power distributor 170 is provided thereon by screw holes and bolts, the overall structure of the power switching device 100 is simplified. In practical application, the case of the distributor 170 may be manufactured by means of die-casting.

  Further, as shown in FIG. 5, the heat dissipation base 110 has a through hole 114. The through-hole 114 penetrates the first surface 111 (see FIG. 2) and the second surface 112, passes a wire (not shown), electrically connects the power switching device 100, and distributes 170. And DC / DC converter circuit board assembly 120 and in-vehicle charger circuit board assembly 130 are preferably used for electrical connection.

  See FIG. FIG. 6 is an enlarged view showing a part of the range M in FIG. In order to avoid that the coolant flows into the through hole 114 and affects the operation of the power switching device 100, the power switching device 100 is at least partially surrounded by the through hole 114, as shown in FIG. 6. A sealing ring 180 is further provided on the second surface 112 of the heat dissipation base 110. Thus, the possibility that the coolant flows into the through hole 114 is effectively reduced, and the service life of the power switching device 100 is thereby effectively increased.

  Please refer to FIG. FIG. 7 is an enlarged view showing the power distributor 170 of FIG. As shown in FIG. 7, a through hole 175 is provided on one surface of the power distribution unit 170 facing the heat dissipation base 110 (see FIGS. 1 to 6), and the position of the through hole 175 is a through hole 114 (FIGS. 5 to 6). For example, the wire passing through the through hole 114 can be electrically connected to the power distributor 170 through the through hole 175.

  Please refer to FIG. FIG. 8 is an exploded bottom view showing a heat dissipation base 110 and a power distributor 170 according to another embodiment of the present invention. In the present embodiment, as shown in FIG. 8, the power distributor 170 has a bottom plate 171 that seals the flow path 113 of the heat dissipation base 110. That is, as a part of the power distributor 170, the bottom plate 171 can be used to seal the flow path 113 of the heat dissipation base 110 at the same time. In this way, the overall structure of the power switching device 100 is simplified. Further, in the manufacturing process of the power distributor 170, the case of the power distributor 170 and the bottom plate 171 can be manufactured by a single casting mold, thereby effectively reducing the development cost of the mold.

  See FIG. FIG. 9 is a cross-sectional view taken along line Y in FIG. Specifically, as shown in FIG. 9, the power distributor 170 has at least one side wall 172. The side wall 172 and the bottom plate 171 together form a storage space A. The bottom plate 171 further protrudes from one side away from the storage space A of the side wall 172. Thus, as described above, the bottom plate 171 can seal the flow path 113 of the heat dissipation base 110 (see FIG. 8). In order to further improve the structural strength of the side wall 172 and the bottom plate 171, the side wall 172 and the bottom plate 171 may be further integrally formed, but the present invention is not limited thereto.

  Please refer to FIG. FIG. 10 is a combination diagram illustrating a power switching apparatus 100 according to another embodiment of the present invention. In practical application, when the heat dissipating base 110 has a fuse (not shown) therein and no relay (not shown) in the power distributor 170, the power distributor 170 has a capacity relative to the volume of the heat dissipating base 110. Effective. In this case, as shown in FIG. 10, the power distributor 170 may have a plurality of mounting flanges 173 located in the housing of the power distributor 170. The mounting flange 173 corresponds to the screw hole in the heat radiating base 110 and the through hole of the sealing member 160 (in FIG. 10, both the screw hole in the heat radiating base 110 and the through hole of the sealing member 160 are blocked by the mounting flange 173). A through-hole 174 is formed. In this way, the user can fix the through hole 174 to the screw hole with the lock member 190 such as a screw, and then easily and easily fix the power distributor 170 to the heat dissipation base 110. . Thus, according to different function requirements of the power distributor 170, the user can still effectively reduce the mold cost and unit price by using the same case of the heat dissipation base 110. In the present embodiment, as shown in FIG. 8, the number of mounting flanges 173 may be three, but the present invention is not limited thereto.

  In summary, the technical solution of the present invention has clear advantages and beneficial effects as compared with the conventional technology. By the above technical method, considerable technical progress can be achieved, and it has a wide industrial utility value, and has at least the following merits.

  (1) Since both the DC / DC converter circuit board assembly and the in-vehicle charger circuit board assembly are located on the same side of the heat dissipation base, the DC / DC converter circuit board assembly and the in-vehicle charger circuit board assembly The relative positions of the three-dimensional body and the heat dissipation base become closer, and the volume of the entire power switching device is effectively reduced.

  (2) The power distributor is spread over the heat contact base, and at least a part of the sealing member is located between the heat dissipation base and the power distribution base, that is, the sealing member seals the flow path of the heat dissipation base. At the same time, since it is connected to the power distributor, the structure of the entire power switching device is simplified.

  (3) Since the distributor has a bottom plate that seals the flow path of the heat dissipation base, the bottom plate can be used to seal the flow path of the heat dissipation base at the same time as part of the power distribution unit. Thus, the structure of the entire power switching device is simplified. Further, since the distributor case can be manufactured by a single casting mold in the manufacturing process of the distributor, the development cost of the mold is effectively reduced.

  One skilled in the art can readily appreciate the merits of one or more of the examples achieved by the disclosed embodiments. After reading this specification, skilled artisans may make various changes, substitutions, equivalents and various other examples to the content disclosed herein. For this reason, the protection scope of the present invention mainly includes the claims and their equivalents.

DESCRIPTION OF SYMBOLS 100 Power switching apparatus 110 Radiation base 111 1st surface 112 2nd surface 113 Flow path 114, 174, 175 Through-hole 120 DC / DC converter circuit board assembly 125a One end 125b Other end 130 Car-mounted charger circuit board assembly 135 Output Diode 140 Electromagnetic Interference Controller Circuit Board Assembly 150 Top Cap 160 Sealing Member 170 Power Distributor 171 Bottom Plate 172 Side Wall 173 Mounting Flange 180 Sealing Ring 190 Locking Member A Storage Space M Range S Space X, Y Line Segment

Claims (9)

A heat dissipating base having opposing first and second surfaces ;
An in-vehicle charger circuit board assembly provided on the first surface;
A DC / DC converter circuit board assembly provided on the first surface and provided under the in-vehicle charger circuit board assembly;
At least one electrical wire having one end connected to the DC / DC converter circuit board assembly and the other end connected to the in-vehicle charger circuit board assembly;
An electromagnetic interference controller circuit board assembly provided on the first surface and disposed in parallel with the DC / DC converter circuit board assembly;
A power switching device comprising: The first surface is covered and there is a space between the first surface, and both the DC / DC converter circuit board assembly and the in-vehicle charger circuit board assembly are in the space. The power switching device according to claim 1, further comprising a top cap. The heat dissipating base has a flow path at least partially located on the second surface;
The channel power switching device according to any one of claims 1 and 2 further comprising a sealing member for sealing the. The power switching device according to claim 3 , wherein the sealing member is a stamping member. The power switching device according to claim 3 , further comprising a power distributor connected to the heat dissipation base and having at least a part of the sealing member between the heat dissipation base. The heat dissipating base has a flow path at least partially located on the second surface;
The power switching device according to any one of claims 1 and 2 , further comprising a power distributor having a bottom plate connected to the heat dissipation base and sealing the flow path. The distributor has at least one sidewall, said to form a receiving space together with the side walls and the bottom plate, and power according to claim 6, wherein the bottom plate is further projected from a side away from the receiving space of the side wall Switching device. The power switching device according to claim 7 , wherein the side wall and the bottom plate are integrally formed. The heat dissipation base has a through-hole penetrating the first surface and the second surface;
The power switching device according to any one of claims 1 to 8 , further comprising a sealing ring at least partially positioned on the second surface so as to surround the through hole.

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