CN107809172B

CN107809172B - Power supply conversion device

Info

Publication number: CN107809172B
Application number: CN201710696050.1A
Authority: CN
Inventors: 尤培艾; 孙浩; 章进法
Original assignee: Teda Electronic Ltd By Share Ltd
Current assignee: Teda Electronic Ltd By Share Ltd
Priority date: 2016-09-09
Filing date: 2017-08-15
Publication date: 2020-01-31
Anticipated expiration: 2037-08-15
Also published as: JP6431151B2; CN107809172A; TW201811592A; JP2018042455A; TWI653164B

Abstract

A power conversion device comprises a heat dissipation base, a DC-DC converter circuit board assembly, a vehicle charger circuit board assembly and at least electric wires, wherein the heat dissipation base is provided with a th surface and a second surface which are opposite, the DC-DC converter circuit board assembly is arranged on a th surface, the vehicle charger circuit board assembly is arranged on a th surface, a end of the electric wire is connected with the DC-DC converter circuit board assembly, and the end of the electric wire is connected with the vehicle charger circuit board assembly.

Description

Power supply conversion device

Technical Field

The invention relates to power conversion devices, in particular to power conversion devices for electric automobiles.

Background

Recently, in the world, core key technologies such as power batteries, motors, control systems and vehicle-mounted chargers for electric automobiles are greatly improved, the safety, reliability and service life of products are obviously improved, the cost is controlled at , hybrid electric automobiles and pure electric automobiles are gradually in practical and small-production stages, and the electric automobiles become the strategic direction of the development of the automobile industry in the world.

, which is a key accessory of an electric vehicle, a charger of the electric vehicle is kinds of power conversion devices, the input end of which receives alternating current from a power grid through an input line and outputs high-voltage direct current at the output end of the power conversion devices, so as to provide charging service for a vehicle-mounted high-voltage Battery Pack (Battery Pack), and maintain real-time interactive communication with a Battery Management System (BMS) through a communication interface thereof, the improvement of the comprehensive performance and the cost control of the vehicle-mounted charger are which is the influencing factor restricting the electric vehicle from entering large-scale mass production, and the electric performance, the structural design and the thermal management level are which is the most key index for comprehensively evaluating and measuring the performance of the vehicle-mounted charger.

Disclosure of Invention

The invention discloses aspects relating to power conversion devices, which comprise a heat dissipation base, a DC-DC converter circuit board assembly, a vehicle-mounted charger circuit board assembly and at least electric wires, wherein the heat dissipation base is provided with a surface and a second surface which are opposite, the DC-DC converter circuit board assembly is arranged on the surface, the vehicle-mounted charger circuit board assembly is arranged on the surface, the end of the electric wire is connected with the DC-DC converter circuit board assembly, and the end of the electric wire is connected with the vehicle-mounted charger circuit board assembly.

In or more embodiments, the power conversion device further comprises an emi controller board assembly disposed on the surface.

In one or more of the embodiments, the dc-to-dc converter circuit board assembly is disposed below the in-vehicle charger circuit board assembly, and the emi controller circuit board assembly is disposed in parallel with the dc-to-dc converter circuit board assembly.

In or more embodiments, the power conversion device further comprises a cover covering the th surface, the cover having a space between the th surface, the dc-to-dc converter circuit board assembly and the vehicle charger circuit board assembly being located in the space.

In or more embodiments, the heat sink base has a flow channel at least partially on the second surface the power conversion device further comprises a seal that seals the flow channel.

In or more embodiments, the seal is a sheet metal part.

In or more embodiments, the power conversion device further comprises a power distributor coupled to the heat sink base, and the seal is at least partially positioned between the heat sink base and the power distributor.

In or more embodiments, the heat sink base has a flow channel at least partially on the second surface, the power conversion device further comprises a power distributor coupled to the heat sink base, the power distributor having a bottom plate that seals the flow channel.

In or more embodiments, the power distributor has at least side walls, the side walls and the bottom plate together form a receiving space, and the bottom plate protrudes further from the side of the side walls away from the receiving space.

In or more embodiments, the side walls are integrally formed with the bottom panel .

In or more embodiments, the heat sink base has a through hole that extends through the th surface and the second surface the power conversion device further comprises a sealing ring that is at least partially disposed on the second surface and surrounds the through hole.

In summary, the above embodiments of the present invention have at least the following advantages compared to the prior art:

(1) because the direct current-to-direct current converter circuit board assembly and the vehicle-mounted charger circuit board assembly are both positioned on the same side of the heat dissipation base, shows that the relative positions of the direct current-to-direct current converter circuit board assembly, the vehicle-mounted charger circuit board assembly and the heat dissipation base are tighter, so that the overall size of the power conversion device is effectively reduced.

(2) The power supply distributor is connected with the heat dissipation base, and the sealing piece is at least partially positioned between the heat dissipation base and the power supply distributor, namely, the sealing piece seals a flow channel of the heat dissipation base and is simultaneously connected with the power supply distributor, so that the overall structure of the power supply conversion device is simplified.

(3) Therefore, the bottom plate can be used as the part of the power supply distributor to seal the flow channel of the heat dissipation base, so that the simplifies the whole structure of the power conversion device, and moreover, in the manufacturing process of the power supply distributor, the shell of the power supply distributor can be manufactured by a pair of die casting molds, so that the development cost of the molds is effectively reduced.

Drawings

FIG. 1 is an assembled view of an embodiment of a power conversion device according to the present disclosure;

FIG. 2 is an exploded top view of the power conversion device of FIG. 1;

FIG. 3 is an exploded bottom view of the power conversion device of FIG. 1;

FIG. 4 is a cross-sectional view taken along line X of FIG. 1;

FIG. 5 is an exploded bottom view of the heat sink base and power distributor of FIG. 1;

FIG. 6 is a partial enlarged view showing a range M of FIG. 5;

FIG. 7 is an enlarged view of the power distributor of FIG. 1;

FIG. 8 is an exploded bottom view of a heat sink base and power distributor according to another embodiment of the present invention;

FIG. 9 is a cross-sectional view taken along line Y of FIG. 8; and

fig. 10 is an assembly diagram of a power conversion device according to another embodiment of the invention .

Detailed Description

The following embodiments are provided to better understand the embodiments of the present invention with reference to the detailed description of the accompanying drawings, but the embodiments are not provided to limit the scope of the invention, the description of the structural operations is not provided to limit the execution sequence thereof, and any structure with equivalent functions generated by the recombination of elements is included in the scope of the invention. Moreover, the drawings are for illustrative purposes only and are not drawn to scale in accordance with industry standard and conventional practice, and the dimensions of the various features may be arbitrarily increased or decreased for clarity of illustration. In the following description, the same elements will be described with the same reference numerals for ease of understanding.

The term (terms) used throughout the specification and claims has the ordinary meaning as commonly understood in the art, in the disclosure herein and in the claims, unless otherwise indicated. Certain terms used to describe the present disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present disclosure.

Furthermore, as used herein, the terms "comprising," including, "" having, "" containing, "and the like, are open-ended terms that mean" including, but not limited to.

In addition, although the terms "", "second", …, etc. are used herein to describe various elements, these terms are used merely to distinguish one element from another element or operation described using the same technical terms, unless the context clearly dictates otherwise, the terms are not intended to refer or imply any particular order or sequence nor limitations.

Referring to fig. 1, an assembly diagram of a power conversion device 100 according to an embodiment of the invention is shown, the power conversion device 100 is installed on an electric vehicle (not shown), and electrically connects a ground ac power grid to a battery pack of the electric vehicle through a cable to charge the electric vehicle.

Referring to fig. 2 to 3, fig. 2 illustrates an exploded top view of the power conversion device 100 of fig. 1, fig. 3 illustrates an exploded bottom view of the power conversion device 100 of fig. 1, as shown in fig. 2 to 3, power conversion devices 100 include a heat dissipation base 110, a direct current to direct current (DC/DC) converter circuit board assembly 120, an On Board Charger (OBCM) circuit board assembly 130, and at least wires 125, the heat dissipation base 110 has an surface 111 and a second surface 112 opposite to each other, the DC to DC converter circuit board assembly 120 is disposed on a surface 111 of the heat dissipation base 110, the on board charger circuit board assembly 130 is disposed on a surface 111 of the heat dissipation base 110, a end 125a of the wires 125 is connected to the DC converter circuit board assembly 120, and another end 125b is connected to the on board charger circuit board assembly 130, so that the on board charger assembly 130 is electrically connected to the DC converter circuit board assembly 120.

That is, the dc-dc converter circuit board assembly 120 and the vehicle charger circuit board assembly 130 are both disposed on the th surface 111 of the heat dissipation base 110, i.e. the dc-dc converter circuit board assembly 120 and the vehicle charger circuit board assembly 130 are both located on the same side of the heat dissipation base 110, so , the relative positions of the dc-dc converter circuit board assembly 120, the vehicle charger circuit board assembly 130 and the heat dissipation base 110 are closer, so that the overall size of the power conversion device 100 is effectively reduced.

Referring to fig. 4, a cross-sectional view along line X of fig. 1 is shown. Specifically, as shown in fig. 4, in the present embodiment, the dc-dc converter circuit board assembly 120 may be disposed at least partially under the vehicle-mounted charger circuit board assembly 130 and close to the output diode 135 of the high voltage dc power, so as to increase the structural density of the power conversion device 100, and facilitate the arrangement of the flow channel 113 (not shown in fig. 1 to 4, refer to fig. 5 to 6) in the power conversion device 100, thereby increasing the power density of the power conversion device 100.

, as shown in fig. 2 to 3, the power conversion device 100 further includes an emi controller circuit board assembly 140. in this embodiment, the emi controller circuit board assembly 140 is disposed on the -th surface 111 of the heat dissipation base 110 and is juxtaposed to the dc-to-dc converter circuit board assembly 120, so that the emi controller circuit board assembly 140, the dc-to-dc converter circuit board assembly 120 and the vehicle charger circuit board assembly 130 are all located on the same side of the heat dissipation base 110, and thus , the relative positions of the dc-to-dc converter circuit board assembly 120, the vehicle charger circuit board assembly 130, the emi controller circuit board assembly 140 and the heat dissipation base 110 are closer, so that the overall size of the power conversion device 100 is effectively reduced.

Furthermore, as shown in fig. 1 to 4, the power conversion device 100 further includes a top cover 150, the top cover 150 covers the th surface 111 of the heat dissipation base 110, a space S is formed between the top cover 150 and the th surface 111, and the dc-dc converter circuit board assembly 120, the vehicle-mounted charger circuit board assembly 130 and the electromagnetic interference controller circuit board assembly 140 are all located in the space S.

Referring to fig. 5, an exploded bottom view of the heat dissipation base 110 and the power distributor 170 of fig. 1 is shown. As shown in fig. 5, the heat dissipation base 110 has a flow channel 113, and the flow channel 113 is at least partially located on the second surface 112. In the present embodiment, the flow channel 113 is suitable for flowing a cooling liquid (not shown) to remove heat generated by the operation of the power conversion apparatus 100. To reduce the chance of coolant escaping from the flow channel 113, the power conversion device 100 further includes a sealing member 160, and the sealing member 160 seals the flow channel 113. The seal 160 may be a sheet metal part and made by stamping. For example, the material of the sealing member 160 may be an aluminum material AL5052, but the invention is not limited thereto.

Furthermore, as shown in FIGS. 1 to 5, the Power conversion apparatus 100 further includes a Power Distribution Unit (PDU) 170. In the present embodiment, the power distributor 170 is structurally connected to the heat dissipation base 110, and, as shown in fig. 5, the sealing member 160 is at least partially located between the heat dissipation base 110 and the power distributor 170. That is, the sealing member 160 seals the flow channel 113 of the heat sink base 110 and also allows the power distributor 170 to be disposed thereon, so that the overall structure of the power conversion apparatus 100 is simplified. In practical applications, the housing of the power distributor 170 may be made by die-casting (die-casting).

In addition, as shown in fig. 5, the heat dissipation base 110 has a through hole 114, the through hole 114 penetrates the th surface 111 (see fig. 2) and the second surface 112, and the through hole 114 is suitable for passing through an electric wire (not shown) so as to electrically connect the power conversion device 100, and the power distributor 170 is electrically connected to the dc-dc converter circuit board assembly 120 and the vehicle charger circuit board assembly 130, respectively.

Referring to fig. 6, an enlarged view of a portion of the range M in fig. 5 is shown, in order to prevent the cooling fluid from flowing into the through hole 114 and affecting the operation of the power conversion device 100, as shown in fig. 6, the power conversion device 100 further includes a sealing ring 180, and the sealing ring 180 is at least partially located on the second surface 112 of the heat dissipation base 110 and surrounds the through hole 114, so , the chance of the cooling fluid flowing into the through hole 114 is effectively reduced, and the service life of the power conversion device 100 is effectively increased.

Referring to fig. 7, an enlarged view of the power distributor 170 of fig. 1 is shown, as shown in fig. 7, the power distributor 170 has a through hole 175 on its surface facing the heat dissipation base 110 (see fig. 1-6), and the position of the through hole 175 corresponds to the through hole 114 of the heat dissipation base 110 (see fig. 5-6), so that the electric wire passing through the through hole 114 can also pass through the through hole 175 and is electrically connected to the inside of the power distributor 170.

Referring to fig. 8, an exploded view of the heat dissipation base 110 and the power distributor 170 according to another embodiment of the present invention is shown, in this embodiment, as shown in fig. 8, the power distributor 170 has a bottom plate 171, and the bottom plate 171 seals the flow channel 113 of the heat dissipation base 110. that is, as part of the power distributor 170, the bottom plate 171 can also be used to seal the flow channel 113 of the heat dissipation base 110. thus , the overall structure of the power conversion device 100 is simplified, and in the manufacturing process of the power distributor 170, the housing of the power distributor 170 and the bottom plate 171 can be manufactured by using a single -pair die casting mold, which effectively reduces the mold development cost.

Specifically, as shown in fig. 9, the power distributor 170 has at least side walls 172, the side walls 172 and the bottom plate 171 together form an accommodating space a, and the bottom plate 171 further protrudes from the side wall 172 away from the side of the accommodating space a. thus , as described above, the bottom plate 171 can seal the flow channel 113 (see fig. 8) of the heat dissipation base 110. the side walls 172 and the bottom plate 171 can be more shaped structures, so that the structural strength of the side walls 172 and the bottom plate 171 can be further steps improved, but the invention is not limited thereto.

Referring to fig. 10, an assembly diagram of a power conversion device 100 according to another embodiment of the invention is shown, in practical applications, when the heat dissipation base 110 has a fuse (not shown) therein and the power distributor 170 does not have a relay (not shown), the volume of the power distributor 170 relative to the heat dissipation base 110 is effectively reduced, in which case, as shown in fig. 10, the power distributor 170 may have a plurality of mounting flanges 173 on the housing of the power distributor 170, and the mounting flanges 173 have through holes 174, and the through holes 174 correspond to the screw holes of the heat dissipation base 110 and the through holes of the sealing member 160 (the screw holes of the heat dissipation base 110 and the through holes of the sealing member 160 are covered by the mounting flanges 173 in fig. 10), so that , a user may fix the through holes 174 relative to the screw holes by using a locking member 190 such as a screw, thereby simply and easily fixing the power distributor 170 to the heat dissipation base 110, so that corresponds to different functional requirements of the power distributor 170, and the user may still use the same housing of the heat dissipation base 110, effectively reduce the cost of the mold and the unit cost in this embodiment, but the invention is not limited to three shown in fig. 173.

In summary, the technical solution of the present invention has obvious advantages and beneficial effects compared with the prior art, and through the technical solution, considerable technical progress can be achieved, and the universal utilization value in industry is achieved, which has at least the following advantages:

(3) Therefore, the bottom plate can be used as the part of the power supply distributor and can also be used for sealing the flow channel of the heat dissipation base, so that the simplifies the whole structure of the power supply conversion device, and moreover, in the manufacturing process of the power supply distributor, the shell of the power supply distributor can be manufactured by a single -pair die casting mold, so that the development cost of the mold is effectively reduced.

Those skilled in the art can readily appreciate that the disclosed embodiments can be implemented as desired for purposes of illustration or other embodiments in addition to those disclosed herein.

Claims

1, A power conversion device, comprising:

heat sink base having th surface and second surface opposite to each other;

electromagnetic interference controller circuit board assembly, set on the surface;

a DC-to-DC converter circuit board assembly disposed on the surface, the EMI controller circuit board assembly and the DC-to-DC converter circuit board assembly being disposed in parallel;

vehicle charger circuit board assembly arranged on the surface, the DC-DC converter circuit board assembly arranged between the vehicle charger circuit board assembly and the surface, and

at least electric wires, wherein the end of the electric wires is connected with the DC-DC converter circuit board assembly, and the end of the electric wires is connected with the vehicle-mounted charger circuit board assembly.

2. The power conversion device of claim 1, further comprising:

top cover covering the surface, space is provided between the top cover and the surface, and the DC-DC converter circuit board assembly and the vehicle-mounted charger circuit board assembly are both located in the space.

3. The power conversion device of claim 1, wherein the heat sink base has flow channels at least partially located on the second surface, and

further comprising:

sealing the flow path.

4. The power conversion device of claim 3, wherein the seal is a sheet metal part.

5. The power conversion device of claim 3, further comprising:

a power distributor connected to the heat sink base, and the seal is located at least partially between the heat sink base and the power distributor.

6. The power conversion device of claim 1, wherein the heat sink base has flow channels at least partially located on the second surface, and

further comprising:

power distributor connected to the heat sink base, the power distributor having bottom plate sealing the flow passage.

7. The power conversion device of claim 6, wherein the power distributor has at least side walls, the side walls and the bottom plate together form a accommodating space, and the bottom plate protrudes further from the side of the side walls away from the accommodating space.

8. The power conversion device of claim 7, wherein the side walls are integrally formed with the bottom panel .

9. The power conversion device of claim 1, wherein the heat sink base has through holes penetrating the th surface and the second surface, and

further comprising:

a seal ring at least partially positioned on the second surface and surrounding the perforation.