KR102077670B1 - Cooling Structure of Integrated Power Converting Apparatus for Electric Vehicles - Google Patents

Abstract

The present invention relates to a cooling structure for an integrated power conversion apparatus of an electric vehicle, which simplifies a structure of a cooling flow path to facilitate manufacturing and assembly. According to the present invention, a cooling structure comprises a cooling plate installed in the integrated power conversion apparatus to form the same and cooling a heating body, wherein a cooling flow path structure for controlling movement of coolant is formed in the cooling plate. The cooling flow path structure comprises: a cooling flow path inlet sucking and supplying the coolant into the cooling plate; a cooling flow path outlet placed in parallel to the cooling flow path inlet and discharging the coolant; a plurality of cooling flow path channels allowing the cooling flow path inlet to communicate with the cooling flow path outlet and placed in parallel; an extended flow path extended from the first channel of an inlet side to distribute a uniform flow rate to the cooling flow path channels; and an equal-pressure control channel placed perpendicular to the cooling flow path channel on an outlet side to distribute the uniform flow rate to the cooling flow path channels and communicating with each cooling flow path channel. The cooling plate having the cooling flow path structure formed therein cools the heating body placed on either the upper or lower parts thereof.

Description

Cooling Structure of Integrated Power Converting Apparatus for Electric Vehicles}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure of an integrated power converter for an electric vehicle, and in particular, an onboard charger (OBC) and a low voltage DC-DC converter (LDC) integrated with a power converter. The present invention relates to a water-cooled cooling structure of a device, and to a high-efficiency cooling structure that solves the problem of non-uniform cooling through an equal distribution structure of cooling channels and cools by integrating a built-in charger and a DC converter in a power converter.

Eco-friendly vehicles, such as hybrid cars and electric vehicles, generate power through the drive motor, and use power conversion devices such as on-board chargers (OBCs) and direct current converters (LDCs) to supply power to the drive motors. It is included.

Since the power converter has a heating element such as various switch elements, a transformer IGBT (Insulated Gate Bipolar mode Transistor), etc., a cooling device for cooling the heat generated by the operation is required.

The cooling device is applied to the water-cooled and air-cooled according to the position in the vehicle, the water cooling is applied in front of the vehicle, commonly referred to as the engine room, and the air-cooled in the trunk room behind the vehicle.

Among these, power conversion devices such as an on-board charger (OBC) and a direct current converter (LDC), which are mounted at the front of the vehicle, are applied with a water-cooled cooling device that circulates coolant. Since the DC converter is separated from each other, each cooling structure is adopted, and the flow rate distributed to the cooling structure is unbalanced, resulting in a low cooling efficiency due to a large cooling variation depending on the position.

Therefore, the cooling flow path is shared between the on-board charger OBC and the direct current converter LDC disposed adjacent to each other for the purpose of miniaturization and improvement of cooling efficiency.

The following patent documents are known as a technology related to the cooling structure of an integrated power converter for an electric vehicle.

Republic of Korea Patent Registration No. 10-1895078 (Announcement date 2018.09.04.) Or less Patent Document 1 discloses a gasket having a flow path separation function of the cooling water mounted between the power module. In Patent Document 1, the LDC housing and the inverter housing were separately manufactured, and then the LDC housing and the inverter housing were combined with each other using a sealant.

Cooling flow paths are formed on the bottom surface of the LDC housing and the top surface of the inverter housing, respectively, and a flow path separating plate is mounted therebetween.

However, in such a structure, the shape of the cooling flow path of the inverter housing is complicated, so that it is difficult to manufacture a mold and has a lot of difficulties in post-production management.

In addition, since the inverter housing and the LDC housing are in contact with the sealant, defects are likely to occur.

In addition, Korean Patent Application Publication No. 10-2016-0051407 (published May 11, 2016) discloses a cooling flow path module for a power converter and a power converter having the same. Patent Literature 2 simplifies the structure of the cooling flow channel module mounted on the power converter, making it easy to manufacture and assemble, and to reduce the weight and volume to reduce the weight, and to design a mold for manufacturing an inverter part and a converter part (LDC, etc.). It can be simplified.

However, in Patent Literature 2, a plurality of cooling flow channels have been applied to distribute the cooling water evenly, but the flow rate distributed to the cooling structure is unbalanced because the cooling water flow rate and flow rate characteristics are not considered. There was a problem of low efficiency.

Republic of Korea Patent No. 10-1895078 (Announcement date 2018.09.04.) Republic of Korea Patent Application Publication No. 10-2016-0051407 (Published Date 2016.05.11.)

The present invention is to solve the above-mentioned problems, by simplifying the structure of the cooling flow path mounted on the integrated power converter, easy to manufacture and assemble, by forming a cooling flow path to enable an even flow rate distribution of the cooling water, It is to provide a cooling structure of an integrated power converter for an electric vehicle that allows the cooling to proceed efficiently.

Still another object of the present invention is to allow the cooling channel to be positioned between the heat generating elements generating heat of the integrated power converter so that the heat generating elements are in contact with the cooling water flow to exchange heat. It is to provide a cooling structure of an integrated power converter for an electric vehicle that minimizes the temperature deviation caused by.

Cooling plate is mounted to the integrated power converter according to the present invention for achieving the above object is provided with a cooling plate to configure the integrated power converter and to cool the heating element, the cooling oil flow structure for controlling the flow of cooling water in the cooling plate In the structure, the cooling flow path structure, the cooling flow path inlet for sucking the cooling water to supply the cooling water into the cooling plate; A cooling flow passage outlet disposed in parallel with the cooling flow passage inlet and discharging the cooling water; A cooling flow channel configured to communicate with the cooling flow passage inlet and the cooling flow passage outlet, and constituted in plural and arranged in parallel to each other; An expandable flow path formed in the first channel of the inlet side to distribute a uniform flow rate to the cooling flow channel; And a dynamic pressure control channel disposed vertically with the cooling flow channel at the outlet side to distribute a uniform flow rate to the cooling flow channel, and communicating with each cooling flow channel. The cooling plate in which the cooling flow path structure is formed is characterized by cooling a heating element disposed in at least one of an upper portion and a lower portion.

Preferably, the dynamic pressure control channel is characterized in that the flow path is formed narrower than the cooling flow channel to enable dynamic pressure control so that a uniform flow rate is distributed to each cooling flow channel.

More preferably, it characterized in that it comprises a protruding cooling unit is formed in the heat generating element protrudes the cooling flow channel to the inlet side so that the plurality of cooling flow channel is located between the heat generating elements generating heat.

Also preferably, the protruding cooling unit is formed to protrude in at least one of the upper side and the lower side according to the position of the heating element configured in the heating element.

Also preferably, a mounted charger that is a heating element provided with a heating element; A DC conversion device disposed above or below the mounted charger, the DC conversion device including a heating element; A cooling plate disposed between the mounted charger and the direct current converter, wherein the cooling plate comprises: a cooling plate lower plate having a cooling water flow portion formed therein and having a flow path guide portion to allow the cooling water to flow into each cooling flow channel; A cooling plate upper plate having a cooling water flow unit formed therein and having a flow path guide unit to form a cooling passage structure therein when combined with the cooling plate lower plate; It is provided on the lower plate, and includes an inlet side connection portion and an outlet side connection portion connected to the cooling flow path inlet and the cooling flow path outlet; Cooling the heating element disposed on at least one of the upper and lower portion of the cooling plate.

Also preferably, when the protruding cooling unit is formed on the lower plate of the cooling plate, a cooling water flow unit is provided to allow the cooling water to flow in the protruding cooling unit; The cooling plate upper plate is characterized in that it is provided with a protruding cooling separator to form a protruding cooling unit when combined with the lower plate of the cooling plate.

Also preferably, a mounted charger disposed in contact with any one of the upper or lower portion of the cooling plate; A direct current converter disposed in contact with one of the upper and lower portions of the cooling plate; The onboard charger and the direct current converter are assembled to share a cooling plate with each other, and the integrated power converter housing accommodates the onboard charger, the direct current converter and the cooling plate therein; An integrated power converter case disposed under the integrated power converter housing and supporting either the on-board charger or the direct current converter; And an integrated power converter cover disposed to cover an upper portion of the integrated power converter housing.

Also preferably, the protruding cooling separator is composed of a protruding cooling fluid plate and a flow path guide plate; The flow guide plate separates the coolant flow section at a predetermined interval so that the protruding cooling section is formed in each cooling flow channel, and guides the coolant to flow in each channel; The protruding cooling fluid plate is characterized in that the flow rate of the cooling water is formed to be uniformly distributed.

According to the cooling structure of the integrated power converter for an electric vehicle of the present invention, by simplifying the structure of the cooling plate mounted on the integrated power converter, the cooling flow path is made to be easy to manufacture and assemble, and to evenly distribute the flow rate of the cooling water. It is formed, so that the cooling can proceed efficiently, and the cooling flow channel can be located between the heat generating elements that generate heat of the integrated power converter so that the heat generating elements are in contact with the cooling water flow to exchange heat. It has the effect of minimizing the temperature deviation according to the position of the internal elements.

1 is a schematic perspective view showing the structure of a general cooling flow path structure.
2 is a configuration diagram showing a cooling structure of the integrated power converter according to the first embodiment of the present invention.
3 is a first embodiment showing the configuration of the cooling flow path structure of the present invention.
4 is a view showing the flow characteristics according to the cooling structure.
5 is a graph showing a comparison of cooling water flow rate distribution uniformity.
6 is a configuration diagram showing a cooling structure of the integrated power converter according to the second embodiment of the present invention.
7 is a second embodiment showing the configuration of the cooling flow path structure of the present invention.
8 is a perspective view showing the configuration of a cooling plate according to a second embodiment of the present invention.
9 is a detailed view showing the configuration of the lower plate of the cooling plate according to the second embodiment of the present invention.
10 is a detailed view showing the configuration of the upper plate of the cooling plate according to the second embodiment of the present invention.
11 is a perspective view showing an assembly configuration of a cooling plate according to a second embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Plug-in Hybrid Electric Vehicles (PHEVs) and Electric Vehicles (EVEVs) use high-voltage batteries to drive motors and vehicle electrical systems and charge them with on-board chargers (OBCs) and power from high to low voltages. Low DC-DC Converter (LDC) is necessary. Since OBC and LDC operate as vehicle independent systems and use separate spaces, the integrated system is called an integrated power converter.

1 is a schematic perspective view showing a cooling structure having a general cooling flow path shape, Figure 2 is a block diagram showing a cooling structure of the integrated power converter according to the first embodiment of the present invention, Figure 3 is a cooling flow path of the present invention A first embodiment showing the configuration of a cooling structure having a shape.

1 to 3, first, Figure 2 shows a cooling structure of the integrated power conversion device for an electric vehicle according to the present invention, the integrated power conversion device for an electric vehicle DC converter 20 and the mounted charger 30 ) Is provided, and the first cooling plate 150 is assembled between the DC converter 20 and the mounted charger 30 to be in contact with each other.

It is mounted on the lower portion of the integrated power converter housing 50 and the integrated power converter housing 50 to accommodate the DC converter 20, the mounted charger 30 and the first cooling plate 150 therein An integrated power converter case 51 supporting either the charger 30 or the DC converter 20 is provided, and the integrated power converter cover disposed to cover the upper portion of the integrated power converter housing 50. 52).

As a result, the first cooling plate 150 is a built-in charger 30 and a direct current conversion device (ie, a heating element 40 having a heating element disposed in contact with either one of the upper part and the lower part of the first cooling plate 150). 20) can be cooled.

As shown in FIG. 1, the general cooling flow path structure 1 applies a plurality of cooling flow path channels 11, 12, n to distribute the cooling water flow evenly, but does not take into account the characteristics of the cooling water flow rate or flow rate distributed in the channel. One flow rate distribution showed cooling deviations for each location, resulting in low cooling efficiency.

In addition, when the flow rate loss region 10 is generated with respect to the coolant flow due to the inertia of the coolant and the coolant is filled in each flow path by the initial flow, it is difficult to distribute the flow rate evenly to the plurality of cooling flow channel.

In order to improve this, FIG. 3 shows a first embodiment of a cooling passage provided in a cooling plate mounted on an integrated power converter according to the present invention to form an integrated power converter and cooling the heating element.

The first cooling channel structure 100 has a cooling channel inlet 101 for sucking the cooling water and supplying the cooling water inside the cooling plate, and a cooling channel outlet 102 for discharging the cooling water in parallel with the cooling channel inlet 101. The cooling flow passage inlet 101 and the cooling flow passage outlet 102 communicate with each other and are formed in parallel to each other, and a plurality of cooling flow channel channels 111, 112, and n are formed.

The cooling channel has a first channel formed from the inlet of the cooling channel, a first channel formed of the second channel, a second channel formed of the second channel, and an n channel formed of the nth channel. The first through n-channels are spaced at a predetermined interval. It is formed parallel to each other.

In addition, the expansion channel 110 is formed in the first channel of the inlet side, and the uniform flow rate is distributed to each cooling channel by the inertia control of the inflow cooling water by changing the area of the first channel.

As a result, the flow of the coolant does not generate a loss area for the coolant flow in accordance with the change of the channel area of the first cooling flow path when the coolant is introduced, and shows an even flow rate distribution when the coolant is filled in each flow path by the initial flow.

In addition, a first dynamic pressure control channel 120 is formed in the cooling flow channel at the outlet side to prevent a flow rate variation caused by the flow path difference of each cooling flow path, and the outlet side is formed by the first dynamic pressure control channel 120. By minimizing the flow rate variation of the cooling channel, the cooling efficiency of the cooling channel can be improved.

Referring to Figure 4, it shows a comparison of the flow characteristics according to the cooling structure, Figure 4 (a) shows a case in which a general cooling flow channel structure is applied, shows an example of the case of setting six cooling flow channel channels, uneven flow The distribution appears to indicate low cooling efficiency due to location-specific cooling variations.

FIG. 4 (b) shows a case in which the proposed extended flow path 110 and the first dynamic pressure control channel 120 are applied to the cooling channel, and the cooling channel structure is illustrated through an example in which six cooling channel channels are set. In order to prevent the flow loss area of the first cooling flow channel of the inlet side, an extended flow path 110 having changed the flow path area was applied, and at the outlet side, the first dynamic pressure control channel 120 was applied to the cooling flow structure to minimize the variation of the dynamic pressure. Indicates. The first dynamic pressure control channel 120 is formed perpendicular to the cooling channel, communicates with each cooling channel, and the channel is narrower than the channel of the cooling channel using the Bernoulli principle so as to enable dynamic pressure control. Ensure a uniform flow rate distribution.

Referring to FIG. 5, in the experimental example in which the respective cooling flow channel structures of FIG. 4 are applied, if the total flow rate is 100% in the cooling flow channel, an equal flow rate ratio distributed to the six cooling flow channel channels is about 16.67%. . The cooling channel structure of FIG. 4 (a) shows the lowest ratio of 13.19% in the first cooling channel, and the highest as 22.22% in the second cooling channel. The cooling channel structure of FIG. 4 (b) shows the lowest ratio of 16.27% in the first cooling channel, and the highest ratio of 17.46% in the sixth cooling channel.

As a result, in the cooling flow path structure of FIG. 4 (a), the flow rate variation between flow channel channels is 9.03%, and in the cooling flow path structure of FIG. The cooling uniformity of the flow path structure is formed high, indicating that high efficiency cooling is possible.

6 shows a cooling structure of an integrated power conversion apparatus for an electric vehicle according to the present invention, the integrated power conversion apparatus for an electric vehicle includes an on-board charger 30 and an on-board charger 30 having a heating element. And a second cooling plate 400 disposed between the DC converter 20 and the on-board charger 30 and the DC converter 20 described above. It is assembled to be in contact with each other.

It is coupled to the lower portion of the integrated power converter housing 50 and the integrated power converter housing 50 for accommodating the DC converter 20, the on-board charger 30 and the second cooling plate 400 therein, Integrated power converter case 51 is provided to support any one of the converter 20 or the on-board charger 30, the integrated power converter cover disposed to cover the upper portion of the integrated power converter housing 50 It consists of 52.

As a result, the second cooling plate 400 cools the on-board charger 30 and the DC converter 20, which are heating elements 40 disposed in contact with either one of the upper part and the lower part of the second cooling plate 400. Indicates.

In addition, the second cooling water flow unit 430, which will be described later, of the second cooling plate 400 is disposed adjacent to the heating element provided in the heating element 40, and the protruding cooling unit formed in the second cooling water flow unit 430. Cooling water flows through 330, and the heating element and the second cooling water flow part 430 may be in contact with each other to exchange heat, thereby efficiently cooling the heating element.

Figure 7 is a second embodiment showing the configuration of the cooling channel structure of the present invention, Figure 8 is a perspective view showing the configuration of a cooling plate according to a second embodiment of the present invention, Figure 9 is a second embodiment of the present invention 10 is a detailed view showing the configuration of the lower plate of the cooling plate according to the present invention, and FIG. 10 is a detailed view showing the configuration of the upper plate of the cooling plate according to the second embodiment of the present invention, and FIG. 11 is according to a second embodiment of the present invention. It is a perspective view which shows the assembly structure of a cooling plate.

Referring to Figures 7 to 11, Figure 7 shows another embodiment of the structure of the cooling channel according to the present invention, the expansion channel 310 and the dynamic pressure control channel 320 is applied to the cooling channel, additionally the DC converter The cooling flow channel protrudes downwardly or upwardly so that the cooling flow channel is positioned between the main heating elements of the heating element 40 with respect to the heating element 40 having the heating element such as the 20 and the mounted charger 30. The protrusion cooling part 330 formed is shown.

The protrusion cooling unit 330 may protrude to one side according to the position of the main heating element to the lower side or the upper side, and may protrude to both sides according to the position of the main heating element to the lower side and the upper side.

Therefore, the protruding cooling unit 330 protrudes in at least one of the upper side and the lower side according to the position of the heating element configured in the heating element, and is formed in the second cooling water flow unit 430 to be described later, and the second cooling water flow unit ( 430 may be in contact with the heat generating element to heat exchange to minimize the temperature deviation according to the position of the internal elements of the integrated power converter.

In addition, the protruding cooling unit 330 is formed at the inlet side of the cooling channel so that the flow rate supplied to the cooling channel is uniformly distributed so that no cooling deviation occurs depending on the position of the heating element through the protruding cooling unit 330. Maximize cooling efficiency.

8 illustrates a cooling plate in which a cooling channel structure is formed so that the cooling channel structure disclosed in FIG. 7 may be applied to an integrated power converter.

The second cooling plate 400 includes a second cooling plate lower plate 410 and a second cooling plate upper plate 440 in which a cooling flow path structure can be formed.

In FIG. 9, a detailed configuration of the second cooling plate lower plate 410 is shown, FIG. 9 (a) shows a perspective view of the lower plate of the second cooling plate, and FIG. 9 (b) shows a plan view of the lower plate of the second cooling plate, and FIG. 9 (c) shows a front view of the lower plate of the second cooling plate, and FIG. 9 (d) shows a side view of the lower plate of the second cooling plate.

The second cooling plate lower plate 410 is formed with a coolant flow part 420 in which an empty space is formed to allow the coolant to flow, and cools the coolant to guide the coolant to each coolant channel so that the coolant can flow along each channel. The flow path guide part 422 is formed, and the step part 421 is formed in the fixed height so that a cooling water may be moved by a fixed flow volume.

In addition, the inlet side connecting portion 411 and the outlet side connecting portion 412 connected to the cooling channel inlet 301 and the cooling channel outlet 302 are provided, and the inlet side connecting portion 411 connected to the cooling channel inlet has a flow rate and A sensor (not shown) capable of measuring the flow rate may be provided.

In addition, when the protrusion cooling unit 330 is formed in the cooling flow path structure, the second cooling water flow unit 430 may be provided to allow the cooling water to flow in the protrusion cooling unit 330.

10 shows a detailed configuration of the second cooling plate upper plate 440, FIG. 10 (a) shows a perspective view of the second cooling plate upper plate, and FIG. 10 (b) shows a plan view of the second cooling plate upper plate, and FIG. 10 (c) shows a front view of the second cooling plate top plate, and FIG. 10 (d) shows a side view of the second cooling plate top plate.

The second cooling plate upper plate 440 may be coupled by stacking the stepped portion 421 of the second cooling plate lower plate 410 from above.

The second cooling plate upper plate 440 is formed with a third cooling water flow portion 450 so that the cooling flow path structure is formed therein when combined with the second cooling plate lower plate 410 to allow the cooling water to flow. It shows that the cooling flow path guide portion 451 is formed to guide the cooling water to each cooling flow channel to flow along the channel.

In addition, when the cooling channel structure has the protruding cooling unit 330, the protruding cooling unit 330 is formed in the second cooling water flow unit 430 of the lower plate 410, and the second cooling water flow unit 430 is formed. ) Shows that the protruding cooling separator 460 is coupled to each other so that the coolant can flow in each channel.

The protruding cooling separator 460 is composed of a protruding cooling fluid plate 461 and a flow path guide plate 462, and the flow path guide plate 462 is formed so that the protruding cooling part 330 is formed in each cooling flow channel. The cooling water flow unit 430 is separated at regular intervals, guides the cooling water to flow in each channel, and the protruding cooling flow plate 461 indicates that the flow rate of the cooling water is uniformly distributed.

In addition, the flow path guide plate 462 of the protruding cooling separator 460 is formed between the n-th cooling channel and the (n + 1) -th cooling channel so as to guide the flow path. The protruding cooling flow plates 461 and 463 are formed on the other side.

Therefore, as shown in FIG. 11, the upper portion of the cooling plate lower plate 410 is coupled in a form in which the cooling plate upper plate 440 is covered, and the cooling flow path structure 300 is formed to allow the cooling water to flow therein at the time of coupling.

The cooling plate upper plate 440 and the cooling plate lower plate 410 are superimposed on one another, and can be combined with each other by fastening means such as bolts for easy coupling, and can be finished with a sealant to prevent cooling water from flowing out. And, the cooling passage structure 300 is formed therein to indicate that the cooling water can flow.

In addition, the cooling plate lower plate 410 and the cooling plate upper plate 440 are not coupled to each other, but the cooling plate lower plate 410 and the cooling plate upper plate 440 without fastening means such as bolts and finishing treatments such as sealants. It can be formed in one piece.

The present invention can be applied to the cooling structure of the integrated power converter for an electric vehicle by various modifications by those of ordinary skill in the art, the technical scope of the technology easily deformed to be recognized as belonging to the scope of the patent You will have to.

1: Cooling passage structure 10: Flow loss region
11, 111, 311: first channel 12, 112, 312: second channel
20: Low Voltage DC-DC Converter (LDC)
30: On Board Charger (OBC)
40: heating element 50: integrated power converter housing
51: integrated power converter case 52: integrated power converter cover
100: first cooling channel structure 101, 301: cooling channel inlet
101a, 301a, 411a: inlet side 102a, 302a, 412a: outlet side
102, 302: cooling flow path outlet 110: first expansion flow path
120: first dynamic pressure control channel 150: first cooling plate
300: second cooling channel structure 310: second extended flow path
320: second dynamic pressure control channel 330: protrusion cooling unit
400: second cooling plate 410: lower second cooling plate
411: inlet side connecting portion 412: outlet side connecting portion
420: first cooling water flow portion 421: stepped portion
422: flow path guide portion 430: second coolant flow portion
440: second cooling plate upper plate 450: third cooling water flow portion
451: flow path guide portion 460: protruding cooling separator
461: protrusion cooling fluid plate 462: flow guide plate
463: protrusion cooling fluid plate n: n-th channel

Claims (8)

In the cooling structure is provided in the integrated power converter to form an integrated power converter and a cooling plate for cooling the heating element, the cooling flow path structure for controlling the cooling water flow inside the cooling plate,
The cooling passage structure is,
A cooling flow path inlet of the cooling water to supply the cooling water into the cooling plate;
A cooling flow passage outlet disposed in parallel with the cooling flow passage inlet and discharging the cooling water;
A cooling flow channel configured to communicate with the cooling flow passage inlet and the cooling flow passage outlet, the cooling flow passage channels being plural and arranged in parallel to each other;
An expandable flow path formed in the first channel of the inlet side to distribute a uniform flow rate to the cooling flow channel; And
A vertical pressure control channel disposed on the outlet side of the cooling flow channel so as to distribute a uniform flow rate to the cooling flow channel, and having a dynamic pressure control channel communicating with each cooling flow channel;
The cooling plate formed with the cooling flow path structure is a cooling structure of the integrated power converter for an electric vehicle, characterized in that for cooling the heating element disposed in at least one of the upper and lower.
The method according to claim 1,
The dynamic pressure control channel has a narrower flow path than the cooling flow channel so as to allow dynamic pressure control so that a uniform flow rate is distributed to each cooling flow channel.
The method according to claim 1,
Cooling structure of the electric power conversion device for an electric vehicle comprising a protruding cooling unit is formed in the heat generating element so that the plurality of cooling flow channel channels are located between the heat generating elements that generate heat to protrude through the cooling flow channel.
The method according to claim 3,
The protrusion cooling unit,
Cooling structure of the electric power conversion device for an electric vehicle, characterized in that is formed to protrude in at least one direction of the upper side and the lower side in accordance with the position of the heating element configured in the heating element.
A charger mounted on a heating element having a heating element;
A direct current conversion device which is disposed above or below the mounted charger and is a heating element having a heating element;
It comprises a cooling plate disposed between the mounted charger and the direct current converter,
The cooling plate,
A cooling plate lower plate having a cooling water flow portion formed therein and having a flow path guide portion for allowing the cooling water to flow into each cooling flow channel;
A cooling plate upper plate having a cooling water flow unit formed therein and having a flow path guide unit to form a cooling passage structure therein when combined with the cooling plate lower plate;
It is provided on the lower plate, and includes an inlet side connection portion and an outlet side connection portion connected to the cooling flow path inlet and the cooling flow path outlet;
Cooling the heating elements disposed on at least one of an upper portion and a lower portion of the cooling plate;
When the protruding cooling unit is formed on the lower plate of the cooling plate, a cooling water flow unit is provided to allow the cooling water to flow in the protruding cooling unit;
Cooling structure of the integrated power converter for an electric vehicle, characterized in that the cooling plate upper plate is provided with a protruding cooling separator to form a protruding cooling unit when combined with the lower plate of the cooling plate.
delete The method according to claim 5,
A mounted charger disposed in contact with any one of an upper part and a lower part of the cooling plate;
A direct current converter disposed in contact with one of the upper and lower portions of the cooling plate;
The mounted charger and the direct current converter is assembled to share a cooling plate with each other,
An integrated power converter housing accommodating the mounted charger, the DC converter, and the cooling plate therein;
An integrated power converter case disposed under the integrated power converter housing and supporting either the on-board charger or the direct current converter;
Cooling structure of the integrated power converter for an electric vehicle comprising an integrated power converter cover disposed to cover the upper portion of the integrated power converter housing.
The method according to claim 5,
The protruding cooling separator,
A protruding cooling fluid plate and a flow path guide plate;
The flow guide plate separates the cooling water flow section at regular intervals such that the protruding cooling sections are formed in each cooling flow channel, and guides the cooling water to flow in each channel;
The protruding cooling flow plate, the cooling structure of the integrated power converter for an electric vehicle, characterized in that the flow rate of the cooling water is formed to be uniformly distributed.

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