WO2013141577A1

WO2013141577A1 - Propulsion control apparatus for electric vehicle

Info

Publication number: WO2013141577A1
Application number: PCT/KR2013/002248
Authority: WO
Inventors: 정병환
Original assignee: 주식회사 효성
Priority date: 2012-03-19
Filing date: 2013-03-19
Publication date: 2013-09-26
Also published as: KR20130106240A; KR101346393B1

Abstract

The present invention relates to a propulsion control apparatus for an electric vehicle, and more particularly, to a propulsion control apparatus for an electric vehicle, in which a cooling flow channel is formed in a lower surface of the propulsion control apparatus such that a coolant may directly contact a power module to cool the power module. To this end, the propulsion control apparatus for an electric vehicle according to the present invention comprises: a power module for converting direct current into alternating current; a casing having a predetermined cooling flow channel for the flow of coolant formed in a lower surface of the power module; and a smoothing capacitor module accommodated in a rear end of the casing. Thus, heat generated from the propulsion control apparatus for an electric vehicle can be effectively discharged to the outside so as to prevent the propulsion control apparatus from being heated, thus preventing performance degradation and reduction of life of the propulsion control apparatus.

Description

Electric vehicle propulsion control device

The present invention relates to a propulsion control device for an electric vehicle, and more particularly, has a cooling passage formed in a predetermined groove on a lower surface of the propulsion control device so that the coolant flowing through the bottom surface of the power module directly contacts and cools the power module. The present invention relates to an electric vehicle propulsion control device capable of improving heat dissipation performance and cooling efficiency by efficiently placing a rectangular parallelepiped smoothing capacitor on the rear and left and right sides of the case and efficiently using the internal space of the propulsion control device.

An electric vehicle using an engine and a motor has a concept of using power from a motor having a relatively low torque characteristic as a driving force at a low speed and driving the vehicle with power from an engine having a relatively high torque characteristic at a high speed. To improve the fuel economy of vehicles.

In addition, while the electric vehicle is driven only by the motor, there is no room for exhaust gas generated by the engine, and thus it is recognized as an eco-friendly automobile technology having the advantages of fuel efficiency improvement and exhaust gas reduction.

Such an electric vehicle requires a propulsion control device for converting a direct current power source of a fuel cell into an alternating current power in order to control a high output motor for driving an electric vehicle. However, the electric vehicle is driven by a drive motor constituting the drive system by electric power supplied from a drive battery corresponding to a power source, and transmits power to the wheels. The drive system composed of a drive motor and a propulsion control device controlling the drive motor Due to the structural characteristics and operating characteristics, high temperatures are involved during operation, so the cooling system is operated to remove such high temperatures.

In particular, a cooling method for cooling a propulsion control device for a conventional electric vehicle includes a smoothing capacitor, which is a main component that generates heat in a propulsion control device, and a heat generated by an insulated gate bipolar transistor (IGBT) power module for high-speed switching. To this end, heat sinks were attached or coolant flowed around the propulsion controls for electric vehicles.

However, such a conventional electric vehicle propulsion control device causes an increase in the cost of the heat sink and the size of the propulsion control device due to the heat sink and inefficiency of the work due to the attachment of the heat sinker when the heat sink is attached to the heating element.

In addition, when the cooling water flows to the propulsion control device for an electric vehicle, since the smoothing capacitor and the power module, which are the main causes of heat generation, are not directly cooled in the propulsion control device, the cooling efficiency is lowered and the deterioration of the corresponding parts cannot be prevented. Also occurred.

Therefore, there is a need for a method that can directly cool the heating element without additional costs in order to effectively discharge the heat generated from the electric vehicle propulsion control device.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention, by arranging the heating elements of the electric vehicle propulsion control device easily heat dissipation, while cooling the heating element by using the coolant directly In order to effectively discharge heat generated from the propulsion control device for electric vehicles, and to provide efficient electric vehicle propulsion control devices for miniaturization and shock absorption by efficiently disposing the internal components of the propulsion control device.

To this end, the electric vehicle propulsion control device according to the present invention includes a power module for converting direct current into alternating current, a case having a predetermined cooling flow path through which cooling water flows on a lower surface of the power module, and a smoothing capacitor housed in the rear end of the case. Contains modules

The cooling passage is formed to be narrower than the area of the lower surface of the power module to prevent the inflow of cooling water.

The case further includes a cover on the top surface.

It further includes a control board for controlling the power module, and a power board for supplying power to the control board.

A bracket is further provided on an upper surface of the control board to shield electrical noise of the power board.

The capacitor module is installed to be fixedly received in close contact with the rear and left and right sides of the case.

The case has a DC hole in which an external DC terminal is fastened to an input of the power module, and an AC hole in which an external AC terminal is fastened to an output of the power module.

The AC terminal is electrically connected to the power module via a bus bar.

According to an embodiment of the present invention, there is an effect of effectively externally dissipating heat generated from the smoothing capacitor module and the power module of the electric vehicle propulsion control device.

In addition, according to an embodiment of the present invention, due to the efficient arrangement of the components constituting the electric vehicle propulsion control device has an effect that can be reduced in size by miniaturizing the electric vehicle propulsion control device.

In particular, according to an embodiment of the present invention, the rectangular parallelepiped smoothing capacitor module is fixed in close contact with the rear and left and right sides of the case, thereby improving heat dissipation efficiency to the outside and excellent seismic characteristics.

Therefore, according to the present invention, by effectively dissipating heat generated from the electric vehicle propulsion control device effectively prevents the deterioration of the propulsion control device, thereby reducing the performance and life of the propulsion control device.

1 is a perspective view for showing an example of an electric vehicle propulsion control device according to an embodiment of the present invention.

Figure 2 is a plan view for showing a cooling passage provided in a predetermined groove shape on the bottom surface of the case according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the electric vehicle propulsion control device according to an embodiment of the present invention.

The same reference numerals are used for the same members in FIGS. 1 and 2.

The basic principle of the present invention is to securely store the smooth capacitor module in close contact with the case on the rear of the propulsion control case for the electric vehicle, and to form a predetermined cooling passage on the bottom surface of the case, the coolant flows while directly contacting the bottom of the power module It is to effectively discharge the heat generated by the propulsion control device to the outside.

In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a perspective view for showing an electric vehicle propulsion control device according to an embodiment of the present invention, for example.

Referring to FIG. 1, an electric vehicle propulsion control apparatus 100 according to an embodiment of the present invention includes a cover 120 covering a top surface of a case 110, a power board 130, and a bottom surface of a power board 130. Bracket (a) is provided, the smoothing capacitor module 140, the control board 150 for the control of the power module 160, the power module for converting direct current into alternating current (160), power module DC terminal 170 connected to the input of 160, and the output of the power module 160 and the AC terminal 180 is connected via three bus-bar (b) (b).

Referring to the operation and structure of the electric vehicle propulsion control device 100 according to an embodiment of the present invention configured as shown in Figure 1 in detail as follows.

The electric vehicle propulsion control device 100 includes a case 110 for integrating or integrating component parts. The case 110 is sealed by the cover 120 to protect each component that is laminated and fixed to the case 110 from the outside.

The case 110 and the cover 120 may be made of a metal of aluminum or aluminum alloy, but is not limited thereto.

The power board 130 is located under the cover 120. A bus bar (c) is provided at a rear end of the power board 130 to be electrically connected to the smoothing capacitor module 140.

Here, the smoothing capacitor module 140 is tightly received and fixed to the rear and left and right sides of the inside of the case 110 in order to easily discharge the generated heat to the outside. That is, the smooth capacitor module 140 is formed in a rectangular parallelepiped shape, and heat generated easily is electrically conductively fixed to the rear and left and right sides of the case 110 made of an aluminum metal. Therefore, heat generated in the smoothing capacitor module 140 may be easily released to the outside of the propulsion control device 100. In addition, since the rectangular parallelepiped smoothing capacitor module 140 is closely fixed to the rear surface and the left and right sides of the case 110, the arrangement of other components may be easily performed.

Meanwhile, a bracket (a) is provided below the power board 130 to fix the power board 130. In addition, the bracket (a) also serves as a shield (Shield) for shielding the electric wave interference of the control board 150 and the power board 130 for controlling the alternating current output from the power module 160.

Below the control board 150 is a power module 160 that performs a high speed switching operation to convert the input DC power to the output AC power.

An external DC terminal 170 for inputting DC power and an external AC terminal 180 for outputting AC power are fastened to an input terminal of the power module 160.

Here, the AC terminal 180 is electrically connected to the power module 160 by the three bus bars (b).

In addition, the case 110 includes connection holes (Holes) for electrically connecting each of the external DC terminal 170 and the external AC terminal 180 to the input terminal and the output terminal of the power module 160.

In this case, the DC terminal 170 may generally include two positive (+) DC terminals and a negative (-) DC terminal. Therefore, the case 110 may generate two holes (Hole) for fastening for each DC terminal, or may generate one hole long in the horizontal direction, but is not limited thereto.

Similarly, the AC terminal 180 may be composed of a ground wire and three terminals, but may generate three holes for each terminal, or may generate one hole long in the horizontal direction, but is not limited thereto.

On the other hand, the power module 160 uses an Insulated Gate Bipolar Transistor (IGBT) for high speed switching, which generates a lot of heat due to the high speed switching loss.

This heat, together with the heat generated from the capacitor module 140, serves as the main factor of the heat generated from the propulsion control device (100).

As described above, the capacitor module 140 emits heat generated by being in close contact with the rear and left and right sides of the case. In addition, the case 110 includes a cooling channel 111 formed into a predetermined groove as shown in FIG. 2 to cool the heat generated by the power module 160.

The cooling passage 111 will be described with reference to FIG. 2 below.

2 is a plan view illustrating an example of a cooling channel 111 provided in a predetermined groove shape on a bottom surface of a case 110 according to an embodiment of the present disclosure.

Referring to FIG. 2, the case 110 according to an exemplary embodiment of the present invention has a cooling passage 111 provided in a predetermined groove shape on a bottom surface thereof. The cooling passage 111 is provided with a plurality of screw holes d and the

support bases

111a and 111b to fix and support the power module 160.

The width of the cooling passage 111 is preferably formed so as not to exceed the area of the bottom surface of the power module 160. In order to prevent the coolant flowing in the cooling channel 111 from flowing into the electric vehicle propulsion control device 100, the horizontal length and the vertical length of the cooling channel 111 do not exceed the horizontal and vertical lengths of the power module 160. It is preferable.

This is because, when the coolant flowing in the cooling channel 111 flows into the electric vehicle propulsion control device 100, a short risk with electrical components therein is high.

As such, the electric vehicle propulsion control device 100 according to the present invention can easily discharge heat generated by the high speed switching loss from the power module 160 to the outside because the coolant flows while contacting the lower surface of the power module 160. have.

In addition, the electric vehicle propulsion control device 100 according to the present invention facilitates heat dissipation while efficiently arranging internal components while the smooth capacitor module 140 is fixedly housed in close contact with the rear and left and right sides of the case 110. can do.

On the other hand, in the present embodiment, the shape of the cooling flow path 111 is assumed to be a rectangle, the rectangular cooling flow path 111 is an example, for example, cooling of various shapes such as a net shape, an elliptical shape, a checkerboard shape, etc. Of course, it is also possible to apply a flow path.

As described above, the present invention securely houses the smooth capacitor module 140 in close contact with the rear and left and right sides of the case, and flows coolant to directly contact the lower surface of the power module 160 with the cooling channel 111 of the case 110. By sending the heat generated from the propulsion control device 100 can be effectively released to the outside.

While the above has been shown and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, it is usually in the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

100: propulsion controller 110: case

120: cover 130: power board

140: smoothing capacitor module 150: control board

160: power module and 170: DC terminal

180: AC terminal

Claims

A power module converting direct current into alternating current;

A case having a predetermined cooling flow path that is in contact with a lower surface of the power module to allow the cooling water to flow; And

And a smoothing capacitor module accommodated in the rear end of the case.
The method of claim 1, wherein the cooling passage

Electric vehicle propulsion control device characterized in that formed to be narrower than the area of the lower surface of the power module to prevent the inflow of the cooling water.
The cooling passage of claim 1, wherein the cooling passage is

Electric vehicle propulsion control device, characterized in that formed in the shape of any one of rectangular, square, checkerboard, mesh, oval.
The method of claim 1, wherein the case

Electric vehicle propulsion control device further comprising a cover (Cover) on the top surface.
The method of claim 1,

And a control board for controlling the AC converted by the power module, and a power board for supplying power to the control board.
The method of claim 5,

The electric vehicle propulsion control device further comprising a bracket on the upper surface of the control board to shield the electrical noise of the power board.
The method of claim 1, wherein the capacitor module

The electric vehicle propulsion control device characterized in that the fixed and received in close contact with the rear and left and right sides of the case.
The method of claim 1, wherein the case

A DC hole to which an external DC terminal is fastened to an input of the power module,

And an AC hole to which an external AC terminal is coupled to an output of the power module.
The method of claim 8, wherein the AC terminal

Electric vehicle propulsion control device characterized in that it is electrically connected to the power module through three bus-bars.