WO2016068380A1

WO2016068380A1 - Ldc integrated junction box

Info

Publication number: WO2016068380A1
Application number: PCT/KR2014/011236
Authority: WO
Inventors: 임태재; 윤동현; 김효진
Original assignee: 영화테크(주)
Priority date: 2014-10-31
Filing date: 2014-11-21
Publication date: 2016-05-06
Also published as: KR101591921B1; CN107074168B; CN107074168A

Abstract

The present invention relates to an LDC integrated junction box used in a hybrid automobile or an electric automobile, and the purpose of the present invention is to reduce the installation space within an engine room, lower the number of components so as to lower manufacturing costs, and shorten assembly time so as to improve productivity, by integrating, in one module, an LDC that converts a high voltage power to a low voltage power and a junction box that distributes power to various modules of an automobile. To this end, the present invention comprises: an LDC module (20) for converting power supplied from a high voltage battery of a hybrid automobile or an electric automobile to a low voltage; a junction box module (10) for distributing power to each electric device module of the automobile and preventing breakage of the modules caused by overcurrent; a jump busbar (35) for directly electrically connecting the LDC module (20) and the junction box module (10) so as to deliver the power converted to low voltage by the LDC module (20) to the junction box module (10); and a common frame (30) for simultaneously accommodating the LDC module (20) and the junction box module (10).

Description

LDC Integrated Junction Box

The present invention provides an LDC for converting high voltage power supplied from a driving battery of a hybrid vehicle or an electric vehicle into low voltage power used in various modules of a vehicle, and a junction box for distributing power to various modules of a vehicle. By reducing the number of wires and terminals for connecting the LDC and junction box, reducing costs, reducing assembly labor, improving productivity, minimizing package space in confined spaces, The present invention relates to an LDC integrated junction box that can easily dissipate heat.

The junction box refers to an apparatus for distributing power to a plurality of electric device modules installed in an engine room and a vehicle interior of a vehicle.

Although there are some differences depending on the size of the vehicle, the vehicle is provided with approximately 20 to 40 relays and a dozen fuses. The distribution of these relays and fuses becomes complicated and difficult to control.

Accordingly, junction boxes are used to integrate printed circuit boards (PCBs) in one place and to distribute power to electric device modules.

On the other hand, a hybrid vehicle is mainly used a combination of an internal combustion engine engine and an electric motor, the electric motor is driven by a power source from a high voltage battery.

The above-mentioned hybrid vehicle maximizes the efficiency of driving a vehicle by appropriately using an internal combustion engine engine and an electric motor in accordance with the speed or the driving state of the vehicle.

In addition, since electric vehicles drive the vehicle only by an electric motor without using a normal internal combustion engine engine, a high voltage electric motor is used.

Accordingly, a hybrid vehicle or an electric vehicle includes a low-side DC / DC converter (LDC) to convert power supplied from the high voltage battery into low voltage used in various electric device modules.

The LDC performs a function of converting a high voltage (for example, 180V) power generated from a high voltage battery of a hybrid vehicle or an electric vehicle into a voltage of 12V used in various electric device modules provided in the vehicle.

By the way, the conventional junction box and the LDC are installed in the engine room individually because their functions are different.

That is, as shown in FIG. 1, the conventional junction box 50 and the LDC 60 are each manufactured as separate devices and separately mounted in the engine room, and the junction box 50 and the LDC 60 are wired. Or indirectly through a terminal, etc.

When the junction box 50 and the LDC 60 are separately installed as in the related art, there is a problem that the package space in the engine room, which is a limited space, increases.

In addition, since the conventional method requires a wire and a terminal for electrically connecting the junction box 50 and the LDC 60, there is a problem in that the manufacturing cost is increased and the labor is increased, thereby decreasing productivity.

In addition, the conventional junction box has a problem that it is difficult to efficiently discharge the heat generated therein.

[Patent Documents]

(Patent Document 1) KR 10-2005-0082584 A

(Patent Document 2) KR 10-2009-0064778 A

(Patent Document 3) KR 10-2011-0105589 A

The present invention proposes to solve the above-mentioned problems of the prior art, by combining the LDC as a power converter and the junction box as a power distribution unit in one module, reducing the installation space in the engine room, The purpose is to reduce the number of parts by reducing the cost.

Another object of the present invention is to integrate the LDC and the junction box to assemble into a single module to shorten the assembly time to improve productivity.

Still another object of the present invention is to quickly release heat generated from the LDC or junction box, and to supply a stable power supply to prevent malfunction.

Still another object of the present invention is to integrate and maintain the LDC and junction box while maintaining each component easily.

In order to achieve the above object, the present invention includes an LDC module for converting power supplied from a high voltage battery of a hybrid vehicle or an electric vehicle to a low voltage; A junction box module for distributing power to each electric device module of the vehicle and preventing damage to the module due to overcurrent; A jump busbar electrically connecting the LDC module and the junction box module to transfer the power transformed to the low voltage from the LDC module to the junction box module; And a common frame accommodating the LDC module and the junction box module at the same time.

In addition, the LDC module is mounted inside one side of the common frame and the LDC PCB having an electronic circuit for converting a high voltage supplied from a high voltage battery to a low voltage, and coupled to the upper surface of one side of the common frame to protect the LDC PCB And an LDC cover and a power input unit provided in the common frame to supply a high voltage to the LDC PCB.

In addition, the junction box module is mounted inside the other side of the common frame, the electronic circuit for power distribution to each module is provided with a junction box PCB, a plurality of electronic components are mounted on the upper side of the junction box PCB An upper housing provided, a lower housing provided below the junction box PCB and coupled to the upper housing, a bracket provided below the lower housing, and the common frame. It is coupled to the other side is characterized in that it comprises a junction box cover for protecting the electronic components of the junction box PCB and the upper housing.

The common frame may include an LDC accommodating part accommodating an LDC and a junction box accommodating part accommodating a junction box.

In addition, the common frame is characterized in that formed of an integral aluminum material.

In addition, the junction box PCB is bolted to the common frame of the aluminum material is characterized in that to dissipate heat inside.

In addition, the electronic device is bolted to the common frame of the aluminum material, characterized in that to dissipate heat.

In addition, the LDC accommodating portion and the junction box accommodating portion of the common frame are each manufactured, characterized in that assembled together.

In addition, the LDC receiving portion of the common frame is made of an aluminum material, the junction box receiving portion is characterized in that the plastic material.

In addition, the junction box PCB is characterized in that arranged in more than two stages.

The junction box module may further include a prefuse for protecting each electric module from an overcurrent.

The common frame may further include a heat sink or a cooling device capable of performing a cooling function.

In addition, the LDC cover and the junction box cover is manufactured separately and characterized in that mounted on top of the common frame, respectively.

According to the LDC integrated junction box according to the present invention, since the LDC and the power distribution device junction box is integrated into one module, the installation space can be minimized in the engine room, which is a limited space.

In addition, when connecting the LDC and junction box, the LDC and junction box are directly connected through the jump busbar provided inside the junction box without using wires and terminals, thereby reducing the number of parts and reducing the weight. In this way, it is possible to improve productivity by reducing assembly labor.

In addition, since the LDC and the junction box are installed in one common frame to share the mounting work, the junction box can be easily installed and the installation process is simplified.

In addition, since the common frame is formed of aluminum material there is an effect that can quickly release the heat generated from the inside.

In particular, by installing a heat sink in the common frame or by installing a cooling device to improve the heat dissipation effect, it is possible to prevent malfunction due to heat generation, it is possible to supply power stably.

In addition, the LDC cover and junction box cover is mounted independently while assembling and assembling the LDC and junction box, thereby improving the convenience of maintenance.

1 is a reference diagram showing a conventional junction box and LDC.

Figure 2 is a block diagram of the LDC integrated junction box according to the present invention.

Figure 3 is an exploded perspective view of the LDC integrated junction box according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. 2 and 3.

The LDC integrated junction box according to the present invention includes an LDC module 20 for converting power supplied from a high voltage battery of a hybrid vehicle or an electric vehicle into a low voltage; A junction box module 10 for distributing power to each electric device module of the vehicle and preventing damage to the module due to overcurrent; A jump busbar electrically connecting the LDC module 20 and the junction box module 10 directly to the junction box module 10 to transfer power transformed to the low voltage from the LDC module 20 to the junction box module 10. 35); And a common frame 30 that simultaneously accommodates the LDC module 20 and the junction box module 10.

The jump bus bar 35 inside the LDC module 20 converts a high voltage (for example, 180V) input through the power input unit 22 into a low voltage of 12V and directly transfers it to the junction box 10.

The junction box 10 distributes the power of 12V to each electric module in the vehicle through a connector or a wire harness connected thereto.

According to the present invention, since it is not necessary to provide a wire and a terminal to electrically connect the LDC 20 and the junction box 10 as in the prior art, it is possible to reduce the number of parts to reduce the manufacturing cost and weight, assembly process Can shorten the productivity.

In addition, as shown in FIG. 3, the LDC module 20 is mounted inside one side of the common frame 30 and has an LDC PCB 21 having an electronic circuit for converting a high voltage supplied from a high voltage battery into a low voltage. And an LDC cover 23 coupled to an upper surface of one side of the common frame 30 to protect the LDC PCB 21, and provided to the common frame 30 to supply a high voltage to the LDC PCB 21. It comprises a power input unit 22.

In addition, the junction box module 10 is mounted inside the other side of the common frame 30, the junction box PCB (11) having an electronic circuit for power distribution to each module and a plurality of electronic components ( 13 is mounted, the upper housing (Upper housing) 12 provided on the upper side of the junction box PCB (11), the row provided on the lower side of the junction box PCB (11) and coupled to the upper housing 12 A lower housing 16, a bracket 17 provided at a lower portion of the lower housing 16, and an upper portion of the common frame 30, the upper side of the junction box PCB 11 and upper And a junction box cover 14 that protects the electronic component 13 of the housing 12.

As shown in FIG. 3, the common frame 30 includes an LDC accommodating part 30a accommodating an LDC and a junction box accommodating part 30b accommodating a junction box.

That is, since the LDC 20 and the junction box 10 are both mounted in one common frame 30, the package space can be minimized in the engine room of the limited space.

The common frame 30 is preferably formed of an integral aluminum material, but is not limited thereto.

When the common frame 30 is formed of an aluminum material, the junction box PCB 11 is preferably coupled to the common frame 30 of the aluminum material with a bolt (not shown). According to the above structure, heat generated in the junction box can be efficiently discharged.

In addition, the electronic device such as IPS is also preferably coupled to the aluminum common frame 30 with a bolt to dissipate heat.

Meanwhile, the LDC accommodating part 30a and the junction box accommodating part 30b of the common frame 30 may be separately manufactured and then coupled to each other.

In this case, the LDC receiving portion 30a of the common frame 30 is preferably made of aluminum, and the junction box receiving portion 30b is preferably made of plastic.

Since the junction box receiving portion 30b accommodates the junction box 10 through which a low voltage of 12V flows, the junction box accommodation portion 30b may be formed of plastic instead of aluminum.

According to the above structure, since the use of aluminum material is reduced, the manufacturing cost of the common frame 30 can be reduced.

In addition, the junction box PCB 11 is preferably arranged in more than one stage. In this case, the size of the junction box PCB 11 can be reduced.

In addition, the junction box module 10 may further include a prefuse 15 for protecting each electric module from an overcurrent.

In addition, the common frame 30 may further include a heat sink (not shown) capable of performing a cooling function, or a cooling device such as a cooling fan (not shown) may be further provided.

According to the above structure, it is possible to quickly release the heat generated in the junction box to prevent malfunction and to supply the power stably.

In addition, the LDC cover 23 and the junction box cover 14 are each manufactured separately and then mounted on the upper part of the common frame 30, respectively.

Accordingly, the LDC 20 and the junction box 10 may be integrated and configured, but the LDC 20 and the junction box 10 may be individually maintained.

In the LDC integrated junction box of the present invention configured as described above, the junction box module and the LDC module are integrated into one module using a common frame, and a low voltage power supply is directly connected to the junction box through a jump bus bar provided inside the junction box. To pass.

As a result, installation space can be minimized in a limited space of the engine room, and wires and terminal parts can be reduced, thereby reducing manufacturing cost and weight.

In addition, the common frame made of aluminum can efficiently dissipate heat generated inside the junction box, supply stable power, and use a high voltage electronic relay.

As mentioned above, the preferred embodiment of the present invention has been described as an example, and the present invention is not limited to the above-described embodiment. Those skilled in the art will appreciate that various changes and modifications can be made without departing from the scope of the technical idea described in the claims.

Claims

An LDC module 20 for converting power supplied from a high voltage battery of a hybrid vehicle or an electric vehicle to a low voltage;

A junction box module 10 for distributing power to each electric device module of the vehicle and preventing damage to the module due to overcurrent;

A jump busbar electrically connecting the LDC module 20 and the junction box module 10 directly to the junction box module 10 to transfer power transformed to the low voltage from the LDC module 20 to the junction box module 10. 35);

LDC integrated junction box, comprising: a common frame (30) for receiving the LDC module 20 and the junction box module (10) at the same time.
The method of claim 1,

The LDC module 20,

An LDC PCB 21 mounted inside one side of the common frame 30 and provided with an electronic circuit for converting a high voltage supplied from a high voltage battery into a low voltage;

An LDC cover 23 coupled to an upper surface of one side of the common frame 30 to protect the LDC PCB 21;

LDC integrated junction box, characterized in that it comprises a power input unit 22 is provided in the common frame 30 to supply a high voltage to the LDC PCB (21).
The method of claim 1,

The junction box module 10,

A junction box PCB 11 mounted inside the other side of the common frame 30 and having an electronic circuit for distributing power to each module;

An upper housing 12 mounted with a plurality of electronic components 13 and provided on an upper side of the junction box PCB 11;

A lower housing 16 provided below the junction box PCB 11 and coupled to the upper housing 12;

A bracket 17 provided below the lower housing 16;

An LDC integrated junction comprising a junction box cover 14 coupled to an upper portion of the common frame 30 to protect the electronic component 13 of the junction box PCB 11 and the upper housing 12. box.
The method of claim 1,

The common frame (30), LDC integrated junction box, characterized in that it comprises an LDC receiving portion (30a) for receiving the LDC and a junction box receiving portion (30b) for receiving the junction box.
The method of claim 4, wherein

The common frame 30 is LDC integrated junction box, characterized in that formed of an integral aluminum material.
The method of claim 5,

Junction box PCB (11) LDC integrated junction box, characterized in that the bolt is coupled to the aluminum common frame 30 to dissipate heat.
The method of claim 5,

LDC integrated junction box, characterized in that the electronic device is bolted to the common frame 30 of the aluminum material to dissipate heat.
The method of claim 4, wherein

The LDC receiver 30a and the junction box receiver 30b of the common frame 30 are each manufactured separately and then coupled to each other.
The method of claim 8,

LDC receiving portion (30a) of the common frame 30 is made of aluminum material, junction box receiving portion (30b) LDC integrated junction box, characterized in that made of plastic material.
The method of claim 3,

The junction box PCB (11) LDC integrated junction box, characterized in that arranged in more than one stage.
The method of claim 1,

The junction box module (10), LDC integrated junction box further comprises a pre-fuse (Prefuse) (15) for protecting each electrical module from overcurrent.
The method of claim 1,

The common frame (30), LDC integrated junction box, characterized in that the heat sink (Heat Sink) that is further provided to perform a cooling function.
The method of claim 1,

The common frame (30), LDC integrated junction box, characterized in that the cooling device is further provided.
The method of claim 1,

The LDC cover (23) and junction box cover (14), LDC integrated junction box, characterized in that the separately manufactured is mounted on the upper portion of the common frame (30).