KR20190048112A - Relay Apparatus - Google Patents

Abstract

The present invention relates to a relay apparatus. According to the present invention, the relay apparatus comprises: a movable contact piece having at least one movable contact; a main bus bar assembly having at least one fixed contact arranged at a position facing the movable contact; an actuator for providing a driving force to the movable contact piece for a contact between the movable contact and the fixed contact; a connector for providing an electrical connection to the outside; and a diagnosis bus bar for measuring a current of the main bus bar assembly to check the conduction state between the movable contact and the fixed contact.

Description

Relay Apparatus

The present invention relates to a 48V relay for protecting a 48V lithium-ion battery by supplying main electric power of a 48V lithium-ion battery of a mild hybrid vehicle to an electric motor or the like, Relates to a relay device in which a BMS (Battery Management System) can easily monitor the energized state of internal contacts of a relay.

Recently, eco-friendly automobiles such as hybrid cars and electric cars are attracting attention due to energy depletion and environmental pollution problems. Hybrid cars are largely classified as mild hybrid cars and plug-in hybrid cars depending on their charging method. A mild hybrid vehicle is a hybrid vehicle that charges a battery using a part of energy generated from an internal combustion engine. A plug-in hybrid vehicle is a hybrid vehicle that receives energy from an external commercial power source to charge the battery.

The Mild hybrid system is a next-generation vehicle system that reduces fuel consumption and emissions compared to conventional vehicles by applying the internal combustion engine and electric motor to the vehicle. A mild hybrid system that operates at a relatively low voltage (48V) is not only superior in terms of cost, but also has the advantage of driving electric parts using high output power.

Particularly, a relay (hereinafter referred to as a relay device) mounted on a mild hybrid vehicle is a device for protecting the battery by supplying main electric power of a lithium-ion battery to an electric motor or electric parts, Research and development are actively being carried out.

Meanwhile, the BMS (Battery Management System) installed in the battery pack monitors and controls the operation of the relay device at all times. In the conventional BMS, an additional part is attached to the outside of the relay device to confirm whether or not the relay device is energized. However, in this case, it was pointed out that a separate part for confirming the contact energization of the relay device is disposed in the battery pack, which is not suitable for a mild hybrid system requiring compactness by occupying a space.

In addition, the high reliability and extended service life of the relay device are important factors for the product characteristics, and can be realized by the arc extinguishing ability capable of rapidly discharging the heat caused by the arc generated when the relay is opened and closed. Conventionally, a method of increasing an inter-contact distance in order to extinguish an arc has been used. However, this method has a problem in that it is difficult to apply to a mild hybrid system requiring a miniaturization because of a large product size.

Korean Patent No. 10-1241221, " Charging Device for Mild Hybrid Vehicle "

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

It is an object of the present invention to provide a relay device capable of monitoring whether or not a fixed contact and a movable contact are energized by simply inserting a diagnostic bus bar into a relay without additional parts being attached to the outside of the relay.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a relay device having a structure capable of extinguishing an arc generated upon opening and closing between a fixed contact and a movable contact.

Other objects and advantages of the present invention will be described hereinafter and will be understood by the embodiments of the present invention. Further, objects and advantages of the present invention can be realized by the means and the combination shown in the appended claims.

The present invention is embodied by the following embodiments in order to achieve the above object.

A relay device according to one aspect is a relay device mounted on a mild hybrid vehicle, comprising: a movable contact piece having at least one movable contact; A main bus bar assembly having at least one fixed contact disposed at a position opposing the movable contact; An actuator for providing a driving force to the movable contact piece for contact between the movable contact and the fixed contact; And a diagnostic bus bar for measuring the current of the main bus bar assembly and confirming whether the movable contact and the fixed contact are energized.

Wherein the main bus bar assembly includes first and second main bus bars disposed opposite to each other with the actuator interposed therebetween, wherein the first and second main bus bars are arranged such that the at least one fixed contact is disposed And a second face having a second face on which the diagnostic bus bar is fixedly coupled to the first face so as to be perpendicular to the first face, is " a ".

Wherein the diagnostic bus bar comprises first and second diagnostic bus bars disposed opposite each other with the actuator therebetween, the first diagnostic bus bar having one end connected to a second side of the first main busbar And the second diagnostic bus bar is fixedly coupled to a second surface of the second main bus bar at one end thereof to measure a current flowing through the first main bus bar and the second main bus bar, And whether or not electric current is flowing between the fixed contacts.

The actuator includes a bobbin having a hollow inside, a coil wound around the bobbin, and a core swinging by a current flowing in the coil.

The relay device further includes a connector for providing an electrical connection with the outside, the connector including: a first connector terminal connected to the other end of the first diagnostic bus bar; And a second connector terminal connected to the other end of the second diagnostic bus bar to transmit the current measured by the first and second diagnostic bus bars to the outside.

The relay device further includes a pair of side magnet members for extinguishing an arc generated when the movable contact and the fixed contact are opened.

The pair of side magnet members are disposed so as to face each other with a different polarity, and the movable contact and the stationary contact are disposed between the pair of side magnet members.

The present invention has the following effects with the above-described configuration.

According to the present invention, it is possible to monitor whether the fixed contact and the movable contact are energized by simply inserting the diagnostic bus bar into the relay without additional parts being attached to the outside of the relay.

The present invention provides a simple structure capable of extinguishing an arc generated when the movable contact is opened and closed between the fixed contact and the movable contact, thereby providing a high reliability and a life extension effect of the relay as well as miniaturization.

1 is an exploded perspective view showing a main configuration of a relay apparatus according to an embodiment.
Figure 2 is a partial perspective view of Figure 1;
Fig. 3 is a partial sectional view of Fig. 1. Fig.
FIG. 4 is a partial cross-sectional view showing a state in which the fixed contact and the movable contact are brought into contact with each other by energization by driving the actuator in FIG. 2;
5 is a partial cross-sectional view showing a state where the fixed contact and the movable contact are opened to each other according to the embodiment.
6 is a partial cross-sectional view showing a state in which a diagnostic bus-bar is coupled to a main bus-bar according to an embodiment;
7 is a partial cross-sectional view of a connector to which a diagnostic bus-bar is coupled according to an embodiment;
8 is a partial sectional view for explaining the eccentric structure of the driving rod head portion according to the embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This embodiment is provided to more fully describe the present invention to those skilled in the art. Furthermore, although specific terms have been used in the drawings and specification of the present invention, they have been used for the purpose of describing the present invention only and not for limiting the scope of the present invention described in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

In the present specification, the singular forms include plural forms unless otherwise specified in the specification. &Quot; comprises " and / or " comprising " when used in this specification is taken to specify the presence or absence of one or more other components, steps, operations and / Or add-ons.

The relay device of the present invention will now be described in detail with reference to the drawings.

1 is an exploded perspective view showing a main configuration of a relay device according to an embodiment, Fig. 2 is a partial perspective view of Fig. 1, Fig. 3 is a partial sectional view of Fig. 1, Fig. FIG. 5 is a partial cross-sectional view showing a state where the fixed contact and the movable contact are opened to each other according to the embodiment. FIG. 5 is a partial cross-sectional view showing a state where the fixed contact and the movable contact are in contact with each other.

1 to 3, the relay device 1 includes a movable contact piece 200 having at least one movable contact 210a, 210b; A main bus bar assembly (100) having at least one stationary contact (110a, 110b) disposed at a position opposing the movable contacts (210a, 210b); An actuator 300 for providing a driving force to the movable contact piece 200 for contact between the movable contacts 210a and 210b and the fixed contacts 110a and 110b; A connector (500) for providing electrical connection with the outside; Diagnostic bus bars (410, 420) for measuring the current of the main bus bar assembly (100) and confirming whether the movable contacts (210a, 210b) and the fixed contacts (110a, 110b) A cover 600; And a substrate (700).

The main bus bar assembly 100 includes a first main bus bar 110 and a second main bus bar 120 disposed opposite to each other with the actuator 300 interposed therebetween.

The first main bus bar 110 has a first surface 111 on which the at least one stationary contact 110a is disposed and a second surface 111 on which the diagnostic bus bar 410 is fixedly coupled Quot; A " shape having a second surface 112 which is a " second surface " The second main bus bar 120 includes a first surface 121 on which the at least one fixed contact 110b is disposed and a second surface 121 on which the diagnostic bus bar 420 is fixed And the cross-section having the second surface 122 to be joined is configured in an " a " shape.

The actuator 300 includes a bobbin 310 having a hollow therein, a coil 320 wound around the bobbin 310, and a core 330 swung by a current flowing in the coil 320 do. The actuator 300 is actuated to apply a driving force capable of bringing the movable contacts 210a and 210b into contact with the fixed contacts 110a and 110b so as to be energized between the fixed contacts 110a and 110b and the movable contacts 210a and 210b To the contact piece (200).

Referring to FIGS. 1 and 3, the core 330 may include a movable core 331 and a fixed core 332. The core 330 can move the driving rod 340 up and down within the bobbin 310 by electromagnetic interaction with the coil 320. [

A magnetic circuit is formed in the fixed core 332, the movable core 331 and the yoke 350 of the penetrating portion of the bobbin 310 when the current flowing in the coil 320 is turned on, Moves out of the elastic force of the lower spring 370 and approaches the fixed core 332 to thereby raise the driving rod 340. [ The force for raising the driving rod 340 is defined as the driving force of the actuator 300. [ 5, the movable contact piece 200 coupled to the upper end of the driving rod 340 rises together and the movable contacts 210a and 210b disposed on the movable contact piece 200 are coupled to the main bus bar assembly 100 And contact with the fixed contacts 110a and 110b disposed in the first and second fixed contacts 110a and 110b.

Referring to FIG. 4, when the movable contacts 210a and 210b are in contact with the fixed contacts 110a and 110b and are energized, the first main bus bar 110 and the second main bus bar 120, do. That is, when the movable contacts 210a and 210b and the fixed contacts 110a and 110b are energized, current flows to the first main bus bar 110, the movable contact piece 200, and the second main bus bar 120, The device 1 is turned on.

5, when the current flowing through the coil 320 is turned off, the driving force of the actuator 300 is released, and the fixed contacts 110a and 110b are rotated by the restoring force of the upper spring 360 and the lower spring 370, And the movable contacts 210a and 210b are opened.

2, the relay apparatus 1 further includes a pair of side magnet members 230a and 230b. When the current flowing through the coil 320 is turned off, as shown in FIG. 5, the fixed contacts 110a and 110b and the movable contacts 210a and 210b are separated from each other and an arc is generated. A pair of side magnet members 230a and 230b are disposed in the relay apparatus 1 in order to extinguish arc generated when the stationary contacts 110a and 110b and the movable contacts 210a and 210b are opened .

2, the pair of side magnet members 230a and 230b are disposed so as to face each other with a different polarity, and between the pair of side magnet members 230a and 230b, the stationary contacts 110a, 110b and the movable contacts 210a, 210b are preferably arranged in two or more, respectively. According to such a configuration, the arc generated between the fixed contacts 110a and 110b and the movable contacts 210a and 210b is generated by the magnetic force of the magnetic field formed between the pair of side magnet members 230a and 230b, And is deflected in the direction of force according to the law. In addition, when two or more contact points are located between the pair of side magnet members 230a and 230b, the directions of the arcs generated at the contact points are the same, so that there is no polarity of the product.

FIG. 6 is a partial cross-sectional view showing a state where the diagnostic bus-bar is coupled to the main bus-bar according to the embodiment, and FIG. 7 is a partial cross-sectional view of the connector to which the diagnostic bus-

6, the diagnostic bus bars 410 and 420 include a first diagnostic bus bar 410 and a second diagnostic bus bar 420 disposed opposite to each other with the actuator 300 interposed therebetween do. 4 and 6, according to an embodiment, the first diagnostic bus bar 410 and the second diagnostic bus bar 420 are connected to the second main bus bar 110 120b of the movable contacts 210a, 210b and the fixed contacts 110a, 110b by measuring the current flowing through the movable contacts 210a, 210b.

2 and 6, one end of the first diagnostic bus bar 410 is fixedly coupled to the second surface 112 of the first main bus bar 110, and the other end is connected to the connector 500 do. One end of the second diagnostic bus bar 420 is fixedly coupled to the second surface 122 of the second main bus bar 120 and the other end is connected to the connector 500. Each of the first diagnostic bus bar 410 and the second diagnostic bus bar 420 is press-fitted by the emboss formed on the first main bus bar 110 and the second main bus bar 120. The bus-bar assembly is fixed on the substrate 700.

The insertion guide ribs 380 and the press-fit grooves 390 may be formed so that the first main bus bar 110, the second main bus bar 120, and the coil 320 can be press-fit into a predetermined position.

6 and 7, the connector 500 may include four connector terminals 510, 520, 530, and 540 and may be configured to provide interference between the four connector terminals 510, 520, 530, They can be configured to have different lengths to avoid. The connector 500 can facilitate coupling between the board 380, the connector 500, and the cover 600 by forming rails on the body.

The first connector terminal 510 is connected (soldered) to the other end of the first diagnostic bus bar 410 and the second connector terminal 520 is connected (soldered) to the other end of the second main bus bar 120. The first diagnostic bus bar 410 and the second main bus bar 120 are connected to each other through the first connector terminal 510 and the second connector terminal 520 according to the embodiment, The current value flowing from the first main bus bar 110 to the second main bus bar 120 can be monitored.

Referring to FIGS. 1 and 6, a third connector terminal 530 and a fourth connector terminal 540 may apply power to the coil 320.

8 is a partial sectional view for explaining the eccentric structure of the driving rod head portion according to the embodiment.

Referring to FIG. 8, the head portion 340a of the driving rod 340 may have an eccentric structure.

It is possible to maintain the contact pressure between the fixed contacts 110a and 110b and the movable contacts 210a and 210b to increase the stability of power supply and to maintain the contact pressure of a certain level or higher even when the contact is worn by the arc, To lower it, the upper spring 360 applies pressure to the movable contact piece 200.

On the other hand, the degree of wear of the contact may differ depending on the load direction, and as a result, the contact heights may be different from each other. At this time, since the movable contact piece 200 is difficult to keep horizontal due to the contact gap asymmetry that occurs, interference may occur between the movable contact piece 200 and the driving rod 340 in an extreme situation.

8, the head portion 340a of the driving rod 340 may be formed in an eccentric structure to prevent interference between the movable contact piece 200 and the driving rod 340. Referring to FIG.

While the specification contains many features, such features should not be construed as limiting the scope of the invention or the scope of the claims. In addition, the features described in the individual embodiments herein may be combined and implemented in a single embodiment. Conversely, various features described in the singular < Desc / Clms Page number 5 > embodiments herein may be implemented in various embodiments individually or in combination as appropriate.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.

1: Relay device 100: Main bus bar assembly
110, 120: first and second main bus bars 110a, 110b: fixed contacts
200: movable contact piece 210a, 210b: movable contact piece
300: actuator 310: bobbin
320: coil 330: core
331: movable core 332: fixed core
340: driving rod 350: yoke
360: upper spring 370: lower spring
380: substrate 410: 420: first and second diagnostic bus bars
500: connector 510: first connector terminal
520: second connector terminal 530: third connector terminal
540: fourth connector terminal 600: cover

Claims (7)

In the relay device,
A movable contact having at least one movable contact;
A main bus bar assembly having at least one fixed contact disposed at a position opposing the movable contact;
An actuator for providing a driving force to the movable contact piece for contact between the movable contact and the fixed contact;
A diagnostic bus bar measuring a current of the main bus bar assembly and confirming whether current flows between the movable contact and the fixed contact;
And a relay device. The method according to claim 1,
The main bus bar assembly includes:
And first and second main bus bars disposed opposite to each other with the actuator interposed therebetween,
Wherein the first and second main bus bars
Wherein a cross-section having a first surface on which the at least one stationary contact is disposed and a second surface perpendicularly bent to the first surface and to which the diagnostic bus bar is fixedly coupled is in the shape of a letter "A". 3. The method of claim 2,
The diagnostic bus bar
And first and second diagnostic bus bars disposed facing each other with the actuator interposed therebetween,
Wherein one end of the first diagnostic bus bar is fixedly coupled to a second surface of the first main bus bar and one end of the second diagnostic bus bar is fixedly coupled to a second surface of the second main bus bar, The first main bus bar and the second main bus bar to measure whether current flows between the movable contact and the fixed contact. The method of claim 3,
The actuator includes:
A bobbin having a hollow inside, a coil wound around the bobbin, and a core swinging by a current flowing in the coil. 5. The method of claim 4,
And a connector for providing an electrical connection with the outside,
Wherein the connector comprises:
A first connector terminal connected to the other end of the first diagnostic bus bar; And
And a second connector terminal connected to the other end of the second diagnostic bus bar to transmit the current measured by the first and second diagnostic bus bars to the outside. 6. The method according to any one of claims 1 to 5,
A pair of side magnet members for extinguishing an arc generated when the movable contact and the fixed contact are opened;
The relay device further comprising: The method according to claim 6,
Wherein the pair of side magnet members comprise:
And the movable contact and the stationary contact are disposed between the pair of side magnet members.

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