KR20150003570U - Battery disconnect unit for hev - Google Patents

Abstract

The present invention relates to a battery cut-off unit for an electric vehicle, comprising: a housing; A sub-component housed in the housing; A bus bar mounted inside the housing, the bus bar providing an energizing path such that power supplied from the outside is applied to the subcomponent; And a terminal portion integrally formed at one end of the bus bar, the terminal portion connecting the bus and a conductor of the lower component part. As a result, the assembling process between the bus bar and the terminal is eliminated, so that the assembling time can be shortened, and the process number and manufacturing cost can be reduced.

Description

BATTERY DISCONNECT UNIT FOR HEV}

The present invention relates to a battery cut-off unit for an electric vehicle having a terminal-integrated bus bar.

An electric vehicle is an automobile which is driven by rotating electric motors accumulated in a battery.

In this specification, an electric vehicle includes an electric vehicle of a broad concept such as a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), a fuel cell electric vehicle (FCV), a fuel cell hybrid electric vehicle (FCHEV) .

Generally, a battery cut-off unit can be mounted inside the electric vehicle.

The battery disconnecting unit (BDU) is disposed on an energizing path connecting the battery and the motor, so that the battery can be selectively connected to a load such as a motor.

Also, the battery cut-off unit can properly shut off the abnormal voltage from the battery when the voltage is applied to the motor.

FIG. 1 is a perspective view of a battery cut-off unit according to the related art. The battery cut-off unit 1 includes a main relay 3 protruded from the upper portion of the housing 2, a pre-charge relay 4, 5, a current sensor, and the like.

A bus bar 6 may be provided inside the housing 2 as one of the core parts constituting the battery cut-off unit 1. [

The bus bar 6 may serve to energize the battery.

The main relay 3, the precharge relay 4, the precharge resistor 5 and the like of the battery cut-off unit 1 are connected to the bus bar 6 through the terminal 7, And is electrically energized to receive battery power.

However, in assembling the subcomponent 8 of the battery cut-off unit 1 according to the prior art, the terminals 7 are first combined with the bus bar 6, 8, for example, the conductor 9 of the relay 8, the number of assembling steps increases, which may lead to problems such as extension of the assembly process time and omission of parts of the terminal 7.

The bus bar 6 and the conductor 9 of the subcomponent component 8 are fitted into the terminal 9 so that the bus bar 6 and the subcomponent component 8 and the terminal 9 7 are difficult to be controlled, and when assembly tolerances are generated by the control members relative to their assembling dimensions, their coupling is not achieved according to the design intention, so that the contact resistance is increased, The risk of vehicle fire is inherent.

It is a technical object of the present invention to provide a battery cut-off unit for an electric vehicle capable of eliminating the existing problem of shortening the assembling time and omitting the terminal parts by simplifying the assembly between the existing terminal and the bus, have.

It is also an object of the present invention to provide a battery cut-off unit for an electric vehicle that eliminates the need for management of assembly dimensions between a bus bar and subcomponent parts and a terminal, and can overcome the problem of overheating, It is a technical task.

According to an aspect of the present invention, there is provided a battery cut-off unit for an electric vehicle including a housing, subcomponent parts, and a bus bar.

The housing may form the external shape and skeleton of the battery breaker unit.

The subcomponent may be mounted on the upper portion of the housing.

The bus bar may be mounted inside the housing.

The bus bar may provide an energizing path so that an externally supplied power source is applied to the subcomponent components.

Here, the terminal portion may be integrally formed at one end of the bus bar.

The terminal portion may connect the bus and the conductor of the subcomponent.

In one embodiment, the terminal portion may be constituted by a protrusion and a bending portion.

The protrusion may protrude from one end of the bus bar so as to surround a side surface of the conductor.

And the conductor of the subcomponent can be inserted into the protruding portion.

The bending portion may be bent at an end of the protrusion.

As a result, the end of the bending portion can be brought into contact with one surface of the conductor of the subcomponent.

In one embodiment, the terminal portion may include a contact portion formed in a rounded shape at an end portion of the bending portion.

Thereby, the contact portion is tightly fitted to the conductor of the subcomponent component by the elastic force, so that it is unnecessary to manage the assembling dimension between the bus bar and the terminal.

In one embodiment, the projecting portion of the terminal portion may be formed so as to be spaced apart in the width direction of the conductor from both sides of one end of the bus bar.

The bending portion of the terminal portion may be formed symmetrically with respect to the longitudinal center line of the bus bar.

In one embodiment, the subcomponent may include at least one of a relay, a resistor, and a current sensor.

As described above, according to the battery blocking unit for an electric vehicle of the present invention, the assembling process between the bus bar and the terminal is eliminated, so that the assembling time can be shortened, and the number of processes and manufacturing cost can be reduced.

In addition, it is unnecessary to control the assembling dimensions of the interference fit between the terminal and the bus bar in comparison with the existing one, and the problem of omission of components such as terminals can be solved.

In addition, by minimizing the contact resistance between the terminal and the bus bar, it is possible to overcome the problem of overheating due to a contact failure between the existing terminal and the bus bar.

1 is a perspective view of a conventional battery disconnecting unit.
Fig. 2 is an exploded perspective view of the subcomponents of the battery cut-off unit, the terminal and the bus bar in Fig. 1; Fig.
FIG. 3 is an assembled perspective view of FIG. 2. FIG.
FIG. 4 is a perspective view showing an assembling structure between a bus bar and sub-components of the battery cut-off unit according to the present invention. FIG.
FIG. 5 is a perspective view of the terminal-integrated bus bar according to the present invention in FIG.
6 is a plan view taken along the line VI-
Fig. 7 is a plan view showing a state in which a conductor of a lower component part is inserted into a terminal part in Fig. 4. Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

The present invention relates to a battery cut-off unit for an electric vehicle in which assembling performance between bus bars and terminals is improved and assembly time is shortened.

The battery cutoff unit for an electric vehicle according to the present invention may include a housing, subcomponent parts, a power terminal inlet unit, and the like.

The housing may include an upper housing and a lower housing stacked on the upper and lower sides.

The upper housing and the lower housing may be detachably coupled.

The upper housing may be assembled to cover the opening formed at the upper end of the lower housing.

A storage space is provided inside the lower housing, and a printed circuit board may be installed in the storage space.

The terminal pull-in portion may include a power terminal pull-in portion and a load terminal pull-in portion.

The power terminal inlet portion may protrude from one side of the upper surface of the upper housing.

At least one of the power terminal inlet portions may be connected to a positive terminal of the battery by a positive (+) electric wire.

In addition, the other one of the power terminal inlet portions may be connected to the negative terminal of the battery by a negative (-) electric wire.

One end of the electric wire may be connected to the terminal of the battery, and the other end of the electric wire may be connected to the power terminal inlet portion.

The power terminal inlet portion may be configured to surround one end of the bus bar, and one end of the bus bar may be inserted and fixed into the power terminal inlet portion.

The subcomponent may include electrical components such as a main relay, a precharge relay, a precharge resistor, a current sensor, and the like.

The electric elements may be arranged to protrude from the upper surface of the upper housing.

In addition, the electrical components can be electrically coupled to a printed circuit board embedded in the housing.

The electrical components can include a main relay and a precharge relay, etc., and they can be easily accessed without disassembling the housing, thereby easily replacing the respective components.

The load terminal inlet portion may protrude from the other side of the upper surface of the upper housing.

The load terminal inlet portion is electrically connected to a load such as a motor or the like, so that electric energy accumulated in the battery can be supplied to the motor.

At least three annular engaging portions are formed on one side and the other side of the lower housing, and the engaging portions can be used to attach and fix the battery interrupting unit inside the vehicle.

The battery blocking unit can be fixed to the coupling member such as a screw through the through hole of the coupling unit.

4 is a perspective view showing an assembly structure between a lower component 100 and a bus bar 120 of the battery cut-off unit according to the present invention, and FIG. 5 is a perspective view showing a terminal-integrated bus bar 120 according to the present invention, FIG.

Here, a bus bar for energizing the battery power may be coupled to the lower component parts of the battery cut-off unit.

The bus bar 120 may be made of copper, which is an electrical conductor.

One end of the bus bar 120 may be inserted into the power terminal inlet portion, and the remaining portion may extend into the receiving space of the lower housing.

The bus bar 120 may be connected to a (+) power source terminal input unit having a different polarity and a (-) power source terminal input unit having different polarities to draw power supplied from a battery.

The subcomponent 100 may be, for example, a relay.

The subcomponent 100 may include a relay case 110 and at least a plurality of, for example, four, conductors 111 protruding from the bottom surface of the relay case 110.

The conductor 111 may be connected to the bus bar 120 to apply current to the subcomponent 100 from the bus bar 120.

Hereinafter, the structure of the terminal-integrated bus bar 120 according to the present invention will be described.

One end of the bus bar 120 may be connected to the conductor 111 of the relay.

One end of the bus bar 120 may be bent vertically to facilitate assembly with the conductor 111.

Thus, one end of the bus bar 120 and the relay 111 can be connected to each other by the terminal portion 121, which is an electrical conductor.

A terminal portion 121 may be integrally formed at an upper end of the bus bar 120 to improve assembling performance between the bus bar 120 and the relay conductor 111.

The terminal portion 121 can be manufactured by bending a plate.

6 is a plan view of FIG. 5 taken along the line VI-VI of FIG. 5, and FIG. 7 is a plan view showing a state where the conductor 111 of the lower component 100 is inserted into the terminal portion 121 in FIG.

One end of the terminal part 121 extends from the upper end of the bus bar 120 so as to protrude from the side surface of the bus bar 120 And a bending portion 121b that is bent so as to face a surface of the upper end of the conductor 111, that is, a surface on which the conductor 111 is inserted.

The protrusion 121a may be formed so as to surround at least one side of the conductor 111.

At this time, the projecting portion 121a does not have to be in contact with the side surface of the conductor 111. [

In addition, the protrusion 121a may protrude from the side end of the bus bar 120 so as to be curved inward.

The plane angle of the curved surface of the protrusion 121a and one side of the bus bar 120, that is, the conductor 111, may be less than 90 degrees (acute angle). For example, the tangent to the curved surface of the protrusion 121a and the straight angle of the bus bar 120 may be between 70 and 90 degrees.

The conductor 111 may be inserted into the protrusion 121a.

At this time, one surface of the conductor 111 may be in surface contact with one surface of the upper end of the bus bar 120.

The bending portion 121b may be bent at a bending angle of about 180 degrees from the end of the protrusion 121a and the connecting portion between the protrusion 121a and the bending portion 121b may be semicircular.

Thus, the end of the bending portion 121b can be brought into contact with the other surface of the conductor 111.

The terminal portion 121 may have a contact portion 121c extending in a semicircular shape at an end of the bending portion 121b in order to reduce the contact resistance between the bending portion 121b and the conductor 111 as much as possible.

The contact portion 121c may be spaced apart from a surface of the bus bar 120, that is, a surface on which the conductor 111 is inserted.

The gap between the contact portion 121c and the bus bar 120 may be formed to be slightly smaller than the thickness of the conductor 111. [

For example, if the thickness of the conductor 111 is about 1 to 2 mm, the gap between the contact portion 121c and the bus bar 120 is preferably about 0.5 to 1 mm.

This is because the conductor 111 may not be inserted into the gap between the contact portion 121c and the bus bar 120 when the distance between the contact portion 121c and the bus bar 120 is less than 0.5 mm, The contact between the contact portion 121c and the bus bar 120 can not be achieved according to the intended design, thereby increasing the contact resistance.

The contact portion 121c may contact the bus bar 120 at a vertex of a semicircular shape.

At this time, the contact portion 121c and the bus bar 120 may be in line contact.

As a result, the contact area between the contact portion 121c and the bus bar 120 is minimized, so that the contact resistance can be reduced.

The contact portion 121c extends integrally from the fixed protruding portion 121a and can be made elastic to be a free end of the terminal portion 121. [

The protrusion 121a may be formed so as to surround at least both sides of the conductor 111.

The projecting portion 121a and the bending portion 121b may be integrally formed and protrude laterally from both sides of the upper end of the bus bar 120. [

The protruding portion 121a and the bending portion 121b or the protruding portion 121a, the bending portion 121b and the contact portion 121c may be formed symmetrically with respect to the longitudinal center line of the bus bar 120.

In this case, there may be at least two points of contact between the contact portion 121c of the terminal and the conductor 111 of the subcomponent 100.

When the conductor 111 of the relay is inserted between the contact portion 121c and the bus bar 120, the contact portion 121c is brought into close contact with the conductor 111 by elasticity while being spread in the thickness direction of the conductor 111 Can be contacted.

Therefore, according to the present invention, since the terminal portion 121 is integrally formed with the bus bar 120, it is not necessary to assemble the existing terminal to the bus bar 120, thereby reducing the number of assembly processes.

Also, the number of assembling processes for assembly between the bus bar 120 and the sub-component parts 100 is reduced, thereby shortening the assembling time and improving assembling performance and reducing the manufacturing cost.

Also, due to the assembly tolerance between the conventional terminal and the bus bar 120, it is possible to prevent excessive heat generation inside the product due to an increase in contact resistance, and to remove a dangerous element that causes a vehicle fire.

In addition, due to the elastic structure of the contact portion 121c, the dimension for interference fit between the existing bus bar 120 and the terminal, and the size of the interference between the conductor 111 of the subcomponent 100 of the battery cut- There is an advantage that dimension management for fitting is easy.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the above-described exemplary embodiments and that various modifications and changes may be made by those skilled in the art, Modified forms are also included in the scope of this invention.

100: Subcomponents
110: Relay case
111: Conductor
120: Bus bar
121: Terminal section
121a:
121b:
121c:

Claims (5)

housing;
A subcomponent mounted on the housing;
A bus bar mounted inside the housing, the bus bar providing an energizing path such that power supplied from the outside is applied to the subcomponent; And
A terminal unit integrally formed at one end of the bus bar and connecting the bus bar and a conductor of the lower component part;
Wherein the battery block unit comprises: The method according to claim 1,
The terminal unit includes:
A protrusion protruding from one end of the bus bar so as to surround the side of the conductor, the conductor of the subcomponent being inserted inward; And
A bending portion bending at an end of the protrusion so that an end portion thereof can be brought into contact with one surface of the conductor of the subcomponent;
Wherein the battery is a battery. 3. The method of claim 2,
The terminal unit includes:
And a contact portion which is formed in a round shape at an end of the bending portion and is tightened so as to be brought into close contact with the conductor of the subcomponent component by an elastic force. 3. The method of claim 2,
The projecting portion of the terminal portion is formed so as to be spaced apart from the both sides of one end of the bus bar in the width direction of the conductor,
Wherein the bending portion of the terminal portion is formed symmetrically with respect to a longitudinal center line of the bus bar. The method according to claim 1,
Wherein the subcomponent includes at least one of a relay, a resistor, and a current sensor.

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