KR20190027095A - Charger inlet for electric vehicle with improved earth structure - Google Patents

Abstract

The present invention relates to a charger inlet for an electric vehicle with an improved earth structure, which comprises: a housing including an accommodation holder in which a plurality of terminals are accommodated and arranged and a fixing part formed to be fixed and installed to a vehicle; an earth bus bar which is electrically connected to the vehicle after one end is arranged in the accommodation holder and the other end, which is extended from the one end, is inserted into the fixing part; and an earth terminal electrically connected to one end of the earth bus bar.

Description

[0001] CHARGER INLET FOR ELECTRIC VEHICLE WITH IMPROVED EARTH STRUCTURE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charger inlet for an electric vehicle installed on a vehicle side for charging an electric vehicle.

Recently, environmental issues have become an issue, and environment-friendly automobiles have been highlighted as a target of energy conservation and minimization of environmental pollution. Particularly, hydrogen fuel cell automobiles, biodiesel automobiles, and electric vehicles are attracting attention as substitutes for automobiles composed of conventional internal combustion engines. Among them, an electric car is an automobile that uses electric power and uses electric energy as a raw material by storing it in a battery. Electric vehicles can be divided into EV (Electric Vehicle), Plug-in Hybrid EV (PHEV), and Hybrid EV (EV) depending on the usage and utilization rate of electric energy. First, HEV (Hybrid EV) is an automobile that combines the power of two types of internal combustion engine and electric motor. It is characterized by realizing higher fuel efficiency and higher efficiency than conventional internal combustion engines. The plug-in hybrid EV (PHEV) refers to a vehicle designed to charge the battery of the HEV from the outside, and EV (Electric Vehicle) refers to a vehicle driven only by a battery and an electric motor.

HEV, PHEV, and EV automobiles commonly use electrical energy for driving vehicles. HEVs use electric energy in vehicles, while PHEVs and EVs receive power from the outside. An electric vehicle supplied with electric power from the outside is provided with a rapid charging section and a slow charging section for charging the battery. The battery of the electric car can be charged by the rapid charger or the fast charger. The fast charger is a charger that converts the 380V power of the three phase AC to the direct current, and the battery can be charged within a short time. The rapid charger is connected to the rapid charging part of the electric vehicle and directly connected to the battery of the electric vehicle to apply the electric energy.

On the other hand, a slow charger is a charger using a single-phase AC 220V power source, and takes a long time to charge the battery. The slow charger is used in connection with the fully charged part of the electric vehicle, and electric energy is applied to the battery through a converter that converts AC power to DC power in the electric vehicle. When charging the electric vehicle using the slow charger as described above, the outlet connector for charging the electric vehicle is connected to the inlet connector provided in the electric vehicle to charge the electric vehicle.

However, the conventional fast charger or the slow charger is grounded through the ground wire connected to the inlet connector. However, the use of the ground wire not only increases the number of assembling steps, but also makes it difficult to package the charger inlet and increases the cost. Further, the ground wire has a problem in that noise is generated because a wire having a relatively long length is used depending on the position of the grounding point.

Korean Registered Patent No. 10-1380573 (Registered on March 24, 2014) Korean Patent Publication No. 10-2013-0136290 (Dec. 12, 2013) Korean Registered Patent No. 10-1566722 (Registered on November 2, 2015)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a charger inlet for an electric vehicle that can be easily grounded through a ground structure packaged in the charger inlet itself.

It is an object of the present invention to provide a charger inlet for an electric vehicle which can reduce cost by eliminating a grounding wire used for conventional grounding and reduce work flow through an improved grounding structure.

And to provide a charger inlet for an electric vehicle that can improve the grounding structure to improve the generation of noise.

According to an embodiment of the present invention, there is provided a portable terminal comprising: a housing including a housing holder in which a plurality of terminals are housed and disposed; A ground bus bar having one end disposed in the receiving holder and the other end extending from the one end inserted into the fixed portion and electrically connected to the vehicle body; And a ground terminal electrically connected to one end of the ground bus bar, wherein the ground terminal is electrically connected to the ground terminal.

The other end of the ground bus bar may be formed with a contact portion that is in surface contact with the vehicle body.

The upper surface of the contact portion may be located outside the fixing portion.

A plurality of divided pieces arranged in a circle at regular intervals and arranged in a circular shape at the other end of the ground bus bar are formed and the divided pieces can be bent and deformed perpendicularly to the extending direction by an external force.

The split pieces may be inclined inward in the radial direction.

And a ground insert ring which is forcedly contacted by the resilient restoring force generated when the divided angled piece is inserted in the radially outward direction when the divided angled piece is inserted into the fixed portion.

The ground terminal includes a head portion; And a fin portion extending from the head portion.

The head portion and the ground bus bar may be in surface contact with each other.

A ring-shaped annular portion may be formed at one end of the ground bus bar.

The fixing unit may further include a groove formed on an upper surface of the head unit, and a fixing member penetrating the groove and fastened to the groove.

And a fixed holder having a plurality of protrusions protruding to one side to fix the terminal and the ground terminal.

A sealing member may be further disposed on an outer circumferential surface of the protrusion, which is inserted into a receiving holder in which the ground terminal is housed.

The receiving holder may include a fast charging holder and a fast charging holder.

The receiving holder may be provided with five or seven terminals.

As described above, according to the present invention, various effects including the following can be expected. However, the present invention does not necessarily achieve the following effects.

The charger inlet according to one embodiment can be easily grounded through a ground structure packaged in itself. In addition, it is possible to reduce the cost by eliminating the ground wire used for the conventional grounding, and reduce the work flow through the improved grounding structure.

In addition, the occurrence of noise can be reduced through the improved ground structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a charger inlet for an electric vehicle in accordance with a first embodiment of the present invention; FIG.
Fig. 2 is a perspective view showing the inlet of Fig. 1 installed on a vehicle body; Fig.
3 is an enlarged perspective view of part A of Fig.
Fig. 4 is an exploded perspective view of Fig. 1; Fig.
5 is a sectional view taken along the line V-V 'of FIG.
Figure 6 is an exploded perspective view of Figure 5;
7 is a perspective view of a charger inlet for an electric vehicle in which a grounding structure according to a second embodiment of the present invention is improved;
8 is an exploded perspective view of Fig.
9 is a cross-sectional perspective view taken along line IX-IX 'of Fig. 7;
10 is a partial cross-sectional view of Fig.
11 is a perspective view showing that the split angle piece of Fig. 7 is inserted into the insert ring; Fig.
FIG. 12 is a perspective view of a charger inlet for an electric vehicle in which a grounding structure according to a third embodiment of the present invention is improved; FIG.
13 is an exploded perspective view of Fig.
FIG. 14 is a perspective view taken along the line XIV-XIV 'of FIG. 12; FIG.
15 is a perspective view of a charger inlet for an electric vehicle in which the ground structure according to the fourth embodiment of the present invention is improved;
Fig. 16 is an exploded perspective view of Fig. 15. Fig.
FIG. 17 is a perspective view taken along the line XVII-XVII 'of FIG. 15; FIG.

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

The charger inlet for an electric vehicle having improved grounding structure according to an embodiment of the present invention includes a housing 10, a ground bus bar 20, a ground terminal 30, a fixed holder 40, a fixed cover 45, . The ground has the purpose of preventing electrical accidents such as electric shock to the user when the charger outlet is connected to the charger inlet.

[First Embodiment]

FIG. 1 is a perspective view of a charging apparatus inlet for an electric vehicle in which the grounding structure according to the first embodiment of the present invention is improved, FIG. 2 is a perspective view showing the installation of the inlet of FIG. 1 on the vehicle body, FIG. 4 is an exploded perspective view of FIG. 1, FIG. 5 is a sectional view in the V-V 'direction of FIG. 1, and FIG. 6 is an incision oblique view of FIG.

1 to 6, the housing 10 is formed by injection molding with a synthetic resin or the like, and includes a receiving holder 12 in which a plurality of terminals are accommodated and disposed, and a fixing portion 14). The accommodating holder 12 is a portion where the charger outlet is inserted, and the accommodating space formed with the both ends thereof being opened is divided by the partition wall so that the accommodated terminals are isolated from each other so that they are not in contact with each other.

Specifically, in the receiving holder 12 of the first embodiment, five through holes are formed, and each of the through holes is provided with a continuous power supply plus terminal (not shown) including a ground terminal 30, a slow power supply minus terminal ), A control signal terminal (not shown), and a switch terminal (not shown). The control signal terminal is a terminal for approving permission for starting charging through the charging outlet. The four cables except the ground terminal 30 are electrically connected to the respective wire cables. That is, the charger inlet according to the first embodiment can receive the slow power and charge the high voltage battery in the vehicle.

The fixing portion 14 is formed on each corner of the housing 10, and an insert ring can be further disposed in each fixing portion 14. [ The charger inlet is fixed to the body. Specifically, when the housing 10 is disposed so that the fixing portion 14 is aligned with the inlet fixing piece 70 formed on the body, the charging inlet is fastened to the inlet fixing piece 70 through the insert ring And can be fixedly mounted on the vehicle body through the fastening member 72.

However, the charger inlet according to an embodiment of the present invention is characterized in that the other end 22 of the ground bus bar 20 is inserted into one of the fixing portions 14 instead of the insert ring and the ground bus bar 20 is fixed to the inlet And has a grounding structure that is in direct contact with the piece (70). As a result, current can flow from the charger outlet to the vehicle body through the ground terminal 30, the ground bus bar 20 and the inlet fixture 70.

The ground bus bar 20 is made of a conductive material and has one end 24 disposed in the receiving holder 12 and the other end 22 extending from one end inserted into the fixed portion 14 and electrically connected to the vehicle body Structure. Specifically, one end 24 and the other end 22 of the ground bus bar 20 have a cylindrical shape. In particular, through-holes 25 and 23 penetrating both sides are formed at the center in the height direction of the cylinder have. One end (24) and the other end (22) are connected to a plate-like connecting portion (26). The other end (22) fixed to the vehicle body is formed longer than the one end (24).

The ground bus bar 20 can be fixedly arranged on the housing 10 having a different material through the insert injection method. The insert injection method can improve the relative positional accuracy of the ground bus bar 20 with respect to the housing 10. [ For example, the connection portion 26 connecting between one end and the other end of the ground bus bar 20 may be disposed inside the housing 10 through an insert injection method. Therefore, the coupling portion 26 is formed with a coupling hole 27 for increasing the coupling force when the insert is injected. At this time, the connection portion 26 may be formed in a straight line. This minimizes the movement distance of the current, thereby reducing the occurrence of noise. However, it may be partially bent to prevent interference with other parts.

One end (24) of the ground bus bar (20) can be closely fixed within the receiving holder (12). The receiving holder 12 may further include a seating groove for fixing the position of one end of the ground bus bar 20. The other end (24) of the ground bus bar (20) can be closely fixed within the fixing part (14) by an insert injection method. At this time, the other end 22 of the ground bus bar 20 may be further provided with a ring fastener 28 or the like. This ensures that the ground bus bar 20 can be stably fixed to the position even if an external vibration or an impact is applied to the housing 10.

On the other hand, at the other end 22 of the ground bus bar 20, a contact portion 21 which is in surface contact with the vehicle body can be formed. That is, the other end 22 of the ground bus bar 20 protrudes further upward than the connecting portion 26 to form the contact portion 21. Therefore, the upper surface of the contact portion 21 can be located outside the fixing portion 14. That is, when the other end of the ground bus bar 20 is inserted into the fixed portion 14 and disposed in close contact with the fixed portion 14, the upper surface of the contact portion 21 can be protruded outside the fixed portion 14. As a result, the upper surface of the abutment 21 is more effectively in surface contact with the above-described inlet fixture 70.

The ground terminal 30 is made of a conductive material and is in contact with one end of the ground bus bar 20 and electrically connected to each other. The ground terminal 30 may include, for example, a head portion 32 and a pin portion 34 extending from the head portion 32. At this time, the head portion 32 and the ground bus bar 20 are in surface contact with each other. On the other hand, when the ground terminal 30 is assembled with the ground bus bar 20 in the receiving holder 12, the pin portion 34 is arranged to face the opposite opening of the receiving holder 12, The charger outlet is inserted and coupled.

The ground terminal 30 is inserted into the through hole 25 formed at one end of the ground bus bar 20 at the fixed holder 40 side as shown in FIG.

The charger inlet according to an embodiment may further include a fixed holder 40 for fixing the four terminals and the ground terminal 30 by forming a plurality of protruding portions 42 projecting to one side. Further, the fixed holder (40) blocks moisture and the like from flowing into the receiving holder (12). In particular, a sealing member 56 may be disposed on the outer circumferential surface of the protrusion 42 inserted into the receiving holder 12 in which the ground terminal 30 is received. This effectively blocks the influx of moisture. Terminals other than the ground terminal 30 are waterproofed by using the heat-shrinkable tube to the terminal and the wire crimping portion, so that no separate sealing member is required.

The stationary cover 42 is coupled to the opposite surface of the stationary holder 40, which is coupled with the receiving holder 12. The fixed cover 42 surrounds one side of the fixed holder 40 and fixes the fixed holder 40 to the receiving holder 12 by fixing the receiving holder 12 and fixing means such as a screw.

[Second Embodiment]

FIG. 7 is a perspective view of a charging apparatus inlet for an electric vehicle in which a grounding structure according to a second embodiment of the present invention is improved, FIG. 8 is an exploded perspective view of FIG. 7, FIG. 9 is a perspective view taken along line IX- Fig. 10 is a partial cross-sectional view of Fig. 9, and Fig. 11 is a perspective view showing that the split angle piece of Fig. 7 is inserted into the insert ring.

Referring to FIGS. 7 to 11, the charger inlet according to the second embodiment has substantially the same components as those of the first embodiment, and a repeated description thereof will be omitted. First, the housing 10 is not functionally different from the housing 10 mentioned in the first embodiment. That is, five through-holes are formed in the receiving holder 12 of the second embodiment, and each of the through holes is provided with a continuous power supply plus terminal (not shown) including the ground terminal 30, ), A control signal terminal (not shown), and a switch terminal (not shown). That is, the charger inlet according to the second embodiment can receive the slow power and charge the high voltage battery in the vehicle.

The ground bus bar 20 is connected to the ground bus 12 in the first embodiment in that one end of the ground bus bar 20 is disposed in the receiving holder 12 and the other end of the ground bus bar 20 is inserted into the fixed portion 14, Functionally the same as the bar 20. However, in the second embodiment, the ring-shaped annular portion 23 may be formed at one end of the ground bus bar 20.

A plurality of divided pieces 25 are arranged at regular intervals on the other end of the ground bus bar 20. The divided pieces 25 are deformed in a direction perpendicular to the extending direction by an external force . At this time, the divided pieces 25 arranged in a circular shape may be formed to be inclined inward in the radial direction.

Correspondingly, a ground insert ring 52 may be further disposed in the fixed portion 14 to which the other end of the ground bus bar 20 is coupled. The ground insert ring 52 is formed so that each inner side surface of the divided piece 25 is connected to the ground insert ring 52 by elastic restoring force generated when the divided piece 25 is inserted in the radially outward direction when the divided piece 25 is inserted Force contact. That is, the plurality of divided pieces 25 can improve the contact instability due to the assembly tolerance that may occur between the ground insert rings 52 due to the bending deformation and the elastic restoring force.

The ground insert ring 52 is formed of a conductive material. On the other hand, the ground insert ring 52 is further formed with a fastening hole passing through both ends. The housing 10 is fixed to the inlet fixing part 70 by a fastening member 72 passing through the fastening hole and a current can flow from the ground bus bar 20 to the vehicle body side.

In the second embodiment, a ring-shaped ring 23 may be formed at one end of the ground bus bar 20. Correspondingly, the groove portion 36 may be further formed on the upper surface of the head portion 32 constituting the ground terminal 30. At this time, the charger inlet may further include a fixing member 54 which passes through the ring portion 23 and is fastened to the groove portion 36. The fixing member 54 fixes the ground terminal 30 and the ground bus bar 20 in a fixed manner. A thread is formed on the inner circumferential surface of the groove portion 36 and a thread corresponding to the outer circumferential surface of the corresponding portion of the fixing member 54 inserted into the groove portion 36 is formed. Therefore, the ground bus bar 20 can be fixed by screwing the fixing member 54 to the groove portion 36 using a tool such as a wrench.

When the ground terminal 30 is first placed in the receiving holder 12, one end of the ground bus bar 20 is brought into surface contact with the upper surface of the head portion 32 of the ground terminal 30 The ground bus bar 20 is disposed and finally the fixing member 54 penetrates through the ring 23 and is fastened to the groove 36. [

[Third Embodiment]

FIG. 12 is a perspective view of a charger inlet for an electric vehicle in which a ground structure according to a third embodiment of the present invention is improved, FIG. 13 is an exploded perspective view of FIG. 12, and FIG. 14 is a perspective view taken along line XIV- .

 Referring to FIGS. 12 to 14, the charger inlet according to the third embodiment has substantially the same components as those of the first embodiment, and a repeated description thereof will be omitted. The charger inlet according to the third embodiment can receive not only the slow power but also the rapid power. To this end, the housing 10 is further formed with a receiving holder 12b which can receive a rapid power supply positive terminal (not shown) and a quick power supply negative terminal (not shown), respectively, unlike the first embodiment.

That is, the charger inlet according to the third embodiment can charge the high-voltage battery by any one of the slow charger outlet and the rapid charger outlet. Therefore, the housing 10 is provided with a receiving holder 12a having five through-holes for fast charging and a receiving holder 12b having two through-holes for quick charging, A holder 40a and a rapid charging fixation holder 40b for fixing the rapid power supply positive terminal and the rapid power supply negative terminal to the accommodating holder 12b formed for rapid charging are provided. The rapid charging fixed holder 40b can block the inflow of moisture or the like into the receiving holder 12b.

The ground bus bar 20 is functionally the same as the ground bus bar 20 described above in the first embodiment, though the overall shape may be partially changed according to the shape change of the housing.

[Fourth Embodiment]

FIG. 15 is a perspective view of a charger inlet for an electric vehicle in which a ground structure according to a fourth embodiment of the present invention is improved, FIG. 16 is an exploded perspective view of FIG. 15, and FIG. 17 is a perspective view taken along a line XVI- .

15 to 17, the charger inlet according to the fourth embodiment has substantially the same components as those of the third embodiment, and a repeated description thereof will be omitted. The charger inlet according to the fourth embodiment can receive not only the slow power but also the rapid power. To this end, the housing 10 is further provided with a fast-charge accommodating holder 12b in which a rapid-power-supply positive terminal (not shown) and a rapid-power-supply negative terminal (not shown) Respectively.

However, unlike the third embodiment, seven through-holes are formed in the fast-charge accommodating holder 12a. In each of the through-holes, a continuous power supply plus terminal (not shown) including a ground terminal 30, A terminal (not shown), a control signal terminal (not shown), and a switch terminal (not shown). At this time, the three-phase power supply 1 terminal (not shown) and the three-phase power supply 2 terminal (not shown) may be further disposed in the remaining two through holes so that power can be supplied through the three-phase power supply. As described above, the submerged charging holder 12a having seven terminals can be adopted only in a country having a three-phase power supply system such as Europe.

That is, in the charging apparatus inlet according to the fourth embodiment, seven through-holes are formed in the full-charge charging holder 12a so that a total of seven terminals including the ground terminal 30 can be disposed therein Except for the points, the other constitution is substantially the same as each constituent element described in the first embodiment to the third embodiment.

The charger inlet according to the embodiments of the present invention can be easily grounded through a ground structure packed in itself, that is, the ground terminal 30 and the ground bus bar 20 and the like. In addition, it is possible to reduce the cost by eliminating the ground wire which has been conventionally used, and it is possible to reduce the number of workings.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

10: housing 20: ground bus bar
30: ground terminal 21: ground
25: split corner piece 40, 40a, 40b: fixed holder
52: grounding insert ring 32: head portion
34: pin portion 23:
36: groove portion 54: fixing member
56: sealing member 70: inlet fixing member
12, 12a, 12b: reception holder 14:
72: fastening member

Claims (14)

A housing including a housing holder in which a plurality of terminals are housed and arranged, and a fixing part formed to be fixedly installed on the vehicle body;
A ground bus bar having one end disposed in the receiving holder and the other end extending from the one end inserted into the fixed portion and electrically connected to the vehicle body; And
And a ground terminal electrically connected to one end of the ground bus bar.
The method according to claim 1,
And the other end of the ground bus bar is in contact with the vehicle body.
3. The method of claim 2,
And an upper surface of the contact portion is located outside the fixing portion.
The method according to claim 1,
Wherein the ground bus bar has a plurality of divided pieces arranged at regular intervals and arranged in a circular shape and the divided pieces are bent and deformed perpendicularly to an extending direction by an external force.
5. The method of claim 4,
Wherein each of the split bridges is formed to be inclined in a radially inward direction.
6. The method of claim 5,
And a grounding insert ring which is forcibly brought into contact with the stationary portion by an elastic restoring force generated when the divided angle piece is inserted in a radially outward direction when the divided angle piece is inserted into the fixing portion.
2. A connector according to claim 1, wherein the ground terminal
Head portion; And
And a fin portion extending from the head portion.
8. The method of claim 7,
Wherein the head portion and the ground bus bar are in surface contact with each other.
9. The method of claim 8,
And a ring-shaped annular portion is formed at one end of the ground bus bar.
10. The method of claim 9,
A groove portion is further formed on an upper surface of the head portion,
And a fixing member which penetrates through the ring portion and is fastened to the groove portion.
The method according to claim 1,
And a fixed holder formed with a plurality of protrusions projecting to one side to fix the terminal and the ground terminal.
12. The method of claim 11,
Wherein a sealing member is further disposed on an outer circumferential surface of the protrusion, the protrusion being inserted into a receiving holder in which the ground terminal is housed.
The method according to claim 1,
Wherein the accommodating holder has a grounding structure that includes a gradually charging holder and a fast charging holder.
The method according to claim 1,
Wherein the terminal holder is provided with five or seven terminals in the housing holder.

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