CN109177756B - Direct-current charging pile with automatic tripping protection of charging interface - Google Patents
Direct-current charging pile with automatic tripping protection of charging interface Download PDFInfo
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- CN109177756B CN109177756B CN201811117676.3A CN201811117676A CN109177756B CN 109177756 B CN109177756 B CN 109177756B CN 201811117676 A CN201811117676 A CN 201811117676A CN 109177756 B CN109177756 B CN 109177756B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
- H01R13/633—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/22—Contacts for co-operating by abutting
- H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
- H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
- H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
- H01R13/633—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only
- H01R13/635—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only by mechanical pressure, e.g. spring force
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/26—Connectors or connections adapted for particular applications for vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The invention discloses a direct current charging pile with an automatic tripping protection of a charging interface, wherein an end head of a charging gun head is axially provided with a plug end in a telescopic manner, the center of a column body of the plug end is axially provided with a through hole in a penetrating manner, the periphery of the through hole is provided with a first channel, the through hole is internally provided with a pair of half-section bodies, the periphery of each half-section body is provided with a second channel, and the first channel and the second channel are in butt joint to form a conductive plug hole; a half conical concave cavity is axially formed in the cross section of the half-section body, a conical column body is arranged in the half conical concave cavity on the left side and the right side in a telescopic mode, a pair of cavity channels are axially symmetrically formed in the inner side end of the plug-in end, a limiting cavity is formed in the outer side end of each cavity channel, the inner side end of each conical column body is connected with the telescopic end of a telescopic mechanism, a pair of branch linkage rods are symmetrically arranged on the two sides of each telescopic end, a linkage head is arranged on the end of each branch linkage rod in a protruding mode, and the linkage heads are limited to move in the limiting cavities. The invention solves the technical problem that the direct current charging pile has no mechanical overcurrent protection mechanism.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a direct-current charging pile with a charging interface for automatic tripping protection.
Background
The charging pile has the function similar to that of an oiling machine in a gas station, can be fixed on the ground or a wall, is installed in public buildings (public buildings, malls, public parking lots and the like) and residential community parking lots or charging stations, and can charge electric automobiles of various types according to different voltage levels. The input end of the charging pile is directly connected with an alternating current power grid, and the output end of the charging pile is provided with a charging plug for charging the electric automobile. The charging pile generally provides two charging modes of conventional charging and quick charging, people can use a specific charging card to swipe the card on a man-machine interaction operation interface provided by the charging pile for corresponding charging mode, charging time, charge data printing and other operations, and a charging pile display screen can display data of charging quantity, charge, charging time and the like.
The charging pile is generally divided into a direct-current charging pile and an alternating-current charging pile, wherein the vehicle-mounted charger is required to be carried when the alternating-current charging pile is used, and the power of the vehicle-mounted charger of the electric automobile is generally smaller, so that the alternating-current charging pile cannot realize rapid charging. Specifically, the ac charging pile has the following characteristics: the power supply device is fixedly arranged outside the electric automobile and connected with an alternating current power grid to provide alternating current power for the vehicle-mounted charger of the electric automobile. Only provides power output, has no charging function and plays a role in controlling a power supply. The direct current charging pile can provide enough power, the output voltage and current adjustment range is large, and the requirement of quick charging can be realized. Specifically, the direct current fills electric pile has following characteristics: the power supply device is mainly installed in a large charging station, is connected with a power grid in a three-phase four-wire system mode, can provide sufficient electric power, and has a large output voltage and current adjustment range.
From the above, the advantages of the direct current charging pile are more obvious, the output power is higher, and the charging process is faster. However, since the output power of the direct current charging pile is high, the charging current is high especially in the initial stage of charging the automobile battery. In the prior art, the effect of the electric protection during the charging process of the vehicle is limited, so that the battery pack and the charging pile are difficult to protect when the electric fault occurs. In addition, most of the existing direct current charging pile protection mechanisms are electronic, and are not provided with mechanical protection isolation mechanisms, so that the protection performance of the charging pile and the battery pack is limited.
Disclosure of Invention
It is an object of the present invention to solve at least the above problems and to provide at least the advantages to be described later.
The invention aims to provide a direct-current charging pile with an automatic tripping protection charging interface, wherein a gun jumping mechanism is arranged on a charging gun head connected with the charging pile, and when overcurrent or overvoltage occurs, a battery pack and the charging pile can be separated through the gun jumping mechanism, so that the direct-current charging pile has an effective protection effect, and the electricity utilization guarantee function of the charging pile is improved. The invention solves the technical problem that the direct current charging pile has no mechanical overcurrent protection mechanism.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a direct current charging pile for automatic trip protection of a charging interface, comprising:
the input end of the charging pile body is connected with a three-phase power supply;
the charging gun head is connected with the output end of the charging pile body, a cylindrical inserting end is axially arranged on the end head of the charging gun head in a telescopic mode, a through hole is axially formed in the center of the cylinder of the inserting end in a penetrating mode, a plurality of first channels are distributed on the periphery of the through hole, and the length direction of each first channel is consistent with the axial direction of the inserting end; a pair of half-section bodies are radially arranged in the through hole in a telescopic manner, the half-section bodies and the plug-in ends axially move synchronously, the peripheral side wall of the half-section bodies is matched with the left inner side wall or the right inner side wall of the through hole, a plurality of second channels corresponding to the first channels are distributed on the periphery of the half-section bodies, and when the peripheral side wall of the half-section bodies is attached to the left side wall and the right side wall of the through hole, the first channels are in butt joint with the second channels to form conductive plug-in holes for plugging in automobile charging pin interfaces;
a half conical concave cavity is formed in the cross section of the half cross section body along the axial direction, the inner diameter of the half conical concave cavity is gradually increased towards the inner side end, a conical column body is telescopically arranged in the half conical concave cavity on the left side and the right side, the diameter of the conical column body is gradually increased towards the inner side end, and the outer surface of the conical column body is selectively attached to the half conical concave cavity;
a pair of cavity channels are axially and symmetrically arranged on the inner side end of the insertion end, the length direction of each cavity channel is parallel to the length direction of the through hole, the inner side end of each cavity channel is open, a limiting cavity is formed in the insertion end at the outer side end of each cavity channel, and the inner diameter of each limiting cavity is larger than that of each cavity channel; the inner side end of the conical cylinder is connected with the telescopic end of a telescopic mechanism, a pair of branch linkage rods are symmetrically arranged on two sides of the telescopic end, the branch linkage rods are parallel to the telescopic end and move synchronously, a linkage head is arranged at the end of each branch linkage rod in a protruding mode, the diameter of the linkage head is between the inner diameter of the limiting cavity and the inner diameter of the cavity channel, the linkage head is limited to move in the limiting cavity, and the width of the limiting cavity is larger than that of the linkage head.
Preferably, the charging gun head is internally provided with a containing cavity, the through hole is communicated with the containing cavity, the periphery of the first channel is provided with a conducting layer, the plug-in end and the half-section body are insulators, the inner side end of the first channel extends to the containing cavity, the extending end of the first channel is externally connected with a conducting connecting wire, and the conducting connecting wire is connected with the output end of the charging pile body along the charging gun head.
Preferably, the inner side wall of the through hole is in an arc surface structure, the conductive plug holes on the charging gun head are distributed along the outer side wall of the through hole, the outer side wall of the half-section body is provided with an arc surface structure matched with the left side wall and the right side wall of the through hole, and the outer side wall of the half-section body is selectively attached to the inner side wall of the through hole; the first channel and the second channel are in a semicircular structure, and the first channel corresponds to the second channel one by one.
Preferably, the cross section direction of the half-section body is parallel to the axial direction of the plug-in end, a reserved gap is arranged between the cross sections of the half-section body at the left side and the right side, and the maximum distance of the reserved gap is not more than the diameter of the first channel.
Preferably, at least one guide block is arranged on the side wall of the through hole on the left side and the right side in a protruding manner, and the guide blocks are positioned on the side wall of the through hole between two adjacent first channels; the outer peripheral side wall of the half-section body is provided with a guide hole corresponding to the guide block, and the guide block is inserted into the guide hole;
the length of the guide block and the depth of the guide hole are not smaller than the radius of the first channel, and the half-section body is sleeved on the guide block through the guide hole, so that the half-section body is radially telescopic in the left-right direction.
Preferably, a first spring is arranged on the side wall of the through hole on one side of the guide block in a protruding mode, and the first spring is clamped between the side wall of the through hole and the side wall of the periphery of the half-section body.
Preferably, a limiting block is arranged at the inner side end of the first channel, a second spring is arranged in the first channel at the outer side of the limiting block, and the length of the second spring is not more than one third of the length of the first channel.
Preferably, an opening communicated with the accommodating cavity is formed in the end head of the charging gun head, the inserting end is arranged in the opening in a telescopic mode, the opening extends a certain distance in the axial direction, a plurality of guide grooves are formed in the inner side wall of the opening in the axial direction, a plurality of guide protrusions are correspondingly arranged on the outer side wall of the inserting end in a protruding mode, and the guide protrusions are movably arranged in the guide grooves.
Preferably, the inner side end of the semi-conical concave cavity is communicated with the accommodating cavity, the telescopic mechanism is arranged in the accommodating cavity, the end head of the telescopic end of the telescopic mechanism is connected with the center of the inner side end of the conical column body, and the telescopic direction of the telescopic mechanism is consistent with the central axis of the inserting end.
Preferably, the cavity is symmetrically arranged at the left side and the right side of the shaft center of the inserting end, the linkage heads are correspondingly arranged at the left side and the right side of the telescopic end, the branch linkage rod is arranged in the cavity in a telescopic way, and the end head of the telescopic end protrudes outwards from the linkage heads by a certain distance.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the mechanical isolation protection mechanism is arranged between the charging pile and the vehicle-mounted charging connector, so that the safety protection performance of the direct-current charging pile is improved;
2. when overcurrent or overvoltage occurs, the battery pack and the charging pile can be separated through the gun jumping mechanism, so that an effective protection effect is achieved, the electricity utilization guaranteeing function of the charging pile is improved, the mechanical fault of charging is removed, and the reliability of equipment protection is improved;
3. the anti-overcurrent, anti-overvoltage and anti-lightning performances of the charging pile are improved, and the damage of electronic components and vehicle-mounted battery packs in the charging pile is avoided;
4. after the vehicle-mounted battery pack is charged, the battery can be separated from the charging pile through the gun jumping mechanism, so that the battery pack is prevented from being in a floating charge state for a long time, and the service life of the battery pack is prolonged.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a front view of the charging gun head;
FIG. 3 is a cross-sectional view of the charging gun head housing;
FIG. 4 is a schematic view of the structure of the inside of the through hole;
FIG. 5 is a schematic view of the structure of the inside end of the mating end;
FIG. 6 is a schematic view of the mounting structure of the tapered cylinder in the through hole;
FIG. 7 is a cross-sectional view of a through hole;
FIG. 8 is a schematic view of the mounting location of the half section;
FIG. 9 is a schematic view of the plug when the conductive via is released;
FIG. 10 is a schematic view of the structure after the mating end is retracted;
FIG. 11 is a schematic view of the structure of the connector when the conductive vias are closed;
FIG. 12 is a schematic view of the position of the tapered cylinder after the conductive vias are gathered;
fig. 13 is a schematic diagram of the connection structure of the branching link lever.
Detailed Description
The present invention will be described in further detail below with reference to the drawings so that those skilled in the art can practice the invention by referring to the description.
As shown in fig. 1-13, the present invention provides a dc charging pile with automatic tripping protection for a charging interface, comprising: a charging pile body 100 and a charging gun head 200. The input end of the charging pile body 100 is connected with a three-phase power supply, the charging gun head 200 is connected with the output end of the charging pile body 100, a cylindrical plug-in end 210 is arranged on the end of the charging gun head 200 in a telescopic manner, and in a normal state, the plug-in end 210 is positioned at a protruding position, and the plug-in end 210 is plugged on an automobile charging pin interface to charge a battery pack. When a fault occurs or the battery pack is in a floating charge state for a long time, the plug-in end 210 is controlled to retract into the charging gun head 200 rapidly, so that the plug-in end 210 is separated from an automobile charging contact pin interface, the battery pack and the direct current charging pile are separated and tripped, namely a rapid gun jumping process is realized, and the effect of protecting the charging pile equipment and the battery pack from electricity safety is achieved.
Specifically, a containing cavity is formed in the charging gun head 200, an opening 280 communicated with the containing cavity is formed in the end of the charging gun head, the plugging end 210 is telescopically arranged in the opening 280, in a normal state, the plugging end 210 protrudes outwards from the opening 280 for a certain distance, so that the charging gun head is convenient to plug with a charging interface, when a fault occurs or a battery pack is in a floating charging state for a long time, the plugging end 210 is controlled to shrink inwards into the containing cavity, and the plugging end 210 is quickly separated from the automobile charging pin interface to trip.
The opening 280 extends in the axial direction by a certain distance, so that the plug-in end 210 stably stretches into the opening 280, and the periphery of the guide groove 281 is fitted and stretches into the opening 280. And a plurality of guide grooves 281 are axially formed on the inner side wall of the opening 280, the length of the guide grooves 281 is not less than the length of the conductive pins on the charging interface, so that the guide grooves 281 have a sufficient moving distance in the axial direction, and the conductive pins are separated from the plugging ends 210.
A plurality of guide protrusions 213 are correspondingly arranged on the peripheral side wall of the plugging end 210 in a protruding manner, and the guide protrusions 213 are limited to be movably arranged in the guide grooves 281, so that guiding is provided for axial movement of the plugging end 210.
The plugging end 210 is in a cylindrical structure, so that the plugging end 210 can be conveniently stretched in the opening 280, a through hole 220 is axially formed in the center of the cylindrical body of the plugging end 210 in a penetrating manner, the through hole 220 is circular or elliptical, and the through hole 220 is communicated with the accommodating cavity.
A plurality of first channels 221 are distributed on the periphery of the through hole 220, and the length direction of the first channels 221 is consistent with the axial direction of the plugging end 210. In this embodiment, three first channels 221 are symmetrically formed on the peripheries of the through holes 220 on the left and right sides, and the size of each first channel 221 can be adjusted according to the size of the contact pin on the charging interface of the automobile.
Wherein, at least one guide block 222 is disposed on the side wall of the through hole 220 on the left and right sides, and specifically, the guide block 222 is located on the side wall of the through hole 220 between two adjacent first channels 221.
Meanwhile, a pair of half-section bodies 230, 240 are movably disposed in the through hole 220, the half-section bodies are small half-cylinder structures with arc shapes, such as one third of cylinders, and the half-section bodies 230, 240 are symmetrically distributed on the left and right sides in the through hole 220. The outer peripheral sidewall of the half-section body 230 is matched with the left inner sidewall of the through hole 220, and the outer peripheral sidewall of the half-section body 240 is matched with the right inner sidewall of the through hole 220.
The outer periphery of the half-section body is provided with a plurality of second channels 231 corresponding to the first channels 221, when the outer peripheral side walls of the half-section body on two sides are attached to the left side wall and the right side wall of the through hole 220, the first channels 221 and the second channels 231 are in one-to-one correspondence, and the first channels 221 and the second channels 231 are in butt joint to form conductive plug holes 260 for plugging automobile charging pin interfaces. After the charging gun head 200 is inserted into the automobile charging interface, the plug pair on the charging interface is correspondingly inserted into the conductive plug hole 260 formed by splicing the first channel 221 and the second channel 231, so that the charging gun head and the charging interface are in conductive connection, and the battery pack is charged.
A guiding hole corresponding to the guiding block 222 is formed on the peripheral sidewall of the half-section body, the guiding block 222 is movably inserted into the guiding hole, so that the half-section body is radially telescopic and arranged in the through hole 220, and the first channel 221 and the second channel 231 are controlled to be in butt joint or separation, that is, the diameter of the conductive inserting hole 260 is controlled, and when the first channel 221 and the second channel 231 are in butt joint, the conductive inserting hole 260 is closed, so that the conductive inserting hole 260 and the conductive inserting needle keep a fastened conductive state; when the first channel 221 is separated from the second channel 231, the conductive plug hole 260 is expanded, and the conductive pin can be released from the conductive plug hole 260, so that the conductive pin can be conveniently pulled away from the conductive plug hole 260, the charging gun head 200 can jump gun and quickly separate from the charging interface, and the safety of the charging pile body 100 and the vehicle-mounted battery pack is protected.
Due to the guiding action of the guide block 222 and the guide hole, the half-section bodies 230 and 240 at two sides can only stretch in the radial direction, the axial position is fixed, and the connection looseness of the conductive pins caused by the axial displacement of the half-section bodies 230 and 240 when the charging gun head is in butt joint with the charging interface is avoided.
In this embodiment, the outer periphery of the first channel 221 is provided with a conductive layer, that is, the first channel 221 is a conductive channel, and the outer periphery of the second channel 231 may also be provided with a conductive layer, so as to be in conductive contact with the conductive pins and the conductive plug holes 260, and the plug ends 210 and the half-section body are both insulators, so as to enhance the insulation performance.
The inner side end of the first channel 221 extends into the accommodating cavity, and the extending end of the first channel 221 is externally connected with a conductive connection wire, which is connected with the output end of the charging pile body 100 along the charging gun head 200, and each conductive plugging hole 260 is connected to the corresponding contact end of the charging pile body 100 through a corresponding conductive connection wire, so as to realize conductive connection between the charging gun head 200 and the charging pile body 100.
The inner side wall of the through hole 220 is in an arc surface structure, the conductive plug holes 260 on the charging gun head 200 are distributed along the outer side wall of the through hole 220, and correspondingly, the outer side wall of the half section is provided with an arc surface structure matched with the left side wall and the right side wall of the through hole 220, and the outer side wall of the half section is selectively attached to the inner side wall of the through hole 220 through radial movement of the half section body.
Specifically, the first channel 221 and the second channel 231 are in a semicircular structure, one half of each conductive plugging hole 260, that is, the first channel 221, is disposed on the sidewall of the through hole 220, the other half, that is, the second channel 231, is disposed on the outer peripheral sidewall of the half-section, and when the outer peripheral sidewall of the half-section is attached to the outer peripheral sidewall of the through hole 220, the first channel 221 and the second channel 231 are in one-to-one correspondence, so that the first channel 221 and the second channel 231 are spliced to form a plurality of complete conductive through holes 260, and the inner diameter of the conductive through holes 260 has a telescopic function.
The cross section direction of the half-section body is parallel to the axial direction of the plugging end 210, and a reserved gap is arranged between the cross sections of the half-section body on the left side and the right side, so that the half-section body stretches in the radial direction. And the maximum distance of the clearance does not exceed the diameter of the first channel 221, that is, the inner diameter of the conductive via 260, to limit the moving distance of the half-section body.
Correspondingly, the half-section body is sleeved on the guide block 222 through the guide hole, so that the half-section body can only radially stretch in the left-right direction. And the length of the guide block 222 and the depth of the guide hole are not smaller than the radius of the first channel 221, and since the reserved gap between the cross sections of the half-section bodies at the left side and the right side does not exceed the diameter of the first channel 221 and the half-section bodies at the left side and the right side synchronously move radially, the maximum moving distance of the single half-section body does not exceed the radius of the first channel 221, thereby ensuring that the guide block 222 is always limited in the guide hole in the radial moving process of the half-section body, providing guide for the radial movement of the half-section body and simultaneously ensuring the synchronous axial movement of the half-section body and the plugging end.
In this embodiment, a first spring 223 is disposed on the side wall of the through hole 220 on one side of the guide block 222 in a protruding manner, the first spring 223 is sandwiched between the side wall of the through hole 220 and the side wall of the outer periphery of the half-section body, specifically, a positioning cavity may be formed on the corresponding positions of the side wall of the through hole 220 and the side wall of the outer periphery of the half-section body, the first spring 223 is limited to be contracted in the positioning cavities on both sides, and the length of the first spring 223 is not less than the depth of the positioning cavities on both sides, so that the first spring 223 can push the half-section body to move radially inwards, and meanwhile, when the half-section body is attached to the side wall of the through hole 220, the first spring 223 can be accommodated in the positioning cavities on both sides, thereby avoiding the obstruction of the attachment of the half-section body to the side wall of the through hole 220.
Thus, in a normal state, the half-section bodies 230 and 240 on the left and right sides are driven to move inward simultaneously by the action of the first spring 223, the outer circumferential side walls of the half-section bodies 230 and 240 on the left and right sides are separated from the left and right side walls of the through hole 220, that is, the conductive through hole 260 is opened, and the conductive pins are released from the conductive through hole 260. When the outer peripheral side walls of the half-section bodies 230 and 240 are required to be attached to the left and right side walls of the through hole 220, the half-section bodies 230 and 240 on both sides are required to be pushed to move radially outward synchronously to compress the first spring 223 until the first channel 221 and the second channel 231 are abutted.
When a fault occurs, in order to enable the charging gun head 200 to realize automatic gun jumping, the charging gun head 200 is quickly separated from a charging interface to realize quick power failure so as to protect the charging pile body 100, a vehicle-mounted battery pack and peripheral electronic equipment, the invention drives the plug-in end 210 to quickly move to the inner side end until the plug-in end is contracted into the accommodating cavity, and the conductive contact pin is forcibly pulled away from the plug-in end 210 to realize gun jumping. Meanwhile, in order to assist and accelerate the gun jump process, a limiting block 2211 is arranged at the inner side end of the first channel 221, a second spring 2212 is arranged in the first channel 221 at the outer side of the limiting block 2211, and the length of the second spring 2212 does not exceed one third of the length of the first channel 221, so that the influence on the insertion depth of the conductive pin is avoided.
When the charging gun head 200 is plugged into the charging interface to charge the vehicle-mounted battery pack, the conductive pins extend into the conductive through holes 260 to be in conductive contact with the vehicle-mounted battery pack, and the conductive pins compress the second springs 2212 along with the increase of the insertion depth. Since the conductive pin is in a tight fit with the conductive via 260 at this time, the second spring 2212 is also insufficient to eject the conductive pin from the conductive via 260; in order to ensure that the conductive pins are kept in the conductive through holes 260, an automatic lock catch can be arranged at the connection part of the charging gun head 200 and the charging interface, and after the conductive pins are connected in place with the conductive through holes 260, the charging gun head 200 is connected and locked with the charging interface through the automatic lock catch, and when the gun is jumped, the automatic lock catch is controlled to be tripped.
When a malfunction occurs or the battery pack is in a floating state for a long time, the half-section bodies 230 and 240 on the left and right sides are controlled to be simultaneously released from the left and right side walls of the through-hole 220, that is, the half-section bodies 230 and 240 on the both sides are simultaneously moved inward by the urging of the first spring 223, the outer circumferential side walls of the half-section bodies 230 and 240 on the left and right sides are separated from the left and right side walls of the through-hole 220, that is, the conductive through-hole 260 is opened, and the conductive pins are released from the conductive through-hole 260.
The plug end 210 is driven to move towards the inner side end rapidly, so that the conductive contact pin is forcedly pulled away from the plug end 210, and the jump gun is realized. In this process, the conductive pins are ejected under the pushing of the second spring 2212, that is, the charging gun head 200 is ejected, to assist and accelerate the gun jumping process, and to cut off the power supply, thereby avoiding damaging the device. After the gun jump, the half-section bodies 230 and 240 are controlled to reset, and the half-section bodies are kept attached to the left and right side walls of the through hole 220, so that the integrity of the conductive through hole 260 is ensured, and the first spring 223 is compressed again.
In order to achieve radial movement of the left and right half sections 230 and 240, the present invention is modified as follows:
firstly, a half conical concave cavity 232 is axially formed in the cross section of the half cross section body, the inner diameter of the half conical concave cavity 232 gradually increases towards the inner side end, the inner side end of the half conical concave cavity 232 is communicated with the accommodating cavity, and the half conical concave cavities 232 on two sides can correspondingly form a conical cavity.
A tapered cylinder 250 is telescopically disposed in the half-tapered concave cavities 232 on the left and right sides, that is, the tapered cylinder 250 is telescopically disposed in a tapered cavity formed between the half-tapered concave cavities 232 on the two sides, the diameter of the tapered cylinder 250 gradually increases towards the inner side, and the outer surface of the tapered cylinder 250 is selectively attached to the half-tapered concave cavities 232.
Specifically, a telescopic mechanism 270 is disposed in the accommodating cavity, a telescopic end of the telescopic mechanism 270 is connected with a center of an inner side end of the tapered cylinder 250, and a telescopic direction of the telescopic mechanism 270 is consistent with a center axis of the plugging end 210. The axial position of tapered cylinder 250 may be controlled by telescoping mechanism 270 to control the radial position of half sections 230 and 240.
In order to realize the axial movement of the plugging end 210 to control the gun jump process, the invention is improved as follows:
a pair of channels 212 are axially and symmetrically arranged at the inner side end of the insertion end, specifically, the channels 212 are symmetrically arranged at the left side and the right side of the axial center of the insertion end 210, the channels 212 are axially arranged at the insertion end 210 at the outer side of the first channel 221, that is to say, the length direction of the channels 212 is parallel to the length direction of the through holes 220, the inner side end of the channels 212 is open and communicated with the accommodating cavity, a limiting cavity 213 is arranged at the outer side end of the channels 212, the limiting cavity 213 is completely accommodated inside the insertion end, and the inner diameter of the limiting cavity 213 is larger than that of the channels 212.
A pair of branch linkage rods 272 are symmetrically arranged at the left and right sides of the telescopic end 271 of the telescopic mechanism 270, the branch linkage rods 272 and the telescopic end 271 move in parallel and synchronously, and the distance between the branch linkage rods 272 and the telescopic end 271 is consistent with the distance between the cavity 212 and the axial center of the through hole 220.
A linkage head 273 is arranged at the end of the branched linkage rod 272 in a protruding manner, the diameter of the linkage head 273 is between the inner diameter of the limiting cavity 213 and the inner diameter of the cavity 212, the branched linkage rod 272 is arranged in the cavity 212 in a telescopic manner, and the linkage head 273 is limited to move in the limiting cavity 213.
Meanwhile, the end of the telescopic end 271 protrudes outwards beyond the linkage head 273 by a certain distance, so as to ensure that the end of the telescopic end 271 can extend into the semi-conical concave cavity 232 to be connected with the conical column 250.
Therefore, when the telescopic mechanism 270 pulls the conical column 250 to move axially, the linkage head 273 is limited in the limiting cavity 213, so that the plugging end 210 can be driven to move axially in the opening 280, separation of the plugging end 210 and the conductive pin is realized, and a gun jumping process is realized. Since the half-section bodies 230 and 240 are connected to the socket end 210 through the guide block 222, the half-section bodies 230 and 240 on both sides are driven to move axially in synchronization with the axial movement of the socket end 210.
The width of the limiting cavity 213 is greater than the width of the linkage head 273, in a normal state, the linkage head 273 is abutted against the outer side wall of the front end of the limiting cavity 213, so that the half-section body is abutted against the plugging end 210, when the gun is jumped, the telescopic mechanism 270 is controlled to pull the tapered cylinder 250 inwards, at the initial stage of the axial movement of the linkage head 273 inwards, the periphery of the tapered cylinder 250 is separated from the half-tapered concave cavity 232, under the driving of the first spring, the half-section bodies 230 and 240 synchronously move inwards, the half-section body is separated from the inner side wall of the through hole, the conductive plugging hole 260 is loosened until the linkage head 273 moves to abut against the inner side wall of the limiting cavity 213, and then, along with the continued axial movement of the telescopic end 271, the tapered cylinder 250 and the plugging end 210 are driven to synchronously move axially, the axial movement of the half-section bodies 230 and 240 is driven, the plugging end 210 is axially moved in the opening 280, the quick separation and tripping of the plugging end 210 and the conductive pin are realized, and the gun is jumped.
That is, 2 actions are continuously implemented in the process of gun jump, the first action is the relative movement of the linkage head 273 in the limiting cavity 213, in this process, only the conical cylinder 250 moves axially, so that the conical cylinder 250 is released from the half-section bodies 230 and 240, and under the action of the first spring, the half-section bodies 230 and 240 are driven to move radially, so that the half-section bodies 230 and 240 are released from the side walls of the through holes, and the conductive plug holes 260 are opened; the second action is that the linkage head 273 pulls the plug end and the half-section bodies 230 and 240 to axially move, and simultaneously, the telescopic end 271 synchronously pulls the conical cylinder 250 to axially move, in the process, the conical cylinder 250 starts to axially move synchronously with the plug end and the half-section bodies 230 and 240 until the plug end 210 is completely separated from the contact pin, so that the jump gun is realized.
In order to fix the position of the plugging terminal 210 in the normal state, so as to avoid the movement of the plugging terminal 210 during the conductive plugging process, the present invention is modified as follows:
a coil-wound iron core 291 is arranged in the gun head casing outside the opening 280, a magnet 293 is arranged at intervals at the inner axial end of the iron core 291, a third spring 292 is arranged between the first end of the magnet 293 and the iron core 291, and the magnet 293 is controlled by the coil to radially stretch out and draw back on the opening 280; the outer peripheral wall of the plugging end is correspondingly provided with a locking cavity 211, and the second end of the magnet 293 is telescopically arranged in the locking cavity 211. In a normal state, the plug end 210 is convexly arranged at the end of the charging gun head 200, and the second end of the magnet 293 is locked in the locking cavity 211, so that the axial position of the plug end 210 is fixed. When the jump gun occurs, the control coil is electrified, the attraction magnet 293 compresses the spring to move outwards, and the second end of the magnet 293 is separated from the limit of the locking cavity 211, so that the plug-in end 210 can be driven to move axially.
The working process is as follows:
in a normal state, the plug end 210 protrudes from the end of the charging gun head 200, the second end of the magnet 293 is locked in the locking cavity 211, the telescopic end of the telescopic mechanism 270 is controlled to be kept at a front side position, the conical cylinder 250 is driven to axially move to a position close to the front side, the outer side surface of the conical cylinder 250 is contacted with the inner side walls of the semi-conical concave cavities 232 on the left side and the right side, and the semi-section bodies 230 and 240 on the left side and the right side are pushed to move outwards along the radial direction along with the axially forward movement of the conical cylinder 250, the first spring 223 is compressed until the outer peripheral side walls of the semi-section bodies 230 and 240 on the left side and the right side are attached to the left side and the right side walls of the through hole 220, and the complete conductive through hole 260 is formed. At this time, the link head 273 moves to collide with the outer side wall of the limiting chamber 213. When the vehicle-mounted battery pack is charged, the charging gun head 200 is inserted into the vehicle-mounted charging connector, the conductive pins extend into the conductive through holes 260 to be in conductive contact with the vehicle-mounted charging connector, and the conductive pins compress the second springs 2212 along with the increase of the insertion depth. Because the conductive contact pin and the conductive through hole 260 are in a tight fit state at this time, the connection between the battery pack and the direct current charging pile is realized, and then the battery pack can be charged until the charging is completed.
When a fault occurs, specifically, an electrical signal on the charging pile is monitored in real time, and the telescopic mechanism 270 and the magnet 293 are triggered to act through overcurrent or overvoltage when the fault occurs. When the battery pack is in the float state for a long time, the time after the battery pack is charged is calculated, and when the time exceeds the set time, the telescopic mechanism 270 and the magnet 293 are triggered to operate.
Specifically, the trigger magnet 293 moves outwards, so that the second end of the magnet 293 is separated from the restriction of the locking cavity 211, and at the same time, the telescopic end of the trigger telescopic mechanism 270 moves backwards, at this time, the outer side surface of the tapered cylinder 250 is rapidly separated from the inner side walls of the half tapered concave cavities 232 on the left and right sides, the half section bodies 230 and 240 on the left and right sides synchronously move inwards under the pushing of the first spring 223, the outer peripheral side walls of the half section bodies 230 and 240 on the left and right sides are separated from the left and right side walls of the through hole 220, and finally, the half section bodies 230 and 240 on the left and right sides synchronously release from the left and right side walls of the through hole 220, that is, the conductive through hole 260 is opened, and the conductive contact pin and the conductive through hole 260 release.
With the continued axial movement of the tapered cylinder 250, the linkage head 273 moves to abut against the inner side wall of the limiting cavity 213, and then with the continued axial movement of the telescopic end 271, the tapered cylinder 250 and the plugging end 210 are driven to move axially synchronously, the half-section bodies 230 and 240 are driven to move axially, the plugging end 210 is driven to move axially in the opening 280, the plugging end 210 and the conductive pin are separated and tripped quickly, and the gun jumping process is realized. In this process, under the auxiliary pushing of the second spring 2212, the ejection process of the conductive pin is accelerated, that is, the charging gun head 200 is ejected, so as to realize gun jump, cut off the power supply, and avoid damaging the equipment. After the gun is jumped, the plugging end 210 is controlled to reset, the half-section bodies 230 and 240 are driven to reset, the half-section bodies are kept attached to the left side wall and the right side wall of the through hole 220, the integrity of the conductive through hole 260 is guaranteed, and the first spring 223 is compressed again. In the process, the tapered cylinder 250 is reset and the interlock head 273 moves to abut against the inner side wall of the limiting chamber 213.
By the aid of the mechanical isolation protection mechanism arranged between the charging pile and the vehicle-mounted charging connector, safety protection performance of the direct-current charging pile is improved; meanwhile, when overcurrent or overvoltage occurs, the battery pack and the charging pile can be separated through the gun jumping mechanism, so that an effective protection effect is achieved, the electricity utilization guaranteeing function of the charging pile is improved, the mechanical fault of charging is removed, and the reliability of equipment protection is improved; meanwhile, the overcurrent and overvoltage prevention and lightning protection performances of the charging pile are improved, and the damage of electronic components and vehicle-mounted battery packs in the charging pile is avoided; further, after the vehicle-mounted battery pack is charged, the battery can be separated from the charging pile through the gun jumping mechanism, so that the battery pack is prevented from being in a floating charge state for a long time, and the service life of the battery pack is prolonged.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein without departing from the general concepts defined in the claims and their equivalents.
Claims (8)
1. The utility model provides a direct current fills electric pile of interface automatic trip protection charges which characterized in that includes:
the input end of the charging pile body is connected with a three-phase power supply;
the charging gun head is connected with the output end of the charging pile body, a cylindrical inserting end is axially arranged on the end head of the charging gun head in a telescopic mode, a through hole is axially formed in the center of the cylinder of the inserting end in a penetrating mode, a plurality of first channels are distributed on the periphery of the through hole, and the length direction of each first channel is consistent with the axial direction of the inserting end; a pair of half-section bodies are radially arranged in the through hole in a telescopic manner, the half-section bodies and the plug-in ends axially move synchronously, the peripheral side wall of the half-section bodies is matched with the left inner side wall or the right inner side wall of the through hole, a plurality of second channels corresponding to the first channels are distributed on the periphery of the half-section bodies, and when the peripheral side wall of the half-section bodies is attached to the left side wall and the right side wall of the through hole, the first channels are in butt joint with the second channels to form conductive plug-in holes for plugging in automobile charging pin interfaces;
a half conical concave cavity is formed in the cross section of the half cross section body along the axial direction, the inner diameter of the half conical concave cavity is gradually increased towards the inner side end, a conical column body is telescopically arranged in the half conical concave cavity on the left side and the right side, the diameter of the conical column body is gradually increased towards the inner side end, and the outer surface of the conical column body is selectively attached to the half conical concave cavity;
a pair of cavity channels are axially and symmetrically arranged on the inner side end of the insertion end, the length direction of each cavity channel is parallel to the length direction of the through hole, the inner side end of each cavity channel is open, a limiting cavity is formed in the insertion end at the outer side end of each cavity channel, and the inner diameter of each limiting cavity is larger than that of each cavity channel; the inner side end of the conical cylinder is connected with the telescopic end of a telescopic mechanism, two sides of the telescopic end are symmetrically provided with a pair of branch linkage rods, the branch linkage rods and the telescopic end move in parallel and synchronously, the end heads of the branch linkage rods are convexly provided with a linkage head, the diameter of the linkage head is between the inner diameter of the limiting cavity and the inner diameter of the cavity channel, the linkage head is limited to move in the limiting cavity, and the width of the limiting cavity is larger than that of the linkage head;
the charging gun head is internally provided with a containing cavity, the through hole is communicated with the containing cavity, the periphery of the first channel is provided with a conducting layer, the plug-in end and the half-section body are insulators, the inner side end of the first channel extends into the containing cavity, the extending end of the first channel is externally connected with a conducting connecting wire, and the conducting connecting wire is connected with the output end of the charging pile body along the charging gun head;
the inner side wall of the through hole is of an arc surface structure, the conductive plug holes on the charging gun head are distributed along the outer side wall of the through hole, the outer side wall of the half-section body is provided with an arc surface structure matched with the left side wall and the right side wall of the through hole, and the outer side wall of the half-section body is selectively attached to the inner side wall of the through hole; the first channel and the second channel are in a semicircular structure, and the first channel corresponds to the second channel one by one.
2. The direct current charging pile with the automatic tripping protection of the charging interface according to claim 1, wherein the cross section direction of the half-section body is parallel to the axial direction of the plug-in end, a reserved gap is arranged between the cross sections of the half-section bodies at the left side and the right side, and the maximum distance of the reserved gap does not exceed the diameter of the first channel.
3. The direct current charging pile with the automatic tripping protection of the charging interface according to claim 1, wherein at least one guide block is arranged on the side wall of the through hole on the left side and the right side in a protruding way respectively, and the guide blocks are positioned on the side wall of the through hole between two adjacent first channels; the outer peripheral side wall of the half-section body is provided with a guide hole corresponding to the guide block, and the guide block is inserted into the guide hole;
the length of the guide block and the depth of the guide hole are not smaller than the radius of the first channel, and the half-section body is sleeved on the guide block through the guide hole, so that the half-section body is radially telescopic in the left-right direction.
4. The direct current charging pile for automatic tripping protection of charging interface as defined in claim 3, wherein a first spring is arranged on the side wall of the through hole on one side of the guide block in a protruding manner, and the first spring is clamped between the side wall of the through hole and the side wall of the outer periphery of the half-section body.
5. The direct current charging pile for automatic tripping protection of a charging interface according to claim 1, wherein a limiting block is arranged at the inner side end of the first channel, a second spring is arranged in the first channel at the outer side of the limiting block, and the length of the second spring is not more than one third of the length of the first channel.
6. The direct current charging pile with the automatic tripping protection of the charging interface according to claim 1, wherein an opening communicated with the accommodating cavity is formed in the end head of the charging gun head, the inserting end is telescopically arranged in the opening, the opening extends a certain distance in the axial direction, a plurality of guide grooves are axially formed in the inner side wall of the opening, a plurality of guide protrusions are correspondingly arranged on the outer side wall of the inserting end in a protruding mode, and the guide protrusions are movably arranged in the guide grooves.
7. The direct current charging pile with the automatic tripping protection of the charging interface according to claim 1, wherein the inner side end of the semi-conical concave cavity is communicated with the accommodating cavity, the telescopic mechanism is arranged in the accommodating cavity, the end head of the telescopic end of the telescopic mechanism is connected with the center of the inner side end of the conical column body, and the telescopic direction of the telescopic mechanism is consistent with the center axis of the inserting end.
8. The direct current charging pile with the automatic tripping protection function for the charging interface according to claim 7, wherein the cavity is symmetrically arranged on the left side and the right side of the center of the shaft of the plug-in end, the linkage heads are correspondingly arranged on the left side and the right side of the telescopic end, the branch linkage rod is arranged in the cavity in a telescopic manner, and the end head of the telescopic end protrudes outwards from the linkage heads by a certain distance.
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| CN201811117676.3A CN109177756B (en) | 2018-09-21 | 2018-09-21 | Direct-current charging pile with automatic tripping protection of charging interface |
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| CN201811117676.3A CN109177756B (en) | 2018-09-21 | 2018-09-21 | Direct-current charging pile with automatic tripping protection of charging interface |
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| CN109177756B true CN109177756B (en) | 2023-10-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109910653B (en) * | 2019-04-02 | 2023-08-25 | 吉林大学 | Charging system for pure electric vehicle |
| CN112688124A (en) * | 2020-12-15 | 2021-04-20 | 芜湖享奕自动化科技有限公司 | Charging gun and charging pile with same |
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