CN210792828U - Charging gun and charging system - Google Patents
Charging gun and charging system Download PDFInfo
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- CN210792828U CN210792828U CN201921437274.1U CN201921437274U CN210792828U CN 210792828 U CN210792828 U CN 210792828U CN 201921437274 U CN201921437274 U CN 201921437274U CN 210792828 U CN210792828 U CN 210792828U
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- 238000005070 sampling Methods 0.000 claims abstract description 97
- 238000012545 processing Methods 0.000 claims abstract description 33
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000009413 insulation Methods 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 11
- 210000005056 cell body Anatomy 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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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 utility model provides a charging gun and a charging system, wherein the charging gun comprises a direct current charging body, a sampling device and a processing unit; the two direct current charging bodies are provided with detection holes and used for providing a first voltage value between the two direct current charging bodies and a current value flowing through the two direct current charging bodies; the elastic sampling device is provided with a sampling component, is arranged on the direct current charging body, is in insulated connection with the direct current charging body, and is used for detecting a second voltage value between the two charging groove body inner walls which are respectively butted with the two direct current charging bodies; and the processing unit is electrically connected with the direct current charging body and the sampling device and used for calculating and outputting the resistance value of the contact resistor according to the first voltage value, the second voltage value and the current value. The charging gun feeds back a first voltage value and a current value to the processing unit through the direct-current charging body, feeds back a second voltage value to the processing unit through the sampling device, and the processing unit receives and calculates the resistance value of the contact resistor according to the first voltage value, the second voltage value and the current value.
Description
Technical Field
The utility model belongs to the technical field of the computer, especially, relate to a rifle and charging system charge.
Background
With the increasing requirements of the society on environmental protection and energy conservation and the limited nature of petroleum resources, new energy automobiles are more and more emphasized by governments and people, and electric automobiles develop rapidly. The electric automobile is driven by a battery, power is converted from electric energy in the battery, the electric quantity of the battery can directly influence the performance of the endurance mileage, the speed and the like, and the battery charging is a crucial link for new energy automobiles.
After charging many times or use the wearing and tearing that can lead to charging base in the charging process nonstandard, cause the contact site resistance grow between rifle and the charging base that charges, at present, traditional rifle that charges lacks contact resistance's effective detection, very easily causes overheated in charging process, leads to incident such as on fire.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a rifle and charging system charge, aim at solving the rifle that charges that exists among the traditional technical scheme and do not possess the problem that contact resistance detected.
In a first aspect, an embodiment of the present disclosure provides a charging gun, which includes a dc charging body, a sampling device, and a processing unit; the two direct current charging bodies are provided with detection holes and used for providing a first voltage value between the two direct current charging bodies and a current value flowing through the two direct current charging bodies; the elastic sampling device is provided with a sampling component, is arranged on the direct current charging bodies, is in insulated connection with the direct current charging bodies, and is used for detecting a second voltage value between two charging groove body inner walls which are respectively butted with the two direct current charging bodies, wherein the sampling component extends out of the detection hole and is elastically abutted against the charging groove body inner walls; and the processing unit is electrically connected with the direct current charging body and the sampling device and used for calculating and outputting the resistance value of the contact resistor according to the first voltage value, the second voltage value and the current value.
With reference to the first aspect, in a first implementation manner of the first aspect, the dc charging body provided with the cavity includes an insulating portion located at a front end of the dc charging body and a conducting portion located at a rear end of the dc charging body, and the insulating portion is sleeved on the conducting portion.
With reference to the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the sampling device further includes an insulating housing having at least one first opening, and a first sampling cable used for transmitting a second voltage value, one end of the first sampling cable is connected to the sampling part, the other end of the first sampling cable is connected to the processing unit, the first opening is opposite to the detection hole, the sampling part embedded in the insulating housing is a conductive metal body folded to have an elastic protrusion, and the elastic protrusion extends out of the first opening and the detection hole and is exposed out of an outer surface of the insulating housing.
With reference to the first embodiment of the first aspect, in a third embodiment of the first aspect, the sampling device further includes a limiting insulating spring having an annular portion and a second sampling cable for transmitting a second voltage value, the detection hole is located on the insulating portion, the sampling component is a conductive cylinder having a positioning component, the positioning component is matched with the annular portion and used for limiting a stroke of the conductive cylinder, two ends of the limiting insulating spring are fixedly connected with an inner wall of the cavity, the conductive cylinder sequentially penetrates through the annular portion and the detection hole, a front end of the conductive cylinder protrudes outward from an outer surface of the insulating portion, a rear end of the conductive cylinder is connected with one end of the second sampling cable, and the other end of the second sampling cable is connected with the processing unit.
Combine the first embodiment of the first aspect, in the fourth embodiment of the first aspect, the sampling device still includes reset spring and the third sampling cable line that is used for transmitting the second voltage value, the direct current body that charges is provided with the cavity, the detection hole is two and symmetric distribution on the insulating part, the sampling part is equipped with first opening, reset spring is connected with first opening, the similar department of first opening is provided with the arc lug of two symmetries, two arc lugs are located two detection holes respectively, the sampling part is connected with the one end of third sampling cable line, the other end of third sampling cable line is connected with the processing unit, the sampling part is connected with the insulating fixed connection of the cavity inner wall of the direct current body that charges.
With reference to the second embodiment of the first aspect, in a fifth embodiment of the first aspect, the insulating housing is provided with a hollow portion, and the first opening communicates with the hollow portion.
With reference to the second embodiment of the first aspect, in a sixth embodiment of the first aspect, the insulating housing is disposed within a cavity, and the cavity is located on the conductive portion.
With reference to the third embodiment of the first aspect, in a seventh embodiment of the first aspect, the loop has at least two turns of a spring coil.
With reference to the third embodiment of the first aspect or the seventh embodiment of the first aspect, in an eighth embodiment of the first aspect, the positioning member is a positioning protrusion, the positioning protrusion is fixed to a surface of the conductive cylindrical body, and the positioning protrusion compresses the annular portion when the direct-current charging body is butted against the charging slot body.
In a second aspect, the embodiment of the present disclosure provides a charging system, which includes a charging pile controller, wherein the charging pile controller receives a resistance of the contact resistor, compares the resistance of the contact resistor with a preset resistance in the charging pile controller, and controls the charging gun in the above embodiment to stop charging when the resistance of the contact resistor is greater than the preset resistance.
The charging gun feeds back a first voltage value and a current value to the processing unit through the direct-current charging body, feeds back a second voltage value to the processing unit through the sampling device, and the processing unit receives and calculates the resistance of the contact resistor according to the first voltage value, the second voltage value and the current value and provides the resistance output of the contact resistor, so that the problem that the charging gun does not have the real-time detection of the contact resistor in the traditional technical scheme is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
FIG. 1 is a schematic structural diagram of an output port of a standard DC charging gun;
FIG. 2 is a schematic structural diagram of a charging slot of a conventional vehicle charging dock;
fig. 3 is a schematic structural view of a dc charging body in a conventional charging gun;
fig. 4 is a schematic structural diagram of a charging gun according to an embodiment of the present disclosure;
FIG. 5 is a schematic circuit diagram of an equivalent circuit of the contact resistance shown in FIG. 5;
FIG. 6 is a schematic structural diagram of the DC charger and the sampling device shown in FIG. 5;
FIG. 7 is a schematic diagram of the sampling device shown in FIG. 7;
FIG. 8 is a second schematic structural diagram of the DC charger and the sampling device shown in FIG. 5;
fig. 9 is a third schematic structural diagram of the dc charger and the sampling device shown in fig. 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
FIG. 1 is a schematic diagram showing the structure of an output port of a standard DC charging gun, wherein PE is used for connecting a ground wire; the DC + and the DE-are used for connecting a direct current power line and outputting a direct current power supply required by charging the battery of the electric automobile; s + and S-are communication lines; a + and A-are low-voltage auxiliary lines; CC1 and CC2 are charging connection confirmation lines.
Fig. 2 shows a charging slot in a conventional vehicle-mounted charging stand for receiving a charging power from DC power supply lines DC + and DE-outputs in a charging gun.
Fig. 3 is a schematic diagram showing a structure of a DC charging body 100 in a conventional charging gun, in which DC power lines DC + and DE-are connected to two DC charging bodies 100, respectively.
The charging slot body in the vehicle-mounted charging seat is matched with the direct current charging body 100 in the charging gun, the direct current charging body 100 in the charging gun is inserted into the charging slot body in the vehicle-mounted charging seat, and a contact resistor R exists between the charging slot body and the direct current charging body 100; the resistance of the contact resistor R is related to the contact surface condition between the two, and generally, after charging or using for many times, the contact surface matching condition between the two is worse and worse, which results in the resistance of the contact resistor R becoming larger.
Fig. 4 shows a schematic structural diagram of a charging gun provided in an embodiment of the present disclosure, and for convenience of description, only the parts related to the embodiment are shown, which are detailed as follows:
a charging gun comprises a direct current charging body 100, a sampling device 200 and a processing unit 300; the two direct current charging bodies are provided with detection holes and used for providing a first voltage value between the two direct current charging bodies and a current value flowing through the two direct current charging bodies; the elastic sampling device is provided with a sampling component, is arranged on the direct current charging bodies, is in insulated connection with the direct current charging bodies, and is used for detecting a second voltage value between two charging groove body inner walls which are respectively butted with the two direct current charging bodies, wherein the sampling component extends out of the detection hole and is elastically abutted against the charging groove body inner walls; and the processing unit is electrically connected with the direct current charging body and the sampling device and used for calculating and outputting the resistance value of the contact resistor according to the first voltage value, the second voltage value and the current value.
Specifically, the connection points between the DC power lines DC + and DC-and the two DC chargers 100 may be set as the first voltage value V1 and the sampling point of the current value I, respectively, where the first voltage value V1 is the difference between the voltage value of the sampling point of the DC charger 100 connected to the DC power line DC + and the voltage value of the sampling point of the DC charger 100 connected to the DC power line DC-, and the voltage values V1+ and V1-of the two sampling points are fed back to the processing unit 300, respectively; the current value I is the magnitude of current flowing through a loop formed by the two dc charging bodies 100 and the contact resistor R; the current value I is fed back to the processing unit 300 through a separate loop between the sampling point and the processing unit 300, which is composed of a cable. The second voltage value V2 is the difference between the voltage values V2+ and V2-of the two charging slots detected by the corresponding sampling devices 200 provided on the two dc charging bodies 100, and then the detected voltage values V2+ and V2-are separately fed back to the processing unit 300, respectively.
As shown in fig. 5, when the charging gun is plugged into the charging stand 400 for charging, the contact surface between the charging gun and the charging stand will generate impedance, and the contact resistance R between the two dc charging bodies 100 and the two charging slots can be equivalent to a first resistance R1 and a second resistance R2; then, according to the circuit schematic shown in fig. 5, the following processing is performed:
step one, calculating the voltage between two ends of the first resistor R1:
VR1＝V1+-V2+
step two, calculating the voltage between two ends of the second resistor R2:
VR2＝V2_-V1-
step three, calculating a first voltage:
V1＝V1+-V1-
step four, calculating a second voltage:
V2＝V2+-V2_
step five, calculating the voltage at two ends of the contact resistor R:
V1-V2＝VR1+VR2＝(V1+-V2+)-(V1_-V2-)
step six, dividing the sum of the voltage across the first resistor R1 and the voltage across the second resistor R2 in the step five by the current value to obtain the resistance value of the contact resistor R:
the above steps are not sequential, and the output end of the processing unit 300 is used for outputting the resistance value of the contact resistor R.
When charging, with direct current charging body 100 pegging graft in charging the cell body, at this moment, sampling device 200's elastic component receives the extrusion of charging the cell body, and the sampling component 210 that is located in detecting hole 110 receives sampling device 200's drive, makes sampling component 210 and the inner wall of charging the cell body contact closely steadily to sampling component 210 can detect the voltage of this contact department, and feed back to processing unit 300. The sampling device 200 and the corresponding dc charging body 100 need to be isolated from each other in terms of conductivity, so as to avoid mutual interference between voltages at different sampling points.
In one embodiment, the dc charging body 100 provided with the cavity includes an insulating portion 120 located at a front end of the dc charging body 100 and a conductive portion 130 located at a rear end of the dc charging body 100, and the insulating portion 120 is sleeved on the conductive portion 130.
Specifically, the front end of the insulating portion 120 is a cone, and when charging, the tip of the cone contacts the charging slot, and the rear end of the insulating portion 120 may be sleeved in the front end of the conductive portion 130.
In one embodiment, the insulating portion 120 is provided with an internal thread, the conductive portion 130 is provided with an external thread matching the internal thread, and the insulating portion 120 is screwed with the conductive portion 130.
Specifically, the insulating portion 120 and the conductive portion 130 may be connected by a screw, for example, the insulating portion 120 is provided with an internal screw, and the conductive portion 130 is provided with an external screw matching the internal screw, or vice versa; the connection can also be performed by a snap-fit manner, for example, the insulation portion 120 is provided with a first positioning device, and the conductive portion 130 is provided with a second positioning device matched with the first positioning device, where the first positioning device can be a positioning hole, and the second positioning device can be a positioning post. The insulation portion 120 and the conductive portion 130 are detachably connected thereto for facilitating the placement of the sampling device 200 on the dc charging body 100.
As shown in fig. 6 and 7, in one embodiment, the sampling device 200 further includes an insulating housing 220 having at least one first opening 2210, and a first sampling cable 230 for transmitting a second voltage value V2, one end of the first sampling cable 230 is connected to the sampling part 210, the other end of the first sampling cable 230 is connected to the processing unit 300, the sampling part 210 embedded in the insulating housing 220 is a conductive metal body folded into an elastic protrusion, and the elastic protrusion extends from the first opening 2210 and the detection hole 110 and is exposed to the outer surface of the insulating housing 220.
Specifically, the sampling device 200 uses the insulating housing 220 as a carrier, and is connected to the dc charging body 100 through the insulating housing 220, the dc charging body 100 is provided with a groove matching with the outer contour of the insulating housing 220, the insulating housing 220 is disposed in the groove, when charging is performed, the elastic protrusion protruding from the outer surface of the insulating housing 220 contacts with the inner wall of the charging slot through the first opening 2210 and the detection hole 110, because the elastic protrusion of the conductive metal body has elasticity, after being pressed by the inner wall of the charging slot, the elastic protrusion tightens into the first opening 2210 through the detection hole 110, and the first opening 2210 is used for providing a space required for deformation of the elastic protrusion 2210 when being pressed and deformed. The elastic protrusion may be, but is not limited to, an inverted V-shape. The conductive metal body may be, but is not limited to, a wire, a strip, or a column.
As shown in fig. 8, in one embodiment, the sampling device 200 further includes a position-limiting insulating spring 240 having a ring portion 2410 and a second sampling cable 250 for transmitting a second voltage value V2, the dc charging body 100 is provided with a cavity, the detection hole 110 is located on the insulating portion 120, the sampling member 210 is a conductive cylinder having a positioning member, the positioning member is matched with the ring portion 2410 and used for limiting the stroke of the conductive cylinder, two ends of the position-limiting insulating spring 240 are fixedly connected with an inner wall of the cavity, the conductive cylinder sequentially passes through the ring portion 2410 and the detection hole 110, a front end of the conductive cylinder protrudes outwards from an outer surface of the insulating portion 120, a rear end of the conductive cylinder is connected with one end of the second sampling cable 250, and the other end of the second sampling cable 250 is connected with the processing unit 300.
Specifically, the limiting insulation spring 240 is an insulation spring with limiting function, two ends of the limiting insulation spring are fixed on the inner wall of the cavity of the dc charging body 100, and the annular portion 2410 of the limiting insulation spring 240 surrounds and is clamped on the outer groove of the conductive cylinder, so that when the conductive cylinder is displaced, the limiting insulation spring 240 acts as a return force. When the conductive cylinder is extruded by the inner wall of the charging tank body, the conductive cylinder can shift in the cavity to drive the limiting insulating spring 240 to deform under stress, so that the conductive cylinder can reliably detect the voltage of the inner wall of the charging tank body. Also can set up the locating part on conductive cylinder, like the location is protruding, when conductive cylinder received the extrusion, the location is protruding to be blocked spacing insulating spring 240 and is prevented to break away from conductive cylinder, and spacing insulating spring 240 atress warp simultaneously, has the power of returning, can conveniently realize that conductive cylinder carries out voltage detection and self return when not charging.
As shown in fig. 9, in one embodiment, the sampling device 200 further includes a return spring 260 and a third sampling cable 270 for transmitting a second voltage value V2, the dc charging body 100 is provided with a cavity, two detection holes 110 are symmetrically distributed on the insulating portion 120, the sampling unit 210 is provided with a first opening, the return spring 260 is connected to the first opening, two symmetrical arc-shaped protrusions 2110 are disposed near the first opening, the two arc-shaped protrusions 2110 are respectively located in the two detection holes 110, the sampling unit 210 is connected to one end of the third sampling cable 270, the other end of the third sampling cable 270 is connected to the processing unit 300, and the sampling unit 210 is fixedly connected to an inner wall of the cavity of the dc charging body 100 in an insulating manner.
Specifically, the arc-shaped bump 2110 passes through and protrudes out of the outer surface of the detection hole 110, when the arc-shaped bump 2110 is extruded by the inner wall of the charging slot body, the arc-shaped bump 2110 contracts inwards, then the reset spring 260 at the first opening is driven to deform under stress, and at the moment, the reset spring 260 deformed under stress pushes the arc-shaped bump 2110 to the inner wall of the charging slot body, so that the contact is more sufficient and reliable during voltage sampling. The overall shape of the sampling device 200 may be, but is not limited to, a rectangle as shown in fig. 9, or a V-shape, and may also be formed by folding a conductive wire with elasticity, and then installing the return spring 260 at the first opening.
As shown in fig. 7, in one embodiment, the insulating housing 220 is provided with a hollow portion, and the first opening communicates with the hollow portion.
The insulating housing 220 may be, but is not limited to, a hollow rectangular body made of plastic, other insulating materials, or a shape body, and the hollow is provided to save materials and provide space for the sampling part 210 to deform into the first opening 2210.
In one embodiment, the insulating housing 220 is disposed within a cavity, which is located on the conductive portion 130. The shape and the volume of the insulating shell 220 are matched with the cavity, so that the insulating shell 220 can be directly placed in the cavity, and the disassembly is convenient.
In one embodiment, the conductive metal body is made of stainless steel.
In one embodiment, the loop 2410 has at least two turns of a spring coil. The ring portion 2410 also functions to limit the movement of the conductive cylinder in a predetermined direction so as not to touch the inner wall of the dc charging body 100, which may cause voltage measurement interference.
In one embodiment, the positioning member is a positioning protrusion fixed on the surface of the conductive cylinder, and the positioning protrusion compresses the annular portion 2410 when the dc charging body 100 is mated with the charging slot 400.
In one embodiment, the cavity extends through the insulating portion 120 and the conductive portion 130. Specifically, the area occupied by the cavity includes both the cavity of the insulating part 120 and the cavity of the conductive part 130 so as to be compatible with the position of the detection hole 110.
In one embodiment, the present disclosure provides a charging system, which includes a charging pile controller, where the charging pile controller receives a resistance value of a contact resistor R, compares the resistance value of the contact resistor R with a preset resistance value in the charging pile controller, and when the resistance value of the contact resistor R is greater than the preset resistance value, the charging pile controller controls a charging gun in the above embodiment to stop charging.
Specifically, the preset resistance value may be, but is not limited to, 200 milliohms. When the resistance value of the contact resistor R is greater than the preset resistance value, the charging pile controller may also control the charging gun in the above embodiment to stop charging or adjust the charging mode, such as an intermittent charging mode, or make an alarm sound such as a sound; the condition that the resistance value of the contact resistor R is larger than the preset resistance value can be fed back to the vehicle owner in a remote communication mode, so that the vehicle owner can take further security measures.
The charging gun feeds back a first voltage value V1 and a current value to the processing unit 300 through the direct current charging body 100, and feeds back a second voltage value V2 to the processing unit 300 through the sampling device 200, the processing unit 300 receives and calculates the resistance value of the contact resistor R according to the first voltage value V1, the second voltage value V2 and the current value, and provides the resistance value output of the contact resistor R, so that the problem that the charging gun does not have real-time detection of the contact resistor R in the traditional technical scheme is solved; on the other hand, the charging system compares the resistance value of the contact resistor R provided by the processing unit 300 with the preset resistance value in the charging pile controller, and the charging pile controller controls whether the charging gun is charged or not based on the comparison result of the resistance value of the contact resistor R and the preset resistance value, so that safety accidents such as fire and the like caused by too fast heating due to the fact that the resistance value of the contact resistor R is increased can be effectively prevented.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A charging gun, comprising:
the device comprises two direct current charging bodies provided with detection holes and used for providing a first voltage value between the two direct current charging bodies and a current value flowing through the two direct current charging bodies;
the elastic sampling device is provided with a sampling component, is arranged on the direct current charging body, is in insulated connection with the direct current charging body and is used for detecting a second voltage value between the two charging groove body inner walls which are respectively butted with the two direct current charging bodies,
the sampling component extends out of the detection hole and is elastically abutted against the inner wall of the charging groove body; and
and the processing unit is electrically connected with the direct current charging body and the sampling device and used for calculating and outputting the resistance value of the contact resistor according to the first voltage value, the second voltage value and the current value.
2. The charging gun according to claim 1, wherein the dc charging body provided with the cavity includes an insulating portion at a front end of the dc charging body and a conductive portion at a rear end of the dc charging body, and the insulating portion is fitted over the conductive portion.
3. The charging gun according to claim 2, wherein the sampling device further comprises an insulating housing having at least one first opening and a first sampling cable for transmitting the second voltage, one end of the first sampling cable is connected to the sampling member, the other end of the first sampling cable is connected to the processing unit, the first opening is opposite to the detection hole, the sampling member embedded in the insulating housing is a conductive metal body folded to have an elastic protrusion, and the elastic protrusion extends from the first opening and the detection hole and is exposed to an outer surface of the insulating housing.
4. The charging gun according to claim 2, wherein the sampling device further comprises a limiting insulation spring having a ring portion and a second sampling cable for transmitting the second voltage value, the detection hole is located on the insulation portion, the sampling component is a conductive cylinder having a positioning component, the positioning component is matched with the ring portion and used for limiting the stroke of the conductive cylinder, two ends of the limiting insulation spring are fixedly connected with the inner wall of the cavity, the conductive cylinder sequentially passes through the ring portion and the detection hole, the front end of the conductive cylinder protrudes outwards from the outer surface of the insulation portion, the rear end of the conductive cylinder is connected with one end of the second sampling cable, and the other end of the second sampling cable is connected with the processing unit.
5. The charging gun according to claim 2, wherein the sampling device further comprises a return spring and a third sampling cable for transmitting the second voltage value, the number of the detection holes is two, the detection holes are symmetrically distributed on the insulating portion, the sampling component is provided with a first opening, the return spring is connected with the first opening, two symmetrical arc-shaped protrusions are arranged close to the first opening, the two arc-shaped protrusions are respectively located in the two detection holes, the sampling component is connected with one end of the third sampling cable, the other end of the third sampling cable is connected with the processing unit, and the sampling component is fixedly connected with the inner wall of the cavity of the dc charging body in an insulating manner.
6. The charging gun according to claim 3, wherein the insulating housing is provided with a hollow portion, and the first opening communicates with the hollow portion.
7. The charging gun of claim 3, wherein the insulating housing is disposed within the cavity, the cavity being located on the conductive portion.
8. The charging gun of claim 4, wherein the loop has at least two turns of a spring coil.
9. The charging gun according to claim 4 or 8, wherein the positioning member is a positioning projection fixed to a surface of the conductive cylinder, and the positioning projection compresses the annular portion when the dc charging body is butted against the charging slot body.
10. A charging system comprising a charging pile controller, wherein the charging pile controller receives the resistance of the contact resistor and compares the resistance of the contact resistor with a preset resistance in the charging pile controller, and when the resistance of the contact resistor is greater than the preset resistance, the charging pile controller controls the charging gun according to any one of claims 1 to 9 to stop charging.
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| CN201921437274.1U CN210792828U (en) | 2019-08-29 | 2019-08-29 | Charging gun and charging system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921437274.1U CN210792828U (en) | 2019-08-29 | 2019-08-29 | Charging gun and charging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812533A (en) * | 2020-06-22 | 2020-10-23 | 深圳市瑞能时代科技有限公司 | Electric vehicle power battery detection system, method and device and upper computer |
| CN115489366A (en) * | 2022-10-10 | 2022-12-20 | 鸿洋集团有限公司 | Charging pile loss self-checking method and method for detecting charging port by using same |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812533A (en) * | 2020-06-22 | 2020-10-23 | 深圳市瑞能时代科技有限公司 | Electric vehicle power battery detection system, method and device and upper computer |
| CN115489366A (en) * | 2022-10-10 | 2022-12-20 | 鸿洋集团有限公司 | Charging pile loss self-checking method and method for detecting charging port by using same |
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