CN210309976U - Charging gun structure with voltage limiting protection function - Google Patents
Charging gun structure with voltage limiting protection function Download PDFInfo
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- CN210309976U CN210309976U CN201920677344.4U CN201920677344U CN210309976U CN 210309976 U CN210309976 U CN 210309976U CN 201920677344 U CN201920677344 U CN 201920677344U CN 210309976 U CN210309976 U CN 210309976U
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- Prior art keywords
- annular protection
- liquid metal
- annular
- charging gun
- protection tube
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- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 72
- 238000010438 heat treatment Methods 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 23
- 239000000110 cooling liquid Substances 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000002826 coolant Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
-
- 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
-
- 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
- Y02T90/12—Electric charging stations
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Abstract
The utility model discloses a charging gun structure with voltage limiting protection function, which comprises a first annular protection tube and a second annular protection tube, wherein liquid metal is respectively filled in the first annular protection tube and the second annular protection tube; the first annular protection pipe is connected with a first heat exchanger, the second annular protection pipe is connected with a second heat exchanger, a first pressure sensor is installed on the first annular protection pipe, and a second pressure sensor is installed on the second annular protection pipe; according to the charging gun structure with the pressure limiting protection function, the first withdrawing device and the second withdrawing device are utilized, and when the pressure value of the first pressure sensor is larger than a maximum preset value or smaller than a minimum preset value, the first withdrawing device withdraws liquid metal in the first annular protection pipe; when the pressure value of the second pressure sensor is larger than the maximum preset value or smaller than the minimum preset value, the second withdrawing device withdraws the liquid metal in the second annular protection pipe, and potential safety hazards caused by overlarge or undersize liquid metal pressure are avoided.
Description
Technical Field
The utility model belongs to the technical field of charge, especially, relate to a rifle structure charges of taking voltage limiting protect function.
Background
In a charging gun provided by the prior art, for example, a tesla charging gun, under a large current charging load, a large amount of heat is generated in an electric wire in the charging gun, and the temperature of the electric wire rises, thereby causing the charging efficiency to decrease. To solve this problem, tesla provides a solution: increase the cooling tube in the cable, the cooling tube intussuseption is filled with the coolant liquid, and the heat transfer that the electric wire produced carries out the heat transfer by coolant liquid circulation flow to heat exchanger and cools down to this cooling that realizes the electric wire.
A new charging gun structure using liquid metal for charging has appeared at present. However, when the pressure of the liquid metal is too high or too low during charging, a safety hazard is generated: when the pressure is too high, the risk of tube explosion exists; when the pressure is too small, there is a risk of leakage.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pair of take rifle structure that charges of voltage limiting protect function, according to the pressure size that detects liquid metal, control liquid metal withdraws to the potential safety hazard that produces when preventing too big or the undersize of pressure.
To achieve the purpose, the utility model adopts the following technical proposal:
a charging gun structure with a voltage limiting protection function comprises an insulating shell, wherein a first annular protection tube and a second annular protection tube are arranged in the insulating shell, and liquid metal is filled in the first annular protection tube and the second annular protection tube respectively;
the liquid metal in the first annular protection tube is electrically connected to the positive pole of a power supply, and the liquid metal in the second annular protection tube is electrically connected to the negative pole of the power supply;
the first annular protection pipe is connected with a first heat exchanger, and the first heat exchanger is used for cooling the liquid metal in the first annular protection pipe;
the second annular protection pipe is connected with a second heat exchanger, and the second heat exchanger is used for cooling the liquid metal in the second annular protection pipe;
a first pressure sensor is arranged on the first annular protection pipe, and a second pressure sensor is arranged on the second annular protection pipe;
the charging gun structure further comprises a first withdrawing device and a second withdrawing device, the first withdrawing device is communicated with the first annular protection tube, and the second withdrawing device is communicated with the second annular protection tube;
the first withdrawing device is electrically connected to the first pressure sensor, and the second withdrawing device is electrically connected to the second pressure sensor;
when the pressure value of the first pressure sensor is larger than a maximum preset value or smaller than a minimum preset value, triggering the first withdrawing device to withdraw the liquid metal in the first annular protection pipe;
and when the pressure value of the second pressure sensor is greater than a maximum preset value or less than a minimum preset value, triggering the second withdrawing device to withdraw the liquid metal in the second annular protection pipe.
Optionally, a cooling liquid circulates through the primary side of the first heat exchanger, and the liquid metal in the first annular protection pipe circulates through the secondary side of the first heat exchanger;
the primary side of the second heat exchanger is circulated with cooling liquid, and the liquid metal in the second annular protection pipe flows through the secondary side of the second heat exchanger in a circulating mode.
Optionally, a positive pole column is arranged on the first annular protection tube, and a negative pole column is arranged on the second annular protection tube.
Optionally, the first annular protection pipe and the second annular protection pipe are hoses made of insulating materials.
Optionally, the liquid metal is a low-temperature fusible low-resistivity liquid metal.
Optionally, a first circulating pump is installed on the first annular protection pipe, and a second circulating pump is installed on the second annular protection pipe.
Optionally, the surface of the first annular protection pipe is covered with a first heating wire, and the surface of the second annular protection pipe is covered with a second heating wire.
Optionally, the first heating wire and the second heating wire are both in an annular structure.
Optionally, the first heating wire and the second heating wire are both connected with a heating power supply device.
Optionally, the first withdrawing means comprises a first withdrawing pump and a first storage tank; the second withdrawing means includes a second withdrawing pump and a second storage tank.
Optionally, the first annular protection pipe and the second annular protection pipe are hard pipes of a multi-joint structure made of insulating materials.
Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has:
the embodiment of the utility model provides a take rifle structure that charges of voltage limiting protect function, utilize liquid metal both can fast heat dissipation cooling, reduced the volume and the weight of rifle that charges again; when the pressure value of the first pressure sensor is larger than the maximum preset value or smaller than the minimum preset value, the first withdrawing device withdraws the liquid metal in the first annular protection pipe; when the pressure value of the second pressure sensor is larger than the maximum preset value or smaller than the minimum preset value, the second withdrawing device withdraws the liquid metal in the second annular protection pipe, and potential safety hazards caused by overlarge or undersize liquid metal pressure are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural view of a charging gun structure provided by an embodiment of the present invention.
Fig. 2 is a schematic structural view of a charging gun structure with a heating function according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a charging gun structure with a voltage limiting protection function according to an embodiment of the present invention.
Illustration of the drawings:
the first loop protection pipe 10, the second loop protection pipe 11, the first heat exchanger 12, the second heat exchanger 13, the first cooling cycle device 14, the second cooling cycle device 15, the first heating wire 16, the second heating wire 17, the first pressure sensor 18, the second pressure sensor 19, the first withdrawal device 20, the second withdrawal device 21.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
Referring to fig. 1, the present embodiment provides a structural schematic diagram of a charging gun structure, including an insulating housing, in which a first annular protection tube 10 and a second annular protection tube 11 are disposed, and liquid metal is respectively filled in the first annular protection tube 10 and the second annular protection tube 11. The purpose of providing the first and second annular protection tubes 10, 11 in an annular configuration is to enable the liquid metal to circulate inside the protection tubes when charging. Therefore, both the first and second annular protection pipes 10 and 11 need to be installed with a circulation pump device.
The liquid metal in the first ring-shaped protection tube 10 is electrically connected to the positive pole of the power supply and the liquid metal in the second ring-shaped protection tube 11 is electrically connected to the negative pole of the power supply. The liquid metal in the first and second annular protective tubes 10, 11 serves as a positive and negative lead, respectively, for charging the device.
The first annular protection pipe 10 is connected with a first heat exchanger 12, and the first heat exchanger 12 is used for cooling the liquid metal in the first annular protection pipe 10.
The second annular protection pipe 11 is connected with a second heat exchanger 13, and the second heat exchanger 13 is used for cooling the liquid metal in the second annular protection pipe 11.
Under high current loads, liquid metal generates a large amount of heat. The embodiment utilizes the flow characteristics of the liquid metal and uses the first heat exchanger 12 and the second heat exchanger 13 to realize the functions of rapid heat dissipation and cooling.
Therefore, the rifle structure that charges that this embodiment provided utilizes liquid metal to replace traditional electric wire to supply power, utilizes liquid metal's flow characteristic, uses the heat exchanger to cool down, avoids installing the cooling tube in insulating casing, both can quick heat dissipation cooling, has reduced the volume and the weight of rifle that charges again, and it is more convenient to use.
Example two
On the basis of the first embodiment, the primary side of the first heat exchanger 12 circulates with the cooling liquid, and the liquid metal in the first ring-shaped protection pipe 10 circulates through the secondary side of the first heat exchanger 12.
The primary side of the second heat exchanger 13 circulates through with cooling liquid, and the liquid metal in the second annular protection pipe 11 circulates through the secondary side of the second heat exchanger 13.
Specifically, a first cooling cycle device 14 is connected to the primary side of the first heat exchanger 12, and a coolant circulates in the first cooling cycle device 14. A second cooling cycle device 15 is connected to the primary side of the second heat exchanger 13, and a coolant circulates in the second cooling cycle device 15.
Alternatively, the cooling source of the cooling circulation device may be cooled by electric refrigeration, or may be cooled by a cooling tower in an air cooling manner. Wherein the cooling liquid is water.
EXAMPLE III
On the basis of the first embodiment, the first annular protection tube 10 is provided with a positive pole, and the second annular protection tube 11 is provided with a negative pole. The positive pole column and the negative pole column are respectively and electrically connected with the liquid metal in the protective tube, and are respectively used for a positive pole and a negative pole for charging the equipment.
Example four
On the basis of the first embodiment, the first annular protection tube 10 and the second annular protection tube 11 are made of insulating materials, so that other safety accidents such as power leakage and circuit short circuit are prevented.
As an optional mode, first annular protection pipe 10 and second annular protection pipe 11 are hose construction, and hose construction conveniently rolls up and accomodates, reduces occupation space.
As an optional mode, the first annular protection tube 10 and the second annular protection tube 11 are hard tubes of a multi-joint structure, the multi-joint structure is convenient to fold and store, and occupied space is reduced.
EXAMPLE five
On the basis of the first embodiment, the liquid metal is low-temperature fusible and low-resistivity liquid metal. The liquid metal is in a liquid state at normal temperature by utilizing the low-temperature fusible characteristic of the liquid metal. Due to the low-resistivity characteristic of the liquid metal, the liquid metal has higher charging efficiency and lower heat generation.
In the known medium, only mercury in the simple substance is liquid metal, and gallium, rubidium and cesium are low-melting point metals.
EXAMPLE six
On the basis of the first embodiment, a first circulation pump is installed on the first annular protection pipe 10, and a second circulation pump is installed on the second annular protection pipe 11. The first circulating pump and the second circulating pump are used for respectively providing circulating power for the liquid metal in the first circulating pump and the second circulating pump.
EXAMPLE seven
Referring to fig. 2, on the basis of the first embodiment, the surface of the first annular protection pipe 10 is covered with a first heating wire 16, and the surface of the second annular protection pipe 11 is covered with a second heating wire 17.
Charging performance is poor because at some low temperatures (e.g., air temperatures of a few degrees below zero), the liquid metal does not melt. Therefore, the first heating wire 16 and the second heating wire 17 are used for accelerating the melting of the liquid metal in the low-temperature environment, and the problem that the charging performance is poor due to the fact that the liquid metal is not melted at the low temperature when charging is started is solved.
Example eight
On the basis of the seventh embodiment, the first heating wire 16 and the second heating wire 17 are both of annular structures, and the annular structures are matched with the first annular protection pipe 10 and the second annular protection pipe 11, so that the heating and melting of the liquid metal can be accelerated.
Example nine
On the basis of the seventh embodiment, the first heating wire 16 and the second heating wire 17 are both connected with a heating power supply device, that is, the necessary power supply is provided for the first heating wire 16 and the second heating wire 17.
Example ten
Firstly, it should be noted that, during charging, when the pressure of the liquid metal is too large or too small, a safety hazard is generated: when the pressure is too high, the risk of tube explosion exists; when the pressure is too small, there is a risk of leakage.
In order to solve the problem of the potential safety hazard, please refer to fig. 3, based on any of the above embodiments, a first pressure sensor 18 is installed on the first annular protection tube 10, and a second pressure sensor 19 is installed on the second annular protection tube 11. The first pressure sensor 18 is used to measure the real time pressure of the liquid metal in the first annular protection tube 10 and the second pressure sensor 19 is used to measure the real time pressure of the liquid metal in the second annular protection tube 11.
The charging gun structure further comprises a first withdrawing device 20 and a second withdrawing device 21, wherein the first withdrawing device 20 is communicated with the first annular protection tube 10, and the second withdrawing device 21 is communicated with the second annular protection tube 11. The first withdrawing means 20 may withdraw and store the liquid metal in the first ring-shaped protection pipe 10. The second withdrawal means 21 can withdraw and store the liquid metal in the second annular protection tube 11.
Further, the first retraction device 20 is electrically connected to the first pressure sensor 18, and the second retraction device 21 is electrically connected to the second pressure sensor 19.
Specifically, when the pressure value of the first pressure sensor 18 is greater than a maximum preset value or less than a minimum preset value, the first withdrawing device 20 is triggered to withdraw the liquid metal in the first ring-shaped protection tube 10.
When the pressure value of the second pressure sensor 19 is greater than a maximum preset value or less than a minimum preset value, the second withdrawing means 21 is triggered to withdraw the liquid metal inside the second annular protection tube 11.
Therefore, with the first and second withdrawing means 20 and 21, when the pressure value of the first pressure sensor 18 is greater than the maximum preset value or less than the minimum preset value, the first withdrawing means 20 withdraws the liquid metal inside the first ring-shaped protection tube 10; when the pressure value of the second pressure sensor 19 is greater than the maximum preset value or less than the minimum preset value, the second withdrawing device 21 withdraws the liquid metal in the second annular protection tube 11, so that the potential safety hazard generated when the pressure of the liquid metal is too large or too small is avoided.
As an alternative to this embodiment, the first pump-back device 20 comprises a first pump-back pump and a first storage tank; the second drawing device 21 includes a second drawing pump and a second storage tank. Withdrawing the liquid metal in the first ring-shaped protection pipe 10 by a first withdrawal pump and storing in a first storage tank; the liquid metal in the second annular protection pipe 11 is withdrawn by a second withdrawal pump and stored in a second storage tank.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The charging gun structure with the voltage limiting protection function is characterized by comprising an insulating shell, wherein a first annular protection tube and a second annular protection tube are arranged in the insulating shell, and liquid metal is filled in the first annular protection tube and the second annular protection tube respectively;
the liquid metal in the first annular protection tube is electrically connected to the positive pole of a power supply, and the liquid metal in the second annular protection tube is electrically connected to the negative pole of the power supply;
the first annular protection pipe is connected with a first heat exchanger, and the first heat exchanger is used for cooling the liquid metal in the first annular protection pipe;
the second annular protection pipe is connected with a second heat exchanger, and the second heat exchanger is used for cooling the liquid metal in the second annular protection pipe;
a first pressure sensor is arranged on the first annular protection pipe, and a second pressure sensor is arranged on the second annular protection pipe;
the charging gun structure further comprises a first withdrawing device and a second withdrawing device, the first withdrawing device is communicated with the first annular protection tube, and the second withdrawing device is communicated with the second annular protection tube;
the first withdrawing device is electrically connected to the first pressure sensor, and the second withdrawing device is electrically connected to the second pressure sensor;
when the pressure value of the first pressure sensor is larger than a maximum preset value or smaller than a minimum preset value, triggering the first withdrawing device to withdraw the liquid metal in the first annular protection pipe;
and when the pressure value of the second pressure sensor is greater than a maximum preset value or less than a minimum preset value, triggering the second withdrawing device to withdraw the liquid metal in the second annular protection pipe.
2. The charging gun structure with voltage limiting protection function according to claim 1,
a cooling liquid circulates on the primary side of the first heat exchanger, and the liquid metal in the first annular protection pipe circulates on the secondary side of the first heat exchanger;
the primary side of the second heat exchanger is circulated with cooling liquid, and the liquid metal in the second annular protection pipe flows through the secondary side of the second heat exchanger in a circulating mode.
3. The charging gun structure with voltage limiting protection function according to claim 1, wherein the first annular protection tube is provided with a positive pole, and the second annular protection tube is provided with a negative pole.
4. The charging gun structure with voltage limiting protection function according to claim 1, wherein the first annular protection tube and the second annular protection tube are hoses made of insulating materials.
5. The charging gun structure with voltage limiting protection function according to claim 1, wherein the liquid metal is a low-temperature fusible, low-resistivity liquid metal.
6. The charging gun structure with voltage limiting protection function according to claim 1, wherein a first circulation pump is installed on the first annular protection tube, and a second circulation pump is installed on the second annular protection tube.
7. The charging gun structure with voltage limiting protection function according to claim 1, wherein a surface of the first annular protection pipe is covered with a first heating wire, and a surface of the second annular protection pipe is covered with a second heating wire.
8. The charging gun structure with the voltage limiting protection function according to claim 7, wherein the first heating wire and the second heating wire are both of a ring structure.
9. The charging gun structure with the voltage limiting protection function according to claim 7, wherein the first heating wire and the second heating wire are both connected with a heating power supply device.
10. The charging gun structure with voltage limiting protection function according to claim 1, wherein the first withdrawing means comprises a first withdrawing pump and a first storage tank; the second withdrawing means includes a second withdrawing pump and a second storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920677344.4U CN210309976U (en) | 2019-05-13 | 2019-05-13 | Charging gun structure with voltage limiting protection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920677344.4U CN210309976U (en) | 2019-05-13 | 2019-05-13 | Charging gun structure with voltage limiting protection function |
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| CN210309976U true CN210309976U (en) | 2020-04-14 |
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| CN201920677344.4U Active CN210309976U (en) | 2019-05-13 | 2019-05-13 | Charging gun structure with voltage limiting protection function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109986984A (en) * | 2019-05-13 | 2019-07-09 | 广东电网有限责任公司 | A kind of charging gun structure with voltage-limiting protection function |
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2019
- 2019-05-13 CN CN201920677344.4U patent/CN210309976U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109986984A (en) * | 2019-05-13 | 2019-07-09 | 广东电网有限责任公司 | A kind of charging gun structure with voltage-limiting protection function |
| CN109986984B (en) * | 2019-05-13 | 2024-07-19 | 广东电网有限责任公司 | Charging gun structure with voltage limiting protection function |
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